/* ================= 品牌概况页面专属样式 ================= */
.page-about {
  --about-purple-glow: rgba(123, 47, 190, 0.35);
  --about-green-line: rgba(57, 255, 20, 0.55);
  --about-orange-soft: rgba(255, 107, 53, 0.14);
  display: flex;
  flex-direction: column;
  background: var(--light-gray);
  color: var(--dark-gray);
  overflow-x: hidden;
}

/* ---------------- Hero 首屏 ---------------- */
.about-hero {
  position: relative;
  padding: 24px 16px 56px;
  background: var(--purple-gradient);
  color: var(--white);
  overflow: hidden;
}
.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 18%, var(--about-purple-glow), transparent 58%),
    radial-gradient(circle at 8% 92%, rgba(57, 255, 20, 0.1), transparent 46%),
    repeating-linear-gradient(-35deg, transparent 0 24px, rgba(255, 255, 255, 0.04) 24px 25px);
  pointer-events: none;
}
.about-hero-shell {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto;
}
.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 32px;
}
.page-about .breadcrumb a {
  color: var(--warm-orange);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .breadcrumb a:hover {
  color: var(--neon-green);
  text-decoration: underline;
}
.page-about .crumb-sep {
  opacity: 0.5;
  margin: 0 8px;
}
.about-hero-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}
.about-hero-content {
  max-width: 680px;
}
.about-hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--neon-green);
  margin: 0 0 14px;
}
.about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.6vw, 3rem);
  line-height: 1.2;
  margin: 0 0 20px;
  color: var(--white);
}
.about-hero h1 .h1-accent {
  color: var(--neon-green);
}
.about-hero h1 .h1-sep {
  margin: 0 6px;
  color: rgba(255, 255, 255, 0.28);
}
.about-hero-lede {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 28px;
}
.about-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.about-stat {
  min-width: 132px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
  transition: border-color var(--transition), background var(--transition);
}
.about-stat:hover {
  border-color: var(--neon-green);
  background: rgba(255, 255, 255, 0.12);
}
.about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.45rem;
  color: var(--neon-green);
}
.about-stat-label {
  display: block;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.72);
  margin-top: 4px;
}
.about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.about-hero-visual {
  position: relative;
}
.about-hero-img,
.about-milestones-media img,
.about-team-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.about-hero-img {
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 26px 64px rgba(0, 0, 0, 0.36);
}

/* ---------------- 品牌叙事 ---------------- */
.about-story {
  padding: 64px 16px;
}
.about-story-shell {
  display: grid;
  gap: 36px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.about-story-index {
  position: relative;
  align-self: start;
}
.about-label-mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--volt-purple);
  margin: 0 0 10px;
  text-transform: uppercase;
}
.about-story-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--volt-purple);
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--mid-gray);
}
.page-about .meta-line {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mid-gray);
  background: rgba(123, 47, 190, 0.06);
  padding: 6px 10px;
  border-radius: 999px;
}
.about-story-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 16px;
}
.about-story-content p {
  font-size: 0.96rem;
  line-height: 1.8;
  margin: 0 0 14px;
  max-width: 720px;
}
.about-story-cards {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.about-story-card {
  position: relative;
  padding: 24px;
  border-top: 3px solid var(--volt-purple);
  box-shadow: 0 4px 18px rgba(10, 17, 40, 0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}
.about-story-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(10, 17, 40, 0.1);
}
.card-index {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--volt-purple);
  letter-spacing: 0.08em;
}
.about-story-card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin: 10px 0 8px;
}
.about-story-card p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.65;
  color: var(--mid-gray);
}

