/* ============ 品牌故事 页面专属样式 · 作用域 .page-about ============ */

.page-about{
  --about-line:rgba(159,178,184,.26);
  --about-card-shadow:6px 6px 0 rgba(11,26,34,.62);
  background:var(--jy-night);
  color:var(--jy-mist);
  padding-bottom:0;
  overflow-x:hidden;
}

.page-about .page-about__h2{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:clamp(26px,4.4vw,40px);
  line-height:1.2;
  letter-spacing:.01em;
  color:#fff;
  margin:10px 0 14px;
}

.page-about .page-about__section-lede{
  max-width:44em;
  font-size:17px;
  line-height:1.75;
  color:var(--jy-silver);
  margin:0;
}

/* ---------- 面包屑 ---------- */
.page-about .page-about__crumbs{
  max-width:var(--jy-max);
  margin:0 auto;
  padding:16px var(--jy-pad) 0;
  position:relative;
  z-index:2;
}

/* ---------- 首屏 ---------- */
.page-about .page-about__hero{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  padding:clamp(24px,4vw,52px) 0 clamp(40px,6vw,76px);
}

.page-about .page-about__hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(165deg,var(--jy-moss) 0%,rgba(15,43,38,.35) 48%,transparent 78%);
  z-index:0;
}

.page-about .page-about__hero-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(24px,4vw,48px);
  align-items:center;
}

.page-about .page-about__hero-title{
  font-family:var(--jy-font-display);
  font-weight:900;
  font-size:clamp(34px,7.2vw,68px);
  line-height:1.02;
  letter-spacing:-.02em;
  color:#fff;
  margin:12px 0 18px;
  transform:skewY(-1.2deg);
  transform-origin:left bottom;
}

.page-about .page-about__hero-lede{
  font-size:clamp(16px,1.6vw,17.5px);
  line-height:1.78;
  color:var(--jy-mist);
  max-width:36em;
  margin:0;
}

.page-about .page-about__hero-facts{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  margin:28px 0 0;
  padding:18px 0 0;
  border-top:1px solid var(--about-line);
}

.page-about .page-about__hero-facts li{
  flex:1 1 110px;
  min-width:0;
  padding:0 12px 0 0;
  margin-right:12px;
  border-right:1px dashed var(--about-line);
}

.page-about .page-about__hero-facts li:last-child{
  border-right:0;
  margin-right:0;
}

.page-about .page-about__fact-num{
  display:block;
  font-family:var(--jy-font-numeric);
  font-weight:700;
  font-size:clamp(20px,2.6vw,28px);
  letter-spacing:.02em;
  color:var(--jy-cyan);
}

.page-about .page-about__fact-label{
  display:block;
  margin-top:4px;
  font-family:var(--jy-font-utility);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--jy-silver);
}

.page-about .page-about__hero-figure{
  margin:0;
  border:2px solid var(--jy-ink);
  box-shadow:var(--jy-shadow-panel);
  background:var(--jy-moss);
}

.page-about .page-about__hero-figure figcaption{
  padding:10px 14px;
  background:var(--jy-ink);
  color:var(--jy-silver);
  font-size:13px;
  line-height:1.6;
}

/* ---------- 通用图片 ---------- */
.page-about .jy-media img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
}

/* ---------- 起点 ---------- */
.page-about .page-about__origin{
  position:relative;
}

.page-about .page-about__origin-copy p{
  font-size:16.5px;
  line-height:1.78;
  color:var(--jy-mist);
  margin:0 0 14px;
}

.page-about .page-about__origin-copy p:last-child{
  margin-bottom:0;
}

.page-about .page-about__quote{
  align-self:start;
  border:2px solid var(--jy-ink);
  box-shadow:var(--jy-shadow-hard);
}

.page-about .page-about__quote-text{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:clamp(24px,3.4vw,34px);
  line-height:1.4;
  color:var(--jy-ink);
  margin:14px 0 18px;
  padding-left:16px;
  border-left:6px solid var(--jy-red);
}

.page-about .page-about__quote-note{
  font-size:15.5px;
  line-height:1.75;
  margin:0;
  color:#3a322a;
}

/* ---------- 时间轴 ---------- */
.page-about .page-about__track{
  position:relative;
  margin-top:clamp(28px,4.5vw,48px);
}

.page-about .page-about__track::before{
  content:"";
  position:absolute;
  left:calc(var(--jy-pad) + 13px);
  top:10px;
  bottom:14px;
  width:2px;
  background:linear-gradient(180deg,var(--jy-cyan) 0%,rgba(47,227,210,.28) 62%,transparent 100%);
}

