.page-main.page-about {
  --about-gold: var(--clr-gold);
  --about-deep: var(--clr-deep);
  --about-mid: var(--clr-blue-mid);
  --about-grad: var(--clr-blue-grad);
  --about-line: var(--clr-line);
  --about-light: var(--clr-light);
  --about-gray: var(--clr-gray);
  background: linear-gradient(180deg, #0A1F44 0%, #0D2A58 48%, #081A38 100%);
  color: var(--clr-white);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about section[id] {
  scroll-margin-top: 96px;
}

/* ===== 英雄区 ===== */
.about-hero {
  position: relative;
  padding: clamp(32px, 6vh, 64px) 0 clamp(40px, 8vh, 88px);
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.85), transparent 90%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.85), transparent 90%);
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -4%;
  width: min(46vw, 560px);
  height: min(46vw, 560px);
  background: radial-gradient(circle, rgba(255,215,0,.2) 0%, transparent 62%);
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  z-index: 2;
}

.about-crumb {
  margin-bottom: 32px;
}

.page-about .about-crumb {
  color: var(--about-gray);
  font-size: 14px;
}

.about-crumb a {
  color: var(--about-gray);
  text-decoration: none;
}

.about-crumb a:hover {
  color: var(--about-gold);
}

.about-crumb .sep {
  margin: 0 8px;
  color: rgba(169,184,206,.55);
}

.about-hero-grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

@media (min-width: 1024px) {
  .about-hero-grid {
    grid-template-columns: 1.35fr .65fr;
    gap: 48px;
    align-items: stretch;
  }
}

.about-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid rgba(255,215,0,.45);
  border-radius: 999px;
  color: var(--about-gold);
  font-size: 13px;
  letter-spacing: .16em;
  background: rgba(10,31,68,.7);
  width: fit-content;
}

.about-hero-title {
  margin: 20px 0 0;
  max-width: 960px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(40px, 7.2vw, 82px);
  line-height: 1.04;
  text-transform: uppercase;
  letter-spacing: .01em;
  color: var(--clr-white);
}

.about-hero-title em {
  font-style: normal;
  color: var(--about-gold);
}

.about-hero-desc {
  margin: 22px 0 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255,255,255,.86);
}

.about-hero-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.about-hero-nav a {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  color: var(--about-gray);
  font-size: 14px;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.about-hero-nav a:hover {
  border-color: var(--about-gold);
  color: var(--about-gold);
  background: rgba(255,215,0,.08);
}

.about-hero-side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 24px 0 4px;
  border-top: 1px solid rgba(255,255,255,.18);
}

@media (min-width: 1024px) {
  .about-hero-side {
    align-items: flex-end;
    text-align: right;
    border-top: 0;
    border-left: 1px solid rgba(255,255,255,.18);
    padding: 0 0 8px 40px;
  }
}

.about-since-label {
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: .38em;
  color: var(--about-gray);
}

.about-since-num {
  font-family: var(--font-head);
  font-size: clamp(72px, 10vw, 120px);
  line-height: .92;
  color: var(--about-gold);
}

.about-since-ver {
  margin-top: 14px;
  padding: 5px 14px;
  border: 1px solid rgba(255,215,0,.6);
  border-radius: 999px;
  color: var(--about-gold);
  font-size: 13px;
  letter-spacing: .1em;
  background: rgba(255,215,0,.06);
}

.page-about .data-line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--about-gold) 50%, transparent 100%);
  opacity: .75;
  z-index: 3;
  animation: about-data-flow 4s ease-in-out infinite;
}

@keyframes about-data-flow {
  0% { transform: translateX(-16%); opacity: .3; }
  50% { transform: translateX(16%); opacity: .85; }
  100% { transform: translateX(-16%); opacity: .3; }
}

/* ===== 01 品牌故事 ===== */
.about-story {
  position: relative;
  padding: 0 0 80px;
}

.about-story::before {
  content: "01";
  position: absolute;
  top: -30px;
  right: 0;
  font-family: var(--font-head);
  font-size: clamp(90px, 20vw, 220px);
  line-height: 1;
  color: rgba(255,215,0,.07);
  z-index: 0;
  pointer-events: none;
  user-select: none;
}

