.page-contact {
  --c-pad: clamp(20px, 5vw, 48px);
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-sans);
}

/* ---------- 面包屑 ---------- */
.page-contact .c-breadcrumb {
  padding: 14px 0 0;
}
.page-contact .c-breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}
.page-contact .c-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-contact .c-breadcrumb li + li::before {
  content: "／";
  color: var(--graphite);
  opacity: 0.6;
}
.page-contact .c-breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--t), border-color var(--t);
}
.page-contact .c-breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-contact .c-breadcrumb li[aria-current] {
  color: var(--signal);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */
.page-contact .c-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper-lite);
  padding: 0 0 clamp(48px, 8vw, 96px);
}
.page-contact .c-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -15%;
  width: 70%;
  height: 130%;
  background:
    repeating-linear-gradient(
      115deg,
      rgba(31, 211, 232, 0.08) 0 2px,
      transparent 2px 22px
    );
  pointer-events: none;
}
.page-contact .c-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--lava) 0%, var(--signal) 45%, var(--cyan) 100%);
}

.page-contact .c-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  padding-top: clamp(28px, 4vw, 44px);
}

.page-contact .c-eyebrow-on-dark {
  color: var(--signal);
  border-color: var(--lava);
}
.page-contact .c-eyebrow-on-dark::before {
  background: var(--lava);
}

.page-contact .c-hero__h1 {
  margin: 16px 0 20px;
  color: var(--paper-lite);
  font-size: clamp(28px, 6.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-contact .c-hero__lead {
  max-width: 44ch;
  color: rgba(243, 235, 221, 0.84);
  font-size: var(--fs-17);
  line-height: 1.78;
  margin: 0;
}

.page-contact .c-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .c-btn-on-dark {
  border-color: var(--paper-lite);
  color: var(--paper-lite);
}
.page-contact .c-btn-on-dark:hover {
  background: var(--paper-lite);
  color: var(--ink);
}

.page-contact .c-hero__quicklinks {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
}
.page-contact .c-hero__quicklabel {
  color: var(--mist);
  letter-spacing: 0.04em;
}
.page-contact .c-hero__quicklinks a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 197, 49, 0.4);
  padding-bottom: 2px;
  transition: border-color var(--t), color var(--t);
}
.page-contact .c-hero__quicklinks a:hover {
  color: var(--lava);
  border-bottom-color: var(--lava);
}

.page-contact .c-hero__visual {
  position: relative;
  border: 3px solid var(--lava);
  background: var(--ink-deep);
  box-shadow: 10px 10px 0 rgba(255, 90, 31, 0.32);
  overflow: hidden;
}
.page-contact .c-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .c-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  background: var(--ink);
  color: var(--signal);
  border-top: 2px solid var(--lava);
  border-right: 2px solid var(--lava);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
}
.page-contact .c-hero__cross {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
}
.page-contact .c-hero__cross::before,
.page-contact .c-hero__cross::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}
.page-contact .c-hero__cross::before {
  top: 15px;
  left: -8px;
  width: 50px;
  height: 2px;
}
.page-contact .c-hero__cross::after {
  left: 15px;
  top: -8px;
  width: 2px;
  height: 50px;
}

/* ---------- 通用章节头 ---------- */
.page-contact .c-section-head {
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 48px);
}
.page-contact .c-section-head__note {
  margin: 16px 0 0;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--graphite);
  max-width: 46ch;
}
.page-contact .c-section-head__note--on-dark {
  color: rgba(243, 235, 221, 0.74);
}
.page-contact .c-h2-on-dark {
  color: var(--paper-lite);
}

/* ---------- 三条通道 ---------- */
.page-contact .c-channels {
  background: var(--paper);
}

.page-contact .c-channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .c-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 24px;
  background: var(--paper-lite);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
  transition: transform var(--t), box-shadow var(--t);
}
.page-contact .c-channel:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-hover);
}
.page-contact .c-channel::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 26px;
  height: 6px;
}
.page-contact .c-channel--mail::before { background: var(--lava); }
.page-contact .c-channel--phone::before { background: var(--cyan); }
.page-contact .c-channel--entry::before { background: var(--signal); }

