/* ============================================================
   反馈通道 /feedback/
   作用域：.page-contact
   ============================================================ */

.page-contact {
  --c-cut: 22px;
  --c-hair: rgba(61, 242, 212, 0.14);
  --c-hair-soft: rgba(143, 184, 174, 0.18);
  background-color: var(--night);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact .contact-lines,
.page-contact .contact-flow,
.page-contact .contact-partner,
.page-contact .contact-faq,
.page-contact .contact-scope {
  position: relative;
  padding-block: clamp(56px, 9vh, 104px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(120% 92% at 78% 0%, rgba(110, 31, 46, 0.62), transparent 62%),
    radial-gradient(78% 70% at 8% 100%, rgba(61, 242, 212, 0.13), transparent 72%),
    linear-gradient(180deg, var(--night) 0%, var(--ink) 100%);
}

.page-contact .contact-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.3;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
  filter: saturate(0.55) contrast(1.08);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  z-index: 1;
  background: linear-gradient(90deg, var(--cyan), var(--flare) 52%, rgba(61, 242, 212, 0) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(72px, 13vh, 148px) clamp(56px, 9vh, 104px);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 20em;
  font-family: var(--font-head);
  font-size: clamp(31px, 5.2vw, 58px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.015em;
  color: var(--paper);
  text-wrap: balance;
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .contact-hero__meta {
  list-style: none;
  margin: 38px 0 0;
  padding: 24px 0 0;
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--c-hair);
}

.page-contact .contact-hero__meta li {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .contact-hero__meta strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--amber);
}

/* ---------- 章节抬头 ---------- */

.page-contact .section-head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-contact .section-head__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .section-head__note {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 联系客服 ---------- */

.page-contact .contact-lines {
  background: linear-gradient(180deg, rgba(11, 31, 26, 0) 0%, rgba(18, 53, 44, 0.42) 100%);
}

.page-contact .contact-lines__grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

.page-contact .contact-card,
.page-contact .contact-brief,
.page-contact .partner-card {
  padding: clamp(22px, 3vw, 38px);
}

.page-contact .contact-row {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-hair-soft);
}

.page-contact .contact-row:first-child {
  padding-top: 0;
}

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

.page-contact .contact-row__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .contact-row__key::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 9px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-contact .contact-row__val {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .contact-row__val--mail {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.7vw, 19px);
  color: var(--cyan);
}

.page-contact .contact-row__note {
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .contact-brief__title {
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .brief-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: brief;
}

.page-contact .brief-list li {
  counter-increment: brief;
  position: relative;
  padding: 13px 0 13px 44px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  border-bottom: 1px dashed rgba(61, 242, 212, 0.16);
}

.page-contact .brief-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .brief-list li::before {
  content: counter(brief, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--flare);
}

/* ---------- 处理流程 ---------- */

.page-contact .contact-flow {
  background: linear-gradient(180deg, rgba(5, 11, 9, 0.92) 0%, rgba(11, 31, 26, 0.5) 100%);
  border-block: 1px solid var(--c-hair);
}

.page-contact .flow-rail {
  list-style: none;
  margin: 0 0 clamp(34px, 5vw, 58px);
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-contact .flow-step {
  position: relative;
  padding: 22px 20px 26px;
  border-top: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(18, 53, 44, 0.88) 0%, rgba(11, 31, 26, 0.3) 100%);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-contact .flow-step__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--flare);
}

.page-contact .flow-step__title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

.page-contact .contact-flow__figure {
  margin: 0;
}

.page-contact .contact-flow__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

/* ---------- 合作与收录 ---------- */

.page-contact .partner-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

.page-contact .partner-card__title {
  margin: 16px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .partner-card > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(244, 247, 245, 0.86);
}

.page-contact .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .partner-list li {
  position: relative;
  padding: 9px 0 9px 22px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 11px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 常见问题 ---------- */

.page-contact .contact-faq {
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.55) 0%, rgba(5, 11, 9, 0.4) 100%);
}

.page-contact .qa-group {
  border-top: 1px solid var(--c-hair);
}

.page-contact .qa {
  border-bottom: 1px solid var(--c-hair);
}

.page-contact .qa__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 20px 2px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.2s ease;
}

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

.page-contact .qa__sign {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.page-contact .qa__sign::before,
.page-contact .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-contact .qa__sign::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.page-contact .qa__sign::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-contact .qa__btn[aria-expanded="true"] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-contact .qa__panel {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.3s ease;
}

.page-contact .qa__panel[data-open="false"] {
  grid-template-rows: 0fr;
}

.page-contact .qa__inner {
  overflow: hidden;
  min-height: 0;
}

.page-contact .qa__inner p {
  margin: 0 0 20px;
  max-width: 74ch;
  padding-right: 34px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 服务范围与轮值 ---------- */

.page-contact .contact-scope {
  background: linear-gradient(180deg, rgba(11, 31, 26, 0) 0%, rgba(5, 11, 9, 0.88) 100%);
}

.page-contact .scope-panel {
  padding: clamp(26px, 4vw, 48px);
  background:
    linear-gradient(128deg, rgba(110, 31, 46, 0.42) 0%, rgba(11, 31, 26, 0.92) 58%),
    var(--panel);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.page-contact .scope-panel h2 {
  margin: 10px 0 16px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .scope-panel > p {
  margin: 0 0 30px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}

.page-contact .scope-panel strong {
  font-weight: 700;
  color: var(--amber);
}

.page-contact .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
}

.page-contact .route-list li {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-top: 1px solid var(--c-hair);
}

.page-contact .route-list a {
  width: fit-content;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

.page-contact .route-list span {
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 中等宽度 ---------- */

@media (min-width: 700px) {
  .page-contact .contact-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 34px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 860px) {
  .page-contact .contact-lines__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

  .page-contact .flow-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-contact .flow-step {
    border-left: 1px solid var(--c-hair);
    padding: 24px 22px 30px;
  }

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

  .page-contact .flow-step:nth-child(even) {
    transform: translateY(20px);
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-hero__title {
    letter-spacing: 0.02em;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact .qa__panel,
  .page-contact .qa__sign::before,
  .page-contact .qa__sign::after,
  .page-contact .qa__btn,
  .page-contact .route-list a {
    transition: none;
  }

  .page-contact .flow-step:nth-child(even) {
    transform: none;
  }
}