/* ============================================================
   关于我们页样式 about.css(忠实还原原版设计 + 移动端)
   ============================================================ */
.part-common-title { font-size: 36px; font-weight: bold; height: 49px; text-align: center; letter-spacing: normal; line-height: 49px; color: #262626; margin-bottom: 12px; position: relative; z-index: 2; }
.part-common-subtitle { font-size: 20px; position: relative; z-index: 2; font-weight: normal; line-height: 27px; height: 27px; text-align: center; letter-spacing: normal; color: #595959; }

/* ---------- part-1 首屏 ---------- */
.part-1 { height: 512px; width: 100%; box-sizing: border-box; padding: 118px 0 67px; background: #f6faff; position: relative; }
.part-1::after { width: 100%; content: ' '; max-width: 1920px; margin: 0 auto; z-index: 1; left: 50%; position: absolute; top: 0; height: 512px; transform: translateX(-50%); background: #f6faff url(../assets/images/about/p-1-bg.png) no-repeat center right/cover; }
.part-1-info { width: 896px; box-sizing: border-box; margin: 0 auto; z-index: 3; position: relative; }
.part-1-info h1 { height: 49px; line-height: 49px; margin-bottom: 12px; padding-left: 32px; font-size: 36px; font-weight: bold; background: linear-gradient(90deg, #19b6ff, #007aff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.part-1-box { border-radius: 8px; background: rgba(255, 255, 255, 0.5); box-sizing: border-box; border: 1px solid #fff; backdrop-filter: blur(112px); overflow: hidden; width: 896px; height: 266px; padding: 32px; display: flex; }
.part-1-pic { width: 379px; height: 205px; border-radius: 4px; overflow: hidden; margin-right: 16px; flex-shrink: 0; flex-grow: 0; cursor: pointer; }
.part-1-pic img { width: 100%; height: 100%; }
.part-1-text { font-size: 14px; color: #262626; }
.part-1-text p { line-height: 20px; margin-bottom: 8px; }

/* ---------- part-2 爱达文化 ---------- */
.part-2 { box-sizing: border-box; padding: 80px 0 68px; text-align: center; }
.part-2-box { width: 1180px; box-sizing: border-box; margin: 46px auto 0; display: flex; }
.part-2-pic { width: 480px; height: 320px; margin-right: 20px; }
.part-2-pic img { vertical-align: top; width: 100%; height: 100%; }
.part-2-info { width: 680px; height: 320px; border-radius: 8px; background: #f8f9fb; display: flex; flex-wrap: wrap; }
.part-2-info-item { width: 50%; flex-shrink: 0; flex-grow: 0; padding-top: 70px; box-sizing: border-box; }
.part-2-info-title { font-size: 16px; font-weight: bold; line-height: 22px; color: #262626; margin-bottom: 2px; }
.part-2-info-label { font-size: 14px; line-height: 19px; text-align: center; color: #595959; }
.part-2-info-label span { margin: 0 8px; }
.part-2-info-item-1 { background: url(../assets/images/about/p-2-1-bg.png) no-repeat center 10px/90px; }
.part-2-info-item-2 { background: url(../assets/images/about/p-2-2-bg.png) no-repeat center 10px/90px; }
.part-2-info-item-3 { background: url(../assets/images/about/p-2-3-bg.png) no-repeat center 8px/90px; }
.part-2-info-item-4 { background: url(../assets/images/about/p-2-4-bg.png) no-repeat center 10px/90px; }
.part-2-info-item-3, .part-2-info-item-4 { margin-top: -40px; }

/* ---------- part-3 发展历程(时间轴) ---------- */
.part-3 { padding: 12px 0 91px; box-sizing: border-box; }
.time-line-box { width: 1005px; box-sizing: border-box; margin: 42px auto 0; position: relative; }
.time-box { width: 1000px; height: 87px; margin: 0 auto 8px; overflow: hidden; position: relative; }
.time-box::after { position: absolute; z-index: -1; content: ' '; width: 100%; height: 0; bottom: 26px; left: 0; border-top: 1px dashed #bfbfbf; }
.time-box-list { display: flex; width: fit-content; box-sizing: border-box; transition: all 0.5s ease; }
.time-text-box { width: 1005px; height: 108px; font-size: 14px; margin: 0 auto; color: #3d3d3d; text-align: center; border-radius: 8px; background: #f8f9fb; line-height: 20px; box-sizing: border-box; position: relative; }
.time-text-box-text { padding: 24px 32px; box-sizing: border-box; position: absolute; left: 0; right: 0; top: 0; bottom: 0; opacity: 0; transition: all 0.3s ease; }
.time-text-box-text-cur { opacity: 1; }
.time-box-item { margin: 55px 44px 0; width: 12px; height: 12px; box-sizing: border-box; border-radius: 50%; background: #fff; border: 1px solid #595959; flex-shrink: 0; flex-grow: 0; position: relative; z-index: 4; cursor: pointer; }
.year { position: absolute; top: -33px; font-size: 16px; height: 22px; line-height: 22px; color: #262626; left: 50%; transform: translateX(-50%); white-space: nowrap; }
.time-box-item-cur { width: 12px; height: 12px; background: #007aff; border: 2px solid #fff; border-radius: 50%; box-sizing: border-box; }
.time-box-item-cur .year { font-size: 24px; font-weight: bold; line-height: 26px; height: 26px; top: -35px; color: #007aff; }
.ctrl-btn { width: 39px; height: 39px; border-radius: 50%; position: absolute; cursor: pointer; top: 24px; background: url(../assets/images/about/arrow.png) no-repeat center/39px; }
.ctrl-btn-l { left: -62px; transform: rotate(-180deg); }
.ctrl-btn-r { right: -62px; }

