:root{--bg:#F3F6F9;--surface:#FFFFFF;--surface-2:#E8EEF5;--ink:#0B1220;--text:#1E293B;--muted:#475569;--soft:#64748B;--blue:#2563EB;--blue-2:#60A5FA;--blue-3:#1D4ED8;--lime:#65A30D;--slate:#334155;--border:rgba(37,99,235,.16);--shadow:0 14px 36px rgba(11,18,32,.08);--max:1180px;--signal:18px;--machine:62px;--tabs:40px}*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(var(--max),calc(100% - 32px));margin-inline:auto}.site-header{position:fixed;inset:0 0 auto;z-index:80}.signal-line{height:var(--signal);background:var(--slate);color:#fff;font-size:11px;line-height:18px}.signal-inner{display:flex;align-items:center;justify-content:space-between;height:100%}.signal-search{border:0;background:transparent;color:#fff;padding:0 4px;height:18px;line-height:18px}.machine-bar{height:var(--machine);background:#fff;border-bottom:1px solid var(--border)}.machine-inner{height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand-link{justify-self:start;display:flex;align-items:center;min-height:44px}.brand-mark{display:block;max-width:180px;height:32px;object-fit:contain;object-position:left center}.brand-text{font-weight:900;font-size:22px;color:var(--ink);letter-spacing:-.04em}.machine-menu,.app-link{min-height:44px;border-radius:10px;border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;padding:0 18px;font-weight:750}.machine-menu{background:#fff;color:var(--blue)}.app-link{justify-self:end;background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);color:#fff;border-color:transparent}.key-tabs{height:var(--tabs);background:#F8FAFC;border-bottom:1px solid var(--border)}.key-tabs-inner{height:100%;display:flex;align-items:center;gap:4px}.key-tabs a{height:30px;display:inline-flex;align-items:center;padding:0 12px;border-radius:7px;color:var(--slate);font-size:14px;font-weight:700}.key-tabs a:hover,.key-tabs a:focus-visible{background:var(--surface-2);outline:none}.key-tabs a.is-current{background:var(--blue);color:#fff}.site-main{padding-top:calc(var(--signal) + var(--machine) + var(--tabs));min-height:70vh}.hero,.page-hero{padding:34px 0 22px}.cover-slot{max-height:300px;aspect-ratio:16/9}.media-slot{width:100%;background:#eef2f6;border:1px solid var(--border);border-radius:16px;overflow:hidden;display:flex;align-items:center;justify-content:center}.media-slot img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.media-placeholder{width:100%;height:100%;min-height:180px;background:linear-gradient(145deg,#edf2f7,#f8fafc);position:relative}.media-placeholder:after{content:"91APP";position:absolute;inset:auto 18px 16px;color:var(--slate);font-weight:850;letter-spacing:.08em}.content-media{height:220px}.content-media.tall{height:420px}.content-media.compact{height:190px}.cover-slot .media-placeholder{min-height:260px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:850;letter-spacing:.12em;text-transform:uppercase}.eyebrow:before{content:"";width:18px;height:4px;border-radius:50%;background:var(--lime)}h1,h2,h3{color:var(--ink);line-height:1.25;margin:0 0 12px}h1{font-size:clamp(28px,4vw,32px);letter-spacing:-.03em}h2{font-size:clamp(21px,2.5vw,26px)}h3{font-size:18px}p{margin:0 0 14px}.lead{font-size:17px;color:var(--muted);max-width:820px}.hero-copy{padding-top:22px}.hero-copy .lead{max-width:900px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn{min-height:44px;padding:0 18px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;border:1px solid var(--border)}.btn-primary{background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);color:#fff;border-color:transparent}.btn-secondary{background:#fff;color:var(--blue)}.btn:hover,.btn:focus-visible{transform:translateY(-1px);box-shadow:0 8px 22px rgba(37,99,235,.16);outline:3px solid rgba(96,165,250,.3);outline-offset:2px}.section{padding:26px 0}.section.alt{background:#fff;border-block:1px solid rgba(37,99,235,.09)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px}.section-head p{color:var(--muted);max-width:680px}.grid-2,.grid-3,.grid-4{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.card p{color:var(--muted)}.card .mini-link,.text-link{color:var(--blue);font-weight:800;display:inline-flex;align-items:center;min-height:40px}.card .mini-link:after,.text-link:after{content:"→";margin-left:6px}.key-card{box-shadow:none;min-height:150px}.