/* ---------------- 发展里程碑 ---------------- */
.about-milestones {
  position: relative;
  padding: 80px 16px;
  background: var(--deep-blue);
  color: var(--white);
}
.about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.about-milestones .section-shell {
  position: relative;
  z-index: 1;
}
.about-milestones-head {
  display: grid;
  gap: 24px;
  margin-bottom: 48px;
}
.about-milestones-copy {
  max-width: 680px;
}
.about-milestones-head h2,
.about-honors-head h2,
.about-commitment-head h2 {
  font-family: var(--font-heading);
  font-weight: 800;
  margin: 0 0 10px;
}
.about-milestones-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
}
.about-milestones-head p:last-child,
.about-honors-head p:last-child,
.about-commitment-head p:last-child {
  font-size: 0.94rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}
.about-milestones-media img {
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}
.milestone-track {
  position: relative;
  display: grid;
  gap: 32px;
}
.milestone-line {
  display: none;
}
.milestone-item {
  display: grid;
  gap: 12px;
}
.milestone-year {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--neon-green);
  text-shadow: 0 0 18px rgba(57, 255, 20, 0.28);
}
.milestone-card {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  transition: border-color var(--transition), background var(--transition);
}
.milestone-card:hover {
  border-color: rgba(57, 255, 20, 0.6);
  background: rgba(255, 255, 255, 0.1);
}
.milestone-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--neon-green), var(--volt-purple));
}
.milestone-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--about-orange-soft);
  color: var(--warm-orange);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.milestone-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 700;
}
.milestone-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------------- 团队与组织 ---------------- */
.about-team {
  padding: 72px 16px;
}
.about-team-layout {
  display: grid;
  gap: 40px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.about-team-aside h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 800;
  line-height: 1.25;
  margin: 4px 0 14px;
}
.about-team-desc {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--mid-gray);
  margin: 0 0 22px;
  max-width: 560px;
}
.about-team-total {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius);
  background: rgba(123, 47, 190, 0.08);
  margin-bottom: 20px;
}
.about-team-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--volt-purple);
}
.about-team-label {
  font-size: 0.86rem;
  color: var(--mid-gray);
}
.about-team-img {
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(10, 17, 40, 0.1);
}
.about-team-diagram {
  display: grid;
  gap: 24px;
  align-content: start;
}
.about-team-svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(10, 17, 40, 0.08);
  background: var(--white);
  box-shadow: 0 10px 32px rgba(10, 17, 40, 0.06);
}
.team-org-links line {
  stroke: rgba(123, 47, 190, 0.42);
  stroke-width: 2;
  stroke-dasharray: 6 5;
}
.team-org-hub circle {
  fill: var(--volt-purple);
  filter: drop-shadow(0 0 14px rgba(123, 47, 190, 0.5));
}
.team-org-hub-name {
  fill: var(--white);
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
}
.team-org-hub-sub {
  fill: rgba(255, 255, 255, 0.82);
  font-family: var(--font-mono);
  font-size: 10px;
}
.team-org-node rect {
  fill: var(--deep-blue);
  stroke: var(--volt-purple);
  stroke-width: 1.5;
}
.team-org-node-name {
  fill: var(--white);
  font-size: 13px;
  font-weight: 600;
}
.team-org-node-sub {
  fill: var(--neon-green);
  font-family: var(--font-mono);
  font-size: 9px;
}
.team-org-dot {
  fill: var(--neon-green);
}
.team-dept-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.team-dept {
  border: 1px solid rgba(10, 17, 40, 0.1);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  transition: border-color var(--transition);
}
.team-dept[open] {
  border-color: var(--volt-purple);
}
.team-dept summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-weight: 700;
  font-size: 0.95rem;
}
.team-dept summary::-webkit-details-marker {
  display: none;
}
.team-dept summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--warm-orange);
  transition: transform var(--transition);
}
.team-dept[open] summary::before {
  transform: rotate(45deg);
}
.team-dept p {
  margin: 0;
  padding: 0 20px 16px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--mid-gray);
}

