*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F6F4FC;color:#3A3E58;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-60px;z-index:200;background:#2A2D4A;color:#fff;padding:8px 14px;border-radius:8px}.skip-link:focus{top:12px}.site-header{position:fixed;left:0;right:0;top:0;z-index:100;box-shadow:0 5px 20px rgba(42,45,74,.05)}.nation-line{height:7px;background:linear-gradient(90deg,#7B6BB5,#6BA3D6);color:#fff;overflow:visible}.top-inner{max-width:1140px;height:100%;margin:auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;font-size:0}.top-inner>span{position:absolute;top:9px;left:max(16px,calc((100vw - 1140px)/2 + 16px));z-index:2;color:#6A6E88;font-size:11px;letter-spacing:.04em;pointer-events:none}.plain-action{position:absolute;top:11px;right:max(16px,calc((100vw - 1140px)/2 + 16px));z-index:4;border:0;background:transparent;color:#2A2D4A;height:36px;padding:0 8px;cursor:pointer}.nation-stage{height:48px;background:#fff;border-bottom:1px solid rgba(201,184,232,.6)}.stage-inner{max-width:1140px;height:100%;margin:auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between}.brand-link{height:44px;display:flex;align-items:center;min-width:120px;color:#2A2D4A}.brand-link img{height:24px;width:auto;max-width:180px;object-fit:contain}.brand-link strong{font-size:19px;letter-spacing:.04em}.stage-actions{display:flex;gap:8px;align-items:center;padding-right:54px}.menu-button,.app-link,.close-button{min-height:44px;border-radius:10px;padding:0 15px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.menu-button{border:1px solid #B8D4F0;background:#fff;color:#2A2D4A}.app-link{background:#7B6BB5;color:#fff;border:1px solid #7B6BB5}.close-button{border:1px solid rgba(42,45,74,.12);background:#fff;color:#2A2D4A}.nation-nav{height:44px;background:#fff;border-bottom:1px solid rgba(42,45,74,.08);display:flex;align-items:center;justify-content:center}.nav-cluster{display:flex;align-items:center;gap:16px}.nav-cluster a{height:44px;display:flex;align-items:center;padding:0 6px;color:#3A3E58;position:relative}.nav-cluster i{width:1px;height:16px;background:#B8D4F0}.nav-cluster a.is-active{color:#7B6BB5}.nav-cluster a.is-active:after{content:"";position:absolute;height:2px;background:#6BA3D6;left:5px;right:5px;bottom:4px}.site-main{max-width:1140px;margin:0 auto;padding:132px 16px 70px}.overlay{position:fixed;inset:0;background:rgba(42,45,74,.38);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.layer-open{overflow:hidden}.nation-box,.search-panel{position:fixed;left:50%;transform:translateX(-50%) translateY(-10px);top:55px;z-index:120;background:#fff;border-radius:0 0 16px 16px;box-shadow:0 20px 50px rgba(42,45,74,.18);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;border-top:3px solid transparent;background-image:linear-gradient(#fff,#fff),linear-gradient(90deg,#7B6BB5,#6BA3D6);background-origin:border-box;background-clip:padding-box,border-box}.nation-box{width:min(640px,calc(100vw - 32px));height:360px;overflow:auto}.search-panel{width:min(420px,calc(100vw - 32px));padding:18px}.nation-box.is-open,.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}.box-head,.search-head{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;border-bottom:1px solid rgba(42,45,74,.08)}.box-brand{display:flex;align-items:center;gap:10px}.box-brand img{height:23px;width:auto;object-fit:contain}.box-brand span{display:flex;flex-direction:column;line-height:1.2}.box-brand small{font-size:10px;color:#8A8EAA}.menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 20px;padding:10px 18px 18px}.menu-grid h2{font-size:14px;color:#7B6BB5;margin:8px 0}.menu-grid a{display:block;padding:7px 8px;border-radius:8px}.menu-grid a:hover,.menu-grid a:focus-visible{background:#E8F2FA;outline:none}.menu-grid b{display:block;color:#2A2D4A;font-size:14px}.menu-grid span{display:block;color:#6A6E88;font-size:12px;line-height:1.45}.search-head{padding:0 0 14px}.search-head div{display:flex;flex-direction:column}.search-head span{font-size:13px;color:#6A6E88}.search-look{height:48px;border:1px solid #B8D4F0;border-radius:10px;margin:14px 0;display:flex;align-items:center;justify-content:space-between;padding:0 13px;color:#8A8EAA}.search-look kbd{font:inherit;font-size:12px;background:#E8F2FA;color:#2A2D4A;padding:3px 7px;border-radius:6px}.search-presets{display:grid;grid-template-columns:1fr 1fr;gap:8px}.search-presets a{min-height:44px;border:1px solid rgba(42,45,74,.1);border-radius:10px;display:flex;align-items:center;justify-content:center}.search-presets a:hover,.search-presets a:focus-visible{border-color:#6BA3D6;background:#F6F4FC;outline:none}.hero,.section-card,.content-card,.notice-card,.split-card{background:#fff;border:1px solid rgba(42,45,74,.12);box-shadow:0 14px 34px rgba(42,45,74,.09);border-radius:16px}.hero{padding:24px;text-align:center;margin-bottom:28px}.eyebrow{display:inline-block;color:#7B6BB5;font-weight:700;font-size:13px;letter-spacing:.08em}.hero h1,.page-head h1{color:#2A2D4A;font-size:clamp(28px,4vw,32px);line-height:1.28;margin:8px 0 12px}.hero p{max-width:780px;margin:0 auto 16px}.hero-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.btn{min-height:44px;padding:0 18px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center}.btn-primary{background:#7B6BB5;color:#fff}.btn-secondary{background:#fff;border:1px solid #6BA3D6;color:#2A2D4A}.media-box{background:#E8F2FA;border-radius:14px;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:8px}.media-box img{width:100%;height:100%;object-fit:contain;object-position:center}.media-placeholder{width:100%;min-height:160px;display:flex;align-items:center;justify-content:center;text-align:center;color:#2A2D4A;background:linear-gradient(135deg,#E8F2FA,#F6F4FC);border:1px dashed rgba(123,107,181,.25);border-radius:10px}.media-placeholder span{font-weight:700}.cover-media{max-height:210px;min-height:180px;margin-bottom:18px}.cover-media img{max-height:194px}.cover-media .media-placeholder{min-height:180px}.section{margin:28px 0}.