/* ═══════════════════════════════════════════════════════════════
   syz-about.css
   SYZ Rod Ends — About Us 页面独有样式
   适用页面：About Us 公司介绍页
   依赖：style.css, szr-components.css
   类前缀：ab-*
   ═══════════════════════════════════════════════════════════════ */

@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.ab-hero {
      background: var(--slate);
      padding: 72px 0 64px;
      position: relative;
      overflow: hidden;
    }

.ab-hero::before {
      content: '';
      position: absolute; inset: 0;
      background: repeating-linear-gradient(-45deg, transparent, transparent 24px, rgba(255,255,255,.018) 24px, rgba(255,255,255,.018) 25px);
      pointer-events: none;
    }

.ab-hero__inner  { position: relative; z-index: 1; }

.ab-hero__badge  {
      display: inline-block;
      background: var(--red);
      color: var(--white);
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 12px;
      letter-spacing: .1em;
      text-transform: uppercase;
      padding: 4px 10px;
      border-radius: 3px;
      margin-bottom: 16px;
    }

.ab-hero__h1 {
      font-family: var(--f-head);
      font-weight: 800;
      font-size: clamp(40px, 5.5vw, 72px);
      line-height: 1;
      text-transform: uppercase;
      color: var(--white);
      margin-bottom: 18px;
    }

.ab-hero__sub {
      font-size: 16px;
      line-height: 1.65;
      color: rgba(255,255,255,.62);
      max-width: 620px;
    }

.ab-hdr        { margin-bottom: 48px; }

.ab-hdr--center { text-align: center; }

.ab-hdr--center .szr-rule { margin: 12px auto 0; }

.ab-hdr .szr-section-title { margin: 10px 0 12px; }

.ab-intro__grid {
      display: grid;
      grid-template-columns: 1fr 460px;
      gap: 72px;
      align-items: start;
    }

.ab-intro__slogan { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 28px; }

.ab-intro__pill {
      background: var(--steel-lt);
      color: var(--steel);
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 12px;
      letter-spacing: .06em;
      text-transform: uppercase;
      padding: 5px 12px;
      border-radius: 3px;
    }

.ab-intro__body { font-size: 15px; line-height: 1.75; color: var(--mid); margin-bottom: 18px; }

.ab-intro__certs { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

.ab-intro__cert {
      display: flex; align-items: center; gap: 8px;
      background: var(--bg-alt);
      border: 1px solid var(--line);
      border-radius: var(--r);
      padding: 8px 14px;
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 13px;
      letter-spacing: .04em;
      color: var(--ink);
    }

.ab-intro__cert-icon { font-size: 15px; }

.ab-intro__video {
      border-radius: var(--r);
      overflow: hidden;
      aspect-ratio: 16/9;
      background: var(--slate);
    }

.ab-intro__video iframe { width: 100%; height: 100%; border: none; display: block; }

.ab-stats-strip { background: var(--bg-alt); padding: 0; }

.ab-stats__row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
      border-radius: var(--r);
      overflow: hidden;
    }

.ab-stats__item { background: var(--white); padding: 36px 28px; text-align: center; }

.ab-stats__num {
      font-family: var(--f-head);
      font-weight: 800;
      font-size: clamp(44px, 5vw, 64px);
      line-height: 1;
      color: var(--slate);
    }

.ab-stats__num span { color: var(--red); }

.ab-stats__label {
      font-family: var(--f-head);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: .08em;
      text-transform: uppercase;
      color: var(--mid);
      margin-top: 6px;
    }

.ab-commit__grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

.ab-commit__card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--r);
      padding: 32px 28px;
      transition: box-shadow .25s var(--ease), transform .25s var(--ease);
    }

.ab-commit__card:hover { box-shadow: 0 8px 32px rgba(28,43,58,.1); transform: translateY(-3px); }

.ab-commit__icon  { font-size: 28px; margin-bottom: 16px; }

.ab-commit__title {
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 18px;
      text-transform: uppercase;
      color: var(--slate);
      letter-spacing: .03em;
      margin-bottom: 10px;
    }

.ab-commit__body { font-size: 14px; line-height: 1.65; color: var(--mid); }

.ab-timeline__hdr { text-align: center; margin-bottom: 72px; }

.ab-timeline__list {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }

.ab-timeline__list::before {
      content: '';
      position: absolute; left: 50%; top: 0; bottom: 0;
      width: 2px;
      background: rgba(255,255,255,.14);
      transform: translateX(-50%);
    }

.ab-timeline__item {
      display: grid;
      grid-template-columns: 1fr 60px 1fr;
      align-items: start;
      gap: 0 24px;
      margin-bottom: 52px;
    }

.ab-timeline__item:nth-child(odd) .ab-tl-content { grid-column: 1; text-align: right; }

.ab-timeline__item:nth-child(odd) .ab-tl-mid     { grid-column: 2; }

.ab-timeline__item:nth-child(odd) .ab-tl-empty   { grid-column: 3; }

.ab-timeline__item:nth-child(even) .ab-tl-empty   { grid-column: 1; }

.ab-timeline__item:nth-child(even) .ab-tl-mid     { grid-column: 2; }

.ab-timeline__item:nth-child(even) .ab-tl-content { grid-column: 3; text-align: left; }

.ab-tl-mid { display: flex; flex-direction: column; align-items: center; gap: 8px; }

