.page-contact {
  --pc-rule: 1px solid var(--rule-line);
  --pc-space: clamp(22px, 3.2vw, 44px);
  background: var(--paper-cream);
  color: var(--ink-charcoal);
}

/* ---------- 首屏联系台 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--pitch-night);
  color: var(--paper-cream);
  padding: clamp(24px, 4vw, 44px) 0 clamp(46px, 7vw, 92px);
}

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

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.75) contrast(1.06);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(15, 42, 31, .97) 0%, rgba(15, 42, 31, .88) 44%, rgba(15, 42, 31, .58) 100%),
    repeating-linear-gradient(122deg, rgba(53, 166, 91, .1) 0 2px, transparent 2px 22px);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .contact-hero .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .06em;
}

.page-contact .contact-hero .breadcrumb-item {
  color: rgba(247, 243, 232, .6);
}

.page-contact .contact-hero .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(247, 243, 232, .34);
}

.page-contact .contact-hero .breadcrumb-item a {
  color: rgba(247, 243, 232, .78);
  text-decoration: none;
  border-bottom: 1px solid rgba(247, 243, 232, .28);
}

.page-contact .contact-hero .breadcrumb-item a:hover {
  color: var(--volt-highlight);
  border-bottom-color: var(--volt-highlight);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 58px);
  align-items: start;
}

.page-contact .contact-hero .eyebrow {
  color: var(--volt-highlight);
  font-size: 12px;
  letter-spacing: .1em;
  margin: 0 0 16px;
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--paper-cream);
}

.page-contact .contact-hero .lede {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(247, 243, 232, .78);
}

.page-contact .mailblock {
  margin-top: clamp(26px, 3.8vw, 40px);
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid rgba(201, 242, 77, .32);
  border-radius: var(--radius);
  background: rgba(21, 54, 39, .68);
  box-shadow: var(--shadow-2);
}

.page-contact .mailblock__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--volt-highlight);
}

.page-contact .mailblock__addr {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(.95rem, 2.3vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--paper-cream);
  text-decoration: none;
  overflow-wrap: anywhere;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(201, 242, 77, .3);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-contact .mailblock__addr:hover {
  color: var(--volt-highlight);
  border-bottom-color: var(--volt-highlight);
}

.page-contact .mailblock .copy-btn {
  display: inline-flex;
  align-items: center;
  margin-top: 16px;
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--paper-cream);
  background: transparent;
  border: 1px solid rgba(247, 243, 232, .4);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

.page-contact .mailblock .copy-btn:hover {
  background: var(--volt-highlight);
  border-color: var(--volt-highlight);
  color: var(--pitch-night);
}

.page-contact .mailblock .copy-btn:focus-visible,
.page-contact .hero-actions .btn:focus-visible {
  outline: 2px solid var(--volt-highlight);
  outline-offset: 2px;
}

.page-contact .contact-hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 20px;
  border: 1px solid rgba(247, 243, 232, .16);
  background: rgba(247, 243, 232, .16);
}

.page-contact .meta-item {
  padding: 14px 16px;
  background: rgba(15, 42, 31, .88);
}

.page-contact .meta-item__label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grass-light);
}

.page-contact .meta-item__value {
  display: block;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(247, 243, 232, .9);
}

.page-contact .meta-item__value.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: .02em;
}

.page-contact .contact-hero__note {
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(247, 243, 232, .6);
}

.page-contact .hero-actions {
  margin-top: clamp(20px, 2.8vw, 30px);
}

.page-contact .hero-actions .btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast);
}

.page-contact .hero-actions .btn--volt {
  background: var(--volt-highlight);
  color: var(--pitch-night);
  font-weight: 700;
  border: 1px solid var(--volt-highlight);
}

.page-contact .hero-actions .btn--volt:hover {
  background: var(--paper-cream);
  border-color: var(--paper-cream);
}

.page-contact .contact-hero__split {
  border-top: 2px solid var(--grass-light);
  padding-top: 20px;
}

.page-contact .split-heading {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--volt-highlight);
}

.page-contact .split-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .split-col {
  padding-left: 16px;
  border-left: 1px solid var(--grass-light);
}

.page-contact .split-col--no {
  border-left-color: var(--point-orange);
}

.page-contact .split-col__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(247, 243, 232, .66);
}

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

.page-contact .split-list li {
  position: relative;
  padding-left: 15px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(247, 243, 232, .92);
}

