.page-contact {
  --contact-border-strong: 3px solid var(--white);
  --contact-border-dim: 2px solid var(--blue-600);
  --contact-card-bg: var(--blue-800);

  position: relative;
  width: 100%;
  min-height: 100vh;
  padding: 1.5rem 1.25rem 4rem;
  background:
    radial-gradient(circle at 88% 4%, rgba(255, 215, 0, 0.06) 0%, transparent 30%),
    linear-gradient(155deg, var(--blue-900) 0%, var(--blue-800) 55%, var(--blue-700) 100%);
  color: var(--white);
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-contact .breadcrumb {
  margin-bottom: 2rem;
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-contact .breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin: 0 0.6rem;
  color: var(--slate);
  opacity: 0.4;
}

.page-contact .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--white);
}

/* ===== 首屏标题 ===== */
.page-contact .contact-hero {
  position: relative;
  padding: 1rem 0 2.25rem;
  margin-bottom: 2.5rem;
  border-bottom: var(--contact-border-strong);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--orange) 0 18px,
    var(--blue-600) 18px 36px,
    var(--white) 36px 44px
  );
}

.page-contact .contact-hero .hero-index {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.3rem 1rem 0.3rem 0.7rem;
  background: var(--orange);
  clip-path: polygon(0 0, calc(100% - 0.6rem) 0, 100% 50%, calc(100% - 0.6rem) 100%, 0 100%);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-900);
}

.page-contact .contact-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.page-contact .contact-hero h1 span {
  display: block;
  margin-top: 0.18em;
  color: var(--orange);
  font-size: 0.6em;
  letter-spacing: 0.04em;
}

.page-contact .contact-hero .hero-lead {
  max-width: 42rem;
  margin: 0;
  color: var(--slate);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== 主体左右分栏 ===== */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

.page-contact .contact-info-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ===== 信息区块通用 ===== */
.page-contact .contact-info-col > section {
  position: relative;
  padding: 1.75rem;
  background: var(--contact-card-bg);
  border: var(--contact-border-dim);
  box-shadow: var(--shadow-card);
}

.page-contact .contact-info-col > section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3.25rem;
  height: 3px;
  background: var(--orange);
}

/* ===== 区块标题 ===== */
.page-contact .section-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 1.4rem;
}

.page-contact .section-head-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.08em;
}

.page-contact .section-head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ===== 联系渠道图片 ===== */
.page-contact .contact-img-support {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1.5rem;
  border: 2px solid var(--blue-600);
  object-fit: cover;
}

/* ===== 时间线 ===== */
.page-contact .contact-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-timeline::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--blue-600);
}

.page-contact .contact-timeline-item {
  position: relative;
  margin-bottom: 1.35rem;
  padding-left: 3.75rem;
}

.page-contact .contact-timeline-item:last-child {
  margin-bottom: 0;
}

.page-contact .timeline-icon {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.6rem;
  height: 2.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-900);
  border: 2px solid var(--orange);
  color: var(--orange);
}

.page-contact .timeline-icon svg {
  width: 1.15rem;
  height: 1.15rem;
}

.page-contact .timeline-content h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-contact .timeline-value {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.page-contact .timeline-desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--slate);
}

/* ===== 地址信息 ===== */
.page-contact .contact-img-address {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1.25rem;
  border: 2px solid var(--blue-600);
  object-fit: cover;
}

.page-contact .address-line {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

.page-contact .address-line svg {
  flex: 0 0 auto;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.2rem;
  color: var(--orange);
}

.page-contact .address-note {
  margin: 0;
  padding-left: 1.85rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--slate);
}

/* ===== 其他说明 ===== */
.page-contact .contact-note-block p {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .contact-note-block p:last-child {
  margin-bottom: 0;
}

.page-contact .note-strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .note-trust {
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--blue-600);
  font-size: 0.8rem;
  color: var(--slate);
  line-height: 1.65;
}

/* ===== 右列表单 ===== */
.page-contact .contact-form-col {
  position: relative;
  padding: 1.75rem;
  background: var(--blue-900);
  border: var(--contact-border-strong);
  box-shadow: var(--shadow-hard);
}

.page-contact .contact-form-col::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 4rem;
  height: 4rem;
  background: var(--orange);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-contact .form-intro {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-contact .contact-form {
  display: grid;
  gap: 1.25rem;
}

.page-contact .form-field {
  display: grid;
  gap: 0.4rem;
}

.page-contact .form-field label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
}

.page-contact .required-mark {
  color: var(--orange);
  font-weight: 700;
}

.page-contact .form-field input,
.page-contact .form-field select,
.page-contact .form-field textarea {
  width: 100%;
  padding: 0.75rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--white);
  background: var(--blue-800);
  border: 2px solid var(--blue-600);
  border-radius: 0;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.page-contact .form-field input::placeholder,
.page-contact .form-field textarea::placeholder {
  color: var(--slate);
  opacity: 0.55;
}

.page-contact .form-field input:focus,
.page-contact .form-field select:focus,
.page-contact .form-field textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.22);
}

.page-contact .form-field select {
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--orange) 50%),
    linear-gradient(135deg, var(--orange) 50%, transparent 50%);
  background-position:
    calc(100% - 1.15rem) 55%,
    calc(100% - 0.8rem) 55%;
  background-size:
    0.35rem 0.35rem,
    0.35rem 0.35rem;
  background-repeat: no-repeat;
  cursor: pointer;
  padding-right: 2.5rem;
}

.page-contact .form-field select option {
  background: var(--blue-800);
  color: var(--white);
}

.page-contact .form-field textarea {
  resize: vertical;
  min-height: 7rem;
  line-height: 1.6;
}

.page-contact .contact-form .btn {
  justify-self: start;
  margin-top: 0.25rem;
}

.page-contact .form-status {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px dashed var(--blue-600);
}

/* ===== 相关链接 ===== */
.page-contact .contact-related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.page-contact .contact-related-links a {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--slate);
  background: transparent;
  border: 2px solid var(--blue-600);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.page-contact .contact-related-links a:hover {
  color: var(--blue-900);
  background: var(--orange);
  border-color: var(--orange);
}

/* ===== 桌面端布局 ===== */
@media (min-width: 960px) {
  .page-contact {
    padding: 2.5rem 3rem 4.5rem;
  }

  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 2.25rem;
    align-items: start;
  }

  .page-contact .contact-info-col {
    gap: 1.75rem;
  }

  .page-contact .contact-info-col > section {
    padding: 2rem;
  }

  .page-contact .contact-form-col {
    position: sticky;
    top: 6rem;
    padding: 2rem;
  }

  .page-contact .contact-hero h1 {
    font-size: 3.25rem;
  }

  .page-contact .contact-hero .hero-lead {
    font-size: 1rem;
  }

  .page-contact .timeline-value {
    font-size: 1.05rem;
  }
}