/* ============================================================
   Megatex Blanket — 关于我们页样式
   设计依据：毯子独立站方案.pdf 第7页（关于我们页面 1920×3553）
   区块：Banner / 介绍 / 工厂网格(悬停放大) / 使命 / 证书轮播 / CTA / 深色统计带(扫光)
   ============================================================ */

/* ---------- 通用 ---------- */
.ab-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.ab-sec-title {
  text-align: center; font-size: 30px; letter-spacing: .5px;
  margin-bottom: 40px;
}
.ab-sec-title::after {
  content: ""; display: block; width: 48px; height: 3px;
  background: var(--ink); margin: 14px auto 0;
}

/* ---------- 1. Hero Banner（与 customization 页同款：page-banner 白色样式） ---------- */
.page-banner {
  position: relative;
  min-height: 340px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.page-banner-bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
}
.page-banner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(65,65,65,.30) 0%, rgba(65,65,65,.42) 55%, rgba(65,65,65,.55) 100%);
}
.page-banner-inner {
  position: relative; z-index: 1;
  text-align: center; padding: 88px 24px;
}
.page-banner-title {
  color: #fff;
  font-size: clamp(20px, 3vw, 38px);
  letter-spacing: 2px;
  text-shadow: 0 2px 18px rgba(0,0,0,.25);
}
.page-banner-sub {
  color: rgba(255,255,255,.92);
  font-size: clamp(14px, 1.2vw, 17px);
  max-width: 640px; margin: 18px auto 0;
  text-shadow: 0 1px 10px rgba(0,0,0,.3);
}
.page-banner .crumb { margin-top: 18px; }
.page-banner .crumb ol {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 4px 10px;
  font-size: 14px; color: rgba(255,255,255,.85);
}
.page-banner .crumb li { display: flex; align-items: center; gap: 10px; }
.page-banner .crumb li + li::before { content: "/"; color: rgba(255,255,255,.55); }
.page-banner .crumb a { color: rgba(255,255,255,.9); }
.page-banner .crumb a:hover { color: #fff; text-decoration: underline; }

/* ---------- 1b. Banner（设计稿 y'96-560：织物大图 + 白字两行 + 副文） ---------- */
.ab-banner {
  position: relative;
  min-height: 340px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.ab-banner-bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
}
.ab-banner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(65,65,65,.28) 0%, rgba(65,65,65,.40) 55%, rgba(65,65,65,.55) 100%);
}
.ab-banner-inner {
  position: relative; z-index: 1;
  text-align: center; padding: 88px 24px;
}
.ab-banner-title {
  color: #fff;
  font-size: clamp(23px, 3.6vw, 42px);
  letter-spacing: 1.5px; line-height: 1.22;
  text-shadow: 0 2px 18px rgba(0,0,0,.25);
}
.ab-banner-sub {
  color: rgba(255,255,255,.92);
  font-size: clamp(14px, 1.2vw, 17px);
  max-width: 640px; margin: 20px auto 0;
  text-shadow: 0 1px 10px rgba(0,0,0,.3);
}
.ab-banner .crumb { margin-top: 22px; }
.ab-banner .crumb ol {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 4px 10px; list-style: none;
  font-size: 14px; color: rgba(255,255,255,.85);
}
.ab-banner .crumb li { display: flex; align-items: center; gap: 10px; }
.ab-banner .crumb li + li::before { content: "/"; color: rgba(255,255,255,.55); }
.ab-banner .crumb a { color: rgba(255,255,255,.9); }
.ab-banner .crumb a:hover { color: #fff; text-decoration: underline; }

/* ---------- 2. 介绍区：左图右文（设计稿 y'624-1008） ---------- */
.ab-intro { background: var(--surface); padding: 76px 0 84px; }
.ab-split {
  display: grid;
  grid-template-columns: minmax(0, 560px) minmax(0, 1fr);
  gap: 56px; align-items: center;
}
.ab-intro-img { width: 100%; border-radius: 12px; box-shadow: var(--shadow); }
.ab-intro-text h2 { font-size: 32px; margin-bottom: 20px; letter-spacing: .5px; }
.ab-intro-text p { margin-bottom: 16px; }
.ab-points { margin: 22px 0 28px; }
.ab-points li {
  position: relative; padding-left: 30px; margin-bottom: 10px;
  color: var(--text);
}
.ab-points li::before {
  content: ""; position: absolute; left: 2px; top: 7px;
  width: 14px; height: 8px;
  border-left: 2.5px solid var(--ink); border-bottom: 2.5px solid var(--ink);
  transform: rotate(-45deg);
}
.ab-btn { padding: 13px 34px; }

