:root{--color-ink:#202124;--color-muted:#5f6368;--color-soft:#f6f6f4;--color-line:#dedede;--color-red:#cf2b4d;--color-red-dark:#a91f3b;--color-white:#fff;--shadow-subtle:0 16px 34px #11182714;color:var(--color-ink);background:var(--color-white);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px}*{box-sizing:border-box}body{min-width:320px;color:var(--color-ink);background:var(--color-white);margin:0;font-size:14px;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.app-main{min-height:calc(100vh - 145px)}.site-shell{width:min(1120px,100% - 40px);margin:0 auto}.site-header{z-index:20;border-bottom:1px solid var(--color-line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff5;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:24px;height:64px;display:flex}.brand,.footer-brand{letter-spacing:0;align-items:center;gap:10px;font-weight:800;display:inline-flex}.brand:focus{outline:none}.brand:focus-visible .brand-mark{box-shadow:0 0 0 2px var(--color-white), 0 0 0 4px var(--color-ink)}.brand-mark{background:var(--color-ink);width:34px;height:34px;color:var(--color-white);border-radius:8px;justify-content:center;align-items:center;font-weight:900;display:inline-flex}.brand-mark.small{border-radius:6px;width:26px;height:26px;font-size:13px}.brand-text{font-size:18px}.desktop-nav,.header-actions{align-items:center;gap:6px;display:flex}.desktop-nav{margin-left:auto}.nav-link{color:var(--color-muted);border-radius:6px;padding:9px 12px;font-size:15px;position:relative}.nav-link:hover,.nav-link.active{color:var(--color-ink);background:var(--color-soft)}.nav-link.active:after{background:var(--color-ink);content:"";height:2px;position:absolute;bottom:4px;left:12px;right:12px}.login-button,.primary-button,.secondary-button,.text-button,.avatar-button,.menu-button{border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;min-height:40px;transition:background-color .16s,border-color .16s,color .16s,transform .16s;display:inline-flex}.login-button,.primary-button{background:var(--color-ink);color:var(--color-white);padding:0 18px;font-weight:700}.login-button{min-height:36px;padding:0 14px;font-size:15px}.login-button:hover,.primary-button:hover{background:var(--color-red)}.secondary-button,.text-button{border-color:var(--color-line);background:var(--color-white);color:var(--color-ink);padding:0 18px;font-weight:700}.secondary-button:hover,.text-button:hover{border-color:var(--color-ink)}.avatar-button{border-color:var(--color-line);width:34px;min-height:34px;color:var(--color-ink);background:#f4f4f2;border-radius:50%;padding:0;font-size:14px;font-weight:800}.avatar-button:hover,.user-menu.open .avatar-button{background:#fff;border-color:#c8c8c3}.user-menu{display:inline-flex;position:relative}.user-menu:after{content:"";width:100%;height:10px;position:absolute;top:100%;right:0}.user-menu-popover{z-index:30;border:1px solid var(--color-line);background:var(--color-white);opacity:0;pointer-events:none;border-radius:8px;min-width:128px;transition:opacity .14s,transform .14s;display:grid;position:absolute;top:calc(100% + 10px);right:0;overflow:hidden;transform:translateY(-4px);box-shadow:0 16px 34px #1118271f}.user-menu.open .user-menu-popover{opacity:1;pointer-events:auto;transform:translateY(0)}.user-menu-popover button{border:0;border-bottom:1px solid var(--color-line);background:var(--color-white);min-height:40px;color:var(--color-ink);text-align:left;padding:0 14px;font-size:14px;font-weight:700}.user-menu-popover button:last-child{border-bottom:0}.user-menu-popover button:hover,.user-menu-popover button:focus-visible{background:var(--color-soft)}.menu-button{border-color:var(--color-line);background:var(--color-white);flex-direction:column;gap:5px;width:40px;display:none}.menu-button span{background:var(--color-ink);width:17px;height:2px}.mobile-nav{display:none}.hero-section{border-bottom:1px solid var(--color-line);background:#f9f9f7;min-height:590px;position:relative;overflow:hidden}.hero-layout{grid-template-columns:minmax(0,1fr) minmax(430px,.82fr);align-items:center;gap:58px;padding:104px 