.site-header{background:var(--color-bg, #fff);border-bottom:1px solid var(--color-border, #e5e7eb);position:sticky;top:0;z-index:100}.site-header-inner{max-width:var(--layout-max-width, 1200px);margin:0 auto;padding:0 1.5rem;height:64px;display:flex;align-items:center;gap:2rem}.site-brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}.site-logo-img{height:36px;width:auto;display:block}.site-logo-mark{width:32px;height:32px;background:var(--color-primary, #4f46e5);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.site-logo-mark svg{width:16px;height:16px}.site-name{font-size:22px;font-weight:700;color:var(--color-text, #0f172a);letter-spacing:-.3px;white-space:nowrap}.thb-nav-desktop{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;flex:1}.thb-nav-item{position:relative}.site-nav-link{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;font-size:14px;font-weight:500;color:var(--color-muted-text, #64748b);text-decoration:none;white-space:nowrap;border-radius:6px;transition:color .15s,background-color .15s}.site-nav-link:hover{color:var(--color-text, #0f172a);background:#0000000a}.thb-nav-chevron{opacity:.5;transition:transform .2s ease,opacity .15s;flex-shrink:0}.thb-nav-chevron--open,.thb-nav-item:hover .thb-nav-chevron{transform:rotate(180deg);opacity:.8}.thb-nav-dropdown{position:absolute;top:calc(100% + 4px);left:0;z-index:50;min-width:220px;padding:6px;list-style:none;margin:0;background:#fff;border:1px solid var(--color-border, #e5e7eb);border-radius:12px;box-shadow:0 8px 30px #00000014,0 2px 8px #0000000a}.thb-drop-enter{transition:opacity .15s ease,transform .15s ease}.thb-drop-enter-start{opacity:0;transform:translateY(-6px)}.thb-drop-enter-end{opacity:1;transform:translateY(0)}.thb-drop-leave{transition:opacity .1s ease,transform .1s ease}.thb-drop-leave-start{opacity:1;transform:translateY(0)}.thb-drop-leave-end{opacity:0;transform:translateY(-6px)}.thb-nav-dropdown li a{display:block;padding:8px 12px;font-size:14px;font-weight:450;color:var(--color-muted-text, #475569);text-decoration:none;border-radius:8px;transition:background-color .12s,color .12s}.thb-nav-dropdown li a:hover{background:var(--color-section-bg, #f8fafc);color:var(--color-text, #0f172a)}.site-header-right{display:flex;align-items:center;gap:8px;flex-shrink:0;margin-left:auto}.site-header-actions{display:flex;align-items:center;gap:.75rem}.header-cta{display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;background:var(--color-primary, #4f46e5);color:#fff;padding:8px 20px;border-radius:8px;text-decoration:none;white-space:nowrap;border:none;transition:transform .15s,box-shadow .15s,opacity .15s}.header-cta:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #0000001a}.header-cta--secondary{background:transparent;color:var(--color-primary, #4f46e5);border:1.5px solid var(--color-primary, #4f46e5)}.header-cta--secondary:hover{background:var(--color-primary, #4f46e5);color:#fff;opacity:1}.thb-hamburger,.thb-mobile-overlay,.thb-mobile-drawer{display:none}@media(max-width:1023px){.site-header-inner{gap:1rem}.thb-nav-desktop{display:none}.thb-hamburger{display:flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;background:none;border:1px solid transparent;border-radius:8px;cursor:pointer;position:relative;transition:background-color .15s;flex-shrink:0}.thb-hamburger:hover{background:#0000000a}.thb-hamburger-line{position:absolute;width:18px;height:2px;background:var(--color-text, #334155);border-radius:2px;transition:transform .25s cubic-bezier(.4,0,.2,1),opacity .2s}.thb-hamburger-line--1{transform:translateY(-5px)}.thb-hamburger-line--2{transform:translateY(0)}.thb-hamburger-line--3{transform:translateY(5px)}.thb-hamburger--active .thb-hamburger-line--1{transform:translateY(0) rotate(45deg)}.thb-hamburger--active .thb-hamburger-line--2{opacity:0;transform:scaleX(0)}.thb-hamburger--active .thb-hamburger-line--3{transform:translateY(0) rotate(-45deg)}.thb-mobile-overlay{position:fixed;inset:0;z-index:140;background:#0000004d;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}.thb-mobile-drawer{display:flex;flex-direction:column;position:fixed;top:0;right:0;bottom:0;z-index:150;width:min(340px,85vw);background:var(--color-bg, #fff);box-shadow:-8px 0 30px #0000001a;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.thb-drawer-start{opacity:0;transform:translate(100%)}.thb-drawer-end{opacity:1;transform:translate(0)}.thb-mobile-drawer-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--color-border, #e5e7eb);flex-shrink:0}.thb-mobile-drawer-header .site-name{font-size:18px}.thb-mobile-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:none;background:none;color:var(--color-muted-text, #64748b);cursor:pointer;transition:background .15s,color .15s}.thb-mobile-close:hover{background:#0000000d;color:var(--color-text, #0f172a)}.thb-mobile-nav{flex:1;padding:8px 0}.thb-mobile-item{border-bottom:1px solid var(--color-border, #f1f5f9)}.thb-mobile-item:last-child{border-bottom:none}.thb-mobile-item-row{display:flex;align-items:center}.thb-mobile-link{flex:1;display:block;padding:14px 20px;font-size:15px;font-weight:500;color:var(--color-text, #1e293b);text-decoration:none;transition:background .12s}.thb-mobile-link:hover{background:#00000008}.thb-mobile-expand{display:flex;align-items:center;justify-content:center;width:48px;height:48px;background:none;border:none;color:var(--color-muted-text, #64748b);cursor:pointer;transition:color .15s,transform .15s;flex-shrink:0}.thb-mobile-expand:hover{color:var(--color-text, #334155)}.thb-mobile-expand--open svg{transform:rotate(180deg)}.thb-mobile-children{list-style:none;margin:0;padding:0 0 8px;background:var(--color-section-bg, #f8fafc)}.thb-mobile-child-link{display:block;padding:10px 20px 10px 40px;font-size:14px;color:var(--color-muted-text, #475569);text-decoration:none;transition:color .12s,background .12s;position:relative}.thb-mobile-child-link:before{content:"";position:absolute;left:24px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--color-border, #cbd5e1);transform:translateY(-50%)}.thb-mobile-child-link:hover{color:var(--color-text, #0f172a);background:#00000008}.thb-mobile-cta{padding:16px 20px;border-top:1px solid var(--color-border, #e5e7eb);flex-shrink:0}.header-cta--mobile{display:flex;width:100%;justify-content:center;padding:12px 20px;font-size:15px;border-radius:10px}}@media(max-width:639px){.site-header-inner{padding:0 1rem;height:56px}.site-name{font-size:18px}.site-logo-img{height:28px}.site-header-actions .header-cta{padding:6px 14px;font-size:13px}}