/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --about-orange: #E86A33;
  --about-green-deep: #1F4A38;
  --about-green-light: #4A7C63;
  --about-sand: #C99F55;
  --about-terracotta: #B46A4E;
  --about-metal: #7A8492;
  --about-stone: #3C444C;
  --about-cream: #F5F1EA;
  --about-white: #FFFFFF;
  --about-dark: #152E24;

  background-color: var(--about-cream);
  color: var(--about-stone);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about a {
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .section-heading {
  font-family: var(--font-head);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--about-green-deep);
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-orange);
  margin-bottom: 1rem;
}

.page-about .eyebrow::before {
  content: "";
  display: block;
  width: 2.5rem;
  height: 2px;
  background: currentColor;
}

.page-about .card {
  background: var(--about-white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 1px 0 rgba(31, 74, 56, 0.06);
}

.page-about .tag {
  display: inline-block;
  background: rgba(201, 159, 85, 0.16);
  color: #8a6a2f;
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.85rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 400;
  margin-bottom: 0.85rem;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  padding: 0.75rem 1.8rem;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.page-about .btn--primary {
  background: var(--about-orange);
  color: var(--about-white);
}

.page-about .btn--primary:hover {
  background: #d45a26;
  transform: translateY(-1px);
}

.page-about .btn--outline {
  background: transparent;
  color: var(--about-green-deep);
  border-color: var(--about-green-light);
}

.page-about .btn--outline:hover {
  background: var(--about-green-deep);
  color: var(--about-white);
  border-color: var(--about-green-deep);
}

.page-about .side-note {
  background: rgba(74, 124, 99, 0.08);
  border-left: 3px solid var(--about-green-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.4rem;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--about-stone);
}

.page-about .side-note__label {
  display: block;
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--about-green-deep);
  margin-bottom: 0.5rem;
}

/* ---------- 首屏 Hero ---------- */
.page-about__hero {
  position: relative;
  background: var(--about-green-deep);
  color: var(--about-cream);
  padding: 3rem 0 5rem;
  overflow: hidden;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3.5rem;
  background: var(--about-cream);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  transform: translateY(40%);
  z-index: 2;
}

.page-about__hero-inner {
  position: relative;
  z-index: 1;
}

.page-about__hero-layout {
  display: grid;
  gap: 2rem;
  margin-top: 3rem;
  align-items: center;
}

.page-about__hero-copy {
  text-align: left;
}

.page-about__hero-title {
  font-family: var(--font-head);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.05;
  color: var(--about-white);
  margin: 1rem 0 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-about__hero-lead {
  font-size: 1rem;
  line-height: 1.85;
  max-width: 46rem;
  color: rgba(245, 241, 234, 0.85);
  margin-bottom: 2rem;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.page-about__hero-actions .btn--primary {
  background: var(--about-orange);
}

.page-about__hero-actions .btn--outline {
  border-color: rgba(245, 241, 234, 0.6);
  color: var(--about-cream);
}

.page-about__hero-actions .btn--outline:hover {
  border-color: var(--about-orange);
  background: rgba(232, 106, 51, 0.12);
}

.page-about__hero-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.page-about__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 8;
}

.page-about__hero-slant {
  position: absolute;
  top: 0;
  right: -10%;
  width: 55%;
  height: 100%;
  background: linear-gradient(135deg, transparent 20%, rgba(232, 106, 51, 0.20) 100%);
  clip-path: polygon(25% 0, 100% 0, 85% 100%, 0 100%);
  z-index: 0;
  pointer-events: none;
}

.page-about__hero-contours {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.7;
}

/* ---------- 平台由来 ---------- */
.page-about__intro {
  padding: 5rem 0 3rem;
  background: var(--about-cream);
}

.page-about__intro-grid {
  display: grid;
  gap: 2rem;
}

.page-about__intro-copy p {
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 1rem;
  max-width: 52rem;
}

.page-about__intro-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-top: 2rem;
  background: var(--about-white);
  border: 1px solid rgba(74, 124, 99, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.2rem;
}

.page-about__intro-stat {
  text-align: center;
  padding: 0.5rem 0.25rem;
}

.page-about__intro-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--about-green-deep);
  line-height: 1.2;
}

