.page-contact {
  --pc-radius: 24px;
  display: block;
  background: var(--sb-void);
  color: var(--sb-text);
  font-family: var(--sb-sans);
  -webkit-font-smoothing: antialiased;
}

.page-contact :where(a) {
  color: var(--sb-cyan);
  text-decoration: none;
}

.page-contact :where(a:hover) {
  color: var(--sb-cyan-soft);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(38px, 7vw, 84px) 0 clamp(44px, 8vw, 96px);
}

.page-contact .pc-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  opacity: .18;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(110% 80% at 12% 0%, rgba(0, 224, 198, .16), transparent 60%),
    radial-gradient(80% 70% at 96% 18%, rgba(255, 138, 61, .12), transparent 62%),
    linear-gradient(180deg, rgba(5, 7, 13, .55) 0%, rgba(5, 7, 13, .88) 58%, var(--sb-void) 100%);
}

.page-contact .pc-hero__wrap {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.page-contact .pc-hero__kicker {
  margin: 22px 0 0;
}

.page-contact .pc-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.015em;
}

.page-contact .pc-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.75;
  color: var(--sb-muted);
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 章节通用 ---------- */
.page-contact .pc-sec {
  padding: clamp(48px, 8vw, 100px) 0;
}

.page-contact .pc-sec--alt {
  background: linear-gradient(180deg, var(--sb-surface) 0%, rgba(11, 18, 32, .35) 100%);
  border-top: 1px solid var(--sb-line);
  border-bottom: 1px solid var(--sb-line);
}

.page-contact .pc-sec__head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-contact .pc-sec__head .sb-index {
  margin: 0 0 12px;
}

.page-contact .pc-sec__head .sb-title-xl {
  margin: 0 0 14px;
}

.page-contact .pc-sec__head .sb-lede {
  margin: 0;
  color: var(--sb-muted);
}

.page-contact .pc-note {
  margin: 32px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--sb-cyan);
  max-width: 62em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sb-muted);
}

/* ---------- 01 渠道 ---------- */
.page-contact .pc-channels {
  display: grid;
  gap: 16px;
}

.page-contact .pc-channel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--sb-line);
  border-radius: var(--pc-radius);
  background: var(--sb-card);
}

.page-contact .pc-channel__tag {
  margin: 0;
  font-family: var(--sb-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--sb-muted);
}

.page-contact .pc-channel__name {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 800;
}

.page-contact .pc-channel__value {
  margin: 4px 0 0;
  font-family: var(--sb-mono);
  font-size: clamp(16px, 2.4vw, 23px);
  font-weight: 700;
  letter-spacing: -.005em;
  word-break: break-all;
  color: var(--sb-text);
}

.page-contact .pc-channel__value--addr {
  font-size: clamp(14px, 1.8vw, 17px);
  line-height: 1.7;
  letter-spacing: .02em;
}

.page-contact .pc-channel__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sb-muted);
}

.page-contact .pc-channel__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .pc-channel__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sb-muted);
}

.page-contact .pc-channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--sb-cyan);
}

.page-contact .pc-channel--mail {
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(255, 138, 61, .18), transparent 58%),
    linear-gradient(180deg, #17202F 0%, var(--sb-card) 72%);
  border-color: rgba(255, 138, 61, .36);
  box-shadow: 0 30px 90px -60px rgba(255, 138, 61, .9);
}

.page-contact .pc-channel--mail .pc-channel__tag {
  color: var(--sb-orange-soft);
}

.page-contact .pc-channel--mail .pc-channel__value {
  color: var(--sb-orange);
}

.page-contact .pc-channel--mail .pc-channel__list li::before {
  background: var(--sb-orange);
}

/* ---------- 02 受理范围 ---------- */
.page-contact .pc-scope {
  display: grid;
  gap: 24px;
}

.page-contact .pc-scope__item {
  padding-top: 22px;
  border-top: 1px solid var(--sb-line);
}

.page-contact .pc-scope__no {
  display: inline-block;
  font-family: var(--sb-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sb-cyan);
}

.page-contact .pc-scope__title {
  margin: 10px 0 10px;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
}

.page-contact .pc-scope__item p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--sb-muted);
}

/* ---------- 03 回复时间 ---------- */
.page-contact .pc-sla {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-contact .pc-meters {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 26px;
}

.page-contact .pc-meter {
  display: grid;
  gap: 10px;
  opacity: 1;
  transition: opacity .5s var(--sb-ease), transform .5s var(--sb-ease);
}

