/* roulang page: index */
:root{
  --bg-900:#060B14;
  --bg-800:#0B1424;
  --bg-700:#101C31;
  --bg-600:#16243C;
  --line-1:rgba(122,160,220,.14);
  --line-2:rgba(122,160,220,.28);
  --line-hot:rgba(33,230,193,.55);
  --brand-600:#1F55D6;
  --brand-500:#2C6BFF;
  --brand-400:#4E86FF;
  --brand-glow:rgba(44,107,255,.45);
  --accent-500:#14C9A8;
  --accent-400:#21E6C1;
  --amber-400:#FFB020;
  --danger-400:#FF6B6B;
  --text-100:#EAF1FF;
  --text-300:#A9B8D4;
  --text-500:#6C7C99;
  --r-xs:4px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-full:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset,0 12px 28px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px var(--line-2);
  --shadow-glow:0 0 0 1px rgba(33,230,193,.45) inset,0 0 22px rgba(33,230,193,.28);
  --ease:180ms cubic-bezier(.4,0,.2,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --sidebar-w:260px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-300);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(rgba(122,160,220,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,220,.035) 1px,transparent 1px);
  background-size:40px 40px;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:linear-gradient(120deg,rgba(44,107,255,.12),transparent 46%,rgba(33,230,193,.07));
  z-index:0;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-sm)}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;color:var(--text-100);font-weight:700;letter-spacing:-.01em}
h1{font-size:44px;line-height:1.15}
h2{font-size:30px;line-height:1.25}
h3{font-size:20px;line-height:1.4}
h4{font-size:17px;line-height:1.45}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-weight:600;font-size:.95em}
:focus-visible{outline:2px solid var(--accent-400);outline-offset:2px;border-radius:var(--r-xs)}
::selection{background:rgba(33,230,193,.28);color:var(--text-100)}

/* ---------- App Shell ---------- */
.shell{position:relative;z-index:1}
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;
  flex-direction:column;
  padding:26px 18px 22px;
  background:rgba(11,20,36,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line-1);
  z-index:40;
  transition:transform var(--ease),width var(--ease);
}
.side-logo{display:flex;align-items:center;gap:10px;padding:4px 6px 0;margin-bottom:26px}
.logo-mark{
  flex:0 0 34px;
  width:34px;height:34px;
  border-radius:var(--r-xs);
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  transform:skewX(-12deg);
  box-shadow:0 0 18px rgba(33,230,193,.28);
  position:relative;
}
.logo-mark::after{
  content:"";
  position:absolute;inset:7px;
  border:2px solid rgba(6,11,20,.72);
  border-radius:2px;
  transform:skewX(0deg);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text b{color:var(--text-100);font-size:15px;letter-spacing:0}
.logo-text span{color:var(--text-500);font-size:12px;letter-spacing:.08em}
.side-nav{display:flex;flex-direction:column;gap:6px;flex:1}
.nav-label{font-size:12px;color:var(--text-500);padding:0 10px;margin-bottom:2px;letter-spacing:.1em}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:11px;
  min-height:46px;
  padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-300);
  font-size:15px;
  border-left:3px solid transparent;
}
.nav-item i{
  flex:0 0 18px;width:18px;height:18px;
  border:1.5px solid currentColor;
  border-radius:3px;
  opacity:.85;
  position:relative;
}
.nav-item i::after{content:"";position:absolute;left:3px;right:3px;top:6px;height:1.5px;background:currentColor;opacity:.6}
.nav-item span{white-space:nowrap}
.nav-item:hover{background:rgba(122,160,220,.08);color:var(--text-100)}
.nav-item.is-active{
  background:rgba(33,230,193,.08);
  border-left-color:var(--accent-400);
  color:var(--text-100);
}
.nav-item.is-active i{border-color:var(--accent-400);color:var(--accent-400);opacity:1}
.nav-item.is-active i::after{background:var(--accent-400)}
.side-foot{
  margin-top:20px;
  padding:14px;
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  background:var(--bg-800);
}
.side-foot p{font-size:13px;line-height:1.7;color:var(--text-500);margin-bottom:10px}