.page-about .page-about__era{
  position:relative;
  box-sizing:border-box;
  width:var(--era-w,100%);
  padding-left:44px;
  margin-bottom:clamp(18px,2.6vw,28px);
}

.page-about .page-about__era:last-child{
  margin-bottom:0;
}

.page-about .page-about__era-node{
  position:relative;
  display:flex;
  align-items:center;
  margin:0 0 10px;
  font-family:var(--jy-font-numeric);
  font-size:13px;
  letter-spacing:.07em;
  color:var(--jy-cyan);
}

.page-about .page-about__era-dot{
  position:absolute;
  left:-39px;
  top:50%;
  width:15px;
  height:15px;
  margin-top:-7.5px;
  box-sizing:border-box;
  border:2px solid var(--jy-cyan);
  background:var(--jy-night);
  transform:rotate(45deg);
}

.page-about .page-about__era-body{
  background:var(--jy-moss);
  border:2px solid var(--jy-ink);
  box-shadow:var(--about-card-shadow);
  padding:16px 18px;
  transition:background-color .16s ease,border-color .16s ease,box-shadow .16s ease;
}

.page-about .page-about__era-body[open]{
  background:var(--jy-cream);
  border-color:var(--jy-red);
  box-shadow:var(--jy-shadow-hard);
  color:var(--jy-ink);
}

.page-about .page-about__era-summary{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:14px;
  cursor:pointer;
  list-style:none;
}

.page-about .page-about__era-summary::-webkit-details-marker{
  display:none;
}

.page-about .page-about__era-summary::after{
  content:"＋";
  flex:0 0 auto;
  font-family:var(--jy-font-numeric);
  font-size:17px;
  line-height:1;
  color:var(--jy-orange);
}

.page-about .page-about__era-body[open] .page-about__era-summary::after{
  content:"－";
}

.page-about .page-about__era-title{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:clamp(18px,2.4vw,23px);
  line-height:1.4;
  color:#fff;
  margin:0;
}

.page-about .page-about__era-body[open] .page-about__era-title{
  color:var(--jy-ink);
}

.page-about .page-about__era-body:hover{
  border-color:var(--jy-cyan);
}

.page-about .page-about__era-detail{
  margin-top:14px;
  padding-top:14px;
  border-top:1px dashed currentColor;
  font-size:16px;
  line-height:1.76;
  max-width:70ch;
  color:var(--jy-mist);
}

.page-about .page-about__era-body[open] .page-about__era-detail{
  color:#3a322a;
}

.page-about .page-about__era-detail p{
  margin:0;
}

.page-about .page-about__era-list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:14px 0 0;
  padding:0;
}

.page-about .page-about__era-list li{
  font-family:var(--jy-font-utility);
  font-size:13px;
  letter-spacing:.05em;
  padding:5px 10px;
  border:1px solid currentColor;
  opacity:.78;
}

/* ---------- 团队分工 ---------- */
.page-about .page-about__team-figure{
  margin:clamp(22px,3.4vw,36px) 0 clamp(24px,4vw,40px);
  border:2px solid var(--jy-ink);
  box-shadow:var(--jy-shadow-panel);
}

.page-about .page-about__team-figure figcaption{
  padding:10px 14px;
  background:var(--jy-ink);
  color:var(--jy-silver);
  font-size:13px;
  line-height:1.6;
}

.page-about .page-about__roles{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:16px;
}

.page-about .page-about__role{
  position:relative;
  box-sizing:border-box;
  background:var(--jy-moss);
  border:2px solid var(--jy-ink);
  border-top:3px solid rgba(47,227,210,.6);
  padding:20px;
  box-shadow:var(--about-card-shadow);
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}

.page-about .page-about__role--lead{
  background:linear-gradient(180deg,var(--jy-moss) 0%,var(--jy-night) 100%);
}

.page-about .page-about__role:hover{
  transform:translate(-2px,-2px);
  border-top-color:var(--jy-orange);
  box-shadow:9px 9px 0 rgba(47,227,210,.22);
}

.page-about .page-about__role:hover .page-about__role-out{
  color:var(--jy-cyan);
  border-top-color:rgba(47,227,210,.5);
}

.page-about .page-about__role-name{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:20px;
  line-height:1.35;
  color:#fff;
  margin:0;
}

