/* ============================================
   About 页面 - 全新设计
   ============================================ */

/* ---- 整体 ---- */
#about {
  background: linear-gradient(180deg, #020617 0%, #0F172A 50%, #020617 100%);
  min-height: 100vh;
}

/* ============================================
   1. Hero Banner
   ============================================ */
.about-hero {
  position: relative;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 40%, rgba(99, 102, 241, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 60%, rgba(56, 189, 248, 0.14) 0%, transparent 55%),
    linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
  z-index: 0;
}

.about-hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.about-hero-badge {
  display: inline-block;
  padding: 4px 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 20px;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.about-hero h1 {
  font-size: 52px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-hero-desc {
  font-size: 17px;
  color: rgba(203, 213, 225, 0.8);
  margin-bottom: 36px;
}

/* 数据统计横排 */
.about-hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 32px;
}

.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: #38BDF8;
  line-height: 1.1;
}

.stat-unit {
  font-size: 16px;
  font-weight: 500;
  color: #38BDF8;
}

.stat-label {
  font-size: 12px;
  color: rgba(148, 163, 184, 0.7);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: rgba(148, 163, 184, 0.15);
}

/* ============================================
   2. 关于我们 — 左文右卡片
   ============================================ */
.about-intro {
  padding: 90px 0;
}

.about-intro-grid {
  display: flex;
  gap: 60px;
  align-items: stretch;
}

.about-intro-text {
  flex: 1.1;
  min-width: 0;
}

.about-intro-text h2 {
  font-size: 32px;
  font-weight: 700;
  color: #F1F5F9;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.intro-accent {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, #38BDF8, #6366F1);
  border-radius: 2px;
  margin-bottom: 28px;
}

.about-intro-text p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(203, 213, 225, 0.82);
  margin-bottom: 16px;
  text-indent: 2em;
}

/* 右侧 2x2 小卡片 */
.about-intro-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  flex-shrink: 0;
  width: 380px;
}

.intro-card {
  padding: 24px 20px;
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
}

.intro-card:hover {
  border-color: rgba(56, 189, 248, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.intro-card-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 12px;
  color: #38BDF8;
}

.intro-card-icon svg {
  width: 100%;
  height: 100%;
}

.intro-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: #E2E8F0;
  margin-bottom: 6px;
}

.intro-card p {
  font-size: 12px;
  color: rgba(148, 163, 184, 0.7);
  line-height: 1.4;
}

/* ============================================
   3. 核心优势 — 序号 + 标题 + 描述
   ============================================ */
.about-advantages {
  padding: 90px 0;
}

.about-advantages .section-title {
  text-align: center;
  margin-bottom: 56px;
}

.about-advantages .section-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: #F1F5F9;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 15px;
  color: rgba(148, 163, 184, 0.7);
  margin-top: 8px;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.advantage-item {
  padding: 36px 28px;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.08);
  border-radius: 14px;
  transition: all 0.3s ease;
  position: relative;
}

.advantage-item:hover {
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.advantage-num {
  font-size: 36px;
  font-weight: 800;
  color: rgba(56, 189, 248, 0.12);
  line-height: 1;
  margin-bottom: 16px;
  font-family: 'Inter', sans-serif;
}

.advantage-item:hover .advantage-num {
  color: rgba(56, 189, 248, 0.25);
}

.advantage-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: #E2E8F0;
  margin-bottom: 12px;
}

.advantage-item p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(203, 213, 225, 0.7);
}

/* ============================================
   4. 时间轴 — 纯 CSS 竖版
   ============================================ */
.about-timeline {
  padding: 90px 0;
}

.about-timeline .section-title {
  text-align: center;
  margin-bottom: 56px;
}

.about-timeline .section-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: #F1F5F9;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 40px;
}

/* 竖线 */
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, #38BDF8, rgba(99, 102, 241, 0.4), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
  padding-left: 32px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* 圆点 */
.timeline-dot {
  position: absolute;
  left: -40px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #0F172A;
  border: 2px solid #38BDF8;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
  z-index: 1;
}

.timeline-item:hover .timeline-dot {
  background: #38BDF8;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

.timeline-date {
  font-size: 13px;
  font-weight: 600;
  color: #38BDF8;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.timeline-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: #E2E8F0;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(148, 163, 184, 0.75);
}

/* ============================================
   5. 荣誉资质
   ============================================ */
.about-honors {
  padding: 90px 0;
}

