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

.page-contact {
  --contact-hairline: rgba(242, 244, 238, .14);
  --contact-tick: 3px 3px 0 rgba(7, 18, 15, .85);
}

.page-contact .section {
  padding-block: clamp(46px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero__lead {
  max-width: 50ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .contact-hero__media {
  margin: clamp(30px, 6vw, 54px) 0 0;
}

/* ---------- 01 三种对接场景 ---------- */

.page-contact .contact-scenes__grid {
  display: grid;
  gap: 20px;
  margin-top: clamp(26px, 4vw, 44px);
}

@media (min-width: 870px) {
  .page-contact .contact-scenes__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-contact .scene {
  min-width: 0;
  border: 2px solid var(--line);
  background: rgba(14, 59, 46, .05);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .scene:hover,
.page-contact .scene[open] {
  border-color: var(--green-deep);
  box-shadow: var(--shadow-hard);
}

.page-contact .scene__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "no name mark"
    "no hint mark";
  column-gap: 14px;
  row-gap: 6px;
  align-items: start;
  padding: 22px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .scene__summary::marker {
  content: "";
}

.page-contact .scene__summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}

.page-contact .scene__no {
  grid-area: no;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .08em;
  color: var(--flag);
}

.page-contact .scene__name {
  grid-area: name;
  font-size: clamp(19px, 3.2vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .scene__hint {
  grid-area: hint;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mono-gray);
}

.page-contact .scene__summary::after {
  content: "+";
  grid-area: mark;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--flag);
}

.page-contact .scene[open] .scene__summary::after {
  content: "−";
}

.page-contact .scene__body {
  padding: 18px 20px 24px;
  border-top: 1px solid var(--line);
}

.page-contact .scene__body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-contact .scene__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .scene__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .scene__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 7px;
  background: var(--blue);
}

/* ---------- 02 联系信息 + 03 回复节奏 ---------- */

.page-contact .contact-reach__grid {
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  margin-top: clamp(26px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-contact .contact-reach__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-contact .contact-rows {
  min-width: 0;
  margin: 0;
}

.page-contact .contact-row {
  display: grid;
  gap: 7px;
  min-width: 0;
  padding: 20px 0;
  border-top: 1px solid var(--contact-hairline);
}

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

.page-contact .contact-row__key {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--blue);
}

.page-contact .contact-row__value {
  display: grid;
  gap: 7px;
  min-width: 0;
  margin: 0;
}

.page-contact .contact-row__strong {
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .contact-row__note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-cadence {
  border: 2px solid var(--flag);
  padding: clamp(22px, 4vw, 32px);
  background: rgba(255, 90, 43, .07);
  box-shadow: var(--shadow-soft);
}

.page-contact .contact-cadence__index {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--flag);
}

.page-contact .contact-cadence__title {
  margin: 12px 0 16px;
  font-size: clamp(20px, 3vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .contact-cadence__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-cadence__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-cadence__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 2px;
  background: var(--flag);
}

.page-contact .contact-reach__privacy {
  margin: clamp(28px, 4vw, 40px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-reach__privacy a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 04 提交前的三项准备 ---------- */

.page-contact .contact-prep__grid {
  display: grid;
  gap: clamp(30px, 5vw, 50px);
  margin-top: clamp(26px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-contact .contact-prep__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-contact .checklist {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .checklist__box {
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 2px solid var(--green-deep);
  background: var(--paper);
  box-shadow: var(--contact-tick);
}

.page-contact .checklist__text {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-contact .checklist__text strong {
  font-weight: 700;
  color: var(--green-deep);
}

.page-contact .contact-prep__media {
  margin: 0;
}

.page-contact .contact-prep__links {
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding-top: 22px;
  border-top: 2px solid var(--line);
  font-size: 16px;
  line-height: 2;
  color: var(--ink);
}

.page-contact .contact-prep__links a {
  color: var(--green-deep);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-contact .contact-prep__links a:hover {
  color: var(--blue);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .scene {
    transition: none;
  }
}