.page-about .page-about__role-num{
  font-family:var(--jy-font-numeric);
  font-weight:700;
  font-size:clamp(28px,3.6vw,40px);
  letter-spacing:.02em;
  color:var(--jy-orange);
  margin:8px 0 12px;
  line-height:1;
}

.page-about .page-about__role-desc{
  font-size:15.8px;
  line-height:1.75;
  color:var(--jy-mist);
  margin:0;
}

.page-about .page-about__role-out{
  margin:16px 0 0;
  padding-top:12px;
  border-top:1px dashed var(--about-line);
  font-family:var(--jy-font-utility);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--jy-silver);
  transition:color .16s ease,border-color .16s ease;
}

/* ---------- 制作链路 ---------- */
.page-about .page-about__steps{
  list-style:none;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:14px;
  margin:clamp(24px,4vw,38px) 0 0;
  padding:0;
}

.page-about .page-about__step{
  position:relative;
  box-sizing:border-box;
  background:var(--jy-night);
  border:1px solid var(--about-line);
  border-top:3px solid var(--jy-cyan);
  padding:18px;
  transition:border-top-color .16s ease,background-color .16s ease;
}

.page-about .page-about__step:hover{
  background:rgba(15,43,38,.72);
  border-top-color:var(--jy-orange);
}

.page-about .page-about__step-idx{
  display:block;
  font-family:var(--jy-font-numeric);
  font-weight:700;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--jy-orange);
  margin-bottom:8px;
}

.page-about .page-about__step-name{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:19px;
  line-height:1.35;
  color:#fff;
  margin:0 0 6px;
}

.page-about .page-about__step-owner{
  font-family:var(--jy-font-utility);
  font-size:12.5px;
  letter-spacing:.07em;
  color:var(--jy-cyan);
  margin:0 0 10px;
}

.page-about .page-about__step-desc{
  font-size:15.5px;
  line-height:1.72;
  color:var(--jy-mist);
  margin:0;
}

.page-about .page-about__step-out{
  margin:14px 0 0;
  padding-top:10px;
  border-top:1px dashed var(--about-line);
  font-family:var(--jy-font-numeric);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--jy-silver);
}

/* ---------- 质量报告 ---------- */
.page-about .page-about__quality-grid{
  align-items:start;
}

.page-about .page-about__quality-figure{
  margin:0;
  border:2px solid var(--jy-ink);
  box-shadow:var(--jy-shadow-panel);
}

.page-about .page-about__quality-figure figcaption{
  padding:10px 14px;
  background:var(--jy-ink);
  color:var(--jy-silver);
  font-size:13px;
  line-height:1.6;
}

.page-about .page-about__quality-copy p{
  font-size:16.5px;
  line-height:1.78;
  color:var(--jy-mist);
  margin:0 0 14px;
}

.page-about .page-about__bar{
  display:flex;
  height:26px;
  margin:22px 0 12px;
  border:2px solid var(--jy-ink);
  background:var(--jy-night);
  overflow:hidden;
}

.page-about .page-about__bar-pass{
  flex:99.4 1 0;
  min-width:0;
  background:linear-gradient(90deg,rgba(47,227,210,.9),rgba(47,227,210,.42));
}

.page-about .page-about__bar-err{
  flex:.6 1 0;
  min-width:5px;
  background:var(--jy-orange);
}

.page-about .page-about__bar-legend{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  margin:0 0 20px;
  padding:0;
  font-family:var(--jy-font-utility);
  font-size:13.5px;
  letter-spacing:.05em;
  color:var(--jy-silver);
}

.page-about .page-about__bar-legend li{
  display:flex;
  align-items:center;
  gap:8px;
}

.page-about .page-about__swatch{
  display:inline-block;
  width:12px;
  height:12px;
  flex:0 0 auto;
}

.page-about .page-about__swatch--pass{
  background:var(--jy-cyan);
}

.page-about .page-about__swatch--err{
  background:var(--jy-orange);
}

.page-about .page-about__bar-num{
  font-family:var(--jy-font-numeric);
  font-weight:700;
  color:var(--jy-mist);
}

.page-about .page-about__quality-link{
  margin-top:18px;
}

/* ---------- 合作生态 ---------- */
.page-about .page-about__eco-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:16px;
  margin:clamp(24px,4vw,38px) 0;
}

.page-about .page-about__eco-card{
  box-sizing:border-box;
  background:var(--jy-moss);
  border:2px solid var(--jy-ink);
  border-left:4px solid var(--jy-orange);
  padding:22px 20px;
  box-shadow:var(--about-card-shadow);
}

