.page-contact {
  --contact-cut: 16px;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 2.5rem);
  padding-bottom: 3rem;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--flame), var(--lava) 42%, var(--cyan));
}

.page-contact .contact-hero .eyebrow {
  margin-top: 1.4rem;
}

.page-contact .contact-hero h1 {
  margin: 0.6rem 0 1.1rem;
  font-size: clamp(2.15rem, 8.4vw, 4.6rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
}

.page-contact .contact-hero .lede {
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: rgba(253, 251, 247, 0.82);
}

.page-contact .hero-facts {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .hero-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(244, 239, 231, 0.18);
}

.page-contact .hero-fact-k {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .hero-fact-v {
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

/* ---------- 章节标题 ---------- */

.page-contact .chapter {
  margin: 0 0 1.6rem;
}

.page-contact .chapter-num {
  font-family: var(--font-mono);
  color: var(--flame);
}

.page-contact .chapter-title {
  font-size: clamp(1.5rem, 5.2vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* ---------- 01 联系通道 ---------- */

.page-contact .contact-media {
  margin: 0 0 2.2rem;
}

.page-contact .contact-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
}

.page-contact .contact-media figcaption {
  margin-top: 0.9rem;
  max-width: 58ch;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--gray);
}

.page-contact .channel-stack {
  display: grid;
  gap: 1rem;
}

.page-contact .channel {
  position: relative;
  padding: 1.4rem 1.3rem 1.4rem 1.7rem;
  background: var(--white);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, 0 100%);
  transition: border-color 0.25s ease;
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--flame);
}

.page-contact .channel:hover {
  border-color: var(--flame);
}

.page-contact .channel-badge {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.12rem 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--flame);
  border: 1px solid currentColor;
}

.page-contact .channel-name {
  margin: 0 0 0.3rem;
  font-size: var(--fs-20);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .channel-value {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 4.4vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  word-break: break-all;
}

.page-contact .channel-for {
  margin: 0 0 0.65rem;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .channel-hint {
  margin: 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--rule);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--gray);
}

.page-contact .channel-hint a {
  color: var(--flame);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-aside {
  margin-top: 1.4rem;
  padding: 1.5rem 1.4rem;
  background: var(--ink);
  color: var(--white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--contact-cut)), calc(100% - var(--contact-cut)) 100%, 0 100%);
}

.page-contact .aside-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .aside-num {
  margin: 0.35rem 0 1rem;
  font-size: clamp(3rem, 13vw, 4.4rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--flame);
}

.page-contact .aside-num span {
  margin-left: 0.4rem;
  font-size: var(--fs-16);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--white);
}

.page-contact .aside-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-contact .aside-list li {
  position: relative;
  padding-left: 1rem;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: rgba(253, 251, 247, 0.82);
}

.page-contact .aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-contact .aside-note {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(253, 251, 247, 0.16);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: rgba(253, 251, 247, 0.6);
}

/* ---------- 02 服务节奏 ---------- */

.page-contact .timeline {
  margin: 2.2rem 0 0;
}

.page-contact .timeline-track {
  position: relative;
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(244, 239, 231, 0.14);
}

.page-contact .timeline-fill {
  position: absolute;
  inset: 0;
  display: block;
  border-radius: 999px;
  background-image: linear-gradient(90deg, var(--flame), var(--lava) 55%, var(--amber));
  background-size: 220% 100%;
  animation: contact-sweep 6s ease-in-out infinite alternate;
}

@keyframes contact-sweep {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

.page-contact .timeline-scale {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: rgba(244, 239, 231, 0.6);
}

.page-contact .timeline-scale li:first-child {
  color: var(--flame);
}

.page-contact .timeline-scale li:last-child {
  color: var(--cyan);
}

.page-contact .response-notes {
  margin-top: 2rem;
}

.page-contact .note-card {
  padding: 1.2rem 1.3rem;
  border: 1px solid rgba(244, 239, 231, 0.16);
  background: rgba(244, 239, 231, 0.04);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-contact .note-card h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-16);
  color: var(--amber);
}

.page-contact .note-card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: rgba(253, 251, 247, 0.78);
}

/* ---------- 03 合作 ---------- */

.page-contact .coop-paths {
  display: grid;
  gap: 1rem;
}

.page-contact .coop-node {
  position: relative;
  padding: 1.3rem 1.3rem 1.3rem 3.5rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-contact .coop-idx {
  position: absolute;
  top: 1.25rem;
  left: 1.15rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-contact .coop-node h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-20);
  letter-spacing: -0.01em;
}

.page-contact .coop-node p {
  margin: 0 0 0.85rem;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .coop-need {
  list-style: none;
  margin: 0;
  padding: 0.8rem 0 0;
  border-top: 1px dashed var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-contact .coop-need li {
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--cyan-deep);
  border: 1px solid rgba(0, 119, 168, 0.32);
}

.page-contact .coop-figure {
  margin: 1.4rem 0 0;
}

.page-contact .coop-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 04 登记信息 ---------- */

.page-contact .reg-list {
  margin: 1.6rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(244, 239, 231, 0.16);
}

.page-contact .reg-row {
  display: grid;
  gap: 0.3rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid rgba(244, 239, 231, 0.16);
}

.page-contact .reg-row dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .reg-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  color: var(--white);
  word-break: break-word;
}

/* ---------- 05 自查 ---------- */

.page-contact .check-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-contact .check-list li {
  display: grid;
  gap: 0.3rem;
  padding: 1.1rem 1.2rem;
  background: var(--white);
}

.page-contact .check-list b {
  font-size: var(--fs-16);
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-contact .check-list span {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--gray);
}

.page-contact .check-foot {
  margin: 1.6rem 0 0;
  max-width: 64ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .check-foot a {
  color: var(--lava);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-next {
  list-style: none;
  margin: 2rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 0.7rem;
}

.page-contact .contact-next li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.7rem;
  font-size: var(--fs-14);
}

.page-contact .contact-next a {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--flame);
  border-bottom: 1px solid currentColor;
  text-decoration: none;
}

.page-contact .contact-next span {
  color: var(--gray);
  line-height: 1.7;
}

/* ---------- 响应式 ---------- */

@media (min-width: 768px) {
  .page-contact {
    --contact-cut: 18px;
  }

  .page-contact .hero-facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-contact .hero-facts li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    border-bottom: 0;
    border-left: 2px solid rgba(255, 90, 31, 0.55);
    padding: 0 0 0 1rem;
  }

  .page-contact .contact-aside {
    margin-top: 0;
  }

  .page-contact .check-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .reg-row {
    grid-template-columns: 180px 1fr;
    align-items: baseline;
    gap: 1.5rem;
  }

  .page-contact .coop-figure {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-hero {
    padding-top: calc(var(--header-h) + 4rem);
    padding-bottom: 4.5rem;
  }

  .page-contact .contact-media {
    margin-bottom: 3rem;
  }

  .page-contact .contact-media img {
    aspect-ratio: 21 / 9;
  }

  .page-contact .contact-aside {
    padding: 1.8rem 1.6rem;
  }

  .page-contact .coop-figure {
    margin-top: 0;
  }

  .page-contact .coop-paths {
    gap: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .timeline-fill {
    animation: none;
  }

  .page-contact .channel {
    transition: none;
  }
}