.page-about__intro-label {
  display: block;
  font-size: 0.7rem;
  color: var(--about-metal);
  margin-top: 0.3rem;
}

/* ---------- 时间轴 ---------- */
.page-about__timeline {
  position: relative;
  padding: 4rem 0 5rem;
  background: var(--about-white);
  overflow: hidden;
}

.page-about__timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.page-about__timeline-head {
  position: relative;
  z-index: 1;
  margin-bottom: 3.5rem;
  max-width: 42rem;
}

.page-about__timeline-lead {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--about-metal);
}

.page-about__timeline-track {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about__milestone {
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid rgba(74, 124, 99, 0.3);
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: -0.45rem;
  top: 1.3rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-green-light);
  border: 2px solid var(--about-white);
  box-shadow: 0 0 0 2px var(--about-green-light);
}

.page-about__milestone-year {
  display: inline-block;
  background: var(--about-green-deep);
  color: var(--about-white);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.35rem 1.1rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.9rem;
  letter-spacing: 0.08em;
}

.page-about__milestone-card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--about-green-deep);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.page-about__milestone-card p {
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--about-stone);
  margin-bottom: 1rem;
}

.page-about__milestone-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(31, 74, 56, 0.08);
}

.page-about__milestone-meta div {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.7rem 1rem 0.2rem 0;
}

.page-about__milestone-meta dt {
  font-size: 0.72rem;
  color: var(--about-metal);
}

.page-about__milestone-meta dd {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--about-orange);
  margin: 0;
}

/* ---------- 测试版索引 ---------- */
.page-about__feature {
  padding: 4.5rem 0;
  background: var(--about-cream);
  position: relative;
}

.page-about__feature::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 35%;
  height: 100%;
  background: linear-gradient(145deg, rgba(74, 124, 99, 0.10) 0%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
  pointer-events: none;
}

.page-about__feature-grid {
  display: grid;
  gap: 2.2rem;
  align-items: center;
}

.page-about__feature-copy {
  position: relative;
  z-index: 1;
}

.page-about__feature-copy p {
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 1rem;
}

.page-about__feature-list {
  list-style: none;
  margin: 1.5rem 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about__feature-list li {
  position: relative;
  background: var(--about-white);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--about-orange);
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-about__feature-list strong {
  color: var(--about-green-deep);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-right: 0.4rem;
}

.page-about__feature-copy .editorial-note {
  background: rgba(201, 159, 85, 0.12);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 1.2rem 0 1.4rem;
  font-size: 0.85rem;
  color: #6d5423;
}

.page-about__feature-copy .editorial-note p {
  margin: 0;
}

.page-about__feature-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(31, 74, 56, 0.12);
}

.page-about__feature-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

/* ---------- 团队与运营 ---------- */
.page-about__team {
  padding: 4.5rem 0;
  background: var(--about-green-deep);
  color: var(--about-cream);
}

.page-about__team-layout {
  display: grid;
  gap: 2rem;
}

.page-about__team-copy .section-heading {
  color: var(--about-white);
}

.page-about__team-copy .eyebrow {
  color: var(--about-orange);
}

.page-about__team-copy > p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(245, 241, 234, 0.8);
  max-width: 48rem;
  margin-bottom: 2rem;
}

.page-about__team-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.page-about__team-stat {
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
  transition: background-color 0.25s ease;
}

.page-about__team-stat:hover {
  background: rgba(232, 106, 51, 0.18);
}

.page-about__team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1.2;
  color: var(--about-orange);
}

.page-about__team-label {
  display: block;
  font-size: 0.75rem;
  color: rgba(245, 241, 234, 0.7);
  margin-top: 0.3rem;
}

.page-about__team-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.25);
}

.page-about__team-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-about__team-layout .side-note {
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--about-orange);
  color: rgba(245, 241, 234, 0.8);
}

.page-about__team-layout .side-note__label {
  color: var(--about-sand);
}

/* ---------- 理念 ---------- */
.page-about__philosophy {
  padding: 5rem 0;
  background: var(--about-cream);
  position: relative;
  overflow: hidden;
}

