/* roulang page: index */
:root{
  --bg:#0A0908;
  --surface:#15120F;
  --surface-hover:#1E1A15;
  --gold:#D4AF37;
  --gold-light:#F0D77B;
  --green:#1F4D3B;
  --text:#F2EEE7;
  --text-muted:#A89F94;
  --text-dim:#6B625A;
  --border:rgba(212,175,55,.22);
  --border-hover:rgba(212,175,55,.45);
  --font-serif:"Songti SC","STSong","Noto Serif CJK SC","SimSun",serif;
  --font-sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"SF Mono","Cascadia Mono",Consolas,monospace;
  --container:1240px;
  --radius-btn:2px;
  --radius-card:4px;
  --shadow-card:0 20px 60px rgba(0,0,0,.55);
  --spacing-sec:clamp(5rem,10vw,8rem);
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font-family:inherit;font-size:inherit;border:none;outline:none;background:none}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.mono{font-family:var(--font-mono)}
.badge{
  display:inline-flex;align-items:center;padding:4px 10px;
  border:1px solid var(--border);border-radius:999px;
  font-size:11px;letter-spacing:.1em;color:var(--gold);
  background:transparent;white-space:nowrap;
}
.section-no{
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;
  color:var(--gold);margin-right:14px;
}
.section-head{
  display:flex;align-items:center;gap:10px;margin-bottom:clamp(2.5rem,5vw,4rem);
}
.section-head h2{
  font-family:var(--font-serif);font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:700;letter-spacing:-.02em;color:var(--text);
}
.section-line{
  flex:1;height:1px;background:linear-gradient(90deg,var(--border),transparent);
  margin-left:18px;
}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.875rem;color:var(--text-muted);
  transition:color .3s var(--ease);
}
.text-link:hover{color:var(--gold)}
.text-link .arrow{transition:transform .3s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:80px;display:flex;align-items:center;justify-content:center;
  background:transparent;
  transition:background .4s ease,border-color .4s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(10,9,8,.9);
  border-bottom-color:var(--border);
  backdrop-filter:blur(8px);
}
.header-inner{
  width:100%;max-width:var(--container);
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;padding:0 24px;gap:16px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:28px}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;font-size:.875rem;letter-spacing:.06em;
  color:var(--text-muted);padding:6px 2px;
  transition:color .3s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;
  background:var(--gold);transition:width .35s var(--ease);
}
.nav-link:hover,.nav-link.active{color:var(--gold)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-cta{
  padding:10px 20px;border:1px solid var(--gold);
  border-radius:var(--radius-btn);font-size:.8125rem;
  color:var(--gold);letter-spacing:.08em;
  background:transparent;transition:all .35s var(--ease);
  white-space:nowrap;
}
.nav-cta:hover{background:var(--gold);color:#0A0908}
.nav-logo{text-align:center;line-height:1}
.nav-logo .logo-main{
  display:block;font-family:var(--font-serif);
  font-size:1.375rem;font-weight:700;letter-spacing:.1em;color:var(--text);
}
.nav-logo .logo-sub{
  display:block;margin-top:6px;font-size:10px;
  letter-spacing:.2em;color:var(--gold);
}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{
  display:block;width:24px;height:2px;background:var(--text);
  margin:5px 0;transition:transform .35s var(--ease),opacity .3s ease;
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Mobile Menu ===== */
.mobile-menu{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:900;
  background:#000;display:none;
  flex-direction:column;justify-content:center;align-items:center;
  gap:0;
}
.mobile-menu.open{display:flex}
.mobile-menu .mobile-link{
  position:relative;
  font-family:var(--font-serif);font-size:1.25rem;
  color:var(--text);padding:24px 0;letter-spacing:.08em;
  border-bottom:1px solid var(--border);
  width:min(300px,80%);text-align:center;
  transition:color .3s ease;
}
.mobile-menu .mobile-link:hover,.mobile-menu .mobile-link.active{color:var(--gold)}
.mobile-menu .mobile-cta{
  margin-top:40px;padding:14px 36px;border:1px solid var(--gold);
  border-radius:var(--radius-btn);color:var(--gold);font-size:.9375rem;
  letter-spacing:.1em;transition:all .35s var(--ease);
}
.mobile-menu .mobile-cta:hover{background:var(--gold);color:#0A0908}
.mobile-menu .menu-copy{
  position:absolute;bottom:40px;font-size:.75rem;color:var(--text-dim);
  letter-spacing:.1em;
}

