/* ========= 全局 ============== */
section{
    position:relative;
}
.container{
    max-width:1200px;
}
/* ========================= Hero ========================= */
.solution-hero{
    padding:180px 0;
    background:
    linear-gradient(
        135deg,
        #edf7ff,
        #ffffff
    );
    overflow:hidden;
}
.hero-layout{
    display:flex;
    align-items:center;
    justify-content:space-between;
}
.hero-text{
    width:50%;
}
.hero-text span{
    color:#1677ff;
    font-size:14px;
    font-weight:700;
    letter-spacing:6px;
}
.hero-text h1{
    margin-top:25px;
    font-size:52px;
    line-height:1.3;
    font-weight:800;
    white-space:nowrap;
    color:#0f172a;
}
.hero-text p{
    margin-top:25px;
    max-width:520px;
    font-size:18px;
    line-height:1.9;
    color:#64748b;
}
.hero-text a{
    display:inline-block;
    margin-top:35px;
    padding:14px 38px;
    background:#1677ff;
    color:white;
    border-radius:30px;
    font-size:16px;
    transition:.3s;
}
.hero-text a:hover{
    transform:translateY(-4px);
    box-shadow:
    0 15px 30px rgba(22,119,255,.3);
}

/* ========================= 数字工厂视觉 ========================= */
.digital-visual{
    width:430px;
    height:430px;
    position:relative;
}

.digital-visual::before{
    content:"";
    position:absolute;
    width:270px;
    height:270px;
    border-radius:50%;
    border:1px dashed #bfdbfe;
    top:80px;
    left:80px;
    animation:rotate 20s linear infinite;
}

@keyframes rotate{
    from{
        transform:rotate(0deg);
    }
    to{
        transform:rotate(360deg);
    }
}
.circle-main{
    width:160px;
    height:160px;
    position:absolute;
    top:135px;
    left:135px;
    background:
    linear-gradient(
        135deg,
        #1677ff,
        #60a5fa
    );
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    color:white;
    font-weight:800;
    font-size:18px;
    box-shadow:
    0 25px 60px rgba(22,119,255,.35);
}
.node{
    position:absolute;
    width:90px;
    height:90px;
    background:white;
    border-radius:20px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:18px;
    font-weight:700;
    color:#0f172a;
    border:1px solid #dbeafe;
    box-shadow:
    0 10px 30px rgba(15,23,42,.08);
    cursor:pointer;
    transition:.35s;
}
.node:hover{
    transform:
    translateY(-10px)
    scale(1.08);
    border-color:#1677ff;
    box-shadow:
    0 20px 45px rgba(22,119,255,.25);
}
.node-1{
    top:20px;
    left:170px;
}
.node-2{
    top:160px;
    right:0;
}
.node-3{
    bottom:20px;
    left:170px;
}
.node-4{
    top:160px;
    left:0;
}
.node-5{
    top:55px;
    right:40px;
}

/* =========================标题======================== */
.section-title{
    text-align:center;
    max-width:800px;
    margin:0 auto 60px;
}
.section-title span{
    color:#1677ff;
    letter-spacing:5px;
    font-size:13px;
    font-weight:700;
}
.section-title h2{
    margin-top:20px;
    font-size:38px;
    font-weight:800;
    color:#0f172a;
}
.section-title p{
    margin-top:20px;
    color:#64748b;
    line-height:1.8;
}

/* =========================数字化闭环========================= */

.digital-loop{
    padding:50px 0;
}
.loop-box{
    display:flex;
    justify-content:center;
    align-items:center;
}
.loop-box div{
    width:170px;
    padding:35px 20px;
    text-align:center;
    background:#f8fafc;
    margin:0 10px;
    border-radius:18px;
    font-size:18px;
    font-weight:700;
    color:#334155;
    cursor:pointer;
    transition:.35s;
}
.loop-box div:hover{
    background:#1677ff;
    color:white;
    transform:
    translateY(-15px);
}
.loop-box .active{
    background:#1677ff;
    color:white;
    transform:translateY(-15px);
}

