/* ========== Reset ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--jn-font-body);font-size:1rem;line-height:1.75;color:var(--jn-text);background:var(--jn-bg);transition:background .35s ease,color .35s ease}
:where(ul,ol){list-style:none;margin:0;padding:0}
:where(h1,h2,h3,h4,h5,h6){margin:0;font-family:var(--jn-font-heading);font-weight:900;line-height:1.25;color:var(--jn-heading)}
p{margin:0 0 1em}
a{color:inherit}
img{max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;padding:0}
summary{cursor:pointer}
::selection{background:var(--jn-gold);color:var(--jn-navy)}
:where(a,button,[tabindex]):focus-visible{outline:3px solid var(--jn-gold);outline-offset:3px;border-radius:4px}

/* ========== Variables ========== */
:root{
  --jn-navy:#0A1E3C;
  --jn-gold:#C9A227;
  --jn-red:#D64541;
  --jn-cream:#F7F3EA;
  --jn-white:#FFFFFF;
  --jn-ink:#1A1A1A;
  --jn-gray:#6B6B6B;
  --jn-teal:#2A9D8F;
  --jn-light-gold:#E4D5A8;
  --jn-dark-red:#8B2C2C;
  --jn-bg:#F7F3EA;
  --jn-surface:#FFFFFF;
  --jn-text:#1A1A1A;
  --jn-heading:#0A1E3C;
  --jn-muted:#6B6B6B;
  --jn-line:#E4D5A8;
  --jn-shadow:0 8px 30px rgba(10,30,60,0.12);
  --jn-shadow-strong:0 14px 44px rgba(10,30,60,0.22);
  --jn-font-heading:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --jn-font-body:'Noto Serif SC','Source Han Serif SC','Songti SC',Georgia,serif;
  --jn-radius:6px;
  --jn-radius-lg:18px;
  --jn-radius-pill:999px;
  --jn-header-h:72px;
  --jn-transition:.25s ease;
}
body[data-theme="dark"]{
  --jn-bg:#0A1E3C;
  --jn-surface:#13294E;
  --jn-text:#EAF0F6;
  --jn-heading:#F7F3EA;
  --jn-muted:#98A8BF;
  --jn-line:#24436F;
  --jn-shadow:0 8px 30px rgba(0,0,0,0.35);
  --jn-shadow-strong:0 14px 44px rgba(0,0,0,0.5);
}

/* ========== Layout ========== */
.jn-container{max-width:1240px;margin:0 auto;padding:0 32px}
.jn-container--wide{max-width:1440px}
.jn-container--narrow{max-width:840px}
.jn-section{padding:80px 0;position:relative}
.jn-section__head{display:flex;align-items:baseline;gap:16px;margin-bottom:40px}
.jn-section__num{font-family:var(--jn-font-heading);font-weight:900;font-size:1.4rem;color:var(--jn-gold);letter-spacing:.05em}
.jn-section__head h2{font-size:2rem}
.jn-note-vertical{writing-mode:vertical-rl;font-family:var(--jn-font-heading);font-size:.78rem;letter-spacing:.22em;color:var(--jn-muted);text-transform:uppercase;margin:0;line-height:1.4}

/* ========== Grid ========== */
.jn-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:28px}
.jn-grid--2>*{grid-column:span 6}
.jn-grid--3>*{grid-column:span 4}
.jn-grid--4>*{grid-column:span 3}
@media(max-width:1024px){
  .jn-grid--4>*{grid-column:span 6}
  .jn-grid--3>*{grid-column:span 6}
}
@media(max-width:640px){
  .jn-grid--2>*,.jn-grid--3>*,.jn-grid--4>*{grid-column:1/-1}
}