/* ---------- Topbar / Drawer (mobile) ---------- */
.topbar{
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  display:none;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:rgba(11,20,36,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-1);
  z-index:50;
}
.topbar .logo-text b{font-size:14px}
.topbar .logo-text span{display:none}
.menu-btn{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);
  color:var(--text-100);
  border:1px solid var(--line-1);
  transition:border-color var(--ease),background-color var(--ease);
}
.menu-btn:hover{border-color:var(--line-hot);background:rgba(33,230,193,.08)}
.menu-btn span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}
.menu-btn span::before{top:-6px}
.menu-btn span::after{top:6px}
.topbar-link{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:var(--r-sm);border:1px solid var(--line-1);color:var(--accent-400)}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(6,11,20,.72);
  opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);
  z-index:45;
}
.drawer-mask.open{opacity:1;visibility:visible}

/* ---------- Main ---------- */
.main{
  position:relative;
  z-index:1;
  margin-left:var(--sidebar-w);
  padding:44px 0 0;
}
.container{max-width:1240px;margin:0 auto;padding:0 32px}
.section{margin-top:96px}
.section:first-child{margin-top:0}
.section-head{margin-bottom:24px;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px}
.sec-desc{color:var(--text-500);font-size:14px;margin-top:8px;max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--accent-400);
  text-transform:uppercase;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent-400);display:block}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease);
  border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  color:#04121A;
  box-shadow:0 0 0 1px rgba(33,230,193,.3) inset,0 8px 24px rgba(20,201,168,.2);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--shadow-glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border-color:var(--line-2);
  color:var(--text-100);
}
.btn-ghost:hover{border-color:var(--line-hot);color:var(--accent-400)}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--accent-400);
  font-size:14px;font-weight:600;
  background:none;border:0;padding:0;
  min-height:44px;
}
.btn-text .arrow{transition:transform var(--ease)}
.btn-text:hover .arrow{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  border-radius:var(--r-lg);
  border:1px solid var(--line-1);
  overflow:hidden;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  min-height:520px;
  display:flex;
  align-items:center;
  box-shadow:var(--shadow-card);
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(6,11,20,.94) 0%,rgba(6,11,20,.74) 46%,rgba(6,11,20,.88) 100%);
}
.hero::after{
  content:"";
  position:absolute;
  top:-30%;left:-10%;
  width:65%;height:160%;
  background:linear-gradient(90deg,rgba(44,107,255,.22),rgba(33,230,193,.06),transparent);
  transform:rotate(12deg);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  width:100%;
  display:grid;
  grid-template-columns:8fr 4fr;
  gap:32px;
  align-items:end;
  padding:56px;
}
.hero-title{font-size:44px;line-height:1.15;color:var(--text-100);max-width:760px}
.hero-title em{font-style:normal;color:var(--accent-400)}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-300);max-width:600px}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.stat-bar{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--line-1);
  border:1px solid var(--line-1);
  border-radius:var(--r-lg);
  overflow:hidden;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  background-color:rgba(11,20,36,.6);
}
.stat-item{background:rgba(11,20,36,.55);padding:16px 18px}
.stat-num{color:var(--accent-400);font-size:26px;line-height:1.2;font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:-.01em}
.stat-num small{font-size:14px;color:var(--text-300);margin-left:2px;font-weight:600}
.stat-label{font-size:13px;color:var(--text-500);margin-top:4px}

/* ---------- Directory rows ---------- */
.toc-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 40px;
  border-top:1px solid var(--line-1);
}
.toc-row{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:56px;
  padding:6px 4px;
  border-bottom:1px solid var(--line-1);
  transition:transform var(--ease),color var(--ease);
}
.toc-row:hover{transform:translateX(4px)}
.toc-row .idx{font-variant-numeric:tabular-nums;font-weight:600;font-size:14px;color:var(--text-500);flex:0 0 28px}
.toc-row:hover .idx{color:var(--accent-400)}
.toc-row .ttl{color:var(--text-100);font-size:16px;font-weight:600;flex:1;min-width:0}
.toc-row .note{color:var(--text-500);font-size:13px;flex:0 0 auto;display:none}
.toc-row .arrow{color:var(--text-500);transition:transform var(--ease),color var(--ease)}
.toc-row:hover .arrow{color:var(--accent-400);transform:translateX(4px)}

