/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --about-bg: #1A1A2E;
  --about-bg-alt: #16213E;
  --about-card-bg: rgba(22, 33, 62, 0.75);
  --about-border: rgba(0, 191, 255, 0.25);
  --about-border-hover: #FF4500;
  --about-glow: 0 0 20px rgba(0, 191, 255, 0.15);
  --about-glow-hover: 0 0 30px rgba(255, 69, 0, 0.25);
  --about-text-light: #F0F0F0;
  --about-text-muted: #A0A0A0;
  --about-radius: 12px;
  --about-transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);

  background-color: var(--about-bg);
  color: var(--about-text-light);
  padding: 0 0 60px 0;
  font-family: var(--font-body, 'Open Sans', sans-serif);
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 0.85rem;
  color: var(--about-text-muted);
  font-family: var(--font-mono, 'Fira Code', monospace);
}
.page-about .breadcrumb a {
  color: var(--primary, #00BFFF);
  text-decoration: none;
  transition: color var(--about-transition);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--accent, #FF4500);
  outline: 2px solid var(--accent, #FF4500);
  outline-offset: 2px;
}
.page-about .breadcrumb span[aria-current="page"] {
  color: var(--about-text-light);
  font-weight: 600;
}
.page-about .breadcrumb a::after {
  content: " / ";
  color: var(--about-text-muted);
  margin: 0 6px;
}

/* ===== 英雄区（左右分屏） ===== */
.page-about__hero {
  display: flex;
  flex-direction: column;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 32px 20px 48px;
  gap: 40px;
  position: relative;
}
.page-about__hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  max-width: 1100px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary, #00BFFF), var(--accent, #FF4500), transparent);
  opacity: 0.5;
}
.page-about__hero-label {
  display: inline-block;
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 0.8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent, #FF4500);
  border: 1px solid var(--accent, #FF4500);
  padding: 4px 14px;
  margin-bottom: 16px;
}
.page-about__hero-text {
  flex: 1 1 50%;
}
.page-about__hero-text h1 {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(2.2rem, 8vw, 4rem);
  line-height: 1.1;
  color: var(--about-text-light);
  margin: 0 0 20px 0;
  position: relative;
  padding-bottom: 20px;
}
.page-about__hero-text h1::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary, #00BFFF), var(--accent, #FF4500));
  margin-top: 16px;
  border-radius: 2px;
}
.page-about__hero-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--about-text-muted);
  margin-bottom: 28px;
  max-width: 520px;
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about__hero-actions .btn {
  padding: 12px 32px;
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid transparent;
  border-radius: 0;
  transition: all var(--about-transition);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.page-about__hero-actions .btn {
  background-color: var(--primary, #00BFFF);
  color: #fff;
  border-color: var(--primary, #00BFFF);
}
.page-about__hero-actions .btn:hover,
.page-about__hero-actions .btn:focus-visible {
  background-color: var(--accent, #FF4500);
  border-color: var(--accent, #FF4500);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 69, 0, 0.3);
}
.page-about__hero-actions .btn--outline {
  background-color: transparent;
  color: var(--primary, #00BFFF);
  border-color: var(--primary, #00BFFF);
}
.page-about__hero-actions .btn--outline:hover,
.page-about__hero-actions .btn--outline:focus-visible {
  background-color: var(--accent, #FF4500);
  color: #fff;
  border-color: var(--accent, #FF4500);
}

/* 英雄区右侧 SVG */
.page-about__hero-visual {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}
.page-about__hero-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 0 30px rgba(0, 191, 255, 0.1));
}

/* SVG 子元素悬停放大 */
.page-about__hero-svg .svg-icon,
.page-about__hero-svg .svg-play,
.page-about__hero-svg .svg-flag,
.page-about__hero-svg .svg-star {
  transition: transform 0.4s ease, fill 0.3s ease, stroke 0.3s ease;
  transform-origin: center;
  cursor: pointer;
}
.page-about__hero-svg .svg-icon:hover,
.page-about__hero-svg .svg-play:hover,
.page-about__hero-svg .svg-flag:hover,
.page-about__hero-svg .svg-star:hover {
  transform: scale(1.25);
}
.page-about__hero-svg .svg-icon-ball:hover {
  stroke: var(--accent, #FF4500);
}
.page-about__hero-svg .svg-icon-screen:hover {
  stroke: var(--accent, #FF4500);
}
.page-about__hero-svg .svg-icon-flag:hover {
  stroke: var(--accent, #FF4500);
}
.page-about__hero-svg .svg-icon-star:hover {
  stroke: var(--primary, #00BFFF);
}
.page-about__hero-svg .svg-dot,
.page-about__hero-svg .svg-dot-center {
  transition: r 0.4s ease, fill 0.3s ease;
}
.page-about__hero-svg .svg-dot:hover,
.page-about__hero-svg .svg-dot-center:hover {
  r: 8;
}
.page-about__hero-svg .svg-ring {
  transition: stroke-width 0.4s ease, stroke 0.3s ease;
}
.page-about__hero-svg .svg-ring:hover {
  stroke-width: 8;
  stroke: url(#heroGrad);
}
.page-about__hero-svg .svg-line {
  transition: opacity 0.3s ease;
}
.page-about__hero-svg .svg-line:hover {
  opacity: 0.8;
}