/* ========== Header ========== */
.jn-site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,30,60,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:0;
  transition:background .3s ease,box-shadow .3s ease;
}
.jn-site-header.is-shrunk{
  background:rgba(10,30,60,.96);
  box-shadow:var(--jn-shadow-strong);
}
.jn-site-header__inner{
  max-width:1320px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:16px 32px;
  transition:padding .3s ease,background .3s ease,border-radius .3s ease,box-shadow .3s ease;
}
.jn-site-header.is-shrunk .jn-site-header__inner{
  padding:10px 20px;
  max-width:1240px;
}
.jn-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.jn-brand__mark{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:var(--jn-gold);color:var(--jn-navy);
  font-family:var(--jn-font-heading);font-weight:900;font-size:1rem;letter-spacing:.02em;
  border:2px solid var(--jn-navy);
  box-shadow:3px 3px 0 rgba(0,0,0,.28);
}
.jn-brand__mark::after{
  content:'';position:absolute;right:-4px;top:-4px;
  width:11px;height:11px;border-radius:50%;
  background:var(--jn-red);border:2px solid var(--jn-nav,#0A1E3C);
}
.jn-brand__name{
  font-family:var(--jn-font-heading);font-weight:900;font-size:1.18rem;letter-spacing:.08em;
  color:var(--jn-cream);white-space:nowrap;
}
.jn-site-nav__list{display:flex;align-items:center;gap:4px}
.jn-site-nav__link{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:var(--jn-radius-pill);
  font-family:var(--jn-font-heading);font-weight:700;font-size:.92rem;letter-spacing:.04em;
  color:rgba(247,243,234,.88);text-decoration:none;
  transition:background .2s,color .2s,transform .2s;
}
.jn-site-nav__link:hover{background:rgba(201,162,39,.22);color:var(--jn-gold)}
.jn-site-nav__link[aria-current="page"]{background:var(--jn-gold);color:var(--jn-navy);box-shadow:0 3px 0 rgba(0,0,0,.2)}
.jn-site-header__tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.jn-theme-toggle{
  width:40px;height:40px;border-radius:50%;
  border:2px solid rgba(247,243,234,.45);
  background:rgba(255,255,255,.1);
  color:var(--jn-cream);
  display:inline-flex;align-items:center;justify-content:center;
  transition:all .2s ease;
}
.jn-theme-toggle:hover{border-color:var(--jn-gold);color:var(--jn-gold);background:rgba(201,162,39,.16)}
.jn-theme-toggle svg{width:19px;height:19px}
.jn-theme-toggle__sun{display:none}
.jn-theme-toggle__moon{display:block}
body[data-theme="dark"] .jn-theme-toggle__sun{display:block}
body[data-theme="dark"] .jn-theme-toggle__moon{display:none}
.jn-nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  border:2px solid rgba(247,243,234,.45);
  background:rgba(255,255,255,.1);
  align-items:center;justify-content:center;
  transition:all .2s ease;
}
.jn-nav-toggle:hover{border-color:var(--jn-gold)}
.jn-nav-toggle__icon{display:flex;flex-direction:column;gap:5px;width:18px}
.jn-nav-toggle__bar{display:block;width:100%;height:2px;background:var(--jn-cream);border-radius:2px;transition:transform .25s ease,opacity .2s ease}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__bar:nth-child(2){opacity:0}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ========== Footer ========== */
.jn-site-footer{
  position:relative;background:var(--jn-navy);color:rgba(247,243,234,.86);
  padding:72px 0 0;margin-top:80px;
}
.jn-site-footer::before{
  content:'';display:block;position:absolute;top:-6px;left:0;right:0;height:6px;
  background:linear-gradient(90deg,var(--jn-gold) 0%,var(--jn-gold) 26%,var(--jn-red) 26%,var(--jn-red) 31%,var(--jn-gold) 31%,var(--jn-gold) 100%);
}
.jn-site-footer__grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:52px}
.jn-site-footer__brand .jn-brand__name{color:var(--jn-gold)}
.jn-site-footer__statement{font-family:var(--jn-font-heading);font-size:.88rem;line-height:1.75;color:rgba(247,243,234,.7);max-width:38ch;margin-top:18px}
.jn-site-footer__title{font-size:.95rem;letter-spacing:.14em;color:var(--jn-gold);margin-bottom:18px;text-transform:uppercase}
.jn-site-footer__list{display:flex;flex-direction:column;gap:10px;font-size:.92rem}
.jn-site-footer__list a{color:rgba(247,243,234,.78);text-decoration:none;transition:color .2s,padding-left .2s}
.jn-site-footer__list a:hover{color:var(--jn-gold);padding-left:6px}
.jn-site-footer__list li{color:rgba(247,243,234,.72)}
.jn-site-footer__bottom{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
  border-top:1px solid rgba(247,243,234,.16);
  padding:20px 0 24px;font-family:var(--jn-font-heading);font-size:.82rem;letter-spacing:.05em;
  color:rgba(247,243,234,.58);
}