0 78px;display:grid}.hero-content{z-index:2;min-width:0;position:relative}.eyebrow{color:var(--color-red);letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px;font-size:13px;font-weight:800;display:inline-flex}.hero-content h1,.page-hero h1{letter-spacing:0;max-width:700px;margin:0;font-size:64px;line-height:1.08}.hero-copy,.page-hero p{max-width:560px;color:var(--color-muted);margin:24px 0 0;font-size:20px;line-height:1.8}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:34px;display:flex}.hero-visual{z-index:1;min-height:520px;position:relative}.solo-company-map{isolation:isolate;width:min(100%,560px);height:520px;margin-left:auto;position:absolute;inset:0}.business-loop-svg{width:100%;height:100%;display:block}.business-loop-svg text{cursor:default;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}.business-loop-svg .title-main{fill:#111;letter-spacing:4px;font-size:24px;font-weight:700}.business-loop-svg .title-sub{fill:#666;letter-spacing:2px;font-size:12px;font-weight:400}.business-loop-svg .node-title{fill:#111;letter-spacing:2px;font-size:14px;font-weight:600}.business-loop-svg .node-title-inverse{fill:#fff;letter-spacing:0;font-weight:700}.business-loop-svg .node-func{fill:#999;letter-spacing:1px;font-size:10px;font-weight:400}.business-loop-svg .node-group:hover .node-circle{stroke:#000;stroke-width:3px}.site-section{padding:84px 0}.site-section.muted{border-top:1px solid var(--color-line);background:var(--color-soft)}.section-head{flex-direction:column;margin-bottom:30px;display:flex}.section-head h2,.feature-panel h2,.track-row h2,.profile-panel h2{letter-spacing:0;margin:0;font-size:32px;line-height:1.2}.three-grid,.two-column{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.two-column{grid-template-columns:repeat(2,1fr)}.plain-card,.feature-panel{border:1px solid var(--color-line);background:var(--color-white);border-radius:8px;min-height:184px;padding:28px}.plain-card h3,.feature-panel h2{margin:0}.plain-card p,.feature-panel p{color:var(--color-muted);margin:18px 0 0;line-height:1.8}.capability-list,.course-track-list,.source-list,.source-step-list{gap:14px;display:grid}.capability-row,.track-row,.source-card,.device-row{border:1px solid var(--color-line);background:var(--color-white);border-radius:8px;grid-template-columns:160px 1fr 24px;align-items:center;gap:18px;padding:22px 24px;display:grid}.capability-row span,.track-row h2{font-weight:800}.capability-row p{color:var(--color-muted);margin:0;line-height:1.7}.capability-row b{color:var(--color-red);font-size:20px}.page-hero{border-bottom:1px solid var(--color-line);background:#f9f9f7}.compact-hero .site-shell{padding:84px 0 74px}.source-hero-inner,.profile-hero-inner{justify-content:space-between;align-items:end;gap:24px;display:flex}.feature-panel{min-height:220px}.panel-index{color:var(--color-red);margin-bottom:34px;font-weight:900;display:block}.track-row{grid-template-columns:1fr auto}.track-row span{color:var(--color-muted)}.filter-bar{grid-template-columns:minmax(220px,1fr) 180px;gap:12px;margin-bottom:24px;display:grid}.filter-bar input,.filter-bar select,.login-form input,.info-grid input{border:1px solid var(--color-line);background:var(--color-white);width:100%;min-height:44px;color:var(--color-ink);border-radius:8px}.filter-bar input,.login-form input,.info-grid input{padding:0 14px}.filter-bar select{padding:0 12px}.source-card{grid-template-columns:1fr 310px;align-items:stretch}.source-card-main h2{margin:14px 0 0;font-size:26px}.source-card-main p,.source-card-side p{color:var(--color-muted);line-height:1.8}.source-card-side{border-left:1px solid var(--color-line);padding-left:22px}.source-card-side span,.info-grid span,.login-form span{color:var(--color-muted);font-size:13px;font-weight:700}.source-meta{flex-wrap:wrap;gap:8px;margin-top:20px;display:flex}.source-meta span,.status-chip{border:1px solid