.page-contact {
  --cp-gap: clamp(26px, 4vw, 52px);
  --cp-pad: clamp(18px, 3vw, 34px);
  --cp-radius: 4px;
  --cp-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  display: grid;
  overflow: hidden;
  background: var(--ink-night);
  min-height: clamp(380px, 56vw, 580px);
}

.page-contact .contact-hero__media {
  grid-area: 1 / 1;
  z-index: 0;
  position: relative;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(7, 11, 26, 0.34) 0%,
    rgba(7, 11, 26, 0.66) 46%,
    var(--ink-night) 100%
  );
}

.page-contact .contact-hero__body {
  grid-area: 1 / 1;
  z-index: 2;
  align-self: end;
  padding-top: clamp(88px, 16vw, 170px);
  padding-bottom: clamp(26px, 4vw, 52px);
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .crumbs span[aria-current] {
  color: var(--text-hi);
}

.page-contact .contact-hero h1 {
  margin: 0 0 16px;
  max-width: 17em;
  font-family: var(--font-h);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}

.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 48em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 渠道与清单 ---------- */
.page-contact .contact-desk {
  background: var(--stand-blue);
  padding: clamp(44px, 6vw, 78px) 0 clamp(34px, 5vw, 60px);
}

.page-contact .contact-desk .h-sec {
  margin: 0 0 12px;
}

.page-contact .contact-desk__lede {
  margin: 0 0 clamp(26px, 3.6vw, 44px);
  max-width: 52em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .contact-desk__inner {
  display: grid;
  gap: var(--cp-gap);
}

/* 渠道卡片 */
.page-contact .channel {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 20px clamp(18px, 2.4vw, 26px) 20px clamp(20px, 2.6vw, 30px);
  background: var(--track-blue);
  border-radius: var(--cp-radius);
  border: 1px solid var(--hair);
}

.page-contact .channel + .channel {
  margin-top: 16px;
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--cyan);
  opacity: 0.85;
}

.page-contact .channel__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-contact .channel .status-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 214, 0.14);
}

.page-contact .channel__name {
  margin: 0;
  font-family: var(--font-h);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-contact .channel__tag {
  margin-left: auto;
}

.page-contact .channel__value {
  margin: 0;
  word-break: break-word;
  color: #FFFFFF;
}

.page-contact .channel__value--code {
  font-family: var(--font-num);
  font-size: clamp(21px, 2.8vw, 28px);
  font-weight: 600;
  letter-spacing: 0.035em;
  line-height: 1.24;
}

.page-contact .channel__value--addr {
  font-family: var(--cp-mono);
  font-size: clamp(15px, 1.7vw, 18px);
  letter-spacing: 0.01em;
  line-height: 1.6;
  color: var(--text-hi);
}

.page-contact .channel__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .channel__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

.page-contact .copy-btn {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--hair-strong);
  border-radius: 2px;
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-contact .copy-btn:hover {
  border-color: var(--cyan);
  background: rgba(34, 224, 214, 0.08);
}

.page-contact .copy-btn[data-copy-state="done"] {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--ink-night);
}

.page-contact .disclosure-btn {
  min-height: 44px;
  padding: 0 2px;
  border: 0;
  border-bottom: 1px solid var(--hair-strong);
  background: none;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

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

.page-contact .disclosure-panel {
  padding-top: 8px;
  border-top: 1px dashed var(--hair);
}

.page-contact .disclosure-panel p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--mist);
}

/* 检查清单 */
.page-contact .checklist {
  padding: var(--cp-pad);
  border: 1px solid var(--hair);
  border-top: 2px solid var(--cyan);
  border-radius: var(--cp-radius);
  background: rgba(7, 11, 26, 0.55);
}

.page-contact .checklist__label {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .checklist__title {
  margin: 0 0 8px;
  font-family: var(--font-h);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-contact .checklist__note {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .checklist__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px dashed var(--hair);
}

.page-contact .checklist__item input[type="checkbox"] {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--hair-strong);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
}

.page-contact .checklist__item input[type="checkbox"]:checked {
  border-color: var(--cyan);
  background: rgba(34, 224, 214, 0.14);
}

.page-contact .checklist__item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(42deg);
}

.page-contact .checklist__item label {
  display: block;
  cursor: pointer;
}

.page-contact .checklist__k {
  display: block;
  margin-bottom: 3px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-contact .checklist__v {
  display: block;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
  transition: color 0.22s var(--ease);
}

.page-contact .checklist__item input[type="checkbox"]:checked + label .checklist__v {
  color: var(--text-hi);
}

.page-contact .checklist__item input[type="checkbox"]:focus-visible,
.page-contact .copy-btn:focus-visible,
.page-contact .disclosure-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 服务时段 ---------- */
.page-contact .contact-hours {
  background: var(--stand-blue);
  padding: 0 0 clamp(46px, 6vw, 82px);
}

.page-contact .service-band {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--hair);
  border-radius: var(--cp-radius);
  background: var(--ink-night);
}

.page-contact .service-band__clock {
  min-width: 0;
}

.page-contact .clock {
  position: relative;
  height: 52px;
  border-bottom: 1px solid var(--hair-strong);
  background-image: repeating-linear-gradient(
    90deg,
    var(--hair-strong) 0 1px,
    transparent 1px 4.1667%
  );
}

