/* ============ 联系通道 · page-contact ============ */

.page-contact {
  --ct-gap: clamp(54px, 7.6vw, 104px);
  --ct-pad: clamp(18px, 2.4vw, 28px);
  padding-top: calc(var(--header-offset) + 18px);
  padding-bottom: clamp(36px, 5vw, 72px);
}

.page-contact .breadcrumbs {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  margin: 0 0 clamp(22px, 3.2vw, 34px);
}

/* ---------- 首屏信息带 ---------- */

.page-contact .contact-hero {
  display: grid;
  gap: clamp(14px, 1.8vw, 20px);
  padding-bottom: clamp(34px, 5vw, 58px);
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(29px, 4.8vw, 50px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 19ch;
}

.page-contact .contact-hero .lede {
  max-width: 62ch;
}

.page-contact .contact-board {
  margin-top: clamp(16px, 2.4vw, 26px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(26, 36, 54, 0.4), rgba(11, 18, 32, 0.6));
}

.page-contact .contact-board__cell {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.2vw, 26px);
  border-top: 1px solid var(--line);
}

.page-contact .contact-board__cell:first-child {
  border-top: 0;
}

.page-contact .contact-board__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .contact-board__value {
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.page-contact .contact-board__value--mono {
  font-family: var(--mono);
  font-size: clamp(14px, 1.5vw, 16.5px);
  letter-spacing: 0.05em;
  line-height: 1.55;
  color: var(--cyan);
}

.page-contact .contact-board__meta {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

@media (min-width: 780px) {
  .page-contact .contact-board {
    display: grid;
    grid-template-columns: 1.3fr 0.82fr 1.32fr;
  }

  .page-contact .contact-board__cell {
    border-top: 0;
  }

  .page-contact .contact-board__cell + .contact-board__cell {
    border-left: 1px solid var(--line);
  }

  .page-contact .contact-board__cell + .contact-board__cell::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--line);
    opacity: 0.5;
  }
}

/* ---------- 章节骨架 ---------- */

.page-contact .contact-section {
  padding-top: var(--ct-gap);
}

.page-contact .section-head {
  display: grid;
  gap: 12px;
  max-width: 66ch;
  margin-bottom: clamp(22px, 3.2vw, 36px);
}

.page-contact .section-head h2,
.page-contact .contact-duo h2,
.page-contact .biz h2,
.page-contact .visit h2 {
  margin: 0;
}

.page-contact .prose {
  max-width: 64ch;
}

.page-contact .prose--small {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 通道示意图 ---------- */

.page-contact .channels-figure {
  margin: 0 0 clamp(20px, 2.8vw, 32px);
}

.page-contact .channels-figure .media-frame__img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 四条通道 ---------- */

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 880px) {
  .page-contact .channel-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 18px;
    align-items: start;
  }
}

.page-contact .channel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(26, 36, 54, 0.5), rgba(11, 18, 32, 0.88));
  transition: border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--acc, var(--cyan));
  opacity: 0.45;
  transition: opacity 0.28s var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel[open] {
  border-color: var(--acc, var(--cyan));
  box-shadow: var(--shadow-soft);
}

.page-contact .channel:hover::after,
.page-contact .channel[open]::after {
  opacity: 1;
}

.page-contact .channel__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "num title plus"
    "num desc plus";
  gap: 4px 14px;
  align-items: center;
  padding: clamp(18px, 2.2vw, 24px) clamp(18px, 2.2vw, 26px);
  cursor: pointer;
  list-style: none;
}

.page-contact .channel__head::-webkit-details-marker {
  display: none;
}

.page-contact .channel__num {
  grid-area: num;
  align-self: start;
  padding-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--acc, var(--cyan));
}

.page-contact .channel__title {
  grid-area: title;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

.page-contact .channel__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .channel__plus {
  grid-area: plus;
  position: relative;
  align-self: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: border-color 0.28s var(--ease);
}

.page-contact .channel__plus::before,
.page-contact .channel__plus::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--muted);
  transform: translate(-50%, -50%);
  transition: transform 0.28s var(--ease), background 0.28s var(--ease);
}

.page-contact .channel__plus::before {
  width: 9px;
  height: 1px;
}

.page-contact .channel__plus::after {
  width: 1px;
  height: 9px;
}

.page-contact .channel[open] .channel__plus {
  border-color: var(--acc, var(--cyan));
}

.page-contact .channel[open] .channel__plus::before {
  background: var(--acc, var(--cyan));
}

.page-contact .channel[open] .channel__plus::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-contact .channel__body {
  display: grid;
  gap: 14px;
  padding: 0 clamp(18px, 2.2vw, 26px) clamp(20px, 2.4vw, 26px);
}

.page-contact .channel__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .channel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--white);
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--acc, var(--cyan));
}

.page-contact .channel__hint {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

.page-contact .channel__hint a,
.page-contact .prep-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 231, 210, 0.35);
  transition: border-color 0.24s var(--ease);
}

.page-contact .channel__hint a:hover,
.page-contact .prep-note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 双栏：回复时间 + 提交准备 ---------- */

.page-contact .contact-duo {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

@media (min-width: 980px) {
  .page-contact .contact-duo {
    grid-template-columns: 1.32fr 0.88fr;
    align-items: start;
  }
}