var(--color-line);min-height:28px;color:var(--color-muted);border-radius:6px;align-items:center;padding:0 10px;font-size:13px;display:inline-flex}.status-chip{color:var(--color-red);background:#cf2b4d14;border-color:#cf2b4d38}.source-profile-link{margin-top:26px;font-weight:800}.source-profile-link a{color:var(--color-red)}.empty-state{text-align:center;border:1px dashed #c9c9c6;border-radius:8px;padding:46px}.empty-state.compact{padding:34px}.empty-state h2,.empty-state h3{margin:0}.empty-state p{color:var(--color-muted);margin:10px 0 0}.profile-layout{grid-template-columns:230px 1fr;align-items:start;gap:24px;display:grid}.profile-tabs,.profile-panel{border:1px solid var(--color-line);background:var(--color-white);border-radius:8px}.profile-tabs{align-content:start;align-self:start;display:grid;overflow:hidden}.profile-tabs button{border:0;border-bottom:1px solid var(--color-line);background:var(--color-white);min-height:54px;color:var(--color-muted);text-align:left;padding:0 18px}.profile-tabs button.active{color:var(--color-red);background:#cf2b4d14;font-weight:800}.profile-panel{min-height:420px;padding:30px}.panel-head{justify-content:space-between;align-items:center;gap:16px;margin-bottom:26px;display:flex}.panel-head span{color:var(--color-muted)}.info-grid{grid-template-columns:repeat(2,1fr);gap:18px;display:grid}.info-grid label,.login-form label{gap:8px;display:grid}.device-row{grid-template-columns:1fr auto}.source-step{border:1px solid var(--color-line);border-radius:8px;align-items:center;gap:14px;padding:18px;display:flex}.source-step span{background:var(--color-ink);width:30px;height:30px;color:var(--color-white);border-radius:6px;justify-content:center;align-items:center;font-weight:800;display:inline-flex}.site-footer{border-top:1px solid var(--color-line);background:var(--color-white)}.footer-inner{justify-content:space-between;align-items:center;gap:24px;min-height:80px;display:flex}.footer-links{color:var(--color-muted);flex-wrap:wrap;justify-content:flex-end;gap:10px 18px;font-size:14px;display:flex}.footer-links a:hover{color:var(--color-red)}.modal-backdrop{z-index:50;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#2021248f;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.login-modal{background:var(--color-white);border-radius:8px;width:min(520px,100%);max-height:calc(100dvh - 48px);padding:0;position:relative;overflow:auto;box-shadow:0 26px 70px #00000042}.login-modal--wechat{width:min(930px,100%)}.modal-close{z-index:2;border:1px solid var(--color-line);background:var(--color-white);width:38px;height:38px;color:var(--color-muted);border-radius:6px;font-size:20px;line-height:1;position:absolute;top:18px;right:18px}.modal-close:hover{border-color:var(--color-red);color:var(--color-red)}.login-head{align-items:center;min-height:74px;padding:0 66px 0 34px;display:flex}.login-head h2{margin:0;font-size:26px;line-height:1.2}.login-tabs{grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:26px;display:grid}.login-tabs button{border:1px solid var(--color-line);background:var(--color-white);min-height:42px;color:var(--color-muted);border-radius:6px;font-size:14px}.login-tabs button.active{border-color:var(--color-red);color:var(--color-red);background:#cf2b4d14;font-weight:800}.login-form-panel,.login-form{gap:18px;display:grid}.login-form-panel{padding:34px 44px 42px}.wechat-login{grid-template-columns:.92fr 1.08fr;min-height:492px;display:grid}.wechat-brand-panel{background:var(--color-white);color:var(--color-ink);border-right:1px solid #eeeeec;align-items:center;display:flex;position:relative;overflow:hidden}.wechat-brand-panel:after{content:none}.wechat-brand-content{z-index:1;padding:58px 48px;position:relative}.wechat-brand-logo{justify-content:center;align-items:center;display:inline-flex}.nodeing-login-logo{color:var(--color-ink);gap:12px}.nodeing-login-mark{background:var(--color-ink);width:58px;height:58px;color:var(--color-white);border-radius:14px;justify-content:center;align-items:center;font-size:28px;font-weight:900;display:inline-flex}.nodeing-login-word{color:var(--color-ink);letter-spacing:0;font-size:28px;font-weight:900}.wechat-brand-content