/* ===== 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;background:var(--color-bg-dark);color:var(--color-text-white);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;display:flex;flex-direction:column}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{background:none;cursor:pointer;font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--color-accent-gold);outline-offset:2px}

/* ===== CSS Variables ===== */
:root{
  --color-primary-red:#CC2936;
  --color-primary-black:#1A1A1A;
  --color-accent-gold:#D4AF37;
  --color-bg-dark:#0D0D0D;
  --color-bg-light:#F5F5F0;
  --color-surface-card:#2A2A2A;
  --color-text-white:#FFFFFF;
  --color-text-muted:#999999;
  --color-data-green:#27AE60;
  --color-data-red:#E74C3C;
  --font-headings:'Bebas Neue',Impact,'Arial Black',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --font-data:'JetBrains Mono','Courier New',monospace;
  --header-width:80px;
  --nav-width:200px;
  --transition-speed:0.3s;
  --container-max:1280px;
  --gap:2rem
}

/* ===== Typography ===== */
h1,h2,h3,h4{font-family:var(--font-headings);font-weight:700;line-height:1.1;color:var(--color-text-white)}
h1{font-size:clamp(48px,8vw,72px);line-height:1}
h2{font-size:clamp(32px,5vw,48px);line-height:1.1}
h3{font-size:clamp(24px,3.5vw,32px);line-height:1.2}
body,p{font-family:var(--font-body);font-size:16px;line-height:1.6;color:var(--color-text-white)}
.data-text{font-family:var(--font-data);font-size:18px;line-height:1.4;letter-spacing:0.02em}
.text-muted{color:var(--color-text-muted)}
.text-gold{color:var(--color-accent-gold)}
.text-red{color:var(--color-primary-red)}

/* ===== Skip Link ===== */
.skip-link{
  position:absolute;top:-100%;left:0;z-index:10000;
  background:var(--color-accent-gold);color:var(--color-primary-black);
  padding:0.75rem 1.5rem;font-weight:700;font-size:0.875rem;
  transition:top 0.2s
}
.skip-link:focus{top:0}

/* ===== Header ===== */
[data-header]{
  position:fixed;top:0;left:0;z-index:9000;
  width:var(--header-width);height:100vh;
  background:var(--color-bg-dark);
  display:flex;flex-direction:column;align-items:center;
  padding:1.5rem 0.5rem;gap:2rem;
  border-right:1px solid rgba(212,175,55,0.15);
  transition:transform var(--transition-speed) ease
}
.header-brand{
  display:flex;flex-direction:column;align-items:center;gap:1rem;
  width:100%
}
.logo{
  font-family:var(--font-headings);font-size:1.5rem;line-height:1;
  color:var(--color-text-white);letter-spacing:0.05em;
  writing-mode:vertical-rl;text-orientation:mixed;
  padding:0.25rem;transition:color 0.2s
}
.logo:hover{color:var(--color-accent-gold)}
[data-nav-toggle]{
  display:none;width:40px;height:40px;
  align-items:center;justify-content:center;
  color:var(--color-text-white)
}
.nav-toggle-icon,.nav-toggle-icon::before,.nav-toggle-icon::after{
  display:block;width:24px;height:2px;background:var(--color-text-white);
  transition:all 0.3s;position:relative
}
.nav-toggle-icon::before{content:'';position:absolute;top:-7px}
.nav-toggle-icon::after{content:'';position:absolute;top:7px}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-icon{background:transparent}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-icon::before{top:0;transform:rotate(45deg)}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-icon::after{top:0;transform:rotate(-45deg)}

/* ===== Navigation ===== */
[data-nav]{
  display:flex;flex-direction:column;align-items:center;
  gap:1.25rem;width:100%;flex:1
}
.nav-link{
  font-family:var(--font-headings);font-size:0.875rem;line-height:1;
  color:var(--color-text-muted);letter-spacing:0.08em;
  writing-mode:vertical-rl;text-orientation:mixed;
  padding:0.5rem 0.25rem;transition:color 0.2s,transform 0.2s;
  position:relative
}
.nav-link:hover{color:var(--color-accent-gold);transform:scale(1.05)}
.nav-link[aria-current="page"]{
  color:var(--color-accent-gold);
  text-shadow:0 0 8px rgba(212,175,55,0.3)
}
.nav-link[aria-current="page"]::after{
  content:'';position:absolute;right:-4px;top:50%;transform:translateY(-50%);
  width:3px;height:60%;background:var(--color-accent-gold);border-radius:2px
}

/* ===== Main Content Area ===== */
#main-content{
  margin-left:var(--header-width);flex:1;
  background:var(--color-bg-light);min-height:100vh
}

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

/* ===== Button ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-body);font-weight:600;font-size:1rem;
  padding:0.75rem 2rem;border-radius:4px;transition:all 0.25s;
  cursor:pointer;line-height:1.2
}
.btn-primary{background:var(--color-primary-red);color:var(--color-text-white)}
.btn-primary:hover{background:#b02430;transform:translateY(-2px);box-shadow:0 4px 16px rgba(204,41,54,0.35)}
.btn-outline{background:transparent;border:2px solid var(--color-accent-gold);color:var(--color-accent-gold)}
.btn-outline:hover{background:var(--color-accent-gold);color:var(--color-primary-black);transform:translateY(-2px)}
.btn-gold{background:var(--color-accent-gold);color:var(--color-primary-black)}
.btn-gold:hover{background:#c9a334;transform:translateY(-2px);box-shadow:0 4px 16px rgba(212,175,55,0.35)}

