.page-about {
  --about-lead-gap: clamp(20px, 3vw, 36px);
  --about-block-gap: clamp(48px, 8vw, 104px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(14px, 2.4vw, 28px);
}
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--fog);
}
.page-about .crumbs a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--electric-cyan);
  border-bottom-color: currentColor;
}
.page-about .crumbs span[aria-current="page"] {
  color: var(--snow);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(26px, 4vw, 46px) 0 clamp(44px, 7vw, 84px);
}

.page-about .about-hero-checker {
  position: absolute;
  top: -18%;
  right: -16%;
  width: min(620px, 92vw);
  aspect-ratio: 1 / 1;
  background-image:
    linear-gradient(45deg, rgba(226, 58, 58, 0.16) 25%, transparent 25%, transparent 75%, rgba(226, 58, 58, 0.16) 75%),
    linear-gradient(45deg, rgba(226, 58, 58, 0.16) 25%, transparent 25%, transparent 75%, rgba(226, 58, 58, 0.16) 75%);
  background-size: 72px 72px;
  background-position: 0 0, 36px 36px;
  border-radius: 50%;
  -webkit-mask-image: radial-gradient(circle at 42% 46%, #000 26%, transparent 70%);
  mask-image: radial-gradient(circle at 42% 46%, #000 26%, transparent 70%);
  opacity: 0.7;
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero-slash {
  position: absolute;
  left: -8%;
  bottom: -14%;
  width: 118%;
  height: 42%;
  background: linear-gradient(104deg,
    rgba(226, 58, 58, 0.34) 0 18%,
    rgba(168, 31, 46, 0.26) 18% 28%,
    transparent 28%);
  transform: skewY(-4.5deg);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero-shell {
  display: grid;
  gap: var(--about-lead-gap);
}

.page-about .about-hero-eyebrow {
  margin: 0;
}

.page-about .about-hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 13.5vw, 8.4rem);
  line-height: 0.9;
  letter-spacing: -0.025em;
  color: var(--snow);
  text-shadow: 0 26px 60px rgba(0, 0, 0, 0.6);
}

.page-about .about-hero-lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(1rem, 1.35vw, 1.14rem);
  line-height: 1.85;
  color: var(--snow);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero-actions .btn {
  text-decoration: none;
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: clamp(18px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 30px);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-stat-num {
  font-family: var(--font-numeric);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--warm-gold);
  letter-spacing: -0.02em;
}
.page-about .about-stat-label {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--fog);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-origin .about-origin-shell {
  display: grid;
  gap: var(--about-lead-gap);
}

.page-about .about-origin-head h2 {
  margin: 10px 0 0;
  color: var(--snow);
}

.page-about .about-origin-copy {
  display: grid;
  gap: 18px;
}
.page-about .about-origin-copy p {
  margin: 0;
  max-width: 64ch;
  line-height: 1.9;
  color: rgba(247, 249, 252, 0.82);
}

.page-about .about-origin-note {
  background: linear-gradient(150deg, rgba(16, 36, 63, 0.94), rgba(11, 27, 51, 0.94));
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--check-red);
}
.page-about .about-note-kicker {
  margin: 0 0 14px;
  font-family: var(--font-edition);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--snow);
}
.page-about .about-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-note-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(247, 249, 252, 0.78);
}
.page-about .about-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--electric-cyan);
}
.page-about .about-note-list strong {
  color: var(--warm-gold);
  font-weight: 700;
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}
.page-about .about-tl-head h2 {
  margin: 10px 0 12px;
  color: var(--snow);
}

.page-about .about-tl-media {
  margin: 0 0 clamp(26px, 4.5vw, 48px);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(226, 58, 58, 0.1), rgba(47, 224, 208, 0.06));
}
.page-about .about-tl-media img,
.page-about .about-team-media img,
.page-about .about-workflow-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-tl-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-tl-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 62px;
  display: grid;
  gap: 18px;
}
.page-about .about-tl-track::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg,
    var(--warm-gold) 0%,
    var(--check-red) 34%,
    rgba(47, 224, 208, 0.55) 72%,
    transparent 100%);
  border-radius: var(--pill);
}

.page-about .about-tl-item {
  position: relative;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: rgba(16, 36, 63, 0.72);
  border: 1px solid var(--line-soft);
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -50px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--navy-base);
  border: 2px solid var(--check-red);
  box-shadow: 0 0 0 4px rgba(226, 58, 58, 0.16);
}
.page-about .about-tl-item:hover,
.page-about .about-tl-item:focus-within {
  border-color: rgba(47, 224, 208, 0.44);
  background: rgba(16, 36, 63, 0.92);
  transform: translateX(2px);
}

.page-about .about-tl-year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 12px;
  border-radius: var(--pill);
  background: rgba(245, 185, 66, 0.14);
  border: 1px solid rgba(245, 185, 66, 0.42);
  color: var(--warm-gold);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
}

