/* =========================================================
   反馈通道 /feedback/ —— 页面专属样式
   作用域：.page-contact
   ========================================================= */

.page-contact {
  --pc-pad: clamp(2.75rem, 7vw, 5.5rem);
  --pc-cut: 18px;
  --pc-accent: var(--orange);
  display: block;
  background: var(--void);
  color: var(--cream);
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  padding-block: clamp(0.85rem, 2vw, 1.5rem);
}

.page-contact .crumbs__list {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--slate);
}

/* ---------- 首屏 ---------- */
.contact-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(1.25rem, 3.5vw, 2.25rem) var(--pc-pad);
  background: linear-gradient(152deg, var(--deep) 0%, var(--void) 70%);
}

.contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(115deg, transparent 0 38px, rgba(41, 224, 208, 0.08) 38px 39px),
    repeating-linear-gradient(25deg, transparent 0 64px, rgba(255, 106, 22, 0.05) 64px 65px);
}

.contact-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4.5vw, 2.5rem);
  align-items: center;
}

.contact-hero__title {
  margin: 0.7rem 0 1rem;
  max-width: 14ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.05rem, 6.4vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--bright);
}

.contact-hero__lead {
  margin: 0 0 1.6rem;
  max-width: 48ch;
  font-size: clamp(0.97rem, 2.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--slate);
}

.contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-hero__note {
  margin: 1.15rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.contact-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 2 / 1;
  border: 1px solid var(--line);
  background: var(--deep);
  overflow: hidden;
  clip-path: polygon(
    0 0,
    calc(100% - var(--pc-cut)) 0,
    100% var(--pc-cut),
    100% 100%,
    var(--pc-cut) 100%,
    0 calc(100% - var(--pc-cut))
  );
}

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

.contact-hero__figure .figure__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.45rem 0.85rem;
  background: var(--orange);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}

/* ---------- 章节索引条 ---------- */
.contact-index {
  position: sticky;
  top: var(--header-h);
  z-index: 12;
  background: rgba(6, 11, 24, 0.94);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.contact-index:empty {
  display: none;
}

.contact-index .toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.35rem;
  margin: 0;
  padding: 0.7rem 0;
  list-style: none;
}

/* ---------- 通用区块 ---------- */
.contact-section {
  padding-block: var(--pc-pad);
  border-top: 1px solid var(--line);
}

.contact-section--topics,
.contact-section--channels,
.contact-section--flow {
  background: var(--void);
}

.contact-head {
  display: grid;
  gap: 0.7rem;
  max-width: 64ch;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.contact-head .h-slant {
  margin: 0;
  font-size: clamp(1.45rem, 3.4vw, 2.5rem);
  line-height: 1.22;
  color: var(--bright);
}

.contact-head__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 问题类型卡片 ---------- */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.topic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.35rem 1.35rem 1.5rem;
  background: var(--deep);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  color: inherit;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, 0 100%);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.topic-card:hover,
.topic-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background-image: linear-gradient(rgba(41, 224, 208, 0.07), rgba(41, 224, 208, 0.07));
}

.topic-card--alert {
  border-left-color: var(--magenta);
}

.topic-card--alert:hover,
.topic-card--alert:focus-visible {
  border-color: var(--magenta);
  background-image: linear-gradient(rgba(255, 46, 126, 0.07), rgba(255, 46, 126, 0.07));
}

.topic-card__idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.topic-card__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bright);
}

.topic-card__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--slate);
}

.topic-card__go {
  margin-top: auto;
  padding-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--cyan);
  transition: transform 220ms var(--ease);
}

.topic-card--alert .topic-card__go {
  color: var(--magenta);
}

.topic-card:hover .topic-card__go,
.topic-card:focus-visible .topic-card__go {
  transform: translateX(4px);
}

/* ---------- 联系途径卡 ---------- */
.channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}

.channel-card {
  position: relative;
  padding: 1.65rem 1.5rem 1.75rem;
  background: var(--deep);
  border: 1px solid var(--line);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, 0 100%);
}

.channel-card--email { --pc-accent: var(--orange); }
.channel-card--phone { --pc-accent: var(--cyan); }
.channel-card--address { --pc-accent: var(--magenta); }

