/* ============================================================
   about.css — 关于我们（L2 全屏大字 + 错位）
   墨绿 + 米白 + 浅棕；大字排版、竖排装饰、错位分栏、阶梯卡片
   ============================================================ */

/* ---------- Hero：全屏大字 ---------- */
.ab-hero{
  position:relative; min-height:100vh; display:flex; align-items:flex-end;
  padding:calc(var(--header-h) + 40px) 0 70px; overflow:hidden;
  background:var(--green-950);
}
.ab-hero__media{ position:absolute; inset:0; }
.ab-hero__media img{ width:100%; height:100%; object-fit:cover; opacity:.42; }
.ab-hero__veil{
  position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(27,42,33,.55) 0%,rgba(27,42,33,.35) 45%,rgba(27,42,33,.92) 100%);
}
.ab-hero__content{ position:relative; z-index:3; color:var(--cream-50); }
.ab-hero__eyebrow{
  font-size:13px; letter-spacing:.4em; color:var(--brown-500);
  margin:22px 0 10px;
}
.ab-hero h1{
  color:var(--cream-50);
  font-size:clamp(46px,8.5vw,108px); line-height:1.08; letter-spacing:.02em;
  max-width:14ch;
}
.ab-hero h1 em{ font-style:normal; color:var(--brown-500); position:relative; }
.ab-hero h1 em::after{
  content:""; position:absolute; left:0; right:0; bottom:8px; height:14px;
  background:rgba(176,141,102,.28); z-index:-1;
}
.ab-hero__lead{
  color:rgba(251,248,241,.82); font-size:17px; max-width:560px; margin:26px 0 34px;
}
.ab-hero__actions{ display:flex; flex-wrap:wrap; gap:14px; }

/* 竖排装饰文字 */
.ab-hero__vertical{
  position:absolute; right:clamp(18px,5vw,60px); top:50%; transform:translateY(-50%);
  writing-mode:vertical-rl; letter-spacing:.6em; font-size:15px;
  color:rgba(251,248,241,.4); z-index:2; font-family:var(--font-serif);
}
/* 浮动印章圆环 */
.ab-hero__ring{
  position:absolute; right:12%; top:22%; width:120px; height:120px; z-index:2;
  color:var(--brown-500); opacity:.85; animation:abSpin 26s linear infinite;
}
@keyframes abSpin{ to{ transform:rotate(360deg); } }

/* ---------- 品牌故事：错位宽文窄图 ---------- */
.ab-story__grid{
  display:grid; grid-template-columns:1.55fr 1fr; gap:clamp(30px,5vw,70px);
  align-items:start;
}
.ab-story__copy h2{ margin-bottom:20px; }
.ab-story__copy p{ margin-bottom:16px; }
.ab-story__copy .btn{ margin-top:10px; }
.ab-story__pic{ margin-top:60px; }
.ab-story__pic img{
  border-radius:var(--radius-m); box-shadow:var(--shadow-md);
  transform:rotate(1.4deg);
}
.ab-story__pic figcaption{
  margin-top:12px; font-size:13px; color:var(--muted);
  border-left:2px solid var(--brown-500); padding-left:12px;
}

/* ---------- 服务理念：阶梯卡片 ---------- */
.ab-values__grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:26px;
}
.ab-value{
  background:var(--cream-50); border:1px solid var(--line);
  border-radius:var(--radius-m); padding:36px 30px; position:relative;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.ab-value:nth-child(2){ margin-top:44px; }
.ab-value:nth-child(3){ margin-top:88px; }
.ab-value:hover{ transform:translateY(-8px); box-shadow:var(--shadow-md); }
.ab-value__num{
  display:inline-flex; align-items:center; justify-content:center;
  width:52px; height:52px; border-radius:50%;
  background:var(--green-900); color:var(--cream-50);
  font-family:var(--font-serif); font-size:20px; margin-bottom:20px;
}
.ab-value h3{ margin-bottom:12px; }
.ab-value p{ font-size:15px; }

/* ---------- 业务范围 ---------- */
.ab-range__grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:18px;
}
.ab-range__item{
  display:flex; flex-direction:column; gap:8px;
  padding:26px 22px; background:var(--cream-50);
  border:1px solid var(--line); border-radius:var(--radius-s);
  border-bottom:3px solid transparent; transition:all .35s var(--ease);
}
.ab-range__item b{ font-family:var(--font-serif); font-size:18px; color:var(--green-900); }
.ab-range__item span{ font-size:13.5px; color:var(--muted); }
.ab-range__item:hover{ border-bottom-color:var(--brown-500); transform:translateY(-4px); box-shadow:var(--shadow-sm); }

