/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{min-height:100vh;background-color:#1A1A1A;color:#FFFFFF;font-family:Inter,'Noto Sans SC',sans-serif;font-size:16px;line-height:1.6;font-weight:400;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{cursor:pointer;font:inherit;color:inherit;border:none;background:none}
:focus-visible{outline:2px solid #C9A96E;outline-offset:2px;border-radius:2px}

/* ===== Variables ===== */
:root{--color-primary:#B22222;--color-primary-dark:#8B0000;--color-bg:#1A1A1A;--color-gold:#C9A96E;--color-gold-light:#D4AF37;--color-white:#FFFFFF;--color-light:#F5F5F5;--color-gray:#888888;--color-border:rgba(255,255,255,0.08);--font-heading:Inter,'Noto Sans SC',sans-serif;--font-body:Inter,'Noto Sans SC',sans-serif;--h1-size:clamp(2.4rem,6vw,3.5rem);--h1-line:1.1;--h2-size:clamp(1.8rem,4vw,2.5rem);--h2-line:1.2;--h3-size:clamp(1.4rem,3vw,1.75rem);--h3-line:1.3;--body-size:1rem;--body-line:1.6;--small-size:0.8125rem;--small-line:1.5;--container-max:1280px;--container-pad:24px;--header-h:auto;--transition:0.3s cubic-bezier(0.25,0.1,0.25,1);--shadow-card:0 4px 20px rgba(0,0,0,0.3);--shadow-hover:0 8px 32px rgba(0,0,0,0.4);--radius-sm:4px;--radius-md:8px}

/* ===== Typography ===== */
h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:800;line-height:var(--h1-line);color:var(--color-white)}
h1{font-size:var(--h1-size);font-weight:800}
h2{font-size:var(--h2-size);font-weight:700;line-height:var(--h2-line)}
h3{font-size:var(--h3-size);font-weight:600;line-height:var(--h3-line)}
p,li{font-size:var(--body-size);line-height:var(--body-line)}
small,.small{font-size:var(--small-size);line-height:var(--small-line)}

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

/* ===== Skip Link ===== */
.skip-link{position:absolute;top:-100px;left:16px;z-index:10000;padding:12px 24px;background:var(--color-gold);color:#1A1A1A;font-weight:600;border-radius:var(--radius-sm);transition:top 0.3s}
.skip-link:focus{top:16px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(26,26,26,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);padding:0 var(--container-pad)}
.header__inner{display:flex;align-items:baseline;justify-content:center;flex-wrap:wrap;gap:12px 24px;max-width:var(--container-max);margin:0 auto;padding:16px 0 8px 0;position:relative}
.header__brand{display:flex;align-items:baseline;gap:16px}
.brand__name{font-family:var(--font-heading);font-size:clamp(1.6rem,4vw,2.6rem);font-weight:800;color:var(--color-primary);letter-spacing:-0.02em;line-height:1;white-space:nowrap}
.brand__name:hover{color:var(--color-gold-light);transition:color var(--transition)}
.brand__tagline{font-size:clamp(0.7rem,1.4vw,0.9rem);font-weight:400;color:var(--color-gold);letter-spacing:0.08em;white-space:nowrap;opacity:0.9;padding-top:0.3em}
.nav__toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;gap:5px;background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:8px;position:absolute;right:0;top:50%;transform:translateY(-50%)}
.nav__toggle-icon{display:block;width:20px;height:2px;background:var(--color-white);border-radius:1px;transition:transform var(--transition),opacity var(--transition)}
.nav__toggle[aria-expanded="true"] .nav__toggle-icon:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] .nav__toggle-icon:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] .nav__toggle-icon:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.header__nav-wrap{max-width:var(--container-max);margin:0 auto;padding:0 0 8px 0}
.header__nav{display:flex;justify-content:center}
.nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 0}
.nav__item{position:relative}
.nav__link{display:block;padding:8px 20px;font-size:0.9375rem;font-weight:500;color:rgba(255,255,255,0.75);letter-spacing:0.04em;transition:color var(--transition),background var(--transition);border-radius:var(--radius-sm);white-space:nowrap}
.nav__link:hover,.nav__link:focus-visible{color:var(--color-gold);background:rgba(201,169,110,0.08)}
.nav__link[aria-current="page"]{color:var(--color-gold);box-shadow:inset 0 -2px 0 var(--color-gold)}