/* ===== Hero ===== */
.hero{
  min-height:640px;height:100vh;display:flex;align-items:center;
  position:relative;background:#000;
}
.hero-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  z-index:0;
}
.hero-bg::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.4) 0%,rgba(0,0,0,.72) 60%,#0A0908 100%);
}
.hero-inner{
  position:relative;z-index:1;width:100%;
  max-width:var(--container);margin:0 auto;padding:0 24px;
}
.hero-tag{
  display:inline-block;font-size:.75rem;letter-spacing:.2em;
  color:var(--gold);border:1px solid var(--border);
  padding:6px 14px;border-radius:999px;margin-bottom:28px;
}
.hero h1{
  font-family:var(--font-serif);
  font-size:clamp(2.75rem,7vw,5.5rem);
  font-weight:700;letter-spacing:-.02em;line-height:1.12;
  max-width:960px;
}
.hero h1 .break{display:block}
.hero-sub{
  margin-top:24px;font-size:clamp(.9375rem,1.5vw,1.125rem);
  color:var(--text-muted);max-width:520px;line-height:1.8;
}
.hero-actions{display:flex;gap:16px;margin-top:42px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:var(--radius-btn);
  font-size:.875rem;letter-spacing:.1em;font-weight:500;
  cursor:pointer;transition:all .35s var(--ease);
}
.btn-gold{background:var(--gold);color:#0A0908}
.btn-gold:hover{
  background:var(--gold-light);transform:translateY(-1px);
  box-shadow:0 12px 30px rgba(212,175,55,.18);
}
.btn-outline{border:1px solid var(--gold);color:var(--gold);background:transparent}
.btn-outline:hover{background:var(--gold);color:#0A0908}
.scroll-indicator{
  position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  z-index:1;display:flex;flex-direction:column;align-items:center;
  gap:10px;padding-bottom:32px;
}
.scroll-indicator .scroll-line{
  width:1px;height:52px;background:var(--border);position:relative;
  overflow:hidden;
}
.scroll-indicator .scroll-line::after{
  content:"";position:absolute;left:0;top:-50%;width:100%;height:50%;
  background:var(--gold);animation:scrollDrop 2s var(--ease) infinite;
}
.scroll-indicator .scroll-text{
  font-family:var(--font-mono);font-size:.625rem;letter-spacing:.3em;
  color:var(--text-dim);
}
@keyframes scrollDrop{
  0%{top:-50%}
  100%{top:110%}
}

/* ===== Horizontal Scroll ===== */
.hscroll-section{padding:var(--spacing-sec) 0}
.hscroll-wrap{position:relative}
.hscroll-nav{display:flex;gap:10px}
.hscroll-nav .scroll-btn{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--border);color:var(--text-muted);
  font-size:1.125rem;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all .35s var(--ease);background:transparent;
}
.hscroll-nav .scroll-btn:hover{border-color:var(--gold);color:var(--gold)}
@media(max-width:1023px){
  .hscroll-nav{display:none}
}
.hscroll-track{
  display:flex;gap:16px;overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 4px 16px;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
}
.hscroll-track::-webkit-scrollbar{display:none}
.hscroll-card{
  flex:0 0 280px;scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);overflow:hidden;
  transition:border-color .4s ease,transform .4s var(--ease);
  position:relative;
}
.hscroll-card:hover{border-color:var(--border-hover);transform:translateY(-4px)}
.hscroll-card .card-img{
  position:relative;aspect-ratio:4/5;overflow:hidden;
}
.hscroll-card .card-img img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .6s var(--ease);
}
.hscroll-card:hover .card-img img{transform:scale(1.03)}
.hscroll-card .card-badge{
  position:absolute;top:12px;left:12px;
  background:rgba(10,9,8,.75);padding:3px 10px;
  border:1px solid var(--border);border-radius:999px;
  font-size:10px;letter-spacing:.14em;color:var(--gold);
}
.hscroll-card .card-info{padding:16px}
.hscroll-card .card-title{
  font-family:var(--font-serif);font-size:1.0625rem;font-weight:600;
  line-height:1.4;color:var(--text);margin-bottom:10px;
  transition:color .3s ease;
}
.hscroll-card:hover .card-title{color:var(--gold)}
.hscroll-card .card-meta{
  font-family:var(--font-mono);font-size:.6875rem;
  color:var(--text-dim);letter-spacing:.08em;
}

