.page-contact {
  --fb-line: rgba(30, 91, 255, 0.34);
  --fb-line-soft: rgba(30, 91, 255, 0.2);
  --fb-panel: rgba(12, 20, 36, 0.78);
  --fb-panel-2: rgba(18, 41, 74, 0.46);
  color: var(--fog);
  font-family: var(--font-body);
  padding-block: clamp(8px, 2vw, 20px) clamp(48px, 8vw, 96px);
}

.page-contact h2 {
  margin: 10px 0 14px;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .fb-shot {
  display: block;
  margin: 0;
  border: 1px solid var(--fb-line);
  background: var(--navy);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-contact .fb-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 首屏 ---------- */
.page-contact .fb-hero {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding-block: clamp(16px, 3vw, 30px) clamp(26px, 4vw, 48px);
}

.page-contact .fb-hero > * {
  min-width: 0;
}

.page-contact .fb-hero h1 {
  margin: 14px 0 18px;
  max-width: 15em;
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .fb-mark {
  position: relative;
  display: inline-block;
  color: var(--cyan);
}

.page-contact .fb-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.12em;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-contact .fb-hero__intro {
  margin: 0;
  max-width: 44em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--fog);
}

.page-contact .fb-channels {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .fb-channel {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--fb-line);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(158deg, var(--fb-panel-2), rgba(7, 10, 18, 0.9));
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-contact .fb-channel--tel {
  border-left-color: var(--orange);
}

.page-contact .fb-channel__val {
  margin: 12px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 16px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .fb-channel--tel .fb-channel__val {
  color: var(--orange);
}

.page-contact .fb-channel__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 问题类型选择 ---------- */
.page-contact .fb-picker {
  position: relative;
  margin-block: clamp(24px, 4vw, 44px);
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--fb-line);
  background: linear-gradient(180deg, var(--fb-panel-2), rgba(7, 10, 18, 0.86));
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-contact .fb-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .fb-picker__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.page-contact .fb-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--fb-line-soft);
  background: rgba(7, 10, 18, 0.66);
  color: var(--fog);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease),
    color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-contact .fb-tab .num {
  font-size: 12px;
  opacity: 0.72;
  letter-spacing: 0.04em;
}

.page-contact .fb-tab:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-contact #fb-type-login:checked ~ .fb-picker__tabs label[for="fb-type-login"],
.page-contact #fb-type-data:checked ~ .fb-picker__tabs label[for="fb-type-data"],
.page-contact #fb-type-nav:checked ~ .fb-picker__tabs label[for="fb-type-nav"],
.page-contact #fb-type-coop:checked ~ .fb-picker__tabs label[for="fb-type-coop"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-contact #fb-type-login:focus-visible ~ .fb-picker__tabs label[for="fb-type-login"],
.page-contact #fb-type-data:focus-visible ~ .fb-picker__tabs label[for="fb-type-data"],
.page-contact #fb-type-nav:focus-visible ~ .fb-picker__tabs label[for="fb-type-nav"],
.page-contact #fb-type-coop:focus-visible ~ .fb-picker__tabs label[for="fb-type-coop"] {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .fb-hint {
  display: none;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--cyan);
}

.page-contact .fb-hint--data {
  border-left-color: var(--orange);
}

.page-contact .fb-hint--nav {
  border-left-color: var(--blue);
}

.page-contact .fb-hint--coop {
  border-left-color: var(--magenta);
}

.page-contact #fb-type-login:checked ~ .fb-hints .fb-hint--login,
.page-contact #fb-type-data:checked ~ .fb-hints .fb-hint--data,
.page-contact #fb-type-nav:checked ~ .fb-hints .fb-hint--nav,
.page-contact #fb-type-coop:checked ~ .fb-hints .fb-hint--coop {
  display: block;
}

.page-contact .fb-hint h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .fb-hint p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--fog);
}