/* ---------------- 资质与荣誉 ---------------- */
.about-honors {
  position: relative;
  padding: 80px 16px;
  border-top: 4px solid var(--volt-purple);
  background: var(--deep-blue);
  color: var(--white);
}
.about-honors-head {
  margin-bottom: 40px;
}
.about-honors-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
}
.about-honors-grid {
  display: grid;
  gap: 20px;
}
.honor-badge {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.honor-badge:hover,
.honor-badge:focus-visible {
  border-color: var(--neon-green);
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-3px);
}
.honor-badge:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: 2px;
}
.honor-icon {
  display: block;
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 14px;
}
.honor-badge h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
}
.honor-badge p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.72);
}
.honor-detail {
  display: block;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 0.77rem;
  line-height: 1.6;
  color: var(--neon-green);
}

/* ---------------- 服务承诺 ---------------- */
.about-commitment {
  padding: 72px 16px;
  background: var(--light-gray);
}
.about-commitment-head {
  max-width: 680px;
  margin-bottom: 40px;
}
.about-commitment-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  color: var(--dark-gray);
}
.about-commitment-head p:last-child {
  color: var(--mid-gray);
}
.commitment-grid {
  display: grid;
  gap: 20px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.commitment-item {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--white);
  border-left: 4px solid var(--volt-purple);
  box-shadow: 0 6px 24px rgba(10, 17, 40, 0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}
.commitment-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(10, 17, 40, 0.1);
}
.commitment-code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--volt-purple);
}
.commitment-item h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin: 8px 0 10px;
  color: var(--dark-gray);
}
.commitment-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--mid-gray);
}
.about-commitment-footer {
  max-width: var(--container-width);
  margin: 48px auto 0;
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
  background: var(--deep-blue);
  color: var(--white);
}
.about-commitment-footer p {
  margin: 0 0 22px;
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.84);
}
.about-commitment-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ---------------- 桌面端布局 ---------------- */
@media (min-width: 900px) {
  .about-hero {
    padding: 32px 24px 72px;
  }
  .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
  .about-story {
    padding: 88px 24px;
  }
  .about-story-shell {
    grid-template-columns: minmax(220px, 320px) 1fr;
    gap: 56px;
  }
  .about-story-index {
    position: sticky;
    top: 96px;
  }
  .about-story-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-milestones {
    padding: 96px 24px;
  }
  .about-milestones-head {
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: center;
  }
  .milestone-track {
    display: block;
  }
  .milestone-line {
    display: block;
    position: absolute;
    left: 154px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--neon-green) 0%, var(--volt-purple) 72%, transparent 100%);
    box-shadow: 0 0 16px var(--about-green-line);
  }
  .milestone-item {
    display: grid;
    grid-template-columns: 130px 48px 1fr;
    grid-template-areas: "year groove card";
    gap: 0;
    align-items: start;
    padding: 20px 0 40px;
  }
  .milestone-item::before {
    content: "";
    grid-area: groove;
    justify-self: center;
    align-self: start;
    margin-top: 16px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--neon-green);
    border: 3px solid var(--deep-blue);
    box-shadow: 0 0 14px rgba(57, 255, 20, 0.8);
  }
  .milestone-year {
    grid-area: year;
    text-align: right;
    padding-right: 0;
    font-size: 2.6rem;
    padding-top: 4px;
  }
  .milestone-card {
    grid-area: card;
    margin-left: 28px;
  }
  .about-team {
    padding: 96px 24px;
  }
  .about-team-layout {
    grid-template-columns: minmax(280px, 380px) 1fr;
    gap: 56px;
    align-items: start;
  }
  .about-team-diagram {
    position: sticky;
    top: 96px;
  }
  .about-honors {
    padding: 96px 24px;
  }
  .about-honors-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .honor-detail {
    display: none;
  }
  .honor-badge:hover .honor-detail,
  .honor-badge:focus-visible .honor-detail {
    display: block;
  }
  .about-commitment {
    padding: 96px 24px;
  }
  .commitment-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .about-honors-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .about-stat,
  .about-story-card,
  .milestone-card,
  .honor-badge,
  .commitment-item {
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  }
  .about-hero-img {
    animation: about-hero-fade 400ms ease-out both;
  }
  @keyframes about-hero-fade {
    from {
      opacity: 0;
      transform: translateY(12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}