.page-contact .split-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: currentColor;
  opacity: .55;
}

/* ---------- 通用区块节奏 ---------- */
.page-contact .section {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-contact .section--tight {
  padding: clamp(30px, 4.4vw, 52px) 0;
}

/* ---------- 约赛登记流程 ---------- */
.page-contact .flow {
  background: var(--paper-cream);
}

.page-contact .flow .section-head {
  max-width: 46em;
}

.page-contact .steps {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .step {
  position: relative;
}

.page-contact .step__details {
  height: 100%;
  padding-top: 16px;
  border-top: 2px solid var(--grass-primary);
  transition: border-color var(--t-fast);
}

.page-contact .step__head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  list-style: none;
}

.page-contact .step__head::-webkit-details-marker {
  display: none;
}

.page-contact .step__head:focus-visible {
  outline: 2px solid var(--grass-primary);
  outline-offset: 4px;
}

.page-contact .step__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--grass-primary);
}

.page-contact .step__name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink-charcoal);
  transition: color var(--t-fast);
}

.page-contact .step__hint {
  font-size: 13px;
  line-height: 1.7;
  color: var(--neutral-moss);
}

.page-contact .step__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: var(--pc-rule);
}

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

.page-contact .step__list li {
  position: relative;
  padding-left: 13px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-contact .step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--grass-primary);
}

.page-contact .step__list strong {
  font-weight: 600;
  color: var(--ink-charcoal);
}

.page-contact .flow__figure {
  margin: clamp(32px, 4.6vw, 56px) 0 0;
}

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

.page-contact .flow__figure .media-frame-caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--neutral-moss);
}

/* ---------- 覆盖与条件 ---------- */
.page-contact .scope {
  background: var(--paper-deep);
}

.page-contact .scope .section-head {
  max-width: 52em;
}

.page-contact .scope__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  border-top: var(--pc-rule);
  border-bottom: var(--pc-rule);
}

.page-contact .scope__stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .scope__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1;
  font-weight: 500;
  color: var(--grass-primary);
}

.page-contact .scope__cap {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--neutral-moss);
}

.page-contact .scope__body {
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-contact .scope__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-contact .scope__body a {
  color: var(--grass-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .scope__body a:hover {
  color: var(--grass-light);
}

/* ---------- 响应节奏（深色区） ---------- */
.page-contact .rhythm {
  background: var(--pitch-night);
  color: var(--paper-cream);
}

.page-contact .rhythm .section-head {
  max-width: 46em;
}

.page-contact .rhythm .eyebrow {
  color: var(--volt-highlight);
}

.page-contact .rhythm h2 {
  color: var(--paper-cream);
}

.page-contact .rhythm .lede {
  color: rgba(247, 243, 232, .76);
}

.page-contact .timeline {
  margin-top: clamp(30px, 4.2vw, 48px);
}

.page-contact .timeline__row {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
}

.page-contact .timeline__node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 0 0 auto;
}

.page-contact .timeline__node--end {
  text-align: right;
}

.page-contact .timeline__cap {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(247, 243, 232, .66);
}

.page-contact .timeline__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--volt-highlight);
}

.page-contact .timeline__track {
  flex: 1 1 auto;
  min-width: 40px;
  height: 6px;
  border-radius: 3px;
  background: rgba(247, 243, 232, .16);
  overflow: hidden;
}

.page-contact .timeline__fill {
  display: block;
  width: 76%;
  height: 100%;
  background: linear-gradient(90deg, var(--grass-light), var(--volt-highlight));
}

.page-contact .timeline__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(247, 243, 232, .6);
}

.page-contact .rhythm__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(32px, 4.6vw, 52px);
  border: 1px solid rgba(247, 243, 232, .14);
  background: rgba(247, 243, 232, .14);
}

.page-contact .rhythm-card {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--pitch-night-2);
  transition: background var(--t-fast);
}

.page-contact .rhythm-card:hover {
  background: #17402d;
}

.page-contact .rhythm-card__title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper-cream);
}

.page-contact .rhythm-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(247, 243, 232, .76);
}

.page-contact .rhythm__link {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(247, 243, 232, .66);
}

.page-contact .rhythm__link a {
  color: var(--volt-highlight);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .rhythm__link a:hover {
  color: var(--paper-cream);
}

.page-contact .rhythm a:focus-visible {
  outline: 2px solid var(--volt-highlight);
  outline-offset: 3px;
}

