/* ============================================================
   开发流程 process.css —— 壹捌玖网络科技
   布局：底部数据条 Hero / 竖向时间轴（巨型阶段编号左右交替）/
   交付物清单图标卡 / 暗场承诺卡 / 手风琴 / CTA
   ============================================================ */

/* ---------- 1. Hero（底部内嵌数据条） ---------- */
.hero{
  position:relative;min-height:92vh;display:flex;align-items:flex-end;
  overflow:hidden;background:var(--ink);
}
.hero-bg{background-position:center 30%}
.hero-veil{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(20,20,20,.92) 0%,rgba(20,20,20,.66) 55%,rgba(20,20,20,.3) 100%),
    linear-gradient(0deg,rgba(20,20,20,.85) 0%,rgba(20,20,20,.1) 45%);
}
.hero-inner{position:relative;z-index:3;padding:150px 0 60px;max-width:780px}
.crumb{display:flex;align-items:center;gap:10px;color:#C9C0AF;font-size:13px;margin-bottom:24px;opacity:0;animation:fadeUp .6s .1s ease forwards}
.crumb a{color:#EDE6DA}
.crumb a:hover{color:var(--coffee-bright)}
.crumb em{color:var(--coffee-bright);font-style:normal;font-weight:700}
.hero-title{color:#fff;font-size:clamp(36px,5.4vw,62px);font-weight:900;line-height:1.14;letter-spacing:-.02em;margin-bottom:20px}
.ht-line{display:block;overflow:hidden;opacity:0}
.ht-line:nth-child(1){animation:slideUp .75s .22s cubic-bezier(.22,.68,.4,1) forwards}
.ht-line:nth-child(2){animation:slideUp .75s .4s cubic-bezier(.22,.68,.4,1) forwards}
.ht-gold{color:var(--coffee)}
.hero-sub{color:#D8CFBF;font-size:clamp(15px,1.6vw,17px);line-height:1.9;max-width:660px;margin-bottom:30px;opacity:0;animation:fadeUp .7s .55s ease forwards}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;opacity:0;animation:fadeUp .7s .7s ease forwards}
@keyframes slideUp{from{opacity:0;transform:translateY(44px)}to{opacity:1;transform:none}}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
/* Hero 底部数据条 */
.hero-strip{position:relative;z-index:3;width:100%;border-top:1px solid rgba(255,255,255,.14);background:rgba(20,20,20,.55);backdrop-filter:blur(8px)}
.hs-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 24px}
.hs-item b{display:block;font-size:32px;font-weight:900;color:var(--coffee-bright);font-variant-numeric:tabular-nums;line-height:1.1}
.hs-item span{font-size:13px;color:#C9C0AF}
.scroll-hint{position:absolute;left:50%;bottom:110px;transform:translateX(-50%);width:26px;height:44px;border:2px solid rgba(255,255,255,.4);border-radius:14px;z-index:4;display:flex;justify-content:center;padding-top:8px}
.scroll-hint span{width:3px;height:9px;border-radius:3px;background:#fff;animation:hintDrop 1.8s ease infinite}
@keyframes hintDrop{0%{opacity:0;transform:translateY(0)}35%{opacity:1}100%{opacity:0;transform:translateY(14px)}}
@media (max-width:900px){
  .hs-inner{grid-template-columns:1fr 1fr;gap:18px}
  .hero-inner{padding-bottom:40px}
  .scroll-hint{display:none}
}
@media (max-width:640px){
  .hero{min-height:auto}
  .hero-cta .btn{width:100%}
}

/* ---------- 2. 八阶段竖向时间轴 ---------- */
.stages{background:linear-gradient(180deg,var(--coffee-bg) 0%,#fff 60%)}
.pt-timeline{position:relative;margin-top:20px;display:flex;flex-direction:column;gap:54px;list-style:none}
.pt-timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;transform:translateX(-50%);
  background:linear-gradient(180deg,var(--coffee),var(--coffee-bright) 45%,var(--line));
}
.pt-stage{position:relative;width:calc(50% - 46px)}
.pt-stage:nth-child(even){margin-left:auto}
/* 巨型阶段编号水印 */
.pt-no{
  position:absolute;top:-22px;font-size:128px;font-weight:900;line-height:1;
  color:rgba(201,168,124,.16);font-variant-numeric:tabular-nums;
  user-select:none;letter-spacing:-.04em;
}
.pt-stage:nth-child(odd) .pt-no{right:-150px}
.pt-stage:nth-child(even) .pt-no{left:-150px}
/* 时间轴节点圆点 */
.pt-stage::after{
  content:"";position:absolute;top:34px;width:18px;height:18px;border-radius:50%;
  background:#fff;border:4px solid var(--coffee-deep);box-shadow:0 0 0 6px rgba(201,168,124,.18);
}
.pt-stage:nth-child(odd)::after{right:-56px}
.pt-stage:nth-child(even)::after{left:-56px}
/* 阶段卡片 */
.pt-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:30px 30px 26px;box-shadow:var(--shadow-sm);position:relative;
  transition:all .4s cubic-bezier(.22,.68,.4,1);
}
.pt-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--coffee)}
.pt-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}
.pt-head h3{font-size:21px;font-weight:900}
.pt-time{
  flex-shrink:0;font-size:12px;font-weight:800;color:var(--coffee-deep);
  background:var(--coffee-bg);border:1px solid var(--line);
  padding:6px 12px;border-radius:100px;white-space:nowrap;
}
.pt-what{font-size:14px;color:var(--text-2);line-height:1.9;margin-bottom:18}
.pt-meta{display:grid;gap:10px;border-top:1px dashed var(--line);padding-top:16px}
.pt-col{display:flex;gap:12px;font-size:13.5px;line-height:1.7}
.pt-col b{
  flex-shrink:0;width:74px;font-size:12px;font-weight:800;color:#fff;
  background:var(--grad-ink);border-radius:6px;display:flex;align-items:center;justify-content:center;height:24px;margin-top:2px;
}
.pt-col span{color:var(--text)}
@media (max-width:900px){
  .pt-timeline::before{left:9px}
  .pt-stage,.pt-stage:nth-child(even){width:100%;margin-left:34px}
  .pt-stage::after,.pt-stage:nth-child(odd)::after,.pt-stage:nth-child(even)::after{left:0;right:auto}
  .pt-no,.pt-stage:nth-child(odd) .pt-no,.pt-stage:nth-child(even) .pt-no{font-size:84px;right:auto;left:-6px;top:-30px;opacity:.7}
}