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:8px;background:var(--blue)}.dot.lime{background:var(--lime)}.number-list{display:grid;gap:10px}.number-item{display:grid;grid-template-columns:74px 1fr;gap:14px;align-items:start;background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px}.number{font-size:34px;line-height:1;color:var(--blue);font-weight:900;letter-spacing:-.05em}.number-item p{color:var(--muted)}.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:24px;align-items:center}.file-list{display:grid;gap:10px}.file-row{display:grid;grid-template-columns:minmax(150px,.8fr) 1.5fr auto;align-items:center;gap:16px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}.file-row strong{color:var(--ink)}.file-row span{color:var(--muted)}.status{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:0 10px;border-radius:8px;background:var(--surface-2);color:var(--blue);font-size:13px;font-weight:800}.step-list{counter-reset:step;display:grid;gap:14px}.step{counter-increment:step;background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px 20px 20px 76px;position:relative}.step:before{content:counter(step,decimal-leading-zero);position:absolute;left:20px;top:22px;color:var(--blue);font-weight:900;font-size:25px}.longread{background:#fff;border:1px solid var(--border);border-radius:16px;padding:clamp(20px,4vw,36px)}.longread p{color:#334155}.longread h2{margin-top:28px}.note{border-left:4px solid var(--blue);background:#EFF6FF;padding:14px 16px;border-radius:0 12px 12px 0;color:var(--slate)}.tag-row{display:flex;gap:8px;flex-wrap:wrap}.tag{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border-radius:8px;background:#E8EEF5;color:var(--slate);font-size:13px;font-weight:750}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.faq-item h2{font-size:18px}.faq-item p{color:var(--muted);margin-bottom:0}.service-strip{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}.service-strip .card{box-shadow:none}.site-footer{background:#0B1220;color:#D6E4FF;padding:38px 0 calc(26px + env(safe-area-inset-bottom))}.footer-brand{display:grid;grid-template-columns:1fr 2fr;gap:24px;align-items:center;padding-bottom:26px;border-bottom:1px solid rgba(214,228,255,.14)}.footer-brand-lockup{display:flex;align-items:center;gap:12px}.footer-mark{height:30px;max-width:170px;object-fit:contain}.footer-brand-lockup div{display:grid}.footer-brand-lockup strong{font-size:20px}.footer-brand-lockup span{font-size:12px;color:#94A3B8}.footer-brand p{margin:0;color:#B6C8E6}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 0}.footer-links section{display:grid;align-content:start;gap:7px}.footer-links h2{font-size:14px;color:#fff;margin-bottom:4px}.footer-links a{font-size:14px;color:#B6C8E6}.footer-links a:hover,.footer-links a:focus-visible{color:#fff;text-decoration:underline;outline:none}.footer-bottom{display:flex;gap:16px;flex-wrap:wrap;padding-top:18px;border-top:1px solid rgba(214,228,255,.14);font-size:13px;color:#94A3B8}.page-overlay{position:fixed;inset:0;background:rgba(11,18,32,.46);z-index:89;opacity:0;visibility:hidden;pointer-events:none;transition:.22s}.page-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.site-drawer{position:fixed;z-index:100;top:0;right:0;width:min(400px,86vw);height:100dvh;background:#F8FAFC;box-shadow:-24px 0 60px rgba(11,18,32,.2);transform:translateX(104%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s;overflow:auto;padding:16px}.site-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:-16px;z-index:2;background:#F8FAFC;display:flex;align-items:center;justify-content:space-between;padding:16px 0 12px;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand img{height:30px;max-width:150px;object-fit:contain}.icon-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--ink);font-size:28px;line-height:1}.drawer-groups{display:grid;gap:12px;padding:14px 0}.machine-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px}.machine-card h2{font-size:14px;color:var(--blue);margin-bottom:8px}.machine-card a{display:grid;grid-template-columns:74px 1fr;gap:10px;padding:9px 6px;border-radius:8px}.machine-card a:hover,.machine-card a:focus-visible{background:#EFF6FF;outline:none}.machine-card strong{font-size:14px;color:var(--ink)}.machine-card span{font-size:12px;color:var(--muted);line-height:1.5}.search-panel{position:fixed;z-index:95;top:calc(var(--signal) + var(--machine));left:0;right:0;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-12px);transition:.2s}.