/* =========================================================
   page-contact · 意见反馈
   ========================================================= */

.page-contact {
  --fb-accent-content: var(--cyan);
  --fb-accent-account: var(--violet);
  --fb-accent-alert: var(--amber);
  --fb-accent-partner: var(--green);
}

/* ---------- 首屏 ---------- */
.page-contact .fb-hero {
  position: relative;
  padding-block: clamp(24px, 4.5vw, 48px) clamp(18px, 3vw, 30px);
}

.page-contact .fb-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 5.6vw, 54px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--warm);
  max-width: 22ch;
  text-wrap: balance;
}

.page-contact .section-lede {
  max-width: 56ch;
}

/* ---------- 四类入口 ---------- */
.page-contact .fb-routes {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-contact .route-block {
  --cb: var(--cyan);
  background: var(--night);
  border-radius: var(--r-md);
  border-left: 3px solid var(--cb);
  overflow: hidden;
  transition: background 200ms var(--ease);
}

.page-contact .route-block:hover {
  background: var(--panel);
}

.page-contact .route-block--content { --cb: var(--fb-accent-content); }
.page-contact .route-block--account { --cb: var(--fb-accent-account); }
.page-contact .route-block--alert   { --cb: var(--fb-accent-alert); }
.page-contact .route-block--partner { --cb: var(--fb-accent-partner); }

.page-contact .route-block__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 16px;
  align-items: center;
  padding: 18px 18px 18px 20px;
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}

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

.page-contact .route-block__tag {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cb);
}

.page-contact .route-block__title {
  grid-column: 1;
  grid-row: 2;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--warm);
}

.page-contact .route-block__cue {
  grid-column: 2;
  grid-row: 1 / span 2;
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
}

.page-contact .route-block__cue::before,
.page-contact .route-block__cue::after {
  content: "";
  position: absolute;
  background: var(--mist);
  border-radius: 2px;
}

.page-contact .route-block__cue::before { width: 11px; height: 1.5px; }
.page-contact .route-block__cue::after {
  width: 1.5px;
  height: 11px;
  transition: transform 220ms var(--ease);
}

.page-contact .route-block[open] .route-block__cue::after { transform: scaleY(0); }
.page-contact .route-block[open] .route-block__cue {
  border-color: var(--cb);
  background: color-mix(in srgb, var(--cb) 16%, transparent);
}

.page-contact .route-block__body {
  padding: 4px 18px 20px 20px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
}

.page-contact .route-block__body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .route-block__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .route-block__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .route-block__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cb);
}

/* ---------- 提交路径 ---------- */
.page-contact .channel-shell {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-contact .channel-main {
  background: var(--night);
  border-radius: var(--r-lg);
  padding: 24px 20px;
}

.page-contact .channel-main__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--warm);
}

.page-contact .channel-main__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .channel-main__hint {
  margin: 20px 0 0;
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .hint-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .hint-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .hint-num {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--line);
  font-size: 12px;
  color: var(--cyan);
}

.page-contact .channel-side {
  background: var(--panel);
  border-radius: var(--r-lg);
  padding: 22px 20px;
}

.page-contact .side-links {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .side-links a {
  display: block;
  padding: 13px 14px;
  min-height: 44px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan-soft);
  text-decoration: none;
  transition: background 180ms var(--ease), border-color 180ms var(--ease),
              transform 180ms var(--ease), color 180ms var(--ease);
}

.page-contact .side-links a:hover,
.page-contact .side-links a:focus-visible {
  background: rgba(47, 227, 214, 0.08);
  border-color: var(--cyan);
  color: var(--warm);
  transform: translateX(2px);
}

/* ---------- 直接联系 ---------- */
.page-contact .contact-direct {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

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

.page-contact .contact-rows {
  margin: 0;
  background: var(--night);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-contact .contact-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 8px 14px;
  padding: 17px 20px;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-contact .contact-row__key {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .contact-row__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.page-contact .contact-row__val.mono {
  font-size: 15px;
  letter-spacing: 0.01em;
}

.page-contact .contact-note {
  margin: 0;
  padding: 16px 18px;
  border-left: 2px solid var(--line);
  background: var(--panel);
  border-radius: var(--r-sm);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 处理顺序 ---------- */
.page-contact .flow-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-contact .flow-step {
  position: relative;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .flow-step:nth-child(2)::before { background: var(--green); }
.page-contact .flow-step:nth-child(3)::before { background: var(--amber); }

.page-contact .flow-step__num {
  display: block;
  font-size: 25px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-contact .flow-step:nth-child(2) .flow-step__num { color: var(--green); }
.page-contact .flow-step:nth-child(3) .flow-step__num { color: var(--amber); }

.page-contact .flow-step__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--warm);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .flow-media {
  margin: 30px 0 0;
}

/* ---------- 合作与授权 ---------- */
.page-contact .partner-shell {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

.page-contact .partner-main__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .partner-main__hint {
  margin: 20px 0 0;
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .partner-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .partner-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1.5px;
  background: var(--cyan);
}

.page-contact .partner-facts {
  background: var(--panel);
  border-radius: var(--r-lg);
  padding: 24px 22px;
  align-content: start;
  display: grid;
  gap: 3px;
}

.page-contact .partner-facts__num {
  margin: 0;
  font-size: clamp(30px, 6vw, 40px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-contact .partner-facts__label {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

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

/* ---------- 到访与邮寄 ---------- */
.page-contact .visit-note {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-contact .link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-contact .link:hover,
.page-contact .link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .contact-row {
    grid-template-columns: 104px minmax(0, 1fr);
    padding: 18px 26px;
  }

  .page-contact .channel-main { padding: 30px 28px; }
  .page-contact .channel-side { padding: 26px 24px; }
  .page-contact .route-block__head { padding: 20px 22px 20px 24px; }
  .page-contact .route-block__body { padding: 4px 22px 24px 24px; }
}

@media (min-width: 880px) {
  .page-contact .fb-routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .channel-shell {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 26px;
  }

  .page-contact .partner-shell {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

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

  .page-contact .flow-step {
    padding: 22px 24px 0 0;
    border-top: 0;
  }

  .page-contact .flow-step + .flow-step {
    border-left: 1px solid var(--line-soft);
    padding-left: 24px;
  }

  .page-contact .flow-step::before { top: 0; }
  .page-contact .flow-step + .flow-step::before { left: 24px; }
}

@media (min-width: 1080px) {
  .page-contact .contact-rows {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-row {
    border-bottom: 1px solid var(--line-soft);
    border-right: 1px solid var(--line-soft);
  }

  .page-contact .contact-row:nth-child(2n) { border-right: 0; }
  .page-contact .contact-row:nth-last-child(-n + 2) { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .route-block,
  .page-contact .route-block__cue::after,
  .page-contact .side-links a,
  .page-contact .link {
    transition: none;
  }
}