/* ===== 意见反馈页 · 页面专属样式（作用域 .page-contact） ===== */

.page-contact {
  display: block;
  background-color: var(--paper);
  color: var(--graphite);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ---------- 顶部版本对照条 ---------- */

.page-contact .version-bar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(11, 18, 32, 0.34);
}

.page-contact .version-bar__inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

@media (min-width: 900px) {
  .page-contact .version-bar__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
}

.page-contact .version-bar__lead {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.page-contact .live-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  animation: pc-breathe 1.6s ease-in-out infinite;
}

@keyframes pc-breathe {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(184, 255, 60, 0.5);
    opacity: 1;
  }
  50% {
    box-shadow: 0 0 0 7px rgba(184, 255, 60, 0);
    opacity: 0.7;
  }
}

.page-contact .version-bar__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon);
  line-height: 1.4;
}

.page-contact .version-bar__current {
  margin: 3px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-contact .version-bar__details {
  position: relative;
  flex: 0 0 auto;
}

.page-contact .version-bar__summary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--ink-2);
  color: var(--white);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.page-contact .version-bar__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--orange);
}

.page-contact .version-bar__details[open] .version-bar__summary::after {
  content: "–";
}

.page-contact .version-bar__summary:hover,
.page-contact .version-bar__summary:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
}

.page-contact .version-bar__panel {
  margin-top: 12px;
  padding: 18px;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

@media (min-width: 900px) {
  .page-contact .version-bar__panel {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    width: min(640px, 72vw);
    margin-top: 0;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }
}

.page-contact .version-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.page-contact .version-table caption {
  text-align: left;
  padding-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-contact .version-table th,
.page-contact .version-table td {
  text-align: left;
  padding: 9px 10px 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.6;
  vertical-align: top;
}

.page-contact .version-table th {
  color: var(--white);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: 0.12em;
}

.page-contact .version-table td.num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon);
  white-space: nowrap;
}

.page-contact .version-bar__hint {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 首屏 ---------- */

.page-contact .hero {
  background: var(--paper);
  padding: clamp(28px, 4vw, 44px) 0 clamp(48px, 7vw, 88px);
}

.page-contact .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #6b7280;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-contact .breadcrumb__item a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .breadcrumb__item a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

.page-contact .breadcrumb__sep {
  margin: 0 9px;
  color: #b3afa4;
}

.page-contact .hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

@media (min-width: 880px) {
  .page-contact .hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(40px, 6vw, 80px);
    align-items: end;
  }
}

.page-contact .hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-contact .hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 6.2vw, 64px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--graphite);
}

.page-contact .hero__lede {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: #4a5262;
}

.page-contact .hero__quick {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(20, 24, 31, 0.16);
}

.page-contact .hero__quick li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(20, 24, 31, 0.16);
  font-size: 13px;
}

.page-contact .hero__quick-key {
  color: #6b7280;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-contact .hero__quick-val {
  color: var(--graphite);
  text-align: right;
  line-height: 1.5;
}

.page-contact .hero__figure {
  position: relative;
  margin: 0;
}

.page-contact .hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--paper-2);
}

.page-contact .hero__figure::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 34px;
  width: 56px;
  height: 3px;
  background: var(--red);
}

.page-contact .hero__caption {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: #7a8291;
}

/* ---------- 提交前准备清单 ---------- */

.page-contact .prep {
  background: var(--paper-2);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-contact .prep__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

@media (min-width: 760px) {
  .page-contact .prep__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    align-items: end;
    gap: 44px;
  }
}

.page-contact .prep__title {
  margin: 0;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  color: var(--graphite);
}

.page-contact .prep__aside {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: #5a6270;
}

.page-contact .prep__list {
  display: grid;
}

.page-contact .prep-row {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 18px 12px;
  border-bottom: 1px solid rgba(20, 24, 31, 0.16);
  border-left: 3px solid transparent;
  transition: background-color var(--dur) var(--ease), border-left-color var(--dur) var(--ease);
}

.page-contact .prep-row:first-child {
  border-top: 1px solid rgba(20, 24, 31, 0.16);
}

