:root{--purple:#6500ac;--text:#222;--gray:#555;--line:#9fa0a0;--black:#000000;}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;padding:0;font-family:"PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;color:var(--text);background:#fff;-webkit-font-smoothing:antialiased;}
a{text-decoration:none;color:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1, h2, h3, h4, h5, p{margin:0;}
/* 内容栏：设计稿 950px */
.nwrap{max-width:1670px;margin:0 auto;}
/* ===== 占位框（图片 / 图标 / 二维码替换处） ===== */
/* .img-slot{display:flex;align-items:center;justify-content:center;border:1px dashed #c9c9c9;color:#b5b5b5;font-size:12px;background:transparent;
} */
/* ===== 右侧固定页内导航（桌面端） ===== */
.side-nav{position:fixed;right:90px;top:330px;z-index:50;display:flex;flex-direction:column;gap:13px;}
.side-nav a{display:flex;align-items:center;justify-content:flex-end;gap:20px;font-size:16px;line-height:30px;color:#9fa0a0;transition:color .35s ease;cursor:pointer;}
.side-nav em{font-style:normal;}
.side-nav a i{width:14px;height:14px;border:2px solid currentColor;border-radius:50%;transition:width .35s cubic-bezier(.4,0,.2,1),height .35s cubic-bezier(.4,0,.2,1),border-color .35s ease,box-shadow .35s ease;}
.side-nav a.active{color:#333;}
.side-nav a.active i{width:18px;height:18px;border-color:#6500ac;}
/* 暗色背景反色（如 .works 紫底） */
.side-nav.on-dark a{color:rgba(255,255,255,.5);}
.side-nav.on-dark a.active{color:#fff;}
.side-nav.on-dark a.active i{border-color:#fff;box-shadow:0 0 0 4px rgba(255,255,255,.2);}
/* ===== 面包屑 / 页首 ===== */
.nlocation{padding-top:85px;font-size:16px;color:#9fa0a0;}
.page-tag{font-size:36px;font-weight:700;margin-top:120px;}
.ntitle{width:100%;font-size:80px;line-height:1.2;font-weight:400;letter-spacing:1px;color:var(--purple);margin-top:100px;}
.ntitle .br-m{display:none;}
.desc{font-size:36px;line-height:1.75;color:var(--black);font-weight:lighter;margin-top:20px;white-space:pre-wrap;}
.sub-title{font-size:24px;font-weight:700;margin:44px 0 14px;color:var(--black);}
.line{height:1px;background:var(--black);margin:30px 0;width:50px;}
.service-list li{position:relative;padding-left:24px;font-size:24px;color:var(--black);line-height:1.75;margin-bottom:7px;font-weight:lighter;}
.service-list li::before{content:'';position:absolute;left:2px;top:16px;width:10px;height:10px;border-radius:50%;background:#222;}
/* ===== 小节标题 ===== */
.section{margin-top:215px;}
#client{margin-top:220px;}
.sec-head{font-size:36px;font-weight:700;line-height:1;overflow:hidden;}
.sec-line{width:100%;height:1px;background:var(--line);margin-top:96px;}
/* ===== 价值点（桌面：三列，列宽按设计稿 202/272/257） ===== */
.adv-grid{display:flex;justify-content:space-between;margin-top:90px;padding-bottom:80px;gap:20px;}
/* .adv-item{width:calc(33.33% - 20px);} */
/* .adv-item:nth-child(1){width:202px;}
.adv-item:nth-child(2){width:272px;}
.adv-item:nth-child(3){width:257px;} */
.adv-icon{width:150px;height:150px;background:var(--purple);display:flex;align-items:center;justify-content:center;margin-bottom:28px;}
.adv-item h4{font-size:24px;color:var(--black);margin-bottom:12px;line-height:1.75;}
.adv-item p, .adv-item ul{font-size:24px;line-height:1.75;color:var(--black);font-weight:lighter;}
.adv-item ul li{position:relative;padding-left:20px;}
