/* ================= 品牌愿景 / page-about ================= */

.page-about {
  --about-rule: rgba(28, 36, 56, .85);
  --about-hair: rgba(28, 36, 56, .62);
  --about-glow: rgba(232, 181, 75, .16);
  --about-cyan-glow: rgba(53, 230, 210, .13);
  position: relative;
  isolation: isolate;
  overflow-x: clip;
}

/* ---------- 通用排版 ---------- */

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.15rem);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--text);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.1vw, 1.25rem);
  line-height: 1.4;
  color: var(--text);
  margin: 0 0 8px;
}

.page-about p {
  color: var(--muted);
  line-height: 1.75;
  margin: 0 0 14px;
}

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

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(232, 181, 75, .15));
}

.page-about .lede {
  max-width: 58ch;
}

.page-about .panel-cap {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 14px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(24px, 5vw, 48px);
  padding-bottom: clamp(56px, 9vw, 112px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--about-rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-rule) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .42;
  -webkit-mask-image: radial-gradient(125% 92% at 16% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(125% 92% at 16% 0%, #000 0%, transparent 74%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -230px;
  right: -190px;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--about-glow), transparent 68%);
  pointer-events: none;
}

.page-about .crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(28px, 5vw, 52px);
  padding: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--blueprint);
}

.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .crumbs [aria-current="page"] {
  color: var(--gold);
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 64px);
  align-items: end;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--text);
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 16ch;
}

.page-about .about-hero h1 .hl {
  color: var(--gold);
  position: relative;
}

.page-about .about-hero h1 .hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .06em;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(53, 230, 210, .8));
  opacity: .65;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .hero-panel {
  position: relative;
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3.2vw, 32px);
  background: linear-gradient(158deg, rgba(13, 18, 32, .96), rgba(5, 7, 12, .92));
  box-shadow:
    inset 0 1px 0 rgba(232, 181, 75, .14),
    var(--shadow-float);
  overflow: hidden;
}

.page-about .hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(115% 78% at 100% 0%, var(--about-cyan-glow), transparent 70%);
  pointer-events: none;
}

.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .hero-facts li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .hf-num {
  flex: 0 0 auto;
  min-width: 5ch;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .02em;
}

.page-about .hf-label {
  color: var(--text);
  font-size: .95rem;
  line-height: 1.55;
}

.page-about .panel-foot {
  position: relative;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-hair);
  font-size: .86rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 01 起点 ---------- */

.page-about .why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 60px);
}

.page-about .why-lead p {
  max-width: 56ch;
}

.page-about .why-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .why-points li {
  padding: 18px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .why-points li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .wp-key {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
  background: rgba(53, 230, 210, .1);
  border: 1px solid rgba(53, 230, 210, .28);
}

.page-about .why-points p {
  font-size: .95rem;
  max-width: 46ch;
}

/* ---------- 02 历程与时间线 ---------- */

.page-about .tl-figure {
  margin: clamp(26px, 4vw, 44px) 0 clamp(34px, 5vw, 56px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink);
  box-shadow: inset 0 0 0 1px var(--about-hair);
}

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

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--cyan) 58%, rgba(53, 230, 210, 0));
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 clamp(30px, 4.5vw, 50px);
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 181, 75, .12);
  transition: box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-about .tl-node:hover::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 6px rgba(53, 230, 210, .14);
}

.page-about .tl-index {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .tl-node p {
  max-width: 62ch;
  font-size: .95rem;
}

/* ---------- 03 栏目体系 ---------- */

.page-about .col-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: var(--blueprint);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .col-cell {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink);
  transition: background .3s var(--ease);
}

.page-about .col-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(232, 181, 75, 0));
  opacity: .45;
  transition: opacity .3s var(--ease);
}

.page-about .col-cell:hover {
  background: var(--ink-2);
}

.page-about .col-cell:hover::before {
  opacity: 1;
}

.page-about .col-code {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-about .col-name {
  margin-bottom: 8px;
}