/* ===== Featured ===== */
.featured-section{padding:var(--spacing-sec) 0;border-top:1px solid var(--border)}
.featured-grid{
  display:grid;grid-template-columns:60% 1fr;gap:16px;
  align-items:stretch;
}
.featured-card{
  position:relative;display:block;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .4s ease;
}
.featured-card:hover{border-color:var(--border-hover)}
.featured-card .featured-img{overflow:hidden}
.featured-card .featured-img img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .6s var(--ease);
}
.featured-card:hover .featured-img img{transform:scale(1.03)}
.featured-lg{height:480px}
.featured-lg .featured-img{position:absolute;inset:0}
.featured-lg .featured-info{
  position:absolute;left:0;right:0;bottom:0;
  padding:32px;
  background:linear-gradient(180deg,transparent,rgba(10,9,8,.92) 70%);
}
.featured-no{
  position:absolute;top:20px;left:24px;z-index:1;
  font-family:var(--font-mono);font-size:2.5rem;font-weight:700;
  color:var(--gold);line-height:1;
}
.featured-lg .featured-no{top:24px;left:28px}
.featured-lg h3{
  font-family:var(--font-serif);font-size:clamp(1.25rem,2.2vw,1.75rem);
  color:var(--text);margin-bottom:12px;transition:color .3s ease;
}
.featured-card:hover h3{color:var(--gold)}
.featured-lg p{
  font-size:.875rem;color:var(--text-muted);
  line-height:1.7;max-width:420px;
}
.featured-stack{display:grid;grid-template-rows:1fr 1fr;gap:16px}
.featured-sm{height:232px;display:flex;flex-direction:column;justify-content:flex-end}
.featured-sm .featured-img{position:absolute;inset:0}
.featured-sm .featured-info{
  position:relative;z-index:1;padding:20px;
  background:linear-gradient(180deg,transparent,rgba(10,9,8,.92) 70%);
}
.featured-sm h3{
  font-family:var(--font-serif);font-size:1rem;font-weight:600;
  color:var(--text);margin-bottom:4px;transition:color .3s ease;
}
.featured-card:hover h3{color:var(--gold)}
.featured-sm p{font-size:.8125rem;color:var(--text-muted)}
.enter-arrow{
  position:absolute;right:18px;bottom:18px;z-index:2;
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--border);color:var(--gold);
  display:flex;align-items:center;justify-content:center;
  font-size:1rem;background:rgba(10,9,8,.55);
  transition:all .35s var(--ease);
}
.featured-card:hover .enter-arrow{
  background:var(--gold);color:#0A0908;border-color:var(--gold);
}
@media(max-width:1023px){
  .featured-grid{grid-template-columns:1fr}
  .featured-lg{height:360px}
  .featured-stack{grid-template-columns:1fr 1fr}
  .featured-sm{height:232px}
}
@media(max-width:640px){
  .featured-stack{grid-template-columns:1fr}
  .featured-sm{height:220px}
}

/* ===== Playlist / Guide ===== */
.guide-section{padding:var(--spacing-sec) 0}
.playlist-list{display:flex;flex-direction:column}
.playlist-row{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;padding:28px 16px;border-bottom:1px solid var(--border);
  transition:background .35s ease;
}
.playlist-row:first-child{border-top:1px solid var(--border)}
.playlist-row:hover{background:var(--surface)}
.playlist-info h3{
  font-family:var(--font-serif);font-size:1.125rem;font-weight:600;
  color:var(--text);margin-bottom:6px;
  transition:color .3s ease;
}
.playlist-row:hover h3{color:var(--gold)}
.playlist-info p{font-size:.875rem;color:var(--text-muted)}
.playlist-thumbs{display:flex;gap:8px}
.playlist-thumbs img{
  width:96px;height:96px;object-fit:cover;border-radius:2px;
  border:1px solid var(--border);transition:border-color .35s ease;
}
.playlist-row:hover .playlist-thumbs img{border-color:var(--border-hover)}
@media(max-width:768px){
  .playlist-row{flex-direction:column;align-items:flex-start;gap:14px}
  .playlist-thumbs img{
    width:calc((100vw - 80px - 16px)/3);height:auto;aspect-ratio:1;
  }
}

/* ===== News List ===== */
.news-section{padding:var(--spacing-sec) 0;border-top:1px solid var(--border)}
.news-list{display:flex;flex-direction:column}
.news-row{
  display:grid;grid-template-columns:130px 1fr 170px;
  align-items:center;gap:20px;padding:22px 12px;
  border-top:1px solid var(--border);
  transition:background .3s ease;
}
.news-row:first-child{border-top:none}
.news-row:hover{background:var(--surface)}
.news-date{
  font-family:var(--font-mono);font-size:.6875rem;
  color:var(--gold);letter-spacing:.1em;
}
.news-body{display:flex;flex-direction:column;gap:4px;min-width:0}
.news-title{
  font-family:var(--font-serif);font-size:1.0625rem;font-weight:600;
  color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  transition:color .3s ease;
}
.news-row:hover .news-title{color:var(--gold)}
.news-desc{
  font-size:.8125rem;color:var(--text-muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-side{display:flex;align-items:center;justify-content:flex-end;gap:12px}
.news-arrow{
  color:var(--text-dim);font-size:1rem;
  transition:transform .3s var(--ease),color .3s ease;
}
.news-row:hover .news-arrow{color:var(--gold);transform:translateX(4px)}
@media(max-width:768px){
  .news-row{grid-template-columns:1fr;gap:8px;padding:20px 8px}
  .news-date{font-size:.625rem}
  .news-side{display:none}
  .news-title{font-size:1rem}
}

/* ===== Empty State ===== */
.empty-state{
  padding:80px 20px;text-align:center;
  border-top:1px solid var(--border);
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 20px;
  border:2px solid var(--gold);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--gold);font-size:22px;
  opacity:.85;
}
.empty-state p{font-size:1.0625rem;color:var(--text-muted);margin-bottom:16px}
.empty-state .text-link{color:var(--gold)}