/* ===== Breadcrumb ===== */
.breadcrumb{
  display:flex;align-items:center;gap:0.5rem;padding:1rem 0;
  font-size:0.875rem;color:var(--color-text-muted);flex-wrap:wrap
}
.breadcrumb a{color:var(--color-text-muted);transition:color 0.2s}
.breadcrumb a:hover{color:var(--color-primary-red)}
.breadcrumb span{color:var(--color-text-white)}
.breadcrumb .separator{color:var(--color-text-muted);margin:0 0.25rem}

/* ===== Card ===== */
.card{
  background:var(--color-surface-card);border-radius:8px;
  padding:1.5rem;transition:transform 0.25s,box-shadow 0.25s;
  border:1px solid rgba(255,255,255,0.06)
}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(0,0,0,0.4)}
.card-gold{border-color:rgba(212,175,55,0.25)}
.card-red{border-color:rgba(204,41,54,0.25)}

/* ===== Footer ===== */
[data-footer]{
  background:var(--color-bg-dark);color:var(--color-text-white);
  padding:3rem 2rem 2rem;margin-left:var(--header-width);
  border-top:1px solid rgba(212,175,55,0.1)
}
.footer-inner{
  max-width:var(--container-max);margin:0 auto;
  display:grid;grid-template-columns:2fr 1fr 1fr;gap:2.5rem 2rem;
  align-items:start
}
.footer-logo{
  font-family:var(--font-headings);font-size:1.75rem;
  color:var(--color-accent-gold);letter-spacing:0.05em;
  display:block;margin-bottom:0.75rem
}
.footer-trust{
  font-size:0.875rem;line-height:1.7;color:var(--color-text-muted);
  max-width:32rem
}
.footer-links{display:flex;flex-direction:column;gap:0.75rem}
.footer-link{
  font-size:0.9375rem;color:var(--color-text-white);
  transition:color 0.2s;position:relative;padding-left:1rem
}
.footer-link::before{
  content:'›';position:absolute;left:0;color:var(--color-accent-gold);
  font-weight:700
}
.footer-link:hover{color:var(--color-accent-gold)}
.footer-contact{
  display:flex;flex-direction:column;gap:0.5rem;
  font-size:0.875rem;color:var(--color-text-muted)
}
.contact-item{display:block;line-height:1.6}
.contact-note{margin-top:0.5rem;font-style:italic;font-size:0.8rem;color:var(--color-text-muted);opacity:0.8}
.footer-icp{
  grid-column:1/-1;padding-top:1.5rem;margin-top:1rem;
  border-top:1px solid rgba(255,255,255,0.06);
  font-size:0.8rem;color:var(--color-text-muted);text-align:center
}

/* ===== Scroll Progress ===== */
[data-scroll-progress]{
  position:fixed;top:0;left:0;z-index:9999;width:0%;height:3px;
  background:linear-gradient(90deg,var(--color-primary-red),var(--color-accent-gold));
  transition:width 0.1s linear;pointer-events:none
}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .footer-inner{grid-template-columns:1fr 1fr;gap:2rem}
  .footer-contact{grid-column:1/-1}
}
@media(max-width:768px){
  :root{--header-width:0px}
  [data-header]{
    width:100%;height:60px;flex-direction:row;
    padding:0 1rem;border-right:none;border-bottom:1px solid rgba(212,175,55,0.15);
    align-items:center;justify-content:space-between
  }
  .header-brand{flex-direction:row;width:auto;gap:0}
  .logo{writing-mode:horizontal-tb;font-size:1.25rem}
  [data-nav-toggle]{display:flex}
  [data-nav]{
    position:fixed;top:60px;left:0;width:280px;height:calc(100vh - 60px);
    background:var(--color-bg-dark);flex-direction:column;
    padding:2rem 1.5rem;gap:1rem;align-items:flex-start;
    transform:translateX(-100%);transition:transform var(--transition-speed) ease;
    border-right:1px solid rgba(212,175,55,0.15);z-index:8999
  }
  [data-nav][data-open]{transform:translateX(0)}
  .nav-link{writing-mode:horizontal-tb;font-size:1.125rem;padding:0.5rem 0}
  .nav-link[aria-current="page"]::after{right:auto;left:0;top:auto;bottom:0;width:100%;height:3px;transform:none}
  #main-content{margin-left:0}
  [data-footer]{margin-left:0;padding:2rem 1.5rem}
  .footer-inner{grid-template-columns:1fr;gap:1.5rem}
  .footer-icp{text-align:left}
}
@media(max-width:480px){
  .footer-contact .contact-item{font-size:0.8rem}
  .footer-trust{font-size:0.8rem}
}

/* ===== Reduced Motion ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  html{scroll-behavior:auto}
  .card:hover{transform:none}
  .btn:hover{transform:none}
}

/* ===== 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:0}

/* ===== Image Container Base ===== */
.img-container{position:relative;overflow:hidden;background:var(--color-surface-card);border-radius:4px}
.img-container img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.img-container:hover img{transform:scale(1.03)}