/***********************************
 * 关于我们 页面专用样式（Spacing System 版）
 * 1. 全局布局
 * 2. Hero / 我们是谁
 * 3. 团队 & 成员
 * 4. 我们的故事 / 时间线
 * 5. 技术栈 & 能力边界
 * 6. 合作原则
 * 7. 资质 / 背书
 * 8. 团队文化 & 工作方式
 * 9. 对客户的承诺 / CTA
 * 10. 响应式
 ***********************************/

/* ========== 1. 全局布局 ========== */

.about-hero,
.about-team,
.about-story,
.about-tech,
.about-principles,
.about-cred,
.about-culture,
.about-promise {
  /* 保证各块之间有统一的垂直节奏 */
  padding-block: var(--space-3xl);
}

.about-hero {
  padding-top: var(--space-4xl); /* 顶部再拉开一点 */
}

/* 让段落行距统一一点 */
.about-section-sub {
  line-height: var(--lh-loose);
  margin: 0;
}

/* 左对齐版 section-header */
.section-header--left {
  text-align: left;
  align-items: flex-start;
}

/* ========== 2. Hero / 我们是谁 ========== */

.about-hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(
      120% 160% at 0% 0%,
      rgba(126, 231, 142, 0.14),
      transparent 60%
    ),
    radial-gradient(
      120% 160% at 100% 0%,
      rgba(80, 150, 255, 0.1),
      transparent 60%
    ),
    #050505;
}

/* 背景细网格感（类似 Scale） */
.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.03) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.25;
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: center;
  z-index: 1;
}

.about-hero-left h1 {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: 32px;
}

.about-hero-sub {
  margin: 0;
  max-width: 540px;
  line-height: var(--lh-loose);
  color: var(--muted);
}

/* 小标签 / Eyebrow */
.about-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
}

.about-hero-meta {
  margin-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.about-hero-pill {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: radial-gradient(
      100% 180% at 0 0,
      rgba(126, 231, 142, 0.25),
      transparent 50%
    ),
    rgba(0, 0, 0, 0.6);
  font-size: 16px;
  color: var(--muted);
}

.about-hero-pill span {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
}

.about-hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  text-decoration: none;
  border: 1px solid transparent;
  background: linear-gradient(135deg, #2dd881, #7cf3c5);
  color: #050505;
  font-weight: 500;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.7);
  transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}

.about-hero-cta:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.85);
}

/* 右侧小卡片组 */
.about-hero-right {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.hero-stat-card {
  padding: var(--space-md);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: radial-gradient(
      160% 160% at 100% 0%,
      rgba(126, 231, 142, 0.12),
      transparent 60%
    ),
    rgba(5, 5, 5, 0.95);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.8);
}

.hero-stat-label {
  margin: 0 0 4px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.hero-stat-number {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 600;
}

.hero-stat-note {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
  line-height: var(--lh-normal);
}

/* ========== 3. 团队 & 成员 ========== */

.about-team {
  margin-top: var(--space-2xl);
}

.about-team-grid {
  margin-top: var(--space-xl);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.about-member {
  position: relative;
  padding: var(--space-lg);
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: radial-gradient(
      160% 160% at 0% 0%,
      rgba(126, 231, 142, 0.12),
      transparent 60%
    ),
    #090909;
}

.about-member::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    120% 140% at 100% 0%,
    rgba(126, 231, 142, 0.18),
    transparent 55%
  );
  opacity: 0;
  transition: opacity 0.18s ease;
  pointer-events: none;
}

.about-member:hover::before {
  opacity: 1;
}

.about-member-header {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: var(--space-sm);
}

.about-member-header h3 {
  margin: 0;
}

.about-member-role {
  font-size: 18px;
  color: var(--muted);
}

.about-member-bio {
  margin: 0 0 var(--space-sm);
  font-size: 18px;
  line-height: var(--lh-loose);
  color: var(--muted);
}

