:root{--bg:#1C1C1E;--deep:#141416;--card:#2A2A2E;--card2:#323238;--text:#D8D8DC;--title:#F2F2F4;--muted:#A0A0A8;--dim:#7A7A82;--silver:#C8C8D0;--blue:#6A8AAA;--line:rgba(200,200,208,.16);--focus:rgba(106,138,170,.48);--shadow:0 12px 28px rgba(0,0,0,.28)}*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit}.shell{width:min(980px,calc(100% - 32px));margin:0 auto}.site-head{position:fixed;z-index:50;top:0;left:0;right:0}.frame-news{height:20px;background:#101012;color:var(--silver);font-size:12px}.frame-news-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-btn,.menu-btn{background:none;border:0;cursor:pointer}.text-btn{padding:0 2px;font-size:12px;color:var(--silver)}.brand-bar{height:54px;background:var(--bg);border-bottom:1px solid var(--focus)}.brand-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-link{display:flex;align-items:center;min-height:44px}.brand-logo,.footer-logo{height:24px;width:auto;max-width:160px;object-fit:contain}.brand-text{font-size:16px;font-weight:700;color:var(--title)}.brand-actions{display:flex;gap:8px;align-items:center}.top-app,.menu-btn{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:8px;display:inline-flex;align-items:center}.menu-btn{background:var(--card);cursor:pointer}.frame-track{height:42px;background:var(--card)}.track-inner{height:42px;display:flex;align-items:center;justify-content:center;gap:6px}.track-inner a{height:32px;min-width:92px;display:flex;align-items:center;justify-content:center;border-radius:7px;font-size:13px}.track-inner a.active,.track-inner a:hover{background:var(--blue);color:var(--title)}.page-main{padding-top:138px;min-height:70vh}.hero{padding:46px 0 34px}.kicker{font-size:72px;line-height:.9;font-weight:800;color:rgba(200,200,208,.16);letter-spacing:-3px}.hero h1,.page-hero h1{font-size:24px;line-height:1.3;color:var(--title);margin:12px 0}.lead{max-width:760px;color:var(--silver);font-size:16px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{min-height:42px;padding:0 18px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#6A8AAA 0%,#3A4A5A 100%);color:var(--title);border:1px solid transparent}.btn.secondary{background:transparent;border-color:var(--silver)}.section{padding:34px 0;border-top:1px solid var(--line)}.section h2{margin:0 0 16px;color:var(--title);font-size:20px}.section h3{color:var(--title);font-size:16px}.section p{margin:0 0 14px}.filmstrip{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.film-cell{min-height:148px;background:var(--card);border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;padding:10px}.film-cell img{max-width:100%;max-height:128px;object-fit:contain}.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.quote-card,.gray-card,.info-card,.status-card,.memo-card,.topic-card,.method-card{background:var(--card);border:1px solid var(--line);border-radius:9px;padding:22px}.quote-card blockquote{margin:0;color:var(--silver);font-size:18px}.single-stack{display:grid;gap:14px}.two-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}.periods{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.period{background:var(--deep);border:1px solid var(--line);padding:18px;border-radius:9px}.status-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.status-card strong{display:block;color:var(--title);margin-bottom:6px}.app-center{text-align:center}.app-center .img-wrap{justify-content:center}.app-center img.content-img{max-height:320px;width:auto}.icon-img{width:48px;height:48px;object-fit:contain}.img-wrap{margin:14px 0 18px;display:flex;align-items:center;justify-content:flex-start}.content-img{display:block;max-width:100%;width:auto;height:auto;max-height:260px;object-fit:contain;object-position:center;border-radius:8px}.banner-img{max-height:200px;width:auto;max-width:100%}.page-hero{padding:34px 0 26px}.page-hero p{max-width:760px;color:var(--muted)}.number-intro{display:grid;grid-template-columns:140px 1fr;gap:26px;align-items:start}.big-number{font-size:84px;line-height:1;font-weight:800;color:rgba(200,200,208,.12)}.article{padding:26px 0 42px}.prose{max-width:820px}.prose h2{font-size:20px;color:var(--title);margin:28px 0 12px}.prose