/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{min-height:100vh;background:#F5F0EB;color:#2B1D14;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;font-weight:400;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
a{color:#1A365D;text-decoration:none;transition:color 0.25s ease}
a:hover{color:#D94F30}
a:focus-visible{outline:2px solid #D94F30;outline-offset:2px;border-radius:2px}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}
h1,h2,h3,h4,h5,h6{font-family:Georgia,'Times New Roman',serif;font-weight:700;letter-spacing:-0.02em;color:#2B1D14;line-height:1.25}
::selection{background:#D94F30;color:#F5F0EB}

/* ===== CSS Variables ===== */
:root{--color-cream:#F5F0EB;--color-dark-brown:#2B1D14;--color-red-orange:#D94F30;--color-deep-blue:#1A365D;--color-gold:#C9A96E;--color-light-gray:#E8E4DF;--color-white:#FFFFFF;--color-dark-overlay:rgba(43,29,20,0.85);--font-heading:Georgia,'Times New Roman',serif;--font-body:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;--nav-width:260px;--max-content:1200px;--transition-base:0.25s ease;--shadow-card:0 2px 8px rgba(43,29,20,0.06);--shadow-card-hover:0 6px 20px rgba(43,29,20,0.1);--border-thin:1px solid #E8E4DF;--radius-sm:4px;--radius-md:8px}

/* ===== Chinese Typography ===== */
html{font-size:16px}
body{font-size:1rem}
h1{font-size:2.5rem;margin-bottom:1rem}
h2{font-size:2rem;margin-bottom:0.75rem}
h3{font-size:1.5rem;margin-bottom:0.5rem}
h4{font-size:1.25rem;margin-bottom:0.5rem}
p{margin-bottom:1rem}
small,.text-small{font-size:0.875rem;color:#5A4A3A}
.text-caption{font-family:var(--font-body);font-weight:300;font-size:0.875rem;color:#5A4A3A}

/* ===== Skip Link ===== */
.skip-link{position:absolute;top:0;left:0;z-index:1000;padding:0.75rem 1.5rem;background:#D94F30;color:#F5F0EB;font-weight:600;font-size:0.875rem;transform:translateY(-120%);transition:transform 0.2s ease}
.skip-link:focus{transform:translateY(0)}.skip-link:focus-visible{outline:2px solid #C9A96E;outline-offset:2px}

/* ===== Header Bar (Mobile) ===== */
.header-bar{display:flex;align-items:center;justify-content:space-between;padding:0.75rem 1.25rem;background:#2B1D14;position:relative;z-index:200}
.header-bar .header-brand{font-family:var(--font-heading);font-size:1.35rem;font-weight:700;color:#C9A96E;letter-spacing:-0.02em;text-decoration:none}
.header-bar .header-brand:hover{color:#C9A96E;opacity:0.85}

/* ===== Nav Toggle ===== */
.nav-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;gap:5px;padding:8px;background:transparent;border-radius:var(--radius-sm);transition:background 0.2s}
.nav-toggle:hover{background:rgba(255,255,255,0.08)}
.nav-toggle:focus-visible{outline:2px solid #C9A96E;outline-offset:2px}
.nav-toggle-line{display:block;width:24px;height:2px;background:#F5F0EB;border-radius:1px;transition:transform 0.3s ease,opacity 0.3s ease;transform-origin:center}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Site Nav (Desktop Sidebar / Mobile Drawer) ===== */
.site-nav{background:#2B1D14;color:#F5F0EB;display:flex;flex-direction:column;position:fixed;top:0;left:0;width:var(--nav-width);height:100vh;z-index:300;transform:translateX(-100%);transition:transform 0.35s cubic-bezier(0.22,1,0.36,1);overflow-y:auto}
.site-nav[data-open]{transform:translateX(0)}
.site-nav .nav-header{padding:2rem 1.5rem 1.5rem;border-bottom:1px solid rgba(245,240,235,0.1)}
.site-nav .nav-brand{font-family:var(--font-heading);font-size:1.6rem;font-weight:700;color:#C9A96E;letter-spacing:-0.02em;display:block;text-decoration:none}
.site-nav .nav-brand:hover{color:#C9A96E;opacity:0.85}
.site-nav .nav-tagline{display:block;font-size:0.75rem;color:rgba(201,169,110,0.7);margin-top:0.25rem;font-weight:300;letter-spacing:0.04em;text-transform:uppercase}
.site-nav .nav-list{padding:1.25rem 0;flex:1}
.site-nav .nav-list li{border-left:3px solid transparent;transition:border-color 0.25s ease}
.site-nav .nav-list li:has(a[aria-current="page"]){border-left-color:#D94F30}
.site-nav .nav-list a{display:block;padding:0.7rem 1.5rem;color:#F5F0EB;font-size:0.95rem;font-weight:400;letter-spacing:0.02em;transition:color 0.25s ease,background 0.25s ease;text-decoration:none}
.site-nav .nav-list a:hover{color:#D94F30;background:rgba(217,79,48,0.06)}
.site-nav .nav-list a[aria-current="page"]{color:#D94F30;font-weight:600}
.site-nav .nav-footer{padding:1.5rem;border-top:1px solid rgba(245,240,235,0.1);display:flex;flex-direction:column;gap:0.75rem}
.site-nav .nav-status{font-size:0.7rem;color:rgba(245,240,235,0.5);letter-spacing:0.06em;text-transform:uppercase;font-weight:300}
.site-nav .nav-cta{font-size:0.8rem;padding:0.5rem 1rem;text-align:center}