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:translateY(0)}.search-card{background:#fff;border:1px solid var(--border);border-radius:0 0 14px 14px;padding:22px;box-shadow:var(--shadow)}.search-head{display:flex;justify-content:space-between;gap:16px;align-items:start}.search-head h2{margin-bottom:0}.search-box{display:grid;gap:6px;margin-top:16px;color:var(--muted);font-size:13px}.search-box input{height:48px;border:1px solid var(--border);border-radius:10px;padding:0 14px;background:#F8FAFC;color:var(--ink);outline:none}.search-box input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(96,165,250,.25)}.search-presets{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.search-presets a{background:#F8FAFC;border:1px solid var(--border);border-radius:10px;padding:12px;display:grid;font-weight:800;color:var(--ink)}.search-presets a span{font-size:12px;font-weight:500;color:var(--muted)}.search-presets a:hover,.search-presets a:focus-visible{background:#EFF6FF;outline:2px solid rgba(37,99,235,.2)}html.panel-open{overflow:hidden}.mobile-nav{display:none}.legal-list{display:grid;gap:14px}.legal-item{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.legal-item h2{font-size:19px}.legal-item p:last-child{margin-bottom:0}.mini-stat{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.mini-stat .card{text-align:left;box-shadow:none}.mini-stat .number{font-size:32px}.article-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.article-index a{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px;display:grid;gap:6px}.article-index a span{color:var(--muted);font-size:14px}.article-index a:hover,.article-index a:focus-visible{outline:3px solid rgba(96,165,250,.24)}@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}.search-presets{grid-template-columns:repeat(2,1fr)}.mini-stat{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-template-columns:1fr}.footer-links{grid-template-columns:repeat(2,1fr)}.service-strip{grid-template-columns:1fr}.file-row{grid-template-columns:1fr auto}.file-row span{grid-column:1/-1}.content-media.tall{height:360px}}@media(max-width:640px){:root{--tabs:0px}.shell{width:min(var(--max),calc(100% - 32px))}.key-tabs{display:none}.site-main{padding-top:calc(var(--signal) + var(--machine));padding-bottom:calc(58px + env(safe-area-inset-bottom))}.machine-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:6px}.brand-mark{max-width:112px;height:28px}.machine-menu,.app-link{padding:0 11px;font-size:13px}.hero,.page-hero{padding-top:24px}.cover-slot{max-height:300px;aspect-ratio:3/2}.cover-slot .media-placeholder{min-height:210px}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.key-card{min-height:auto}.section-head{display:block}.number-item{grid-template-columns:56px 1fr;padding:16px}.number{font-size:28px}.file-row{grid-template-columns:1fr}.file-row .status{justify-self:start}.article-index{grid-template-columns:1fr}.mini-stat{grid-template-columns:1fr}.content-media{height:200px}.content-media.compact{height:190px}.content-media.tall{height:380px}.footer-links{grid-template-columns:repeat(2,1fr)}.site-footer{padding-bottom:calc(82px + env(safe-area-inset-bottom))}.search-panel{top:0;height:100dvh;background:#E8EEF5;overflow:auto}.search-card{width:100%;min-height:100dvh;border:0;border-radius:0;background:#E8EEF5;padding-top:calc(20px + env(safe-area-inset-top))}.search-presets{grid-template-columns:1fr}.mobile-nav{position:fixed;z-index:70;display:grid;grid-template-columns:repeat(5,1fr);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 var(--border)}.mobile-nav a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;font-weight:800;color:var(--slate)}.mobile-nav a.is-current{background:var(--blue);color:#fff}.site-drawer{z-index:100}.step{padding-left:66px}.footer-bottom{display:grid;gap:6px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}