/* ==========================================================================
   page-contact — 联系与反馈
   全部页面专属选择器限定在 .page-contact 作用域内
   ========================================================================== */

.page-contact {
  --pc-space: clamp(36px, 5.5vw, 76px);
  --pc-gap: clamp(14px, 2.2vw, 24px);
  background: var(--warm);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 通用小节 ---------- */

.page-contact .pc-section {
  padding: var(--pc-space) 0;
}

.page-contact .section-head {
  max-width: 740px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .section-kicker {
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.2;
  color: var(--cinnabar);
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 4px solid var(--cinnabar);
}

.page-contact .section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 0 0 12px;
  color: inherit;
}

.page-contact .section-lead {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 62ch;
}

/* ---------- 首屏标题带 ---------- */

.page-contact .contact-band {
  position: relative;
  overflow: hidden;
}

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

.page-contact .contact-band::before,
.page-contact .contact-band::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.page-contact .contact-band::before {
  width: 300px;
  height: 300px;
  right: -100px;
  top: -130px;
  border: 2px solid rgba(201, 162, 75, .38);
}

.page-contact .contact-band::after {
  width: 180px;
  height: 180px;
  right: 70px;
  bottom: -120px;
  border: 2px solid rgba(196, 54, 42, .48);
}

.page-contact .contact-band h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
  margin: 0 0 16px;
  max-width: 18ch;
}

.page-contact .contact-band .page-band__lead {
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.82;
}

.page-contact .contact-band .breadcrumb {
  margin-top: 24px;
}

.page-contact .crumb-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-num);
  font-size: 13.5px;
}

.page-contact .crumb-list li {
  display: flex;
  align-items: center;
}

.page-contact .crumb-list li + li::before {
  content: "/";
  margin: 0 10px;
  color: rgba(246, 241, 231, .4);
}

.page-contact .crumb-list a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 75, .5);
}

.page-contact .crumb-list a:hover,
.page-contact .crumb-list a:focus-visible {
  border-bottom-color: var(--gold);
}

.page-contact .crumb-current {
  color: rgba(246, 241, 231, .72);
}

/* ---------- 四条通道：横向选项卡 ---------- */

.page-contact .channel-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: visible;
  padding: 2px 4px 12px 2px;
  margin: 0;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-contact .ch-tab {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: var(--border);
  background: var(--warm);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: var(--shadow-hard-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
              background-color .18s var(--ease), color .18s var(--ease);
}

.page-contact .ch-tab__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cinnabar);
  transition: color .18s var(--ease);
}

.page-contact .ch-tab:hover,
.page-contact .ch-tab:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lift);
}

.page-contact .channel-section:has(#ch-fix:target) .ch-tab[href="#ch-fix"],
.page-contact .channel-section:has(#ch-line:target) .ch-tab[href="#ch-line"],
.page-contact .channel-section:has(#ch-use:target) .ch-tab[href="#ch-use"],
.page-contact .channel-section:has(#ch-partner:target) .ch-tab[href="#ch-partner"] {
  background: var(--cinnabar);
  color: var(--warm);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-sm);
}

.page-contact .channel-section:has(#ch-fix:target) .ch-tab[href="#ch-fix"] .ch-tab__num,
.page-contact .channel-section:has(#ch-line:target) .ch-tab[href="#ch-line"] .ch-tab__num,
.page-contact .channel-section:has(#ch-use:target) .ch-tab[href="#ch-use"] .ch-tab__num,
.page-contact .channel-section:has(#ch-partner:target) .ch-tab[href="#ch-partner"] .ch-tab__num {
  color: var(--gold);
}

/* 通道面板 */

.page-contact .channel-panels {
  margin-top: 8px;
}

.page-contact .ch-panel {
  border: var(--border);
  background: var(--warm);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3vw, 32px);
  scroll-margin-top: 140px;
}

.page-contact .ch-panel + .ch-panel {
  margin-top: 22px;
}

.page-contact .ch-panel h3 {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.3vw, 25px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.005em;
  margin: 0 0 12px;
}

.page-contact .ch-panel > p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 68ch;
}

.page-contact .ch-panel a {
  color: var(--cinnabar);
  font-weight: 700;
  text-underline-offset: 3px;
}

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

.page-contact .mini-list li {
  padding-left: 16px;
  border-left: 3px solid var(--sand);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-contact .mini-list span {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cinnabar);
}

@keyframes pc-panel-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

@supports selector(:has(*)) {
  .page-contact .channel-panels:has(:target) .ch-panel {
    display: none;
    margin-top: 0;
  }
  .page-contact .channel-panels:has(:target) .ch-panel:target {
    display: block;
    animation: pc-panel-in .32s var(--ease) both;
  }
  .page-contact .channel-panels:not(:has(:target)) .ch-panel {
    display: none;
    margin-top: 0;
  }
  .page-contact .channel-panels:not(:has(:target)) #ch-fix {
    display: block;
  }
}

/* ---------- 图片 ---------- */

.page-contact .pc-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-contact .pc-figure .media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border);
  box-shadow: var(--shadow-hard);
}

.page-contact .shot-a { aspect-ratio: 3 / 2; }
.page-contact .shot-b { aspect-ratio: 4 / 3; }

.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .pc-figure .figure-note {
  margin: 12px 0 0;
  font-family: var(--font-num);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-contact .shot-section {
  padding-top: 0;
}

/* ---------- 联系渠道：夜蓝底三张错落卡片 ---------- */

.page-contact .reach-section {
  background: var(--night);
  color: var(--warm);
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
}

.page-contact .reach-section .section-kicker {
  color: var(--gold);
  border-left-color: var(--gold);
}