.sb-js .page-contact .pc-meter[data-reveal] {
  opacity: .25;
  transform: translateY(10px);
}

.sb-js .page-contact .pc-meter[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.page-contact .pc-meter__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 16px;
}

.page-contact .pc-meter__label {
  font-size: 15px;
  font-weight: 700;
}

.page-contact .pc-meter__time {
  font-family: var(--sb-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--sb-cyan);
}

.page-contact .pc-meter__track {
  height: 6px;
  border-radius: var(--sb-pill);
  background: var(--sb-line);
  overflow: hidden;
}

.page-contact .pc-meter__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--sb-cyan), var(--sb-cyan-soft));
}

.page-contact .pc-meter__fill--a { width: 30%; }
.page-contact .pc-meter__fill--b { width: 66%; }
.page-contact .pc-meter__fill--c { width: 100%; }

.page-contact .pc-meter__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sb-muted);
}

.page-contact .pc-sla__figure {
  margin: 0;
}

.page-contact .pc-sla__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--sb-line);
  border-radius: var(--pc-radius);
}

.page-contact .pc-sla__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sb-muted);
}

/* ---------- 04 提交要点 ---------- */
.page-contact .pc-brief {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .pc-brief__item {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-r);
  background: rgba(19, 28, 46, .55);
}

.page-contact .pc-brief__no {
  font-family: var(--sb-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sb-cyan);
}

.page-contact .pc-brief__item h3 {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 800;
}

.page-contact .pc-brief__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sb-muted);
}

/* ---------- 05 合作 ---------- */
.page-contact .pc-coop {
  display: grid;
  gap: 18px;
}

.page-contact .pc-coop__card {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--sb-line);
  border-radius: var(--pc-radius);
  background: linear-gradient(180deg, rgba(19, 28, 46, .92) 0%, rgba(11, 18, 32, .68) 100%);
}

.page-contact .pc-coop__card h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 800;
}

.page-contact .pc-coop__card p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sb-muted);
}

.page-contact .pc-coop__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--sb-line);
  font-family: var(--sb-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--sb-cyan-soft);
}

/* ---------- 06 分类标签 ---------- */
.page-contact .pc-topics {
  display: grid;
  gap: 22px;
}

.page-contact .pc-tags {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .pc-tag {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-pill);
  background: rgba(19, 28, 46, .7);
  font-size: 14px;
  color: var(--sb-text);
  transition: border-color var(--sb-dur) var(--sb-ease),
              color var(--sb-dur) var(--sb-ease),
              transform var(--sb-dur) var(--sb-ease);
}

.page-contact .pc-tag:hover,
.page-contact .pc-tag:focus-visible {
  border-color: var(--sb-cyan);
  color: var(--sb-cyan);
  transform: translateY(-2px);
  text-decoration: none;
}

.page-contact .pc-topics__panels {
  display: grid;
  gap: 14px;
}

.page-contact .pc-topic {
  padding: clamp(18px, 2.6vw, 26px);
  border-left: 2px solid var(--sb-line);
  border-radius: 0 var(--sb-r) var(--sb-r) 0;
  background: rgba(11, 18, 32, .6);
  scroll-margin-top: calc(var(--sb-head-h) + 24px);
  transition: border-color var(--sb-dur) var(--sb-ease), background var(--sb-dur) var(--sb-ease);
}

.page-contact .pc-topic:target {
  border-left-color: var(--sb-cyan);
  background: rgba(0, 224, 198, .06);
}

.page-contact .pc-topic__title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 800;
}

.page-contact .pc-topic__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-contact .pc-topic__list li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--sb-muted);
}

.page-contact .pc-topic__list li::marker {
  color: var(--sb-cyan);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 700px) {
  .page-contact .pc-brief {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-contact .pc-coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 44px;
  }
}

@media (min-width: 880px) {
  .page-contact .pc-channels {
    grid-template-columns: 1.4fr 1fr;
  }

  .page-contact .pc-channel--mail {
    grid-row: span 2;
  }
}

@media (min-width: 940px) {
  .page-contact .pc-sla {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-contact .pc-topics {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .pc-tags {
    flex-direction: column;
    flex-wrap: nowrap;
    position: sticky;
    top: calc(var(--sb-head-h) + 24px);
  }

  .page-contact .pc-tag {
    width: 100%;
    justify-content: flex-start;
  }

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

@media (min-width: 1080px) {
  .page-contact .pc-brief {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}