/* ===== RESET ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border:0;font:inherit;vertical-align:baseline}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{min-height:100vh;line-height:1.6;font-family:'Inter',-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;background:var(--bg-white);color:var(--text-black);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,picture,video,canvas,svg{display:block;max-width:100%}
input,button,textarea,select{font:inherit}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--primary-blue);outline-offset:2px;border-radius:2px}
/* ===== CSS VARIABLES ===== */
:root{--primary-blue:#0066FF;--primary-blue-dark:#004CBF;--accent-orange:#FF6B35;--accent-orange-light:#FF8C5A;--bg-white:#FFFFFF;--bg-light:#F5F7FA;--text-black:#1A1A2E;--text-gray:#4A4A5A;--border-gray:#D0D5DD;--success-green:#22C55E;--font-family:'Inter',sans-serif;--h1:3.5rem;--h2:2.5rem;--h3:1.75rem;--body:1rem;--small:0.875rem;--weight-light:300;--weight-regular:400;--weight-bold:700;--weight-black:900;--max-width:1200px;--header-top-h:60px;--nav-h:48px;--scroll-h:3px;--gap-sm:8px;--gap-md:16px;--gap-lg:24px;--gap-xl:40px;--radius-sm:4px;--radius-md:8px;--radius-lg:16px;--shadow-sm:0 1px 3px rgba(0,0,0,.06);--shadow-md:0 4px 12px rgba(0,0,0,.08);--transition-fast: .2s ease;--transition-smooth: .35s cubic-bezier(.4,0,.2,1)}
/* ===== TYPOGRAPHY ===== */
h1{font-size:var(--h1);font-weight:var(--weight-light);line-height:1.1;letter-spacing:-.02em;color:var(--text-black)}
h2{font-size:var(--h2);font-weight:var(--weight-bold);line-height:1.2;letter-spacing:-.01em;color:var(--text-black)}
h3{font-size:var(--h3);font-weight:var(--weight-bold);line-height:1.3;color:var(--text-black)}
body,.body{font-size:var(--body);font-weight:var(--weight-regular);line-height:1.6;color:var(--text-gray)}
small,.small{font-size:var(--small);font-weight:var(--weight-regular);line-height:1.5;color:var(--text-gray)}
/* ===== SKIP LINK ===== */
.skip-link{position:fixed;top:-100%;left:var(--gap-md);z-index:10000;padding:var(--gap-sm) var(--gap-md);background:var(--primary-blue);color:#fff;font-size:var(--small);font-weight:var(--weight-bold);border-radius:0 0 var(--radius-sm) var(--radius-sm);transition:top var(--transition-fast)}
.skip-link:focus{top:0}
/* ===== SCROLL PROGRESS ===== */
.scroll-progress{position:absolute;bottom:0;left:0;height:var(--scroll-h);width:0%;background:linear-gradient(90deg,var(--primary-blue),var(--accent-orange-light));z-index:10;border-radius:0 2px 2px 0;pointer-events:none;transition:width .05s linear}
/* ===== HEADER ===== */
.site-header{position:relative;z-index:1000;background:var(--bg-white);border-bottom:1px solid var(--border-gray);box-shadow:var(--shadow-sm)}
.header-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;max-width:var(--max-width);margin:0 auto;padding:0 var(--gap-lg);min-height:var(--header-top-h);gap:var(--gap-sm)}
.header-brand{display:flex;flex-wrap:wrap;align-items:baseline;gap:var(--gap-sm) var(--gap-md);flex:1 1 auto}
.header-logo{font-size:1.625rem;font-weight:var(--weight-black);color:var(--text-black);letter-spacing:-.03em;line-height:1.2;transition:color var(--transition-fast)}
.header-logo:hover{color:var(--primary-blue)}
.header-tagline{font-size:var(--small);font-weight:var(--weight-regular);color:var(--text-gray);letter-spacing:.02em;white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:var(--gap-md);flex:0 0 auto}
.header-search{display:flex;align-items:center;gap:var(--gap-sm);background:var(--bg-light);border:1px solid var(--border-gray);border-radius:var(--radius-md);padding:0 var(--gap-sm);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);min-width:180px}
.header-search:focus-within{border-color:var(--primary-blue);box-shadow:0 0 0 3px rgba(0,102,255,.15)}