/* ---------- Featured (5/7) ---------- */
.feature-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:start}
.card-lg{
  background:var(--bg-700);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  position:relative;
  display:block;
}
.card-lg::before,
.rec-card::before,
.rail-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-400));
  opacity:0;
  transition:opacity var(--ease);
}
.card-lg:hover,.rec-card:hover,.rail-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-2)}
.card-lg:hover::before,.rec-card:hover::before,.rail-card:hover::before{opacity:.6}
.card-lg .thumb{aspect-ratio:16/9;background:var(--bg-700);overflow:hidden}
.card-lg .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.card-body{padding:22px}
.card-fig{margin-top:12px}
.card-body h3{margin-top:12px}
.card-body p{margin-top:10px;font-size:14.5px;color:var(--text-300);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line-1);
  font-size:13px;color:var(--text-500);
}
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;line-height:1.4;
  padding:4px 10px;
  border-radius:var(--r-full);
  background:rgba(33,230,193,.12);
  color:var(--accent-400);
  white-space:nowrap;
}
.badge-blue{background:rgba(78,134,255,.14);color:var(--brand-400)}
.badge-amber{background:rgba(255,176,32,.14);color:var(--amber-400)}

.mini-list{display:flex;flex-direction:column;gap:16px}
.mini-item{
  display:block;
  padding:20px 22px;
  background:var(--bg-800);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  transition:transform var(--ease),border-color var(--ease),background-color var(--ease);
}
.mini-item:hover{transform:translateY(-4px);border-color:var(--line-2);background:var(--bg-700)}
.mini-head{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-500)}
.mini-item h3{margin-top:12px;font-size:19px}
.mini-item p{margin-top:8px;font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- News list (CMS) ---------- */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.news-card{
  display:grid;
  grid-template-columns:132px 1fr;
  gap:16px;
  padding:16px;
  background:var(--bg-700);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-hot);box-shadow:var(--shadow-hover)}
.news-thumb{aspect-ratio:16/11;border-radius:var(--r-sm);overflow:hidden;background:var(--bg-600);border:1px solid var(--line-1)}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.news-body{min-width:0;display:flex;flex-direction:column}
.news-body h3{font-size:17px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{margin-top:8px;font-size:14px;color:var(--text-300);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{
  margin-top:auto;padding-top:12px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-500);
  font-variant-numeric:tabular-nums;
}
.empty-state{
  grid-column:1/-1;
  min-height:200px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--bg-800);
  border:1px dashed var(--line-2);
  border-radius:var(--r-md);
  color:var(--text-500);
  font-size:14px;
  text-align:center;
  padding:24px;
}
.empty-state svg{width:38px;height:38px;color:var(--text-500)}

/* ---------- Rail (horizontal scroll) ---------- */
.rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  padding-bottom:14px;
  scroll-snap-type:x mandatory;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--bg-800);border-radius:var(--r-full)}
.rail::-webkit-scrollbar-thumb{background:var(--bg-600);border-radius:var(--r-full)}
.rail-card{
  position:relative;
  flex:0 0 300px;
  scroll-snap-align:start;
  padding:22px;
  background:var(--bg-700);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rail-card .idx{font-size:13px;color:var(--amber-400);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.08em}
.rail-card h3{margin-top:14px;font-size:18px}
.rail-card p{margin-top:8px;font-size:14px;color:var(--text-300);min-height:66px}
.progress{height:5px;background:var(--bg-600);border-radius:var(--r-full);overflow:hidden;margin-top:16px}
.progress i{display:block;height:100%;border-radius:var(--r-full);background:linear-gradient(90deg,var(--brand-500),var(--accent-400))}
.rail-card .pct{margin-top:10px;font-size:13px;color:var(--text-500);font-variant-numeric:tabular-nums}

