.page-contact {
  --c-gap: clamp(16px, 3vw, 30px);
  background: var(--mist);
  color: var(--deep-text);
}

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

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--mist);
  padding: clamp(20px, 4vw, 38px) 0 clamp(30px, 5vw, 58px);
  border-radius: 0 0 calc(var(--radius-lg) * 1.4) calc(var(--radius-lg) * 1.4);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(560px, 74vw);
  height: min(560px, 74vw);
  background: radial-gradient(circle at center, rgba(255, 106, 43, .22), rgba(255, 106, 43, 0) 68%);
  pointer-events: none;
}

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

.page-contact .contact-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-contact .contact-hero .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-contact .contact-hero .breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-contact .contact-hero .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(244, 247, 248, .35);
}

.page-contact .contact-hero .breadcrumb__link {
  color: rgba(244, 247, 248, .72);
  text-decoration: none;
}

.page-contact .contact-hero .breadcrumb__link:hover,
.page-contact .contact-hero .breadcrumb__link[aria-current="page"] {
  color: var(--orange);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-contact .kicker {
  margin: 0;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-contact .contact-hero h1 {
  margin: .18em 0 .4em;
  font-size: clamp(32px, 7vw, 64px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-contact .contact-hero__lead {
  max-width: 46ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(244, 247, 248, .8);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(244, 247, 248, .16);
  border-radius: var(--radius-lg);
}

/* ---------- 三块通道卡 ---------- */

.page-contact .channel-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--mist);
  color: var(--deep-text);
  border: 1px solid rgba(244, 247, 248, .18);
  border-radius: var(--radius-lg);
  transition: transform .24s ease-out, box-shadow .24s ease-out, border-color .24s ease-out;
}

.page-contact .channel-card:hover {
  transform: translateY(-5px);
  border-color: var(--orange);
  box-shadow: 0 28px 52px -32px rgba(0, 0, 0, .8);
}

.page-contact .channel-card--hot {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

.page-contact .channel-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  opacity: .66;
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(17px, 4.6vw, 23px);
  line-height: 1.32;
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .channel-card--hot .channel-card__desc {
  color: rgba(16, 26, 36, .86);
}

.page-contact .channel-card__foot {
  margin: auto 0 0;
  padding-top: 4px;
}

.page-contact .channel-card__tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  background: var(--ink-2);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}

.page-contact .channel-card--hot .channel-card__tag {
  background: rgba(16, 26, 36, .92);
  color: #FFFFFF;
}

/* ---------- 通用章节 ---------- */

.page-contact .c-section {
  padding: clamp(38px, 5.6vw, 74px) 0;
}

.page-contact .c-head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .c-head h2 {
  margin: .22em 0 .5em;
  font-size: clamp(25px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-contact .c-head__note {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .c-panel__title {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

/* ---------- 响应时段 ---------- */

.page-contact .c-split {
  display: grid;
  gap: var(--c-gap);
}

.page-contact .c-panel {
  padding: clamp(20px, 2.6vw, 30px);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-contact .c-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-list li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .c-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .74em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

.page-contact .c-panel__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .c-panel a,
.page-contact .c-panel__note a,
.page-contact .c-item a,
.page-contact .c-footnote a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

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

.page-contact .c-step {
  display: grid;
  grid-template-columns: clamp(42px, 12vw, 60px) 1fr;
  gap: 4px 16px;
  padding: clamp(16px, 2vw, 22px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .c-step:first-child {
  border-top: 2px solid var(--orange);
}

.page-contact .c-step__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 44px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--orange);
}

.page-contact .c-step__body {
  min-width: 0;
}

.page-contact .c-step__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .c-step__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .c-steps__note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* ---------- 办公地址 ---------- */

.page-contact .c-address {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(22px, 3vw, 38px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 247, 248, .05) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(244, 247, 248, .05) 0 1px, transparent 1px 46px);
  color: var(--mist);
}

.page-contact .c-address__main {
  min-width: 0;
}

.page-contact .c-address__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-contact .c-address__value {
  margin: 0;
  font-size: clamp(18px, 2.6vw, 25px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist);
}

.page-contact .c-address__meta {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  letter-spacing: .02em;
  color: rgba(244, 247, 248, .72);
  overflow-wrap: anywhere;
}

.page-contact .c-address__aside {
  display: grid;
  gap: 8px;
  align-content: start;
  padding-top: 18px;
  border-top: 1px solid rgba(244, 247, 248, .16);
}

.page-contact .c-address__aside .c-address__label:nth-of-type(2) {
  margin-top: 14px;
}

.page-contact .c-address__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 247, 248, .8);
}

/* ---------- 合作与订阅 ---------- */

.page-contact .c-collab {
  display: grid;
  gap: var(--c-gap);
}

.page-contact .c-item {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-contact .c-item:first-child {
  border-top: 2px solid var(--ink);
}

.page-contact .c-item h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .c-item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .c-aside {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-contact .c-aside img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-contact .c-aside__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 提交前核对 ---------- */

.page-contact .c-checks {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-check {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(18px, 2.2vw, 24px);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color .2s ease-out;
}

.page-contact .c-check:hover {
  border-color: var(--slate);
}

.page-contact .c-check__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--orange);
}

.page-contact .c-check__box {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 6px 12px;
  align-items: start;
  cursor: pointer;
}

.page-contact .c-check__box input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--orange);
}

.page-contact .c-check__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .c-check__desc {
  grid-column: 2;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .c-check__box input:checked ~ .c-check__title {
  color: var(--slate);
  text-decoration: line-through;
  text-decoration-color: var(--orange);
  text-decoration-thickness: 2px;
}

.page-contact .c-footnote {
  max-width: 62ch;
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-contact .c-checks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-contact .c-address {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-contact .c-address__aside {
    padding-top: 0;
    padding-left: clamp(18px, 2.4vw, 30px);
    border-top: 0;
    border-left: 1px solid rgba(244, 247, 248, .16);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-contact .c-split {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-contact .c-collab {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .c-check {
    transition: none;
  }

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