.page-contact .contact-duo__main {
  display: grid;
  gap: 14px;
}

.page-contact .contact-duo__aside {
  padding: clamp(22px, 2.8vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(26, 36, 54, 0.62), rgba(11, 18, 32, 0.9));
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 8px;
}

.page-contact .contact-duo__aside h2 {
  margin-bottom: 6px;
}

/* 服务时间轴 */

.page-contact .shift {
  margin: clamp(6px, 1.2vw, 14px) 0 clamp(6px, 1.2vw, 12px);
}

.page-contact .shift__bar {
  display: flex;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(11, 18, 32, 0.8);
}

.page-contact .shift__off {
  flex: 0 0 37.5%;
  background: repeating-linear-gradient(
    135deg,
    rgba(26, 36, 54, 0.85) 0 6px,
    rgba(11, 18, 32, 0.85) 6px 12px
  );
}

.page-contact .shift__off--tail {
  flex: 0 0 25%;
}

.page-contact .shift__on {
  flex: 1 1 auto;
  display: grid;
  place-items: center;
  min-width: 0;
  position: relative;
  background: linear-gradient(90deg, rgba(53, 231, 210, 0.16), rgba(138, 107, 255, 0.16));
  border-left: 1px solid rgba(53, 231, 210, 0.55);
  border-right: 1px solid rgba(53, 231, 210, 0.55);
}

.page-contact .shift__on-text {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-contact .shift__scale {
  position: relative;
  height: 20px;
  margin-top: 8px;
}

.page-contact .shift__scale span {
  position: absolute;
  top: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .shift__scale span:nth-child(1) {
  left: 0;
}

.page-contact .shift__scale span:nth-child(2) {
  left: 37.5%;
  transform: translateX(-50%);
}

.page-contact .shift__scale span:nth-child(3) {
  left: 75%;
  transform: translateX(-50%);
}

.page-contact .shift__scale span:nth-child(4) {
  right: 0;
}

/* 提交准备清单 */

.page-contact .prep-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.page-contact .prep-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .prep-list li:last-child {
  border-bottom: 0;
}

.page-contact .prep-list__k {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--purple);
  padding-top: 3px;
}

.page-contact .prep-list__v {
  color: var(--white);
}

.page-contact .prep-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

/* ---------- 商务合作 ---------- */

.page-contact .biz {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-contact .biz__intro {
  display: grid;
  gap: 12px;
  max-width: 70ch;
}

.page-contact .biz-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 820px) {
  .page-contact .biz-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-contact .biz-item {
  position: relative;
  padding: clamp(22px, 2.8vw, 30px);
  background: linear-gradient(180deg, rgba(26, 36, 54, 0.45), rgba(11, 18, 32, 0.92));
  display: grid;
  gap: 10px;
  align-content: start;
  transition: background 0.28s var(--ease);
}

.page-contact .biz-item:hover {
  background: linear-gradient(180deg, rgba(26, 36, 54, 0.75), rgba(11, 18, 32, 0.95));
}

.page-contact .biz-item__num {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border: 1px solid rgba(53, 231, 210, 0.42);
  border-radius: 50%;
}

.page-contact .biz-item__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--white);
}

.page-contact .biz-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .biz-mail {
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-sm);
  padding: clamp(18px, 2.4vw, 26px);
  display: grid;
  gap: 10px;
  background: rgba(11, 18, 32, 0.7);
}

.page-contact .biz-mail__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-contact .biz-mail__sample {
  font-family: var(--mono);
  font-size: clamp(14px, 1.8vw, 18px);
  letter-spacing: 0.04em;
  color: var(--white);
  word-break: break-word;
}

.page-contact .biz-mail__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 到访与周边 ---------- */

.page-contact .visit {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 48px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-contact .visit {
    grid-template-columns: 1fr 1.06fr;
  }
}

.page-contact .visit__figure {
  margin: 0;
  aspect-ratio: 3 / 2;
}

.page-contact .visit__figure .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .visit__body {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .visit__addr {
  display: grid;
  gap: 8px;
  justify-items: start;
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(26, 36, 54, 0.4);
}

.page-contact .visit__addr-line {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-contact .visit__addr-line:last-of-type {
  color: var(--cyan);
}

/* ---------- 底部星轨 ---------- */

.page-contact .contact-arc {
  margin-top: clamp(46px, 6.4vw, 88px);
  opacity: 0.55;
}

.page-contact .contact-arc svg {
  display: block;
  width: 100%;
  height: clamp(56px, 8vw, 112px);
}

/* ---------- 窄屏适配 ---------- */

@media (max-width: 520px) {
  .page-contact .shift__bar {
    height: 34px;
  }

  .page-contact .shift__on-text {
    font-size: 10px;
    letter-spacing: 0.02em;
  }

  .page-contact .prep-list li {
    grid-template-columns: 62px 1fr;
    gap: 10px;
  }

  .page-contact .channel__head {
    grid-template-columns: auto 1fr auto;
    gap: 3px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel::after,
  .page-contact .channel__plus,
  .page-contact .channel__plus::before,
  .page-contact .channel__plus::after,
  .page-contact .biz-item,
  .page-contact .channel__hint a,
  .page-contact .prep-note a {
    transition: none;
  }
}
<<<END>>>

.page-contact {
  --acc: transparent;
}