.about-story-layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  align-items: center;
}

@media (min-width: 900px) {
  .about-story-layout {
    grid-template-columns: 1.1fr .9fr;
    gap: 60px;
  }
}

.page-about .about-story .section-kicker {
  color: var(--about-gold);
}

.page-about .about-story .section-title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.16;
  color: var(--clr-white);
}

.about-story-copy p {
  color: rgba(255,255,255,.82);
  line-height: 1.75;
  font-size: 15px;
}

.about-story-copy p + p {
  margin-top: 12px;
}

.about-story-lead {
  font-size: 18px !important;
  line-height: 1.7 !important;
  color: var(--clr-white) !important;
  border-left: 3px solid var(--about-gold);
  padding-left: 16px;
}

.about-story-media {
  margin: 0;
}

.about-story-media img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: var(--shadow-float);
}

.about-story-media figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: var(--about-gray);
  font-size: 14px;
}

.about-story-media figcaption::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--about-gold);
}

/* ===== 02 发展历程 ===== */
.about-journey {
  position: relative;
  padding: 0 0 80px;
}

.about-journey::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.7), transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.7), transparent 82%);
  pointer-events: none;
}

.about-journey .container {
  position: relative;
  z-index: 1;
}

.about-head {
  max-width: 760px;
}

.about-head-desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,.68);
}

.page-about .about-journey .section-kicker {
  color: var(--about-gold);
}

.page-about .about-journey .section-title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.14;
  color: var(--clr-white);
}

.about-timeline {
  position: relative;
  max-width: 920px;
  margin: 40px auto 0;
}

.about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-gold) 0%, rgba(255,215,0,.2) 34%, rgba(255,255,255,.08) 70%, transparent);
}

.timeline-item {
  position: relative;
  padding: 0 0 44px 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  top: 14px;
  left: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-marker::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-gold);
  box-shadow: 0 0 0 4px rgba(255,215,0,.18), 0 0 18px rgba(255,215,0,.55);
}

.timeline-card {
  background: linear-gradient(145deg, rgba(27,58,107,.78), rgba(10,31,68,.72));
  border: 1px solid var(--about-line);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.timeline-card:hover {
  border-color: rgba(255,215,0,.65);
  transform: translateY(-2px);
}

.timeline-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.timeline-index {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1;
  color: rgba(255,215,0,.26);
}

.timeline-year {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--about-gold);
  color: var(--about-deep);
}

.timeline-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 20px;
  line-height: 1.3;
  color: var(--clr-white);
}

.timeline-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,.76);
}

.timeline-detail {
  margin-top: 12px;
}

.timeline-detail summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--about-gold);
  list-style: none;
}

.timeline-detail summary::-webkit-details-marker {
  display: none;
}

.timeline-detail summary::before {
  content: "＋";
  font-size: 15px;
  line-height: 1;
  transition: transform var(--transition);
}

.timeline-detail[open] summary::before {
  transform: rotate(45deg);
}

.timeline-detail p {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid rgba(255,215,0,.5);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255,255,255,.66);
}

@media (min-width: 768px) {
  .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .timeline-item {
    width: 50%;
    padding: 0 48px 48px 0;
  }

  .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 48px 48px;
  }

  .timeline-item:last-child {
    padding-bottom: 0;
  }

  .timeline-item:nth-child(odd) .timeline-marker {
    left: auto;
    right: 0;
    transform: translateX(50%);
  }

  .timeline-item:nth-child(even) .timeline-marker {
    left: 0;
    transform: translateX(-50%);
  }

  .timeline-card {
    padding: 28px;
  }
}

/* ===== 03 核心数据 ===== */
.about-stats {
  position: relative;
  background: var(--about-light);
  color: var(--about-deep);
  padding: 56px 0;
}

.page-about .about-stats .section-kicker {
  color: var(--clr-red);
}

.page-about .about-stats .section-title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.14;
  color: var(--about-deep);
}

.about-stats .about-head-desc {
  color: rgba(10,31,68,.66);
}

.about-stats-grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

@media (min-width: 640px) {
  .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.about-stat-card {
  background: var(--clr-white);
  border: 1px solid #E0E8F2;
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: 0 6px 20px rgba(10,31,68,.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.about-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(10,31,68,.12);
}

