:root{--navy:#071f39;--deep:#04162b;--blue:#0763e8;--cyan:#46d7da;--ink:#102c46;--muted:#62748a;--line:#dce4ed;--pale:#f2f6fa;--white:#fff;--orange:#ff943c}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:#fff;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #ff943c;outline-offset:5px}button{border:0}.wrap{max-width:1240px;margin:auto;padding:0 40px}.eyebrow{font-size:13px;letter-spacing:.15em;text-transform:uppercase;font-weight:700;color:var(--blue);margin:0 0 20px}.section{padding:100px 0}.section-title{font-size:clamp(28px,3vw,42px);line-height:1.4;letter-spacing:-.03em;margin:0 0 20px}.intro{color:var(--muted);max-width:640px;margin:0}.section-head{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:46px}.text-link{display:inline-flex;gap:20px;align-items:center;font-size:15px;font-weight:700;color:var(--blue)}.text-link span{transition:transform .2s}.text-link:hover span{transform:translateX(4px)}
.header{height:90px;background:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid #edf1f5}.header-row{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.brand-symbol{width:43px;height:43px;background:var(--navy);color:white;display:grid;place-items:center;font-weight:900;font-size:23px;border-radius:9px}.brand-name{font-size:23px;font-weight:900;letter-spacing:.09em;line-height:1.3}.brand-en{font-size:10px;letter-spacing:.22em;color:#697e91;line-height:1.8}.nav{display:flex;gap:28px;align-items:center;font-size:14px;font-weight:600}.nav a:hover{color:var(--blue)}.nav .nav-cta{padding:10px 19px;background:var(--blue);color:#fff;border-radius:4px}.menu-button{display:none;background:none;color:var(--ink);padding:8px;font-size:24px}.skip{position:fixed;top:-90px;left:15px;z-index:99;background:white;padding:10px}.skip:focus{top:10px}
.hero{background:var(--deep);color:white;position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr 1fr;gap:48px;align-items:center;min-height:635px;padding-top:70px;padding-bottom:68px}.hero .eyebrow{color:var(--cyan);display:flex;align-items:center;gap:12px}.hero .eyebrow:before{content:"";width:28px;height:2px;background:var(--cyan)}h1{font-size:clamp(38px,4.25vw,59px);letter-spacing:-.035em;line-height:1.35;margin:0 0 24px;font-weight:800}.accent{color:var(--cyan)}.hero-desc{color:#b6c8dc;max-width:500px;line-height:1.95;font-size:17px}.hero-actions{display:flex;gap:20px;align-items:center;margin:32px 0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:28px;min-height:52px;padding:12px 24px;border-radius:4px;background:var(--blue);color:#fff;font-weight:700;font-size:15px;border:1px solid transparent}.btn:hover{background:#0757ca}.btn-light{background:var(--cyan);color:var(--deep)}.btn-light:hover{background:#8beded}.btn-outline{background:transparent;border-color:#39536f;color:white}.btn-outline:hover{background:#173451}.hero-note{display:flex;gap:24px;color:#a9bed2;font-size:13px}.hero-note span:before{content:"✓";color:var(--cyan);margin-right:7px}
.system-visual{position:relative;height:440px;isolation:isolate;background:radial-gradient(ellipse,#0b345e55,transparent 68%)}.orbit{position:absolute;border:1px solid #244c70;border-radius:50%;inset:25px 15px}.orbit:after{content:"";position:absolute;inset:42px;border-radius:50%;border:1px dashed #285779}.system-core{position:absolute;z-index:2;left:50%;top:50%;transform:translate(-50%,-50%);width:154px;height:154px;border:1px solid #258bba;border-radius:50%;background:#082c50;box-shadow:0 0 70px #0c8db229;display:flex;align-items:center;justify-content:center;flex-direction:column}.system-core strong{font-size:24px;letter-spacing:.05em}.system-core span{font-size:12px;color:#90b8d8;margin-top:6px}.system-node{position:absolute;z-index:3;border:1px solid #355573;border-radius:9px;background:#0b2743;padding:16px 20px;width:194px;box-shadow:0 15px 28px #0002}.node-top{display:flex;gap:10px;align-items:center}.node-icon{font-size:18px;color:var(--cyan);width:30px;height:30px;background:#133d5d;border-radius:5px;display:grid;place-items:center;font-weight:800}.system-node strong{font-size:17px}.system-node small{display:block;font-size:12px;color:#92acc5;margin-top:7px}.node1{top:14px;left:8px}.node2{top:71px;right:-5px}.node3{bottom:22px;left:15px}.node4{bottom:66px;right:-5px}.orbit-label{position:absolute;left:44%;top:12px;font-size:12px;letter-spacing:.16em;color:#5e84a4}.visual-caption{position:absolute;bottom:-16px;text-align:center;width:100%;font-size:12px;color:#6289ac;letter-spacing:.12em}