.page-contact .c-channel__idx {
  align-self: flex-start;
  padding: 4px 10px;
  background: var(--ink);
  color: var(--paper-lite);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.14em;
}
.page-contact .c-channel--mail .c-channel__idx { background: var(--lava); }
.page-contact .c-channel--phone .c-channel__idx { background: var(--cyan-deep); }
.page-contact .c-channel--entry .c-channel__idx { background: var(--graphite); }

.page-contact .c-channel .bd-h3 {
  margin: 4px 0 0;
  color: var(--ink);
}
.page-contact .c-channel__desc {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.72;
  color: var(--graphite);
}
.page-contact .c-channel__meta {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--graphite);
}
.page-contact .c-channel__meta li {
  padding-left: 14px;
  position: relative;
}
.page-contact .c-channel__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 6px;
  height: 2px;
  background: var(--mist);
}
.page-contact .c-channel__val {
  display: block;
  margin-top: auto;
  padding-top: 16px;
  border-top: 2px solid var(--mist);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--lava-deep);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
  transition: color var(--t);
}
.page-contact .c-channel__val:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应时间 ---------- */
.page-contact .c-response {
  position: relative;
  background: var(--ink);
  color: var(--paper-lite);
  padding: clamp(52px, 8vw, 100px) 0 clamp(64px, 9vw, 112px);
}
.page-contact .c-response::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(36px, 5vw, 56px);
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}
.page-contact .c-response::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--lava), var(--cyan), transparent);
}

.page-contact .c-response__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 52px);
  align-items: start;
}
.page-contact .c-response__text .bd-h2 {
  color: var(--paper-lite);
  margin: 14px 0 0;
}
.page-contact .c-response__text p {
  margin: 16px 0 0;
  max-width: 44ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: rgba(243, 235, 221, 0.82);
}

.page-contact .c-response__stats {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}
.page-contact .c-response__stat {
  padding: 16px 16px 14px;
  border: 2px solid rgba(243, 235, 221, 0.2);
  background: rgba(243, 235, 221, 0.04);
}
.page-contact .c-response__num {
  display: block;
  font-size: var(--fs-30);
  font-weight: 700;
  color: var(--signal);
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.page-contact .c-response__unit {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .c-response__figure {
  margin: 0;
  border: 3px solid var(--cyan);
  background: var(--ink-deep);
  box-shadow: 10px 10px 0 rgba(31, 211, 232, 0.24);
  overflow: hidden;
}
.page-contact .c-response__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .c-response__figure figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

/* ---------- 提交前准备 ---------- */
.page-contact .c-prepare {
  background: var(--paper);
}
.page-contact .c-prepare__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-contact .c-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-contact .c-checklist li {
  background: var(--paper-lite);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(10, 26, 51, 0.13);
}
.page-contact .c-checklist label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  font-size: var(--fs-17);
  line-height: 1.7;
}
.page-contact .c-checklist input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  border: 2px solid var(--ink);
  background: var(--paper-lite);
  position: relative;
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.page-contact .c-checklist input[type="checkbox"]:checked {
  background: var(--lava);
  border-color: var(--lava);
}
.page-contact .c-checklist input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 12px;
  border: solid var(--paper-lite);
  border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}
.page-contact .c-checklist input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-contact .c-checklist__txt strong {
  font-weight: 900;
  color: var(--ink);
}