p{margin:0 0 16px}.center-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--line);padding:28px;border-radius:10px;text-align:center}.checklist{display:grid;gap:10px}.checkitem{padding:16px 18px;background:var(--card);border-left:3px solid var(--blue);border-radius:6px}.topic-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.terms section{padding:18px 0;border-bottom:1px solid var(--line)}.terms section:last-child{border-bottom:0}.faq-list{display:grid;gap:12px}.faq-item{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:18px}.faq-item h2{font-size:16px;margin:0 0 8px}.site-footer{background:#101012;border-top:1px solid var(--line);padding:34px 0 76px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:24px}.footer-grid h3{font-size:13px;color:var(--title);margin:0 0 10px}.footer-grid a{display:block;font-size:13px;color:var(--silver);padding:3px 0}.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:6px}.footer-brand span{font-size:12px;color:var(--dim)}.footer-note{margin-top:24px;border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--silver)}.overlay{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.62);opacity:0;pointer-events:none;transition:.18s}.overlay.show{opacity:1;pointer-events:auto}.modal-card{position:fixed;z-index:90;left:50%;top:50%;transform:translate(-50%,-46%);width:min(640px,92vw);max-height:84vh;overflow:auto;background:var(--card);border:1px solid var(--focus);border-radius:10px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.18s}.modal-card.show{opacity:1;transform:translate(-50%,-50%);pointer-events:auto}.modal-head,.search-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}.modal-head button,.search-head button{min-height:44px;padding:0 12px;border-radius:7px;border:1px solid var(--line);background:var(--deep);cursor:pointer}.mini-brand{display:flex;align-items:center;gap:10px}.mini-brand img{height:24px;max-width:150px;object-fit:contain}.menu-groups{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:16px}.menu-groups>div{background:var(--deep);padding:14px;border-radius:8px}.menu-groups h3{margin:0 0 8px;font-size:13px;color:var(--muted)}.menu-groups a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}.menu-groups a:last-child{border-bottom:0}.menu-groups b,.menu-groups span{display:block}.menu-groups b{font-size:14px;color:var(--title)}.menu-groups span{font-size:12px;color:var(--muted)}.search-panel{position:fixed;z-index:90;left:50%;top:78px;transform:translateX(-50%);width:min(720px,92vw);background:var(--card);border:1px solid var(--focus);border-radius:10px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.18s;padding-bottom:18px}.search-panel.show{opacity:1;pointer-events:auto}.search-panel>p{padding:0 18px}.search-links{display:flex;gap:8px;flex-wrap:wrap;padding:0 18px}.search-links a{padding:9px 14px;background:var(--deep);border:1px solid var(--line);border-radius:7px}.locked{overflow:hidden}.mobile-bottom{display:none}.site-footer a:hover,.menu-groups a:hover,.search-links a:hover,.top-app:hover{color:var(--title)}a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
@media(max-width:720px){.shell{width:min(100% - 32px,980px)}.frame-track{display:none}.page-main{padding-top:90px;padding-bottom:54px}.hero{padding-top:28px}.kicker{font-size:58px}.quote-grid,.two-cards,.periods,.status-row,.topic-list,.number-intro{grid-template-columns:1fr}.number-intro{gap:8px}.big-number{font-size:56px}.filmstrip{grid-template-columns:1fr 1fr}.film-cell{min-height:0;padding:12px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.site-footer{padding-bottom:86px}.mobile-bottom{position:fixed;z-index:60;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);min-height:48px;padding-bottom:env(safe-area-inset-bottom);background:#101012;border-top:1px solid var(--line)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:13px}.modal-card{max-height:78vh}.menu-groups{grid-template-columns:1fr}.search-panel{top:20px;width:100%;height:calc(100vh - 20px);border-radius:0;overflow:auto}.brand-actions{gap:4px}.top-app,.menu-btn{padding:0 10px}.content-img{max-height:220px}.page-hero{padding-top:26px}}