/* ---------- part-4 荣誉资质 ---------- */
.part-4 { background: #f8f9fb; box-sizing: border-box; padding: 44px 0 64px; }
.part-4-btns { width: 500px; height: 60px; display: flex; margin: 30px auto 12px; box-sizing: border-box; justify-content: space-between; padding: 8px 20px; }
.part-4-btn { width: 145px; height: 43px; border-radius: 8px; background: #fff; font-size: 20px; line-height: 43px; letter-spacing: normal; color: #595959; box-sizing: border-box; padding-left: 50px; cursor: pointer; transition: all 0.3s ease; }
.part-4-btn-cur { color: #fff; font-weight: bold; }
.part-4-btn-1 { background: #fff url(../assets/images/about/h-1-1.png) no-repeat 16px 8px/26px; }
.part-4-btn-2 { background: #fff url(../assets/images/about/h-2-1.png) no-repeat 16px 8px/26px; }
.part-4-btn-3 { background: #fff url(../assets/images/about/h-3-1.png) no-repeat 16px 8px/26px; }
.part-4-btn-1.part-4-btn-cur { background: #007aff url(../assets/images/about/h-1-2.png) no-repeat 16px 8px/26px; }
.part-4-btn-2.part-4-btn-cur { background: #007aff url(../assets/images/about/h-2-2.png) no-repeat 16px 8px/26px; }
.part-4-btn-3.part-4-btn-cur { background: #007aff url(../assets/images/about/h-3-2.png) no-repeat 16px 8px/26px; }
.part-4-box { width: 941px; height: 470px; margin: 0 auto; border-radius: 8px; background: #fff; position: relative; }
.part-4-box-item { padding: 32px; display: flex; box-sizing: border-box; z-index: 1; position: absolute; left: 0; right: 0; bottom: 0; top: 0; transition: all 0.3s ease; opacity: 0; }
#part-4-box-1::after { position: absolute; content: ' '; background: url(../assets/images/about/h-1-bg.png) no-repeat center/200px; left: 0; bottom: 0; width: 200px; height: 200px; z-index: 0; }
#part-4-box-2::after { position: absolute; content: ' '; background: url(../assets/images/about/h-2-bg.png) no-repeat center/200px; left: 0; bottom: 0; width: 200px; height: 200px; z-index: 0; }
#part-4-box-3::after { position: absolute; content: ' '; background: url(../assets/images/about/h-3-bg.png) no-repeat center/200px; left: 0; bottom: 0; width: 200px; height: 200px; z-index: 0; }
.part-4-box-item-cur { opacity: 1; z-index: 3; }
.part-4-nav { flex-shrink: 0; flex-grow: 0; width: 217px; height: 410px; overflow: hidden; margin-right: 42px; position: relative; z-index: 4; }
.part-4-nav-wrap { height: 410px; width: 237px; overflow-y: auto; }
.part-4-nav li { width: 217px; font-size: 14px; height: 38px; line-height: 38px; margin-bottom: 8px; border-radius: 4px; color: #595959; box-sizing: border-box; padding-left: 17px; cursor: pointer; position: relative; z-index: 4; }
.part-4-nav .curx { color: #007aff; font-weight: bold; border-radius: 4px; background: rgba(0, 122, 255, 0.08); }
.part-4-pic { width: 618px; height: 406px; border-radius: 8px; position: relative; z-index: 1; background: url(../assets/images/about/h-bg.png) no-repeat center/618px 406px; }
.part-4-pic-wrap { width: 433px; height: 295px; overflow: hidden; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); z-index: 1; opacity: 0; transition: opacity 0.3s ease; display: flex; align-items: center; justify-content: center; }
.part-4-pic-wrap.part-4-pic-wrap-cur { opacity: 1; z-index: 2; }
.part-4-pic-wrap img { width: 100%; vertical-align: top; }

