:root{
    --primary:#0a58ca;
    --primary-light:#9ec5fe;
    --bg:#f4f8ff;
    --card:#ffffff;
    --text:#0f172a;
    --desc:#64748b;
    --border:#dbeafe;
}



/* ======================================
   PAGE
====================================== */

.case-page{
    padding:70px 0 100px;
}

/* ======================================
   HERO
====================================== */

.hero-card{
    position:relative;
    overflow:hidden;
    border-radius:32px;
    background:
    linear-gradient(135deg,#ffffff 0%,#f9fbff 100%);
    border:1px solid rgba(10,88,202,.08);
    box-shadow:
    0 15px 50px rgba(10,88,202,.06);
    padding:48px;
    margin-bottom:30px;
    margin-top:3vh;
}

.hero-card::before{
    content:"";
    position:absolute;
    width:500px;
    height:500px;
    border-radius:50%;
    background:rgba(158,197,254,.18);
    top:-260px;
    right:-220px;
}

.hero-card::after{
    content:"";
    position:absolute;
    width:260px;
    height:260px;
    border-radius:50%;
    background:rgba(10,88,202,.05);
    bottom:-120px;
    left:-120px;
}

/* ======================================
   BADGE
====================================== */

.top-tag{
    position:relative;
    z-index:2;
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:10px 18px;
    border-radius:50px;
    background:#edf5ff;
    color:var(--primary);
    font-weight:700;
    margin-bottom:26px;
}

.top-tag span{
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--primary);
}

/* ======================================
   TITLE
====================================== */

.main-title{
    position:relative;
    z-index:2;
    line-height:1.2;
    font-weight:600;
    letter-spacing:-2px;
    margin-bottom:28px;
}

.main-title em{
    font-style:normal;
    background:linear-gradient(90deg,var(--primary),#3d8bfd);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

.hero-desc{
    position:relative;
    z-index:2;
    font-size:17px;
    line-height:2;
    color:var(--desc);
    margin-bottom:38px;
}

/* ======================================
   INFO PANEL
====================================== */

.info-panel{
    position:relative;
    z-index:2;
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:18px;
}

.info-box{
    background:#fff;
    border-radius:22px;
    border:1px solid rgba(10,88,202,.08);
    padding:28px;
    box-shadow:
    0 8px 25px rgba(10,88,202,.04);
}

.info-num{
    font-size:30px;
    line-height:1;
    font-weight:900;
    color:var(--primary);
    margin-bottom:12px;
}

.info-label{
    color:#475569;
    line-height:1.8;
}

/* ======================================
   SECTION CARD
====================================== */

.section-card{
    background:#fff;
    border-radius:28px;
    border:1px solid rgba(10,88,202,.08);
    padding:38px;
    margin-bottom:26px;
    box-shadow:
    0 8px 30px rgba(10,88,202,.04);
}

.section-title{
    display:flex;
    align-items:center;
    gap:14px;
}

.section-icon{
    width:48px;
    height:48px;
    border-radius:16px;
    background:
    linear-gradient(135deg,var(--primary),#3d8bfd);
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:20px;
    box-shadow:
    0 10px 24px rgba(10,88,202,.16);
}

.section-title h2{
    margin:0;
    font-size:32px;
    font-weight:900;
}

/* 标签 */
.detail-label-group{
    display:flex;
    gap:14px;
    margin-bottom:30px;
}

.detail-label-group span{
  font-size: 12px;
  display:inline-block;
  padding: 5px 15px;
  border-radius: 55px;
  background: #cfe2ff;
  color: #0d6efd;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.detail-label-group span:nth-child(2){
  background: #f0fdf4;
  color: #22c55e
}
.detail-label-group span:nth-child(3){
  background: #fff7ed;
  color: #f59e0b
}
/* ======================================
   INTRO
====================================== */

.intro-box{
    padding:30px;
    border-radius:24px;
    background:
    linear-gradient(135deg,#f8fbff 0%,#ffffff 100%);
    border:1px solid var(--border);
    line-height:2;
    color:#475569;
    font-size:16px;
}

/* ======================================
   CHALLENGE
====================================== */

.challenge-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:22px;
}

.challenge-item{
    position:relative;
    overflow:hidden;
    background:
    linear-gradient(135deg,#ffffff 0%,#f9fbff 100%);
    border-radius:24px;
    border:1px solid rgba(10,88,202,.08);
    padding:30px;
    transition:.35s;
}

