.page-contact {
  color: var(--text);
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3.5rem, 8vw, 6rem);
}

.page-contact a:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- 页头 ---------- */
.page-contact .contact-head {
  display: grid;
  gap: .9rem;
  max-width: 62ch;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.page-contact .contact-head .breadcrumbs {
  font-size: .8rem;
  color: var(--muted);
}

.page-contact h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.8rem, 4.8vw, 3.1rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  text-wrap: balance;
}

.page-contact .contact-lede {
  margin: 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--winter);
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

/* ---------- 两栏骨架 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

.page-contact .contact-rail {
  display: grid;
  gap: 1.75rem;
  align-content: start;
}

.page-contact .rail-index__title,
.page-contact .rail-clock__title {
  margin: 0 0 .6rem;
  font-family: var(--font-num);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--winter);
}

.page-contact .rail-index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-contact .rail-index a {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .42rem .1rem .42rem .7rem;
  border-left: 2px solid var(--line-soft);
  color: var(--muted);
  font-size: .87rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-contact .rail-index a:hover,
.page-contact .rail-index a:focus-visible {
  color: var(--teal);
  border-left-color: var(--teal);
  background: rgba(33, 230, 193, .05);
}

.page-contact .rail-index a .mono {
  font-size: .72rem;
  color: var(--winter);
}

.page-contact .rail-clock {
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: .85rem;
}

.page-contact .rail-clock__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .7rem;
  align-items: baseline;
}

.page-contact .rail-clock__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1;
  color: var(--autumn);
}

.page-contact .rail-clock__label {
  font-size: .78rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 章节 ---------- */
.page-contact .c-section {
  padding-block: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 6rem;
}

.page-contact .c-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-contact .c-head {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.page-contact .c-num {
  flex: none;
  font-family: var(--font-num);
  font-size: clamp(1.35rem, 3.2vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .01em;
  color: rgba(169, 198, 216, .28);
  padding-top: .12rem;
}

.page-contact .c-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.4;
  letter-spacing: -.01em;
}

.page-contact .c-sub {
  margin: .5rem 0 0;
  max-width: 58ch;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .c-sub a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 230, 193, .35);
}

.page-contact .c-sub a:hover {
  border-bottom-color: var(--teal);
}

/* ---------- 联络通道 ---------- */
.page-contact .contact-media {
  margin-bottom: 1.35rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-contact .contact-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

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

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.5rem 1.3rem 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: background .25s var(--ease), transform .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--ch, var(--teal));
}

.page-contact .channel--mail { --ch: var(--teal); }
.page-contact .channel--phone { --ch: var(--autumn); }
.page-contact .channel--place { --ch: var(--winter); }

.page-contact .channel:hover {
  background: var(--panel-up);
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-contact .channel__tag {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin: 0;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--winter);
}

.page-contact .channel__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ch, var(--teal));
}

.page-contact .channel__value {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .channel__value.mono {
  font-family: var(--font-num);
  font-size: .87rem;
  letter-spacing: -.01em;
}

.page-contact .channel__for {
  margin: 0;
  font-size: .84rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .channel__foot {
  margin: auto 0 0;
  padding-top: .9rem;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--winter);
}

/* ---------- 勘误准备清单 ---------- */
.page-contact .prep-list {
  counter-reset: prep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-contact .prep-list > li {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  column-gap: .9rem;
  padding: 1.05rem 1.15rem;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .prep-list > li:hover {
  background: var(--panel-up);
  border-color: var(--line);
}

.page-contact .prep-list > li::before {
  counter-increment: prep;
  content: counter(prep, decimal-leading-zero);
  grid-row: 1 / span 2;
  align-self: start;
  justify-self: start;
  margin-top: .12rem;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid rgba(55, 214, 122, .45);
  border-radius: 6px;
  font-family: var(--font-num);
  font-size: .72rem;
  line-height: 1;
  color: var(--spring);
}

.page-contact .prep__term {
  grid-column: 2;
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.6;
}

.page-contact .prep__desc {
  grid-column: 2;
  font-size: .855rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 受理事项 ---------- */
.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-contact .scope-list > li {
  display: grid;
  gap: .3rem;
  padding: 1.05rem .2rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .scope-list > li:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-contact .scope__name {
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.6;
}