/* ===== Footer ===== */
.site-footer{background:var(--color-bg);border-top:1px solid var(--color-border);padding:48px var(--container-pad) 80px var(--container-pad);margin-top:0}
.footer__inner{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:40px;max-width:var(--container-max);margin:0 auto}
.footer__col{display:flex;flex-direction:column;gap:12px}
.footer__brand{font-family:var(--font-heading);font-size:1.4rem;font-weight:700;color:var(--color-primary);letter-spacing:-0.01em}
.footer__tagline{font-size:0.875rem;color:var(--color-gray);line-height:1.5;max-width:28em}
.footer__icp{font-size:0.75rem;color:rgba(255,255,255,0.35);margin-top:4px}
.footer__col-title{font-size:0.8125rem;font-weight:600;color:var(--color-gold);text-transform:uppercase;letter-spacing:0.1em;margin-bottom:4px}
.footer__link-list,.footer__contact-list{display:flex;flex-direction:column;gap:8px}
.footer__link{font-size:0.875rem;color:rgba(255,255,255,0.6);transition:color var(--transition)}
.footer__link:hover,.footer__link:focus-visible{color:var(--color-gold)}
.footer__contact-item{font-size:0.875rem;color:rgba(255,255,255,0.6);line-height:1.5}
.footer__contact-item .footer__link{font-size:inherit;color:rgba(255,255,255,0.6)}
.footer__contact-item .footer__link:hover{color:var(--color-gold)}

/* ===== Footer Bottom Bar ===== */
.footer__bottom-bar{position:fixed;bottom:0;left:0;right:0;z-index:900;background:linear-gradient(135deg,var(--color-primary-dark),var(--color-primary));padding:12px 24px;display:flex;justify-content:center;align-items:center;box-shadow:0 -4px 24px rgba(0,0,0,0.5)}
.footer__update-btn{background:transparent;border:2px solid var(--color-gold);color:var(--color-white);font-size:0.9375rem;font-weight:600;padding:10px 32px;border-radius:40px;letter-spacing:0.06em;transition:background var(--transition),color var(--transition),transform var(--transition);display:inline-flex;align-items:center;gap:6px}
.footer__update-btn:hover,.footer__update-btn:focus-visible{background:var(--color-gold);color:#1A1A1A;transform:scale(1.02)}

/* ===== Modal ===== */
.update-modal{display:none;position:fixed;inset:0;z-index:2000;justify-content:center;align-items:center;padding:24px}
.update-modal[data-open]{display:flex}
.update-modal__overlay{position:absolute;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.update-modal__content{position:relative;background:#1A1A1A;border:1px solid var(--color-border);border-radius:var(--radius-md);max-width:640px;width:100%;max-height:80vh;overflow-y:auto;padding:40px 36px;box-shadow:0 16px 64px rgba(0,0,0,0.6);animation:modalIn 0.35s ease-out}
@keyframes modalIn{from{opacity:0;transform:translateY(30px) scale(0.97)}to{opacity:1;transform:translateY(0) scale(1)}}
.update-modal__close{position:absolute;top:16px;right:20px;font-size:1.3rem;color:var(--color-gray);transition:color var(--transition);width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.update-modal__close:hover,.update-modal__close:focus-visible{color:var(--color-gold);background:rgba(201,169,110,0.1)}
.update-modal__title{font-size:1.6rem;font-weight:700;color:var(--color-primary);margin-bottom:20px;padding-right:32px}
.update-modal__body{color:rgba(255,255,255,0.8);font-size:0.9375rem;line-height:1.7}
.update-modal__intro{margin-bottom:20px}
.update-modal__list{list-style:disc;padding-left:20px;display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.update-modal__list li::marker{color:var(--color-gold)}
.update-modal__footnote{font-size:0.8125rem;color:var(--color-gray);border-top:1px solid var(--color-border);padding-top:16px;margin-top:8px}
.update-modal__footnote .footer__link{color:var(--color-gold);font-size:inherit}
.update-modal__footnote .footer__link:hover{text-decoration:underline}

/* ===== Button System ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;font-size:0.9375rem;font-weight:600;border-radius:40px;transition:background var(--transition),color var(--transition),border-color var(--transition),transform var(--transition);letter-spacing:0.03em;border:2px solid transparent}
.btn--primary{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--color-primary-dark);border-color:var(--color-primary-dark);transform:scale(1.02)}
.btn--ghost{background:transparent;color:var(--color-white);border-color:rgba(255,255,255,0.25)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--color-gold);color:var(--color-gold)}
.btn--gold{background:var(--color-gold);color:#1A1A1A;border-color:var(--color-gold)}
.btn--gold:hover,.btn--gold:focus-visible{background:var(--color-gold-light);border-color:var(--color-gold-light)}