/* ---------- 3. 交付物清单 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.dl-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 26px;
  transition:all .4s cubic-bezier(.22,.68,.4,1);position:relative;overflow:hidden;
}
.dl-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad-coffee);transform:scaleY(0);transform-origin:top;transition:transform .4s}
.dl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.dl-card:hover::before{transform:scaleY(1)}
.dl-ic{
  width:54px;height:54px;border-radius:14px;background:var(--coffee-bg);color:var(--coffee-deep);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;transition:all .4s;
}
.dl-ic svg{width:26px;height:26px}
.dl-card:hover .dl-ic{background:var(--grad-coffee);color:#fff}
.dl-card h3{font-size:17px;margin-bottom:8px}
.dl-card p{font-size:13.5px;color:var(--text-2);line-height:1.8}
@media (max-width:1024px){.dl-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.dl-grid{grid-template-columns:1fr}}

/* ---------- 4. 质量保障承诺（暗场视差） ---------- */
.promise{position:relative;overflow:hidden;background:var(--ink);color:#E9E2D6}
.promise-bg{background-position:center 40%}
.promise-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,20,20,.92),rgba(20,20,20,.86));z-index:1}
.promise .container{position:relative;z-index:2}
.pm-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pm-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:18px;padding:32px 26px;transition:all .4s;
}
.pm-card:hover{background:rgba(201,168,124,.12);border-color:var(--coffee);transform:translateY(-6px)}
.pm-card b{font-size:40px;font-weight:900;color:var(--coffee);line-height:1;display:block;margin-bottom:16px;font-variant-numeric:tabular-nums}
.pm-card h3{color:#fff;font-size:18px;margin-bottom:10px}
.pm-card p{font-size:13.5px;color:#C9C0AF;line-height:1.85}
@media (max-width:1024px){.pm-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.pm-grid{grid-template-columns:1fr}}

/* ---------- 5. FAQ 手风琴 ---------- */
.faqs{background:#fff}
.faq-wrap{max-width:860px}
.acc{border-top:2px solid var(--ink)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 6px;text-align:left;font-size:17px;font-weight:800;color:var(--ink);
  background:none;transition:color .3s;
}
.acc-head:hover{color:var(--coffee-deep)}
.acc-ico{
  flex-shrink:0;width:32px;height:32px;border-radius:50%;
  border:1.5px solid var(--line);font-size:20px;font-weight:400;color:var(--coffee-deep);
  display:flex;align-items:center;justify-content:center;transition:all .35s;
}
.acc-item.open .acc-ico{background:var(--grad-coffee);border-color:transparent;color:#fff;transform:rotate(45deg)}
.acc-item.open .acc-head{color:var(--coffee-deep)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.22,.68,.4,1)}
.acc-panel p{padding:4px 4px 22px;font-size:14.5px;color:var(--text-2);line-height:1.95;max-width:720px}
.acc-more{margin-top:26px;font-size:14px;color:var(--text-2)}
.acc-more a{color:var(--coffee-deep);font-weight:700}
.acc-more a:hover{color:var(--ink)}

/* ---------- 6. CTA ---------- */
.cta{position:relative;overflow:hidden;background:var(--ink);padding:120px 0}
.cta-bg{background-position:center 40%}
.cta-veil{position:absolute;inset:0;background:rgba(20,20,20,.8);z-index:1}
.cta-inner{position:relative;z-index:2;text-align:center}
.cta-title{color:#fff;font-size:clamp(26px,4vw,40px);font-weight:900;margin-bottom:18px}
.cta-sub{color:#D8CFBF;font-size:16px;margin-bottom:38px}
.cta-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media (max-width:640px){.cta-row .btn{width:100%}}