.about-honors .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.about-honors .section-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: #F1F5F9;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.honors-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.honor-item {
  flex: 0 1 calc(25% - 15px);
  min-width: 200px;
  max-width: 280px;
  padding: 28px 20px;
  text-align: center;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.08);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.honor-item:hover {
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.honor-item img {
  width: 100%;
  max-width: 180px;
  height: auto;
  border-radius: 6px;
  margin-bottom: 12px;
}

.honor-item p {
  font-size: 13px;
  color: rgba(203, 213, 225, 0.8);
}

/* ============================================
   6. 精选客户案例
   ============================================ */
.about-cases {
  padding: 90px 0;
}

.about-cases .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.about-cases .section-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: #F1F5F9;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cases-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.case-item {
  flex: 0 1 calc(33.333% - 14px);
  min-width: 280px;
  max-width: 400px;
  padding: 32px;
  text-align: center;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.08);
  border-radius: 14px;
  transition: all 0.3s ease;
}

.case-item:hover {
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.case-item img {
  width: 100%;
  max-width: 220px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 16px;
}

.case-item h4 {
  font-size: 17px;
  font-weight: 600;
  color: #38BDF8;
  margin-bottom: 10px;
}

.case-item p {
  font-size: 14px;
  color: rgba(203, 213, 225, 0.75);
  line-height: 1.6;
}

/* ============================================
   7. CTA 联系我们
   ============================================ */
.about-cta {
  padding: 80px 0 100px;
}

.cta-inner {
  text-align: center;
  padding: 60px 40px;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 60%),
    rgba(30, 41, 59, 0.4);
  border: 1px solid rgba(148, 163, 184, 0.08);
  border-radius: 20px;
}

.cta-inner h2 {
  font-size: 30px;
  font-weight: 700;
  color: #F1F5F9;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #F1F5F9 30%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-inner > p {
  font-size: 16px;
  color: rgba(148, 163, 184, 0.7);
  margin-bottom: 28px;
}

.cta-features {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.cta-features span {
  font-size: 14px;
  color: rgba(203, 213, 225, 0.7);
}

.cta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.3);
}

.cta-btn {
  display: inline-block;
  padding: 12px 40px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #38BDF8 0%, #6366F1 100%);
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.25);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(56, 189, 248, 0.4);
}

/* ============================================
   移动端适配
   ============================================ */
@media (max-width: 768px) {

  .about-hero {
    height: 260px;
  }

  .about-hero h1 {
    font-size: 32px;
  }

  .about-hero-desc {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .about-hero-stats {
    flex-wrap: wrap;
    gap: 12px;
  }

  .stat-item {
    padding: 0 16px;
  }

  .stat-num {
    font-size: 22px;
  }

  .stat-divider {
    display: none;
  }

  /* 关于 */
  .about-intro {
    padding: 60px 0;
  }

  .about-intro-grid {
    flex-direction: column;
    gap: 32px;
  }

  .about-intro-visual {
    width: 100%;
  }

  .about-intro-text h2 {
    font-size: 24px;
  }

  /* 优势 */
  .about-advantages {
    padding: 60px 0;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about-advantages .section-title h2 {
    font-size: 24px;
  }

  /* 时间轴 */
  .about-timeline {
    padding: 60px 0;
  }

  .about-timeline .section-title h2 {
    font-size: 24px;
  }

  .timeline {
    padding-left: 32px;
  }

  .timeline-item {
    padding-left: 24px;
  }

  /* 荣誉 */
  .about-honors {
    padding: 60px 0;
  }

  .honor-item {
    flex: 0 1 calc(50% - 10px);
    min-width: 140px;
  }

  .about-honors .section-title h2 {
    font-size: 24px;
  }

  /* 客户案例 */
  .about-cases {
    padding: 60px 0;
  }

  .case-item {
    flex: 0 1 100%;
    min-width: auto;
  }

  .about-cases .section-title h2 {
    font-size: 24px;
  }

  /* CTA */
  .about-cta {
    padding: 40px 0 60px;
  }

  .cta-inner {
    padding: 40px 20px;
  }

  .cta-inner h2 {
    font-size: 22px;
  }

  .cta-features {
    flex-direction: column;
    gap: 8px;
  }

  .cta-dot {
    display: none;
  }
}

@media (max-width: 480px) {
  .about-hero {
    height: 220px;
  }

  .about-hero h1 {
    font-size: 26px;
  }

  .about-intro-visual {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .intro-card {
    padding: 16px 12px;
  }

  .advantage-item {
    padding: 24px 20px;
  }
}