/* ===== CTA Subscribe ===== */
.cta-section{
  padding:clamp(4rem,8vw,7rem) 0;
  background:var(--green);position:relative;overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(45deg,rgba(212,175,55,.04) 25%,transparent 25%,transparent 50%,rgba(212,175,55,.04) 50%,rgba(212,175,55,.04) 75%,transparent 75%);
  background-size:32px 32px;
}
.cta-inner{position:relative;z-index:1;text-align:center;max-width:620px;margin:0 auto}
.cta-inner h2{
  font-family:var(--font-serif);font-size:clamp(1.75rem,3.5vw,2.5rem);
  color:var(--text);font-weight:700;letter-spacing:-.01em;
}
.cta-inner h2 .gold{color:var(--gold)}
.cta-inner .cta-sub{
  margin-top:16px;font-size:.9375rem;color:rgba(242,238,231,.72);
}
.subscribe-form{
  display:flex;gap:0;margin-top:40px;max-width:520px;
  margin-left:auto;margin-right:auto;
}
.subscribe-form input{
  flex:1;background:transparent;border:none;border-bottom:2px solid rgba(212,175,55,.55);
  padding:14px 6px;color:var(--text);font-size:.9375rem;
  border-radius:0;transition:border-color .3s ease;
}
.subscribe-form input::placeholder{color:rgba(242,238,231,.4)}
.subscribe-form input:focus{border-bottom-color:var(--gold-light)}
.subscribe-form button{
  padding:14px 28px;background:var(--gold);color:#0A0908;
  border-radius:var(--radius-btn);font-size:.875rem;letter-spacing:.1em;
  font-weight:500;cursor:pointer;margin-left:16px;
  transition:background .3s ease,transform .3s ease;
}
.subscribe-form button:hover{background:var(--gold-light);transform:translateY(-1px)}
.form-note{
  margin-top:16px;font-size:.75rem;
  color:rgba(242,238,231,.5);letter-spacing:.04em;
}

/* ===== FAQ ===== */
.faq-section{padding:var(--spacing-sec) 0}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  border-bottom:1px solid var(--border);
  transition:background .35s ease;
}
.faq-item.open{background:var(--surface)}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:22px 12px;cursor:pointer;text-align:left;
  font-size:1rem;font-weight:500;color:var(--text);
  background:none;border:none;
  gap:16px;
}
.faq-plus{
  position:relative;flex-shrink:0;width:14px;height:14px;
}
.faq-plus::before,.faq-plus::after{
  content:"";position:absolute;background:var(--gold);border-radius:1px;
  transition:transform .35s var(--ease);
}
.faq-plus::before{left:0;top:6px;width:14px;height:2px}
.faq-plus::after{left:6px;top:0;width:2px;height:14px}
.faq-item.open .faq-plus::after{transform:scaleY(0)}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .4s var(--ease);
}
.faq-answer-inner{
  padding:0 12px 24px 24px;font-size:.875rem;
  color:var(--text-muted);line-height:1.8;
}
.faq-item.open .faq-answer{max-height:300px}

/* ===== Footer ===== */
.site-footer{
  background:var(--bg);border-top:1px solid var(--border);
  padding:clamp(3rem,6vw,5rem) 0 2rem;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;
  gap:40px;max-width:var(--container);margin:0 auto;padding:0 24px;
}
.footer-brand .footer-logo{
  font-family:var(--font-serif);font-size:1.25rem;font-weight:700;
  color:var(--text);letter-spacing:.08em;display:block;
}
.footer-brand .footer-logo-sub{
  display:block;margin-top:8px;font-size:10px;
  letter-spacing:.2em;color:var(--gold);
}
.footer-brand p{
  margin-top:20px;font-size:.875rem;color:var(--text-muted);line-height:1.7;
}
.footer-col h4{
  font-size:.8125rem;font-weight:500;color:var(--gold);
  letter-spacing:.14em;margin-bottom:20px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{
  font-size:.875rem;color:var(--text-muted);
  transition:color .3s ease,padding-left .3s ease;
}
.footer-col a:hover{color:var(--gold);padding-left:4px}
.footer-bottom{
  max-width:var(--container);margin:0 auto;padding:2.5rem 24px 0;
  border-top:1px solid rgba(212,175,55,.08);
  margin-top:clamp(2rem,4vw,3rem);
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
.footer-bottom p{font-size:.75rem;color:var(--text-dim);letter-spacing:.06em}
.footer-bottom .tech{
  font-family:var(--font-mono);font-size:.6875rem;
  color:var(--text-dim);
}
@media(max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
}