.adv-item ul li::before{content:'•';position:absolute;left:0;font-size:40px;line-height:1;}
.client-rows{width:100%;}
/* ===== 价值点（移动：选项卡 + 轮播） ===== */
.adv-carousel{display:none;}
.adv-tabs{display:flex;}
.adv-tabs button{border:0;background:none;cursor:pointer;font-size:14px;color:#c9c9c9;padding:0 16px;position:relative;font-family:inherit;}
.adv-tabs button:first-child{padding-left:0;}
.adv-tabs button + button{border-left:1px solid #e8e8e8;}
.adv-tabs button.active{color:#222;font-weight:700;}
.adv-tabs button.active::after{content:'';position:absolute;left:16px;right:16px;bottom:-8px;height:2px;background:#222;}
.adv-tabs button:first-child.active::after{left:0;}
.adv-stage-wrap{position:relative;margin:30px 14px 0;}
.adv-stage{position:relative;background:var(--purple);height:262px;display:grid;grid-template-areas:"stack";overflow:hidden;touch-action:pan-y;user-select:none;-webkit-user-select:none;}
.adv-slide{grid-area:stack;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;z-index:1;will-change:transform,opacity;}
.adv-slide.active{opacity:1;pointer-events:auto;z-index:3;}
.adv-slide img{max-width:100%;max-height:100%;display:block;object-fit:contain;}
.adv-slide .img-slot{width:120px;height:120px;border-color:rgba(255,255,255,.6);color:transparent;}
.adv-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:90px;height:90px;border-radius:50%;border:0;background:#fff;color:#666;font-size:45px;line-height:1;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.15);font-weight:lighter;}
.adv-arrow.prev{left:-45px;}
.adv-arrow.next{right:-45px;}
.adv-caption{font-size:13px;color:#333;margin-top:16px;transition:opacity .3s ease;}
/* CSS3 切换动画 */
@keyframes adv-in-right{from{transform:translateX(100%);}to{transform:translateX(0);}}
@keyframes adv-in-left{from{transform:translateX(-100%);}to{transform:translateX(0);}}
@keyframes adv-out-left{from{transform:translateX(0);opacity:1;}to{transform:translateX(-100%);opacity:0;}}
@keyframes adv-out-right{from{transform:translateX(0);opacity:1;}to{transform:translateX(100%);opacity:0;}}
@keyframes adv-fade-in{from{opacity:0;}to{opacity:1;}}
.adv-slide.in-right{animation:adv-in-right .6s ease both;}
.adv-slide.in-left{animation:adv-in-left .6s ease both;}
.adv-slide.out-left{animation:adv-out-left .6s ease both;z-index:2;opacity:1;}
.adv-slide.out-right{animation:adv-out-right .6s ease both;z-index:2;opacity:1;}
.adv-caption.fading{opacity:0;}
/* ===== 客户（桌面：3 行，3/4/4 个） ===== */
.client-panel{margin-top:98px;}
.client-panel img{max-width:100%;}
/* ===== 紫色作品区 ===== */
.works{background:var(--purple);color:#fff;margin-top:185px;padding:96px 24px 60px;}
.works-inner{max-width:998px;margin:0 auto;}
.works-head{display:none;font-size:15px;font-weight:700;margin-bottom:44px;}
.works-slogan{text-align:center;}
.works-slogan .en{font-size:80px;font-weight:lighter;line-height:1;}
.works-slogan .slash{font-size:80px;font-weight:lighter;line-height:1;margin:12px 0 30px;}
.works-slogan .cn{font-size:80px;font-weight:lighter;line-height:1.2;}
.works-qr{text-align:center;margin-top:66px;}
.works-qr h5{font-size:36px;;}
.works-qr p{font-size:30px;font-weight:lighter;margin-top:12px;}
/* .works-qr .tri{width:0;height:0;border:12px solid transparent;border-top-color:#fff;margin:22px auto 24px;} */
