.page-contact {
  --ct-notch: 22px;
  --ct-line: rgba(30, 93, 156, 0.16);
  display: block;
  background: var(--yx-mist);
  color: var(--yx-ink);
  font-family: var(--yx-sans);
  overflow-x: hidden;
}

.page-contact .yx-section {
  max-width: var(--yx-shell);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 80px) var(--yx-gutter);
}

/* ---------- 面包屑 ---------- */
.page-contact .yx-crumbs {
  max-width: var(--yx-shell);
  margin: 0 auto;
  padding: 20px var(--yx-gutter) 0;
  font-family: var(--yx-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .yx-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--yx-gray);
}

.page-contact .yx-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--yx-silver);
}

.page-contact .yx-crumbs a {
  color: var(--yx-blue);
  text-decoration: none;
}

.page-contact .yx-crumbs a:hover {
  color: var(--yx-orange);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-intro {
  position: relative;
  max-width: var(--yx-shell);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 60px) var(--yx-gutter) clamp(20px, 3vw, 32px);
  overflow: hidden;
}

.page-contact .ct-intro::before {
  content: "";
  position: absolute;
  inset: 0 var(--yx-gutter);
  background:
    radial-gradient(120% 90% at 94% 0%, rgba(74, 143, 212, 0.18), transparent 62%),
    radial-gradient(70% 80% at 0% 100%, rgba(255, 122, 24, 0.09), transparent 64%);
  pointer-events: none;
}

.page-contact .ct-intro > * {
  position: relative;
  z-index: 1;
}

.page-contact .ct-intro__tag {
  margin: 0 0 14px;
  font-family: var(--yx-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--yx-orange);
}

.page-contact .ct-intro__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(28px, 4.4vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--yx-deep);
}

.page-contact .ct-intro__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.78;
  color: var(--yx-gray);
}

.page-contact .ct-intro__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--yx-silver);
}

.page-contact .ct-intro__facts li {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding: 15px 0;
  border-bottom: 1px solid var(--yx-silver);
}

.page-contact .ct-num {
  font-family: var(--yx-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--yx-orange);
}

.page-contact .ct-unit {
  font-size: 14px;
  font-weight: 600;
  color: var(--yx-mid);
}

.page-contact .ct-intro__facts em {
  font-style: normal;
  font-size: 14px;
  color: var(--yx-gray);
}

/* ---------- 提交需求 ---------- */
.page-contact .ct-submit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 28px;
}

.page-contact .ct-form {
  position: relative;
  padding: 24px 20px 26px;
  background: #fff;
  border: 1px solid var(--yx-silver);
  clip-path: polygon(0 0, calc(100% - var(--ct-notch)) 0, 100% var(--ct-notch), 100% 100%, 0 100%);
}

.page-contact .ct-field {
  margin-bottom: 16px;
}

.page-contact .ct-field__label {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--yx-mid);
}

.page-contact .ct-input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding: 11px 13px;
  font-family: var(--yx-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--yx-ink);
  background: var(--yx-mist);
  border: 1px solid var(--yx-silver);
  border-radius: 0;
  transition: border-color 0.2s var(--yx-ease), background 0.2s var(--yx-ease), box-shadow 0.2s var(--yx-ease);
}

.page-contact .ct-input--area {
  min-height: 96px;
  resize: vertical;
}

.page-contact .ct-input::placeholder {
  color: #93a4b4;
}

.page-contact .ct-input:focus {
  outline: none;
  background: #fff;
  border-color: var(--yx-bright);
  box-shadow: 0 0 0 3px rgba(74, 143, 212, 0.18);
}

.page-contact .ct-form__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed var(--yx-silver);
}

.page-contact .ct-form__submit {
  width: 100%;
  justify-content: center;
}

.page-contact .ct-form__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--yx-gray);
}

.page-contact .ct-submit__side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-contact .ct-shot {
  margin: 0;
}

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

.page-contact .ct-checks {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 3px solid var(--yx-orange);
}

