:root{--blue:#1e40af;--blue-2:#2563eb;--blue-soft:#dbeafe;--blue-line:#bfdbfe;--sky-top:#cfe5ff;--sky-mid:#eaf4ff;--cloud:#f5f9ff;--ink:#1f2a44;--muted:#3b4a66;--navy:#0f2a5c;--sun:#fde68a;--radius:26px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;color:var(--ink);line-height:1.85;font-size:16.5px;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(180deg,var(--sky-top) 0,var(--sky-mid) 420px,#f7fbff 900px,#f7fbff 100%);min-height:100vh;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:var(--blue)}.wrap{width:100%;max-width:1080px;margin:0 auto;padding-left:16px;padding-right:16px}@media(min-width:768px){.wrap{padding-left:28px;padding-right:28px}}.sky{position:absolute;inset:0 0 auto;height:520px;overflow:hidden;pointer-events:none;z-index:0}.cloud{position:absolute;background:#fff;border-radius:999px;opacity:.75;filter:blur(1px)}.cloud:before,.cloud:after{content:"";position:absolute;background:#fff;border-radius:50%}.c1{width:180px;height:46px;top:110px;left:6%}.c1:before{width:80px;height:80px;top:-40px;left:28px}.c1:after{width:56px;height:56px;top:-24px;left:96px}.c2{width:240px;height:56px;top:62px;right:8%;opacity:.6}.c2:before{width:104px;height:104px;top:-54px;left:44px}.c2:after{width:70px;height:70px;top:-30px;left:136px}.c3{width:140px;height:38px;top:300px;left:44%;opacity:.5}.c3:before{width:62px;height:62px;top:-30px;left:22px}.c3:after{width:44px;height:44px;top:-18px;left:74px}@media(prefers-reduced-motion:no-preference){.cloud{animation:drift 26s ease-in-out infinite alternate}.c2{animation-duration:34s}.c3{animation-duration:30s}}@keyframes drift{0%{transform:translate(0)}to{transform:translate(40px)}}@media(max-width:640px){.c2,.c3{display:none}.c1{left:-40px}}.top{position:sticky;top:0;z-index:20;background:#ffffffd1;backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid rgba(191,219,254,.7)}.top-in{display:flex;align-items:center;gap:18px;min-height:62px}.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--navy);font-weight:800;font-size:1.18rem;letter-spacing:.04em;flex-shrink:0}.nav{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;margin-left:auto;padding:6px 0}.nav::-webkit-scrollbar{display:none}.nav a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:.92rem;padding:7px 14px;border-radius:999px;transition:background .2s,color .2s}.nav a:hover{background:var(--blue-soft);color:var(--blue)}.nav a[aria-current=page]{background:var(--blue);color:#fff}@media(max-width:760px){.top-in{flex-wrap:wrap;gap:0;padding-top:8px}.nav{margin-left:0;width:100%}}main{position:relative;z-index:1}.crumbs{display:flex;gap:8px;align-items:center;font-size:.88rem;color:var(--muted);margin:18px 0 0}.crumbs a{color:var(--blue);text-decoration:none}.crumbs a:hover{text-decoration:underline}.hero{display:grid;gap:22px;align-items:center;padding:26px 0 30px}@media(min-width:900px){.hero{grid-template-columns:1.05fr .95fr;gap:40px;padding:40px 0 44px}}.badge{display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;padding:6px 14px;border-radius:999px;background:#ffffffd9;border:1px solid var(--blue-line);color:var(--blue);font-size:.86rem;font-weight:600}.dot{width:8px;height:8px;border-radius:50%;background:var(--blue-2);box-shadow:0 0 0 4px #2563eb2e}.hero h1{margin:0;font-size:1.9rem;line-height:1.35;color:var(--navy);letter-spacing:.01em}@media(min-width:900px){.hero h1{font-size:2.45rem}}.updated{margin:12px 0 0;color:var(--muted);font-size:.9rem}.hero-pic{margin:0 auto;width:100%;position:relative}.hero-pic img{border-radius:var(--radius);border:6px solid #fff;box-shadow:0 18px 40px #1e40af2e}.hero-pic:after{content:"✦";position:absolute;top:-14px;right:10px;color:#fff;font-size:28px;text-shadow:0 0 12px rgba(37,99,235,.6)}.paper{background:#fff;border-radius:var(--radius);border:1px solid var(--blue-line);box-shadow:0 10px 30px #0f2a5c12;padding:26px 18px 30px;margin-bottom:64px}@media(min-width:768px){.paper{padding:40px 52px 46px}}.prose>*:first-child{margin-top:0}.prose p{margin:0 0 1.05em}.prose h2{scroll-margin-top:84px;position:relative;margin:2.1em 0 .8em;padding:.45em .9em .45em 1.1em;font-size:1.32rem;line-height:1.45;color:var(--navy);background:linear-gradient(90deg,var(--blue-soft),rgba(219,234,254,0));border-radius:14px}.prose h2:before{content:"";position:absolute;left:0;top:.5em;bottom:.5em;width:5px;border-radius:5px;background:var(--blue-2)}.prose h3{margin:1.6em 0 .55em;font-size:1.12rem;color:var(--blue);line-height:1.5}.prose h3:before{content:"✦ ";color:#93c5fd;font-size:.9em}.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1.1em}.prose li{margin:.35em 0}.prose li::marker{color:var(--blue-2)}.prose strong{color:var(--navy)}.prose a{text-decoration:underline;text-decoration-color:#93c5fd;text-underline-offset:3px}.prose a:hover{text-decoration-color:var(--blue)}.prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:1em 0 1.4em;font-size:.93rem;border-radius:14px;border:1px solid var(--blue-line);-webkit-overflow-scrolling:touch}.prose thead th{background:var(--blue);color:#fff;font-weight:600;white-space:nowrap}.prose th,.prose td{padding:.62em .85em;text-align:left;border-bottom:1px solid #e3eefe}.prose tbody tr:nth-child(2n){background:var(--cloud)}.prose td{white-space:nowrap}.prose td:first-child{font-weight:600;color:var(--navy)}.pic{margin:1.6em auto;width:100%}.pic img{border-radius:20px;border:5px solid var(--cloud);box-shadow:0 10px 26px #1e40af24}.go{margin:.4em 0 1.6em}.go-btn{display:inline-flex;align-items:center;gap:10px;padding:11px 24px;border-radius:999px;text-decoration:none!important;color:#fff!important;font-weight:700;background:linear-gradient(135deg,#1e40af,#1d4ed8 55%,#1e3a8a);box-shadow:0 8px 20px #1e40af47,inset 0 1px #ffffff40;transition:transform .15s,box-shadow .15s}.go-btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px #1e40af57}.go-btn span{font-size:1.05em}.foot{position:relative;margin-top:20px}.wave{display:block;width:100%;height:60px}.foot-in{background:var(--navy);color:#dbe7ff;padding:26px 0 30px}.foot-grid{display:grid;gap:24px}@media(min-width:860px){.foot-grid{grid-template-columns:1.5fr 1fr}}.foot-name{margin:0 0 8px;font-size:1.2rem;font-weight:800;color:#fff}.foot p{margin:0;font-size:.92rem;line-height:1.8}.foot-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px;align-content:start}.foot-nav a{color:#dbe7ff;text-decoration:none;font-size:.92rem}.foot-nav a:hover{color:#fff;text-decoration:underline}.foot .foot-copy{margin:22px auto 0;padding-top:16px;border-top:1px solid rgba(219,231,255,.2);font-size:.84rem;color:#c7d6f5}