.works-qr .tri{font-size:36px;line-height:1;margin:20px auto 22px;}
.qr-card{width:325px;height:325px;margin:0 auto;display:flex;align-items:center;justify-content:center;}
.qr-card img{max-width:100%;}
/* ===== 联系我们 ===== */
.contact{padding:60px 0 140px;}
.contact-title{font-size:30px;font-weight:lighter;text-align:center;}
.contact-line{width:100%;height:1px;background:var(--line);margin-top:40px;}
.contact-row{display:flex;align-items:center;justify-content:center;gap:80px;margin:40px 0;}
.c-wechat{display:flex;align-items:center;gap:18px;}
.c-label{font-size:30px;color:var(--black);font-weight:lighter;}
.qr-small{width:200px;height:200px;background:#fff;}
.c-divider{width:1px;height:100px;background:var(--line);}
.c-tel{display:flex;align-items:center;gap:16px;text-align:left;}
.c-tel strong{font-size:60px;line-height:1.2;letter-spacing:1px;font-weight:normal;color:var(--black);}
.contact-col{display:none;}
.c-circle{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;}
/* .c-circle.purple{background:var(--purple);} */
/* .c-circle.green{background:#2fbf62;} */
.c-circle .img-slot{width:24px;height:24px;border-radius:50%;border-color:rgba(255,255,255,.7);color:transparent;}
.c-num{font-size:18px;font-weight:700;letter-spacing:1px;}
.npc{display:inline-block;}
.nwap{display:none;}
@media (max-width:1675px) {
    .nwrap{width:96%}
    .side-nav{right:30px;}
}
@media (max-width:1200px){
    .side-nav{display:none;}
}
@media (max-width:1100px){
    .adv-grid{gap:40px;}
}
@media (max-width:1000px){
    .nwrap{width:100%;padding:0 8%;}
    .npc{display:none !important;}
    .nwap{display:inline-block !important;}
    .nlocation{padding-top:155px;font-size:32px;}
    .page-tag{font-size:42px;margin-top:138px;}
    .ntitle{background:var(--purple);color:#fff;font-size:95px;letter-spacing:0;padding:30px 20px;margin-top:60px;}
    .ntitle .br-m{display:inline;}
    .desc{font-size:42px;line-height:1.5;margin-top:60px;}
    .sub-title{font-size:36px;margin:50px 0 12px;}
    .service-list li{font-size:36px;line-height:1.4;margin-bottom:5px;}
    .section{margin-top:56px;}
    #client{margin-top:75px;}
    .sec-head{font-size:42px;}
    .sec-line{margin-top:16px;}
    .adv-line{width:100%;background:var(--black);margin:90px 0 100px;}
    .adv-grid{display:none;}
    .adv-carousel{display:block;}
    .adv-stage-wrap{margin:0;}
    .adv-stage{height:auto;margin:0;}
    .client-panel{margin-top:70px;}
    .client-panel img{width:100%;}
    .service-list li{padding-left:30px;}
    .service-list li::before{width:16px;height:16px;top:18px;}
    .adv-tabs{align-items:center;margin:74px 0 60px;}
    .adv-tabs button{font-size:14px;padding:0 14px;}
    .adv-tabs button{color:#c9caca !important;font-size:48px;font-weight:normal;padding:0;}
    .adv-tabs button span{color:#010101 !important;}
    .adv-tabs button.active{font-weight:normal;}
    .adv-tabs button.active::after{background:none;}
    .adv-tabs button.active span{border-bottom:4px solid #222;padding-bottom:10px;}
    .adv-tabs button + button{border:0;}
    .adv-tabs .mline{width:1px;height:48px;background:var(--black);}
    .adv-tabs{justify-content:space-between;}
