.page-contact {
  --contact-card-bg: #0d1219;
  --contact-card-bg-soft: #0a0f16;
  --contact-line-blue: rgba(0, 212, 255, 0.14);
  --contact-line-green: rgba(57, 255, 136, 0.12);
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.025) 1px, transparent 1px);
  background-size: 36px 36px;
  padding-bottom: var(--space-6);
}

/* ---------- 页面头部 ---------- */
.contact-hero {
  position: relative;
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
  overflow: hidden;
}

.contact-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-blue-green);
}

.contact-hero::after {
  content: '';
  position: absolute;
  top: -120px;
  right: -60px;
  width: 260px;
  height: 260px;
  border: 1px solid var(--border-dark);
  transform: rotate(45deg);
  pointer-events: none;
}

.contact-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 0.01em;
  margin: 0 0 var(--space-3);
}

.contact-hero h1::before {
  content: '';
  display: block;
  width: 56px;
  height: 7px;
  margin-bottom: var(--space-3);
  background: var(--accent-green);
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
}

.contact-hero__lead {
  max-width: 660px;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 var(--space-4);
}

.contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.contact-hero__emblem {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  padding-left: var(--space-2);
  border-left: 1px solid var(--border-dark);
  flex-shrink: 0;
}

.contact-hero__emblem svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.contact-hero__emblem-text {
  color: var(--accent-blue);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.22em;
}

/* ---------- 联系主区 ---------- */
.contact-main {
  position: relative;
  margin-top: var(--space-4);
}

.contact-main::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(0, 212, 255, 0.07) 0%, transparent 60%),
    repeating-linear-gradient(-45deg, transparent 0 14px, rgba(57, 255, 136, 0.03) 14px 15px);
  pointer-events: none;
}

.contact-main__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

/* ---------- 表单卡片 ---------- */
.contact-form-card {
  background: var(--contact-card-bg);
  border: 1px solid var(--border-dark);
  padding: var(--space-5) var(--space-4);
  position: relative;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.contact-form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 52px;
  height: 3px;
  background: var(--accent-green);
}

.contact-form-card__header,
.contact-info-card__header,
.contact-promise__header,
.contact-related__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.contact-form-card__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 7px;
  border: 1px solid var(--accent-blue);
  color: var(--accent-blue);
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
  background: rgba(0, 212, 255, 0.05);
}

.contact-form-card__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0 0 var(--space-4);
}

/* ---------- 表单 ---------- */
.contact-form__field {
  margin-bottom: var(--space-4);
}

.contact-form__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.contact-form__input {
  display: block;
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--border-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: var(--space-2) 0;
  border-radius: 0;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.contact-form__input::placeholder {
  color: rgba(154, 167, 181, 0.55);
}

.contact-form__input:hover {
  border-bottom-color: rgba(57, 255, 136, 0.45);
}

.contact-form__input:focus {
  outline: none;
  border-bottom-color: var(--accent-green);
  box-shadow: 0 1px 0 var(--accent-green);
}

.contact-form__textarea {
  min-height: 128px;
  resize: vertical;
  line-height: 1.6;
}

select.contact-form__input {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-secondary) 50%),
    linear-gradient(135deg, var(--text-secondary) 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 3px),
    calc(100% - 15px) calc(50% - 3px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.contact-form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.contact-form__hint {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.6;
  margin: 0;
}

.contact-form__success {
  margin-top: var(--space-4);
  border-left: 3px solid var(--accent-green);
  background: rgba(57, 255, 136, 0.06);
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.contact-form__success[hidden] {
  display: none;
}

/* ---------- 联系信息 ---------- */
.contact-info-card {
  position: relative;
}

.contact-info-list {
  margin: 0;
  padding: 0;
}

.contact-info-list__item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-dark);
}

.contact-info-list__item dt {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-info-list__item dd {
  margin: 0;
  color: var(--text-primary);
  font-weight: 700;
  word-break: break-all;
  line-height: 1.6;
}

