.page-contact {
  --rail-w: 300px;
  --block-gap: clamp(48px, 7vw, 92px);
  display: block;
  padding-bottom: clamp(56px, 9vw, 120px);
  background:
    radial-gradient(120% 70% at 92% 0%, rgba(35, 197, 214, 0.10), transparent 60%),
    radial-gradient(90% 55% at 0% 100%, rgba(255, 122, 24, 0.08), transparent 70%),
    var(--surface);
  color: var(--fg);
}

.page-contact .contact-hero {
  position: relative;
  padding: clamp(30px, 5vw, 66px) 0 clamp(22px, 3vw, 34px);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 22px);
  pointer-events: none;
}

.page-contact .contact-hero__eyebrow {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-contact .contact-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 8vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.page-contact .contact-hero__lede {
  max-width: 64ch;
  margin: 18px 0 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-contact .contact-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 60px);
  padding-top: clamp(32px, 5vw, 60px);
}

.page-contact .contact-shell,
.page-contact .contact-main,
.page-contact .contact-rail {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-contact .contact-shell {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
  }
}

/* ---------- 左栏：联系人刻度栏 ---------- */

.page-contact .contact-rail {
  align-self: start;
}

.page-contact .contact-rail__media {
  margin: 0 0 22px;
}

.page-contact .media-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .contact-rail__inner {
  border-top: 2px solid var(--orange);
  padding-top: 16px;
}

@media (min-width: 1000px) {
  .page-contact .contact-rail__inner {
    position: sticky;
    top: 104px;
  }
}

.page-contact .contact-rail__title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.page-contact .channel {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .channel__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
  padding-top: 3px;
}

.page-contact .channel__val {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--fg);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .rail-mark {
  display: block;
  margin: 14px 0 0;
  color: var(--cyan);
  opacity: 0.85;
}

.page-contact .contact-rail__note {
  margin: 14px 0 0;
  padding: 12px 14px;
  background: rgba(244, 241, 232, 0.05);
  border-left: 2px solid var(--marker);
  font-size: 14px;
  line-height: 1.72;
  color: var(--fg-muted);
}

/* ---------- 右栏 ---------- */

.page-contact .contact-main {
  display: flex;
  flex-direction: column;
  gap: var(--block-gap);
}

.page-contact .section__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-contact .section__kicker {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .section__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-contact .section__lede {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-contact .prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--fg-muted);
}

.page-contact .prose p:last-child {
  margin-bottom: 0;
}

.page-contact .prose strong {
  color: var(--fg);
  font-weight: 700;
}

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

/* ---------- 01 类型 ---------- */

.page-contact .type-picks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-contact .type-pick {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  padding: 9px 15px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .type-pick:hover {
  border-color: var(--orange-soft);
  color: var(--fg);
  transform: translateY(-1px);
}

.page-contact .type-pick[aria-pressed="true"] {
  background: var(--marker);
  border-color: var(--marker);
  color: var(--ink);
}

.page-contact .type-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 720px) {
  .page-contact .type-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .type-card:first-child {
    grid-column: 1 / -1;
  }
}

.page-contact .type-card {
  padding: 20px;
  background: var(--green-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .type-card:hover {
  border-color: var(--orange-soft);
  border-left-color: var(--marker);
  transform: translateY(-2px);
}

.page-contact .type-card__code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .type-card__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.26;
  color: var(--fg);
}

.page-contact .type-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--fg-muted);
}

.page-contact .type-card__need {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--orange-soft);
}

/* ---------- 02 表单字段 ---------- */

.page-contact .field-panel {
  padding: clamp(16px, 3vw, 28px);
  background: rgba(244, 241, 232, 0.05);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

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

.page-contact .field-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .field-list li:first-child {
  padding-top: 0;
}

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

@media (min-width: 620px) {
  .page-contact .field-list li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

.page-contact .field-list__name {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .field-list__hint {
  font-size: 15px;
  line-height: 1.72;
  color: var(--fg-muted);
}

.page-contact .hint-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 720px) {
  .page-contact .hint-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .hint {
  position: relative;
  padding: 14px 14px 14px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.68;
  color: var(--fg-muted);
}

.page-contact .hint::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 19px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-contact .hint--warn::before {
  background: var(--orange);
}

.page-contact .contact-form__note {
  margin-top: clamp(18px, 3vw, 28px);
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
}

/* ---------- 03 受理时段 ---------- */

.page-contact .timing {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

@media (min-width: 840px) {
  .page-contact .timing {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }
}

.page-contact .timing .media-frame {
  margin: 0;
}

.page-contact .timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-left: 1px solid var(--line-strong);
}

.page-contact .timeline li {
  position: relative;
  padding: 0 0 18px 20px;
}

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

.page-contact .timeline li::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

.page-contact .timeline__time {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--orange-soft);
}

.page-contact .timeline__text {
  display: block;
  margin-top: 3px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--fg-muted);
}

/* ---------- 04 合作投稿 ---------- */

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

@media (min-width: 800px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .coop-card {
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(35, 197, 214, 0.12), rgba(35, 197, 214, 0) 62%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .coop-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-contact .coop-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--fg);
}

.page-contact .coop-card__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-contact .material-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 660px) {
  .page-contact .material-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .material-list li {
  padding: 13px 15px;
  background: rgba(244, 241, 232, 0.04);
  border-left: 2px solid var(--cyan);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fg-muted);
}

.page-contact .material-list strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--fg);
}

.page-contact .contact-coop__note {
  margin-top: clamp(18px, 3vw, 26px);
}

/* ---------- 05 写法示例 ---------- */

.page-contact .sample-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 780px) {
  .page-contact .sample-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .sample-card {
  padding: 20px;
  background: var(--paper);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease);
}

.page-contact .sample-card:hover {
  transform: translateY(-2px);
}

.page-contact .sample-card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
}

.page-contact .sample-card__quote {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-contact .contact-final {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-strong);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fg-muted);
}

.page-contact .contact-final a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-contact .contact-final a:hover {
  color: var(--orange);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-contact .type-card:hover,
  .page-contact .coop-card:hover,
  .page-contact .sample-card:hover,
  .page-contact .type-pick:hover {
    transform: none;
  }
}