/* ===== Reveal Animation ===== */
.reveal{
  opacity:0;transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media(max-width:1023px){
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:block}
  .header-inner{grid-template-columns:1fr auto;justify-content:space-between}
  .nav-logo{justify-self:start}
  .hero{height:80vh;min-height:560px}
  .hscroll-card{flex-basis:78vw}
  .section-head{flex-wrap:wrap}
}
@media(max-width:520px){
  .container{padding:0 20px}
  .hero h1{font-size:clamp(2.125rem,8vw,2.75rem);letter-spacing:0}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px}
  .hero-actions .btn{justify-content:center}
  .scroll-indicator{padding-bottom:24px}
  .featured-lg{height:320px}
  .featured-lg .featured-info{padding:22px}
  .featured-lg h3{font-size:1.125rem}
  .playlist-row{padding:20px 8px}
  .news-list .news-row{padding-left:0;padding-right:0}
  .subscribe-form{flex-direction:column;gap:12px}
  .subscribe-form button{margin-left:0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root {
  --bg: #0A0908;
  --surface: #15120F;
  --surface-hover: #1E1A15;
  --gold: #D4AF37;
  --gold-light: #F0D77B;
  --green: #1F4D3B;
  --text: #F2EEE7;
  --text-secondary: #A89F94;
  --text-muted: #6B625A;
  --border: rgba(212, 175, 55, 0.22);
  --border-hover: rgba(212, 175, 55, 0.45);
  --radius: 4px;
  --radius-btn: 2px;
  --font-serif: "Songti SC", "STSong", "Noto Serif CJK SC", "SimSun", serif;
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Mono", Consolas, monospace;
  --container: 1240px;
  --section-space: clamp(5rem, 10vw, 8rem);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease;
}

.site-header.scrolled {
  background: rgba(10, 9, 8, 0.92);
  border-bottom-color: var(--border);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  position: relative;
  color: var(--text-secondary);
  font-size: 14px;
  letter-spacing: 0.05em;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold-light);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  line-height: 1.2;
}

.logo-main {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.logo-sub {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-top: 4px;
}

.nav-cta {
  background: var(--gold);
  color: var(--bg);
  padding: 9px 20px;
  font-size: 13px;
  letter-spacing: 0.06em;
  border-radius: var(--radius-btn);
  transition: background 0.3s ease, transform 0.3s ease;
}

.nav-cta:hover {
  background: var(--gold-light);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1102;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Drawer ---------- */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: #000;
  padding: 120px 40px 40px;
  display: flex;
  flex-direction: column;
  z-index: 1101;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  overflow-y: auto;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.drawer-nav {
  display: flex;
  flex-direction: column;
}

.drawer-link {
  padding: 16px 0;
  font-size: 22px;
  color: var(--text);
  border-bottom: 1px solid rgba(212, 175, 55, 0.18);
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.drawer-link:hover {
  color: var(--gold-light);
  padding-left: 8px;
}

.drawer-cta {
  display: inline-block;
  margin-top: 32px;
  text-align: center;
  background: var(--gold);
  color: var(--bg);
  padding: 14px 24px;
  font-size: 16px;
  border-radius: var(--radius-btn);
}

.drawer-copy {
  margin-top: auto;
  padding-top: 48px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* ---------- Article Hero ---------- */
.article-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  padding: 160px 0 64px;
  background:
    linear-gradient(180deg, rgba(10, 9, 8, 0.88) 0%, rgba(10, 9, 8, 0.75) 40%, rgba(10, 9, 8, 0.94) 100%),
    url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
}

.breadcrumb {
  margin-bottom: 36px;
}

.breadcrumb a,
.breadcrumb span {
  font-size: 13px;
  letter-spacing: 0.04em;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.breadcrumb a:hover {
  color: var(--gold-light);
}

.breadcrumb .sep {
  color: var(--text-muted);
  margin: 0 10px;
}

.breadcrumb .current {
  color: var(--gold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
  vertical-align: middle;
}

.hero-body {
  max-width: 920px;
}

.cate-badge {
  display: inline-block;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold-light);
  background: rgba(10, 9, 8, 0.4);
  margin-bottom: 20px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 18px;
}

.article-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 720px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 22px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.meta-divider {
  color: var(--text-muted);
}

/* ---------- Article Body ---------- */
.article-body-wrap {
  padding: var(--section-space) 0 0;
}

.article-container {
  max-width: 800px;
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body p {
  margin-bottom: 24px;
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.5vw, 2rem);
  color: var(--text);
  margin: 64px 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  line-height: 1.4;
}

.article-body h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text);
  margin: 40px 0 16px;
  padding-left: 12px;
  border-left: 2px solid rgba(212, 175, 55, 0.6);
  line-height: 1.45;
}

.article-body blockquote {
  border-left: 3px solid var(--gold);
  background: var(--surface);
  padding: 24px 28px;
  margin: 32px 0;
  color: var(--text-secondary);
  font-style: normal;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.article-body blockquote p {
  margin-bottom: 0;
}

.article-body img {
  width: 100%;
  border-radius: var(--radius);
  margin: 32px 0 12px;
  border: 1px solid var(--border);
}