.page-about .about-tl-title {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.5;
}
.page-about .about-tl-trigger {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: var(--snow);
  font-family: inherit;
  font-size: inherit;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}
.page-about .about-tl-trigger::after {
  content: "＋";
  float: right;
  margin-left: 12px;
  color: var(--electric-cyan);
  font-weight: 400;
}
.page-about .about-tl-trigger[aria-expanded="true"] {
  color: var(--electric-cyan);
}
.page-about .about-tl-trigger[aria-expanded="true"]::after {
  content: "－";
}
.page-about .about-tl-trigger:hover,
.page-about .about-tl-trigger:focus-visible {
  color: var(--electric-cyan);
}

.page-about .about-tl-panel {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-tl-panel p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(247, 249, 252, 0.78);
}

.page-about .about-tl-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-about .about-aside-card {
  padding: clamp(20px, 3vw, 26px);
  border-radius: var(--radius-lg);
  background: rgba(16, 36, 63, 0.7);
  border: 1px solid var(--line-soft);
}
.page-about .about-aside-card--cyan {
  border-color: rgba(47, 224, 208, 0.36);
  background: linear-gradient(160deg, rgba(47, 224, 208, 0.1), rgba(11, 27, 51, 0.86));
}
.page-about .about-aside-card--quiet {
  background: rgba(11, 27, 51, 0.6);
}
.page-about .about-aside-kicker {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
}
.page-about .about-aside-value {
  margin: 0 0 10px;
  font-family: var(--font-numeric);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--warm-gold);
}
.page-about .about-aside-value span {
  margin-left: 6px;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--fog);
}
.page-about .about-aside-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(247, 249, 252, 0.74);
}
.page-about .about-aside-text a {
  color: var(--electric-cyan);
  text-underline-offset: 3px;
}

/* ---------- 团队 ---------- */
.page-about .about-team-shell {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}
.page-about .about-team-copy h2 {
  margin: 10px 0 16px;
  color: var(--snow);
}
.page-about .about-team-copy > p {
  margin: 0;
  max-width: 58ch;
  line-height: 1.9;
  color: rgba(247, 249, 252, 0.82);
}

.page-about .about-roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-role {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(16, 36, 63, 0.62);
  border: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.page-about .about-role:hover,
.page-about .about-role:focus-within,
.page-about .about-role:focus {
  border-left-color: var(--electric-cyan);
  background: rgba(16, 36, 63, 0.9);
  outline: none;
}
.page-about .about-role-chip {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 12px;
  border-radius: var(--pill);
  background: rgba(247, 249, 252, 0.07);
  border: 1px solid var(--line-strong);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--snow);
  transition: color 0.25s ease, border-color 0.25s ease;
}
.page-about .about-role:hover .about-role-chip,
.page-about .about-role:focus-within .about-role-chip,
.page-about .about-role:focus .about-role-chip {
  color: var(--electric-cyan);
  border-color: rgba(47, 224, 208, 0.5);
}
.page-about .about-role-desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(247, 249, 252, 0.74);
}

.page-about .about-team-media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(140deg, rgba(226, 58, 58, 0.12), rgba(11, 27, 51, 0.6));
}

/* ---------- 编辑流程 ---------- */
.page-about .about-workflow-shell {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}
.page-about .about-workflow-media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(47, 224, 208, 0.1), rgba(11, 27, 51, 0.7));
}
.page-about .about-workflow-copy h2 {
  margin: 10px 0 22px;
  color: var(--snow);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: flow;
}
.page-about .about-flow-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(16, 36, 63, 0.6);
  border: 1px solid var(--line-soft);
}
.page-about .about-flow-step {
  font-family: var(--font-numeric);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--check-red);
  line-height: 1.4;
}
.page-about .about-flow-item strong {
  display: block;
  margin-bottom: 6px;
  color: var(--snow);
  font-size: 0.98rem;
}
.page-about .about-flow-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(247, 249, 252, 0.74);
}

/* ---------- 三条产品线 ---------- */
.page-about .about-lines-bento {
  margin-top: clamp(22px, 3vw, 34px);
  gap: clamp(16px, 2.4vw, 22px);
}
.page-about .about-line {
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  background: rgba(16, 36, 63, 0.68);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.28s ease, border-color 0.28s ease;
}
.page-about .about-line:hover {
  transform: translateY(-4px);
}
.page-about .about-line--data {
  border-top: 3px solid var(--electric-cyan);
}
.page-about .about-line--flash {
  border-top: 3px solid var(--warm-gold);
}
.page-about .about-line--review {
  border-top: 3px solid var(--check-red);
}
.page-about .about-line:hover {
  border-color: rgba(47, 224, 208, 0.4);
  border-top-color: inherit;
}
.page-about .about-line h3 {
  margin: 0;
  font-family: var(--font-edition);
  font-size: clamp(1.18rem, 2vw, 1.42rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--snow);
}
.page-about .about-line p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(247, 249, 252, 0.78);
}
.page-about .about-line-list {
  list-style: none;
  margin: auto 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 8px;
}
.page-about .about-line-list li {
  position: relative;
  padding-left: 17px;
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--fog);
}
.page-about .about-line-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: rgba(47, 224, 208, 0.7);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-eco-shell {
  display: grid;
  gap: clamp(34px, 6vw, 68px);
}
.page-about .about-eco-partners h2,
.page-about .about-eco-honors h2 {
  margin: 10px 0 16px;
  color: var(--snow);
}
.page-about .about-eco-partners > p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.9;
  color: rgba(247, 249, 252, 0.82);
}