/* ===== Nav Overlay (Mobile) ===== */
body.nav-open::after{content:'';position:fixed;top:0;left:0;width:100%;height:100%;background:var(--color-dark-overlay);z-index:250;opacity:1;transition:opacity 0.35s ease;pointer-events:auto}
body:not(.nav-open)::after{opacity:0;pointer-events:none}

/* ===== Main Content ===== */
.main-content{min-height:80vh;padding:1.5rem 1.25rem 3rem;background:#F5F0EB;position:relative;z-index:1}
.main-content .container{max-width:var(--max-content);margin:0 auto;padding:0}

/* ===== Site Footer ===== */
.site-footer{background:#2B1D14;color:#F5F0EB;padding:3rem 1.25rem 1.5rem;position:relative;z-index:1}
.footer-inner{max-width:var(--max-content);margin:0 auto;display:grid;grid-template-columns:1fr;gap:2.5rem}
.footer-logo{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:#C9A96E;letter-spacing:-0.02em;margin-bottom:0.75rem}
.footer-tagline{font-size:0.85rem;line-height:1.7;color:rgba(245,240,235,0.7);max-width:480px;font-weight:300}
.footer-heading{font-family:var(--font-body);font-size:0.8rem;font-weight:600;color:#C9A96E;letter-spacing:0.06em;text-transform:uppercase;margin-bottom:1rem;padding-bottom:0.5rem;border-bottom:1px solid rgba(201,169,110,0.25)}
.footer-nav ul,.footer-contact ul{display:flex;flex-direction:column;gap:0.5rem}
.footer-nav a,.footer-contact a{color:rgba(245,240,235,0.8);font-size:0.9rem;transition:color 0.25s ease;text-decoration:none}
.footer-nav a:hover,.footer-contact a:hover{color:#D94F30}
.footer-contact li{color:rgba(245,240,235,0.7);font-size:0.9rem;line-height:1.5}
.footer-note{font-size:0.75rem;color:rgba(245,240,235,0.45);margin-top:0.75rem;font-style:italic}
.footer-legal{grid-column:1 / -1;padding-top:1.5rem;border-top:1px solid rgba(245,240,235,0.1);display:flex;flex-direction:column;gap:0.35rem;font-size:0.7rem;color:rgba(245,240,235,0.4)}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:0.6rem 1.4rem;font-family:var(--font-body);font-size:0.9rem;font-weight:500;border-radius:var(--radius-sm);border:1px solid transparent;text-decoration:none;transition:background 0.25s ease,color 0.25s ease,border-color 0.25s ease,box-shadow 0.25s ease;cursor:pointer;line-height:1.4}
.btn:focus-visible{outline:2px solid #D94F30;outline-offset:2px}
.btn-primary{background:#D94F30;color:#F5F0EB;border-color:#D94F30}
.btn-primary:hover{background:#c04428;color:#F5F0EB;border-color:#c04428;box-shadow:0 2px 12px rgba(217,79,48,0.25)}
.btn-secondary{background:transparent;color:#1A365D;border-color:#1A365D}
.btn-secondary:hover{background:#1A365D;color:#F5F0EB;border-color:#1A365D}