/* ---------- 勘误提交 ---------- */
.page-contact .errata {
  background: var(--card-ivory);
}

.page-contact .errata__intro {
  padding-left: clamp(14px, 2vw, 22px);
  border-left: 2px solid var(--point-orange);
}

.page-contact .errata__intro .lede {
  max-width: 30em;
}

.page-contact .errata__intro .btn {
  display: inline-flex;
  align-items: center;
  margin-top: clamp(18px, 2.4vw, 26px);
  padding: 11px 22px;
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--t-fast), color var(--t-fast);
}

.page-contact .errata__intro .btn--primary {
  background: var(--grass-primary);
  color: var(--paper-cream);
  border: 1px solid var(--grass-primary);
}

.page-contact .errata__intro .btn--primary:hover {
  background: var(--grass-light);
  border-color: var(--grass-light);
}

.page-contact .errata__intro .btn--primary:focus-visible {
  outline: 2px solid var(--pitch-night);
  outline-offset: 2px;
}

.page-contact .errata-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: err;
  display: grid;
  gap: 1px;
  background: var(--rule-line);
  border: 1px solid var(--rule-line);
}

.page-contact .errata-list li {
  position: relative;
  margin: 0;
  padding: 16px clamp(14px, 2vw, 22px) 16px clamp(46px, 6vw, 68px);
  background: var(--card-ivory);
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink-soft);
}

.page-contact .errata-list li::before {
  counter-increment: err;
  content: counter(err, decimal-leading-zero);
  position: absolute;
  left: clamp(14px, 2vw, 22px);
  top: 18px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--point-orange);
}

.page-contact .errata-list strong {
  margin-right: 6px;
  font-weight: 600;
  color: var(--ink-charcoal);
}

.page-contact .errata .note {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding-top: 18px;
  border-top: var(--pc-rule);
  font-size: 13px;
  line-height: 1.8;
  color: var(--neutral-moss);
  max-width: 68em;
}

.page-contact .errata .note a {
  color: var(--grass-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .errata .note a:hover {
  color: var(--grass-light);
}

/* ---------- 结尾 ---------- */
.page-contact .outro {
  background: var(--paper-cream);
  border-top: var(--pc-rule);
}

.page-contact .outro__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(18px, 3vw, 36px);
}

.page-contact .outro__line {
  margin: 0;
  max-width: 34em;
  font-size: clamp(1.02rem, 2vw, 1.3rem);
  line-height: 1.62;
  color: var(--ink-charcoal);
}

.page-contact .outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .outro__actions .btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

.page-contact .outro__actions .btn--primary {
  background: var(--pitch-night);
  color: var(--paper-cream);
  border: 1px solid var(--pitch-night);
}

.page-contact .outro__actions .btn--primary:hover {
  background: var(--grass-primary);
  border-color: var(--grass-primary);
}

.page-contact .outro__actions .btn--ghost {
  background: transparent;
  color: var(--ink-charcoal);
  border: 1px solid var(--rule-line);
}

.page-contact .outro__actions .btn--ghost:hover {
  border-color: var(--grass-primary);
  color: var(--grass-primary);
}

.page-contact .outro__actions .btn:focus-visible {
  outline: 2px solid var(--grass-primary);
  outline-offset: 2px;
}

/* ---------- 悬停层级变化 ---------- */
@media (hover: hover) {
  .page-contact .step__details:hover {
    border-top-color: var(--grass-light);
  }

  .page-contact .step__details:hover .step__name {
    color: var(--grass-primary);
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-contact .contact-hero__meta {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-contact .split-cols {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-contact .scope__stats li + li {
    padding-left: clamp(16px, 2vw, 28px);
    border-left: var(--pc-rule);
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 4.6vw, 68px);
  }

  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    align-items: start;
  }

  .page-contact .step {
    padding: 0 clamp(14px, 1.8vw, 26px);
  }

  .page-contact .step:first-child {
    padding-left: 0;
  }

  .page-contact .step:last-child {
    padding-right: 0;
  }

  .page-contact .step + .step::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 22px;
    width: 7px;
    height: 7px;
    border-top: 1px solid var(--rule-line);
    border-right: 1px solid var(--rule-line);
    transform: rotate(45deg);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .mailblock__addr,
  .page-contact .mailblock .copy-btn,
  .page-contact .step__details,
  .page-contact .step__name,
  .page-contact .rhythm-card,
  .page-contact .btn,
  .page-contact .outro__actions .btn {
    transition: none;
  }
}