/* ============================================================
   service-beian.css — 网站备案服务详情页
   布局：居中 Hero + 横向迷你流程条 / 左文右图定义 /
   需要vs不需要对比双栏 / 五步横向卡 / 视差数据条 / FAQ / CTA
   ============================================================ */

/* ---------- 1. Hero 居中 + 底部流程条 ---------- */
.ba-hero{
  min-height:96vh;position:relative;overflow:hidden;
  background:var(--ink);color:#fff;
  display:flex;flex-direction:column;justify-content:center;
  padding:150px 0 0;
}
.ba-hero-bg{z-index:0}
.ba-hero-veil{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(16,15,13,.88) 0%,rgba(16,15,13,.68) 55%,rgba(16,15,13,.95) 100%);
}
.ba-hero-inner{
  position:relative;z-index:2;text-align:center;
  display:flex;flex-direction:column;align-items:center;
}
.ba-crumb{font-size:13px;color:#CFC7B8;margin-bottom:22px;font-weight:600}
.ba-crumb a{color:#CFC7B8;transition:color .3s}
.ba-crumb a:hover{color:var(--coffee-bright)}
.ba-crumb em{font-style:normal;color:var(--coffee-bright)}
.ba-eyebrow{
  display:inline-block;padding:8px 22px;border-radius:100px;
  border:1px solid rgba(201,168,124,.55);color:var(--coffee-bright);
  font-size:13px;font-weight:700;letter-spacing:.12em;margin-bottom:24px;
}
.ba-hero-title{
  font-size:clamp(34px,5vw,60px);font-weight:900;color:#fff;
  line-height:1.25;margin-bottom:20px;
}
.ba-gold{
  background:linear-gradient(120deg,#E8CD9D,#C9A87C);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.ba-hero-sub{font-size:16px;color:#D8D0C2;line-height:1.9;max-width:640px;margin-bottom:34px}
.ba-hero-cta{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}

/* Hero 底部流程条 */
.ba-hero-strip{
  position:relative;z-index:2;margin-top:64px;
  background:rgba(255,255,255,.06);backdrop-filter:blur(8px);
  border-top:1px solid rgba(255,255,255,.12);
}
.ba-strip-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
}
.ba-step{
  display:flex;align-items:center;gap:14px;padding:26px 10px;
  border-left:1px solid rgba(255,255,255,.1);
}
.ba-step:first-child{border-left:none}
.ba-step b{
  width:38px;height:38px;border-radius:50%;flex-shrink:0;
  background:var(--grad-coffee);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:900;
}
.ba-step span{font-size:14px;font-weight:700;color:#EDE6DA}

/* ---------- 2. 什么是备案 左文右图 ---------- */
.ba-what{background:#fff}
.ba-what-inner{
  display:grid;grid-template-columns:1.15fr 1fr;gap:64px;align-items:center;
}
.ba-what-text p{color:var(--text-2);line-height:1.9;margin-bottom:14px}
.ba-what-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.ba-what-tags span{
  padding:8px 18px;border-radius:100px;border:1.5px solid var(--line);
  font-size:13px;font-weight:700;color:var(--coffee-deep);
  transition:all .3s;
}
.ba-what-tags span:hover{background:var(--coffee-bg);border-color:var(--coffee)}
.ba-what-media img{
  border-radius:var(--radius-lg);aspect-ratio:16/11;object-fit:cover;
  box-shadow:var(--shadow-lg);
}

/* ---------- 3. 需要/不需要对比双栏 ---------- */
.ba-cases{background:var(--coffee-bg)}
.ba-vs{
  display:grid;grid-template-columns:1fr auto 1fr;gap:28px;align-items:stretch;
}
.ba-vs-card{
  background:#fff;border-radius:var(--radius-lg);padding:38px 36px;
  box-shadow:var(--shadow-sm);
}
.ba-vs-card li{
  position:relative;padding:13px 0 13px 32px;
  font-size:15px;line-height:1.75;color:var(--text);
  border-bottom:1px dashed var(--line);
}
.ba-vs-card li:last-child{border-bottom:none}
.ba-yes li::before{
  content:"";position:absolute;left:4px;top:20px;
  width:12px;height:7px;border-left:2.5px solid var(--coffee-deep);
  border-bottom:2.5px solid var(--coffee-deep);transform:rotate(-45deg);
}
.ba-no li::before{
  content:"";position:absolute;left:6px;top:19px;
  width:11px;height:11px;border:2px solid #C7B9A4;border-radius:3px;
}
.bvs-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.bvs-head svg{width:26px;height:26px}
.ba-yes .bvs-head svg{color:var(--coffee-deep)}
.ba-no .bvs-head svg{color:#B9AE9C}
.bvs-head h3{font-size:22px}
.ba-vs-mid{
  align-self:center;font-size:24px;font-weight:900;color:var(--coffee-deep);
  width:64px;height:64px;border-radius:50%;background:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);
}