.channel-card__bar {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--pc-accent);
}

.channel-card__idx {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--pc-accent);
}

.channel-card__title {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bright);
}

.channel-card__value {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2.4vw, 1.02rem);
  line-height: 1.6;
  color: var(--bright);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.channel-card__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--slate);
}

.channel-card__meta {
  margin: 1.1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}

/* ---------- 提交清单（奶油纸面） ---------- */
.contact-section--checklist {
  background: var(--cream);
  color: var(--umber);
  border-top-color: var(--cream);
}

.contact-section--checklist .contact-head .h-slant {
  color: var(--umber);
}

.contact-section--checklist .contact-head__lead {
  color: rgba(36, 22, 16, 0.74);
}

.checklist-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.checklist {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist__item {
  display: flex;
  gap: 0.85rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed rgba(36, 22, 16, 0.22);
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(36, 22, 16, 0.86);
}

.checklist__item strong {
  font-weight: 700;
  color: var(--umber);
}

.checklist__box {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--orange);
}

.checklist-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid rgba(36, 22, 16, 0.18);
  background: var(--bright);
  overflow: hidden;
  clip-path: polygon(
    0 0,
    calc(100% - var(--pc-cut)) 0,
    100% var(--pc-cut),
    100% 100%,
    var(--pc-cut) 100%,
    0 calc(100% - var(--pc-cut))
  );
}

.checklist-figure .figure__media {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 处理进度 ---------- */
.flow-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 1.15rem;
  align-items: start;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

.flow-item:last-child {
  border-bottom: 1px solid var(--line);
}

.flow-item__step {
  padding-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.flow-item__title {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--bright);
}

.flow-item__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--slate);
}

.flow-item__time {
  grid-column: 1 / -1;
  padding-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

/* ---------- 合作与内容协作 ---------- */
.contact-section--partner {
  background: var(--deep);
}

.partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.partner-lead {
  margin: 0 0 1.1rem;
  font-size: 0.99rem;
  line-height: 1.85;
  color: var(--slate);
}

.partner-mail {
  color: var(--bright);
  font-family: var(--font-mono);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.partner-copy .btn {
  margin-top: 0.4rem;
}

.partner-panel {
  padding: 1.65rem 1.5rem 1.75rem;
  background: var(--void);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
}

.partner-panel__title {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--bright);
}

.partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.partner-list li {
  display: flex;
  gap: 0.75rem;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--cream);
}

.partner-list li::before {
  content: "◆";
  flex: 0 0 auto;
  font-size: 0.62rem;
  line-height: 2.7;
  color: var(--orange);
}

.partner-panel__note {
  margin: 1.35rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 站点与备案 ---------- */
.contact-section--site {
  background: var(--void);
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3rem, 8vw, 5.5rem);
}

.site-meta {
  display: grid;
  justify-items: center;
  gap: 0.55rem;
  padding: 1.7rem 1rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.site-meta__brand {
  margin: 0;
  font-size: 0.97rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--bright);
}

.site-meta__icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.site-meta__note {
  margin: 0;
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 640px) {
  .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2rem;
  }
}

@media (min-width: 760px) {
  .flow-item {
    grid-template-columns: 4.5rem minmax(0, 1fr) 7.5rem;
    align-items: center;
    gap: 1.5rem;
  }

  .flow-item__step {
    padding-top: 0;
  }

  .flow-item__time {
    grid-column: auto;
    justify-self: end;
    padding-top: 0;
  }
}

@media (min-width: 900px) {
  .checklist-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

  .channel-card--phone {
    margin-top: 2.25rem;
  }

  .channel-card--address {
    margin-top: -0.5rem;
  }

  .partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 960px) {
  .contact-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }
}

@media (min-width: 1040px) {
  .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .topic-card:nth-child(4) {
    grid-column: span 1;
  }

  .topic-card:nth-child(5) {
    grid-column: span 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .topic-card,
  .topic-card__go {
    transition: none;
  }

  .topic-card:hover,
  .topic-card:focus-visible {
    transform: none;
  }

  .topic-card:hover .topic-card__go,
  .topic-card:focus-visible .topic-card__go {
    transform: none;
  }
}
<<<END>>>