/* ============================================================
   客户案例页 cases.css（页面私有样式，仅服务 cases.html）
   规范：严格 PC 端，内容宽度 1380px，主色 #ff2442
   ============================================================ */

/* ---------------- 章节标题（本页细化） ---------------- */
.sec-head .sec-tag{border-radius:20px;padding:5px 16px;font-weight:700;letter-spacing:1.5px;}
.sec-head .sec-tag::before{content:"";display:inline-block;width:14px;height:14px;margin-right:7px;
  background:url(../images/sparkling-line.png) no-repeat center/contain;vertical-align:-2px;
  filter:invert(30%) sepia(94%) saturate(7485%) hue-rotate(345deg) brightness(98%) contrast(107%);}
.sec-title .dot{font-weight:800;}

/* ---------------- 页面头部 ---------------- */
.page-hero{position:relative;padding:74px 0 66px;background:var(--ink);overflow:hidden;display:flex;flex-direction:column;justify-content:center;min-height:690px;}
.page-hero::before{content:"";position:absolute;left:0;top:0;right:0;bottom:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(135deg,#000 0%,rgba(0,0,0,.3) 55%,transparent 85%);
  mask-image:linear-gradient(135deg,#000 0%,rgba(0,0,0,.3) 55%,transparent 85%);}
.page-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,36,66,.2),transparent 68%);}
.page-hero .wrap{position:relative;z-index:1;}
.ph-tag{display:inline-block;padding:5px 14px;border:1px solid rgba(255,255,255,.3);border-radius:20px;
  font-size:12.5px;letter-spacing:2px;color:rgba(255,255,255,.82);}
.ph-tag::before{content:"";display:inline-block;width:6px;height:6px;margin-right:8px;border-radius:50%;
  background:var(--brand);vertical-align:1px;}
.page-hero h1{margin:20px 0 0;font-size:42px;font-weight:800;color:#fff;line-height:1.34;letter-spacing:1px;max-width:980px;}
.page-hero h1 .hl{color:var(--brand);}
.ph-desc{margin-top:20px;max-width:900px;font-size:16.5px;color:rgba(255,255,255,.78);line-height:1.95;}
.ph-desc b{color:#fff;font-weight:600;}
/* 三段式说明条 */
.ph-three{margin-top:26px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.ph-three .t3{padding:9px 18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:8px;font-size:13.5px;color:#fff;font-weight:600;}
.ph-three .t3 em{font-style:normal;color:var(--brand);}
.ph-three .ar{color:rgba(255,255,255,.4);font-size:14px;}
.ph-actions{margin-top:30px;display:flex;gap:16px;}
.ph-actions .btn{box-shadow:0 10px 26px rgba(255,36,66,.28);}
.ph-actions .btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,36,66,.36);}
.ph-actions .btn-ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff;box-shadow:none;}
.ph-actions .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;box-shadow:none;}
.ph-stats{margin-top:42px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14);
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.ph-stats li{position:relative;padding-left:24px;}
.ph-stats li:first-child{padding-left:0;}
.ph-stats li::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:1px;background:rgba(255,255,255,.16);}
.ph-stats li:first-child::before{display:none;}
.ph-stats li b{display:block;font-size:26px;font-weight:800;color:#fff;letter-spacing:.5px;}
.ph-stats li span{display:block;margin-top:6px;font-size:13px;color:rgba(255,255,255,.6);}

/* ---------------- 分组筛选按钮 ---------------- */
.cs-tabs{display:flex;flex-wrap:wrap;gap:10px;padding:20px 24px;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:0 6px 20px rgba(15,23,42,.05);}
.cs-tab{padding:9px 20px;background:#fafbfc;border:1px solid var(--line);border-radius:22px;
  font-family:inherit;font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;transition:all .2s;}
.cs-tab:hover{border-color:var(--brand);color:var(--brand);}
.cs-tab.active{background:var(--brand);border-color:var(--brand);color:#fff;
  box-shadow:0 6px 16px rgba(255,36,66,.22);}
.cs-tab small{margin-left:6px;font-size:12px;opacity:.7;}

/* ---------------- 分组区块 ---------------- */
.cs-group{margin-top:32px;}
.cs-head{display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:20px 26px;background:var(--ink);border-radius:12px 12px 0 0;}
.cs-head .h-l{display:flex;align-items:center;gap:14px;}
.cs-head .h-no{display:flex;align-items:center;justify-content:center;width:34px;height:34px;
  border-radius:9px;background:var(--brand);color:#fff;font-size:13px;font-weight:800;}
.cs-head h2{font-size:21px;color:#fff;}
.cs-head .h-l span{font-size:13px;color:rgba(255,255,255,.65);}
.cs-head .h-kw{font-size:13px;color:rgba(255,255,255,.7);}
.cs-head .h-kw b{color:var(--brand);}
.cs-sub{margin:22px 0 14px;display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;}
.cs-sub::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--brand);transform:rotate(45deg);}
.cs-sub span{margin-left:6px;font-size:13px;font-weight:400;color:var(--ink-3);}

