:root{--deep:#0d2e5e;--navy:#225bb2;--navy2:#1a4791;--ink:#122447;--orange:#fe6a00;--orange2:#e85f00;--bg:#ffffff;--soft:#f4f7fc;--tint:#e9f0fa;--line:#e2e9f3;--txt:#41506b;--mut:#6e80a0;--rad:16px;--sh:0 10px 30px rgba(13,46,94,.08);--sh2:0 22px 56px rgba(13,46,94,.16);--grad:linear-gradient(135deg,#0d2e5e 0%,#225bb2 100%);--ograd:linear-gradient(135deg,#fe6a00 0%,#ff8f3a 100%)}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--txt);background:var(--bg);line-height:1.75;font-size:16px;padding-top:120px;overflow-x:hidden}
img{max-width:100%;border:0;vertical-align:middle}
a{color:var(--navy);text-decoration:none;transition:color .25s}
a:hover{color:var(--orange)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0}
.wrap{max-width:1400px;margin:0 auto;padding:0 32px}
/* 滚动渐显（渐进增强：仅body.rvon时隐藏待显元素，JS失效则内容全部可见） */
body.rvon .rv{opacity:0;transform:translateY(42px);transition:opacity .9s cubic-bezier(.22,.8,.36,1),transform .9s cubic-bezier(.22,.8,.36,1)}
body.rvon .rv.in{opacity:1;transform:translateY(0)}
.rvd1{transition-delay:.12s}.rvd2{transition-delay:.24s}.rvd3{transition-delay:.36s}.rvd4{transition-delay:.48s}
/* ===== 顶部条 ===== */
.topbar{background:var(--deep);color:#c9d8f2;font-size:13px;position:fixed;top:0;left:0;right:0;z-index:60;height:38px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px}
.topbar a{color:#e6efff;margin-left:22px}
.topbar a:hover{color:#ffcaa2}
/* ===== 导航 ===== */
.navbar{position:fixed;top:38px;left:0;right:0;z-index:55;background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--line);height:82px}
.navbar .wrap{display:flex;align-items:center;height:82px;gap:34px}
.logo{display:flex;align-items:center;flex-shrink:0}
.logo img{height:54px}
.menu{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.menu>li{position:relative}
.menu>li>a{display:block;position:relative;padding:14px 19px;font-size:17px;font-weight:600;color:var(--ink);white-space:nowrap;letter-spacing:.5px}
.menu>li>a::after{content:"";position:absolute;left:50%;bottom:6px;width:0;height:3px;border-radius:2px;background:var(--ograd);transition:all .3s;transform:translateX(-50%)}
.menu>li>a:hover{color:var(--navy)}
.menu>li>a:hover::after{width:60%}
.dropdown{position:absolute;top:100%;left:50%;transform:translate(-50%,10px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh2);padding:14px;min-width:450px;display:grid;grid-template-columns:1fr 1fr;gap:3px;opacity:0;visibility:hidden;transition:all .3s ease}
.dropdown::before{content:"";position:absolute;top:-7px;left:50%;transform:translateX(-50%) rotate(45deg);width:14px;height:14px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line)}
.menu>li:hover .dropdown,.menu>li:focus-within .dropdown{opacity:1;visibility:visible;transform:translate(-50%,2px)}
.dropdown.w3{min-width:240px;grid-template-columns:1fr}
.dropdown a{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border-radius:9px;font-size:15px;color:var(--txt)}
.dropdown a::after{content:"›";color:#b9c6dc;font-size:15px;transition:all .25s}
.dropdown a:hover{background:var(--tint);color:var(--navy);padding-left:18px}
/* sitande式mega菜单 */
.dropdown.mega{min-width:min(920px,92vw);display:grid;grid-template-columns:270px 1fr;gap:0;padding:0;overflow:hidden;border-radius:16px}
.dropdown.mega::before{display:none}