.challenge-item:hover{
    transform:translateY(-6px);
    box-shadow:
    0 18px 35px rgba(10,88,202,.08);
}

.challenge-item::before{
    content:"";
    position:absolute;
    width:140px;
    height:140px;
    border-radius:50%;
    background:rgba(158,197,254,.14);
    top:-60px;
    right:-60px;
}

.challenge-number{
    position:relative;
    z-index:2;
    width:44px;
    height:44px;
    border-radius:14px;
    background:#edf5ff;
    color:var(--primary);
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:900;
    margin-bottom:22px;
}

.challenge-title{
    position:relative;
    z-index:2;
    font-size:22px;
    font-weight:800;
    margin-bottom:18px;
}

.challenge-desc{
    position:relative;
    z-index:2;
    color:#64748b;
    line-height:2;
    font-size:15px;
}

/* ======================================
   SOLUTION
====================================== */

.solution-list{
    display:flex;
    flex-direction:column;
    gap:20px;
}

.solution-item{
    display:flex;
    gap:22px;
    padding:24px;
    border-radius:22px;
    border:1px solid rgba(10,88,202,.08);
    background:
    linear-gradient(135deg,#ffffff,#f9fbff);
}

.solution-icon{
    width:58px;
    height:58px;
    flex-shrink:0;
    border-radius:18px;
    background:#edf5ff;
    color:var(--primary);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:24px;
}

.solution-content h4{
    font-size:22px;
    font-weight:800;
    margin-bottom:14px;
}

.solution-content p{
    margin:0;
    color:#64748b;
    line-height:2;
}

/* ======================================
   RESULT
====================================== */

.result-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}

.result-card{
    position:relative;
    overflow:hidden;
    padding:34px 28px;
    border-radius:24px;
    background:
    linear-gradient(135deg,#ffffff,#f9fbff);
    border:1px solid rgba(10,88,202,.08);
}

.result-card::before{
    content:"";
    position:absolute;
    width:120px;
    height:120px;
    border-radius:50%;
    background:rgba(158,197,254,.16);
    top:-50px;
    right:-40px;
}

.result-value{
    position:relative;
    z-index:2;
    font-size:28px;
    line-height:1;
    font-weight:900;
    color:var(--primary);
    margin-bottom:18px;
}

.result-label{
    position:relative;
    z-index:2;
    color:#475569;
    line-height:1.9;
}

/* ======================================
   CTA
====================================== */

.cta-box{
    position:relative;
    overflow:hidden;
    border-radius:30px;
    padding:48px;
    background:
    linear-gradient(135deg,#0a58ca 0%,#3d8bfd 100%);
    color:#fff;
}

.cta-box::before{
    content:"";
    position:absolute;
    width:420px;
    height:420px;
    border-radius:50%;
    background:rgba(255,255,255,.08);
    right:-180px;
    top:-180px;
}

.cta-title{
    position:relative;
    z-index:2;
    font-size:42px;
    font-weight:900;
    margin-bottom:18px;
}

.cta-desc{
    position:relative;
    z-index:2;
    font-size:16px;
    line-height:2;
    color:rgba(255,255,255,.86);
    max-width:760px;
    margin-bottom:28px;
}

.cta-btn{
    position:relative;
    z-index:2;
    height:58px;
    padding:0 34px;
    border:none;
    border-radius:18px;
    background:#fff;
    color:var(--primary);
    font-weight:800;
    transition:.3s;
}

.cta-btn:hover{
    transform:translateY(-3px);
}

/* ======================================
   RESPONSIVE
====================================== */

@media(max-width:1200px){

    .challenge-grid,
    .result-grid{
        grid-template-columns:repeat(2,1fr);
    }

}

@media(max-width:991px){

    .main-title{
        font-size:42px;
    }

    .info-panel{
        grid-template-columns:1fr;
    }

    .challenge-grid{
        grid-template-columns:1fr;
    }

    .result-grid{
        grid-template-columns:1fr 1fr;
    }

}

@media(max-width:768px){

    .case-page{
        padding:25px 0 70px;
    }

    .hero-card,
    .section-card{
        padding:24px;
        border-radius:22px;
    }

    .main-title{
        font-size:34px;
        line-height:1.35;
    }

    .section-title h2{
        font-size:26px;
    }

    .solution-item{
        flex-direction:column;
    }

    .result-grid{
        grid-template-columns:1fr;
    }

    .cta-box{
        padding:30px;
    }

    .cta-title{
        font-size:30px;
    }

}