.page-contact {
  --co-rail: 330px;
  --co-gap: clamp(32px, 5vw, 64px);
  background: var(--paper-000);
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(30px, 4vw, 52px);
  background:
    radial-gradient(115% 85% at 100% 0%, rgba(47, 211, 164, .16), transparent 58%),
    linear-gradient(180deg, var(--mint-050) 0%, var(--paper-000) 82%);
  border-bottom: 1px solid var(--line-200);
}

.page-contact .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

.page-contact .hero-kicker {
  margin: 0;
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--mint-600);
  text-transform: uppercase;
}

.page-contact h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--ink-900);
}

.page-contact .hero-lede {
  max-width: 56ch;
  margin: 20px 0 0;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.8;
  color: var(--slate-500);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .hero-figure {
  margin: 0;
}

.page-contact .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 520;
  object-fit: cover;
  border: 1px solid var(--line-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-raised);
}

/* ---------- 双栏舞台 ---------- */

.page-contact .contact-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
  padding-top: clamp(36px, 5vw, 64px);
}

@media (min-width: 1024px) {
  .page-contact .contact-stage {
    grid-template-columns: var(--co-rail) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧联系面板 ---------- */

.page-contact .contact-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3vw, 32px);
  background: var(--ink-900);
  color: var(--paper-000);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-raised);
}

.page-contact .contact-panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(47, 211, 164, .34), transparent 66%);
  pointer-events: none;
}

@media (min-width: 1024px) {
  .page-contact .contact-panel {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
}

.page-contact .panel-kicker {
  margin: 0;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--mint-500);
}

.page-contact .panel-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.4vw, 1.65rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: #fff;
}

.page-contact .panel-note {
  margin: 14px 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(251, 249, 244, .74);
}

.page-contact .contact-list {
  position: relative;
  z-index: 1;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-item {
  display: grid;
  gap: 5px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(251, 249, 244, .14);
}

.page-contact .contact-item:first-child {
  border-top: 1px solid rgba(251, 249, 244, .14);
}

.page-contact .contact-key {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--mint-500);
}

.page-contact .contact-val {
  font-size: .9375rem;
  line-height: 1.62;
  color: #fff;
  overflow-wrap: anywhere;
}

.page-contact .contact-val.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .01em;
}

.page-contact .panel-rhythm {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed rgba(251, 249, 244, .22);
}

.page-contact .panel-rhythm p {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.78;
  color: rgba(251, 249, 244, .66);
}

.page-contact .rhythm-dot {
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--mint-500);
  box-shadow: 0 0 0 4px rgba(47, 211, 164, .2);
}

/* ---------- 正文列 ---------- */

.page-contact .contact-body {
  display: grid;
  gap: clamp(48px, 6vw, 80px);
  min-width: 0;
}

.page-contact .co-head {
  display: grid;
  gap: 10px;
  padding-bottom: 20px;
  margin-bottom: clamp(24px, 3vw, 34px);
  border-bottom: 1px solid var(--line-200);
}

.page-contact .co-index {
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--mint-600);
}

.page-contact .co-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink-900);
}

.page-contact .co-head p {
  margin: 0;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--slate-500);
}

/* ---------- 合作方式 ---------- */

.page-contact .track-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 900px) {
  .page-contact .track-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-contact .track-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 18px;
  background: var(--paper-100);
  border: 1px solid var(--line-200);
  border-top: 3px solid var(--mint-500);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
}

.page-contact .track-card--coral { border-top-color: var(--coral-500); }
.page-contact .track-card--amber { border-top-color: var(--amber-400); }

.page-contact .track-card h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-contact .track-card > p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.78;
  color: var(--slate-500);
}

.page-contact .track-more {
  margin-top: auto;
  border-top: 1px dashed var(--line-200);
  padding-top: 12px;
}

.page-contact .track-more > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink-700);
}

.page-contact .track-more > summary::-webkit-details-marker { display: none; }

.page-contact .track-more > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  line-height: 1;
  color: var(--mint-600);
}

.page-contact .track-more[open] > summary::after { content: "−"; }

.page-contact .track-more > p {
  margin: 10px 0 0;
  font-size: .8125rem;
  line-height: 1.78;
  color: var(--slate-500);
}

/* ---------- 准备清单 ---------- */

.page-contact .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-200);
}

.page-contact .prep-num {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--mint-600);
  padding-top: 4px;
}

.page-contact .prep-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: .9375rem;
  line-height: 1.5;
  color: var(--ink-900);
}

.page-contact .prep-item p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.78;
  color: var(--slate-500);
}

@media (min-width: 760px) {
  .page-contact .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .prep-item:nth-child(odd) {
    padding-right: 34px;
    border-right: 1px solid var(--line-200);
  }

  .page-contact .prep-item:nth-child(even) {
    padding-left: 34px;
  }
}

/* ---------- 四步流程 ---------- */

.page-contact .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-200);
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .flow-step {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 24px 22px 26px;
  background: var(--paper-100);
}

.page-contact .flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--mint-050);
  color: var(--mint-600);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.page-contact .flow-step h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-contact .flow-step p {
  margin: 0;
  font-size: .8438rem;
  line-height: 1.78;
  color: var(--slate-500);
}

.page-contact .flow-meta {
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-200);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--ink-700);
}

.page-contact .flow-figure {
  margin: clamp(24px, 3vw, 32px) 0 0;
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 420;
  object-fit: cover;
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  background: var(--night-800);
}

.page-contact .flow-figure figcaption {
  margin-top: 10px;
  font-size: .8125rem;
  letter-spacing: .02em;
  color: var(--slate-500);
}

/* ---------- 常见问题 ---------- */

.page-contact .faq-list {
  border-top: 1px solid var(--line-200);
}

.page-contact .faq-item {
  border-bottom: 1px solid var(--line-200);
}

.page-contact .faq-item > summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 20px 40px 20px 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: .9688rem;
  line-height: 1.6;
  color: var(--ink-900);
}

.page-contact .faq-item > summary::-webkit-details-marker { display: none; }

.page-contact .faq-item > summary::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--mint-600);
  border-bottom: 2px solid var(--mint-600);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 200ms var(--ease);
}

.page-contact .faq-item[open] > summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

.page-contact .faq-item > p {
  margin: 0;
  padding: 0 40px 22px 0;
  max-width: 68ch;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--slate-500);
}

/* ---------- 延伸入口 ---------- */

.page-contact .co-section--links {
  padding-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line-200);
}

.page-contact .links-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-contact .co-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-200);
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 700px) {
  .page-contact .co-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-contact .co-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .co-links a {
  display: block;
  height: 100%;
  padding: 20px 18px;
  background: var(--paper-100);
  text-decoration: none;
  transition: background-color 180ms var(--ease);
}

.page-contact .co-links a:hover {
  background: var(--mint-050);
}

.page-contact .co-links a:focus-visible {
  outline: 2px solid var(--mint-500);
  outline-offset: -2px;
}

.page-contact .links-name {
  display: block;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--ink-900);
}

.page-contact .links-desc {
  display: block;
  margin-top: 8px;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--slate-500);
}

/* ---------- 降低动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-links a,
  .page-contact .faq-item > summary::after {
    transition: none;
  }
}