/* ===== Breadcrumb ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:0.4rem;padding:0.75rem 0;font-size:0.8rem;color:#5A4A3A;font-weight:300}
.breadcrumb a{color:#1A365D;text-decoration:none}
.breadcrumb a:hover{color:#D94F30}
.breadcrumb .breadcrumb-sep{color:#C9A96E;font-weight:300;margin:0 0.15rem}
.breadcrumb .breadcrumb-current{color:#2B1D14;font-weight:500}

/* ===== Container ===== */
.container{max-width:var(--max-content);margin:0 auto;padding:0 1.25rem;width:100%}

/* ===== Grid ===== */
.grid{display:grid;gap:2rem;grid-template-columns:1fr}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== Card ===== */
.card{background:#FFFFFF;border:var(--border-thin);border-radius:var(--radius-md);padding:1.5rem;box-shadow:var(--shadow-card);transition:transform 0.3s ease,box-shadow 0.3s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}

/* ===== Scroll Progress ===== */
.scroll-progress{position:fixed;top:0;left:0;width:0%;height:3px;background:linear-gradient(90deg,#D94F30,#C9A96E);z-index:999;transition:width 0.08s linear;pointer-events:none}
@media(prefers-reduced-motion:reduce){.scroll-progress{transition:none}}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:#2B1D14;color:#F5F0EB;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 2px 12px rgba(43,29,20,0.2);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity 0.35s ease,visibility 0.35s ease,transform 0.35s ease,background 0.25s ease;z-index:500;border:1px solid rgba(245,240,235,0.15)}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:#D94F30;color:#F5F0EB;border-color:#D94F30}
.back-to-top:focus-visible{outline:2px solid #C9A96E;outline-offset:2px}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none;opacity:1;visibility:visible;transform:none}}

/* ===== Responsive Desktop ===== */
@media(min-width:1024px){
  .header-bar{display:none}
  .site-nav{transform:translateX(0);position:fixed;top:0;left:0;width:var(--nav-width);height:100vh;box-shadow:2px 0 20px rgba(43,29,20,0.12)}
  .site-nav .nav-header{padding:2.5rem 1.75rem 1.5rem}
  .site-nav .nav-list a{padding:0.75rem 1.75rem;font-size:1rem}
  .site-nav .nav-footer{padding:1.75rem}
  body.nav-open::after{display:none}
  .main-content{margin-left:var(--nav-width);padding:2.5rem 2.5rem 4rem}
  .site-footer{margin-left:var(--nav-width)}
  .footer-inner{grid-template-columns:2fr 1fr 1.5fr;gap:3rem}
  .footer-legal{grid-column:1 / -1;flex-direction:row;justify-content:space-between}
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
}

/* ===== Responsive Tablet ===== */
@media(min-width:768px)and(max-width:1023px){
  .header-bar{display:flex}
  .site-nav{width:300px}
  .site-nav .nav-header{padding:2rem 1.5rem 1.25rem}
  .site-nav .nav-list a{padding:0.7rem 1.5rem;font-size:1rem}
  .main-content{padding:1.75rem 1.5rem 3rem}
  .footer-inner{grid-template-columns:1fr 1fr;gap:2rem}
  .footer-legal{grid-column:1 / -1;flex-direction:row;justify-content:space-between}
  .grid-2,.grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}

/* ===== Responsive Mobile ===== */
@media(max-width:767px){
  .header-bar{display:flex}
  .site-nav{width:85vw;max-width:320px}
  .site-nav .nav-header{padding:1.5rem 1.25rem 1rem}
  .site-nav .nav-list a{padding:0.6rem 1.25rem;font-size:0.95rem}
  .site-nav .nav-footer{padding:1.25rem}
  .main-content{padding:1.25rem 1rem 2.5rem}
  .footer-inner{grid-template-columns:1fr;gap:2rem}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .back-to-top{bottom:1.25rem;right:1.25rem;width:40px;height:40px;font-size:1rem}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  h1{font-size:2rem}
  h2{font-size:1.6rem}
  h3{font-size:1.25rem}
}

/* ===== Reduced Motion ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms!important;animation-duration:0.01ms!important;scroll-behavior:auto!important}
  .card:hover{transform:none}
  .nav-toggle-line{transition:none}
  .site-nav{transition:none}
  .back-to-top{transition:none}
}