/* ---------- Recommend ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rec-card{
  position:relative;
  display:block;
  background:var(--bg-700);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rec-card .thumb{aspect-ratio:16/9;background:var(--bg-600);overflow:hidden}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.rec-card .rec-body{padding:18px}
.rec-card h3{font-size:16px;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-card p{margin-top:8px;font-size:13.5px;color:var(--text-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- FAQ ---------- */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;align-items:start}
.faq details{
  border-bottom:1px solid var(--line-1);
  border-left:2px solid transparent;
  padding:0 4px;
  transition:border-color var(--ease),background-color var(--ease);
}
.faq details[open]{border-left-color:var(--accent-400);background:rgba(33,230,193,.04)}
.faq summary{
  list-style:none;
  cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 6px 20px 14px;
  font-size:17px;font-weight:700;color:var(--text-100);
  line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .sign{
  flex:0 0 26px;width:26px;height:26px;
  position:relative;
  border:1px solid var(--line-2);
  border-radius:var(--r-xs);
  transition:transform var(--ease),border-color var(--ease);
}
.faq summary .sign::before,.faq summary .sign::after{
  content:"";position:absolute;background:var(--accent-400);
}
.faq summary .sign::before{left:6px;right:6px;top:50%;height:1.5px;transform:translateY(-50%)}
.faq summary .sign::after{top:6px;bottom:6px;left:50%;width:1.5px;transform:translateX(-50%);transition:opacity var(--ease)}
.faq details[open] summary .sign{transform:rotate(180deg);border-color:var(--line-hot)}
.faq details[open] summary .sign::after{opacity:0}
.faq .answer{padding:0 14px 22px;font-size:15px;line-height:1.8;color:var(--text-300)}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  border-radius:var(--r-lg);
  border:1px solid var(--line-hot);
  background:linear-gradient(135deg,rgba(44,107,255,.16),rgba(20,201,168,.14));
  padding:48px 56px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:32px;
  align-items:center;
  overflow:hidden;
}
.cta-panel h2{font-size:28px}
.cta-panel p{margin-top:12px;font-size:15px;color:var(--text-300);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-form{margin-top:20px;display:flex;gap:12px;flex-wrap:wrap;max-width:520px}
.cta-form input{
  flex:1 1 240px;
  min-height:46px;
  padding:12px 14px;
  background:var(--bg-800);
  border:1px solid var(--line-1);
  border-radius:var(--r-sm);
  color:var(--text-100);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.cta-form input::placeholder{color:var(--text-500)}
.cta-form input:focus{outline:none;border-color:var(--line-hot);box-shadow:0 0 0 3px rgba(33,230,193,.12)}
.form-note{font-size:13px;color:var(--text-500);margin-top:10px}

/* ---------- Footer ---------- */
.footer{
  margin-top:96px;
  border-top:1px solid var(--line-1);
  background:var(--bg-800);
}
.foot-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.4fr;
  gap:32px;
  padding:56px 0 40px;
}
.foot-col h4{font-size:14px;color:var(--text-100);margin-bottom:16px}
.foot-col p{font-size:14px;color:var(--text-500);line-height:1.8}
.foot-col ul li{margin-bottom:10px}
.foot-col ul a{font-size:14px;color:var(--text-300)}
.foot-col ul a:hover{color:var(--accent-400)}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-bottom{
  border-top:1px solid var(--line-1);
  padding:20px 0 34px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-500);
}
.foot-bottom a{color:var(--text-500)}
.foot-bottom a:hover{color:var(--accent-400)}