.about-member-tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
}

.about-member-tags li {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.7);
}

/* ========== 4. 我们的故事 / 时间线 ========== */

.about-story {
  background: radial-gradient(
      120% 140% at 10% 0%,
      rgba(126, 231, 142, 0.08),
      transparent 60%
    ),
    #050505;
  border-block: 1px solid rgba(255, 255, 255, 0.04);
}

.about-story-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-2xl);
  align-items: flex-start;
}

.about-story-header h2 {
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.about-timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 10px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.18),
    rgba(255, 255, 255, 0.04)
  );
}

.about-timeline li {
  position: relative;
  padding-left: 32px;
  margin-bottom: var(--space-xl);
}

.about-timeline li:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 5px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #2dd881;
  box-shadow: 0 0 0 6px rgba(45, 216, 129, 0.15);
}

.timeline-content h3 {
  margin: 0 0 var(--space-xs);
  font-size: 18px;
}

.timeline-content p {
  margin: 0;
  font-size: 18px;
  line-height: var(--lh-loose);
  color: var(--muted);
}

/* ========== 5. 技术栈 & 能力边界 ========== */

.about-tech {
  margin-top: var(--space-2xl);
}

.about-tech-stacks-image {
  display: block;
  width: min(960px, 100%);
  height: auto;
  max-height: 420px; /* 你可按实际调 300~420 */
  object-fit: contain; /* 不裁剪，完整显示 */
  margin: var(--space-md) auto var(--space-xl);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.35);
}

.about-tech-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: var(--space-lg);
  align-items: flex-start;
  margin-top: var(--space-xl);
}

/* 左侧：技术栈 chips 卡片 */
.about-tech-stacks {
  padding: var(--space-lg);
  border-radius: 20px;
  border: 1px solid var(--border);
  background: radial-gradient(
      160% 160% at 100% 0%,
      rgba(126, 231, 142, 0.12),
      transparent 60%
    ),
    #090909;
}

.about-tech-stacks h3 {
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.about-tech-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-xs);
}

.about-tech-chips span {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.75);
  font-size: 18px;
  color: var(--muted);
}

/* 右侧：擅长 / 不做，两列卡片 */
.about-tech-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
}

.about-tech-card {
  padding: var(--space-lg);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: linear-gradient(
    135deg,
    rgba(17, 17, 17, 0.95),
    rgba(5, 5, 5, 0.98)
  );
}

.about-tech-card--muted {
  background: radial-gradient(
      140% 150% at 0% 0%,
      rgba(255, 86, 120, 0.16),
      transparent 55%
    ),
    #070707;
}

.about-tech-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.about-tech-card ul {
  margin: 0;
  padding-left: 20px;
  font-size: 18px;
  line-height: var(--lh-loose);
}

.about-tech-card li + li {
  margin-top: var(--space-xs);
}

/* ========== 6. 合作原则 ========== */

.about-principles {
  background: radial-gradient(
      120% 160% at 50% 0%,
      rgba(126, 231, 142, 0.08),
      transparent 60%
    ),
    #050505;
  border-block: 1px solid rgba(255, 255, 255, 0.04);
}

.about-principles-header {
  max-width: 720px;
  margin: 0 auto var(--space-xl);
  text-align: center;
}

.about-principles-header h2 {
  margin-bottom: var(--space-xs);
}

.about-principles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.principle-card {
  position: relative;
  padding: var(--space-lg);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: radial-gradient(
      160% 160% at 0% 0%,
      rgba(126, 231, 142, 0.18),
      transparent 60%
    ),
    rgba(7, 7, 7, 0.98);
  overflow: hidden;
}

.principle-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.principle-card p {
  margin: 0;
  font-size: 14px;
  line-height: var(--lh-loose);
  color: var(--muted);
}

.principle-index {
  position: absolute;
  top: 10px;
  right: 16px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