.page-contact .reach-section .section-head h2 {
  color: var(--warm);
}

.page-contact .reach-section .section-lead {
  color: rgba(246, 241, 231, .78);
}

.page-contact .contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  background: var(--warm);
  color: var(--ink);
  border: var(--border);
  box-shadow: 6px 6px 0 rgba(201, 162, 75, .55);
  padding: clamp(18px, 2.6vw, 28px);
}

.page-contact .contact-card__label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cinnabar);
}

.page-contact .contact-card__value {
  margin: 0 0 14px;
  padding-bottom: 14px;
  border-bottom: 3px solid var(--gold);
  font-family: var(--font-num);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
  color: var(--night);
}

.page-contact .contact-card__desc {
  flex: 1 1 auto;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--ink);
}

.page-contact .contact-card__desc a {
  color: var(--cinnabar);
  font-weight: 700;
  text-underline-offset: 3px;
}

.page-contact .contact-card__meta {
  margin: 16px 0 0;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--celadon);
}

/* ---------- 两类来信三要素 ---------- */

.page-contact .write-grid {
  align-items: start;
}

.page-contact .write-card {
  background: var(--warm);
  border: var(--border);
  border-top: 6px solid var(--cinnabar);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 2.8vw, 30px);
}

.page-contact .write-card--line {
  border-top-color: var(--celadon);
}

.page-contact .write-card h3 {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.4;
  margin: 14px 0 20px;
}

.page-contact .num-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .num-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-contact .num-list__idx {
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.3;
  color: var(--warm);
  background: var(--night);
  padding: 4px 8px;
}

.page-contact .num-list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .num-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 合作洽谈 ---------- */

.page-contact .partner-section {
  background: var(--night-2);
  color: var(--warm);
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
}

.page-contact .partner-section .section-kicker {
  color: var(--gold);
  border-left-color: var(--gold);
}

.page-contact .partner-section h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 0 0 14px;
  color: var(--warm);
}

.page-contact .partner-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-contact .partner-copy > p {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.82;
  color: rgba(246, 241, 231, .82);
}

.page-contact .partner-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .partner-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(246, 241, 231, .82);
}

.page-contact .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-contact .partner-list strong {
  color: var(--warm);
  font-weight: 800;
}

.page-contact .partner-note {
  margin: 0;
  padding-top: 18px;
  border-top: 2px solid rgba(246, 241, 231, .22);
  font-size: 15px;
  line-height: 1.76;
  color: rgba(246, 241, 231, .72);
}

.page-contact .partner-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: 2px solid rgba(246, 241, 231, .24);
  background: rgba(246, 241, 231, .24);
}

.page-contact .partner-stat {
  background: var(--night-2);
  padding: clamp(16px, 2vw, 22px);
}

.page-contact .partner-stat__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-contact .partner-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.55;
  color: rgba(246, 241, 231, .74);
}

/* ---------- 处理顺序 ---------- */

.page-contact .flow-section {
  background: var(--sand);
}

.page-contact .flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: stretch;
}

.page-contact .flow-step {
  background: var(--warm);
  border: var(--border);
  box-shadow: var(--shadow-hard-sm);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-contact .flow-step__num {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--warm);
  background: var(--cinnabar);
}

.page-contact .flow-step h3 {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink);
}

.page-contact .flow-step a {
  color: var(--cinnabar);
  font-weight: 700;
  text-underline-offset: 3px;
}

.page-contact .flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  color: var(--cinnabar);
  transform: rotate(90deg);
  padding: 3px 0;
}

.page-contact .flow-arrow svg {
  display: block;
  width: 34px;
  height: 17px;
  flex: 0 0 auto;
}

.page-contact .flow-arrow polygon {
  fill: currentColor;
}

.page-contact .flow-note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-top: 20px;
  border-top: 2px solid rgba(18, 22, 28, .16);
  font-size: 15px;
  line-height: 1.76;
  color: var(--ink);
  max-width: 74ch;
}

.page-contact .flow-note a {
  color: var(--cinnabar);
  font-weight: 700;
  text-underline-offset: 3px;
}

/* ---------- 焦点可见性 ---------- */

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

/* ---------- 平板 ---------- */

@media (min-width: 700px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-card:nth-child(2) {
    margin-top: 30px;
  }

  .page-contact .contact-card:nth-child(3) {
    grid-column: 1 / -1;
    margin-top: 4px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 1000px) {
  .page-contact .channel-tabs {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    overflow: visible;
    padding-bottom: 4px;
  }

  .page-contact .ch-tab {
    justify-content: flex-start;
  }

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

  .page-contact .contact-card:nth-child(1) { margin-top: 0; }
  .page-contact .contact-card:nth-child(2) { margin-top: 38px; }
  .page-contact .contact-card:nth-child(3) {
    grid-column: auto;
    margin-top: 14px;
  }

  .page-contact .partner-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .flow {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 0;
  }

  .page-contact .flow-arrow {
    transform: none;
    padding: 0 10px;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact .ch-tab {
    transition: none;
    transform: none;
    box-shadow: var(--shadow-hard-sm);
  }

  .page-contact .ch-tab:hover,
  .page-contact .ch-tab:focus-visible {
    transform: none;
  }

  .page-contact .channel-section:has(#ch-fix:target) .ch-tab[href="#ch-fix"],
  .page-contact .channel-section:has(#ch-line:target) .ch-tab[href="#ch-line"],
  .page-contact .channel-section:has(#ch-use:target) .ch-tab[href="#ch-use"],
  .page-contact .channel-section:has(#ch-partner:target) .ch-tab[href="#ch-partner"] {
    transform: none;
  }

  .page-contact .channel-panels .ch-panel:target {
    animation: none;
  }
}