.page-about .col-desc {
  font-size: .93rem;
  margin-bottom: 14px;
}

.page-about .col-freq {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(53, 230, 210, .08);
  border: 1px solid rgba(53, 230, 210, .22);
  margin: 0;
}

.page-about .col-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px var(--about-hair);
}

.page-about .col-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.5vw, 36px);
}

/* ---------- 04 团队 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: center;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .team-figure {
  margin: 0;
  position: relative;
}

.page-about .team-figure img {
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px var(--about-hair);
}

.page-about .team-cap {
  display: block;
  margin-top: 14px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  text-align: center;
}

.page-about .team-list {
  display: grid;
  gap: 0;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 16px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .team-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text);
  font-size: 1rem;
}

.page-about .team-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold);
  text-align: right;
  white-space: nowrap;
}

.page-about .team-desc {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: .93rem;
  max-width: 60ch;
}

/* ---------- 05 内容做法 ---------- */

.page-about .rules {
  display: grid;
  gap: 0;
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-about .rule-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  padding: clamp(22px, 3vw, 32px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .rule-no {
  grid-row: 1 / span 2;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  padding-top: 4px;
}

.page-about .rule-row h3 {
  grid-column: 2;
  margin-bottom: 6px;
}

.page-about .rule-row p {
  grid-column: 2;
  font-size: .95rem;
  max-width: 66ch;
  margin: 0;
}

/* ---------- 06 往后 ---------- */

.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
}

.page-about .next-lead p {
  max-width: 58ch;
}

.page-about .next-aside {
  position: relative;
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3.2vw, 30px);
  background: linear-gradient(150deg, rgba(13, 18, 32, .95), rgba(5, 7, 12, .9));
  box-shadow: inset 0 1px 0 rgba(53, 230, 210, .16), var(--shadow-float);
}

.page-about .next-aside .panel-cap {
  color: var(--cyan);
}

.page-about .next-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .next-list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--about-hair);
  color: var(--text);
  font-size: .93rem;
  line-height: 1.6;
}

.page-about .next-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .next-list .mono {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .next-btn {
  width: 100%;
  justify-content: center;
}

/* ---------- 收尾胶囊 ---------- */

.page-about .outro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: clamp(40px, 6vw, 72px);
}

.page-about .outro-pill {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 16px 22px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  background: rgba(13, 18, 32, .78);
  border: 1px solid var(--about-hair);
  transition: border-color .25s var(--ease), transform .25s var(--ease), background .25s var(--ease);
}

.page-about .outro-pill:hover {
  border-color: rgba(232, 181, 75, .55);
  background: rgba(13, 18, 32, .98);
  transform: translateY(-2px);
}

.page-about .outro-key {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
  flex: 0 0 auto;
}

.page-about .outro-label {
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.5;
}

.page-about .outro-pill:hover .outro-label {
  color: var(--text);
}

/* ---------- 响应式 ---------- */

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

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

  .page-about .outro-pill {
    border-radius: var(--radius-md);
    align-items: flex-start;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .why-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .why-points {
    padding-left: clamp(20px, 3vw, 40px);
    border-left: 1px solid var(--about-hair);
  }

  .page-about .why-points li:first-child {
    padding-top: 0;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .next-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-about .tl-node {
    display: grid;
    grid-template-columns: 148px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 36px);
  }

  .page-about .tl-node > .tl-index {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
    padding-top: 5px;
  }

  .page-about .tl-node > h3 {
    grid-column: 2;
    grid-row: 1;
    margin-bottom: 10px;
  }

  .page-about .tl-node > p {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .timeline {
    padding-left: 34px;
  }

  .page-about .tl-node::before {
    left: -34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node::before,
  .page-about .col-cell,
  .page-about .outro-pill {
    transition: none;
  }

  .page-about .outro-pill:hover {
    transform: none;
  }
}