.article-body figure {
  margin: 32px 0;
}

.article-body figcaption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

.article-body ul {
  margin: 24px 0;
  padding-left: 4px;
}

.article-body ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
}

.article-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  background: var(--gold);
}

.article-body ol {
  margin: 24px 0;
  padding-left: 24px;
  counter-reset: article-ol;
}

.article-body ol li {
  counter-increment: article-ol;
  margin-bottom: 12px;
  padding-left: 8px;
}

.article-body ol li::marker {
  color: var(--gold);
  font-family: var(--font-mono);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}

.article-body table thead th {
  text-align: left;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--gold);
  color: var(--gold-light);
  font-weight: 600;
  background: var(--surface);
  white-space: nowrap;
}

.article-body table tbody td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
}

.article-body table tbody tr:hover {
  background: rgba(212, 175, 55, 0.05);
}

.article-body a {
  color: var(--gold-light);
  border-bottom: 1px solid rgba(212, 175, 55, 0.4);
  transition: border-color 0.3s ease, color 0.3s ease;
}

.article-body a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ---------- Empty State ---------- */
.article-empty {
  text-align: center;
  padding: 80px 20px;
}

.article-empty .empty-line {
  display: inline-block;
  width: 48px;
  height: 48px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  margin-bottom: 24px;
  position: relative;
}

.article-empty .empty-line::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  border-left: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: translate(-50%, -50%) rotate(-45deg);
}

.article-empty p {
  font-size: 18px;
  color: var(--text);
  margin-bottom: 16px;
}

.article-empty a {
  display: inline-block;
  color: var(--gold-light);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.article-empty a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- Tag Area ---------- */
.tag-area {
  margin: 48px 0 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-badge {
  display: inline-block;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  background: transparent;
  transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.tag-badge:hover {
  color: var(--gold-light);
  border-color: var(--border-hover);
  background: var(--surface);
}

/* ---------- Article Nav ---------- */
.article-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 56px 0 0;
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 15px;
  transition: color 0.3s ease, gap 0.3s ease;
}

.back-link .back-arrow {
  color: var(--gold);
  font-size: 18px;
  transition: transform 0.3s ease;
}

.back-link:hover {
  color: var(--gold-light);
}

.back-link:hover .back-arrow {
  transform: translateX(-4px);
}

.to-top {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.3s ease;
}

.to-top:hover {
  color: var(--gold);
}

/* ---------- Related Section ---------- */
.article-related {
  padding: var(--section-space) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}

.section-head .sec-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 8px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
}

.related-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}

.related-card .cover {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.related-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-card:hover .cover img {
  transform: scale(1.03);
}

.related-card .related-body {
  padding: 20px;
}

.related-card h3 {
  font-size: 17px;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.related-card:hover h3 {
  color: var(--gold-light);
}

.related-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.related-card .related-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: gap 0.3s ease;
}

.related-card .related-link span {
  transition: transform 0.3s ease;
}

.related-card:hover .related-link span {
  transform: translateX(4px);
}

/* ---------- FAQ ---------- */
.article-faq {
  padding: 0 0 var(--section-space);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.3s ease;
}

.faq-q .plus {
  position: relative;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.faq-q .plus::before,
.faq-q .plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  background: var(--gold);
  transition: transform 0.35s ease;
}

.faq-q .plus::before {
  transform: translate(-50%, -50%);
}

.faq-q .plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.active .faq-q .plus::before {
  transform: translate(-50%, -50%) rotate(180deg);
}

.faq-item.active .faq-q .plus::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-item.active .faq-q {
  color: var(--gold-light);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  padding-left: 20px;
}

.faq-a-inner {
  padding-bottom: 22px;
}

/* ---------- CTA ---------- */
.article-cta {
  background: var(--green);
  position: relative;
  padding: clamp(4rem, 8vw, 6rem) 0;
  text-align: center;
  overflow: hidden;
}

.article-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent 0 12px, rgba(255, 255, 255, 0.02) 12px 13px);
}

.article-cta .cta-inner {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto;
  padding: 0 24px;
}

.article-cta h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--text);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.btn-gold {
  display: inline-block;
  background: var(--gold);
  color: var(--bg);
  padding: 14px 32px;
  font-size: 15px;
  letter-spacing: 0.04em;
  border-radius: var(--radius-btn);
  transition: background 0.3s ease, transform 0.3s ease;
}

.btn-gold:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-block;
  border: 1px solid var(--gold);
  color: var(--gold-light);
  padding: 13px 30px;
  font-size: 15px;
  letter-spacing: 0.04em;
  border-radius: var(--radius-btn);
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.btn-ghost:hover {
  background: var(--gold);
  color: var(--bg);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 72px 0 0;
}

.footer-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 56px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.06em;
}

.footer-logo-sub {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-top: 4px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 220px;
}

