/* ===== page-contact · 合作与联系 ===== */
.page-contact {
  --cc-dash: rgba(110, 138, 120, 0.42);
  --cc-dash-soft: rgba(110, 138, 120, 0.22);
  --cc-paper-soft: rgba(243, 239, 228, 0.76);
  --cc-paper-dim: rgba(243, 239, 228, 0.62);
  position: relative;
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  font-family: var(--bs-font-display);
  font-weight: 900;
  letter-spacing: -0.015em;
}

.page-contact a {
  color: var(--bs-lime);
  text-decoration: none;
  border-bottom: 1px dashed var(--bs-lime-hair);
}

.page-contact a:hover,
.page-contact a:focus-visible {
  border-bottom-color: var(--bs-lime);
}

.page-contact .bs-eyebrow {
  display: block;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
}

/* ---------- 首屏 ---------- */
.contact-lede {
  padding: clamp(56px, 10vw, 128px) 0 clamp(28px, 5vw, 56px);
  background:
    radial-gradient(120% 80% at 12% 0%, rgba(18, 51, 38, 0.85) 0%, transparent 62%),
    linear-gradient(180deg, rgba(12, 20, 19, 1) 60%, rgba(12, 20, 19, 0.98) 100%);
}

.contact-lede .bs-breadcrumb {
  margin-bottom: clamp(36px, 6vw, 64px);
}

.contact-lede__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px 40px;
  align-items: end;
}

@media (min-width: 900px) {
  .contact-lede__grid {
    grid-template-columns: minmax(0, 1fr) minmax(120px, auto);
  }
}

.contact-lede__text h1 {
  font-size: clamp(40px, 8.4vw, 104px);
  line-height: 0.98;
  margin: 0 0 clamp(20px, 3vw, 32px);
  color: var(--bs-paper);
}

.contact-lede__lead {
  max-width: 52ch;
  margin: 0;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--cc-paper-soft);
}

.contact-lede__annot {
  display: none;
}

@media (min-width: 900px) {
  .contact-lede__annot {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    padding-bottom: 6px;
  }
}

.contact-lede__annot .bs-annotation--vertical {
  writing-mode: vertical-rl;
  color: var(--bs-lime);
  letter-spacing: 0.22em;
  font-size: 12px;
  opacity: 0.78;
}

.contact-lede__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--bs-hair);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--bs-moss);
}

.contact-lede__meta .bs-data {
  color: var(--bs-amber);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.contact-lede__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--bs-moss);
}

/* ---------- 双栏主体 ---------- */
.contact-split {
  padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
}

.contact-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(40px, 6vw, 72px);
}

@media (min-width: 960px) {
  .contact-split__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 1fr);
    gap: clamp(48px, 5vw, 84px);
  }
}

.contact-split__left h2 {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--bs-paper);
}

.contact-split__intro {
  max-width: 60ch;
  margin: 0 0 clamp(24px, 3vw, 34px);
  font-size: 15px;
  line-height: 1.8;
  color: var(--cc-paper-soft);
}

.contact-split__eyebrow {
  margin-top: clamp(48px, 6vw, 76px);
}

/* 受理范围两栏 */
.scope-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 640px) {
  .scope-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.scope-column {
  padding: 22px 20px 24px;
  border-radius: var(--bs-radius-md);
  border: 1px solid var(--bs-hair);
  background: rgba(12, 20, 19, 0.5);
}

.scope-column--in {
  border-color: var(--bs-lime-hair);
  background: linear-gradient(180deg, rgba(182, 255, 55, 0.07), rgba(182, 255, 55, 0.015));
}

.scope-column--out {
  border-color: rgba(228, 87, 61, 0.28);
  background: linear-gradient(180deg, rgba(228, 87, 61, 0.07), rgba(228, 87, 61, 0.015));
}

.scope-column h3 {
  font-size: 14px;
  letter-spacing: 0.1em;
  margin: 0 0 14px;
}

.scope-column--in h3 {
  color: var(--bs-lime);
}

.scope-column--out h3 {
  color: var(--bs-red);
}

.scope-column ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.scope-column li {
  position: relative;
  padding: 12px 0 12px 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--cc-paper-soft);
  border-top: 1px dashed var(--cc-dash-soft);
}

.scope-column li:first-child {
  border-top: none;
  padding-top: 0;
}

.scope-column li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--bs-moss);
}