/* ---------- 3. 工厂网格：3 图悬停放大（设计稿 y'1096-1523） ---------- */
.ab-factory { background: var(--bg); padding: 76px 0 72px; }
.ab-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.ab-grid-item { margin: 0; }
.ab-grid-img {
  display: block; overflow: hidden; border-radius: 12px;
  box-shadow: var(--shadow);
}
.ab-grid-img img {
  width: 100%; aspect-ratio: 363 / 230; object-fit: cover;
  transition: transform .5s ease;
}
/* 核心交互①：鼠标悬停图片放大 */
.ab-grid-item:hover .ab-grid-img img,
.ab-grid-item:focus-within .ab-grid-img img { transform: scale(1.08); }
.ab-grid-item figcaption {
  text-align: center; margin-top: 14px;
  font-weight: 600; color: var(--ink); font-size: 15px;
}
.ab-grid-desc {
  max-width: 920px; margin: 36px auto 0; text-align: center;
  color: var(--muted);
}

/* ---------- 4. 使命（设计稿 y'1597-1696） ---------- */
.ab-mission { background: var(--surface); padding: 64px 0 76px; text-align: center; }
.ab-kicker {
  font-size: 13px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; color: var(--muted); margin-bottom: 16px;
}
.ab-mission-text {
  max-width: 780px; margin: 0 auto;
  font-size: clamp(18px, 1.8vw, 24px); line-height: 1.6;
  color: var(--ink); font-weight: 500;
}

/* ---------- 5. 证书轮播（设计稿 y'1715-2180：米色带 + 双卡并排） ---------- */
.ab-certs { background: #ece7df; padding: 76px 0 84px; scroll-margin-top: 90px; }
.ab-certs-sub {
  text-align: center; color: var(--muted); margin: -26px 0 36px;
}
.cert-carousel { position: relative; }
.cert-viewport {
  overflow: hidden;
  /* 边缘渐隐提示可滚动 */
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
}
.cert-track {
  display: flex; gap: 36px;
  transition: transform .65s cubic-bezier(.4, 0, .2, 1);
  will-change: transform;
}
.cert-card {
  flex: 0 0 calc(50% - 18px);
  margin: 0; padding: 18px 18px 14px;
  background: var(--surface); border-radius: 12px;
  box-shadow: 0 6px 24px rgba(44,42,37,.10);
}
.cert-card img {
  width: 100%; max-height: 400px; object-fit: contain;
  border-radius: 6px; background: #fff;
}
.cert-card figcaption {
  text-align: center; margin-top: 12px;
  font-size: 14px; font-weight: 600; color: var(--ink);
}
.cert-tip {
  text-align: center; margin-top: 22px;
  font-size: 12.5px; color: var(--muted); letter-spacing: .4px;
}

/* ---------- 6. CTA（设计稿 y'2262-2548） ---------- */
.ab-cta { background: var(--surface); padding: 80px 0 88px; text-align: center; }
.ab-cta h2 {
  font-size: clamp(26px, 3vw, 38px); line-height: 1.3;
  letter-spacing: .5px;
}
.ab-cta-sub { color: var(--muted); margin: 18px 0 34px; font-size: 16.5px; }
.ab-cta-actions {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 16px;
}
.ab-btn--outline { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.ab-btn--outline:hover { background: var(--ink); color: #fff; }

/* ---------- 7. 深色统计带：count-up + 悬停变大扫光（设计稿 y'2608-2881） ---------- */
/* 统计带：浅灰底 + 竖分隔线（截图版式） */
.ab-stats { background: var(--bg); padding: 72px 0 64px; }
.ab-stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  text-align: center;
}
.ab-stat { padding: 8px 24px; }
.ab-stat + .ab-stat { border-left: 1px solid var(--line); }
.ab-stat-num {
  color: var(--ink); font-size: clamp(38px, 3.8vw, 52px);
  font-weight: 700; line-height: 1.1; letter-spacing: 1px;
}
.ab-stat-label {
  color: var(--muted); margin-top: 10px;
  font-size: 14px; letter-spacing: .3px;
}
.ab-stats-note {
  text-align: center; margin-top: 44px;
  color: var(--muted); font-size: 14px;
}

/* ---------- 8. About Us 新版式（对齐本地 preview，截图"关于我们.jpg"） ---------- */

/* 2. About Megatex：左文右图 */
.au-about { background: var(--surface); padding: 76px 0 84px; }
.au-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 560px);
  gap: 56px; align-items: center;
}
.au-about-text h2 { font-size: 32px; margin-bottom: 20px; letter-spacing: .5px; }
.au-about-text p { margin-bottom: 1px; line-height: 1.3; }
.au-clients { margin-top: 8px; }
.au-clients-label {
  font-size: 12.5px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.au-clients-list {
  display: flex; flex-wrap: wrap; gap: 10px 20px;
  list-style: none; font-size: 15px; font-weight: 600; color: var(--ink);
}
.au-about-imgs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.au-about-imgs img {
  width: 100%; object-fit: cover;
  border-radius: 1px; box-shadow: var(--shadow);
}