.page-contact .scope__desc {
  font-size: .86rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .scope__time {
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--winter);
}

.page-contact .scope-list > li.is-errata .scope__time {
  color: var(--summer);
}

.page-contact .scope-list > li.is-errata .scope__name::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: .5rem;
  border-radius: 50%;
  background: var(--summer);
  vertical-align: middle;
}

/* ---------- 处理流程 ---------- */
.page-contact .process-wrap {
  display: grid;
  gap: 2rem;
}

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

.page-contact .steps > li {
  position: relative;
  padding: 0 0 1.8rem 2.6rem;
}

.page-contact .steps > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .28rem;
  width: .95rem;
  height: .95rem;
  border-radius: 50%;
  border: 2px solid var(--spring);
  background: var(--ink);
}

.page-contact .steps > li::after {
  content: "";
  position: absolute;
  left: .44rem;
  top: 1.5rem;
  bottom: .15rem;
  width: 1px;
  background: var(--line);
}

.page-contact .steps > li:nth-child(2)::before { border-color: var(--autumn); }
.page-contact .steps > li:nth-child(3)::before { border-color: var(--teal); }
.page-contact .steps > li:nth-child(4)::before { border-color: var(--winter); }

.page-contact .steps > li:last-child {
  padding-bottom: 0;
}

.page-contact .steps > li:last-child::after {
  display: none;
}

.page-contact .step__title {
  margin: 0 0 .3rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
}

.page-contact .step__desc {
  margin: 0;
  max-width: 46ch;
  font-size: .86rem;
  line-height: 1.82;
  color: var(--muted);
}

.page-contact .process-figure {
  margin: 0;
}

.page-contact .process-figure img {
  display: block;
  width: 100%;
  max-width: 22rem;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
}

.page-contact .process-figure figcaption {
  margin-top: .75rem;
  max-width: 22rem;
  font-size: .76rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 互校合作 ---------- */
.page-contact .partner-grid {
  display: grid;
  gap: 1.25rem;
}

.page-contact .partner-block {
  padding: 1.35rem 1.3rem 1.4rem;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
}

.page-contact .partner-block h3 {
  margin: 0 0 .9rem;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
}

.page-contact .partner-block h3::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  margin-top: .55rem;
  border-radius: 2px;
  background: var(--autumn);
}

.page-contact .partner-block:nth-child(2) h3::after {
  background: var(--winter);
}

.page-contact .partner-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-contact .partner-block li {
  position: relative;
  padding-left: 1rem;
  font-size: .86rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .partner-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(169, 198, 216, .5);
}

/* ---------- 常见反馈 ---------- */
.page-contact .type-grid {
  display: grid;
  gap: 1rem;
}

.page-contact .type-card {
  display: grid;
  gap: .55rem;
  align-content: start;
  padding: 1.3rem 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  transition: background .25s var(--ease), transform .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .type-card:hover {
  background: var(--panel-up);
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-contact .type-card__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--winter);
}

.page-contact .type-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .98rem;
  line-height: 1.5;
}

.page-contact .type-card p {
  margin: 0;
  font-size: .85rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .type-card .type-card__tip {
  padding-top: .7rem;
  border-top: 1px dashed var(--line-soft);
  font-size: .8rem;
  color: var(--winter);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 720px) {
  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

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

@media (min-width: 780px) {
  .page-contact .scope-list > li {
    grid-template-columns: 8.5rem minmax(0, 1fr) 10rem;
    align-items: baseline;
    column-gap: 1.4rem;
    padding-inline: .8rem;
    transition: background .25s var(--ease);
  }

  .page-contact .scope-list > li:hover {
    background: var(--panel);
  }

  .page-contact .scope__time {
    justify-self: start;
    white-space: nowrap;
  }
}

@media (min-width: 900px) {
  .page-contact .process-wrap {
    grid-template-columns: minmax(0, 1fr) 17rem;
    gap: 2.5rem;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-layout {
    grid-template-columns: 13.5rem minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .type-card,
  .page-contact .prep-list > li {
    transition: none;
  }

  .page-contact .channel:hover,
  .page-contact .type-card:hover {
    transform: none;
  }
}