/* ========== Buttons ========== */
.jn-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;
  font-family:var(--jn-font-heading);font-weight:700;font-size:.98rem;letter-spacing:.04em;
  border:2px solid var(--jn-navy);border-radius:var(--jn-radius);
  background:var(--jn-surface);color:var(--jn-navy);text-decoration:none;
  cursor:pointer;transition:all .22s ease;
}
.jn-btn:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(10,30,60,.14)}
.jn-btn--primary{background:var(--jn-gold);border-color:var(--jn-gold);color:var(--jn-navy);box-shadow:4px 4px 0 var(--jn-navy)}
.jn-btn--primary:hover{background:var(--jn-navy);border-color:var(--jn-navy);color:var(--jn-gold);box-shadow:4px 4px 0 var(--jn-gold)}
.jn-btn--ghost{background:transparent;border-color:currentColor;color:var(--jn-text)}
.jn-btn--ghost:hover{background:var(--jn-gold);border-color:var(--jn-gold);color:var(--jn-navy)}
.jn-btn--small{padding:8px 18px;font-size:.84rem}

/* ========== Cards ========== */
.jn-card{
  background:var(--jn-surface);border:2px solid var(--jn-navy);border-radius:var(--jn-radius);
  padding:28px;box-shadow:6px 6px 0 rgba(10,30,60,.13);
  transition:transform .22s ease,box-shadow .22s ease;
}
.jn-card:hover{transform:translate(-2px,-3px);box-shadow:10px 12px 0 rgba(10,30,60,.18)}
body[data-theme="dark"] .jn-card{box-shadow:6px 6px 0 rgba(0,0,0,.35)}
body[data-theme="dark"] .jn-card:hover{box-shadow:10px 12px 0 rgba(0,0,0,.4)}

/* ========== Tags ========== */
.jn-tag{
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 14px;border-radius:var(--jn-radius-pill);
  font-family:var(--jn-font-heading);font-size:.76rem;font-weight:700;letter-spacing:.06em;
  background:var(--jn-surface);border:1px solid var(--jn-line);color:var(--jn-muted);
}
.jn-tag--hot{background:var(--jn-red);border-color:var(--jn-red);color:#fff}
.jn-tag--gold{background:var(--jn-gold);border-color:var(--jn-gold);color:var(--jn-navy)}

/* ========== Breadcrumb ========== */
.jn-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-family:var(--jn-font-heading);font-size:.84rem;color:var(--jn-muted);
  padding:18px 0;
}
.jn-breadcrumb a{color:var(--jn-teal);text-decoration:none}
.jn-breadcrumb a:hover{color:var(--jn-gold)}
.jn-breadcrumb__sep{opacity:.5}

/* ========== Visual Placeholder ========== */
.jn-visual{
  position:relative;overflow:hidden;
  background:var(--jn-surface);border:2px solid var(--jn-navy);
  border-radius:var(--jn-radius);box-shadow:6px 6px 0 rgba(10,30,60,.12);
  aspect-ratio:16/9;
}
.jn-visual::before{
  content:'';position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(135deg,rgba(201,162,39,.14),transparent 52%),
    repeating-linear-gradient(45deg,var(--jn-line) 0 2px,transparent 2px 14px);
  opacity:.7;
}
.jn-visual>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.jn-visual--portrait{aspect-ratio:3/4}
.jn-visual--landscape{aspect-ratio:4/3}
.jn-visual--wide{aspect-ratio:21/9}

/* ========== Prose ========== */
.jn-prose{max-width:70ch;font-size:1.0625rem;line-height:1.85;color:var(--jn-text)}
.jn-prose h2{font-size:1.85rem;margin:2em 0 .7em;position:relative;padding-left:18px}
.jn-prose h2::before{content:'';position:absolute;left:0;top:.25em;bottom:.25em;width:5px;background:var(--jn-gold);border-radius:2px}
.jn-prose p{margin-bottom:1.4em}
.jn-prose a{color:var(--jn-teal);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.jn-prose a:hover{color:var(--jn-gold)}