.search-input{flex:1;min-width:100px;padding:var(--gap-sm) var(--gap-sm);background:transparent;border:none;outline:none;font-size:var(--small);color:var(--text-black)}
.search-input::placeholder{color:var(--text-gray);opacity:.6}
.search-icon{font-size:.75rem;color:var(--text-gray);padding:0 var(--gap-sm);cursor:default;opacity:.5;transition:opacity var(--transition-fast)}
.header-search:focus-within .search-icon{color:var(--primary-blue);opacity:1}
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:36px;height:36px;background:transparent;border:none;cursor:pointer;gap:4px;padding:4px;border-radius:var(--radius-sm);transition:background var(--transition-fast)}
.nav-toggle:hover{background:var(--bg-light)}
.nav-toggle .bar{display:block;width:22px;height:2px;background:var(--text-black);border-radius:2px;transition:transform var(--transition-smooth),opacity var(--transition-smooth)}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
/* ===== NAVIGATION ===== */
.header-nav{max-width:var(--max-width);margin:0 auto;padding:0 var(--gap-lg);border-top:1px solid var(--border-gray);transition:max-height var(--transition-smooth),opacity var(--transition-smooth),padding var(--transition-smooth);overflow:hidden}
.header-nav ul{display:flex;flex-wrap:wrap;gap:0;min-height:var(--nav-h);align-items:center}
.header-nav li{display:flex}
.header-nav a{position:relative;display:flex;align-items:center;padding:0 var(--gap-md);height:var(--nav-h);font-size:var(--small);font-weight:var(--weight-regular);color:var(--text-gray);letter-spacing:.01em;transition:color var(--transition-fast),background var(--transition-fast);white-space:nowrap}
.header-nav a::after{content:'';position:absolute;bottom:0;left:var(--gap-md);right:var(--gap-md);height:2px;background:var(--primary-blue);transform:scaleX(0);transform-origin:left;transition:transform var(--transition-smooth)}
.header-nav a:hover{color:var(--primary-blue);background:rgba(0,102,255,.04)}
.header-nav a:hover::after{transform:scaleX(1)}
.header-nav a[aria-current="page"]{color:var(--primary-blue);font-weight:var(--weight-bold)}
.header-nav a[aria-current="page"]::after{transform:scaleX(1);background:var(--primary-blue)}
/* ===== FOOTER ===== */
.site-footer{background:var(--text-black);color:rgba(255,255,255,.85);border-top:3px solid var(--primary-blue);margin-top:auto}
.footer-inner{max-width:var(--max-width);margin:0 auto;padding:var(--gap-xl) var(--gap-lg);display:flex;flex-wrap:wrap;gap:var(--gap-xl);justify-content:space-between}
.footer-brand{flex:2 1 300px;min-width:220px}
.footer-logo{display:inline-block;font-size:1.5rem;font-weight:var(--weight-black);color:#fff;letter-spacing:-.02em;margin-bottom:var(--gap-sm);transition:color var(--transition-fast)}
.footer-logo:hover{color:var(--primary-blue)}
.footer-desc{font-size:var(--small);line-height:1.7;color:rgba(255,255,255,.6);max-width:400px}
.footer-links{flex:1 1 180px;display:flex;flex-direction:column;gap:var(--gap-sm)}
.footer-links a{font-size:var(--small);color:rgba(255,255,255,.7);padding:var(--gap-sm) 0;transition:color var(--transition-fast),padding-left var(--transition-fast);border-bottom:1px solid rgba(255,255,255,.08)}
.footer-links a:hover{color:var(--primary-blue);padding-left:4px}
.footer-contact{flex:1 1 240px;display:flex;flex-direction:column;gap:var(--gap-sm)}
.contact-item{font-size:var(--small);color:rgba(255,255,255,.6);line-height:1.6;display:flex;align-items:center;gap:var(--gap-sm)}
.contact-item::before{content:'·';color:var(--primary-blue);font-weight:var(--weight-bold);font-size:1.2rem}
.footer-bottom{width:100%;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding-top:var(--gap-md);border-top:1px solid rgba(255,255,255,.1);font-size:var(--small);color:rgba(255,255,255,.45);gap:var(--gap-sm)}
.footer-bottom .icp{letter-spacing:.02em}