.trust-strip{background:#0a2b4c;border-top:1px solid #21415e;color:#c4d3e1}.trust-items{display:grid;grid-template-columns:repeat(4,1fr);padding-top:21px;padding-bottom:21px}.trust-items span{display:flex;align-items:center;justify-content:center;gap:12px;font-size:14px;border-right:1px solid #2c4965}.trust-items span:first-child{justify-content:start}.trust-items span:last-child{border:0}.trust-items b{font-weight:600;color:#fff}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:9px;overflow:hidden}.service-card{padding:32px 25px 28px;border-right:1px solid var(--line);transition:background .2s;display:flex;flex-direction:column;align-items:start}.service-card:last-child{border:0}.service-card:hover{background:#f5f9ff}.service-top{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:30px}.service-number{font-size:12px;color:#91a1b3;letter-spacing:.1em}.service-icon{width:48px;height:48px;display:grid;place-items:center;color:var(--blue);background:#edf4ff;border-radius:8px;font-size:22px;font-weight:800}.service-card h3{font-size:21px;line-height:1.55;margin:0 0 13px}.service-card p{font-size:14px;color:var(--muted);margin:0 0 17px}.service-card ul{padding:0;list-style:none;font-size:14px;line-height:2.1;margin:0 0 24px}.service-card li:before{content:"·";color:var(--blue);font-weight:bold;margin-right:9px}.service-card .text-link{margin-top:auto;font-size:14px}
.footer{background:#04162b;color:#8ea8c1;padding:38px 0;font-size:12px}.footer-row{display:flex;justify-content:space-between;gap:24px;align-items:center}.footer a{color:#b9cce0}.footer p{margin:0}.footer-links{display:flex;gap:20px}.pale{background:var(--pale)}.dark{background:var(--navy);color:white}.dark .eyebrow{color:var(--cyan)}.dark .intro{color:#a9bdd2}
@media(min-width:1440px){.wrap{max-width:1320px}.hero-grid{min-height:690px;gap:80px}}
@media(max-width:1050px){.nav{gap:17px}.wrap{padding:0 28px}.hero-grid{gap:25px}.system-node{width:166px;padding:14px}.system-node strong{font-size:15px}.system-core{width:132px;height:132px}.system-core strong{font-size:21px}.service-grid{grid-template-columns:repeat(2,1fr)}.service-card:nth-child(2){border-right:0}.service-card:nth-child(-n+2){border-bottom:1px solid var(--line)}.hero-note{gap:12px;font-size:12px}}
@media(max-width:760px){.wrap{padding-left:22px;padding-right:22px}.header{height:76px}.brand-name{font-size:21px}.brand-symbol{width:39px;height:39px}.brand-en{font-size:9px}.menu-button{display:block}.nav{display:none;position:absolute;top:76px;left:0;right:0;background:#fff;padding:18px 24px;box-shadow:0 14px 20px #102a4320;align-items:stretch}.nav.open{display:flex;flex-direction:column;gap:0}.nav a{padding:12px}.nav .nav-cta{text-align:center;margin:10px 0}.hero-grid{grid-template-columns:1fr;padding-top:50px;padding-bottom:50px;gap:28px}.hero-desc{font-size:16px}.hero-actions{gap:12px;flex-wrap:wrap}.btn{gap:18px;padding:11px 19px}.hero-note{flex-wrap:wrap;gap:18px}.system-visual{height:395px;max-width:480px;width:100%;margin:auto}.system-node{width:167px}.node1{left:0;top:8px}.node2{right:0;top:75px}.node3{left:0;bottom:22px}.node4{right:0;bottom:79px}.system-core{width:126px;height:126px}.system-core strong{font-size:20px}.orbit{inset:20px 8px}.orbit-label{display:none}.trust-items{grid-template-columns:repeat(2,1fr);gap:14px 0;padding-top:20px;padding-bottom:20px}.trust-items span{font-size:12px}.trust-items span:first-child{justify-content:center}.trust-items span:nth-child(2){border:0}.section{padding:65px 0}.section-head{display:block;margin-bottom:32px}.section-head>.text-link{margin-top:22px}.service-card{padding:25px 21px}.service-card h3{font-size:19px}.service-icon{width:42px;height:42px}.service-top{margin-bottom:24px}.footer-row{display:block}.footer-links{margin-top:16px;flex-wrap:wrap}.hero h1{font-size:40px}}
@media(max-width:390px){.hero h1{font-size:35px}.system-node{width:151px;padding:12px}.system-node strong{font-size:14px}.service-grid{grid-template-columns:1fr}.service-card{border-right:0;border-bottom:1px solid var(--line)}.service-card:nth-child(3){border-bottom:1px solid var(--line)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