.scope-column li:first-child::before {
  top: 7px;
}

.scope-column--in li::before {
  background: var(--bs-lime);
}

.scope-column--out li::before {
  background: var(--bs-red);
}

/* 协作条目 */
.coop-list {
  margin-top: 8px;
  border-top: 1px solid var(--bs-hair);
}

.coop-item {
  border-bottom: 1px solid var(--bs-hair);
}

.coop-item__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--bs-font-display);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 900;
  letter-spacing: -0.005em;
  color: var(--bs-paper);
  transition: color var(--bs-dur) var(--bs-ease);
}

.coop-item__head::-webkit-details-marker {
  display: none;
}

.coop-item__head:hover,
.coop-item__head:focus-visible {
  color: var(--bs-lime);
  outline: none;
}

.coop-item__num {
  flex-shrink: 0;
  min-width: 28px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bs-amber);
}

.coop-item__title {
  flex: 1;
  min-width: 0;
}

.coop-item__chev {
  flex-shrink: 0;
  font-size: 18px;
  line-height: 1;
  color: var(--bs-moss);
  transition: transform var(--bs-dur) var(--bs-ease), color var(--bs-dur) var(--bs-ease);
}

.coop-item[open] .coop-item__chev {
  transform: rotate(45deg);
  color: var(--bs-lime);
}

.coop-item__body {
  padding: 0 0 26px 42px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--cc-paper-dim);
}

.coop-item__body p {
  margin: 0 0 12px;
}

.coop-item__body p:last-child {
  margin-bottom: 0;
}

/* 右栏 */
.contact-split__right {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.contact-media-paper {
  margin: 0;
  border-radius: var(--bs-radius-md);
  overflow: hidden;
  border: 1px solid var(--bs-hair);
  background: rgba(18, 51, 38, 0.4);
}

.contact-media-paper .bs-media__inner {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.contact-media-paper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contact-media-paper .bs-media__caption {
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bs-moss);
  background: rgba(12, 20, 19, 0.6);
  border-top: 1px solid var(--bs-hair-soft);
}

.contact-card {
  position: relative;
  padding: clamp(24px, 3.2vw, 34px);
  border-radius: var(--bs-radius-lg);
  border: 1px solid var(--bs-hair);
  background:
    linear-gradient(180deg, rgba(18, 51, 38, 0.92), rgba(18, 51, 38, 0.55));
  overflow: hidden;
}

.contact-card::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px dashed var(--cc-dash);
  border-radius: calc(var(--bs-radius-lg) - 14px);
  pointer-events: none;
}

.contact-card h2 {
  position: relative;
  margin: 0 0 14px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.2;
  color: var(--bs-paper);
}

.contact-card__note {
  position: relative;
  margin: 0 0 22px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--cc-paper-dim);
}

.contact-card__list {
  position: relative;
  margin: 0;
  padding: 0;
}

.contact-card__row {
  padding: 16px 0;
  border-top: 1px dashed var(--cc-dash);
}

.contact-card__row:first-child {
  border-top: none;
  padding-top: 2px;
}

.contact-card__row dt {
  margin-bottom: 8px;
  font-family: var(--bs-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bs-amber);
}

.contact-card__row dd {
  margin: 0;
  font-size: clamp(14px, 1.3vw, 16px);
  line-height: 1.55;
  color: var(--bs-paper);
}

.contact-card__value {
  font-family: var(--bs-font-mono);
  letter-spacing: 0.02em;
  color: var(--bs-lime);
  word-break: break-all;
}

.contact-card__value--plain {
  font-family: var(--bs-font-body);
  color: var(--bs-paper);
  word-break: normal;
}

.contact-card__foot {
  position: relative;
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--cc-dash);
  color: var(--bs-moss);
}

/* ---------- 响应时点 ---------- */
.contact-response {
  padding: clamp(48px, 8vw, 100px) 0 clamp(40px, 6vw, 72px);
  background: linear-gradient(180deg, transparent, rgba(18, 51, 38, 0.42) 40%, transparent);
}

.contact-response__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  margin-bottom: clamp(40px, 6vw, 72px);
}

@media (min-width: 880px) {
  .contact-response__grid {
    grid-template-columns: minmax(220px, 1fr) minmax(0, 1.55fr);
    gap: clamp(48px, 5vw, 88px);
    align-items: start;
  }
}