.dd-side{background-color:#C3C7C8;background-image:url('https://www.yjswushiyi.cn/skin/imgslot/drop-260x200.webp');background-image:image-set(url('https://www.yjswushiyi.cn/skin/imgslot/drop-260x200.avif') type('image/avif'),url('https://www.yjswushiyi.cn/skin/imgslot/drop-260x200.webp') type('image/webp'));background-size:cover;background-position:center;color:#fff;padding:34px 28px;position:relative;overflow:hidden;display:flex;flex-direction:column}
.dd-side::after{content:"";position:absolute;right:-46px;bottom:-46px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.08)}
.dd-side .dds-ic{width:52px;height:52px;border-radius:14px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.dd-side .dds-ic svg{width:27px;height:27px;stroke:#fff;fill:none;stroke-width:1.7}
.dd-side b{font-size:20px;letter-spacing:2px;color:#fff}
.dd-side .dds-en{font-size:11.5px;letter-spacing:3px;color:#a9c6ee;margin-top:6px;text-transform:uppercase}
.dd-side p{font-size:13.5px;color:#cfe0f8;line-height:1.85;margin-top:14px}
.dd-side .dds-all{margin-top:auto;padding-top:20px;font-size:14px;color:#ffb27a;font-weight:600}
.dd-side .dds-all:hover{color:#fff}
.dd-main{display:grid;grid-template-columns:1fr 1fr;gap:2px;padding:18px}
.dd-item{display:block;padding:12px 16px;border-radius:11px;transition:all .25s;position:relative}
.dd-item::after{content:"›";position:absolute;right:16px;top:50%;transform:translateY(-50%);color:#c3d0e4;font-size:16px;opacity:0;transition:all .25s}
.dd-item b{display:block;font-size:15.5px;color:var(--ink);font-weight:600}
.dd-item span{display:block;font-size:12.5px;color:var(--mut);margin-top:3px;line-height:1.6}
.dd-item:hover{background:var(--tint)}
.dd-item:hover::after{opacity:1;right:12px;color:var(--orange)}
.dd-item:hover b{color:var(--navy)}
.dropdown.mega.w1col .dd-main{grid-template-columns:1fr}
.nav-right{display:flex;align-items:center;gap:16px;flex-shrink:0}
.nav-quals{display:flex;align-items:center;gap:7px;padding-left:14px;border-left:1px solid var(--line);flex-shrink:0}
.nav-quals img{height:22px}
.nav-tel{display:flex;flex-direction:column;line-height:1.3;flex-shrink:0;padding-left:14px;border-left:1px solid var(--line)}
.nav-tel b{font-size:20px;color:var(--orange);letter-spacing:.4px;font-variant-numeric:tabular-nums}
.nav-tel span{font-size:11px;color:var(--mut);letter-spacing:1px}
.nav-cta{background:var(--ograd);color:#fff!important;font-size:16px;font-weight:600;padding:13px 30px;border-radius:8px;box-shadow:0 8px 20px rgba(254,106,0,.34);white-space:nowrap;flex-shrink:0;transition:all .3s;letter-spacing:1px}
.nav-cta:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(254,106,0,.44)}
.searchbtn{width:42px;height:42px;border-radius:8px;background:var(--tint);display:flex;align-items:center;justify-content:center;flex-shrink:0;cursor:pointer;transition:all .3s}
.searchbtn:hover{background:#d7e4f7}
.searchbtn svg{width:19px;height:19px;stroke:var(--navy);fill:none;stroke-width:2.2}
.burger{display:none}
/* ===== 搜索弹层 ===== */
.st-layer{display:none}
#wsst:checked ~ .st-layer{display:block}
.st-mask{position:fixed;inset:0;background:rgba(8,18,40,.62);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:90}
.st-panel{position:fixed;top:16vh;left:50%;transform:translateX(-50%);width:min(700px,92vw);background:#fff;border-radius:18px;box-shadow:0 40px 100px rgba(8,18,42,.4);z-index:95;padding:34px 32px 24px;animation:popin .3s ease}
@keyframes popin{from{opacity:0;transform:translateX(-50%) translateY(16px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