/* ---------- 4. 五步横向卡 ---------- */
.ba-step5{
  display:grid;grid-template-columns:repeat(5,1fr);gap:20px;
}
.ba-s5{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-md);padding:32px 22px 26px;
  transition:all .4s;overflow:hidden;
}
.ba-s5::after{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--grad-coffee);transform:scaleX(0);transform-origin:left;
  transition:transform .4s;
}
.ba-s5:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.ba-s5:hover::after{transform:scaleX(1)}
.bas5-num{
  font-size:40px;font-weight:900;color:var(--coffee-bg-2);
  display:block;line-height:1;margin-bottom:18px;
  font-variant-numeric:tabular-nums;
}
.ba-s5 h3{font-size:17px;margin-bottom:8px}
.ba-s5 p{font-size:13.5px;color:var(--text-2);line-height:1.8}

.ba-relate{
  margin-top:40px;padding:22px 28px;border-radius:var(--radius-md);
  background:var(--coffee-bg);display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.ba-relate span{font-weight:800;color:var(--ink);flex-shrink:0}
.ba-relate a{
  padding:7px 16px;border-radius:100px;background:#fff;
  color:var(--coffee-deep);font-weight:700;transition:all .3s;
  font-size:14px;
}
.ba-relate a:hover{background:var(--grad-coffee);color:#fff}

/* ---------- 5. 数据条 ---------- */
.ba-nums{position:relative;overflow:hidden;padding:90px 0;background:var(--ink)}
.ba-nums-bg{z-index:0}
.ba-nums-veil{position:absolute;inset:0;z-index:1;background:rgba(16,15,13,.82)}
.ba-nums-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;
}
.ba-num b{
  display:block;font-size:clamp(36px,4.4vw,54px);font-weight:900;
  color:var(--coffee-bright);line-height:1.1;
  font-variant-numeric:tabular-nums;
}
.ba-num span{font-size:14px;color:#CFC7B8;margin-top:10px;display:block}

/* ---------- 6. FAQ ---------- */
.ba-acc{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.acc-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  overflow:hidden;transition:box-shadow .3s;
}
.acc-item.open{box-shadow:var(--shadow-md);border-color:var(--coffee)}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 28px;text-align:left;font-size:17px;font-weight:800;color:var(--ink);
}
.acc-head svg{width:18px;height:18px;color:var(--coffee-deep);flex-shrink:0;transition:transform .35s}
.acc-item.open .acc-head svg{transform:rotate(180deg)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc-panel p{padding:0 28px 24px;color:var(--text-2);font-size:15px;line-height:1.9}
.acc-panel a{color:var(--coffee-deep);font-weight:700;text-decoration:underline}

/* ---------- 7. CTA ---------- */
.ba-cta{position:relative;overflow:hidden;background:var(--ink);text-align:center}
.ba-cta-bg{z-index:0}
.ba-cta-veil{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(16,15,13,.9),rgba(16,15,13,.72))}
.ba-cta-inner{position:relative;z-index:2}
.ba-cta-title{font-size:clamp(28px,4vw,44px);color:#fff;font-weight:900;line-height:1.4;margin-bottom:18px}
.ba-cta-sub{color:#CFC7B8;font-size:16px;margin-bottom:36px}
.ba-cta-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .ba-what-inner{grid-template-columns:1fr;gap:40px}
  .ba-vs{grid-template-columns:1fr}
  .ba-vs-mid{margin:0 auto}
  .ba-step5{grid-template-columns:repeat(2,1fr)}
  .ba-nums-inner{grid-template-columns:repeat(2,1fr);row-gap:40px}
  .ba-strip-inner{grid-template-columns:repeat(2,1fr)}
  .ba-step{border-left:none;border-top:1px solid rgba(255,255,255,.1)}
}
@media (max-width:640px){
  .ba-step5{grid-template-columns:1fr}
  .ba-strip-inner{grid-template-columns:1fr 1fr}
}