/* =========================平台体系========================= */
.platform{
    padding:50px 0;
    background:#f8fbff;
}
.platform-layout{
    display:flex;
    gap:60px;
}
.platform-menu{
    width:260px;
}
.platform-menu div{
    padding:22px 25px;
    margin-bottom:15px;
    background:white;
    border-radius:12px;
    color:#475569;
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}
.platform-menu div:hover{
    transform:translateX(8px);
    color:#1677ff;
}
.platform-menu div.active{
    background:#1677ff;
    color:white !important;
}
.platform-menu div.active *{
    color:white !important;
}
.platform-content{
    flex:1;
    background:white;
    padding:55px;
    border-radius:25px;
    position:relative;
    overflow:hidden;
}
.bg-word{
    position:absolute;
    right:40px;
    bottom:30px;
    font-size:90px;
    font-weight:900;
    letter-spacing:5px;
    color:rgba(22,119,255,.05);
    pointer-events:none;
}
.platform-content{
    position:relative;
    overflow:hidden;
}
.platform-content h3{
    font-size:32px;
    color:#0f172a;
}
.platform-content p{
    margin-top:25px;
    font-size:18px;
    line-height:1.9;
    color:#64748b;
}
.platform-content li{
    margin-bottom:15px;
    color:#334155;
}
.platform-content{
    position:relative;
    overflow:hidden;
    border-radius:32px;
    min-height:520px;
}
/* 整张覆盖 */
.product-bg{
    position:absolute;
    inset:0;
    width:100%;
    height:100%;
    object-fit:cover;
    opacity:.08;
    z-index:0;
}

/* 上面的白色遮罩，让文字可读 */
.content-mask{
    position:relative;
    z-index:1;
    height:100%;
    padding:60px;
    background:
    rgba(255,255,255,.75);
}
/* 价值 */
.value-section{
    padding:50px 0;
}
.value-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:40px;
}
.value-grid div{
    padding:40px;
    background:white;
    border:1px solid #e5edf8;
    border-radius:20px;
    transition:.35s;
}
.value-grid div:hover{
    transform:translateY(-10px);
    box-shadow:
    0 20px 40px rgba(0,0,0,.08);
}
.value-grid h3{
    font-size:48px;
    color:#1677ff;
}
/* 工业AI智能体 */
.ai-section{
    margin:100px auto;
    padding:80px 60px;

    border-radius:40px;

    background:
    linear-gradient(
        135deg,
        #f0f7ff,
        #ffffff
    );

    box-shadow:
    0 20px 60px rgba(0,80,255,.12);
}
.ai-section::before{
    content:"";
    position:absolute;

    width:400px;
    height:400px;

    background:#1677ff;

    opacity:.08;

    filter:blur(80px);

    border-radius:50%;
}
.ai-area{
    padding:60px 0;
    background:
    linear-gradient(
        135deg,
        #f5f9ff,
        #ffffff
    );
    background:
    radial-gradient(
    circle at center,
    rgba(0,120,255,.08),
    transparent 30%
    );
}
.ai-inner{
    text-align:center;
}
.ai-inner > span{
    display:inline-block;
    padding:8px 22px;
    border-radius:30px;
    background:#eaf3ff;
    color:#1677ff;
    font-size:14px;
    letter-spacing:5px;
}
.ai-inner h2{
    margin-top:25px;
    font-size:42px;
    font-weight:700;
    color:#101828;
}
.ai-inner p{
    max-width:760px;
    margin:20px auto 60px;
    color:#667085;
    line-height:2;
    font-size:16px;
}

/* AI 卡片 */
.ai-items{
    display:grid;
    grid-template-columns:
    repeat(4,1fr);
    gap:25px;
}
.ai-card{
    background:white;
    border-radius:24px;
    padding:35px 28px;
    text-align:left;
    min-height:220px;
    border:1px solid #edf2f7;
    transition:.35s;
    box-shadow:
    0 10px 30px rgba(0,0,0,.05);
}
.ai-card:hover{
    transform:translateY(-10px);
    box-shadow:
    0 20px 50px rgba(0,0,0,.08);
}
.ai-card h3{
    font-size:22px;
    margin-bottom:20px;
    color:#101828;
}
.ai-card p{
    margin:0;
    font-size:15px;
    color:#667085;
    line-height:1.8;
}
/* =============================== 项目流程 ================================= */
.case-process {
    padding:60px 0;
    background:#f8fbff;
    color:#111827;
}
.case-process h2 {
    text-align:center;
    font-size:36px;
    margin-bottom:70px;
}
.process-line {
    display:flex;
    justify-content:space-between;
    text-align:center;
}
.process-line div {
    color:#006cff;
    font-size:18px;
    line-height:2;
    position:relative;
}
.process-line div:first-line {
    font-size:34px;
    font-weight:700;
}

/* 响应式 */
@media(max-width:992px){
    .hero-layout{
        flex-direction:column;
    }
    .hero-text{
        width:100%;
    }
    .digital-visual{
        margin-top:60px;
    }
    .platform-layout{
        flex-direction:column;
    }
    .value-grid{
        grid-template-columns:1fr;
    }
    .ai-items{
        flex-direction:column;
    }
    .loop-box,
    .process-list{
        flex-wrap:wrap;
    }
}