.st-panel h3{font-size:18px;color:var(--ink);margin-bottom:16px;letter-spacing:1px}
.st-form{display:flex;gap:12px}
.st-form input[type=text]{flex:1;height:56px;border:2px solid var(--line);border-radius:12px;padding:0 20px;font-size:16px;outline:none;transition:border .25s,box-shadow .25s}
.st-form input[type=text]:focus{border-color:var(--navy);box-shadow:0 0 0 4px rgba(34,91,178,.1)}
.st-form button{height:56px;padding:0 34px;border-radius:12px;background:var(--grad);color:#fff;font-size:16px;font-weight:600;transition:all .3s}
.st-form button:hover{background:var(--navy2)}
.st-hots{margin-top:16px;font-size:13.5px;color:var(--mut);line-height:2.1}
.st-hots a{margin:0 6px;color:var(--txt);background:var(--soft);padding:4px 14px;border-radius:99px;display:inline-block;transition:all .25s}
.st-hots a:hover{color:#fff;background:var(--navy)}
.st-close{position:absolute;top:14px;right:20px;font-size:28px;color:#9aa7bd;cursor:pointer;line-height:1}
.st-close:hover{color:var(--orange)}
.st-toggle{display:none}
/* ===== 移动菜单 ===== */
#wnav,.nav-mask{display:none}
#wnav:checked ~ .wnav-panel{transform:translateX(0)}
#wnav:checked ~ .nav-mask{display:block}
.nav-mask{position:fixed;inset:0;background:rgba(8,18,40,.55);z-index:80}
.wnav-panel{position:fixed;top:0;right:0;bottom:0;width:min(330px,88vw);background:#fff;z-index:85;transform:translateX(105%);transition:transform .35s cubic-bezier(.22,.8,.36,1);overflow-y:auto;padding:18px 18px 40px}
.wnav-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.wnav-head b{font-size:18px;color:var(--ink)}
.wnav-close{font-size:26px;color:#9aa7bd;cursor:pointer}
.wnav-panel .g{border-bottom:1px solid var(--line);padding:6px 0}
.wnav-panel .g>a.t{display:block;font-size:16px;font-weight:600;color:var(--ink);padding:12px 6px}
.wnav-panel .g div a{display:block;font-size:14.5px;color:var(--txt);padding:9px 16px}
.wnav-quals{display:flex;gap:10px;flex-wrap:wrap;padding:18px 6px 6px}
.wnav-quals img{height:26px}
.wnav-cta{display:block;text-align:center;margin:14px 6px 0;background:var(--ograd);color:#fff;font-weight:600;padding:14px;border-radius:12px;font-size:16px;box-shadow:0 8px 18px rgba(254,106,0,.3)}
.wnav-cta.alt{background:var(--grad)}
/* ===== 通用 ===== */
.sec{position:relative;padding:110px 0}
.sec.soft{background:var(--soft)}
.sec.deep{background:var(--deep);color:#dbe7fa}
.sec.deep h2,.sec.deep h3{color:#fff}
.pt0{padding-top:0}
.sechead{max-width:860px;margin:0 auto 70px}
.sechead.center{text-align:center}
.sechead .kicker{display:inline-flex;align-items:center;gap:12px;font-size:13px;letter-spacing:6px;color:var(--navy);text-transform:uppercase;margin-bottom:16px}
.sec.deep .kicker{color:#8fb4ea}
.sechead .kicker::before,.sechead .kicker::after{content:"";width:34px;height:2px;background:var(--ograd)}
.sechead h2,.sechead h1{font-size:clamp(28px,3.4vw,44px);color:var(--ink);letter-spacing:2px;line-height:1.25;font-weight:700}
.sechead p{color:var(--mut);margin-top:16px;font-size:16.5px;letter-spacing:.5px}
.sec.deep .sechead p{color:#a9c3e8}
.btn{display:inline-flex;align-items:center;gap:9px;padding:16px 42px;border-radius:8px;font-size:16.5px;font-weight:600;transition:all .3s;letter-spacing:1px}
.btn-o{background:var(--ograd);color:#fff;box-shadow:0 10px 26px rgba(254,106,0,.34)}
.btn-o:hover{color:#fff;transform:translateY(-3px)}
