/* ============================================================
   page-contact — 联系与反馈
   非对称双栏：左窄栏放渠道与归档机制，右宽栏放写法与模板
   ============================================================ */

.page-contact {
  --c-gap-lg: 3.6rem;
  --c-rail-surface: rgba(42, 26, 71, 0.62);
  --c-tpl-surface: rgba(42, 26, 71, 0.07);
  background:
    radial-gradient(1080px 520px at 94% -10%, rgba(217, 169, 74, 0.11), transparent 62%),
    radial-gradient(860px 460px at -8% 32%, rgba(47, 184, 198, 0.07), transparent 60%),
    var(--c-bg);
  color: var(--c-paper);
}

/* ---------- 面包屑 ---------- */
.page-contact .c-crumb {
  padding-top: 30px;
  padding-bottom: 4px;
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-meta);
  color: var(--c-muted);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--c-line);
}

.page-contact .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 220ms ease, border-color 220ms ease;
}

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

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--c-paper);
}

/* ---------- 页首 ---------- */
.page-contact .c-hero {
  position: relative;
  padding: 34px 0 58px;
  overflow: hidden;
}

.page-contact .c-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(520px, 74vw);
  height: 300px;
  border-radius: 62px;
  background: linear-gradient(118deg, rgba(217, 169, 74, 0.18), rgba(232, 85, 138, 0.06) 54%, transparent 78%);
  transform: rotate(var(--angle));
  pointer-events: none;
  z-index: 0;
}

.page-contact .c-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.2rem;
}

.page-contact .c-hero__title {
  margin: 0.45rem 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--c-paper);
}

.page-contact .c-hero__title::after {
  content: "";
  display: block;
  width: 86px;
  height: 3px;
  margin-top: 1.05rem;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-rose));
}

.page-contact .c-hero__lede {
  margin: 1.15rem 0 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .c-hero__facts {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-contact .c-hero__facts li {
  border-top: 1px solid var(--c-line);
  padding-top: 0.7rem;
}

.page-contact .c-hero__facts b {
  display: block;
  font-family: var(--mono);
  font-size: 21px;
  letter-spacing: 0.02em;
  color: var(--c-gold-hi);
  margin-bottom: 0.28rem;
}

.page-contact .c-hero__facts span {
  font-size: var(--fs-meta);
  color: var(--c-muted);
  line-height: 1.6;
}

.page-contact .c-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-line);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: linear-gradient(150deg, rgba(78, 62, 112, 0.55), rgba(11, 6, 20, 0.9));
}

.page-contact .c-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 主体双栏 ---------- */
.page-contact .c-desk {
  padding-bottom: 26px;
}

.page-contact .c-desk__grid {
  display: grid;
  gap: 2.6rem;
}

/* 左：粘性索引栏 */
.page-contact .c-rail {
  position: relative;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.4rem 1.8rem;
  background: linear-gradient(168deg, var(--c-rail-surface), rgba(21, 11, 38, 0.92));
  box-shadow: var(--shadow-card);
}

.page-contact .c-rail::after {
  content: "";
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border-top: 2px solid var(--c-gold);
  border-right: 2px solid var(--c-gold);
  border-radius: 0 9px 0 0;
  opacity: 0.62;
  pointer-events: none;
}

.page-contact .c-rail__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--c-paper);
}

.page-contact .c-rail__note {
  margin: 0.8rem 0 0;
  font-size: var(--fs-meta);
  line-height: 1.75;
  color: var(--c-muted);
}

.page-contact .c-kv {
  margin-top: 1.4rem;
  display: grid;
  gap: 1.15rem;
  border-top: 1px solid var(--c-line);
  padding-top: 1.3rem;
}

.page-contact .c-kv__k {
  margin: 0;
  font-size: var(--fs-cap);
  letter-spacing: 0.16em;
  color: var(--c-muted);
}

.page-contact .c-kv__v {
  margin: 0.4rem 0 0;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.72;
  letter-spacing: 0.02em;
  color: var(--c-paper);
  word-break: break-word;
}

.page-contact .c-kv__v--mail {
  font-size: clamp(15px, 3.6vw, 17px);
  letter-spacing: 0.055em;
  color: var(--c-gold-hi);
  word-break: break-all;
}

.page-contact .c-kv__v--sans {
  font-family: var(--sans);
  font-size: 15px;
  letter-spacing: 0;
}

.page-contact .c-rail__block {
  margin-top: 1.6rem;
  border-top: 1px solid var(--c-line);
  padding-top: 1.3rem;
}

.page-contact .c-rail__sub {
  margin: 0 0 0.7rem;
  font-size: var(--fs-meta);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-teal);
}

.page-contact .c-rail__list {
  margin: 0;
  padding-left: 1.05rem;
  display: grid;
  gap: 0.6rem;
  font-size: var(--fs-meta);
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact .c-rail__list li::marker {
  color: var(--c-gold);
}

.page-contact .c-rail__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: cstep;
  display: grid;
  gap: 0.55rem;
}

