/* ================= 合作与联系 / cooperation ================= */
.page-contact {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---- 面包屑 ---- */
.page-contact .contact-crumb {
  padding-top: clamp(16px, 3vw, 26px);
}
.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}
.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-contact .breadcrumb-current {
  color: var(--deep);
}

/* ---- 首屏：大面积留白 + 右上斜切色块 ---- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 7vw, 92px) 0 clamp(44px, 7vw, 104px);
}
.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 8px;
  background: var(--deep);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 52%);
  z-index: 0;
}
.page-contact .contact-hero-inner {
  position: relative;
  z-index: 2;
  border-left: 3px solid var(--green);
  padding-left: clamp(16px, 2.6vw, 30px);
  max-width: 68ch;
}
.page-contact .contact-kicker {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--moss);
}
.page-contact .contact-kicker-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  background: var(--deep);
  color: var(--cream);
  padding: 2px 6px;
}
.page-contact .contact-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 5.6vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--deep);
}
.page-contact .contact-lede {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink);
  max-width: 58ch;
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: clamp(72px, 10vw, 130px) 0 clamp(72px, 9vw, 126px);
  }
  .page-contact .contact-hero::after {
    top: 6%;
    right: -3%;
    left: auto;
    width: min(32%, 400px);
    height: 72%;
    background: linear-gradient(158deg, var(--deep) 0%, var(--forest) 100%);
    clip-path: polygon(17% 0, 100% 0, 100% 100%, 0 100%);
  }
  .page-contact .contact-hero-inner {
    max-width: min(620px, 58%);
  }
}

/* ---- 章节通用 ---- */
.page-contact .contact-block {
  padding: clamp(44px, 7vw, 86px) 0;
}
.page-contact .contact-block + .contact-block {
  border-top: 1px solid var(--line);
}
.page-contact .block-head {
  position: relative;
  padding-left: clamp(16px, 2.4vw, 26px);
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-contact .block-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 1px;
  background: var(--line);
  transition: width 220ms var(--ease), background-color 220ms var(--ease);
}
.page-contact .contact-block.is-current .block-head::before {
  width: 3px;
  background: var(--green);
}
.page-contact .block-index {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 8px;
  background: var(--deep);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: .12em;
}
.page-contact .block-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--deep);
}
.page-contact .block-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
  max-width: 62ch;
}
.page-contact .contact-block a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--moss-soft);
}
.page-contact .contact-block a:hover,
.page-contact .contact-block a:focus-visible {
  border-bottom-color: var(--green);
}

/* ---- 01 渠道条 ---- */
.page-contact .channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-contact .channel {
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 28px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--rail, var(--green));
}
.page-contact .channel--mail { --rail: var(--green); }
.page-contact .channel--phone { --rail: var(--clay); }
.page-contact .channel--post { --rail: var(--moss); }

.page-contact .channel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.page-contact .channel-label {
  font-family: var(--font-index);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--deep);
}
.page-contact .channel-tag {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--moss);
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 2px 7px;
}
.page-contact .channel-value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.9vw, 19px);
  line-height: 1.55;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.page-contact .channel-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

@media (min-width: 900px) {
  .page-contact .channel {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.35fr);
    grid-template-areas:
      "head head"
      "value note";
    gap: 10px 48px;
    align-items: start;
  }
  .page-contact .channel-head { grid-area: head; margin-bottom: 4px; }
  .page-contact .channel-value { grid-area: value; margin-bottom: 0; }
  .page-contact .channel-note { grid-area: note; }
}

/* ---- 02 写信清单 ---- */
.page-contact .letter-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-contact .letter-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-contact .letter-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .letter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--clay);
  padding-top: 3px;
}
.page-contact .letter-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}
.page-contact .letter-text strong {
  font-weight: 600;
  color: var(--deep);
}
.page-contact .letter-figure {
  margin: 0;
}
.page-contact .letter-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-contact .letter-figure figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
  max-width: 40ch;
}
.page-contact .contact-disclosure {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.page-contact .disclosure-toggle {
  font-family: var(--font-index);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--deep);
  background: none;
  border: 0;
  border-bottom: 1px solid var(--moss-soft);
  padding: 4px 0;
  cursor: pointer;
}
.page-contact .disclosure-toggle:hover,
.page-contact .disclosure-toggle:focus-visible {
  border-bottom-color: var(--green);
}
.page-contact .disclosure-panel {
  margin-top: 14px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}
.page-contact .disclosure-panel p {
  margin: 0 0 .9em;
}
.page-contact .disclosure-panel p:last-child {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .page-contact .letter-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

/* ---- 03 合作说明 ---- */
.page-contact .coop-grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}
.page-contact .coop-lead p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 58ch;
}
.page-contact .coop-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-contact .coop-facts li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}
.page-contact .coop-facts .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
}

@media (min-width: 900px) {
  .page-contact .coop-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

/* ---- 04 回复时间 ---- */
.page-contact .time-note {
  border-top: 1px solid var(--line);
}
.page-contact .time-line {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}
.page-contact .time-key {
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--moss);
}

@media (min-width: 760px) {
  .page-contact .time-line {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

/* ---- 05 通信地址 ---- */
.page-contact .addr-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-contact .river-line {
  display: block;
  width: min(420px, 100%);
  height: 36px;
  color: var(--clay);
  margin: 0 0 20px;
}
.page-contact .addr-main p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 56ch;
}
.page-contact .addr-main p:last-child {
  margin-bottom: 0;
}
.page-contact .addr-figure {
  margin: 0;
}
.page-contact .addr-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .55fr);
    align-items: start;
  }
}

/* ---- 06 常见误区 ---- */
.page-contact .myth-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-contact .myth-pair {
  display: grid;
  border: 1px solid var(--line);
  background: var(--paper);
}
.page-contact .myth-cell {
  margin: 0;
  padding: 15px 18px;
  font-size: 15px;
  line-height: 1.75;
}
.page-contact .myth-cell--wrong {
  border-left: 3px solid var(--clay);
  color: var(--stone);
}
.page-contact .myth-cell--right {
  border-left: 3px solid var(--green);
  background: var(--cream);
  color: var(--ink);
}
.page-contact .myth-label {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 6px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: .08em;
  vertical-align: 1px;
}
.page-contact .myth-cell--wrong .myth-label {
  background: var(--cream);
  border: 1px solid var(--line);
  color: var(--stone);
}
.page-contact .myth-cell--right .myth-label {
  background: var(--green);
  color: var(--deep);
}

@media (min-width: 760px) {
  .page-contact .myth-pair {
    grid-template-columns: 1fr 1fr;
  }
  .page-contact .myth-cell--wrong {
    border-right: 1px solid var(--line);
  }
  .page-contact .myth-cell--right {
    border-left: 3px solid var(--green);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .block-head::before {
    transition: none;
  }
  .page-contact .contact-block.is-current .block-head::before {
    width: 3px;
  }
}
<<<END>>>