/* ---------------- 案例卡 ---------------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:26px 26px;
  background:#fafbfc;border:1px solid var(--line);border-top:0;border-radius:0 0 12px 12px;}
.case-card{display:flex;flex-direction:column;padding:24px 24px;background:#fff;border:1px solid var(--line);
  border-radius:10px;transition:all .22s;}
.case-card:hover{border-color:var(--brand);transform:translateY(-3px);
  box-shadow:0 14px 32px rgba(255,36,66,.12);}
.case-card .c-top{display:flex;align-items:center;gap:9px;margin-bottom:14px;}
.case-card .c-no{display:flex;align-items:center;justify-content:center;width:24px;height:24px;
  border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:11.5px;font-weight:800;}
.case-card h4{font-size:17px;}
.case-card .c-tag{margin-left:auto;padding:3px 10px;border-radius:20px;background:var(--bg-soft);
  font-size:11.5px;font-weight:700;color:var(--ink-3);}
/* 三段式 */
.case-card dl{margin:0;flex:1 1 auto;}
.case-card dt{margin-top:12px;display:flex;align-items:center;gap:6px;font-size:11.5px;font-weight:800;
  color:var(--ink-3);letter-spacing:1.5px;}
.case-card dt::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-soft);}
.case-card dt.res{color:var(--brand);}
.case-card dt.res::before{background:var(--brand);}
.case-card dd{margin-top:5px;font-size:13.2px;color:var(--ink-2);line-height:1.8;}
.case-card dd.res{color:var(--ink);}
.case-card .num{color:var(--brand);font-weight:800;}
/* 佐证 + 边界 */
.case-card .c-proof{margin-top:14px;padding:11px 14px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 8px 8px 0;font-size:12.8px;color:var(--ink-2);line-height:1.75;}
.case-card .c-proof b{color:var(--brand);}
.case-card .c-edge{margin-top:9px;padding:9px 14px;background:#fafbfc;border-left:3px solid var(--ink-3);
  border-radius:0 8px 8px 0;font-size:12.2px;color:var(--ink-3);line-height:1.7;}
.case-card .c-edge b{color:var(--ink-2);}
/* 客户原话 */
.case-card .c-quote{margin-top:12px;padding:12px 16px;background:#fff;border:1px dashed var(--line);
  border-radius:8px;font-size:12.8px;color:var(--ink-2);line-height:1.8;}
.case-card .c-quote::before{content:"\201C";font-family:Georgia,"Times New Roman",serif;
  font-size:22px;line-height:1;color:var(--brand);margin-right:6px;vertical-align:-3px;opacity:.6;}

/* ---------------- 小红书线：紧凑指标卡 ---------------- */
.case-grid.tight{grid-template-columns:repeat(3,1fr);gap:14px;}
.mini-card{padding:20px 20px;background:#fff;border:1px solid var(--line);border-radius:10px;transition:all .22s;}
.mini-card:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:0 14px 32px rgba(255,36,66,.12);}
.mini-card .m-top{display:flex;align-items:center;gap:8px;margin-bottom:12px;}
.mini-card .m-no{display:flex;align-items:center;justify-content:center;width:22px;height:22px;
  border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:11px;font-weight:800;}
.mini-card h5{font-size:15.5px;}
.mini-card .m-num{margin-bottom:10px;padding:12px 14px;background:var(--brand-soft);border-radius:8px;
  font-size:15px;font-weight:800;color:var(--brand);line-height:1.6;}
.mini-card .m-num em{font-style:normal;font-size:12.5px;font-weight:600;color:var(--ink-2);}
.mini-card p{font-size:12.6px;color:var(--ink-2);line-height:1.8;}
.mini-card p b{color:var(--ink);}
.mini-card .m-res{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);
  font-size:12.4px;color:var(--ink-3);line-height:1.75;}
.mini-card .m-res b{color:var(--brand);}

/* ---------------- 暂无自有案例（诚实卡片） ---------------- */
.no-case{margin-top:4px;padding:26px 28px;background:#fff;border:1px dashed var(--brand);border-radius:12px;
  display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.no-case .n-l .n-tag{display:inline-block;padding:4px 12px;border-radius:20px;background:var(--brand-soft);
  font-size:12px;font-weight:800;color:var(--brand);letter-spacing:1.5px;}
.no-case .n-l h4{margin:12px 0 8px;font-size:19px;}
.no-case .n-l p{font-size:13.5px;color:var(--ink-2);line-height:1.85;}
.no-case .n-l p b{color:var(--ink);}
.no-case .n-r{padding:20px 22px;background:#fafbfc;border-radius:10px;}
.no-case .n-r .n-t{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:1.5px;}
.no-case .n-r ul{margin-top:10px;}
.no-case .n-r li{position:relative;margin-bottom:7px;padding-left:18px;font-size:13px;color:var(--ink-2);line-height:1.75;}
.no-case .n-r li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand);}