.page-contact .prep-row:hover,
.page-contact .prep-row:focus-within {
  background: rgba(255, 255, 255, 0.48);
  border-left-color: var(--neon);
}

.page-contact .prep-row__num {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--red);
  padding-top: 3px;
}

.page-contact .prep-row__name {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-contact .prep-row__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #5a6270;
}

@media (min-width: 780px) {
  .page-contact .prep-row {
    grid-template-columns: 38px minmax(0, 180px) minmax(0, 1fr);
    align-items: baseline;
    gap: 32px;
    padding: 21px 16px;
  }

  .page-contact .prep-row__num {
    grid-row: auto;
    padding-top: 0;
  }
}

.page-contact .prep__foot {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #5a6270;
  max-width: 62ch;
}

.page-contact .prep__foot a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 50, 43, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .prep__foot a:hover {
  border-bottom-color: var(--red);
}

/* ---------- 联系渠道 ---------- */

.page-contact .channels {
  background: var(--paper);
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-contact .channels__grid {
  display: grid;
  gap: clamp(36px, 5vw, 68px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-contact .channels__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

.page-contact .channels__title {
  margin: 0;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  color: var(--graphite);
}

.page-contact .channels__lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: #4a5262;
}

.page-contact .contact-dl {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border-top: 1px solid rgba(20, 24, 31, 0.2);
}

.page-contact .contact-dl__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(20, 24, 31, 0.2);
}

@media (min-width: 620px) {
  .page-contact .contact-dl__row {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-contact .contact-dl__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: #6b7280;
}

.page-contact .contact-dl__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
  overflow-wrap: anywhere;
}

.page-contact .contact-dl__val--mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
}

.page-contact .channels__note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  max-width: 58ch;
  font-size: 13px;
  line-height: 1.85;
  color: #5a6270;
}

.page-contact .channels__note a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 50, 43, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .channels__note a:hover {
  border-bottom-color: var(--red);
}

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

.page-contact .channels__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--paper-2);
}

.page-contact .channels__caption {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: #7a8291;
}

/* ---------- 合作洽谈 ---------- */

.page-contact .partner {
  background: var(--paper-2);
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-contact .partner__title {
  margin: 0;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  color: var(--graphite);
}

.page-contact .partner__lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: #4a5262;
}

.page-contact .partner__cols {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-contact .partner__col {
  padding: 20px 0 18px;
  border-top: 2px solid var(--graphite);
  border-bottom: 1px solid rgba(20, 24, 31, 0.14);
}

.page-contact .partner__col-title {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-contact .partner__col-text {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #5a6270;
}

@media (min-width: 820px) {
  .page-contact .partner__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 38px;
  }

  .page-contact .partner__col {
    padding: 20px 0 0;
    border-bottom: none;
  }
}

.page-contact .partner__prep {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(24px, 3vw, 34px);
  border-top: 1px solid rgba(20, 24, 31, 0.2);
}

.page-contact .partner__prep-title {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-contact .partner__prep-list {
  list-style: none;
  display: grid;
  gap: 10px 30px;
  margin: 18px 0 0;
  padding: 0;
}

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

.page-contact .partner__prep-list li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.75;
  color: #5a6270;
}

.page-contact .partner__prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-contact .partner__prep-note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: #5a6270;
}

/* ---------- 收尾（8° 斜切进入深墨区） ---------- */

.page-contact .closing {
  position: relative;
  background: var(--ink);
  color: var(--muted);
  padding: clamp(88px, 11vw, 148px) 0 clamp(56px, 7vw, 88px);
}

.page-contact .closing::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: clamp(44px, 6vw, 86px);
  background: var(--paper-2);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

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

.page-contact .closing__title {
  margin: 0;
  font-size: clamp(26px, 4.2vw, 42px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-contact .closing__text {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(26px, 3.5vw, 38px);
}

.page-contact .closing__note {
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  max-width: 62ch;
  font-size: 12.5px;
  line-height: 1.8;
  color: #7c8798;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .live-dot {
    animation: none;
  }
}