/* ===== 核心理念区 ===== */
.page-about__mission {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 60px 20px;
}
.page-about__mission .section__title {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  text-align: center;
  margin: 0 0 8px;
  color: var(--about-text-light);
}
.page-about__mission .section__subtitle {
  text-align: center;
  color: var(--about-text-muted);
  font-size: 1rem;
  margin: 0 0 40px;
  font-family: var(--font-mono, 'Fira Code', monospace);
  letter-spacing: 1px;
}

.page-about__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about__card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--about-transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.page-about__card:hover,
.page-about__card:focus-within {
  border-color: var(--about-border-hover);
  box-shadow: var(--about-glow-hover);
  transform: translateY(-6px);
}
.page-about__card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
}
.page-about__card-icon svg {
  width: 100%;
  height: 100%;
}
.page-about__card-icon svg circle:first-child {
  transition: stroke 0.3s ease;
}
.page-about__card:hover .page-about__card-icon svg circle:first-child {
  stroke: var(--accent, #FF4500);
}
.page-about__card h3 {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: 1.3rem;
  margin: 0 0 10px;
  color: var(--primary, #00BFFF);
  transition: color 0.3s ease;
}
.page-about__card:hover h3 {
  color: var(--accent, #FF4500);
}
.page-about__card p {
  color: var(--about-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

/* ===== 服务范围区 ===== */
.page-about__services {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 60px 20px;
  border-top: 1px solid rgba(0, 191, 255, 0.1);
}
.page-about__services-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: center;
}
.page-about__services-text {
  flex: 1 1 50%;
}
.page-about__services-text .section__title {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 16px;
  color: var(--about-text-light);
}
.page-about__services-text p {
  color: var(--about-text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 20px;
}
.page-about__services-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.page-about__services-list li {
  position: relative;
  padding-left: 28px;
  color: var(--about-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
}
.page-about__services-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent, #FF4500);
  font-weight: 700;
}
.page-about__services-image {
  flex: 1 1 45%;
  width: 100%;
}
.page-about__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: var(--about-radius);
  border: 1px solid var(--about-border);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  object-fit: cover;
}
.page-about__img:hover {
  border-color: var(--accent, #FF4500);
  box-shadow: var(--about-glow-hover);
}

/* ===== 技术特色区 ===== */
.page-about__tech {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 60px 20px;
  border-top: 1px solid rgba(0, 191, 255, 0.1);
}
.page-about__tech-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: center;
}
.page-about__tech-image {
  flex: 1 1 45%;
  width: 100%;
}
.page-about__tech-text {
  flex: 1 1 50%;
}
.page-about__tech-text .section__title {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 16px;
  color: var(--about-text-light);
}
.page-about__tech-text p {
  color: var(--about-text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 16px;
}
.page-about__tech-text .btn--accent {
  background-color: var(--accent, #FF4500);
  color: #fff;
  padding: 12px 32px;
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid var(--accent, #FF4500);
  text-decoration: none;
  display: inline-block;
  transition: all var(--about-transition);
}
.page-about__tech-text .btn--accent:hover,
.page-about__tech-text .btn--accent:focus-visible {
  background-color: var(--primary, #00BFFF);
  border-color: var(--primary, #00BFFF);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 191, 255, 0.3);
}

/* ===== 承诺区 ===== */
.page-about__trust {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 60px 20px;
  border-top: 1px solid rgba(0, 191, 255, 0.1);
  text-align: center;
}
.page-about__trust-content .section__title {
  font-family: var(--font-heading, 'Roboto Condensed', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 12px;
  color: var(--about-text-light);
}
.page-about__trust-note {
  color: var(--about-text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 24px;
  line-height: 1.7;
}
.page-about__trust-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 0.95rem;
  color: var(--primary, #00BFFF);
}
.page-about__trust-email,
.page-about__trust-phone {
  transition: color 0.3s ease;
}
.page-about__trust-email:hover,
.page-about__trust-phone:hover {
  color: var(--accent, #FF4500);
}
.page-about__trust-visual {
  max-width: 600px;
  margin: 0 auto;
}
.page-about__img--trust {
  border-radius: var(--about-radius);
  border: 1px solid var(--about-border);
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-about__hero {
    flex-direction: row;
    gap: 48px;
    padding: 48px 24px 64px;
  }
  .page-about__hero-text h1 {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
  }
  .page-about__hero-visual {
    min-height: 320px;
  }
  .page-about__hero-svg {
    max-width: 440px;
  }
  .page-about__cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  .page-about__services-inner {
    flex-direction: row;
    gap: 48px;
  }
  .page-about__tech-inner {
    flex-direction: row;
    gap: 48px;
  }
  .page-about__trust-info {
    flex-direction: row;
    justify-content: center;
    gap: 32px;
  }
}

/* ===== 大桌面端（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-about__hero {
    padding: 56px 32px 80px;
    gap: 64px;
  }
  .page-about__hero-text h1 {
    font-size: 4.5rem;
  }
  .page-about__hero-svg {
    max-width: 480px;
  }
  .page-about__cards {
    gap: 32px;
  }
  .page-about__card {
    padding: 36px 32px;
  }
  .page-about__services,
  .page-about__tech,
  .page-about__trust {
    padding: 80px 32px;
  }
}

/* ===== 交互焦点样式 ===== */
.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--accent, #FF4500);
  outline-offset: 3px;
}

/* ===== 打印样式 ===== */
@media print {
  .page-about {
    background: #fff;
    color: #222;
  }
  .page-about__hero::before,
  .page-about__hero-text h1::after {
    background: #ccc;
  }
  .page-about__card {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}