/* ---------------- 案例呈现结构 ---------------- */
.struct-4{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.st-cell{position:relative;padding:24px 22px;background:#fff;border:1px solid var(--line);transition:all .22s;}
.st-cell:first-child{border-radius:12px 0 0 12px;}
.st-cell:last-child{border-radius:0 12px 12px 0;}
.st-cell + .st-cell{border-left:0;}
.st-cell:hover{z-index:2;box-shadow:inset 0 0 0 1px var(--brand),0 12px 28px rgba(15,23,42,.08);}
.st-cell .s-no{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;
  border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:11.5px;font-weight:800;}
.st-cell h5{margin:12px 0 7px;font-size:15.5px;}
.st-cell p{font-size:12.8px;color:var(--ink-2);line-height:1.8;}
.st-cell::after{content:"\2192";position:absolute;right:-11px;top:50%;margin-top:-11px;z-index:3;
  width:22px;height:22px;border-radius:50%;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:12px;font-weight:800;}
.st-cell:last-child::after{display:none;}
.struct-note{margin-top:18px;padding:18px 26px;background:var(--brand-soft);border-left:4px solid var(--brand);
  border-radius:0 10px 10px 0;font-size:13.8px;color:var(--ink-2);line-height:1.85;}
.struct-note b{color:var(--brand);}

/* ---------------- 结果免责声明 ---------------- */
.disclaimer{padding:26px 30px;background:var(--ink);border-radius:12px;}
.disclaimer .d-t{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;color:#fff;}
.disclaimer .d-t::before{content:"!";flex-shrink:0;display:flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:50%;background:var(--brand);color:#fff;font-size:12px;font-weight:800;}
.disclaimer p{margin-top:10px;font-size:13.5px;color:rgba(255,255,255,.72);line-height:1.9;}
.disclaimer p b{color:#fff;}

/* ---------------- 双 CTA ---------------- */
.cases-cta{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.cases-cta .card{position:relative;overflow:hidden;padding:42px 38px;border-radius:14px;background:var(--ink);color:#fff;
  transition:all .22s;}
.cases-cta .card.red{background:var(--brand);}
.cases-cta .card::after{content:"";position:absolute;right:-70px;bottom:-90px;width:260px;height:260px;
  border-radius:50%;background:rgba(255,255,255,.07);}
.cases-cta .card:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(15,23,42,.2);}
.cases-cta .card>*{position:relative;z-index:1;}
.cases-cta .kicker{font-size:13px;letter-spacing:2px;color:rgba(255,255,255,.6);}
.cases-cta h3{margin:12px 0 12px;font-size:23px;}
.cases-cta p{font-size:14px;color:rgba(255,255,255,.78);line-height:1.85;min-height:76px;}
.cases-cta .btn{margin-top:20px;background:#fff;border-color:#fff;color:var(--brand);}
.cases-cta .btn:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px);}

/* ---------------- FAQ（左侧问题 / 右侧答案） ---------------- */
.faq-layout{display:grid;grid-template-columns:320px 1fr;gap:22px;}
.faq-tabs{display:flex;flex-direction:column;gap:10px;justify-content:space-between;}
.faq-tab{padding:16px 20px;text-align:left;background:#fff;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:14.5px;font-weight:600;color:var(--ink-2);line-height:1.6;
  cursor:pointer;transition:all .2s;box-shadow:0 4px 14px rgba(15,23,42,.035);}
.faq-tab .t-no{display:block;margin-bottom:6px;font-size:11.5px;font-weight:800;color:var(--brand);letter-spacing:1.5px;}
.faq-tab:hover{border-color:var(--brand);color:var(--brand);}
.faq-tab.active{background:var(--ink);border-color:var(--ink);color:#fff;}
.faq-tab.active .t-no{color:var(--brand);}
.faq-panes{padding:28px 32px;background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:0 4px 14px rgba(15,23,42,.035);}
.faq-pane{display:none;}
.faq-pane.active{display:block;}
.pane-q{padding-bottom:14px;border-bottom:1px solid var(--line);font-size:19px;line-height:1.6;}
.pane-q .q-no{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;margin-right:10px;
  border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:11.5px;font-weight:800;vertical-align:2px;}
.faq-pane .faq-a{display:block;padding-top:18px;}
.faq-a .lead{font-size:15px;color:var(--ink);line-height:1.9;}
.faq-a .lead b{color:var(--brand);}
.faq-a ul{margin-top:14px;}
.faq-a li{position:relative;margin-bottom:8px;padding-left:18px;font-size:13.8px;color:var(--ink-2);line-height:1.85;}
.faq-a li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand);}
.faq-a li b{color:var(--ink);}
.faq-a .note{margin-top:14px;padding:14px 18px;background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 8px 8px 0;font-size:13.5px;color:var(--ink-2);line-height:1.85;}
.faq-a .note b{color:var(--brand);}
.faq-links{margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);display:flex;gap:22px;}
.faq-links a{font-size:13.5px;font-weight:600;color:var(--brand);}
.faq-links a:hover{text-decoration:underline;}

/* ---------------- 通用补强 ---------------- */
.case-card,.mini-card,.no-case,.st-cell{box-shadow:0 4px 14px rgba(15,23,42,.035);}