/* ========== Collapse ========== */
.jn-collapse{border:2px solid var(--jn-navy);border-radius:var(--jn-radius);margin-bottom:14px;overflow:hidden;background:var(--jn-surface)}
.jn-collapse summary{
  padding:16px 22px;font-family:var(--jn-font-heading);font-weight:700;font-size:.96rem;
  background:var(--jn-surface);color:var(--jn-heading);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.jn-collapse summary::-webkit-details-marker{display:none}
.jn-collapse summary::after{content:'+';font-size:1.3rem;color:var(--jn-gold);transition:transform .25s ease}
.jn-collapse[open] summary{border-bottom:2px solid var(--jn-navy)}
.jn-collapse[open] summary::after{content:'−'}
.jn-collapse__body{padding:18px 22px;color:var(--jn-text)}

/* ========== Tabs ========== */
.jn-tabs{border:2px solid var(--jn-navy);border-radius:var(--jn-radius);overflow:hidden;background:var(--jn-surface)}
.jn-tabs__list{display:flex;border-bottom:2px solid var(--jn-navy);background:var(--jn-navy);flex-wrap:wrap}
.jn-tabs__btn{
  padding:14px 24px;background:transparent;color:rgba(247,243,234,.8);
  font-family:var(--jn-font-heading);font-weight:700;font-size:.92rem;letter-spacing:.04em;
  border-right:1px solid rgba(247,243,234,.18);transition:all .2s ease;
}
.jn-tabs__btn:hover{background:rgba(201,162,39,.2);color:var(--jn-gold)}
.jn-tabs__btn[aria-selected="true"]{background:var(--jn-gold);color:var(--jn-navy)}
.jn-tabs__panel{padding:28px;color:var(--jn-text)}

/* ========== Reveal ========== */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease}
[data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ========== Progress ========== */
.jn-progress{
  position:fixed;top:0;left:0;right:0;height:4px;z-index:300;
  background:rgba(255,255,255,.1);pointer-events:none;
}
.jn-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--jn-gold),var(--jn-red))}

/* ========== Skip Link ========== */
.jn-skip{
  position:fixed;top:-120px;left:18px;z-index:1000;
  padding:12px 26px;background:var(--jn-gold);color:var(--jn-navy);
  font-family:var(--jn-font-heading);font-weight:700;font-size:.92rem;
  border-radius:var(--jn-radius);text-decoration:none;
  box-shadow:3px 3px 0 var(--jn-navy);
  transition:top .25s ease;
}
.jn-skip:focus-visible{top:18px}

/* ========== Main ========== */
#main-content{display:block;padding-top:var(--jn-header-h);min-height:70vh}

/* ========== Responsive ========== */
@media(max-width:1024px){
  .jn-site-footer__grid{grid-template-columns:1fr 1fr;gap:36px}
  .jn-container{padding:0 24px}
}
@media(max-width:899px){
  :root{--jn-header-h:64px}
  .jn-site-header__inner{padding:12px 20px}
  .jn-site-nav{
    position:absolute;top:calc(100% + 8px);left:14px;right:14px;
    background:var(--jn-navy);border:2px solid var(--jn-gold);
    border-radius:var(--jn-radius-lg);box-shadow:0 20px 48px rgba(0,0,0,.4);
    padding:14px;opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
  }
  .jn-site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .jn-site-nav__list{flex-direction:column;gap:2px;width:100%}
  .jn-site-nav__link{display:block;padding:12px 16px;border-radius:10px;width:100%;color:var(--jn-cream)}
  .jn-site-nav__link:hover{background:rgba(255,255,255,.08);color:var(--jn-gold)}
  .jn-site-nav__link[aria-current="page"]{background:var(--jn-gold);color:var(--jn-navy)}
  .jn-nav-toggle{display:inline-flex}
  .jn-section{padding:64px 0}
}
@media(max-width:560px){
  .jn-site-footer__grid{grid-template-columns:1fr;gap:32px}
  .jn-site-footer{padding-top:56px}
  .jn-site-footer__bottom{flex-direction:column;align-items:flex-start}
  .jn-container{padding:0 18px}
  .jn-brand__name{font-size:1.05rem}
  .jn-section{padding:48px 0}
}

/* ========== Reduced 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;
  }
  [data-reveal]{opacity:1;transform:none}
}