/* ===== Breadcrumb ===== */
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;padding:16px 0;font-size:0.8125rem;color:var(--color-gray)}
.breadcrumb a{color:rgba(255,255,255,0.5);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--color-gold)}
.breadcrumb .breadcrumb__current{color:var(--color-white);font-weight:500}
.breadcrumb__sep{color:var(--color-gray);user-select:none}

/* ===== Section ===== */
.section{padding:clamp(2rem,6vw,5rem) 0}
.section__title{font-size:var(--h2-size);font-weight:700;margin-bottom:12px;color:var(--color-white)}
.section__subtitle{font-size:1.05rem;color:var(--color-gray);max-width:40em;margin-bottom:32px}

/* ===== Card ===== */
.card{background:var(--color-white);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-card);border:1px solid rgba(0,0,0,0.04);transition:transform var(--transition),box-shadow var(--transition);color:#1A1A1A}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card--dark{background:rgba(255,255,255,0.04);border-color:var(--color-border);color:var(--color-white)}
.card--dark:hover{background:rgba(255,255,255,0.07)}
.card__title{font-size:1.2rem;font-weight:600;color:inherit;margin-bottom:8px}
.card__text{font-size:0.9375rem;color:inherit;opacity:0.8;line-height:1.6}

/* ===== Tag ===== */
.tag{display:inline-block;padding:4px 14px;font-size:0.75rem;font-weight:500;color:var(--color-gold);border:1px solid var(--color-gold);border-radius:20px;letter-spacing:0.04em;background:transparent;transition:background var(--transition),color var(--transition)}
.tag:hover{background:var(--color-gold);color:#1A1A1A}

/* ===== Scroll Reveal ===== */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity 0.7s cubic-bezier(0.25,0.1,0.25,1),transform 0.7s cubic-bezier(0.25,0.1,0.25,1)}
[data-reveal][data-reveal-visible]{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .update-modal__content{animation:none}
  .card:hover{transform:none}
  .footer__update-btn:hover{transform:none}
  .btn:hover{transform:none}
}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .footer__inner{grid-template-columns:1fr 1fr;gap:32px}
  .footer__col--brand{grid-column:1/-1}
}
@media(max-width:768px){
  .header__inner{justify-content:space-between;padding:12px 0 6px 0}
  .header__brand{gap:10px;flex-wrap:wrap}
  .brand__name{font-size:1.4rem}
  .brand__tagline{font-size:0.65rem;padding-top:0.1em}
  .nav__toggle{display:flex}
  .header__nav-wrap{padding:0;max-height:0;overflow:hidden;transition:max-height 0.45s cubic-bezier(0.25,0.1,0.25,1),padding 0.3s}
  .header__nav[data-open] ~ .header__nav-wrap{max-height:420px;padding:8px 0 12px 0}
  .header__nav{flex-direction:column;align-items:stretch}
  .nav__list{flex-direction:column;gap:2px}
  .nav__link{padding:12px 16px;font-size:0.9375rem;text-align:center;border-radius:var(--radius-sm)}
  .nav__link[aria-current="page"]{box-shadow:none;background:rgba(201,169,110,0.12);color:var(--color-gold)}
  .footer__inner{grid-template-columns:1fr;gap:28px}
  .footer__bottom-bar{padding:10px 16px}
  .footer__update-btn{font-size:0.8125rem;padding:8px 20px;width:100%;justify-content:center}
  .update-modal__content{padding:28px 20px;margin:16px}
  .update-modal__title{font-size:1.3rem}
  .card{padding:18px}
}
@media(max-width:480px){
  .brand__name{font-size:1.2rem}
  .brand__tagline{font-size:0.6rem}
  .nav__link{padding:10px 12px;font-size:0.875rem}
}

/* ===== 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}
.flex{display:flex}
.flex-col{flex-direction:column}
.gap-8{gap:8px}
.gap-16{gap:16px}
.gap-24{gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.text-center{text-align:center}
.text-gold{color:var(--color-gold)}
.text-primary{color:var(--color-primary)}
.text-gray{color:var(--color-gray)}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-32{margin-bottom:32px}