/* ===== 页面专属：品牌档案 ===== */
.page-about {
  --hero-min-height: 70vh;
  --num-size: 4.5rem;
  --card-glow: 0 8px 32px rgba(229,57,53,0.12);
  --track-gap: 2rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-dark);
  overflow-x: hidden;
}

/* ── 面包屑 ── */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  padding: 1rem 1.25rem;
  font-size: 0.8rem;
  font-family: var(--font-label);
  color: var(--text-secondary);
  max-width: var(--container-max);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.page-about .breadcrumb a {
  color: var(--accent-silver);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--primary-red);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-primary);
  font-weight: 700;
}

/* ── 英雄区 ── */
.page-about .about-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: var(--hero-min-height);
  margin-top: calc(var(--header-height) * -1);
  padding: calc(var(--header-height) + 2rem) 1.25rem 3rem;
  overflow: hidden;
}
.page-about .hero-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}
.page-about .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(18,18,18,0.92) 30%, rgba(229,57,53,0.35) 80%, rgba(0,180,216,0.15) 100%);
}
.page-about .hero-body {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}
.page-about .hero-heading {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 12vw, 5.5rem);
  line-height: 1.05;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 4px;
  margin: 0 0 0.5rem;
  position: relative;
  display: inline-block;
}
.page-about .hero-heading::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 60%;
  height: 4px;
  background: var(--primary-red);
  transform: skewX(-20deg);
}
.page-about .hero-sub {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 4vw, 1.6rem);
  color: var(--accent-blue);
  letter-spacing: 2px;
  margin: 1.2rem 0 0.6rem;
  text-transform: uppercase;
}
.page-about .hero-summary {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0.8rem 0 1.8rem;
}
.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.page-about .hero-actions .btn {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid var(--primary-red);
  background: var(--primary-red);
  color: #fff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  border-radius: 0;
}
.page-about .hero-actions .btn:hover,
.page-about .hero-actions .btn:focus-visible {
  background: transparent;
  color: var(--primary-red);
  box-shadow: 0 0 24px rgba(229,57,53,0.35);
}
.page-about .hero-actions .btn-outline {
  background: transparent;
  border-color: var(--accent-silver);
  color: var(--accent-silver);
}
.page-about .hero-actions .btn-outline:hover,
.page-about .hero-actions .btn-outline:focus-visible {
  border-color: var(--text-primary);
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
  box-shadow: none;
}

/* ── 目录索引 ── */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
  padding: 1.6rem 1.25rem;
  max-width: var(--container-max);
  margin: 0 auto;
  border-top: 1px solid rgba(192,192,192,0.15);
  border-bottom: 1px solid rgba(192,192,192,0.15);
  position: relative;
  z-index: 1;
}
.page-about .index-label {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-silver);
  opacity: 0.6;
}
.page-about .index-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border: 1px solid transparent;
  transition: all 0.2s;
  font-family: var(--font-body);
}
.page-about .index-item:hover,
.page-about .index-item:focus-visible {
  color: var(--primary-red);
  border-color: rgba(229,57,53,0.3);
  background: var(--emphasis-red-bg);
}
.page-about .index-num {
  font-family: var(--font-label);
  font-size: 0.7rem;
  color: var(--accent-blue);
  opacity: 0.8;
}

/* ── 通用章节结构 ── */
.page-about .section-intro {
  padding: 0 1.25rem;
  max-width: var(--container-max);
  margin: 0 auto 2.5rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin: 0 0 0.6rem;
  position: relative;
  display: inline-block;
}
.page-about .section-title::before {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 50%;
  height: 3px;
  background: var(--primary-red);
  transform: skewX(-20deg);
}
.page-about .section-desc {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin: 0.8rem 0 0;
}
.page-about .section-extra {
  padding: 1.5rem 1.25rem 0;
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.page-about .section-extra .btn {
  padding: 0.6rem 1.6rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid var(--primary-red);
  background: var(--primary-red);
  color: #fff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  border-radius: 0;
}
.page-about .section-extra .btn:hover,
.page-about .section-extra .btn:focus-visible {
  background: transparent;
  color: var(--primary-red);
  box-shadow: 0 0 20px rgba(229,57,53,0.3);
}
.page-about .section-extra .btn-outline {
  background: transparent;
  border-color: var(--accent-silver);
  color: var(--accent-silver);
}
.page-about .section-extra .btn-outline:hover,
.page-about .section-extra .btn-outline:focus-visible {
  border-color: var(--text-primary);
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

/* ── 品牌使命 ── */
.page-about .about-mission {
  padding: 4rem 0 3rem;
  position: relative;
}
.page-about .about-mission::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(180deg, rgba(229,57,53,0.04) 0%, transparent 80%);
  pointer-events: none;
}
.page-about .mission-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.5rem 1.25rem 1.5rem;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-red) rgba(255,255,255,0.06);
  position: relative;
  z-index: 1;
}
.page-about .mission-scroll::-webkit-scrollbar {
  height: 6px;
}
.page-about .mission-scroll::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.04);
  border-radius: 3px;
}
.page-about .mission-scroll::-webkit-scrollbar-thumb {
  background: var(--primary-red);
  border-radius: 3px;
}
.page-about .mission-track {
  display: flex;
  gap: var(--track-gap);
  width: max-content;
  padding: 0.5rem;
  scroll-snap-type: x mandatory;
}
.page-about .mission-item {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.8rem;
  min-width: 280px;
  max-width: 340px;
}
.page-about .mission-num {
  font-family: var(--font-heading);
  font-size: var(--num-size);
  line-height: 1;
  color: var(--primary-red);
  opacity: 0.6;
  letter-spacing: -2px;
  user-select: none;
}
.page-about .mission-card {
  background: rgba(26,26,26,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(229,57,53,0.2);
  padding: 1.6rem 1.8rem;
  box-shadow: var(--card-glow);
  width: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .mission-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(229,57,53,0.2);
}
.page-about .mission-card-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--text-primary);
  margin: 0 0 0.6rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.page-about .mission-card-text {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0;
}

