.lang-dd[data-astro-cid-a2mxz4y6]{position:relative}.lang-btn[data-astro-cid-a2mxz4y6]{list-style:none;display:inline-flex;align-items:center;gap:.4rem;min-height:36px;padding:.25rem .55rem;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-elevated);color:var(--muted);font-size:var(--fs-tiny);font-weight:600;text-transform:uppercase;letter-spacing:.03em;cursor:pointer;user-select:none;transition:border-color .15s ease,background .15s ease}.lang-btn[data-astro-cid-a2mxz4y6]::-webkit-details-marker{display:none}.lang-btn[data-astro-cid-a2mxz4y6]::marker{content:""}.lang-btn[data-astro-cid-a2mxz4y6]:hover,.lang-dd[data-astro-cid-a2mxz4y6][open] .lang-btn[data-astro-cid-a2mxz4y6]{border-color:var(--blue);background:var(--blue-50);color:var(--blue)}.lang-btn[data-astro-cid-a2mxz4y6]:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.lang-flag[data-astro-cid-a2mxz4y6]{display:block;border-radius:2px}.lang-caret[data-astro-cid-a2mxz4y6]{width:10px;height:10px;transition:transform .2s ease}.lang-dd[data-astro-cid-a2mxz4y6][open] .lang-caret[data-astro-cid-a2mxz4y6]{transform:rotate(180deg)}.lang-menu[data-astro-cid-a2mxz4y6]{position:absolute;right:0;top:calc(100% + 6px);min-width:190px;max-height:60vh;overflow-y:auto;margin:0;padding:.3rem;list-style:none;background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:60}.lang-menu[data-astro-cid-a2mxz4y6] a[data-astro-cid-a2mxz4y6]{display:flex;align-items:center;gap:.55rem;min-height:38px;padding:.45rem .6rem;border-radius:var(--radius-sm);color:var(--ink-2);text-decoration:none;font-size:var(--fs-sm);line-height:1.3;white-space:nowrap}.lang-menu[data-astro-cid-a2mxz4y6] a[data-astro-cid-a2mxz4y6]:hover,.lang-menu[data-astro-cid-a2mxz4y6] a[data-astro-cid-a2mxz4y6]:focus-visible{background:var(--blue-50);color:var(--blue-600);outline:none}.lang-menu[data-astro-cid-a2mxz4y6] a[data-astro-cid-a2mxz4y6].active{background:var(--blue);color:#fff}.lang-menu[data-astro-cid-a2mxz4y6] a[data-astro-cid-a2mxz4y6].active img[data-astro-cid-a2mxz4y6]{outline:1px solid rgba(255,255,255,.5)}.lang-name[data-astro-cid-a2mxz4y6]{flex:1}:root{--font-sans: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;--fs-tiny: .75rem;--fs-sm: .875rem;--fs-base: 1rem;--fs-lg: 1.25rem;--fs-xl: clamp(1.875rem, 2.5vw + .5rem, 2.5rem);--lh-tight: 1.25;--lh-base: 1.55;--bg: #f8fafc;--bg-soft: #f1f5f9;--bg-elevated: #ffffff;--ink-1: #0f172a;--ink-2: #334155;--ink-3: #64748b;--ink-4: #94a3b8;--navy: #0f2a43;--blue: #0f4c81;--blue-600: #0d3a63;--blue-50: #eaf2fa;--cyan-500: #06b6d4;--cyan-600: #0891b2;--cyan-50: #ecfeff;--success: #10b981;--success-bg: #ecfdf5;--warning: #f59e0b;--warning-bg: #fffbeb;--danger: #ef4444;--danger-bg: #fef2f2;--line: #e2e8f0;--line-strong: #cbd5e1;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow-md: 0 4px 12px rgba(15, 23, 42, .06);--shadow-lg: 0 12px 32px rgba(15, 23, 42, .1);--shadow-focus: 0 0 0 3px rgba(6, 182, 212, .2);--radius: 10px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-pill: 999px;--muted: var(--ink-3)}:root[data-theme=dark]{--bg: #0b1220;--bg-soft: #101a2c;--bg-elevated: #16233a;--ink-1: #e6edf6;--ink-2: #c3cedd;--ink-3: #93a3b8;--ink-4: #64748b;--navy: #e6edf6;--blue: #6fb3ee;--blue-600: #8cc4f5;--blue-50: #1b2c47;--cyan-500: #22d3ee;--cyan-600: #67e8f9;--cyan-50: #103038;--success: #34d399;--success-bg: #06281a;--warning: #fbbf24;--warning-bg: #2f2205;--danger: #f87171;--danger-bg: #340f0f;--line: #263650;--line-strong: #35496a;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .35);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .5);color-scheme:dark}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border:1px solid var(--line);border-radius:8px;background:var(--bg-elevated);color:var(--ink-2);cursor:pointer;transition:border-color .15s,color .15s}.theme-toggle:hover{border-color:var(--blue);color:var(--blue)}.theme-toggle svg{width:18px;height:18px}.theme-toggle .icon-sun{display:none}:root[data-theme=dark] .theme-toggle .icon-sun{display:block}:root[data-theme=dark] .theme-toggle .icon-moon{display:none}html[lang^=zh]{--font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Plus Jakarta Sans", system-ui, sans-serif}html[lang=ja]{--font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", "Plus Jakarta Sans", system-ui, sans-serif}html[lang=ko]{--font-sans: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", "Plus Jakarta Sans", system-ui, sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-sans);color:var(--navy);background:var(--bg-elevated);line-height:var(--lh-base);font-feature-settings:"ss01","cv11"}h1,h2,h3,h4,h5,h6{color:var(--ink-1);letter-spacing:-.01em}h1{font-size:var(--fs-xl);line-height:var(--lh-tight);font-weight:700}code,kbd,samp,pre{font-family:var(--font-mono)}a{color:var(--blue)}a:hover{color:var(--blue-600)}:focus-visible{outline:2px solid var(--cyan-500);outline-offset:2px;border-radius:var(--radius-sm)}.nc-interactive,button.nc-btn,.nc-card,.nc-stat{transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease,background-color .15s ease}.nc-interactive:hover,.nc-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.nc-interactive:active,button.nc-btn:active{transform:translateY(0) scale(.98);box-shadow:var(--shadow-sm)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}main{max-width:960px;margin:0 auto;padding:1.5rem 1rem 3rem}.site-header{display:flex;flex-direction:column;gap:0;border-bottom:1px solid var(--line);padding:.75rem 1rem 0;position:relative;z-index:20;background:var(--bg-elevated)}.header-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.header-search{flex:1 1 240px;min-width:200px;max-width:480px}.header-right{display:flex;align-items:center;gap:.9rem;margin-left:auto}.site-header .brand{font-weight:700;color:var(--navy);text-decoration:none;font-size:1.05rem;white-space:nowrap}.main-nav{display:flex;gap:.25rem;flex-wrap:wrap;align-items:stretch;padding:.5rem 0 .75rem}.nav-dropdown{position:relative}.nav-summary{list-style:none;cursor:pointer;padding:.5rem .75rem;border-radius:8px;color:var(--blue);font-size:.95rem;font-weight:500;display:inline-flex;align-items:center;gap:.4rem;user-select:none;transition:background .15s,color .15s}.nav-summary::-webkit-details-marker{display:none}.nav-summary::marker{display:none;content:""}.nav-summary:hover{background:var(--blue-50);color:var(--blue-600)}.nav-summary:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.nav-caret{width:10px;height:10px;transition:transform .2s ease;color:currentColor}.nav-dropdown[open]>.nav-summary{background:var(--blue-50);color:var(--blue-600)}.nav-dropdown[open]>.nav-summary .nav-caret{transform:rotate(180deg)}.nav-menu{position:absolute;top:calc(100% + 4px);left:0;min-width:240px;background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:.4rem;display:flex;flex-direction:column;gap:1px;z-index:30;max-height:70vh;overflow-y:auto}.nav-link{color:var(--navy);text-decoration:none;font-size:.92rem;padding:.55rem .7rem;border-radius:6px;display:block;transition:background .12s,color .12s;line-height:1.3}.nav-link:hover,.nav-link:focus-visible{background:var(--blue-50);color:var(--blue-600);outline:none}.nav-link-plain{display:inline-flex;align-items:center;padding:.5rem .75rem;color:var(--blue);font-weight:500;border-radius:8px}.nav-link-plain:hover{background:var(--blue-50);color:var(--blue-600)}.nav-toggle{display:none}.nav-burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:8px;border:1px solid var(--line);border-radius:6px;cursor:pointer}.burger-line{display:block;height:2px;width:100%;background:var(--navy);border-radius:1px;transition:transform .2s,opacity .2s}.nav-overlay{display:none}.nc-search{position:relative;width:100%}.nc-search-field{display:flex;align-items:center;gap:.5rem;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:.45rem .7rem;transition:border-color .15s,box-shadow .15s,background .15s}.nc-search-field:focus-within{background:var(--bg-elevated);border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-50)}.nc-search-icon{width:18px;height:18px;color:var(--muted);flex-shrink:0}.nc-search-field:focus-within .nc-search-icon{color:var(--blue)}.nc-search-field input{flex:1;border:0;outline:0;background:transparent;font:inherit;color:var(--navy);font-size:.95rem;min-width:0}.nc-search-field input::-webkit-search-cancel-button{display:none}.nc-search-field input::placeholder{color:var(--muted)}.nc-search-kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.75rem;color:var(--muted);background:var(--bg-elevated);border:1px solid var(--line);border-radius:4px;padding:.05rem .4rem;line-height:1.4}.nc-search-results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);max-height:70vh;overflow-y:auto;z-index:40;padding:.4rem}.nc-search-group-title{font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:.55rem .7rem .35rem}.nc-search-item{display:flex;align-items:center;gap:.6rem;padding:.55rem .7rem;border-radius:6px;color:var(--navy);text-decoration:none;font-size:.92rem;line-height:1.3}.nc-search-item.is-active,.nc-search-item:hover{background:var(--blue-50);color:var(--blue-600)}.nc-search-item mark{background:transparent;color:var(--blue-600);font-weight:600;padding:0}.nc-search-badge{flex-shrink:0;width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;border-radius:5px;font-size:.7rem;font-weight:700}.nc-search-badge-guide{background:#6b8e23}.nc-search-title{flex:1}.nc-search-empty{padding:.7rem .8rem}.nc-search-empty-title{font-size:.92rem;color:var(--navy);margin-bottom:.2rem}.nc-search-empty-hint{font-size:.85rem;color:var(--muted)}@media(max-width:880px){.header-search{order:3;flex-basis:100%;max-width:100%;margin-top:.25rem}.header-right{margin-left:auto}}@media(max-width:719px){.nav-burger{display:flex}.main-nav{display:none;flex-direction:column;gap:0;padding:0;margin:0 -1rem;align-items:stretch}.nav-dropdown{position:static}.nav-summary{width:100%;justify-content:space-between;padding:.85rem 1.25rem;border-radius:0;border-top:1px solid var(--line)}.nav-menu{position:static;box-shadow:none;border:0;border-radius:0;padding:0;background:var(--bg-soft);max-height:none}.nav-link{padding:.7rem 2rem;border-radius:0}.nav-link-plain{padding:.85rem 1.25rem;border-radius:0;border-top:1px solid var(--line);width:100%}.nav-toggle:checked~.site-header .main-nav{display:flex}.nav-toggle:checked~.site-header .nav-burger .burger-line:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle:checked~.site-header .nav-burger .burger-line:nth-child(2){opacity:0}.nav-toggle:checked~.site-header .nav-burger .burger-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.nav-overlay{display:none;position:fixed;inset:0;background:#0f2a4359;z-index:10}.nav-toggle:checked~.nav-overlay{display:block}}.hero{padding:2.5rem 0 1.5rem}.hero h1{font-size:2rem;margin:0 0 .75rem}.hero p{color:var(--muted);max-width:42rem;margin:0 0 1.25rem}.cta{display:inline-block;background:var(--blue);color:#fff;padding:.7rem 1.3rem;border-radius:8px;text-decoration:none;font-weight:600}.cta:hover{background:var(--blue-600)}.cta-row{display:flex;gap:.8rem;flex-wrap:wrap}.cta.secondary{background:var(--bg-elevated);color:var(--blue);border:1px solid var(--blue)}.cta.secondary:hover{background:var(--bg-soft)}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin:1.5rem 0}.feature{border:1px solid var(--line);border-radius:10px;padding:1rem 1.2rem;background:var(--bg-soft)}.feature h2{font-size:1.05rem;margin:0 0 .4rem}.feature p{margin:0;color:var(--muted);font-size:.92rem}.soon{border:1px solid var(--line);border-radius:10px;padding:1rem 1.2rem;color:var(--muted);display:grid;gap:.5rem}.soon h2{font-size:1rem;margin:0;color:var(--navy)}h1{font-size:1.6rem}.lead{color:var(--muted);font-size:1.05rem}.faq{margin-top:2.5rem}.faq