/* Header */
        .site-header {
            position: fixed;
            inset: 0 0 auto;
            z-index: 100;
            height: 82px;
            color: #fff;
            border-bottom: 1px solid rgba(255, 255, 255, .13);
            transition: height .3s, color .3s, background .3s, box-shadow .3s;
        }
        .site-header.scrolled {
            height: 72px;
            color: var(--ink);
            background: rgba(255, 255, 255, .92);
            border-color: rgba(17, 29, 42, .08);
            box-shadow: 0 10px 36px rgba(17, 29, 42, .08);
            backdrop-filter: blur(18px);
        }
        .header-inner {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }
        .logo {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            width: 110px;
            height: 38px;
        }
        .logo img {
            position: absolute;
            width: 100%;
            max-height: 38px;
            object-fit: contain;
            object-position: left center;
            transition: opacity .3s;
        }
        .logo-dark { opacity: 0; }
        .site-header.scrolled .logo-dark { opacity: 1; }
        .site-header.scrolled .logo-light { opacity: 0; }
        .nav { position: absolute; left: 50%; display: flex; align-items: center; gap: 34px; transform: translateX(-50%); }
        .nav a {
            position: relative;
            padding: 28px 0;
            font-size: .92rem;
            font-weight: 600;
        }
        .nav a::after {
            content: "";
            position: absolute;
            left: 0;
            right: 100%;
            bottom: 20px;
            height: 2px;
            background: var(--amber);
            transition: right .25s;
        }
        .nav a:hover::after, .nav a.active::after { right: 0; }
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            padding: 0;
            border: 0;
            color: inherit;
            background: transparent;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            margin: 6px auto;
            background: currentColor;
            transition: transform .25s, opacity .25s;
        }
        .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(8px) rotate(45deg); }
        .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
        .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-8px) rotate(-45deg); }
		

		
        .dt-up {
            position: fixed;
            z-index: 80;
            right: 22px;
            bottom: 22px;
            display: grid;
            place-items: center;
            width: 48px;
            height: 48px;
            border: 0;
            border-radius: 50%;
            color: var(--ink);
            background: var(--amber);
            box-shadow: 0 10px 30px rgba(8,17,26,.2);
            cursor: pointer;
            opacity: 0;
            transform: translateY(15px);
            pointer-events: none;
            transition: opacity .3s, transform .3s;
        }
        .dt-up.visible { opacity: 1; transform: none; pointer-events: auto; }
        .dt-up svg { width: 19px; }