.btn-b{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(34,91,178,.32)}
.btn-b:hover{color:#fff;transform:translateY(-3px)}
.btn-ghost{border:2px solid rgba(255,255,255,.8);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-dghost{border:2px solid var(--navy);color:var(--navy)}
.btn-dghost:hover{background:var(--navy);color:#fff}
.grid{display:grid;gap:26px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
/* 卡片 */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;box-shadow:var(--sh);transition:transform .4s cubic-bezier(.22,.8,.36,1),box-shadow .4s;position:relative;display:flex;flex-direction:column}
.card:hover{transform:translateY(-8px);box-shadow:var(--sh2)}
.card .thumb{aspect-ratio:16/10;background:linear-gradient(135deg,var(--tint),#d5e4f8);overflow:hidden;position:relative}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.22,.8,.36,1)}
.card:hover .thumb img{transform:scale(1.06)}
.card .thumb img[src=""],.card .thumb img:not([src]){visibility:hidden}
.card .cbody{padding:22px 24px 24px;flex:1;display:flex;flex-direction:column}
.card .cbody h3{font-size:17.5px;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-weight:600}
.card .cbody h3::after{content:"";position:absolute;inset:0}
.card .cbody p{font-size:14px;color:var(--mut);margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7}
.card .cbody .meta{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:16px;font-size:12.5px;color:#93a1b8}
.card .cbody .meta b{color:var(--orange);font-weight:600}
/* 面包屑 */
.crumb{font-size:13.5px;color:var(--mut)}
.crumb a{color:var(--mut)}
.crumb a:hover{color:var(--navy)}
.crumb b{color:var(--ink);font-weight:600}
/* 浮动咨询 */
.fconsult{position:fixed;right:20px;bottom:22vh;z-index:50;display:flex;flex-direction:column;gap:12px}
.fconsult a{width:60px;height:60px;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;font-size:11px;line-height:1.2;box-shadow:0 12px 28px rgba(0,0,0,.2);transition:transform .3s}
.fconsult a:hover{transform:scale(1.08)}
.fconsult .zx{background:var(--ograd)}
.fconsult .top_{background:var(--grad)}
.fconsult svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:2;margin-bottom:3px}
/* 页脚 */
footer.site{background:var(--deep);color:#b9cbe8;padding:70px 0 0;position:relative;margin-top:90px}
footer.site::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--navy),#3a7bd5 40%,var(--orange))}
footer.site .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:44px;padding-bottom:46px}
footer.site h4{font-size:16.5px;color:#fff;margin-bottom:18px;position:relative;padding-left:13px;font-weight:600}
footer.site h4::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--ograd)}
footer.site .about p{font-size:14px;color:#9db6dd;margin-top:16px;line-height:1.95}
footer.site .fquals{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
footer.site .fquals img{height:28px}footer.site .fquals img[alt*="CNAS"]{filter:brightness(2.6) saturate(1.1)}footer.site .fquals img[alt*="ISO"]{filter:brightness(2)}
footer.site li a{display:block;font-size:14.5px;color:#b9cbe8;padding:5.5px 0;transition:all .25s}
footer.site li a:hover{color:#fff;padding-left:6px}
footer.site .contact p{font-size:14.5px;color:#b9cbe8;padding:5.5px 0}
footer.site .contact .cc{display:inline-block;margin-top:14px;background:var(--ograd);color:#fff;padding:13px 30px;border-radius:8px;font-weight:600;font-size:15px;box-shadow:0 8px 20px rgba(254,106,0,.3)}