.page-contact .ct-checks li {
  position: relative;
  padding: 0 0 12px 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--yx-mid);
}

.page-contact .ct-checks li:last-child {
  padding-bottom: 0;
}

.page-contact .ct-checks li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--yx-bright);
  transform: rotate(45deg);
}

/* ---------- 响应节奏 ---------- */
.page-contact .ct-rhythm {
  position: relative;
  background: linear-gradient(180deg, rgba(215, 227, 239, 0.42), rgba(244, 247, 250, 0));
}

.page-contact .ct-rhythm__list {
  margin: 30px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 2px solid var(--yx-silver);
}

.page-contact .ct-rhythm__item {
  position: relative;
  padding-bottom: 30px;
}

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

.page-contact .ct-rhythm__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--yx-orange);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-contact .ct-rhythm__tick {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--yx-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--yx-orange);
}

.page-contact .ct-rhythm__head {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 700;
  color: var(--yx-deep);
}

.page-contact .ct-rhythm__item p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--yx-gray);
}

/* ---------- 选型建议 ---------- */
.page-contact .ct-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--ct-line);
}

.page-contact .ct-cat {
  position: relative;
  padding: 20px 20px 22px;
  background: #fff;
  transition: background 0.24s var(--yx-ease), transform 0.24s var(--yx-ease);
}

.page-contact .ct-cat::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 3px;
  background: var(--yx-orange);
  transition: width 0.3s var(--yx-ease);
}

.page-contact .ct-cat:hover {
  background: #fbfdff;
  transform: translateY(-2px);
}

.page-contact .ct-cat:hover::after {
  width: 100%;
}

.page-contact .ct-cat__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--yx-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--yx-blue);
}

.page-contact .ct-cat__name {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--yx-deep);
}

.page-contact .ct-cat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--yx-gray);
}

.page-contact .ct-advice__extra {
  margin-top: 30px;
  padding: 22px 20px 24px;
  background: linear-gradient(120deg, rgba(10, 42, 74, 0.04), rgba(74, 143, 212, 0.08));
  border-left: 3px solid var(--yx-blue);
}

.page-contact .ct-advice__sub {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--yx-deep);
}

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

.page-contact .ct-advice__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--yx-mid);
}

.page-contact .ct-advice__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--yx-orange);
}

/* ---------- 区域对接（深色） ---------- */
.page-contact .ct-network {
  background:
    radial-gradient(90% 120% at 88% 0%, rgba(74, 143, 212, 0.28), transparent 58%),
    linear-gradient(152deg, var(--yx-deep) 0%, var(--yx-mid) 62%, #0c3155 100%);
  color: #fff;
}

.page-contact .ct-network .yx-section__index {
  color: var(--yx-amber);
}

.page-contact .ct-network .yx-section__title {
  color: #fff;
}

.page-contact .ct-network .yx-section__lead {
  color: rgba(215, 227, 239, 0.86);
}

.page-contact .ct-nodes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(215, 227, 239, 0.2);
}

.page-contact .ct-node {
  position: relative;
  padding: 16px 18px;
  background: rgba(10, 42, 74, 0.72);
  cursor: default;
}

.page-contact .ct-node__dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 10px;
  background: var(--yx-orange);
  transform: rotate(45deg);
  animation: ct-breathe 2.6s ease-in-out infinite;
}

.page-contact .ct-node__name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.page-contact .ct-node__tip {
  display: block;
  margin: 8px 0 0 19px;
  font-family: var(--yx-mono);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(215, 227, 239, 0.88);
}

@keyframes ct-breathe {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

.page-contact .ct-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 32px;
}

.page-contact .ct-network__text h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
  color: #fff;
}

.page-contact .ct-network__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(215, 227, 239, 0.88);
}

.page-contact .ct-network__link {
  margin-top: 18px;
}

.page-contact .ct-network__link a {
  display: inline-block;
  padding-bottom: 3px;
  font-size: 14px;
  font-weight: 600;
  color: var(--yx-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 180, 84, 0.55);
}