.page-about__philosophy::before {
  content: "";
  position: absolute;
  right: -15%;
  bottom: -20%;
  width: 60%;
  height: 60%;
  background: linear-gradient(135deg, transparent 30%, rgba(180, 106, 78, 0.18) 100%);
  clip-path: polygon(20% 0, 100% 0, 80% 100%, 0 100%);
}

.page-about__philosophy-panel {
  position: relative;
  z-index: 1;
  background: var(--about-green-deep);
  border-radius: var(--radius-lg);
  padding: 3rem 1.8rem;
  text-align: center;
  box-shadow: 0 16px 48px rgba(21, 46, 36, 0.25);
}

.page-about__philosophy-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--about-sand);
  margin-bottom: 1.2rem;
}

.page-about__philosophy-title {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--about-white);
  line-height: 1.1;
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}

.page-about__philosophy-text {
  font-size: 0.98rem;
  line-height: 1.9;
  color: rgba(245, 241, 234, 0.8);
  max-width: 42rem;
  margin: 0 auto 2rem;
  text-align: left;
}

.page-about__philosophy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  justify-content: center;
}

.page-about__philosophy-actions .btn--primary {
  background: var(--about-orange);
}

.page-about__philosophy-actions .btn--outline {
  border-color: rgba(245, 241, 234, 0.6);
  color: var(--about-cream);
}

.page-about__philosophy-actions .btn--outline:hover {
  border-color: var(--about-orange);
  background: rgba(232, 106, 51, 0.15);
}

/* ---------- 响应式适配 ---------- */
@media (min-width: 700px) {
  .page-about__hero-title {
    font-size: 4rem;
  }

  .page-about__intro-grid {
    grid-template-columns: 3fr 1.4fr;
    align-items: start;
  }

  .page-about__team-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__feature-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-about__team-layout {
    grid-template-columns: 1fr 0.85fr;
    align-items: start;
  }

  .page-about__team-layout .side-note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about__hero {
    padding: 4.5rem 0 7rem;
  }

  .page-about__hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-about__hero-title {
    font-size: 4.6rem;
  }

  .page-about__hero-lead {
    font-size: 1.05rem;
  }

  .page-about__intro-stats {
    padding: 1.8rem 1.5rem;
  }

  .page-about__intro-num {
    font-size: 2.2rem;
  }

  .page-about__timeline-track {
    gap: 0;
  }

  .page-about__milestone {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 3rem;
    padding-left: 0;
    border-left: none;
    position: relative;
    width: 80%;
    margin-bottom: 3rem;
  }

  .page-about__milestone--one {
    align-self: flex-start;
  }

  .page-about__milestone--two {
    align-self: flex-end;
  }

  .page-about__milestone--three {
    align-self: flex-start;
  }

  .page-about__milestone::before {
    left: auto;
  }

  .page-about__milestone--one::before {
    right: -0.5rem;
    left: auto;
  }

  .page-about__milestone--two::before {
    left: -0.5rem;
  }

  .page-about__milestone--three::before {
    right: -0.5rem;
    left: auto;
  }

  .page-about__milestone-year {
    justify-self: start;
    margin-top: 0.4rem;
    font-size: 1.1rem;
  }

  .page-about__milestone-card {
    padding: 2rem;
  }

  .page-about__milestone-card h3 {
    font-size: 1.4rem;
  }

  .page-about__milestone-card p {
    font-size: 0.95rem;
  }

  .page-about__feature {
    padding: 6rem 0;
  }

  .page-about__feature-copy p {
    font-size: 1rem;
  }

  .page-about__team {
    padding: 6rem 0;
  }

  .page-about__team-layout {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-about__team-layout .side-note {
    grid-column: 1 / -1;
    max-width: 24rem;
  }

  .page-about__philosophy-panel {
    padding: 4.5rem 4rem;
  }

  .page-about__philosophy-title {
    font-size: 4rem;
  }
}

@media (min-width: 1200px) {
  .page-about__hero-title {
    font-size: 5.2rem;
  }

  .page-about__intro {
    padding: 6rem 0 4rem;
  }

  .page-about__timeline {
    padding: 5rem 0 6rem;
  }

  .page-about__milestone--two {
    margin-right: -5%;
  }
}