.brand-symbol{background:#04162b url('/assets/yunhu-services.jpg') -10px -5px / 194px auto no-repeat;color:transparent;border-radius:5px}
.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:95px}.method-link{margin-top:28px}.method-quote{font-size:23px;line-height:1.6;margin-top:43px;border-left:3px solid var(--blue);padding-left:22px;font-weight:700}.method-quote small{font-size:12px;font-weight:400;color:var(--muted);display:block;margin-top:15px}.method-step{display:flex;gap:24px;border-bottom:1px solid #d7e1ec;padding:23px 0}.method-step:first-child{padding-top:0}.method-step:last-child{border:0;padding-bottom:0}.method-step>span{font-size:15px;color:var(--blue);font-weight:700;padding-top:4px}.method-step h3{font-size:20px;margin:0 0 8px}.method-step p{color:var(--muted);font-size:15px;margin:0}.video-stat strong{color:var(--cyan);font-size:32px;white-space:nowrap;font-weight:500}.video-stat strong span{font-size:15px;color:#fff}.video-stat p{color:#92b0ca;font-size:12px;margin:8px 0}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin:48px 0 30px}.day-label{font-size:14px;letter-spacing:.08em;color:var(--cyan)}.timeline h3{font-size:26px;margin:20px 0 8px}.buyer-question{color:#d5e3ef;font-size:17px;margin:0 0 7px}.video-topics{color:#95aec5;font-size:13px}.timeline-bar{height:3px;background:#214363;margin-top:30px}.timeline-bar i{display:block;height:3px;background:var(--cyan)}.light-link{color:var(--cyan);margin-top:18px}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.resource-card{border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:transform .2s,box-shadow .2s}.resource-card:hover{transform:translateY(-4px);box-shadow:0 15px 35px #102c4610}.resource-cover{padding:27px 28px 20px;background:#0a3d67;color:white;position:relative}.resource-cover>span{font-size:11px;letter-spacing:.14em;color:#91c6e6}.resource-cover h3{font-size:25px;line-height:1.55;margin:23px 0}.cover-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #ffffff30;padding-top:14px}.cover-bottom b{font-size:12px;font-weight:400;color:#d9e7f1}.cover-bottom em{font-style:normal;font-size:34px;font-weight:300;color:#ffffff50;line-height:1}.cover-video-system{background:#096a70}.cover-video-system>span{color:#9ce1df}.cover-growth-system{background:#0c2550}.resource-caption{padding:21px 26px 24px}.resource-caption p{font-size:14px;color:var(--muted);margin:0 0 16px}.resource-caption>span{font-size:14px;color:var(--blue);font-weight:700}
.about-grid{display:grid;grid-template-columns:.83fr 1.1fr;gap:100px;align-items:center}.poster-frame{max-width:345px;margin:auto}.poster-frame img{display:block;width:100%;height:auto;border-radius:8px;box-shadow:0 18px 45px #132f4720}.poster-frame a{display:block;text-align:center;font-size:12px;margin-top:15px;color:var(--muted)}.about-lead{font-size:18px;line-height:1.85;margin-bottom:22px}.about-lead strong{font-weight:500;color:var(--blue);font-size:15px}.about-values{margin:30px 0}.about-values>div{border-bottom:1px solid var(--line);padding:12px 0;display:flex;align-items:baseline;gap:25px}.about-values>div:last-child{border:0}.about-values b{font-size:15px;min-width:90px}.about-values p{margin:0;color:var(--muted);font-size:14px}
.contact{background:#fff}.contact-grid{display:grid;grid-template-columns:1.5fr .7fr;gap:90px;align-items:center}.contact-person{font-size:20px;font-weight:700;margin-top:36px}.contact-person span{font-size:16px;font-weight:400}.contact-phone{font-size:clamp(29px,3.1vw,43px);font-weight:700;line-height:1.5;white-space:nowrap;letter-spacing:-.02em}.contact-phone span{color:var(--blue);font-size:27px}.contact-buttons{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap}.contact-email{background:#edf3fa;color:var(--ink)}.contact-email:hover{background:#e1ebf6}.copy-status{font-size:13px;color:var(--blue);min-height:22px;margin:6px 0}.contact-details{font-size:14px;color:var(--muted)}.contact-details p{margin:5px 0;display:flex;gap:14px}.contact-details p>span{min-width:30px;color:#405974}.contact-details .icp{font-size:12px;margin-top:13px}.wechat-card{background:#f5f8fc;border:1px solid var(--line);padding:25px;border-radius:10px;max-width:310px;text-align:center}.wechat-card img{display:block;width:100%;height:auto}.wechat-card p{font-size:14px;font-weight:600;margin:17px 0 4px}.wechat-card a{font-size:12px;color:var(--muted)}
