/* ===== 合作与联系 / page-contact ===== */
.page-contact {
  --c-panel-w: 320px;
  --c-gap: clamp(20px, 3vw, 40px);
  --c-cut: 22px;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-contact .contact-crumbs {
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12.5px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  margin-top: 14px;
  padding: clamp(24px, 4vw, 48px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -25% -12% 0 -12%;
  background:
    radial-gradient(58% 68% at 6% 8%, rgba(18, 58, 51, 0.88) 0%, rgba(18, 58, 51, 0) 62%),
    radial-gradient(48% 58% at 98% 92%, rgba(47, 224, 138, 0.11) 0%, rgba(47, 224, 138, 0) 66%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-contact .contact-hero__kicker {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-contact .contact-hero__copy h1 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4.8vw, 3.5rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 16em;
}

.page-contact .contact-hero__lead {
  margin: 0 0 26px;
  max-width: 34em;
  font-size: clamp(15px, 1.15vw, 16.5px);
  line-height: 1.8;
  color: var(--text);
}

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

.page-contact .contact-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 580px;
}

.page-contact .contact-facts li {
  background: rgba(16, 19, 24, 0.86);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-contact .contact-facts .num {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--yellow);
  letter-spacing: -0.02em;
}

.page-contact .contact-facts__k {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #8b949e;
}

.page-contact .contact-hero__figure {
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 15% 100%, 0 80%);
}

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

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 48px);
  padding-top: clamp(30px, 5vw, 64px);
}

.page-contact .contact-main {
  display: grid;
  gap: clamp(42px, 6vw, 82px);
  min-width: 0;
}

.page-contact .contact-section {
  min-width: 0;
  scroll-margin-top: calc(var(--hdr-h) + 26px);
}

/* ---------- 粘性联系面板 ---------- */
.page-contact .contact-panel {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  box-shadow: var(--shadow);
  padding: 22px 20px 20px;
}

.page-contact .contact-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--yellow) 0%, rgba(233, 255, 60, 0) 100%);
}

.page-contact .cp-title {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-contact .cp-row {
  border-top: 1px solid var(--line-soft);
  padding: 12px 0 10px;
}

.page-contact .cp-row__k {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #79828c;
}

.page-contact .cp-row__v {
  display: block;
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
  word-break: break-all;
  user-select: all;
}

.page-contact .cp-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: #8b949e;
}

.page-contact .cp-status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--green);
}

.page-contact .cp-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(47, 224, 138, 0.14);
}

/* ---------- 合作方式卡 ---------- */
.page-contact .coop-list {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .coop-card {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(27, 32, 39, 0.92) 0%, rgba(22, 27, 33, 0.92) 100%);
  padding: 22px 36px 24px 22px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-contact .coop-card::before,
.page-contact .coop-card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  pointer-events: none;
}

.page-contact .coop-card::before {
  width: calc(var(--c-cut) + 2px);
  height: calc(var(--c-cut) + 2px);
  background: var(--line);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  transition: background-color 0.22s ease;
}

.page-contact .coop-card::after {
  width: calc(var(--c-cut) + 1px);
  height: calc(var(--c-cut) + 1px);
  background: var(--ink);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-contact .coop-card:hover,
.page-contact .coop-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--yellow);
  box-shadow: var(--shadow);
}

.page-contact .coop-card:hover::before,
.page-contact .coop-card:focus-within::before {
  background: var(--yellow);
}

.page-contact .coop-card__num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--yellow);
}

.page-contact .coop-card__title {
  margin: 6px 0 6px;
  font-size: clamp(1.1rem, 1.7vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .coop-card__for {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #8b949e;
}

.page-contact .coop-card__body {
  margin: 0 0 16px;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .coop-card__body a {
  color: var(--yellow-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-card__body a:hover {
  color: var(--yellow);
}

.page-contact .coop-card__media {
  margin: 0 0 16px;
  border: 1px solid var(--line);
  overflow: hidden;
}

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

.page-contact .coop-card__meta {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-contact .coop-card__meta > div {
  background: rgba(16, 19, 24, 0.74);
  padding: 10px 12px;
}

.page-contact .coop-card__meta dt {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6f7883;
}

.page-contact .coop-card__meta dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

/* ---------- 四步流程 ---------- */
.page-contact .steps {
  list-style: none;
  position: relative;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0 0 0 44px;
}

.page-contact .steps::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--yellow) 0%, var(--line) 58%, rgba(42, 49, 56, 0) 100%);
}

.page-contact .step {
  position: relative;
  padding-bottom: 26px;
}

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

.page-contact .step__dot {
  position: absolute;
  left: -44px;
  top: -2px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--yellow);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.page-contact .step:hover .step__dot {
  border-color: var(--yellow);
  background: rgba(233, 255, 60, 0.08);
  transform: translateY(-1px);
}

.page-contact .step__title {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--white);
}

.page-contact .step__body {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .step__need {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #8b949e;
}

/* ---------- 三条对接路径 ---------- */
.page-contact .channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(22px, 3vw, 32px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .channel {
  background: var(--panel-2);
  padding: 22px 20px 24px;
}

.page-contact .channel__k {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-contact .channel__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
}

.page-contact .channel__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .channel__body .mono {
  color: var(--yellow-soft);
  word-break: break-all;
}

/* ---------- 勘误通道 ---------- */
.page-contact .errata {
  position: relative;
  margin-top: clamp(22px, 3vw, 32px);
  border: 1px solid rgba(255, 75, 62, 0.42);
  background:
    linear-gradient(180deg, rgba(255, 75, 62, 0.07) 0%, rgba(255, 75, 62, 0) 64%),
    var(--panel);
  padding: 24px 22px 26px;
}

.page-contact .errata::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--red);
}

.page-contact .errata__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

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

.page-contact .errata__fields li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .errata__fields li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--red);
}

.page-contact .errata__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: #9aa3ad;
}

.page-contact .errata__note a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作方画像 ---------- */
.page-contact .profiles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-contact .profile {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel-2);
  padding: 22px 18px 22px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-contact .profile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--green);
}

.page-contact .profile:hover {
  transform: translateY(-2px);
  border-color: rgba(47, 224, 138, 0.5);
}

.page-contact .profile__title {
  margin: 10px 0 14px;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--white);
}

.page-contact .profile__row {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-contact .profile__row span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
}

/* ---------- 页内跳转链接 ---------- */
.page-contact .inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 26px 0 0;
  font-size: 13.5px;
}

.page-contact .inline-links a {
  color: var(--yellow-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(233, 255, 60, 0.35);
  padding-bottom: 1px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-contact .inline-links a:hover {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-contact .contact-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .profiles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .errata__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 34px;
  }
}

@media (min-width: 860px) {
  .page-contact .coop-list {
    gap: 18px;
  }

  .page-contact .coop-card:nth-child(1) {
    margin-right: 15%;
  }

  .page-contact .coop-card:nth-child(2) {
    margin-left: 9%;
    margin-right: 3%;
  }

  .page-contact .coop-card:nth-child(3) {
    margin-right: 19%;
  }

  .page-contact .coop-card:nth-child(4) {
    margin-left: 6%;
    margin-right: 7%;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-body {
    grid-template-columns: var(--c-panel-w) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 64px);
    align-items: start;
  }

  .page-contact .contact-panel {
    position: sticky;
    top: calc(var(--hdr-h) + 26px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}