.ab-tl-badge {
      background: var(--red);
      color: var(--white);
      font-family: var(--f-head);
      font-weight: 800;
      font-size: 14px;
      letter-spacing: .04em;
      padding: 5px 12px;
      border-radius: 3px;
      white-space: nowrap;
      z-index: 1;
    }

.ab-tl-dot {
      width: 12px; height: 12px;
      background: rgba(255,255,255,.25);
      border: 2px solid rgba(255,255,255,.5);
      border-radius: 50%;
    }

.ab-tl-title {
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 17px;
      text-transform: uppercase;
      letter-spacing: .03em;
      color: var(--white);
      margin-bottom: 8px;
    }

.ab-tl-desc { font-size: 13.5px; line-height: 1.65; color: rgba(255,255,255,.6); }

.ab-team__grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

.ab-team__card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--r);
      overflow: hidden;
    }

.ab-team__avatar {
      height: 112px;
      background: linear-gradient(135deg, var(--slate-mid), var(--slate));
      display: flex; align-items: center; justify-content: center;
    }

.ab-team__avatar-icon {
      width: 52px; height: 52px;
      background: rgba(255,255,255,.1);
      border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      font-size: 22px;
    }

.ab-team__body { padding: 20px 20px 24px; }

.ab-team__role {
      font-family: var(--f-head);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .1em;
      text-transform: uppercase;
      color: var(--steel);
      margin-bottom: 4px;
    }

.ab-team__name {
      font-family: var(--f-head);
      font-weight: 700;
      font-size: 17px;
      text-transform: uppercase;
      color: var(--slate);
      margin-bottom: 12px;
    }

.ab-team__quote { font-size: 13.5px; line-height: 1.65; color: var(--mid); font-style: italic; }

.ab-team__quote::before { content: '"'; }

.ab-team__quote::after  { content: '"'; }

.ab-cta { background: var(--slate); padding: 80px 0; }

.ab-cta__inner { text-align: center; }

.ab-cta__h2 {
      font-family: var(--f-head);
      font-weight: 800;
      font-size: clamp(32px, 4vw, 52px);
      line-height: 1;
      text-transform: uppercase;
      color: var(--white);
      margin: 12px 0 16px;
    }

.ab-cta__sub  { font-size: 15px; color: rgba(255,255,255,.62); margin-bottom: 32px; }

.ab-cta__btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 1100px) {
      .ab-intro__grid { grid-template-columns: 1fr; gap: 48px; }
      .ab-intro__video { max-width: 600px; }
      .ab-stats__row { grid-template-columns: repeat(2, 1fr); }
      .ab-commit__grid { grid-template-columns: repeat(2, 1fr); }
      .ab-team__grid { grid-template-columns: repeat(2, 1fr); }
    }

@media (max-width: 768px) {
      :root { --pad-x: 20px; }
      .szr-section { padding: 56px 0; }
      .ab-hero { padding: 52px 0 48px; }
      .ab-stats__row { grid-template-columns: repeat(2, 1fr); }
      .ab-commit__grid { grid-template-columns: 1fr; }
      .ab-team__grid   { grid-template-columns: 1fr; }
      /* Timeline: left-aligned single column */
      .ab-timeline__list::before { left: 24px; transform: none; }
      .ab-timeline__item { grid-template-columns: 60px 1fr; gap: 0 14px; }
      .ab-timeline__item:nth-child(odd) .ab-tl-content,
      .ab-timeline__item:nth-child(even) .ab-tl-content { grid-column: 2; text-align: left; }
      .ab-timeline__item:nth-child(odd) .ab-tl-mid,
      .ab-timeline__item:nth-child(even) .ab-tl-mid { grid-column: 1; }
      .ab-tl-empty { display: none !important; }
    }

/* ═══════════════════════════════════════════════════════════════
   Testimonials Marquee  —  szr-testimonials*
   Used in: About SYZ  |  "What Our Partners Say" section
   ═══════════════════════════════════════════════════════════════ */

.szr-testimonials {
  background: var(--bg-alt);
  padding-top: 72px;
  overflow: hidden;
}

.szr-testimonials .szr-section-title {
  text-align: center;
  margin-bottom: 48px;
}

.szr-testimonials__track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee 32s linear infinite;
  padding-bottom: 8px;
}

.szr-testimonials:hover .szr-testimonials__track {
  animation-play-state: paused;
}

.szr-testimonials__card {
  width: 300px;
  flex-shrink: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--steel);
  border-radius: var(--r);
  padding: 28px 24px;
  box-shadow: 0 2px 12px rgba(28,43,58,.05);
  transition: box-shadow .2s, transform .2s var(--ease);
}

.szr-testimonials__card:hover {
  box-shadow: 0 6px 24px rgba(28,43,58,.1);
  transform: translateY(-2px);
}

.szr-testimonials__stars {
  color: #f5a623;
  font-size: 1rem;
  letter-spacing: .08em;
  margin-bottom: 14px;
}

.szr-testimonials__quote {
  font-size: .875rem;
  color: var(--mid);
  line-height: 1.7;
  margin-bottom: 18px;
  font-style: italic;
}

.szr-testimonials__name {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: .95rem;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 2px;
}

.szr-testimonials__loc {
  font-size: .75rem;
  color: var(--steel);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .szr-testimonials__card { width: 260px; padding: 22px 18px; }
  .szr-testimonials__track { gap: 16px; }
}