.page-about .about-eco-figures {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.page-about .about-eco-figures > div {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(11, 27, 51, 0.72);
  border: 1px solid var(--line-soft);
}
.page-about .about-eco-figures dt {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--fog);
  margin-bottom: 8px;
}
.page-about .about-eco-figures dd {
  margin: 0;
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--warm-gold);
}
.page-about .about-eco-figures dd span {
  margin-left: 4px;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--fog);
}

.page-about .about-honor-grid {
  display: grid;
  gap: 16px;
}
.page-about .about-honor {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-lg);
  background: rgba(16, 36, 63, 0.68);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--check-red);
}
.page-about .about-honor--gold {
  border-left-color: var(--warm-gold);
}
.page-about .about-honor-year {
  margin: 0 0 10px;
  font-family: var(--font-numeric);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--warm-gold);
  letter-spacing: 0.06em;
}
.page-about .about-honor h3 {
  margin: 0 0 8px;
  font-size: 1.06rem;
  line-height: 1.5;
  color: var(--snow);
}
.page-about .about-honor p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(247, 249, 252, 0.74);
}

/* ---------- 服务节奏 ---------- */
.page-about .about-pledge {
  position: relative;
}
.page-about .about-pledge-head h2 {
  margin: 10px 0 0;
  color: var(--snow);
}
.page-about .about-pledge-row {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}
.page-about .about-pledge-card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.4vw, 34px);
  border-radius: var(--radius-xl);
  background: linear-gradient(155deg, rgba(16, 36, 63, 0.95), rgba(11, 27, 51, 0.85));
  border: 1px solid var(--line-soft);
}
.page-about .about-pledge-card::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 118px;
  height: 118px;
  background-image:
    linear-gradient(45deg, rgba(247, 249, 252, 0.07) 25%, transparent 25%, transparent 75%, rgba(247, 249, 252, 0.07) 75%),
    linear-gradient(45deg, rgba(247, 249, 252, 0.07) 25%, transparent 25%, transparent 75%, rgba(247, 249, 252, 0.07) 75%);
  background-size: 36px 36px;
  background-position: 0 0, 18px 18px;
  transform: rotate(12deg);
  pointer-events: none;
}
.page-about .about-pledge-time {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--electric-cyan);
  letter-spacing: -0.01em;
}
.page-about .about-pledge-card h3 {
  margin: 0 0 10px;
  font-size: 1.06rem;
  color: var(--snow);
}
.page-about .about-pledge-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(247, 249, 252, 0.76);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next-shell {
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(120deg, rgba(226, 58, 58, 0.2), rgba(11, 27, 51, 0.9) 46%),
    rgba(16, 36, 63, 0.85);
  border: 1px solid var(--line-soft);
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-about .about-next-copy h2 {
  margin: 10px 0 14px;
  color: var(--snow);
}
.page-about .about-next-copy p {
  margin: 0;
  max-width: 56ch;
  line-height: 1.9;
  color: rgba(247, 249, 252, 0.82);
}
.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: center;
}
.page-about .about-next-actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-origin-shell {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.35fr);
    grid-template-areas:
      "head copy"
      "note copy";
    align-items: start;
    column-gap: clamp(28px, 4vw, 56px);
    row-gap: 22px;
  }
  .page-about .about-origin-head {
    grid-area: head;
  }
  .page-about .about-origin-copy {
    grid-area: copy;
  }
  .page-about .about-origin-note {
    grid-area: note;
  }

  .page-about .about-tl-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 52px);
  }
  .page-about .about-tl-track {
    padding-left: 78px;
  }
  .page-about .about-tl-track::before {
    left: 26px;
  }
  .page-about .about-tl-item::before {
    left: -62px;
    top: 30px;
  }

  .page-about .about-team-shell {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    column-gap: clamp(28px, 4vw, 54px);
  }

  .page-about .about-workflow-shell {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    column-gap: clamp(28px, 4vw, 54px);
  }

  .page-about .about-eco-shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(30px, 5vw, 60px);
  }
  .page-about .about-honor-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .about-next-shell {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-about .about-tl-track {
    padding-left: 92px;
  }
  .page-about .about-tl-item::before {
    left: -76px;
  }
  .page-about .about-team-media {
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-item,
  .page-about .about-line,
  .page-about .about-role,
  .page-about .crumbs a {
    transition: none;
  }
  .page-about .about-line:hover,
  .page-about .about-tl-item:hover,
  .page-about .about-tl-item:focus-within {
    transform: none;
  }
}
</main>