/* ===== 合作与联系 ===== */
.page-contact {
  --cn-h2: clamp(1.5rem, 3.4vw, 2.4rem);
  --cn-card-pad: clamp(20px, 2.6vw, 30px);
  --cn-block: clamp(40px, 7vw, 88px);
  color: var(--c-cream);
}

.page-contact .crumb {
  padding-block: clamp(14px, 2vw, 22px);
}

.page-contact .crumb__sep {
  margin-inline: 8px;
  color: var(--c-rock);
  font-family: var(--font-mono);
  font-size: var(--step--1);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-block: clamp(4px, 1.5vw, 16px) clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-contact .contact-hero__index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--c-signal);
}

.page-contact .contact-hero h1 {
  margin: 0 0 18px;
  font-size: var(--step-2);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--c-cream);
  max-width: 18ch;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-carbon);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

/* ---------- 通用区块 ---------- */
.page-contact .contact-section {
  padding-block: var(--cn-block);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-section--carbon {
  background: var(--c-carbon);
}

.page-contact .contact-section--last {
  border-bottom: 0;
}

.page-contact .contact-section__head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-contact .contact-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-season);
}

.page-contact .contact-section h2 {
  margin: 0 0 14px;
  font-size: var(--cn-h2);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.page-contact .contact-section__intro {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: rgba(243, 239, 228, 0.78);
}

/* ---------- 01 联系渠道 ---------- */
.page-contact .channels {
  display: grid;
  gap: var(--gap);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--cn-card-pad);
  background: var(--c-moss);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--c-rock);
  opacity: 0.45;
}

.page-contact .channel--mail::after {
  background: var(--c-signal);
  opacity: 1;
}

.page-contact .channel__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-season);
}

.page-contact .channel__name {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-cream);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-signal);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--addr {
  font-family: var(--font-cn);
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--c-cream);
}

.page-contact .channel__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(243, 239, 228, 0.74);
}

.page-contact .channel__meta {
  margin: auto 0 0;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  color: var(--c-verify);
}

.page-contact .contact-records {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  color: var(--c-rock);
}

.page-contact .contact-records__key {
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
}

.page-contact .contact-records__val {
  font-family: var(--font-mono);
  color: var(--c-cream);
}

.page-contact .contact-records__link {
  margin-left: auto;
  color: var(--c-verify);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (min-width: 820px) {
  .page-contact .channels {
    grid-template-columns: 5fr 4fr 3fr;
    align-items: stretch;
  }
}

/* ---------- 02 受理节奏 ---------- */
.page-contact .rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .rhythm__item {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 24px) var(--cn-card-pad);
  background: var(--c-pitch);
}

.page-contact .rhythm__time {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-signal);
}

.page-contact .rhythm__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(243, 239, 228, 0.78);
}

@media (min-width: 760px) {
  .page-contact .rhythm__item {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(16px, 3vw, 40px);
    align-items: baseline;
  }
}

/* ---------- 03 勘误清单 ---------- */
.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: cn-check;
}

.page-contact .checklist li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 18px;
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--c-cream);
}

.page-contact .checklist li::before {
  content: "□";
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--c-verify);
}

.page-contact .note--verify {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--c-verify);
  border-radius: 0 10px 10px 0;
  background: var(--c-pending);
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--c-cream);
}

.page-contact .correction-more {
  margin: 18px 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(243, 239, 228, 0.7);
}

.page-contact .correction-more a {
  color: var(--c-verify);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 04 合作方向 ---------- */
.page-contact .tracks {
  display: grid;
  gap: var(--gap);
}

.page-contact .track {
  position: relative;
  padding: var(--cn-card-pad);
  background: var(--c-moss);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-contact .track::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--cn-card-pad);
  bottom: var(--cn-card-pad);
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--c-signal);
  opacity: 0.85;
}

.page-contact .track__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-season);
}

.page-contact .track__name {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-cream);
}

.page-contact .track__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(243, 239, 228, 0.76);
}

.page-contact .track__fit {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  color: var(--c-rock);
}

@media (min-width: 860px) {
  .page-contact .tracks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .track:nth-child(2) {
    margin-top: 28px;
  }

  .page-contact .track:nth-child(3) {
    margin-top: 56px;
  }
}

/* ---------- 05 合作流程 ---------- */
.page-contact .flow {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .flow__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-pitch);
}

.page-contact .flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 25 / 16;
  object-fit: cover;
}

.page-contact .flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.6vw, 30px);
}

.page-contact .flow__step {
  position: relative;
  padding-left: 52px;
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 36px;
  bottom: calc(-1 * clamp(20px, 2.6vw, 30px));
  width: 1px;
  background: var(--line);
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__no {
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  margin: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-signal);
  border-radius: 50%;
  background: var(--c-carbon);
  color: var(--c-signal);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
}

.page-contact .flow__step-name {
  margin: 4px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-cream);
}

.page-contact .flow__step-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(243, 239, 228, 0.76);
}

.page-contact .flow__hint {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.03em;
  color: var(--c-verify);
  opacity: 0.6;
  transform: translateY(-2px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .flow__step:hover .flow__hint,
.page-contact .flow__step:focus-within .flow__hint {
  opacity: 1;
  transform: none;
}

@media (min-width: 900px) {
  .page-contact .flow {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 06 沟通提示 ---------- */
.page-contact .asks {
  display: grid;
  gap: 12px;
}

.page-contact .ask {
  background: var(--c-moss);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .ask .panel__head {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(16px, 2.2vw, 22px) var(--cn-card-pad);
  background: none;
  border: 0;
  color: var(--c-cream);
  font-family: var(--font-cn);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
}

.page-contact .ask .panel__head::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--c-signal);
}

.page-contact .ask .panel__body {
  padding: 0 var(--cn-card-pad) clamp(16px, 2.2vw, 22px);
}

.page-contact .ask .panel__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(243, 239, 228, 0.76);
}

.page-contact .ask .panel__body a {
  color: var(--c-verify);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-contact .ask[data-collapsed] .panel__body {
  display: none;
}

.page-contact .ask[data-collapsed] .panel__head::after {
  content: "－";
}

.page-contact .closing-note {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--c-cream);
}

@media (max-width: 480px) {
  .page-contact .checklist li {
    grid-template-columns: 24px minmax(0, 1fr);
    padding: 12px 14px;
  }

  .page-contact .flow__step {
    padding-left: 44px;
  }

  .page-contact .contact-records__link {
    margin-left: 0;
  }
}