/* ===== 品牌价值页 · page-about ===== */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(118deg, rgba(123, 77, 255, 0.18) 0%, rgba(123, 77, 255, 0) 48%),
    linear-gradient(202deg, rgba(255, 122, 47, 0.12) 0%, rgba(255, 122, 47, 0) 40%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 72px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
  margin-top: clamp(20px, 3.4vw, 40px);
}

.page-about .hero-main h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 5.6vw, 66px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.025em;
  max-width: 16em;
}

.page-about .hero-main h1 .hl {
  color: var(--c-signal);
}

.page-about .hero-main .lede {
  margin-top: 20px;
  max-width: 46em;
}

.page-about .hero-panel {
  border: 1px solid var(--line);
  border-left: 2px solid var(--c-violet);
  background: var(--c-hull);
  padding: 6px 18px 6px;
}

.page-about .hero-panel-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .hero-panel-row:last-child {
  border-bottom: 0;
}

.page-about .hero-panel-key {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-fog);
  white-space: nowrap;
}

.page-about .hero-panel-val {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-snow);
  text-align: right;
  min-width: 0;
}

/* ---- 左侧索引 + 右侧叙事 ---- */

.page-about .value-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .value-index {
  border: 1px solid var(--line);
  background: var(--c-hull);
  padding: 8px 8px 10px;
}

.page-about .value-index-title {
  margin: 0 0 8px;
  padding: 8px 10px 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-fog);
}

.page-about .value-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
}

.page-about .value-index-link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--c-fog);
  font-size: 13px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .value-index-link:hover,
.page-about .value-index-link:focus-visible {
  color: var(--c-snow);
  background: rgba(123, 77, 255, 0.18);
  border-left-color: var(--c-violet);
}

.page-about .value-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-signal);
}

/* ---- 支柱区块 ---- */

.page-about .value-body {
  display: grid;
  gap: clamp(12px, 2vw, 24px);
  min-width: 0;
}

.page-about .pillar {
  position: relative;
  padding: clamp(28px, 4.4vw, 56px) 0 clamp(24px, 3.6vw, 44px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 110px;
  min-width: 0;
}

.page-about .pillar::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 68px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-violet), var(--c-signal));
}

.page-about .pillar--accent {
  background:
    linear-gradient(158deg, rgba(123, 77, 255, 0.13) 0%, rgba(123, 77, 255, 0) 58%),
    linear-gradient(20deg, rgba(63, 208, 201, 0.06) 0%, rgba(63, 208, 201, 0) 42%);
}

.page-about .pillar--final {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.page-about .pillar-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .pillar-num {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--c-signal);
}

.page-about .pillar-num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 122, 47, 0.55), rgba(255, 122, 47, 0));
}

.page-about .pillar-title {
  margin: 0;
  font-size: clamp(22px, 2.9vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
  max-width: 22em;
}

.page-about .pillar-claim {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.7;
  color: var(--c-glacier);
  max-width: 34em;
}

.page-about .pillar-tail {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-about .value-body .prose {
  max-width: 44em;
}

.page-about .value-body .prose p {
  margin: 0 0 16px;
}

.page-about .value-body .prose p:last-child {
  margin-bottom: 0;
}

/* ---- 图片 ---- */

.page-about .pillar-media {
  margin: clamp(20px, 3vw, 32px) 0;
  border: 1px solid var(--line);
  background: var(--c-hull);
  position: relative;
  min-width: 0;
}

.page-about .pillar-media::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 46px;
  background: linear-gradient(180deg, var(--c-signal), rgba(255, 122, 47, 0));
}

.page-about .pillar-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.page-about .pillar-media figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-fog);
}

/* ---- 能力清单 ---- */

.page-about .ability-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0 0 clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line-soft);
}

.page-about .ability {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num text";
  gap: 4px 16px;
  padding: 18px 0 18px 14px;
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .ability:hover {
  border-left-color: var(--c-violet);
  background: rgba(123, 77, 255, 0.09);
  transform: translateX(4px);
}

.page-about .ability-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-violet);
  padding-top: 4px;
}

.page-about .ability-title {
  grid-area: title;
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--c-snow);
}

.page-about .ability p {
  grid-area: text;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-fog);
  max-width: 42em;
}

/* ---- 席位列表 ---- */

.page-about .seat-list {
  margin: clamp(20px, 3vw, 28px) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .seat-item {
  background: var(--c-void);
  padding: 16px 18px;
  display: grid;
  gap: 6px;
  transition: background-color 0.22s var(--ease);
}

.page-about .seat-item:hover {
  background: var(--c-hull);
}

.page-about .seat-item dt {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-signal);
  letter-spacing: 0.02em;
}

.page-about .seat-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-fog);
}

/* ---- 合作卡片 ---- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .partner-card {
  background: var(--c-hull);
  padding: 22px 20px 24px;
  border-top: 2px solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .partner-card:hover {
  border-top-color: var(--c-signal);
  background: var(--c-hull-2);
  transform: translateY(-4px);
}

.page-about .partner-tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-violet);
}

.page-about .partner-title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--c-snow);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-fog);
}

/* ---- 团队 ---- */

.page-about .team-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .team-list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .team-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-key {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-snow);
  letter-spacing: 0.02em;
}

.page-about .team-val {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-glacier);
  text-align: right;
}

.page-about .pillar-media--portrait {
  margin: 0;
}

/* ---- 下一步 ---- */

.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .next-block {
  background: var(--c-hull);
  padding: 24px 20px 26px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .next-title {
  margin: 0;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.4;
  font-weight: 800;
  color: var(--c-snow);
}

.page-about .next-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-fog);
  max-width: 34em;
}

.page-about .next-block .btn {
  justify-self: start;
  margin-top: 4px;
}

/* ===== 媒体查询 ===== */

@media (min-width: 640px) {
  .page-about .value-index-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .seat-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .ability {
    grid-template-columns: 72px minmax(0, 1fr);
    grid-template-areas:
      "num title"
      "num text";
    padding-left: 18px;
  }

  .page-about .seat-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
  }

  .page-about .value-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .value-index {
    position: sticky;
    top: 96px;
  }

  .page-about .value-index-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }

  .page-about .pillar-media--portrait {
    margin-top: 4px;
  }
}

@media (min-width: 1180px) {
  .page-about .value-layout {
    grid-template-columns: 244px minmax(0, 1fr);
  }

  .page-about .pillar-title {
    max-width: 20em;
  }
}