    .adv-caption{font-size:36px;font-weight:lighter;line-height:2;min-height:1.4em;}
    .works{margin-top:145px;padding:115px 8% 125px;}
    .works-inner{max-width:none;}
    .works-head{display:block;font-size:42px;margin-bottom:240px;}
    .works-slogan{text-align:left;}
    .works-slogan .en{font-size:95px;}
    .works-slogan .slash{font-size:95px;margin:10px 0 30px;}
    .works-slogan .cn{font-size:95px;}
    .works-qr{margin-top:140px;text-align:left;}
    .works-qr h5{font-size:42px;font-weight:normal;}
    .works-qr p{font-size:42px;font-weight:lighter;margin-top:8px;}
    /* .works-qr .tri{margin:14px 0 10px;border-width:16px;} */
    .works-qr .tri{margin:12px 0 18px;font-size:42px;}
    .qr-card{width:100%;height:auto;justify-content:flex-start;}
    .qr-card img{width:50%;}
    .qr-card span{width:78px;height:78px;}
    .contact{padding:215px 0 110px;}
    .contact-title{font-size:36px;}
    .contact-line{margin-top:14px;}
    .contact-row{display:none;}
    .contact-col{display:flex;flex-direction:column;align-items:center;gap:20px;margin-top:90px;}
    .qr-small{width:26%;height:auto;text-align:center;margin-top:20px;}
    .qr-small img{max-width:100%;}
    .c-circle{width:18%;height:auto;}
    .c-circle img{max-width:100%;}
    .c-num{font-size:60px;font-weight:normal;}
    .contact-line{width:100%;margin-top:70px;}
    .nline{width:120px;height:1px;background:var(--black);margin:60px 0;}
}
/* ===== < 1000px：等比例缩小（基准 1000px，1px = 0.1vw） ===== */
@media (max-width:999px){
    .nlocation{padding-top:15.5vw;font-size:3.2vw;}
    .page-tag{font-size:4.2vw;margin-top:13.8vw;}
    .ntitle{font-size:9.5vw;padding:3vw 2vw;margin-top:6vw;}
    .desc{font-size:4.2vw;margin-top:6vw;}
    .sub-title{font-size:3.6vw;margin:5vw 0 1.2vw;}
    .line{margin:3vw 0;width:5vw;}
    .service-list li{padding-left:3vw;font-size:3.6vw;margin-bottom:0.5vw;}
    .service-list li::before{left:0.2vw;top:1.8vw;width:1.6vw;height:1.6vw;}
    .section{margin-top:5.6vw;}
    #client{margin-top:7.5vw;}
    .sec-head{font-size:4.2vw;}
    .sec-line{margin-top:1.6vw;}
    .adv-line{margin:9vw 0 10vw;}
    .adv-slide .img-slot{width:12vw;height:12vw;}
    .adv-arrow{width:9vw;height:9vw;font-size:4.5vw;}
    .adv-arrow.prev{left:-4.5vw;}
    .adv-arrow.next{right:-4.5vw;}
    .adv-tabs{margin:7.4vw 0 6vw;}
    .adv-tabs button{font-size:4.8vw;}
    .adv-tabs button.active span{border-bottom:0.4vw solid #222;padding-bottom:1vw;}
    .adv-tabs .mline{height:4.8vw;}
    .adv-caption{font-size:3.6vw;margin-top:1.6vw;}
    .client-panel{margin-top:7vw;}
    .works{margin-top:14.5vw;padding:11.5vw 8% 12.5vw;}
    .works-head{font-size:4.2vw;margin-bottom:24vw;}
    .works-slogan .en{font-size:9.5vw;}
    .works-slogan .slash{font-size:9.5vw;margin:1vw 0 3vw;}
    .works-slogan .cn{font-size:9.5vw;}
    .works-qr{margin-top:14vw;}
    .works-qr h5{font-size:4.2vw;}
    .works-qr p{font-size:4.2vw;margin-top:0.8vw;}
    .works-qr .tri{margin:1.2vw 0 1.8vw;font-size:4.2vw;}
    .qr-card span{width:7.8vw;height:7.8vw;}
    .contact{padding:21.5vw 0 11vw;}
    .contact-title{font-size:3.6vw;}
    .contact-line{margin-top:7vw;}
    .contact-col{gap:2vw;margin-top:9vw;}
    .qr-small{margin-top:2vw;}
    .c-num{font-size:6vw;}
    .nline{width:12vw;margin:6vw 0;}
}