.page-about .about-stat-card .stat {
  display: block;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: clamp(40px, 5.6vw, 56px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--about-deep);
}

.about-stat-card .stat::before {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--about-gold);
  margin-bottom: 10px;
}

.page-about .about-stat-card .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--about-mid);
}

.about-stat-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: #526580;
}

.about-stats-panel {
  margin-top: 24px;
  border-radius: var(--radius-card);
  background: linear-gradient(145deg, var(--about-grad), var(--about-deep));
  color: var(--clr-white);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.page-about .about-stats-panel .panel-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255,255,255,.14);
}

.page-about .about-stats-panel .panel-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--about-gold);
  box-shadow: 0 0 10px rgba(255,215,0,.85);
  flex-shrink: 0;
}

.page-about .about-stats-panel .panel-title {
  flex: 1;
  font-size: 14px;
  color: rgba(255,255,255,.9);
  letter-spacing: .04em;
}

.about-stats-panel .panel-version {
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--about-gold);
}

.about-stats-panel-body {
  display: grid;
  gap: 18px;
  padding: 24px 20px;
}

@media (min-width: 768px) {
  .about-stats-panel-body {
    grid-template-columns: 1fr 1fr auto;
    align-items: center;
  }
}

.about-panel-kicker {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--about-gray);
  margin-bottom: 6px;
}

.about-panel-value {
  font-size: 17px;
  font-weight: 500;
  color: var(--clr-white);
}

.about-panel-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.about-stats-media {
  margin: 24px 0 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid #E0E8F2;
  background: var(--clr-white);
}

.about-stats-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about-stats-media figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: var(--about-deep);
  color: var(--about-gray);
  font-size: 14px;
}

.about-stats-media figcaption::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--about-gold);
}

/* ===== 04 团队与技术 ===== */
.about-team {
  padding: 80px 0;
}

.about-team-layout {
  display: grid;
  gap: 36px;
  align-items: center;
}

@media (min-width: 900px) {
  .about-team-layout {
    grid-template-columns: 1.15fr .85fr;
    gap: 64px;
  }
}

.page-about .about-team .section-kicker {
  color: var(--about-gold);
}

.page-about .about-team .section-title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.14;
  color: var(--clr-white);
}

.about-team-copy p {
  color: rgba(255,255,255,.82);
  line-height: 1.75;
}

.about-team-lead {
  margin-top: 18px;
  font-size: 18px;
  line-height: 1.7;
  color: var(--clr-white);
  border-left: 3px solid var(--about-gold);
  padding-left: 16px;
}

.about-pillars {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.pillar {
  padding: 20px;
  border: 1px solid var(--about-line);
  border-radius: 16px;
  background: rgba(27,58,107,.35);
  transition: border-color var(--transition), background var(--transition);
}

.pillar:hover {
  border-color: rgba(255,215,0,.6);
  background: rgba(27,58,107,.55);
}

.pillar-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--about-gold);
}

.pillar h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  color: var(--clr-white);
}

.pillar p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.72);
}

.about-team-media {
  margin: 0;
}

.about-team-media img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: var(--shadow-lift);
}

.about-team-media figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: var(--about-gray);
  font-size: 14px;
}

.about-team-media figcaption::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--about-gold);
}

/* ===== 05 用户认可 ===== */
.about-honor {
  padding: 40px 0 80px;
}

.about-honor-box {
  position: relative;
  padding: 56px 24px 48px;
  border-radius: 28px;
  border: 1px solid rgba(255,215,0,.45);
  background: linear-gradient(135deg, rgba(10,31,68,.96), rgba(34,76,138,.74));
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-lift);
}

.about-honor-box::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,215,0,.22), transparent 68%);
  pointer-events: none;
}

.about-honor-box::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,215,0,.12), transparent 70%);
  pointer-events: none;
}

.about-honor-title {
  position: relative;
  z-index: 1;
  margin: 20px auto 16px;
  max-width: 680px;
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.14;
  color: var(--clr-white);
}

.about-honor-desc {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto 30px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255,255,255,.78);
}

.about-honor-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .data-line,
  .timeline-marker::before {
    animation: none;
  }
}