/* ---------- 数据一览 ---------- */
.ab-stats__grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.ab-stat{
  border-left:1px solid rgba(251,248,241,.2); padding:8px 0 8px 26px;
}
.ab-stat b{
  font-family:var(--font-serif); font-size:clamp(40px,5vw,64px);
  color:var(--cream-50); line-height:1; display:flex; align-items:baseline;
}
.ab-stat b span{ font-size:20px; color:var(--brown-500); margin-left:6px; }
.ab-stat span:last-child{
  display:block; margin-top:14px; font-size:14px;
  color:rgba(251,248,241,.6);
}

/* ---------- 服务承诺 ---------- */
.ab-promise__grid{
  display:grid; grid-template-columns:1fr 1.3fr; gap:clamp(30px,5vw,70px);
  align-items:start;
}
.ab-promise__head h2{ margin:14px 0 16px; }
.ab-promise__list{
  border-top:1px solid var(--line);
}
.ab-promise__list li{
  padding:18px 0 18px 34px; border-bottom:1px solid var(--line);
  position:relative; color:var(--ink-soft); font-size:15.5px;
}
.ab-promise__list li::before{
  content:""; position:absolute; left:0; top:26px;
  width:16px; height:16px; border-radius:50%;
  border:2px solid var(--brown-500);
}

/* ---------- FAQ ---------- */
.ab-faq__list{ max-width:860px; margin:0 auto; }
.ab-faq-item{
  border:1px solid var(--line); border-radius:var(--radius-s);
  background:var(--cream-50); margin-bottom:14px; overflow:hidden;
}
.ab-faq-item summary{
  list-style:none; cursor:pointer; display:flex; align-items:center;
  justify-content:space-between; gap:16px;
  padding:20px 24px; font-weight:600; color:var(--green-900); font-size:16.5px;
}
.ab-faq-item summary::-webkit-details-marker{ display:none; }
.ab-faq-item summary span{
  flex:none; width:26px; height:26px; border-radius:50%;
  border:1.5px solid var(--brown-500); position:relative; transition:transform .35s var(--ease);
}
.ab-faq-item summary span::before,
.ab-faq-item summary span::after{
  content:""; position:absolute; inset:0; margin:auto;
  background:var(--brown-500);
}
.ab-faq-item summary span::before{ width:10px; height:1.5px; }
.ab-faq-item summary span::after{ width:1.5px; height:10px; }
.ab-faq-item[open] summary span::after{ opacity:0; }
.ab-faq-item p{ padding:0 24px 22px; font-size:15px; }
.ab-faq__more{ display:flex; flex-wrap:wrap; gap:14px; justify-content:center; margin-top:30px; }

/* ---------- 预约 CTA ---------- */
.ab-booking__inner{
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(30px,5vw,70px);
  align-items:center;
  background:var(--green-900); border-radius:var(--radius-l);
  padding:clamp(36px,5vw,64px); position:relative; overflow:hidden;
}
.ab-booking__inner::before{
  content:""; position:absolute; right:-80px; top:-80px;
  width:260px; height:260px; border-radius:50%;
  border:1.5px dashed rgba(176,141,102,.5);
}
.ab-booking__copy h2{ color:var(--cream-50); margin:14px 0 16px; }
.ab-booking__copy p{ color:rgba(251,248,241,.78); }
.ab-booking__phone{ margin-top:22px; font-size:20px; }
.ab-booking__phone a{ color:var(--brown-500); font-weight:700; font-size:24px; }
.ab-booking__form{
  background:var(--cream-50); border-radius:var(--radius-m); padding:28px;
  display:flex; flex-direction:column; gap:16px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .ab-story__grid,.ab-promise__grid,.ab-booking__inner{ grid-template-columns:1fr; }
  .ab-story__pic{ margin-top:0; }
  .ab-values__grid{ grid-template-columns:1fr; }
  .ab-value:nth-child(2),.ab-value:nth-child(3){ margin-top:0; }
  .ab-range__grid{ grid-template-columns:repeat(2,1fr); }
  .ab-stats__grid{ grid-template-columns:repeat(2,1fr); }
  .ab-hero__vertical{ display:none; }
  .ab-hero__ring{ width:80px; height:80px; right:20px; top:16%; }
}
@media (max-width:640px){
  .ab-range__grid{ grid-template-columns:1fr; }
  .ab-stats__grid{ grid-template-columns:1fr 1fr; }
}