.footer-col h4 {
  font-size: 15px;
  color: var(--text);
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-col ul li a:hover {
  color: var(--gold-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  padding: 28px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-bottom .tech {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .header-inner {
    justify-content: space-between;
  }

  .nav-left,
  .nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-logo {
    position: static;
    transform: none;
  }

  .logo-main {
    font-size: 20px;
  }

  .article-hero {
    padding: 140px 0 48px;
    min-height: 380px;
  }

  .breadcrumb .current {
    max-width: 200px;
  }

  .article-meta {
    gap: 8px;
    font-size: 12px;
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 14px 20px;
  }

  .logo-main {
    font-size: 18px;
  }

  .logo-sub {
    font-size: 9px;
  }

  .article-hero {
    padding: 120px 0 40px;
    min-height: 340px;
  }

  .breadcrumb {
    margin-bottom: 24px;
  }

  .breadcrumb a,
  .breadcrumb span {
    font-size: 12px;
  }

  .breadcrumb .current {
    max-width: 140px;
  }

  .cate-badge {
    font-size: 12px;
    padding: 4px 12px;
    margin-bottom: 16px;
  }

  .article-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
  }

  .article-lead {
    font-size: 14px;
    line-height: 1.7;
  }

  .article-meta {
    font-size: 11px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.85;
  }

  .article-body h2 {
    margin-top: 48px;
    font-size: 1.4rem;
  }

  .article-body h3 {
    margin-top: 32px;
    font-size: 1.15rem;
  }

  .article-body blockquote {
    padding: 18px 20px;
  }

  .article-nav {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .section-head h2 {
    font-size: 1.6rem;
  }

  .faq-q {
    font-size: 15px;
    padding: 18px 2px;
  }

  .faq-a {
    font-size: 13px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-gold,
  .btn-ghost {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* roulang page: category1 */
:root {
  --bg: #0A0908;
  --surface: #15120F;
  --surface-hover: #1E1A15;
  --gold: #D4AF37;
  --gold-bright: #F0D77B;
  --green: #1F4D3B;
  --text: #F2EEE7;
  --text-secondary: #A89F94;
  --text-muted: #6B625A;
  --border: rgba(212, 175, 55, 0.22);
  --border-hover: rgba(212, 175, 55, 0.45);
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-pill: 999px;
  --space-section: clamp(5rem, 10vw, 8rem);
  --font-title: "Songti SC", "STSong", "Noto Serif CJK SC", "SimSun", serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Mono", Consolas, monospace;
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

button, input {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s;
}

.site-header.scrolled {
  background: rgba(10, 9, 8, 0.92);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 36px;
  justify-self: start;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 30px;
  justify-self: end;
}

.nav-link {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--text);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.4s ease;
}

.nav-link:hover {
  color: var(--gold-bright);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--gold);
}

.nav-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-self: center;
  line-height: 1;
  gap: 6px;
  text-align: center;
}

.logo-main {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  white-space: nowrap;
}

.logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.42em;
  color: var(--gold);
  position: relative;
  padding-left: 0.42em;
}

.nav-cta {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--bg);
  background: var(--gold);
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  transition: background 0.4s, transform 0.4s;
}

.nav-cta:hover {
  background: var(--gold-bright);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: #050404;
  z-index: 95;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 26px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
}

.m-drawer-link {
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--text);
  border-bottom: 1px solid rgba(212, 175, 55, 0.12);
  padding-bottom: 10px;
  min-width: 200px;
  text-align: center;
}

.m-drawer-link:hover,
.m-drawer-link.active {
  color: var(--gold);
}

.drawer-copy {
  position: absolute;
  bottom: 40px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.breadcrumb a {
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  transition: color 0.3s;
}

.breadcrumb a:hover {
  color: var(--gold-bright);
}

.breadcrumb span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.breadcrumb .current {
  color: var(--gold);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.4s, color 0.4s, border-color 0.4s, box-shadow 0.4s, transform 0.4s;
}

.btn-primary {
  background: var(--gold);
  color: #0A0908;
  border: 1px solid var(--gold);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold);
}

.btn-outline:hover {
  background: var(--gold);
  color: #0A0908;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.18);
}

.btn-center {
  margin: 0 auto;
  display: flex;
  width: fit-content;
}

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  min-height: 58vh;
  display: flex;
  align-items: center;
  padding: 160px 0 90px;
  background: linear-gradient(180deg, rgba(10, 9, 8, 0.45) 0%, rgba(10, 9, 8, 0.65) 45%, var(--bg) 96%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}

.category-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}

.hero-tag {
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: rgba(10, 9, 8, 0.5);
}

.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 50%;
}

.hero-title {
  font-family: var(--font-title);
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--text);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ===== Intro Sections ===== */
.intro-section {
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--border);
}

.intro-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.intro-wrap.flip .intro-media {
  order: 2;
}

.intro-wrap.flip .intro-text {
  order: 1;
}

.intro-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-bottom: 14px;
  display: block;
}