.page-contact .c-rail__steps li {
  counter-increment: cstep;
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 0.6rem;
  align-items: baseline;
  font-size: var(--fs-meta);
  line-height: 1.7;
  color: var(--c-paper);
}

.page-contact .c-rail__steps li::before {
  content: counter(cstep, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--c-gold);
  letter-spacing: 0.04em;
}

/* 右：内容流 */
.page-contact .c-flow {
  display: grid;
  gap: 2.4rem;
  min-width: 0;
}

.page-contact .c-letter__eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: var(--fs-cap);
  letter-spacing: 0.2em;
  color: var(--c-rose);
}

.page-contact .c-letter__title {
  margin: 0.5rem 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.24;
  color: var(--c-paper);
}

.page-contact .c-letter__lede {
  margin: 1rem 0 0;
  max-width: 66ch;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .c-rules {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-contact .c-rules li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0.95rem;
  padding: 1.05rem 1.05rem 1.1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  background: rgba(11, 6, 20, 0.42);
}

.page-contact .c-rules__idx {
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--c-gold);
  letter-spacing: 0.02em;
}

.page-contact .c-rules__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-contact .c-rules__body p {
  margin: 0.42rem 0 0;
  font-size: var(--fs-meta);
  line-height: 1.78;
  color: var(--c-muted);
}

.page-contact .c-letter__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: linear-gradient(140deg, rgba(47, 184, 198, 0.14), rgba(11, 6, 20, 0.92));
}

.page-contact .c-letter__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 模板卡 */
.page-contact .c-tpl {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.35rem 1.6rem;
  background: var(--c-paper-2);
  color: var(--c-ink);
  border: 1px solid rgba(42, 26, 71, 0.2);
  box-shadow: 0 30px 66px -38px rgba(0, 0, 0, 0.95);
}

.page-contact .c-tpl::after {
  content: "";
  position: absolute;
  bottom: 14px;
  left: 14px;
  width: 30px;
  height: 30px;
  border-bottom: 2px solid rgba(42, 26, 71, 0.42);
  border-left: 2px solid rgba(42, 26, 71, 0.42);
  border-radius: 0 0 0 9px;
  pointer-events: none;
}

.page-contact .c-tpl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  justify-content: space-between;
}

.page-contact .c-tpl__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .c-tpl__body {
  margin: 1.15rem 0 0;
  padding: 1.05rem 1rem;
  border-radius: var(--radius-md);
  background: var(--c-tpl-surface);
  border: 1px dashed rgba(42, 26, 71, 0.32);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.9;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* 折叠面板（模板卡内，浅色底） */
.page-contact .c-fold {
  margin-top: 1.15rem;
  border-top: 1px solid rgba(42, 26, 71, 0.2);
  padding-top: 0.95rem;
}

.page-contact .c-fold__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.72rem 0.95rem;
  border: 1px solid rgba(42, 26, 71, 0.34);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--c-ink);
  font-family: var(--sans);
  font-size: var(--fs-meta);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: border-color 220ms ease, background-color 220ms ease, color 220ms ease;
}

.page-contact .c-fold__trigger:hover {
  border-color: var(--c-ink);
  background: rgba(42, 26, 71, 0.07);
}

.page-contact .c-fold__trigger:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

.page-contact .c-fold__caret {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 260ms ease;
}

.page-contact .c-fold__trigger[aria-expanded="true"] .c-fold__caret {
  transform: rotate(225deg) translate(-1px, -1px);
}

.page-contact .c-fold__panel {
  margin-top: 1rem;
  animation: c-fold-in 260ms ease both;
}

@keyframes c-fold-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-contact .c-fields {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.page-contact .c-fields__row {
  display: grid;
  gap: 0.28rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(42, 26, 71, 0.16);
}

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

.page-contact .c-fields dt {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: rgba(42, 26, 71, 0.78);
}

.page-contact .c-fields dd {
  margin: 0;
  font-size: var(--fs-meta);
  line-height: 1.75;
  color: var(--c-ink);
}

/* ---------- 月份归档示意带 ---------- */
.page-contact .c-band {
  padding: 56px 0 58px;
}

.page-contact .c-band__head {
  margin-bottom: 1.9rem;
}

.page-contact .c-band__scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--c-line);
  scrollbar-width: thin;
}

.page-contact .c-band__svg {
  display: block;
  width: 100%;
  min-width: 760px;
  height: auto;
}

.page-contact .c-band__bar {
  fill: var(--c-gold);
}

.page-contact .c-band__bar--last {
  fill: var(--c-teal);
}

.page-contact .c-band__tick {
  fill: var(--c-muted);
  font-family: var(--mono);
  font-size: 15px;
  text-anchor: middle;
  letter-spacing: 0.02em;
}

.page-contact .c-steps {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: cflow;
}

.page-contact .c-steps li {
  position: relative;
  counter-increment: cflow;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.2rem 1.2rem;
  background: var(--c-rail-surface);
}

.page-contact .c-steps li::before {
  content: counter(cflow, decimal-leading-zero);
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin-bottom: 0.5rem;
}