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:0 0 12px}.section-title h2{margin:0;color:#2A2D4A;font-size:24px}.section-title p{margin:0;color:#6A6E88;font-size:14px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.four-col{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.split-card,.content-card,.notice-card{padding:18px}.content-card h2,.content-card h3,.split-card h2,.split-card h3,.notice-card h2,.notice-card h3{color:#2A2D4A;margin:8px 0}.content-card p,.split-card p,.notice-card p{margin:8px 0}.content-card .media-box,.split-card .media-box{height:170px;margin-bottom:12px}.stack-feature{display:grid;gap:14px}.stack-feature .media-box{height:180px}.text-link{color:#7B6BB5;font-weight:700;display:inline-flex;min-height:44px;align-items:center}.page-head{padding:24px;margin-bottom:20px;background:linear-gradient(135deg,#fff 55%,#E8F2FA);border:1px solid rgba(42,45,74,.1);border-radius:16px}.page-head p{max-width:830px;margin:0}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:start}.article{background:#fff;border:1px solid rgba(42,45,74,.1);border-radius:16px;padding:22px}.article h2{font-size:22px;color:#2A2D4A;margin:26px 0 8px}.article h2:first-child{margin-top:0}.article h3{color:#2A2D4A;margin:20px 0 6px}.article p{margin:8px 0}.article ul,.article ol{padding-left:1.2em}.aside{display:grid;gap:14px;position:sticky;top:122px}.aside .notice-card{box-shadow:none}.aside h2{font-size:17px}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.tag{background:#E8F2FA;color:#2A2D4A;border:1px solid #B8D4F0;border-radius:8px;padding:5px 9px;font-size:13px}.fact-box{background:#E8F2FA;border-left:4px solid #6BA3D6;padding:14px 16px;border-radius:0 12px 12px 0}.opinion-box{background:#F6F4FC;border-left:4px solid #7B6BB5;padding:14px 16px;border-radius:0 12px 12px 0}.term-list{display:grid;gap:14px}.term-list section{padding:16px;border:1px solid rgba(42,45,74,.1);border-radius:12px;background:#fff}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid rgba(42,45,74,.1);border-radius:14px;padding:18px}.faq-item h2{font-size:18px;margin:0 0 8px;color:#2A2D4A}.app-showcase{display:grid;grid-template-columns:340px 1fr;gap:24px;align-items:center}.app-showcase .media-box{height:420px}.mark-row{display:flex;gap:14px;align-items:center}.mark-row .media-box{width:76px;height:76px;flex:0 0 auto}.site-footer{background:#2A2D4A;color:#E8E4F6;padding:36px 0 calc(28px + env(safe-area-inset-bottom))}.footer-inner{max-width:1140px;margin:auto;padding:0 16px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:22px}.footer-brand img{height:24px;width:auto;object-fit:contain;filter:brightness(0) invert(1)}.footer-brand div{display:flex;flex-direction:column;line-height:1.2}.footer-brand span{font-size:11px;color:#C9B8E8}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-links h2{font-size:14px;margin:0 0 8px;color:#fff}.footer-links a{display:block;color:#E8E4F6;font-size:14px;min-height:32px}.footer-note{border-top:1px solid rgba(232,228,246,.16);margin:24px 0 8px;padding-top:18px;color:#C9B8E8}.copyright{margin:0;color:#C9B8E8;font-size:13px}.mobile-bottom{display:none}a:focus-visible,button:focus-visible{outline:3px solid rgba(107,163,214,.55);outline-offset:2px}@media(max-width:820px){.nation-nav{display:none}.site-main{padding-top:86px}.stage-actions{padding-right:48px}.article-layout{grid-template-columns:1fr}.aside{position:static}.four-col{grid-template-columns:1fr 1fr}.three-col{grid-template-columns:1fr}.app-showcase{grid-template-columns:1fr}.app-showcase .media-box{height:360px}.nation-box{top:55px;width:calc(100vw - 24px);height:60vh}.menu-grid{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;z-index:90;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid rgba(42,45,74,.12);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:#2A2D4A}.mobile-bottom a.is-active{background:#7B6BB5;color:#fff}.site-main{padding-bottom:86px}.site-footer{padding-bottom:calc(74px + env(safe-area-inset-bottom))}}@media(max-width:620px){.top-inner>span{font-size:10px}.brand-link{min-width:95px}.stage-actions{gap:5px;padding-right:44px}.menu-button,.app-link{padding:0 10px;font-size:13px}.two-col,.four-col{grid-template-columns:1fr}.hero{padding:18px 14px}.page-head{padding:18px}.article{padding:18px 16px}.section-title{align-items:flex-start;flex-direction:column;gap:4px}.nation-box{width:calc(100vw - 16px)}.menu-grid{grid-template-columns:1fr;gap:0}.footer-links{grid-template-columns:1fr 1fr}.search-panel{width:calc(100vw - 16px)}.cover-media{min-height:150px}.content-card .media-box,.split-card .media-box,.stack-feature .media-box{height:160px}}