/* ========== 7. 资质 / 背书 ========== */

.about-cred {
  margin-top: var(--space-2xl);
}

.about-cred-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: flex-start;
  margin-top: var(--space-xl);
}

/* 左侧两个 card 竖排 */
.about-cred-card {
  margin-bottom: var(--space-md);
  padding: var(--space-lg);
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(
    145deg,
    rgba(17, 17, 17, 0.96),
    rgba(6, 6, 6, 0.98)
  );
}

.about-cred-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.about-cred-card ul {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: var(--lh-loose);
}

.about-cred-card li + li {
  margin-top: var(--space-xs);
}

/* 右侧：Logo 占位与说明 */
.about-cred-logos {
  padding: var(--space-lg);
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  background: radial-gradient(
      160% 140% at 100% 0%,
      rgba(126, 231, 142, 0.14),
      transparent 60%
    ),
    #050505;
}

.about-cred-tip {
  margin: 0 0 var(--space-md);
  font-size: 13px;
  line-height: var(--lh-loose);
}

.logo-placeholder-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.logo-placeholder {
  min-width: 120px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 13px;
  text-align: center;
}

/* ========== 8. 团队文化 & 工作方式 ========== */

.about-culture {
  background: #050505;
}

.about-culture-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: flex-start;
}

.about-culture-left h2 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.about-culture-list {
  margin: var(--space-md) 0 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: var(--lh-loose);
}

.about-culture-list li + li {
  margin-top: var(--space-xs);
}

.about-culture-right {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.culture-card {
  padding: var(--space-md);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(
    135deg,
    rgba(16, 16, 16, 0.98),
    rgba(5, 5, 5, 0.98)
  );
}

.culture-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.culture-card p {
  margin: 0;
  font-size: 14px;
  line-height: var(--lh-loose);
  color: var(--muted);
}

/* ========== 9. 对客户的承诺 / CTA ========== */

.about-promise {
  background: radial-gradient(
      140% 160% at 0% 0%,
      rgba(126, 231, 142, 0.15),
      transparent 55%
    ),
    radial-gradient(
      120% 140% at 100% 100%,
      rgba(80, 150, 255, 0.18),
      transparent 60%
    ),
    #050505;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.about-promise-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
}

.about-promise-text h2 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.about-promise-text p {
  margin: 0;
  line-height: var(--lh-loose);
  color: var(--muted);
}

.about-promise-list {
  margin: 0;
  padding-left: 20px;
  font-size: 18px;
  line-height: var(--lh-loose);
}

.about-promise-list li + li {
  margin-top: var(--space-xs);
}

.about-promise-cta {
  margin-top: var(--space-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
  transition: background 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}

.about-promise-cta:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.8);
}

/* ========== 10. 响应式 ========== */

@media (max-width: 1080px) {
  .about-hero-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  }

  .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-story-inner {
    grid-template-columns: 1fr;
  }

  .about-tech-layout {
    grid-template-columns: 1fr;
  }

  .about-principles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-cred-layout {
    grid-template-columns: 1fr;
  }

  .about-culture-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 880px) {
  .about-hero-inner {
    grid-template-columns: 1fr;
  }

  .about-hero-right {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .about-hero,
  .about-team,
  .about-story,
  .about-tech,
  .about-principles,
  .about-cred,
  .about-culture,
  .about-promise {
    padding-block: var(--space-2xl);
  }

  .about-hero {
    padding-top: var(--space-3xl);
  }

  .about-team-grid {
    grid-template-columns: 1fr;
  }

  .about-hero-left h1 {
    font-size: 24px;
  }

  .about-principles-grid {
    grid-template-columns: 1fr;
  }

  .about-hero-right {
    grid-template-columns: 1fr;
  }

  .logo-placeholder-row {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 700px) {
  .about-tech-stacks-image {
    margin: var(--space-sm) auto var(--space-lg);
    border-radius: 14px;
  }
}