:root{--paper:#fff;--mist:#f5f7fa;--wash:#f8f9fa;--ink:#1c1e23;--copy:#4a4d55;--quiet:#646b76;--line:#d9dee7;--blue:#b33b19;--blue-strong:#842a12;--navy:#2b1712;--dark:#241d1b;--good:#147a52;--danger:#b4233d;--s1:8px;--s2:12px;--s3:16px;--s4:24px;--s5:32px;--s6:48px;--s7:72px;--s8:104px;--radius-sm:5px;--radius:12px;--radius-lg:16px;--shadow:0 18px 55px rgba(43,23,18,.11);--font:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;--h2:clamp(34px,4.4vw,52px);--h3:clamp(20px,2vw,26px)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:132px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}body,button,input{font-family:var(--font)}a{color:inherit;text-decoration:none}button,input{font-size:inherit}button{cursor:pointer}img,svg{display:block;max-width:100%}[hidden]{display:none!important}.skip-link{position:fixed;left:16px;top:-60px;z-index:100;background:var(--navy);color:#fff;padding:10px 14px}.skip-link:focus{top:12px}.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}.utility-bar{border-bottom:1px solid #e8ebf0;background:#fff;color:var(--copy);font-size:13px}.utility-inner{min-height:35px;display:flex;align-items:center;justify-content:space-between;gap:16px}.utility-inner p{margin:0}.utility-link{font-weight:600;color:var(--blue-strong)}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid #e6e9ef}.nav-shell{min-height:76px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;font-size:14px;font-weight:700;letter-spacing:-.4px}.brand img{width:38px;height:38px}.main-nav{display:flex;align-items:center;gap:6px;margin-left:14px}.main-nav a{padding:9px 11px;border-radius:6px;font-size:14px;font-weight:600;white-space:nowrap;color:#353840}.main-nav a:hover{background:var(--mist);color:var(--ink)}.main-nav a[aria-current]{background:#edf5ff;color:var(--blue-strong)}.nav-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.nav-actions>.button{font-size:14px}.lang-dropdown{position:relative}.lang-trigger{min-height:42px;display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);padding:0 15px;font-size:14px;font-weight:600}.chevron{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);margin-left:2px}.lang-menu{position:absolute;right:0;top:calc(100% + 10px);z-index:30;width:190px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.lang-menu a{display:flex;align-items:center;justify-content:space-between;padding:9px 11px;border-radius:7px;font-size:14px}.lang-menu a:hover{background:var(--mist)}.lang-menu a[aria-current]{font-weight:700;color:var(--blue-strong)}.lang-menu a[aria-current]::after{content:"";width:8px;height:4px;border-left:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg)}.button{min-height:46px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--radius-sm);padding:10px 18px;font-weight:650;line-height:1.2;white-space:nowrap;transition:background .18s,color .18s,border-color .18s,transform .18s}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--blue-strong);color:#fff;border-color:var(--blue-strong)}.button-primary:hover{background:var(--navy);color:#fff;border-color:var(--navy)}.button-outline{background:#fff;color:var(--blue-strong);border-color:var(--blue-strong)}.button-outline:hover{background:#edf5ff;color:#064ca8;border-color:#064ca8}.button-quiet{background:var(--mist);color:var(--ink);border-color:var(--line)}.button-quiet:hover{background:#e9edf3;color:var(--ink);border-color:#c5ccd7}.button-small{min-height:38px;padding:7px 12px;font-size:14px}.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0;place-items:center}.burger-lines,.burger-lines::before,.burger-lines::after{display:block;width:20px;height:2px;background:var(--ink);content:"";transition:.2s}.burger-lines{position:relative}.burger-lines::before{position:absolute;top:-6px}.burger-lines::after{position:absolute;top:6px}.mobile-drawer{position:fixed;z-index:50;left:16px;right:16px;top:120px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.mobile-drawer nav{display:grid;gap:4px}.mobile-drawer nav a{padding:12px;border-radius:8px;font-weight:600}.mobile-drawer nav a:hover,.mobile-drawer nav a[aria-current]{background:var(--mist);color:var(--blue-strong)}.mobile-drawer .drawer-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}.eyebrow,.notice-pill{display:flex;width:max-content;min-width:0;max-width:calc(100vw - 40px);align-items:center;gap:8px;border-radius:999px;font-size:13px;font-weight:700}.eyebrow{color:var(--blue-strong);background:#fff1e6;padding:6px 10px}.notice-pill{margin-inline:auto;color:var(--copy);background:#f0f2f5;padding:7px 13px}.notice-dot{width:7px;height:7px;border-radius:50%;background:var(--blue)}h1,h2,h3,p{overflow-wrap:break-word}h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.03em;line-height:1.08}h1{font-size:clamp(44px,6vw,64px);line-height:1;letter-spacing:-1.28px}section>div>h2,.section-heading h2{font-size:var(--h2)}h3{font-size:var(--h3)}.modal h2,.dialog h2{font-size:clamp(20px,3vw,24px);letter-spacing:-.01em}.prose h2{font-size:clamp(26px,3vw,34px)}.prose h3{font-size:clamp(20px,2.3vw,25px)}.lead{font-size:clamp(18px,2vw,21px);line-height:1.6;color:var(--copy)}.muted{color:var(--quiet)}.section{padding:var(--s8) 0}.section-heading{max-width:800px}.section-heading .eyebrow+h2{margin-top:14px}.section-heading p{margin:20px 0 0;color:var(--copy);font-size:18px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg)}.toast{;right:20px;bottom:20px;z-index:80;width:max-content;max-width:min(430px,calc(100% - 32px));padding:12px 16px;border-radius:12px;background:var(--navy);color:#fff;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}.toast.show{opacity:1;transform:none}.site-footer{background:var(--navy);color:#fff;padding:64px 0 28px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:42px}.footer-brand p,.footer-col p{color:#c8d0e3}.footer-brand .brand{margin-bottom:14px}.footer-col h2{font-size:14px;letter-spacing:.02em}.footer-col ul{list-style:none;padding:0;margin:14px 0 0}.footer-col li+li{margin-top:8px}.footer-col a{color:#dfe5f1;font-size:14px}.footer-col a:hover{color:#fff;text-decoration:underline}.footer-base{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:48px;padding-top:22px;border-top:1px solid #33405f;color:#aeb9cf;font-size:13px}.footer-langs{display:flex;flex-wrap:wrap;gap:14px}.footer-langs a[aria-current]{color:#fff;font-weight:700}
@media(max-width:940px){.main-nav,.nav-actions>.login-link,.nav-actions>.create-link{display:none}.nav-toggle{display:grid}.footer-grid{grid-template-columns:1fr 1fr}.utility-inner{min-height:40px}.mobile-drawer{top:120px}}
@media(max-width:640px){.wrap{width:min(100% - 28px,1180px)}.utility-inner p{font-size:12px}.utility-link{display:none}.nav-shell{min-height:68px}.brand span{font-size:15px}.brand img{width:34px;height:34px}.lang-trigger{width:42px;padding:0;font-size:0;gap:0}.lang-trigger .chevron{margin:0}.section{padding:72px 0}.footer-grid{grid-template-columns:minmax(0,1fr)}.footer-base{align-items:flex-start;flex-direction:column}.mobile-drawer{top:112px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}