/* ===== 智能硬件整套方案遮罩 · 高级感重设计（smart2.css） =====
   编写本文件时 zll.css 正被其他会话改动未提交，为避免混提交独立放置，
   在 zll.css / zll_mobile.css 之后加载。zll.css 中旧的 .smart-banner /
   .smart-feat 基础规则继续生效，本文件只叠加新版结构（smart-line /
   smart-stats / smart-why / smart-steps）的样式。
   待 zll.css 空闲后可合并回去并删除本文件与对应 <link>。

   设计语言：深空蓝黑底 + 科技蓝强调（#6f9aee 系），大编号衬线体、
   细分隔线、数据条、卡片微光——"研发实验室/科技发布会"质感，
   呼应整站深色遮罩体系。 */

/* ---------- 产品线板块容器：整块一张大卡 ---------- */
.smart-nav .smart-line{
    position: relative;
    margin-top: 64px;
    padding: 40px 44px 36px;
    border: 1px solid rgba(111,154,238,.16);
    border-radius: 8px;
    background:
        radial-gradient(120% 80% at 100% 0%, rgba(111,154,238,.07) 0%, rgba(111,154,238,0) 55%),
        rgba(255,255,255,.02);
}
/* 左侧竖向渐变亮条：三张卡统一的"能量边" */
.smart-nav .smart-line:before{
    content: "";
    position: absolute;
    left: 0;
    top: 28px;
    bottom: 28px;
    width: 3px;
    border-radius: 3px;
    background: linear-gradient(180deg, rgba(111,154,238,0), #6f9aee 30%, #4c74c5 70%, rgba(76,116,197,0));
}

/* ---------- 编号标题头：大号衬线编号 + 标题 + 副题 ---------- */
.smart-nav .smart-line-head{
    display: flex;
    align-items: flex-start;
    gap: 26px;
    margin-bottom: 30px;
}
.smart-nav .sl-num{
    flex: none;
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
    font-size: 52px;
    line-height: 1;
    color: transparent;
    background: linear-gradient(180deg, #8fb0f0, rgba(111,154,238,.25));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
    padding-top: 2px;
}
.smart-nav .smart-line-head h3{
    font-size: 30px;
    font-weight: normal;
    letter-spacing: 2px;
    color: #fff;
}
.smart-nav .smart-line-head p{
    margin-top: 10px;
    font-size: 15px;
    line-height: 24px;
    color: rgba(255,255,255,.6);
}
/* 板块内横幅与特性网格间距收紧（头移进卡片后避免双重留白） */
.smart-nav .smart-line .smart-banner{
    margin-bottom: 22px;
}
.smart-nav .smart-line .smart-feat li{
    background: rgba(255,255,255,.03);
    border-color: rgba(255,255,255,.08);
}
.smart-nav .smart-line .smart-feat li:hover{
    border-color: rgba(111,154,238,.45);
    background: rgba(111,154,238,.06);
}

/* ---------- 数据条：三格竖线分隔 ---------- */
.smart-nav .smart-stats{
    display: flex;
    margin-top: 26px;
    padding: 22px 8px 4px;
    border-top: 1px solid rgba(255,255,255,.09);
}
.smart-nav .smart-stats span{
    flex: 1;
    text-align: center;
}
.smart-nav .smart-stats span + span{
    border-left: 1px solid rgba(255,255,255,.09);
}
.smart-nav .smart-stats b{
    display: block;
    font-size: 28px;
    font-weight: normal;
    font-family: Georgia, "Times New Roman", serif;
    color: #8fb0f0;
    letter-spacing: 1px;
}
.smart-nav .smart-stats i{
    display: block;
    margin-top: 8px;
    font-style: normal;
    font-size: 13px;
    color: rgba(255,255,255,.5);
    letter-spacing: 1px;
}

/* ---------- 为什么选择我们：四格优势 ---------- */
.smart-nav .smart-why{
    margin-top: 70px;
}
.smart-nav .smart-why-list{
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
    padding: 0;
    list-style: none;
}
.smart-nav .smart-why-list li{
    flex: 1 1 calc(25% - 22px);
    min-width: 240px;
    padding: 30px 26px;
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 6px;
    background: rgba(255,255,255,.03);
    transition: border-color .3s, background .3s, transform .3s;
}
.smart-nav .smart-why-list li:hover{
    border-color: rgba(111,154,238,.45);
    background: rgba(111,154,238,.06);
    transform: translateY(-3px);
}
.smart-nav .smart-why-list b{
    display: block;
    font-size: 19px;
    font-weight: normal;
    color: #fff;
    letter-spacing: 1px;
    padding-bottom: 14px;
    margin-bottom: 14px;
    border-bottom: 1px solid rgba(111,154,238,.25);
    position: relative;
}
.smart-nav .smart-why-list b:after{
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 34px;
    height: 1px;
    background: #6f9aee;
}
.smart-nav .smart-why-list p{
    margin: 0;
    font-size: 14px;
    line-height: 25px;
    color: rgba(255,255,255,.62);
}

/* ---------- 五步合作流程：沿用 sv-steps 但加分隔箭头 ---------- */
.smart-nav .smart-steps{
    margin-top: 70px;
}
.smart-nav .smart-steps .sv-steps li{
    background: rgba(255,255,255,.03);
    border-color: rgba(255,255,255,.08);
}
.smart-nav .smart-steps .sv-num{
    background: linear-gradient(135deg, #8fb0f0, #4c74c5);
    color: #0b1220;
    font-weight: bold;
}

/* ---------- 窄屏适配 ---------- */
@media screen and (max-width:768px){
    .smart-nav .smart-line{
        margin-top: 44px;
        padding: 26px 18px 24px;
    }
    .smart-nav .smart-line-head{
        flex-direction: column;
        gap: 10px;
        margin-bottom: 22px;
    }
    .smart-nav .sl-num{
        font-size: 40px;
    }
    .smart-nav .smart-line-head h3{
        font-size: 24px;
    }
    .smart-nav .smart-line-head p{
        font-size: 14px;
    }
    .smart-nav .smart-stats{
        flex-wrap: wrap;
        gap: 16px 0;
        padding-top: 16px;
    }
    .smart-nav .smart-stats span{
        flex: 1 1 100%;
        text-align: left;
        padding-left: 12px;
        position: relative;
    }
    .smart-nav .smart-stats span + span{
        border-left: none;
    }
    .smart-nav .smart-stats span:before{
        content: "";
        position: absolute;
        left: 0;
        top: 6px;
        bottom: 6px;
        width: 2px;
        background: #6f9aee;
        border-radius: 2px;
    }
    .smart-nav .smart-stats b{
        font-size: 22px;
        display: inline;
        margin-right: 10px;
    }
    .smart-nav .smart-stats i{
        display: inline;
        margin-top: 0;
        font-size: 13px;
    }
    .smart-nav .smart-why{
        margin-top: 44px;
    }
    .smart-nav .smart-why-list li{
        flex: 1 1 100%;
        padding: 22px 20px;
    }
    .smart-nav .smart-steps{
        margin-top: 44px;
    }
}