.page-contact {
  --contact-gap: clamp(28px, 4vw, 56px);
  --contact-pad: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏：值守台铭牌 ---------- */

.page-contact .contact-hero {
  position: relative;
  background-color: var(--bg-pitch);
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 9vw, 124px);
  overflow: hidden;
}

.page-contact .contact-hero__visual {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  filter: saturate(0.65) contrast(1.05);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(8, 21, 15, 0.62) 0%, rgba(8, 21, 15, 0.88) 58%, var(--bg-pitch) 100%),
    linear-gradient(102deg, rgba(8, 21, 15, 0.92) 0%, rgba(15, 42, 32, 0.42) 56%, rgba(15, 42, 32, 0) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  align-content: start;
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-size: clamp(38px, 7.4vw, 72px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.022em;
  color: var(--mineral-linen);
}

.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--mineral-stone);
}

.page-contact .contact-hero__hint {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--moss-mid);
}

.page-contact .contact-plate {
  margin-top: clamp(8px, 1.6vw, 18px);
  max-width: 780px;
  display: grid;
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--cyan);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-contact .contact-plate__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 15px clamp(16px, 2.4vw, 24px);
  border-bottom: 1px solid var(--hairline);
}

.page-contact .contact-plate__row:last-child {
  border-bottom: 0;
}

.page-contact .contact-plate__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--moss-mid);
}

.page-contact .contact-plate__value {
  flex: 1 1 220px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.1vw, 20px);
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--mineral-linen);
  word-break: break-all;
  user-select: all;
}

.page-contact .contact-plate__copy {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 6px 14px;
  font-family: var(--font-sans);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--hairline-cyan);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.page-contact .contact-plate__copy:hover,
.page-contact .contact-plate__copy:focus-visible {
  color: var(--bg-pitch);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .contact-plate__copy:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

/* ---------- 客服渠道 ---------- */

.page-contact .contact-channel__lede,
.page-contact .contact-biz__lede,
.page-contact .contact-visit__lede,
.page-contact .contact-ask__lede,
.page-contact .contact-billing__lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--mineral-stone);
}

.page-contact .contact-channel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .contact-channel__item {
  border-top: 2px solid var(--moss-mid);
  padding-top: 18px;
}

.page-contact .contact-channel__item h3 {
  margin: 0 0 12px;
  font-size: var(--fs-24);
  line-height: 1.3;
  color: var(--mineral-linen);
}

.page-contact .contact-channel__item p {
  margin: 0 0 12px;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--mineral-stone);
}

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

.page-contact .contact-channel__item p.contact-channel__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .contact-channel__figure {
  margin: clamp(34px, 5vw, 60px) 0 0;
}

/* ---------- 商务合作 ---------- */

.page-contact .contact-biz__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .contact-biz__column h3 {
  margin: 0 0 16px;
  font-size: var(--fs-24);
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .contact-biz__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .contact-biz__list li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .contact-biz__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 9px;
  height: 1px;
  background: var(--mineral-clay);
}

.page-contact .contact-biz__list--on-dark li {
  color: var(--mineral-stone);
}

.page-contact .contact-biz__list--on-dark li::before {
  background: var(--cyan);
}

.page-contact .contact-biz__template {
  background: var(--bg-pitch);
  border-left: 2px solid var(--cyan);
  padding: var(--contact-pad);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-contact .contact-biz__template-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--moss-mid);
}

.page-contact .contact-biz__template-code {
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.2vw, 20px);
  letter-spacing: 0.04em;
  color: var(--cyan);
  background: var(--glass);
  border: 1px dashed var(--hairline-cyan);
  user-select: all;
}

.page-contact .contact-biz__template-foot {
  margin: 4px 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--moss-mid);
}

/* ---------- 订阅与发票 ---------- */

.page-contact .contact-billing__steps {
  list-style: none;
  counter-reset: cb-step;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .contact-billing__steps li {
  counter-increment: cb-step;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mineral-stone);
}

.page-contact .contact-billing__steps li::before {
  content: counter(cb-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  line-height: 1.1;
  color: var(--cyan);
}

.page-contact .contact-billing__tail {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  max-width: 68ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--mineral-stone);
}

.page-contact .contact-billing__tail a {
  color: var(--blue);
  text-underline-offset: 3px;
}

/* ---------- 常见咨询 ---------- */

.page-contact .contact-ask__wall {
  list-style: none;
  margin: clamp(26px, 3.6vw, 40px) 0 clamp(30px, 4.4vw, 52px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hairline);
}

.page-contact .contact-ask__wall li {
  border-bottom: 1px solid var(--hairline);
  min-width: 0;
}

.page-contact .contact-ask__wall a {
  position: relative;
  display: block;
  padding: 15px 14px 18px;
  font-size: var(--fs-16);
  line-height: 1.5;
  color: var(--mineral-linen);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-contact .contact-ask__wall a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 11px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

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

.page-contact .contact-ask__wall a:hover::after,
.page-contact .contact-ask__wall a:focus-visible::after {
  transform: scaleX(1);
}

.page-contact .contact-ask__answers {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-contact .contact-ask__answer {
  scroll-margin-top: calc(var(--bar-h) + 32px);
  border-top: 1px solid var(--hairline-cyan);
  padding-top: 16px;
}

.page-contact .contact-ask__answer h3 {
  margin: 0 0 10px;
  font-size: var(--fs-18);
  line-height: 1.4;
  color: var(--mineral-linen);
}

.page-contact .contact-ask__answer p {
  margin: 0 0 10px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mineral-stone);
}

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

.page-contact .contact-ask__answer a {
  color: var(--blue);
  text-underline-offset: 3px;
}

/* ---------- 来访与地址 ---------- */

.page-contact .contact-visit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-contact .contact-visit__item {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  min-width: 0;
}

.page-contact .contact-visit__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--ink);
  opacity: 0.72;
}

.page-contact .contact-visit__value {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .contact-visit__note {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  max-width: 64ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink);
  opacity: 0.74;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .contact-ask__wall {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 800px) {
  .page-contact .contact-channel__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-contact .contact-biz__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-contact .contact-ask__answers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-contact .contact-hero {
    padding-block: clamp(48px, 5vw, 84px) clamp(80px, 9vw, 148px);
  }

  .page-contact .contact-hero__inner {
    max-width: min(100%, 1080px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-plate__copy,
  .page-contact .contact-ask__wall a,
  .page-contact .contact-ask__wall a::after {
    transition: none;
  }
}