.contact-response__head h2 {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--bs-paper);
}

.contact-response__head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cc-paper-soft);
  max-width: 44ch;
}

.response-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.response-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px 24px;
  padding: 22px 24px;
  border-radius: var(--bs-radius-md);
  border: 1px solid var(--bs-hair);
  background: rgba(12, 20, 19, 0.62);
}

@media (min-width: 620px) {
  .response-item {
    grid-template-columns: minmax(140px, 180px) minmax(0, 1fr);
    align-items: center;
  }
}

.response-item__num {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.response-item__num .bs-data {
  font-size: clamp(34px, 3.6vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--bs-lime);
}

.response-item__unit {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--bs-moss);
}

.response-item__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cc-paper-dim);
}

.response-item__label {
  margin-bottom: 6px !important;
  font-family: var(--bs-font-mono);
  font-size: 11px !important;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bs-amber) !important;
}

/* 提交前清单 */
.submit-checklist {
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--bs-radius-lg);
  border: 1px solid var(--bs-hair);
  background: rgba(28, 43, 38, 0.72);
}

.submit-checklist__head {
  margin-bottom: 22px;
}

.submit-checklist__head h3 {
  margin: 0;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.3;
  color: var(--bs-paper);
}

.submit-checklist__head .bs-eyebrow {
  margin-bottom: 10px;
  color: var(--bs-amber);
}

.submit-checklist__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

@media (min-width: 700px) {
  .submit-checklist__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 20px;
  }
}

.submit-checklist__list label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: var(--bs-radius-sm);
  border: 1px solid var(--bs-hair-soft);
  background: rgba(12, 20, 19, 0.58);
  font-size: 14px;
  color: var(--cc-paper-soft);
  cursor: pointer;
  transition: border-color var(--bs-dur) var(--bs-ease), background var(--bs-dur) var(--bs-ease), color var(--bs-dur) var(--bs-ease);
}

.submit-checklist__list label:hover,
.submit-checklist__list label:focus-within {
  border-color: var(--bs-lime-hair);
  color: var(--bs-paper);
}

.submit-checklist__list input[type="checkbox"] {
  flex-shrink: 0;
  appearance: none;
  position: relative;
  width: 16px;
  height: 16px;
  margin: 0;
  border: 1px solid var(--bs-moss);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  transition: background var(--bs-dur) var(--bs-ease), border-color var(--bs-dur) var(--bs-ease);
}

.submit-checklist__list input[type="checkbox"]:checked {
  background: var(--bs-lime);
  border-color: var(--bs-lime);
}

.submit-checklist__list input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 4px;
  height: 8px;
  border: solid var(--bs-ink);
  border-width: 0 2px 2px 0;
  transform: translate(-50%, -60%) rotate(45deg);
}

.submit-checklist > .bs-annotation {
  color: var(--bs-moss);
  display: block;
}

/* ---------- 底部横条 ---------- */
.contact-strip {
  padding: clamp(48px, 8vw, 96px) 0 0;
  border-top: 1px solid var(--bs-hair);
  background: linear-gradient(180deg, rgba(18, 51, 38, 0.42), rgba(12, 20, 19, 0.9));
}

.contact-strip__head {
  max-width: 66ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.contact-strip__head h2 {
  font-size: clamp(26px, 4.2vw, 52px);
  line-height: 1.1;
  margin: 0 0 16px;
  color: var(--bs-paper);
}

.contact-strip__head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cc-paper-soft);
}

.contact-strip__figure {
  margin: 0 0 clamp(32px, 5vw, 52px);
  border-radius: var(--bs-radius-md);
  overflow: hidden;
  border: 1px solid var(--bs-hair);
  background: rgba(12, 20, 19, 0.6);
}

.contact-strip__figure .bs-media__inner {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.contact-strip__figure .bs-media__caption {
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bs-moss);
  border-top: 1px solid var(--bs-hair-soft);
  background: rgba(18, 51, 38, 0.5);
}

.contact-strip__links {
  padding-bottom: clamp(32px, 5vw, 56px);
}

.contact-strip__links .bs-eyebrow {
  color: var(--bs-amber);
}

.contact-strip__links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-strip__links-list .bs-btn {
  border-bottom: none;
}

@media (max-width: 480px) {
  .contact-lede__meta {
    gap: 10px;
  }

  .response-item {
    padding: 20px 18px;
  }

  .coop-item__body {
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>