/* ===== COMMON COMPONENTS ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--gap-lg);width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-size:var(--small);font-weight:var(--weight-bold);border:none;border-radius:var(--radius-md);cursor:pointer;background:var(--primary-blue);color:#fff;transition:background var(--transition-fast),transform var(--transition-fast),box-shadow var(--transition-fast);text-align:center;gap:var(--gap-sm);line-height:1.4}
.btn:hover{background:var(--primary-blue-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--primary-blue);border:2px solid var(--primary-blue)}
.btn-outline:hover{background:var(--primary-blue);color:#fff}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:var(--gap-sm);padding:var(--gap-md) 0;font-size:var(--small);color:var(--text-gray)}
.breadcrumb a{color:var(--text-gray);transition:color var(--transition-fast)}
.breadcrumb a:hover{color:var(--primary-blue)}
.breadcrumb span.sep{margin:0 var(--gap-sm);color:var(--border-gray);user-select:none}
.breadcrumb [aria-current="page"]{color:var(--text-black);font-weight:var(--weight-bold)}
/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  :root{--h1:2.4rem;--h2:1.8rem;--h3:1.35rem;--header-top-h:52px}
  .header-top{padding:0 var(--gap-md);gap:var(--gap-sm)}
  .header-logo{font-size:1.35rem}
  .header-tagline{font-size:.75rem;white-space:normal}
  .header-actions{gap:var(--gap-sm)}
  .header-search{min-width:140px;flex:1 1 100%;order:3;margin-top:var(--gap-sm)}
  .header-search input{min-width:80px}
  .nav-toggle{display:flex}
  .header-nav{max-height:0;opacity:0;padding:0 var(--gap-md);border-top:none;visibility:hidden;pointer-events:none}
  .header-nav[data-open]{max-height:480px;opacity:1;padding:var(--gap-sm) var(--gap-md) var(--gap-md);visibility:visible;pointer-events:auto;border-top:1px solid var(--border-gray)}
  .header-nav ul{flex-direction:column;align-items:stretch;min-height:auto}
  .header-nav a{height:44px;padding:0 var(--gap-md);font-size:.9rem;border-radius:var(--radius-sm)}
  .header-nav a::after{display:none}
  .header-nav a[aria-current="page"]{background:rgba(0,102,255,.08);border-radius:var(--radius-sm)}
  .footer-inner{flex-direction:column;gap:var(--gap-lg);padding:var(--gap-lg) var(--gap-md)}
  .footer-brand{flex:1 1 auto}
  .footer-links{flex-direction:row;flex-wrap:wrap;gap:var(--gap-sm)}
  .footer-links a{border-bottom:none;padding:var(--gap-sm) var(--gap-sm) var(--gap-sm) 0}
  .footer-contact{gap:var(--gap-sm)}
  .footer-bottom{flex-direction:column;text-align:center;gap:var(--gap-sm)}
}
@media(min-width:769px)and(max-width:1024px){
  .header-top{padding:0 var(--gap-md)}
  .header-nav{padding:0 var(--gap-md)}
  .header-search{min-width:160px}
  .footer-inner{gap:var(--gap-lg)}
}
@media(min-width:1025px){
  .header-nav{max-height:var(--nav-h);opacity:1;visibility:visible;pointer-events:auto}
  .header-search{min-width:220px}
}
/* ===== ACCESSIBILITY & MOTION ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .scroll-progress{transition:none!important}
  .nav-toggle .bar{transition:none!important}
  .header-nav{transition:none!important}
  .header-nav a::after{transition:none!important}
}
@media(prefers-color-scheme:dark){
  .site-header{background:var(--bg-white)} 
  .footer-bottom .copyright,
  .footer-bottom .icp{color:rgba(255,255,255,.5)}
}
/* ===== IMAGE CONTAINER BASE ===== */
.img-frame{position:relative;overflow:hidden;background:var(--bg-light);border-radius:var(--radius-lg);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;color:var(--text-gray);font-size:var(--small)}
.img-frame img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-smooth)}
.img-frame:hover img{transform:scale(1.03)}
.img-frame .placeholder{opacity:.4;font-weight:var(--weight-light);letter-spacing:.04em}
/* ===== UTILITY ===== */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}