.page-contact {
  --contact-gap: clamp(16px, 3vw, 28px);
  --contact-cut: 18px;
  background: var(--kg-white);
  color: var(--kg-seed);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(56px, 9vw, 96px);
  background: var(--kg-mist);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(36px, 6vw, 64px);
  background: var(--kg-white);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-contact .contact-hero .shell {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero h1 {
  margin: 18px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-contact .contact-lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-rind);
}

.page-contact .contact-h2 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* ---------- 三条通道 ---------- */
.page-contact .contact-channels {
  padding-top: clamp(8px, 2vw, 20px);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 32px 22px 26px;
  background: var(--kg-white);
  box-shadow: 0 0 0 1px var(--kg-porcelain);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--channel-accent, var(--kg-lime));
}

.page-contact .channel--lime { --channel-accent: var(--kg-lime); }
.page-contact .channel--gold { --channel-accent: var(--kg-gold); }
.page-contact .channel--teal { --channel-accent: var(--kg-teal); }

.page-contact .channel:hover {
  transform: translateY(-4px);
  background: var(--kg-mist);
}

.page-contact .channel__label {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--kg-moss);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(19px, 5.2vw, 23px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--kg-seed);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel__value--text {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
}

.page-contact .channel__desc {
  margin: 4px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-contact .channel__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--kg-porcelain);
  font-size: 14px;
  line-height: 1.6;
  color: var(--kg-lime-deep);
}

/* ---------- 问题类型路由 ---------- */
.page-contact .router-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 26px;
  padding: 0;
}

.page-contact .router-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .router-row {
  padding: 20px 22px;
  background: var(--kg-white);
  border-left: 4px solid var(--kg-porcelain);
  transition: background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-contact .router-row h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.page-contact .router-row p {
  margin: 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .router-row a {
  color: var(--kg-lime-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .channel-router:has(#pick-filter[aria-pressed="true"]) .router-row--filter,
.page-contact .channel-router:has(#pick-subscribe[aria-pressed="true"]) .router-row--subscribe,
.page-contact .channel-router:has(#pick-data[aria-pressed="true"]) .router-row--data,
.page-contact .channel-router:has(#pick-fix[aria-pressed="true"]) .router-row--fix,
.page-contact .channel-router:has(#pick-coop[aria-pressed="true"]) .router-row--coop {
  border-left-color: var(--kg-lime);
  box-shadow: inset 0 0 0 1px var(--kg-lime);
}

/* ---------- 提问准备 ---------- */
.page-contact .prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 52px);
  align-items: start;
}

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

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

.page-contact .prep-body {
  min-width: 0;
}

.page-contact .prep-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: prep;
}

.page-contact .prep-list > li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.page-contact .prep-list__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 2px solid var(--kg-lime-deep);
  background: var(--kg-mist);
  color: var(--kg-rind);
  font-family: var(--font-num);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.page-contact .prep-list__mark::before {
  counter-increment: prep;
  content: counter(prep, decimal-leading-zero);
}

.page-contact .prep-list__text {
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .prep-list__text strong {
  display: block;
  font-weight: 800;
  color: var(--kg-rind);
}

/* ---------- 合作与纠错 ---------- */
.page-contact .collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .collab-card {
  padding: 28px 24px 30px;
  background: var(--kg-white);
  border-top: 6px solid var(--kg-lime-deep);
  box-shadow: 0 0 0 1px var(--kg-porcelain);
}

.page-contact .collab-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.page-contact .collab-card p {
  margin: 0 0 12px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
}

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

/* ---------- 回复节奏 ---------- */
.page-contact .reply-time .contact-h2 {
  color: var(--kg-white);
}

.page-contact .reply-time__lead {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-mist);
}

.page-contact .reply-time a {
  color: var(--kg-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .reply-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  margin-top: clamp(24px, 4vw, 40px);
  padding: 24px;
  background: var(--kg-white);
  color: var(--kg-seed);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-contact .reply-card__body h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
}

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

.page-contact .reply-card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .reply-card__list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--kg-lime);
}

.page-contact .reply-card__list a {
  color: var(--kg-lime-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .reply-card__figure {
  margin: 0;
}

/* ---------- 桌面 ---------- */
@media (min-width: 860px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .reply-card {
    grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
    padding: 32px;
  }
}

@media (min-width: 900px) {
  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
  }
}
<<<END>>>