.page-contact .c-prepare__aside {
  align-self: start;
  background: var(--paper-lite);
  border: 2px solid var(--ink);
  border-top: 5px solid var(--lava);
  padding: 24px 22px 26px;
  box-shadow: var(--shadow-hard);
}
.page-contact .c-prepare__aside .bd-h3 {
  margin: 0;
  color: var(--ink);
}
.page-contact .c-prepare__aside .bd-h3 + p {
  margin: 12px 0 0;
}
.page-contact .c-prepare__aside .bd-h3:not(:first-child) {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 2px dashed var(--mist);
}
.page-contact .c-prepare__aside p {
  font-size: var(--fs-17);
  line-height: 1.72;
  color: var(--graphite);
}
.page-contact .c-aside-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--lava-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--lava-deep);
  padding-bottom: 2px;
  transition: color var(--t), border-color var(--t);
}
.page-contact .c-aside-link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- 纠错流程 ---------- */
.page-contact .c-correct {
  background: var(--paper-lite);
  border-top: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
}
.page-contact .c-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-contact .c-flow__item {
  position: relative;
  padding: 26px 20px 22px;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(10, 26, 51, 0.14);
}
.page-contact .c-flow__item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 6px;
  height: 46px;
  background: var(--lava);
}
.page-contact .c-flow__no {
  display: block;
  font-size: var(--fs-30);
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.02em;
}
.page-contact .c-flow__item .bd-h3 {
  margin: 14px 0 8px;
  color: var(--ink);
}
.page-contact .c-flow__item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--graphite);
}
.page-contact .c-correct__foot {
  margin: 30px 0 0;
  padding-left: 16px;
  border-left: 4px solid var(--cyan);
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--graphite);
  max-width: 58ch;
}

/* ---------- 合作对接 ---------- */
.page-contact .c-coop {
  background: var(--ink-deep);
  color: var(--paper-lite);
  padding: clamp(48px, 7vw, 90px) 0 clamp(44px, 6vw, 76px);
}
.page-contact .c-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-contact .c-coop__card {
  padding: 24px 22px 26px;
  border: 2px solid rgba(199, 192, 178, 0.45);
  background: rgba(243, 235, 221, 0.04);
  transition: border-color var(--t), transform var(--t), background var(--t);
}
.page-contact .c-coop__card:hover {
  border-color: var(--lava);
  background: rgba(255, 90, 31, 0.06);
  transform: translateY(-2px);
}
.page-contact .c-coop__tag {
  font-family: var(--font-mono);
}
.page-contact .c-coop__card .bd-h3 {
  margin: 14px 0 10px;
  color: var(--paper-lite);
}
.page-contact .c-coop__card p {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.76;
  color: rgba(243, 235, 221, 0.78);
}
.page-contact .c-coop__note {
  margin: 32px 0 0;
  padding: 6px 0 6px 16px;
  border-left: 4px solid var(--lava);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

/* ---------- 备案信息 ---------- */
.page-contact .c-region {
  background: var(--ink);
  border-top: 4px solid var(--lava);
  padding: 18px 0 22px;
}
.page-contact .c-region__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  align-items: baseline;
}
.page-contact .c-region__cell {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  line-height: 1.6;
}
.page-contact .c-region__cell--wide {
  flex: 1 1 100%;
}
.page-contact .c-region__k {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--signal);
  font-weight: 700;
  text-transform: uppercase;
}
.page-contact .c-region__k::before {
  content: "";
  width: 3px;
  height: 11px;
  background: var(--lava);
}
.page-contact .c-region__v {
  color: var(--paper-lite);
  overflow-wrap: anywhere;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-contact .c-channel-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .c-coop__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .c-flow {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .c-hero__grid {
    grid-template-columns: 1.12fr 1fr;
    align-items: center;
    gap: clamp(40px, 5vw, 70px);
  }
  .page-contact .c-response__grid {
    grid-template-columns: 1fr 1.05fr;
    align-items: center;
    gap: clamp(40px, 5vw, 64px);
  }
  .page-contact .c-prepare__grid {
    grid-template-columns: 1.4fr 1fr;
    gap: 44px;
  }
}

@media (min-width: 1040px) {
  .page-contact .c-flow {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 420px) {
  .page-contact .c-channel__desc,
  .page-contact .c-channel__meta,
  .page-contact .c-channel__val {
    font-size: var(--fs-14);
  }
  .page-contact .c-response__num {
    font-size: var(--fs-22);
  }
  .page-contact .c-flow__no {
    font-size: var(--fs-22);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-channel,
  .page-contact .c-coop__card,
  .page-contact .c-channel__val,
  .page-contact .c-aside-link,
  .page-contact .c-hero__quicklinks a {
    transition: none;
  }
  .page-contact .c-channel:hover,
  .page-contact .c-coop__card:hover {
    transform: none;
  }
}