:root{color-scheme:light;--ink:#1b2b45;--muted:#485b78;--blue:#214a8b;--line:#dce6f5;--white:#fff;font-family:"Geist","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;background:#fcfdff;color:var(--ink);line-height:1.68}img{display:block;width:100%;height:auto}h1,h2,h3,p,figure{margin:0}a{color:var(--blue);text-underline-offset:.23em}a:focus-visible{outline:3px solid #336ad1;outline-offset:5px}code{font-size:1em;overflow-wrap:anywhere}.wrap{width:min(1160px,calc(100% - 4rem));margin-inline:auto}.mast{border-bottom:1px solid #e3ebf5;background:#fff}.mast .wrap,.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:68px}.wordmark{font-weight:850;text-decoration:none;font-size:1.25rem;letter-spacing:-.035em;color:var(--ink)}nav{display:flex;gap:clamp(.72rem,2.5vw,1.8rem);flex-wrap:wrap}nav a,nav span{font-size:.88rem;font-weight:700}.mast nav a{text-decoration:none}.mast nav a:hover{text-decoration:underline}.skip{position:absolute;left:1rem;top:1rem;z-index:5;background:white;padding:.5rem .8rem;transform:translateY(-180%)}.skip:focus{transform:none}
.hero{position:relative;isolation:isolate;overflow:hidden;background:radial-gradient(ellipse at 78% 36%,#d8ebff 0,transparent 43%),radial-gradient(ellipse at 52% 60%,#ffe4ef 0,transparent 52%),linear-gradient(180deg,#fff,#f9fbff);border-bottom:1px solid #eaf1fa}
.hero .wrap{display:grid;grid-template-columns:1fr 1.08fr;align-items:center;min-height:480px;padding-block:2rem}
.hero-copy{position:relative;z-index:1;padding:1.5rem 0}.eyebrow{display:inline-block;font-size:.92rem;font-weight:800;color:#37578a;margin-bottom:.4rem;letter-spacing:.07em}.hero h1{font-size:clamp(3.3rem,7.1vw,6.5rem);line-height:.97;letter-spacing:-.08em;color:#182a4a;font-weight:880}.hero p{max-width:28em;margin-top:1.2rem;color:var(--muted);font-size:1.1rem}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:.9rem;margin-top:1.6rem}.action{display:inline-flex;min-height:48px;align-items:center;justify-content:center;border-radius:99px;background:#244e95;color:white;text-decoration:none;padding:.64em 1.25em;font-weight:800;box-shadow:0 7px 20px #28549a26;transition:background-color .2s,transform .2s}.action:hover{background:#183e7a;transform:translateY(-2px)}.action.alt{background:#fff9;color:#234679;box-shadow:inset 0 0 0 1px #a9bddf}
.hero-art{position:relative;min-width:0;padding:.35rem 0}.hero-art::before{content:"";position:absolute;inset:22% 6% 17%;border-radius:50%;background:#fdf9ffb0;filter:blur(26px);pointer-events:none}.hero-art img{position:relative;filter:drop-shadow(0 22px 28px #5479b440);animation:float-cloud 7s 850ms ease-in-out infinite both}.hero-art::after{content:"";position:absolute;width:29%;height:36%;border-radius:50%;top:35%;left:43%;pointer-events:none;background:#ffffff56;filter:blur(22px);mix-blend-mode:screen;animation:light-cloud 8s 1s ease-in-out infinite}
@keyframes float-cloud{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-11px) rotate(-1.7deg)}}@keyframes light-cloud{0%,100%{opacity:.16;transform:translateX(-10%)}50%{opacity:.58;transform:translateX(22%)}}
.journey{padding-block:3.5rem}.section-intro{display:flex;justify-content:space-between;align-items:end;gap:14px;margin-bottom:1.25rem}.section-intro h2,.address-panel h2{font-size:clamp(1.7rem,4vw,2.7rem);letter-spacing:-.05em;line-height:1.17}.section-intro p{color:var(--muted)}.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.3rem;position:relative}.steps::before{content:"";position:absolute;height:2px;left:9%;right:9%;top:48px;background:linear-gradient(90deg,#c7dffe,#eabfdf,#c7dffe)}.steps li{position:relative;display:grid;justify-items:start;grid-template-rows:auto auto 1fr auto;align-content:start;border:1px solid #d7e5f7;border-radius:32px;padding:1.1rem 1.35rem;background:linear-gradient(155deg,#fff 5%,#f2f8ff 70%,#fff2f8);box-shadow:inset 0 2px 4px #fff,0 12px 26px #41699613}.steps li:nth-child(2){background:linear-gradient(153deg,#fff,#fff0f7 75%,#f4f8ff)}.steps img{width:88px;height:64px;object-fit:contain;object-position:left center;margin-bottom:.45rem}.steps h3{font-size:1.19rem}.steps p{color:var(--muted);margin-top:.25rem}.steps a{align-self:end;margin-top:.55rem;font-weight:750}