.page-contact .c-steps b {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-contact .c-steps span {
  display: block;
  margin-top: 0.42rem;
  font-size: var(--fs-meta);
  line-height: 1.72;
  color: var(--c-muted);
}

/* ---------- 常见提交类型 ---------- */
.page-contact .c-types {
  padding: 56px 0 20px;
}

.page-contact .c-types__list {
  margin-top: 1.8rem;
  display: grid;
  gap: 0.85rem;
}

.page-contact .c-types__item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  background: rgba(11, 6, 20, 0.46);
  overflow: hidden;
  transition: border-color 220ms ease, background-color 220ms ease;
}

.page-contact .c-types__item:hover {
  border-color: rgba(217, 169, 74, 0.55);
}

.page-contact .c-types__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-contact .c-types__trigger {
  display: flex;
  width: 100%;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1rem;
  padding: 1.05rem 1.15rem;
  border: 0;
  background: transparent;
  color: var(--c-paper);
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color 220ms ease, background-color 220ms ease;
}

.page-contact .c-types__trigger:hover {
  background: rgba(42, 26, 71, 0.42);
}

.page-contact .c-types__trigger:focus-visible {
  outline: 2px solid var(--c-gold-hi);
  outline-offset: -3px;
}

.page-contact .c-types__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-contact .c-types__prefix {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--c-teal);
  border: 1px solid rgba(47, 184, 198, 0.45);
  border-radius: var(--radius-pill);
  padding: 0.24rem 0.72rem;
  white-space: nowrap;
}

.page-contact .c-types__trigger[aria-expanded="true"] .c-types__prefix {
  border-color: var(--c-gold);
  color: var(--c-gold-hi);
}

.page-contact .c-types__panel {
  padding: 0 1.15rem 1.25rem;
  animation: c-fold-in 260ms ease both;
}

.page-contact .c-types__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: var(--fs-meta);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .c-types__need {
  margin: 0.85rem 0 0;
  padding-left: 1.05rem;
  display: grid;
  gap: 0.5rem;
  font-size: var(--fs-meta);
  line-height: 1.75;
  color: var(--c-paper);
}

.page-contact .c-types__need li::marker {
  color: var(--c-rose);
}

.page-contact .c-types__link {
  margin-top: 0.9rem !important;
}

.page-contact .c-types__link a {
  color: var(--c-gold-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(243, 218, 154, 0.42);
  transition: border-color 220ms ease;
}

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

/* ---------- 提交内容处理 ---------- */
.page-contact .c-handle {
  padding: 46px 0 74px;
}

.page-contact .c-handle__inner {
  display: grid;
  gap: 2.2rem;
  border-top: 1px solid var(--c-line);
  padding-top: 2.4rem;
}

.page-contact .c-handle__title {
  margin: 0 0 1rem;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.26;
  color: var(--c-paper);
}

.page-contact .c-handle__copy p {
  margin: 0 0 1.1rem;
  max-width: 66ch;
  font-size: var(--fs-body);
  line-height: 1.82;
  color: var(--c-muted);
}

.page-contact .c-handle__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem !important;
}

.page-contact .c-handle__notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-contact .c-handle__notes li {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.05rem;
  background: rgba(42, 26, 71, 0.4);
}

.page-contact .c-handle__notes b {
  display: block;
  font-size: var(--fs-meta);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  margin-bottom: 0.32rem;
}

.page-contact .c-handle__notes span {
  display: block;
  font-size: var(--fs-meta);
  line-height: 1.7;
  color: var(--c-paper);
}

/* ============================================================
   响应式
   ============================================================ */

@media (min-width: 560px) {
  .page-contact .c-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .c-hero__facts li {
    padding-top: 0.85rem;
  }
}

@media (min-width: 760px) {
  .page-contact .c-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.3rem;
  }

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

  .page-contact .c-tpl {
    padding: 1.85rem 1.8rem 2rem;
  }

  .page-contact .c-tpl__body {
    padding: 1.25rem 1.3rem;
    font-size: 14px;
  }
}

@media (min-width: 900px) {
  .page-contact .c-hero {
    padding: 52px 0 74px;
  }

  .page-contact .c-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 3.4rem;
  }

  .page-contact .c-hero__media {
    transform: translateY(16px);
  }
}

@media (min-width: 980px) {
  .page-contact .c-desk__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr);
    gap: var(--c-gap-lg);
    align-items: start;
  }

  .page-contact .c-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-contact .c-handle__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 3.2rem;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-contact .c-band__svg {
    min-width: 0;
  }

  .page-contact .c-rail {
    padding: 1.9rem 1.7rem 2.1rem;
  }
}

/* 减弱动效 */
@media (prefers-reduced-motion: reduce) {
  .page-contact .c-fold__panel,
  .page-contact .c-types__panel {
    animation: none;
  }

  .page-contact .c-fold__caret,
  .page-contact .breadcrumb a,
  .page-contact .c-types__item,
  .page-contact .c-types__trigger {
    transition: none;
  }

  .page-contact .c-hero__media {
    transform: none;
  }
}
</main>