h2{font-size:1.2rem}.ref-h2{font-size:1.2rem;margin-top:2.5rem}.ref-table-wrap{overflow-x:auto;margin:.6rem 0 .4rem}.ref-table{border-collapse:collapse;width:100%;font-size:.85rem;font-family:var(--font-mono);font-variant-numeric:tabular-nums}.ref-table th,.ref-table td{border:1px solid var(--line);padding:.28rem .55rem;text-align:right;white-space:nowrap}.ref-table th{background:var(--bg-soft);font-family:var(--font-sans);font-weight:600}.ref-table td:first-child,.ref-table th:first-child{text-align:left}.ref-note{color:var(--muted);font-size:.85rem}.deep h2{font-size:1.2rem;margin-top:2.5rem}.deep-body p{margin:.6rem 0}.deep-body ul,.deep-body ol{margin:.6rem 0;padding-left:1.4rem}.related-links{margin-top:1.4rem;font-size:.92rem}.faq details{border-bottom:1px solid var(--line);padding:.6rem 0}.faq summary{cursor:pointer;font-weight:600}.faq p{color:var(--muted);margin:.5rem 0 0}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.85rem;padding:1rem;text-align:center}.footer-nav{display:flex;gap:1rem;justify-content:center;margin-bottom:.5rem;flex-wrap:wrap}.footer-nav a{color:var(--muted);text-decoration:none}.footer-nav a:hover{color:var(--blue)}.footer-link-btn{background:none;border:none;padding:0;color:var(--muted);font:inherit;font-size:.85rem;cursor:pointer;text-decoration:underline}.footer-link-btn:hover{color:var(--blue)}.consent-banner{position:fixed;inset:auto 0 0;z-index:50;background:#0f2a438c;padding:1rem;display:flex;justify-content:center}.consent-banner[hidden]{display:none}.consent-box{background:var(--bg-elevated);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 32px #0f2a4340;max-width:640px;width:100%;padding:1rem 1.2rem;display:grid;gap:.8rem;max-height:85vh;overflow:auto}.consent-msg{margin:0;font-size:.92rem}.consent-msg a{color:var(--blue)}.consent-options{display:grid;gap:.5rem}.consent-opt{display:flex;gap:.6rem;align-items:flex-start;border:1px solid var(--line);border-radius:8px;padding:.5rem .7rem;cursor:pointer}.consent-opt input{margin-top:.25rem}.consent-opt strong{display:block;font-size:.9rem}.consent-opt small{color:var(--muted)}.consent-necessary{cursor:default;background:var(--bg-soft)}.consent-actions{display:flex;gap:.6rem;flex-wrap:wrap}.consent-btn{padding:.5rem 1rem;border-radius:6px;border:1px solid var(--line-strong);background:var(--bg-elevated);color:var(--navy);font-size:.9rem;cursor:pointer}.consent-btn:hover{border-color:var(--blue)}.consent-btn.primary{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}.consent-btn.primary:hover{background:var(--blue-600)}.co-frac{display:inline-flex;flex-direction:column;gap:.2rem}.print-header,.print-footer{display:none}@media print{:root[data-theme=dark]{--bg: #fff;--bg-soft: #f7f8fa;--bg-elevated: #fff;--ink-1: #0f172a;--ink-2: #334155;--ink-3: #64748b;--ink-4: #94a3b8;--navy: #0f2a43;--blue: #0f4c81;--blue-600: #0d3a63;--blue-50: #eaf2fa;--line: #e2e8f0;--line-strong: #cbd5e1;--success: #0d7a43;--success-bg: #ecf9f1;--warning: #9a6700;--warning-bg: #fff8e1;--danger: #b42318;--danger-bg: #fdecec}.theme-toggle{display:none}.site-header,.site-footer,.co-actions,.lang-dd,.nav-overlay,.consent-banner,.nc-search{display:none!important}.nav-toggle:checked~.site-header .main-nav{display:none!important}.print-header{display:flex!important;align-items:baseline;justify-content:space-between;gap:1rem;border-bottom:1.5pt solid #0f4c81;padding-bottom:4pt;margin:0 0 10pt}.print-brand{font-weight:700;font-size:12pt;color:#0f2a43;letter-spacing:-.01em}.print-meta{font-size:8.5pt;color:#475569}.print-footer{display:block!important;border-top:.75pt solid #cbd5e1;margin-top:10pt;padding-top:4pt;font-size:8pt;color:#475569;text-align:center}main{max-width:none;padding:0}table,.ref-table{page-break-inside:auto}tr{page-break-inside:avoid;page-break-after:auto}thead{display:table-header-group}h1{font-size:15pt}h2{font-size:11pt;page-break-after:avoid}a{text-decoration:none;color:inherit}}