.contact-info-list__link {
  color: var(--accent-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-bottom-color 0.2s var(--ease);
}

.contact-info-list__link:hover {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.contact-info-list__send {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 2px 12px;
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.contact-info-list__send:hover {
  background: var(--accent-green);
  color: var(--bg-primary);
}

.contact-info-card__map {
  margin-top: var(--space-4);
  border: 1px solid var(--border-dark);
  position: relative;
  overflow: hidden;
  background: var(--contact-card-bg-soft);
}

.contact-info-card__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.1) contrast(1.04);
  opacity: 0.92;
}

.contact-info-card__map::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(45deg, transparent 47%, rgba(0, 212, 255, 0.18) 48%, rgba(0, 212, 255, 0.18) 50%, transparent 51%),
    linear-gradient(-45deg, transparent 47%, rgba(57, 255, 136, 0.14) 48%, rgba(57, 255, 136, 0.14) 50%, transparent 51%);
  pointer-events: none;
  mix-blend-mode: screen;
}

.contact-info-card__note {
  margin: 0;
  padding: var(--space-3);
  background: var(--contact-card-bg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  border-top: 1px solid var(--border-dark);
}

/* ---------- 回复承诺 ---------- */
.contact-promise {
  margin-top: var(--space-6);
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  position: relative;
  overflow: hidden;
}

.contact-promise::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(105deg, transparent 0%, transparent 30%, rgba(0, 212, 255, 0.05) 100%);
  pointer-events: none;
}

.contact-promise__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  padding: var(--space-5) 0 var(--space-6);
}

.contact-promise__content {
  max-width: 560px;
}

.contact-promise__lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin: 0 0 var(--space-3);
}

.contact-promise__lead a {
  color: var(--accent-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 136, 0.4);
  transition: border-bottom-color 0.2s var(--ease);
}

.contact-promise__lead a:hover {
  border-bottom-color: var(--accent-green);
}

.contact-promise__body {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 0 var(--space-4);
}

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

.contact-promise__list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--border-dark);
  color: var(--text-primary);
}

.contact-promise__list li:last-child {
  border-bottom: 0;
}

.contact-promise__list li span {
  min-width: 44px;
  color: var(--accent-green);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.contact-promise__figure {
  margin: 0;
  border: 1px solid var(--border-dark);
  background: var(--contact-card-bg);
  align-self: start;
}

.contact-promise__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: 1px solid var(--border-dark);
}

.contact-promise__figure figcaption {
  padding: var(--space-3);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--border-dark);
}

/* ---------- 相关帮助 ---------- */
.contact-related {
  margin-top: var(--space-6);
}

.contact-related__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.contact-related__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--contact-card-bg-soft);
  border: 1px solid var(--border-dark);
  padding: var(--space-4);
  text-decoration: none;
  color: var(--text-primary);
  position: relative;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.contact-related__card:hover {
  border-color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.04);
}

.contact-related__num {
  color: var(--accent-blue);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
}

.contact-related__label {
  font-weight: 900;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.contact-related__desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 0;
}

/* ---------- 媒体查询：平板 ---------- */
@media (min-width: 768px) {
  .contact-hero {
    padding-top: var(--space-6);
    padding-bottom: var(--space-5);
  }

  .contact-hero__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--space-4);
  }

  .contact-hero__lead {
    font-size: 1.0625rem;
  }

  .contact-promise__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .contact-related__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 媒体查询：桌面 ---------- */
@media (min-width: 992px) {
  .contact-main__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-5);
  }

  .contact-form-card {
    padding: var(--space-6);
  }

  .contact-info-card {
    padding-left: var(--space-3);
  }

  .contact-info-list__item {
    grid-template-columns: 104px 1fr;
  }

  .contact-form__actions {
    margin-top: var(--space-5);
  }

  .contact-promise__inner {
    gap: var(--space-6);
  }
}