footer.site .flink{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:13px;color:#8ba6d0;line-height:2}
footer.site .flink a{color:#8ba6d0;margin-right:10px}
footer.site .flink a:hover{color:#fff}
footer.site .base{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;text-align:center;font-size:13px;color:#8ba6d0}
footer.site .base a{color:#8ba6d0}
footer.site .about .logo img{height:46px;filter:brightness(0) invert(1)}
/* 证书灯箱（全站） */
#wslb{position:fixed;inset:0;background:rgba(6,14,32,.93);z-index:220;display:none;align-items:center;justify-content:center;cursor:zoom-out}
#wslb.on{display:flex}
#wslb img{max-width:92vw;max-height:92vh;border-radius:10px;box-shadow:0 40px 100px rgba(0,0,0,.55)}
#wslb .wslb-x{position:absolute;top:16px;right:28px;font-size:36px;color:#fff;line-height:1}
#wslb .wslb-tip{position:absolute;bottom:22px;left:0;right:0;text-align:center;color:#9db6dd;font-size:13px;letter-spacing:2px}
/* 证书通用 */
.cert-zoom{cursor:zoom-in;display:block}
.cert-zoom img{background:#fff}
/* Chatwoot自动展开时隐藏左侧大气泡（避免遮挡内容），聊天窗保留 */
body.woot-widget-expanded #cw-side-bubble{display:none!important}
/* ===== 响应式 ===== */
@media (max-width:1600px){.nav-quals{display:none}}
@media (max-width:1440px){.menu>li>a{padding:14px 13px;font-size:15.5px}.nav-right{gap:12px}}
@media (max-width:1299px){.dropdown.mega{min-width:min(720px,92vw)}.dd-main{grid-template-columns:1fr}.dd-item span{display:none}}
@media (max-width:1299px){.nav-tel{display:none}.menu>li>a{padding:14px 10px;font-size:14.5px}.g4{grid-template-columns:repeat(3,1fr)}.nav-cta{padding:12px 20px;font-size:15px}}
@media (max-width:1023px){body{padding-top:96px}.topbar{display:none}.navbar{top:0;height:74px}.navbar .wrap{height:74px;gap:12px}.menu{display:none}.logo img{height:44px}.burger{display:flex;width:44px;height:44px;border-radius:10px;background:var(--tint);align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer}.burger i{display:block;width:20px;height:2.4px;border-radius:2px;background:var(--navy)}.g4,.g3{grid-template-columns:repeat(2,1fr)}.sec{padding:78px 0}.sechead{margin-bottom:48px}footer.site .cols{grid-template-columns:1fr 1fr}}
@media (max-width:767px){body{padding-top:70px}.navbar{height:70px}.navbar .wrap{height:70px;gap:8px}.logo img{height:40px}.nav-cta{display:none}.g4,.g3,.g2{grid-template-columns:1fr}.fconsult{bottom:96px}.fconsult .top_{display:none}.mquick{display:flex!important}.sec{padding:60px 0}.st-panel{top:12vh;padding:24px 18px 18px}.wrap{padding:0 20px}}
@media (min-width:2560px){body{font-size:18px}.wrap{max-width:1800px}.sec{padding:130px 0}}
@media (min-width:3840px){body{font-size:22px}.wrap{max-width:2560px}}
/* 移动底部快捷栏 */
.mquick{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.95);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-top:1px solid var(--line);padding:9px 6px calc(9px + env(safe-area-inset-bottom))}
.mquick a{flex:1;text-align:center;font-size:11.5px;color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:3px}
.mquick a b{width:26px;height:26px;border-radius:9px;background:var(--tint);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--navy)}
.mquick a.zx b{background:var(--ograd);color:#fff}
.mquick label{flex:1;text-align:center;font-size:11.5px;color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer}
.mquick b svg,.mquick label b svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}