.page-about .page-about__eco-num{
  font-family:var(--jy-font-numeric);
  font-weight:700;
  font-size:clamp(30px,4.4vw,46px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--jy-cyan);
  margin:0 0 8px;
}

.page-about .page-about__eco-name{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:19px;
  line-height:1.35;
  color:#fff;
  margin:0 0 10px;
}

.page-about .page-about__eco-card p:last-child{
  font-size:15.5px;
  line-height:1.75;
  color:var(--jy-mist);
  margin:0;
}

.page-about .page-about__school{
  border:2px solid var(--jy-ink);
  box-shadow:var(--jy-shadow-hard);
}

.page-about .page-about__school-title{
  font-family:var(--jy-font-editorial);
  font-weight:600;
  font-size:clamp(21px,2.8vw,27px);
  line-height:1.35;
  color:var(--jy-ink);
  margin:12px 0 12px;
}

.page-about .page-about__school p{
  font-size:16px;
  line-height:1.76;
  color:#3a322a;
  margin:0 0 12px;
}

.page-about .page-about__school-link{
  margin:0;
}

/* ---------- 品牌主张 ---------- */
.page-about .page-about__creed{
  position:relative;
  padding-bottom:clamp(48px,7vw,88px);
}

.page-about .page-about__creed::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:100%;
  background:linear-gradient(180deg,rgba(15,43,38,.9),rgba(11,26,34,.2));
  z-index:0;
  pointer-events:none;
}

.page-about .page-about__creed-inner{
  position:relative;
  z-index:1;
}

.page-about .page-about__creed-lead{
  font-family:var(--jy-font-display);
  font-weight:700;
  font-size:clamp(19px,2.4vw,25px);
  line-height:1.5;
  color:var(--jy-cyan);
  margin:0 0 16px;
  max-width:30em;
}

.page-about .page-about__creed-inner > p{
  max-width:44em;
  font-size:16.5px;
  line-height:1.78;
  color:var(--jy-mist);
  margin:0 0 16px;
}

.page-about .page-about__creed-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}

.page-about .page-about__creed-hint{
  margin-top:20px;
  font-family:var(--jy-font-utility);
  font-size:13.5px;
  letter-spacing:.04em;
  color:var(--jy-silver);
}

/* ---------- 断点：平板 ---------- */
@media (min-width:700px){
  .page-about .page-about__roles{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:18px;
  }

  .page-about .page-about__steps{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
  }

  .page-about .page-about__eco-grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:18px;
  }
}

/* ---------- 断点：桌面 ---------- */
@media (min-width:900px){
  .page-about .page-about__hero::before{
    left:auto;
    right:0;
    width:47%;
    background:linear-gradient(160deg,var(--jy-moss) 0%,var(--jy-night) 92%);
    clip-path:polygon(26% 0,100% 0,100% 100%,0 100%);
  }

  .page-about .page-about__hero-grid{
    grid-template-columns:minmax(0,1.18fr) minmax(0,1fr);
    gap:clamp(30px,4.5vw,64px);
  }

  .page-about .page-about__hero-figure{
    transform:translateY(-8px) rotate(1.1deg);
  }

  .page-about .page-about__era:nth-child(1){--era-w:100%;}
  .page-about .page-about__era:nth-child(2){--era-w:94%;}
  .page-about .page-about__era:nth-child(3){--era-w:88%;}
  .page-about .page-about__era:nth-child(4){--era-w:82%;}
  .page-about .page-about__era:nth-child(5){--era-w:76%;}

  .page-about .page-about__roles{
    grid-template-columns:1.35fr 1fr 1fr;
    gap:18px;
  }

  .page-about .page-about__role--lead{
    grid-row:span 2;
  }

  .page-about .page-about__roles .page-about__role:nth-child(4){
    grid-column:span 2;
  }

  .page-about .page-about__steps{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:18px;
  }

  .page-about .page-about__quality-figure{
    position:sticky;
    top:96px;
  }
}

@media (min-width:1200px){
  .page-about .page-about__era{
    padding-left:52px;
  }

  .page-about .page-about__era-dot{
    left:-47px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  .page-about .page-about__era-body,
  .page-about .page-about__role,
  .page-about .page-about__step,
  .page-about .page-about__role-out{
    transition:none;
  }

  .page-about .page-about__hero-title{
    transform:none;
  }

  .page-about .page-about__hero-figure{
    transform:none;
  }
}