/* ── 我们的服务 ── */
.page-about .about-services {
  padding: 4rem 0 3rem;
  position: relative;
  background: linear-gradient(180deg, rgba(0,180,216,0.03) 0%, transparent 60%);
}
.page-about .services-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
.page-about .service-card {
  background: rgba(26,26,26,0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(192,192,192,0.1);
  padding: 1.6rem 1.8rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease;
  cursor: default;
}
.page-about .service-card:hover {
  transform: translateY(-3px);
  border-color: rgba(229,57,53,0.4);
}
.page-about .service-card::after {
  content: attr(data-desc);
  display: block;
  position: absolute;
  bottom: -2.6rem;
  left: 0;
  right: 0;
  background: var(--primary-black);
  border: 1px solid rgba(229,57,53,0.3);
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  color: var(--accent-silver);
  line-height: 1.4;
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 10;
  font-family: var(--font-body);
}
.page-about .service-card:hover::after {
  opacity: 1;
  transform: translateY(0);
}
.page-about .service-icon {
  color: var(--accent-blue);
  margin-bottom: 0.6rem;
  transition: color 0.25s;
}
.page-about .service-card:hover .service-icon {
  color: var(--primary-red);
}
.page-about .service-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 0.3rem;
}
.page-about .service-brief {
  font-size: 0.85rem;
  color: var(--accent-silver);
  opacity: 0.7;
  margin: 0 0 0.8rem;
  font-family: var(--font-label);
  letter-spacing: 0.5px;
}
.page-about .service-detail {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}
.page-about .services-figure {
  margin: 0;
  flex-shrink: 0;
  width: 100%;
  max-width: 400px;
  align-self: center;
}
.page-about .services-img {
  width: 100%;
  height: auto;
  max-width: 400px;
  display: block;
  border: 1px solid rgba(192,192,192,0.12);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.page-about .services-figure figcaption {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
  font-family: var(--font-label);
  letter-spacing: 0.3px;
  opacity: 0.7;
}

/* ── 数据与真实性 ── */
.page-about .about-data {
  padding: 4rem 0 3rem;
  position: relative;
}
.page-about .about-data::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--primary-red), transparent 80%);
  opacity: 0.25;
}
.page-about .data-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.page-about .data-visual {
  flex-shrink: 0;
  width: 100%;
  max-width: 500px;
  align-self: center;
}
.page-about .data-img {
  width: 100%;
  height: auto;
  max-width: 500px;
  display: block;
  border: 1px solid rgba(0,180,216,0.15);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}
.page-about .data-text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}
.page-about .data-text p {
  margin: 0;
}
.page-about .trust-statement {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--text-primary);
  background: var(--emphasis-red-bg);
  border-left: 4px solid var(--primary-red);
  padding: 1rem 1.4rem;
  margin: 0.4rem 0;
  quotes: none;
  line-height: 1.6;
}
.page-about .data-cta {
  margin-top: 0.4rem;
}
.page-about .data-text .btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.6rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid var(--primary-red);
  background: var(--primary-red);
  color: #fff;
  text-decoration: none;
  transition: all 0.25s ease;
  border-radius: 0;
  align-self: flex-start;
  margin-top: 0.4rem;
}
.page-about .data-text .btn:hover,
.page-about .data-text .btn:focus-visible {
  background: transparent;
  color: var(--primary-red);
  box-shadow: 0 0 20px rgba(229,57,53,0.3);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    --hero-min-height: 65vh;
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .hero-heading::after {
    width: 50%;
  }
  .page-about .about-index {
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .section-intro {
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .section-extra {
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .mission-scroll {
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .mission-item {
    min-width: 320px;
    max-width: 380px;
  }
  .page-about .services-layout {
    flex-direction: row;
    align-items: flex-start;
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .services-grid {
    flex: 1;
    grid-template-columns: 1fr 1fr;
  }
  .page-about .services-figure {
    max-width: 360px;
    align-self: flex-start;
    margin-top: 0.6rem;
  }
  .page-about .data-layout {
    flex-direction: row;
    align-items: flex-start;
    padding-left: 3rem;
    padding-right: 3rem;
  }
  .page-about .data-visual {
    max-width: 480px;
    align-self: flex-start;
    margin-top: 0.4rem;
  }
  .page-about .data-text {
    flex: 1;
  }
}
@media (min-width: 1024px) {
  .page-about .about-hero {
    --hero-min-height: 72vh;
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .about-index {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .section-intro {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .section-extra {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .mission-scroll {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .services-layout {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .services-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-about .services-figure {
    max-width: 320px;
  }
  .page-about .data-layout {
    padding-left: 4rem;
    padding-right: 4rem;
  }
  .page-about .data-visual {
    max-width: 500px;
  }
  .page-about .service-card::after {
    bottom: auto;
    top: -2.6rem;
  }
}
@media (min-width: 1280px) {
  .page-about .about-hero {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .about-index {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .section-intro {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .section-extra {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .mission-scroll {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .services-layout {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
  .page-about .data-layout {
    padding-left: calc((100vw - var(--container-max)) / 2);
    padding-right: calc((100vw - var(--container-max)) / 2);
  }
}