.address-band{background:linear-gradient(115deg,#fff2f8,#eff7ff 74%);border-block:1px solid #e3ebf6}.address-panel{padding-block:2.55rem;display:grid;grid-template-columns:.78fr 1.3fr;gap:2.4rem;align-items:start}.address-panel p{margin-top:.65rem;color:var(--muted);max-width:25rem}.addresses{margin:0;border-radius:27px;background:#ffffffb0;box-shadow:inset 0 1px 4px #fff;border:1px solid #fff;overflow:hidden}.addresses div{padding:.78rem 1.1rem;display:grid;grid-template-columns:5.8rem minmax(0,1fr);gap:.7rem}.addresses div+div{border-top:1px solid #dae4f2}.addresses dt{font-weight:800}.addresses dd{margin:0}.addresses code{font-weight:770;color:#244780}.addresses small{display:block;color:var(--muted)}.guide-section{padding-block:3.1rem}.guide-list{display:grid;gap:.55rem}.guide-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:.9rem 1.2rem}.guide-item h3{font-size:1.05rem}.guide-item p{color:var(--muted);font-size:.92rem;margin-top:.2rem}.site-footer{border-top:1px solid var(--line);background:#f0f6ff;color:var(--muted)}.site-footer .wrap{padding-block:1rem}.site-footer p{font-size:.87rem}.site-footer nav{flex-shrink:0}
.story{width:min(820px,calc(100% - 4rem));margin-inline:auto;padding-block:1.6rem 3.3rem}.crumbs{margin-bottom:1.1rem}.article-sheet{padding:clamp(1.15rem,4.5vw,3rem);border:1px solid var(--line);border-radius:29px;background:linear-gradient(135deg,#fff 70%,#f4f9ff);box-shadow:0 16px 46px #5277a813}.article-sheet h1{font-size:clamp(1.92rem,5.3vw,3.4rem);line-height:1.18;letter-spacing:-.055em}.article-sheet h2{font-size:1.35rem;margin-block:1.2em .34em}.article-sheet time{font-size:.85rem;color:var(--muted)}.article-prose{margin-top:1.1rem}.article-prose p+p{margin-top:.65rem}.answer{background:linear-gradient(100deg,#e9f4ff,#fff0f8);border-radius:18px;padding:.8rem .95rem;font-weight:800;margin-bottom:.95rem}.example{padding:.8rem 1rem;background:#f2f7ff;border-radius:16px;margin-top:.85rem}.article-sheet .guide-list,.article-sheet .addresses,.article-sheet .more{margin-top:1rem}.more{padding-top:.9rem;border-top:1px solid var(--line)}.article-prose a{display:inline-block;font-weight:700}
@media(max-width:730px){.wrap,.story{width:calc(100% - 2rem)}.mast .wrap{min-height:58px}.hero .wrap{display:flex;flex-direction:column;align-items:stretch;min-height:0;padding-top:.7rem;padding-bottom:.6rem}.hero-copy{padding:1rem 0 .25rem}.hero h1{font-size:clamp(3rem,13.4vw,5rem)}.hero p{margin-top:.75rem;font-size:1rem}.actions{margin-top:1rem}.hero-art{max-width:430px;width:100%;align-self:center;margin-top:0}.hero-art img{max-height:310px;object-fit:contain}.journey{padding-block:2.2rem}.section-intro{display:block}.section-intro p{margin-top:.35rem}.steps{grid-template-columns:1fr;gap:.6rem}.steps::before{display:none}.steps li{grid-template-columns:70px minmax(0,1fr);grid-template-rows:auto auto auto;column-gap:.7rem;border-radius:22px}.steps img{grid-row:1/4;width:67px;height:62px;margin:0;align-self:center}.steps h3,.steps p,.steps a{grid-column:2}.steps a{margin-top:.25rem}.address-panel{grid-template-columns:1fr;gap:.9rem;padding-block:1.8rem}.addresses div{padding:.7rem .8rem;grid-template-columns:4.4rem minmax(0,1fr);gap:.45rem}.guide-section{padding-block:2rem}.site-footer .wrap{align-items:flex-start;flex-direction:column;gap:.65rem}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}