.breadcrumb{font-size:13px;color:#819bb4;display:flex;gap:12px;flex-wrap:wrap;margin-bottom:37px}.detail-hero{background:var(--navy);color:#fff;padding:46px 0 72px}.detail-hero .eyebrow{color:var(--cyan)}.detail-hero h1{font-size:clamp(32px,4vw,52px);max-width:850px}.detail-hero .lead{color:#b7cbdc;max-width:800px;font-size:17px}.detail-layout{display:grid;grid-template-columns:1fr 320px;gap:80px;align-items:start}.article h2{font-size:28px;margin:0 0 19px;line-height:1.5}.article h3{font-size:20px;margin:28px 0 14px}.article p,.article li{color:#52697e}.article p{margin:0 0 20px}.article ul,.article ol{padding-left:24px}.article li{margin:8px 0}.article-section{margin-bottom:45px}.article-section:last-child{margin-bottom:0}.side-panel{background:var(--pale);border:1px solid var(--line);padding:28px;border-radius:7px;position:sticky;top:122px}.side-panel h2{font-size:19px;margin:0 0 18px}.side-panel ul{list-style:none;padding:0;color:var(--muted);font-size:14px}.side-panel li{padding:9px 0;border-bottom:1px solid var(--line)}.side-panel li:before{content:"✓";color:var(--blue);margin-right:10px}.side-panel .btn{width:100%;margin-top:20px;gap:15px}.side-panel p{font-size:14px;color:var(--muted)}.article-callout{background:#edf4ff;border-left:3px solid var(--blue);padding:24px;margin:30px 0}.article-callout p:last-child{margin:0}.article .source-note{font-size:13px;color:#7a8e9f;border-top:1px solid var(--line);padding-top:22px;margin-top:42px}.article table{border-collapse:collapse;width:100%;font-size:14px;margin:25px 0}.article th{background:#edf3fa;text-align:left;white-space:nowrap}.article th,.article td{border:1px solid var(--line);padding:13px 16px}.table-scroll{overflow:auto}.article .related{margin-top:40px}.return-link{display:inline-flex;color:var(--blue);font-size:14px;gap:16px;margin-bottom:20px}.detail-bottom{padding:55px 0;background:#edf4fb}.detail-bottom .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px}.detail-bottom h2{font-size:26px;margin:0}.detail-bottom p{color:var(--muted);margin:8px 0 0}
@media(max-width:1050px){.method-grid{gap:50px}.about-grid{gap:55px}.resource-cover{padding:24px 20px 20px}.resource-cover h3{font-size:22px}.resource-caption{padding:20px}.contact-grid{gap:45px}.detail-layout{gap:45px;grid-template-columns:1fr 285px}}
@media(max-width:760px){.method-grid,.about-grid,.contact-grid,.detail-layout{grid-template-columns:1fr;gap:38px}.method-quote{margin-top:25px;font-size:21px}.method-step{padding:20px 0}.timeline{grid-template-columns:1fr;gap:27px;margin:32px 0 20px}.timeline h3{margin:10px 0 3px;font-size:24px}.timeline-bar{margin-top:20px}.video-stat{margin-top:25px}.resource-grid{grid-template-columns:1fr;gap:24px}.resource-cover{padding:24px 28px 20px}.resource-cover h3{font-size:26px}.resource-caption{padding:20px 27px}.about-grid>div:last-child{order:-1}.poster-frame{max-width:300px}.about-values>div{gap:15px;display:block}.about-values p{margin-top:3px}.contact-grid{gap:30px}.wechat-card{max-width:270px;margin:auto}.contact-details p{font-size:13px}.contact-phone{font-size:32px}.side-panel{position:static}.detail-hero{padding:30px 0 50px}.detail-hero .lead{font-size:16px}.breadcrumb{margin-bottom:28px;font-size:12px}.detail-bottom .wrap{display:block}.detail-bottom .btn{margin-top:25px}.article h2{font-size:25px}.article th,.article td{padding:11px}.section-title br{display:initial}}

.system-node strong{white-space:nowrap;font-size:14px;letter-spacing:-.02em}.node-icon{flex:0 0 28px}.btn{white-space:nowrap}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;padding-top:55px;gap:32px}.system-visual{height:410px;max-width:480px;width:100%;margin:auto}.hero-desc{max-width:600px}.hero-actions{flex-wrap:wrap}.hero h1{font-size:clamp(35px,6vw,48px)}.system-node{width:194px}.system-node strong{font-size:16px}.orbit-label{left:42%}}
@media(max-width:760px){.system-node{width:167px}.system-node strong{font-size:14px}.system-visual{height:395px}.orbit-label{display:none}}
@media(max-width:390px){.system-node{width:154px}.system-node strong{font-size:13px}}