.page-contact .clock__window {
  position: absolute;
  left: 37.5%;
  top: 0;
  bottom: 0;
  width: 37.5%;
  border-left: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  background: linear-gradient(180deg, rgba(34, 224, 214, 0.3), rgba(34, 224, 214, 0));
}

.page-contact .clock__axis {
  display: flex;
  justify-content: space-between;
  gap: 4px;
  margin-top: 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .service-band__title {
  margin: 0 0 12px;
  font-family: var(--font-h);
  font-size: clamp(21px, 2.2vw, 28px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-contact .service-band__text p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .service-band__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0 !important;
}

.page-contact .service-band__links .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  text-decoration: none;
}

/* ---------- 提交建议 ---------- */
.page-contact .contact-advice {
  position: relative;
  background: var(--ink-night);
  padding: clamp(48px, 7vw, 88px) 0;
  border-top: 1px solid var(--hair);
}

.page-contact .contact-advice::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  transform: skewY(-0.6deg);
  background: linear-gradient(90deg, transparent, var(--cyan) 18%, rgba(34, 224, 214, 0.18) 62%, transparent);
}

.page-contact .advice__grid {
  display: grid;
  gap: var(--cp-gap);
}

.page-contact .advice__lead h2 {
  margin: 10px 0 14px;
}

.page-contact .advice__lead p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .advice__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .advice-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num text";
  column-gap: 14px;
  row-gap: 4px;
  padding: 18px clamp(16px, 2vw, 22px);
  border-left: 1px solid var(--hair-strong);
  background: linear-gradient(90deg, rgba(22, 35, 74, 0.7), rgba(22, 35, 74, 0));
}

.page-contact .advice-step__num {
  grid-area: num;
  align-self: start;
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-contact .advice-step b {
  grid-area: title;
  font-family: var(--font-h);
  font-size: 16px;
  color: var(--text-hi);
}

.page-contact .advice-step span:not(.advice-step__num) {
  grid-area: text;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 提交前准备 ---------- */
.page-contact .contact-prep {
  background: var(--ink-night);
  padding: clamp(48px, 7vw, 88px) 0;
  border-top: 1px solid var(--hair);
}

.page-contact .prep__grid {
  display: grid;
  gap: var(--cp-gap);
}

.page-contact .prep__text h2 {
  margin: 10px 0 22px;
}

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

.page-contact .prep__row {
  display: grid;
  gap: 5px;
  padding: 15px 0;
  border-top: 1px solid var(--hair);
}

.page-contact .prep__row:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-contact .prep__row dt {
  font-family: var(--font-h);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-contact .prep__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

.page-contact .prep__figure {
  margin: 0;
  align-self: start;
}

/* ---------- 常见场景 ---------- */
.page-contact .contact-cases {
  background: var(--ink-night);
  padding: clamp(48px, 7vw, 88px) 0;
  border-top: 1px solid var(--hair);
}

.page-contact .contact-cases h2 {
  margin: 10px 0 28px;
}

.page-contact .cases__grid {
  display: grid;
  gap: 18px;
}

.page-contact .case-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--track-blue);
  border-radius: var(--cp-radius);
  border: 1px solid var(--hair);
}

.page-contact .case-card .tag {
  justify-self: start;
}

.page-contact .case-card h3 {
  margin: 0;
  font-family: var(--font-h);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-contact .case-card p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 合作与纠错（暖纸断面） ---------- */
.page-contact .contact-coop {
  background: var(--paper);
  color: var(--ink-black);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-contact .coop__label {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--deep-teal);
}

.page-contact .coop__title {
  margin: 0 0 30px;
  max-width: 22em;
  font-family: var(--font-h);
  font-size: clamp(22px, 2.6vw, 34px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink-black);
}

.page-contact .coop__cols {
  display: grid;
  gap: 26px;
}

.page-contact .coop__col {
  padding-top: 16px;
  border-top: 2px solid var(--ink-black);
}

.page-contact .coop__col h3 {
  margin: 0 0 8px;
  font-family: var(--font-h);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-black);
}

.page-contact .coop__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-gray);
}

.page-contact .coop__mail {
  margin: 32px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper-gray);
}

.page-contact .coop__mail b {
  font-family: var(--font-num);
  font-size: 19px;
  letter-spacing: 0.03em;
  color: var(--ink-black);
  word-break: break-word;
}

.page-contact .coop__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(18, 20, 28, 0.18);
  font-size: 14.5px;
}

.page-contact .coop__links a {
  color: var(--deep-teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-contact .coop__links a:hover {
  color: var(--ink-black);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .cases__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .coop__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-desk__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .service-band {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
    align-items: center;
  }

  .page-contact .advice__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    align-items: start;
  }

  .page-contact .prep__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .cases__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-contact .channel__actions {
    gap: 8px;
  }

  .page-contact .copy-btn {
    padding: 0 14px;
    font-size: 12px;
  }

  .page-contact .clock__axis {
    font-size: 10px;
  }

  .page-contact .coop__mail b {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .crumbs a,
  .page-contact .copy-btn,
  .page-contact .disclosure-btn,
  .page-contact .checklist__v {
    transition-duration: 120ms;
  }
}