.page-contact .fb-hint ul {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

.page-contact .fb-hint li + li {
  margin-top: 4px;
}

/* ---------- 问题描述 ---------- */
.page-contact .fb-brief {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(26px, 4vw, 52px);
  border-top: 1px solid var(--fb-line-soft);
}

.page-contact .fb-brief > * {
  min-width: 0;
}

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

.page-contact .fb-steps li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 16px;
  border: 1px solid var(--fb-line-soft);
  background: var(--fb-panel);
}

.page-contact .fb-steps li:hover {
  border-color: var(--cyan);
}

.page-contact .fb-steps__n {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .fb-steps__b {
  min-width: 0;
}

.page-contact .fb-steps__b h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .fb-steps__b p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 服务时间 ---------- */
.page-contact .fb-sla {
  padding-block: clamp(26px, 4vw, 48px);
  border-top: 1px solid var(--fb-line-soft);
}

.page-contact .fb-sla__bar {
  display: grid;
  gap: 1px;
  margin-top: 18px;
  border: 1px solid var(--fb-line);
  background: var(--fb-line);
}

.page-contact .fb-sla__cell {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: var(--navy);
}

.page-contact .fb-sla__k {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-contact .fb-sla__v {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.1vw, 19px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--cyan);
}

.page-contact .fb-sla__cell:nth-child(2) .fb-sla__v {
  color: var(--orange);
}

.page-contact .fb-sla__cell:nth-child(3) .fb-sla__v {
  color: var(--paper);
}

.page-contact .fb-sla__note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.76;
  color: var(--slate);
}

/* ---------- 合作与纠错 ---------- */
.page-contact .fb-extra {
  padding-block: clamp(26px, 4vw, 48px);
  border-top: 1px solid var(--fb-line-soft);
}

.page-contact .fb-extra__grid {
  display: grid;
  gap: 16px;
  margin-top: 6px;
}

.page-contact .fb-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--fb-line-soft);
  background: linear-gradient(165deg, rgba(18, 41, 74, 0.4), rgba(7, 10, 18, 0.86));
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-contact .fb-card--coop {
  border-top: 2px solid var(--orange);
}

.page-contact .fb-card--fix {
  border-top: 2px solid var(--magenta);
}

.page-contact .fb-card h3 {
  margin: 12px 0 10px;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.28;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .fb-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .fb-card__note {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--fb-line-soft);
  font-size: 13.5px;
  color: var(--fog);
}

.page-contact .fb-card__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .fb-card__note a:hover {
  color: var(--orange);
}

/* ---------- 地址 ---------- */
.page-contact .fb-address {
  display: grid;
  gap: 18px;
  padding-block: clamp(26px, 4vw, 52px);
  border-top: 1px solid var(--fb-line-soft);
}

.page-contact .fb-address > * {
  min-width: 0;
}

.page-contact .fb-address__card {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--fb-line);
  border-left: 4px solid var(--orange);
  background: var(--fb-panel);
}

.page-contact .fb-address__line {
  margin: 16px 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.62;
  letter-spacing: 0.02em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .fb-address__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--slate);
}

.page-contact .fb-address__side {
  padding: clamp(18px, 3vw, 24px);
  border: 1px dashed var(--fb-line);
  background: rgba(12, 20, 36, 0.5);
}

.page-contact .fb-address__side h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .fb-address__side p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--slate);
}

.page-contact .fb-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 14px;
}

.page-contact .fb-address__fine {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .fb-address__fine a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .fb-address__fine a:hover {
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .fb-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-contact .fb-sla__bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .fb-hero {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-contact .fb-brief {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: start;
  }

  .page-contact .fb-brief__media {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 820px) {
  .page-contact .fb-extra__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .fb-address {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

@media (max-width: 480px) {
  .page-contact .fb-steps li {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-contact .fb-steps__n {
    font-size: 16px;
  }

  .page-contact .fb-tab {
    padding: 8px 12px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-tab,
  .page-contact .fb-steps li {
    transition: none;
  }

  .page-contact .fb-tab:hover {
    transform: none;
  }
}