/* ---------- part-5 合作伙伴 ---------- */
.part-5 { box-sizing: border-box; padding: 44px 0 200px; z-index: 4; position: relative; }
.part-5-gallery { display: flex; box-sizing: border-box; width: 971px; flex-wrap: wrap; margin: 46px auto 0; justify-content: space-between; }
.part-5-item { display: flex; width: 218px; margin: -8px -12px; }

/* 视频弹窗 */
.j-video-pop { position: fixed; left: 0; top: 0; right: 0; bottom: 0; z-index: 9999; }
.j-video-pop-mask { position: absolute; left: 0; top: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.7); }
.j-video-pop-box { position: relative; width: 80%; max-width: 960px; margin: 10vh auto 0; }
.j-video-pop-box video { width: 100%; border-radius: 12px; background: #000; }
.j-video-close { position: absolute; right: -36px; top: -36px; color: #fff; font-size: 32px; cursor: pointer; width: 36px; height: 36px; text-align: center; line-height: 36px; }

/* ============ 移动端 ============ */
@media screen and (max-width: 767px) {
  body { overflow-x: hidden; }
  .part-common-title { font-size: 24px; line-height: 34px; height: auto; margin-bottom: 8px; }
  .part-common-subtitle { font-size: 14px; line-height: 22px; height: auto; }

  .part-1 { height: auto; padding: 80px 16px 30px; }
  .part-1-info { width: 100%; }
  .part-1-info h1 { font-size: 26px; line-height: 36px; height: auto; padding-left: 0; text-align: center; }
  .part-1-box { width: 100%; height: auto; padding: 16px; flex-direction: column; }
  .part-1-pic { width: 100%; height: auto; margin: 0 0 12px; }
  .part-1-pic img { height: auto; aspect-ratio: 379 / 205; object-fit: cover; }

  .part-2 { padding: 40px 16px 50px; }
  .part-2-box { width: 100%; margin: 24px 0 0; flex-direction: column; }
  .part-2-pic { width: 100%; height: auto; margin: 0 0 16px; }
  .part-2-pic img { height: auto; }
  .part-2-info { width: 100%; height: auto; }
  .part-2-info-item { width: 50%; padding-top: 64px; padding-bottom: 16px; }
  .part-2-info-item-3, .part-2-info-item-4 { margin-top: 0; }

  .part-3 { padding: 12px 0 50px; }
  .time-line-box { width: 100%; margin: 32px auto 0; }
  .time-box { width: 100%; }
  .time-box::after { bottom: 26px; }
  .time-text-box { width: 100%; height: auto; min-height: 108px; }
  .time-text-box-text { padding: 16px; font-size: 13px; line-height: 20px; }
  .ctrl-btn { width: 32px; height: 32px; background-size: 32px; top: 28px; z-index: 5; }
  .ctrl-btn-l { left: 0; }
  .ctrl-btn-r { right: 0; }

  .part-4 { padding: 32px 16px 40px; }
  .part-4-btns { width: 100%; height: auto; margin: 20px auto 12px; padding: 0; }
  .part-4-btn { width: 30%; height: 40px; line-height: 40px; font-size: 15px; padding-left: 34px; background-size: 22px !important; background-position: 6px 9px !important; }
  .part-4-box { width: 100%; height: auto; min-height: 0; }
  .part-4-box-item { position: static; display: none; padding: 16px; flex-direction: column; }
  .part-4-box-item.part-4-box-item-cur { display: flex; }
  .part-4-nav { width: 100%; height: auto; margin: 0 0 16px; }
  .part-4-nav-wrap { height: auto; width: 100%; }
  .part-4-nav ul { display: flex; flex-direction: column; gap: 8px; width: 100%; }
  .part-4-nav li { width: 100%; margin: 0; height: auto; min-height: 38px; line-height: 20px; padding: 9px 12px; white-space: normal; box-sizing: border-box; }
  .part-4-pic { width: 100%; height: auto; min-height: 220px; background-size: contain; }
  .part-4-pic-wrap { position: static; display: none; width: 100%; height: auto; left: auto; top: auto; transform: none; padding: 8px 0; }
  .part-4-pic-wrap.part-4-pic-wrap-cur { display: flex; }
  .part-4-pic-wrap img { width: auto; max-width: 100%; max-height: 320px; }
  #part-4-box-1::after, #part-4-box-2::after, #part-4-box-3::after { display: none; }

  .part-5 { padding: 0 16px 60px; }
  .part-5-gallery { width: 100%; margin: 24px 0 0; }
  .part-5-item { width: 46%; margin: 0 0 10px; }

  .j-video-pop-box { width: 94%; margin-top: 20vh; }
  .j-video-close { right: 0; top: -40px; }
}