/* 4. Manufacturing & QC Strength：3 卡片 */
.au-strength { background: var(--surface); padding: 76px 0 84px; }
.au-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.au-card {
  background: var(--surface);
  border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; box-shadow: var(--shadow);
}
.au-card-img { display: block; overflow: hidden; }
.au-card-img img {
  width: 100%; aspect-ratio: 3 / 2; object-fit: cover;
  transition: transform .5s ease;
}
.au-card:hover .au-card-img img { transform: scale(1.06); }
.au-card-body { padding: 22px 24px 26px; }
.au-card-body h3 { font-size: 19px; margin-bottom: 10px; }
.au-card-body p { font-size: 14px; color: #555; line-height: 1.7; }

/* 5. Certifications & Factory Audit（图一版式：白底标题区 + 米色大图轮播带） */
.au-certs { background: var(--surface); padding: 76px 0 0; }
.au-cert-lines {
  max-width: 940px; margin: 0 0 64px;
  text-align: left;
}
.au-cert-lines p {
  font-size: 15px; color: #555; line-height: 1.9;
  margin: 0 0 0px;
}
.au-cert-lines p:last-child { margin-bottom: 0; }
.au-cert-lines strong { color: var(--ink); font-weight: 700; }
.au-cert-banner {
  position: relative; overflow: hidden;
  background: #C8BFB5;
  aspect-ratio: 1200 / 465;
}
.au-cert-track {
  display: flex; height: 100%;
  transition: transform .7s ease;
}
.au-cert-slide {
  flex: 0 0 100%; min-width: 100%;
  position: relative; display: block; height: 100%;
}
.au-cert-slide img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.au-cert-dots {
  position: absolute; left: 0; right: 0; bottom: 18px;
  display: flex; justify-content: center; gap: 10px; z-index: 2;
}
.au-cert-dots button {
  width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%;
  background: rgba(255,255,255,.5); cursor: pointer;
  transition: background .3s ease, transform .3s ease;
}
.au-cert-dots button.active { background: #fff; transform: scale(1.25); }

/* 7. 询盘 CTA + 快速表单（与首页同款） */
.inquiry { background: var(--surface); }
.inquiry-title {
  font-size: clamp(22px, 2.2vw, 30px); text-align: center; line-height: 1.5;
}
.inquiry-btn { display: table; margin: 28px auto 40px; }
.inquiry-form {
  display: grid; grid-template-columns: 1fr 1fr 2fr 1fr;
  gap: 18px; align-items: end;
}
.field label {
  display: block; font-size: 13px; font-weight: 600; color: var(--ink);
  margin-bottom: 8px;
}
.field input[type="text"],
.field input[type="email"] {
  width: 100%; height: 46px; padding: 0 16px;
  border: 1.5px solid var(--line); border-radius: var(--radius);
  font: inherit; outline: none; background: #fff;
  transition: border-color .2s;
}
.field input:focus { border-color: var(--ink); }
.captcha-inline { display: flex; gap: 10px; align-items: center; }
.captcha-inline input { flex: 1; min-width: 0; }
.captcha-inline img { border-radius: 6px; cursor: pointer; flex-shrink: 0; height: 44px; }
.form-submit { grid-column: 4; display: flex; justify-content: flex-end; padding-bottom: 2px; }
.form-submit button {
  background: none; border: none; padding: 0;
  color: var(--ink); font-weight: 600; font-size: 14px;
  cursor: pointer; transition: opacity .2s;
  white-space: nowrap;
}
.form-submit button:hover { opacity: .6; }

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .ab-split { grid-template-columns: 1fr; gap: 36px; }
  .ab-intro-text h2 { font-size: 28px; }
  .ab-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 0; }
  .ab-stat:nth-child(3) { border-left: none; }
  .ab-stats-note { margin-top: 36px; }
  .cert-card { flex: 0 0 calc(50% - 18px); }
  .au-split { grid-template-columns: 1fr; gap: 36px; }
  .au-cards { grid-template-columns: 1fr 1fr; }
  .inquiry-form { grid-template-columns: 1fr 1fr; }
  .field-wide { grid-column: 1 / -1; }
  .form-submit { grid-column: 1 / -1; justify-content: flex-end; }
}
@media (max-width: 640px) {
  .ab-banner { min-height: 240px; }
  .ab-banner-inner { padding: 56px 18px; }
  .ab-intro { padding: 56px 0; }
  .ab-factory { padding: 56px 0; }
  .ab-certs { padding: 56px 0 0; }
  .au-cert-lines { margin-bottom: 40px; }
  .ab-cta { padding: 60px 0; }
  .ab-stats { padding: 56px 0 48px; }
  .ab-grid { grid-template-columns: 1fr; gap: 32px; }
  .ab-grid-img img { aspect-ratio: 4 / 3; }
  .cert-card { flex: 0 0 82%; }
  .cert-track { gap: 20px; }
  .ab-cta-actions .ab-btn { width: 100%; max-width: 320px; }
  .au-cards { grid-template-columns: 1fr; }
  .au-about-imgs { grid-template-columns: 1fr; }
  .inquiry-form { grid-template-columns: 1fr; }
}

/* ---------- 减少动效偏好（无障碍） ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .ab-grid-img img { transition: none; }
  .cert-track { transition: none; }
}