.page-contact .ct-network__link a:hover {
  color: #fff;
  border-bottom-color: #fff;
}

/* ---------- 常见疑问 ---------- */
.page-contact .ct-faq__list {
  margin-top: 28px;
  border-top: 1px solid var(--yx-silver);
}

.page-contact .ct-faq__item {
  border-bottom: 1px solid var(--yx-silver);
}

.page-contact .ct-faq__item summary {
  position: relative;
  padding: 20px 44px 20px 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--yx-deep);
  cursor: pointer;
  list-style: none;
}

.page-contact .ct-faq__item summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-faq__item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--yx-mono);
  font-size: 22px;
  font-weight: 400;
  color: var(--yx-orange);
}

.page-contact .ct-faq__item[open] summary::after {
  content: "–";
}

.page-contact .ct-faq__item p {
  margin: 0 0 22px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--yx-gray);
}

/* ---------- 联系方式 ---------- */
.page-contact .ct-contact {
  background: linear-gradient(180deg, rgba(215, 227, 239, 0.3), rgba(244, 247, 250, 0));
}

.page-contact .ct-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 28px;
}

.page-contact .ct-contact__lines {
  border-top: 2px solid var(--yx-deep);
}

.page-contact .ct-contact__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--yx-silver);
}

.page-contact .ct-contact__key {
  font-family: var(--yx-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yx-gray);
}

.page-contact .ct-contact__val {
  font-family: var(--yx-mono);
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 600;
  color: var(--yx-blue);
  word-break: break-all;
  user-select: all;
}

.page-contact .ct-contact__val--wide {
  font-family: var(--yx-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--yx-ink);
  word-break: break-word;
}

.page-contact .ct-contact__note {
  padding: 22px 20px 24px;
  background: var(--yx-silver);
  clip-path: polygon(0 0, calc(100% - var(--ct-notch)) 0, 100% var(--ct-notch), 100% 100%, 0 100%);
}

.page-contact .ct-contact__note-head {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--yx-deep);
}

.page-contact .ct-contact__clock {
  margin: 0 0 12px;
  font-family: var(--yx-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--yx-orange);
}

.page-contact .ct-contact__note p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--yx-mid);
}

.page-contact .ct-contact__hint {
  margin-bottom: 0 !important;
  padding-top: 14px;
  border-top: 1px dashed rgba(30, 93, 156, 0.28);
  color: var(--yx-gray) !important;
}

.page-contact .ct-contact__hint a {
  color: var(--yx-blue);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 93, 156, 0.35);
}

.page-contact .ct-contact__hint a:hover {
  color: var(--yx-orange);
  border-bottom-color: var(--yx-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .ct-intro__facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 26px;
  }

  .page-contact .ct-intro__facts li {
    flex-direction: column;
    gap: 6px;
    border-bottom: none;
    border-left: 2px solid var(--yx-silver);
    padding-left: 18px;
  }

  .page-contact .ct-intro__facts li:first-child {
    border-left: none;
    padding-left: 0;
  }

  .page-contact .ct-form {
    padding: 28px 26px 30px;
  }

  .page-contact .ct-form__actions {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-contact .ct-form__submit {
    width: auto;
    min-width: 168px;
  }

  .page-contact .ct-form__hint {
    max-width: 34ch;
  }

  .page-contact .ct-cats {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .ct-nodes {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .ct-contact__row {
    flex-direction: row;
    align-items: baseline;
    gap: 20px;
  }

  .page-contact .ct-contact__key {
    flex: 0 0 96px;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-submit__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 32px;
    align-items: start;
  }

  .page-contact .ct-rhythm__list {
    padding-left: 26px;
  }

  .page-contact .ct-cats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .ct-nodes {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .ct-network__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
    align-items: center;
    margin-top: 40px;
  }

  .page-contact .ct-contact__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .ct-advice__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-node__dot {
    animation: none;
    opacity: 1;
  }

  .page-contact .ct-cat,
  .page-contact .ct-cat::after {
    transition: none;
  }
}