.intro-text h2 {
  font-family: var(--font-title);
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text);
}

.intro-text p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.intro-divider {
  width: 52px;
  height: 2px;
  background: var(--gold);
  margin-bottom: 22px;
}

.intro-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition);
}

.intro-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.intro-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(212, 175, 55, 0.08), transparent 50%);
  pointer-events: none;
}

.intro-media:hover img {
  transform: scale(1.02);
  border-color: var(--border-hover);
}

/* ===== Index List ===== */
.index-section {
  padding: var(--space-section) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 52px;
}

.section-head-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.18em;
  margin-bottom: 10px;
  display: block;
}

.section-head h2 {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.3;
  color: var(--text);
}

.index-list {
  border-top: 1px solid var(--border);
}

.index-item {
  display: grid;
  grid-template-columns: 90px 1fr 280px auto;
  gap: 28px;
  align-items: center;
  padding: 34px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.4s;
  border-radius: var(--radius-md);
}

.index-item:hover {
  background: rgba(212, 175, 55, 0.05);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  color: var(--gold);
  line-height: 1;
  font-weight: 700;
}

.index-main {
  min-width: 0;
}

.index-main h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  color: var(--text);
  margin-bottom: 8px;
}

.index-main p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.index-arrow {
  font-size: 1.4rem;
  color: var(--gold);
  text-align: right;
  transition: transform 0.4s;
}

.index-item:hover .index-arrow {
  transform: translateX(5px);
}

/* ===== Topic Grid ===== */
.topic-section {
  padding: var(--space-section) 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.topic-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
  display: block;
}

.topic-card:nth-child(even) {
  transform: translateY(28px);
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.topic-card:nth-child(even):hover {
  transform: translateY(4px);
}

.topic-card-media {
  overflow: hidden;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.topic-card-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.5s;
}

.topic-card:hover .topic-card-media img {
  transform: scale(1.04);
}

.topic-card-body {
  padding: 24px;
}

.topic-card-body .tag {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.topic-card-body h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 10px;
}

.topic-card-body p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}

.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background 0.4s;
}

.faq-item.open {
  background: var(--surface);
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 24px 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.03em;
}

.faq-icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  background: var(--gold);
  transform: translate(-50%, -50%);
  transition: transform 0.35s ease;
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.faq-a {
  display: none;
  padding: 0 8px 28px 28px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.open .faq-a {
  display: block;
}

/* ===== CTA ===== */
.cat-cta {
  background: var(--green);
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cat-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(212, 175, 55, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--text);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-title .brand-inline {
  color: var(--gold-bright);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

.footer-grid {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.footer-logo {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.footer-logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  padding-left: 0.4em;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  position: relative;
  transition: color 0.3s, padding-left 0.3s;
}

.footer-col ul a:hover {
  color: var(--gold-bright);
  padding-left: 4px;
}

.footer-bottom {
  max-width: 1240px;
  margin: 48px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-bottom .tech {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    grid-template-columns: none;
    gap: 0;
    padding: 14px 20px;
  }

  .nav-left,
  .nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .logo-main {
    font-size: 1.15rem;
  }

  .category-hero {
    min-height: 64vh;
    padding: 140px 0 70px;
  }

  .intro-wrap,
  .intro-wrap.flip {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .intro-wrap.flip .intro-media {
    order: 1;
  }

  .intro-wrap.flip .intro-text {
    order: 2;
  }

  .index-item {
    grid-template-columns: 60px 1fr auto;
    gap: 16px;
    padding: 26px 8px;
  }

  .index-desc {
    grid-column: 2 / 3;
  }

  .index-arrow {
    grid-row: 1 / 3;
    grid-column: 3 / 4;
  }

  .topic-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .topic-card:nth-child(even) {
    transform: none;
  }

  .topic-card:nth-child(even):hover {
    transform: translateY(-4px);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 12px 16px;
  }

  .category-hero {
    padding: 120px 0 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-title {
    font-size: clamp(1.9rem, 6vw, 2.6rem);
  }

  .hero-sub {
    font-size: 0.95rem;
  }

  .index-item {
    grid-template-columns: 48px 1fr auto;
    gap: 12px;
  }

  .index-num {
    font-size: 1.8rem;
  }

  .index-main h3 {
    font-size: 1.05rem;
  }

  .index-main p {
    font-size: 0.85rem;
  }

  .topic-card-body {
    padding: 18px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 36px;
  }

  .faq-wrap {
    padding: 0;
  }

  .faq-q {
    padding: 20px 4px;
    font-size: 0.95rem;
  }

  .faq-a {
    padding: 0 4px 22px 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .index-item {
    grid-template-columns: 40px 1fr;
  }

  .index-num {
    font-size: 1.5rem;
  }

  .index-arrow {
    display: none;
  }

  .logo-sub {
    letter-spacing: 0.2em;
    padding-left: 0.2em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}