.page-contact {
  --contact-rail-w: 320px;
  --contact-gap: clamp(28px, 5vw, 56px);
}

/* ---------- 首屏：斜向色块分层 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(34px, 8vw, 84px) 0 clamp(22px, 4vw, 44px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -30% -40% auto -40%;
  height: 155%;
  z-index: -1;
  background:
    linear-gradient(118deg, rgba(43, 240, 206, 0.2) 0%, rgba(43, 240, 206, 0) 55%),
    linear-gradient(298deg, rgba(255, 140, 59, 0.18) 0%, rgba(255, 140, 59, 0) 48%);
  clip-path: polygon(0 0, 100% 14%, 100% 56%, 0 88%);
  pointer-events: none;
}

.page-contact .contact-hero .anno {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .contact-hero__title {
  margin: clamp(10px, 2vw, 18px) 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-contact .contact-hero__title span {
  display: block;
  margin-left: 0.9em;
  color: var(--cyan);
}

.page-contact .contact-hero__lead {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.86);
}

.page-contact .contact-hero__meta {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-contact .contact-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(13, 42, 36, 0.62);
}

.page-contact .contact-hero__meta .num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

/* ---------- 主布局 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: var(--contact-gap);
  align-items: start;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .contact-main {
  display: grid;
  gap: clamp(38px, 6vw, 72px);
  min-width: 0;
}

.page-contact .contact-main > .section {
  padding: 0;
}

/* ---------- 左侧固定联系栏 ---------- */
.page-contact .contact-rail {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.page-contact .contact-rail::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(43, 240, 206, 0.32);
  border-radius: calc(var(--radius-lg) - 8px);
  pointer-events: none;
}

.page-contact .contact-rail__label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .contact-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-contact .contact-list__row {
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.page-contact .contact-list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .contact-list dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .contact-rail .note {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 章节标题组 ---------- */
.page-contact .chapter {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin-bottom: clamp(18px, 3vw, 28px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-contact .chapter__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(43, 240, 206, 0.75);
}

.page-contact .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-contact .chapter__sub {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .prose {
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.88);
}

.page-contact .prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(43, 240, 206, 0.4);
  text-underline-offset: 4px;
}

/* ---------- 图片容器 ---------- */
.page-contact .media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-contact .media__cap {
  display: block;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: rgba(6, 26, 22, 0.5);
}

/* ---------- 三条合作线 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .coop {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.page-contact .coop--a {
  border-top: 3px solid var(--cyan);
}

.page-contact .coop--b {
  border-top: 3px solid var(--orange);
}

.page-contact .coop--c {
  border-top: 3px solid var(--violet);
}

.page-contact .coop__head {
  display: block;
  list-style: none;
  cursor: pointer;
}

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

.page-contact .coop__head::after {
  content: "＋";
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
}

.page-contact .coop[open] .coop__head::after {
  content: "－";
  color: var(--muted);
}

.page-contact .coop__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .coop__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 24px);
  line-height: 1.2;
  color: var(--ink);
}

.page-contact .coop__who {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-contact .coop__brief {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(234, 246, 242, 0.8);
}

.page-contact .coop__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .coop__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.84);
}

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

.page-contact .coop__list li {
  padding-left: 16px;
  position: relative;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .coop__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
}

/* ---------- 四步流程 ---------- */
.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .flow__item {
  position: relative;
  padding: 0 0 28px 56px;
}

.page-contact .flow__item::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 34px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(23, 66, 58, 0.15));
}

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

.page-contact .flow__item:last-child::before {
  display: none;
}

.page-contact .flow__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border: 1px solid rgba(43, 240, 206, 0.6);
  border-radius: 50%;
  background: var(--bg);
}

.page-contact .flow__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .flow__body p {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.82);
}

/* ---------- 准备清单 ---------- */
.page-contact .prep {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .prep__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(234, 246, 242, 0.86);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-contact .prep__box {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  position: relative;
}

.page-contact .prep__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(42deg);
}

/* ---------- 响应时段 ---------- */
.page-contact .slots {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .slot {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--panel), rgba(13, 42, 36, 0.42));
}

.page-contact .slot--peak {
  border-color: rgba(255, 140, 59, 0.45);
  background: linear-gradient(160deg, rgba(255, 140, 59, 0.12), rgba(13, 42, 36, 0.5));
}

.page-contact .slot__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .slot__big {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-contact .slot--peak .slot__big {
  color: var(--orange);
}

.page-contact .slot p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.82);
}

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

/* ---------- 常见场景 ---------- */
.page-contact .scenes {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .scene {
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--teal);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-contact .scene__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .scene p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.82);
}

.page-contact .scene__link {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 206, 0.45);
  padding-bottom: 2px;
}

.page-contact .scene__link:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-contact .next {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(43, 240, 206, 0.08), rgba(6, 26, 22, 0));
}

.page-contact .next__text {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(234, 246, 242, 0.86);
}

.page-contact .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .coop--a {
    min-height: 296px;
  }

  .page-contact .coop--b {
    min-height: 344px;
  }

  .page-contact .coop--c {
    min-height: 264px;
  }

  .page-contact .prep {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-layout {
    grid-template-columns: var(--contact-rail-w) minmax(0, 1fr);
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 96px;
  }

  .page-contact .contact-hero__title {
    max-width: 24ch;
  }
}