h3{margin:28px 0 0;font-size:32px;line-height:1.2}.wechat-brand-content p{color:var(--color-muted);margin:14px 0 0;line-height:1.8}.wechat-feature-list{gap:14px;margin-top:36px;display:grid}.wechat-feature-list span{color:var(--color-ink);align-items:center;gap:10px;font-weight:700;display:inline-flex;position:relative}.wechat-feature-list span:before{background:var(--color-red);width:18px;height:18px;color:var(--color-white);content:"✓";border-radius:50%;justify-content:center;align-items:center;font-size:12px;font-weight:900;display:inline-flex}.wechat-main-panel{align-content:center;justify-items:center;padding:56px 52px;display:grid}.wechat-main-panel p{color:var(--color-muted);margin:0}.qr-frame{background:var(--color-white);border:1px solid #d7d7d4;border-radius:8px;place-items:center;width:286px;height:286px;padding:18px;display:grid;box-shadow:0 18px 42px #2021241f}.wechat-qr-image{object-fit:contain;width:100%;height:100%}.wechat-qr-state{background:#f7f7f5;border-radius:6px;place-items:center;width:100%;height:100%;display:grid}.qr-spinner{border:3px solid #d9d9d6;border-top-color:var(--color-red);border-radius:50%;width:42px;height:42px;animation:.8s linear infinite qr-spin}.qr-state-mark{background:var(--color-red);width:58px;height:58px;color:var(--color-white);border-radius:14px;justify-content:center;align-items:center;font-size:28px;font-weight:900;display:inline-flex}@keyframes qr-spin{to{transform:rotate(360deg)}}.wechat-main-panel .qr-frame+p{text-align:center;margin-top:24px;font-weight:700}.login-switch-button{min-height:38px;color:var(--color-red);border-color:#0000;margin-top:18px}.login-switch-button:hover{background:#cf2b4d14;border-color:#cf2b4d3d}.login-refresh-button{min-width:154px;margin-top:18px}.full{width:100%}@media (width<=860px){.desktop-nav,.desktop-only{display:none}.menu-button{display:inline-flex}.mobile-nav{border-top:1px solid var(--color-line);background:var(--color-white);padding:8px 20px 14px;display:grid}.mobile-nav-link{border:0;border-bottom:1px solid var(--color-line);background:var(--color-white);color:var(--color-muted);text-align:left;padding:16px 0}.mobile-nav-link.active{color:var(--color-red);font-weight:800}.hero-content h1,.page-hero h1{font-size:44px}.hero-copy,.page-hero p{font-size:18px}.hero-layout{grid-template-columns:1fr;gap:36px;padding:82px 0 64px}.hero-visual{min-height:520px}.solo-company-map{width:min(100%,520px);height:520px;margin:0 auto;position:relative}.three-grid,.two-column,.profile-layout,.info-grid,.source-card{grid-template-columns:1fr}.source-card-side{border-left:0;border-top:1px solid var(--color-line);padding:18px 0 0}.login-modal--wechat{width:min(620px,100%)}.wechat-login{grid-template-columns:1fr}.wechat-brand-panel{border-right:0;border-bottom:1px solid var(--color-line);min-height:260px}.wechat-brand-content{padding:36px}.wechat-main-panel{padding:38px 34px 42px}.source-hero-inner,.profile-hero-inner,.footer-inner,.panel-head{flex-direction:column;align-items:flex-start}.footer-links{justify-content:flex-start}}@media (width<=560px){.site-shell{width:min(100% - 28px,1120px)}.brand-text{font-size:16px}.hero-layout{padding:64px 0 52px}.hero-content{padding:0}.hero-content h1,.page-hero h1{font-size:36px}.hero-visual{min-height:360px}.solo-company-map{width:min(100%,360px);height:360px}.compact-hero .site-shell,.site-section{padding:58px 0}.filter-bar,.capability-row,.track-row{grid-template-columns:1fr}.profile-panel,.plain-card,.feature-panel,.source-card{padding:22px}.login-tabs{grid-template-columns:1fr}.modal-backdrop{padding:14px}.login-head{min-height:66px;padding:0 58px 0 22px}.login-head h2{font-size:23px}.login-form-panel{padding:26px 22px 30px}.wechat-brand-content h3{font-size:28px}.qr-frame{aspect-ratio:1;width:min(276px,100%);height:auto}}