/* ===== 品牌概况 /profile/ ===== */
.page-about {
  --pa-sec: clamp(44px, 7vw, 96px);
  --pa-gap: clamp(20px, 3.4vw, 44px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 5.5vw, 72px);
  background:
    radial-gradient(110% 82% at 92% -6%, rgba(255, 90, 43, 0.18), transparent 56%),
    radial-gradient(88% 76% at 2% 26%, rgba(31, 243, 214, 0.13), transparent 60%),
    var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(44, 53, 104, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 53, 104, 0.34) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 76%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  max-width: 16ch;
  font-size: clamp(32px, 6.2vw, 76px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--fog-soft);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-hero__fact {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 16px 16px 18px;
  background: var(--ink-700);
  border-top: 2px solid rgba(31, 243, 214, 0.5);
}

.page-about .about-hero__fact:nth-child(2) {
  border-top-color: rgba(255, 90, 43, 0.55);
}

.page-about .about-hero__fact:nth-child(4) {
  border-top-color: rgba(201, 162, 74, 0.6);
}

.page-about .about-hero__fact-num {
  display: block;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1;
  font-weight: 700;
}

.page-about .about-hero__fact-label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding: var(--pa-sec) 0;
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-sec__index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(201, 162, 74, 0.72);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(23px, 3.1vw, 34px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--fog-soft);
}

@media (min-width: 900px) {
  .page-about .about-sec__inner {
    grid-template-columns: 84px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
  }

  .page-about .about-sec__index {
    position: sticky;
    top: 128px;
  }
}

/* ---------- 通用小标题 / 图片 ---------- */
.page-about .about-what__sub {
  margin: 26px 0 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-about .about-what__sub:first-child {
  margin-top: 0;
}

.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure .media-frame__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 01 我们做什么 ---------- */
.page-about .about-what__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pa-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .about-what__cols .prose p {
  margin: 0 0 1.1em;
  color: var(--fog-soft);
}

.page-about .about-what__cols .prose p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-what__aside {
  margin-top: 0;
}

@media (min-width: 980px) {
  .page-about .about-what__cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-what__aside {
    margin-top: clamp(12px, 3vw, 46px);
  }
}

.page-about .fold {
  margin-top: 22px;
}

/* ---------- 02 分类与编号 ---------- */
.page-about .about-class__figure {
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .about-filter {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .class-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .class-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 26px;
  background: var(--ink-700);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .class-card:hover {
  background: #1d2652;
  box-shadow: inset 0 0 0 1px rgba(31, 243, 214, 0.55);
}

.page-about .class-card__name {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-tids {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .class-card__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

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

@media (min-width: 1100px) {
  .page-about .class-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 03 积分比率与返水 ---------- */
.page-about .about-ratio__note {
  margin-top: 12px;
}

.page-about .tier-list {
  display: grid;
  gap: 16px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tier {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .tier__key {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .tier__track {
  display: block;
  height: 10px;
  background: rgba(44, 53, 104, 0.85);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .tier__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--flame));
}

.page-about .tier__scale {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .tier {
    grid-template-columns: 110px minmax(0, 1fr) 190px;
    align-items: center;
    gap: 18px;
  }
}

.page-about .ratio-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ratio-cell {
  display: grid;
  gap: 9px;
  align-content: start;
  padding: 16px 16px 20px;
  background: var(--ink-700);
}

.page-about .ratio-cell__key {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .ratio-cell__body {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--fog-soft);
}

@media (min-width: 620px) {
  .page-about .ratio-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .ratio-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.page-about .about-ratio__steps {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 68ch;
  padding: 16px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fog-soft);
  background: var(--ink-700);
  border-left: 3px solid var(--flame);
}

/* ---------- 04 结算周期 ---------- */
.page-about .about-settle__tabs {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-settle__panels {
  margin-top: 16px;
}

.page-about .spec {
  display: grid;
  margin: 0;
  background: var(--ink-700);
  border: 1px solid var(--line);
}

.page-about .spec__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .spec__row:last-child {
  border-bottom: 0;
}

.page-about .spec__key {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--gold);
}

.page-about .spec__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fog-soft);
}

@media (min-width: 720px) {
  .page-about .spec__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
    padding: 16px 20px;
  }
}

/* ---------- 05 更新节奏与服务 ---------- */
.page-about .runtime-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pa-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px;
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--ink-800);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .timeline__when {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .timeline__what {
  margin: 7px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog-soft);
}

.page-about .reach {
  display: grid;
  gap: 14px;
}

.page-about .reach__item {
  padding: 18px 18px 20px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
}

.page-about .reach__title {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .reach__text {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-about .reach .about-figure {
  margin-top: 4px;
}

@media (min-width: 980px) {
  .page-about .runtime-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  background:
    linear-gradient(118deg, rgba(31, 243, 214, 0.09), rgba(255, 90, 43, 0.11)),
    var(--ink-700);
  border: 1px solid var(--line);
  border-top: 2px solid var(--flame);
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--fog);
}

.page-about .about-cta .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 480px) {
  .page-about .about-cta .btn-row .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}