/* ---------- Responsive ---------- */
@media (max-width:1439px){
  :root{--sidebar-w:240px}
}
@media (max-width:1279px){
  :root{--sidebar-w:76px}
  .sidebar{padding:22px 12px}
  .side-logo{justify-content:center;margin-bottom:20px}
  .logo-text{display:none}
  .nav-label{display:none}
  .nav-item{justify-content:center;padding:0;border-left-width:3px}
  .nav-item span{display:none}
  .side-foot{padding:10px}
  .side-foot p,.side-foot .btn span{display:none}
  .hero-inner{padding:44px}
}
@media (max-width:1023px){
  :root{--sidebar-w:0px}
  .topbar{display:flex}
  .sidebar{
    width:280px;
    padding:24px 18px;
    transform:translateX(-100%);
    background:rgba(11,20,36,.96);
    z-index:60;
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar .logo-text{display:flex}
  .sidebar .nav-label{display:block}
  .sidebar .nav-item{justify-content:flex-start;padding:0 12px}
  .sidebar .nav-item span{display:inline}
  .sidebar .side-foot p,.sidebar .side-foot .btn span{display:block}
  .main{margin-left:0;padding-top:56px}
  .hero{min-height:440px}
  .hero-inner{grid-template-columns:1fr;gap:28px;padding:36px 28px;align-items:start}
  .stat-bar{grid-template-columns:repeat(3,1fr);width:100%}
  .section{margin-top:72px}
  .feature-grid{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-panel{grid-template-columns:1fr;padding:36px 32px}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.8}
  h1{font-size:30px}
  h2{font-size:23px}
  h3{font-size:18px}
  .container{padding:0 16px}
  .hero{min-height:380px;border-radius:var(--r-md)}
  .hero-inner{padding:28px 20px}
  .hero-title{font-size:30px}
  .hero-sub{font-size:15.5px;margin-top:14px}
  .hero-actions{margin-top:22px}
  .hero-actions .btn{flex:1 1 100%}
  .stat-bar{grid-template-columns:repeat(2,1fr)}
  .stat-item{padding:14px}
  .stat-num{font-size:22px}
  .toc-list{grid-template-columns:1fr;gap:0}
  .toc-row .note{display:none}
  .news-list{grid-template-columns:1fr}
  .news-card{grid-template-columns:104px 1fr;padding:14px;gap:14px}
  .rec-grid{grid-template-columns:1fr}
  .faq{grid-template-columns:1fr}
  .cta-panel{padding:28px 20px;border-radius:var(--r-md)}
  .cta-actions .btn,.cta-form .btn{flex:1 1 100%}
  .foot-grid{grid-template-columns:1fr;padding:40px 0 28px}
  .section{margin-top:56px}
  .rail-card{flex:0 0 82%}
}
@media (max-width:480px){
  .toc-row .note{display:none}
  .card-body{padding:18px}
  .mini-item{padding:18px}
  .news-card{grid-template-columns:1fr}
  .news-thumb{aspect-ratio:16/9}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .card-lg:hover,.rec-card:hover,.rail-card:hover,.news-card:hover,.mini-item:hover{transform:none}
  .toc-row:hover{transform:none}
}

/* roulang page: article */
:root{
  --bg-900:#060B14;
  --bg-800:#0B1424;
  --bg-700:#101C31;
  --bg-600:#16243C;
  --line-1:rgba(122,160,220,.14);
  --line-2:rgba(122,160,220,.28);
  --line-hot:rgba(33,230,193,.55);
  --brand-600:#1F55D6;
  --brand-500:#2C6BFF;
  --brand-400:#4E86FF;
  --brand-glow:rgba(44,107,255,.45);
  --accent-500:#14C9A8;
  --accent-400:#21E6C1;
  --amber-400:#FFB020;
  --danger-400:#FF6B6B;
  --text-100:#EAF1FF;
  --text-300:#A9B8D4;
  --text-500:#6C7C99;
  --r-xs:4px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-full:999px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ease:cubic-bezier(.4,0,.2,1);
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset,0 12px 28px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px var(--line-2);
  --side-w:260px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-300);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,160,220,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,220,.035) 1px,transparent 1px);
  background-size:40px 40px;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(120deg,rgba(44,107,255,.10),transparent 44%,rgba(33,230,193,.06));
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--text-100);font-weight:700;letter-spacing:-.01em}
em,i{font-style:normal}
.num{font-variant-numeric:tabular-nums;font-weight:600;font-size:.95em}
:focus-visible{outline:2px solid var(--accent-400);outline-offset:2px;border-radius:var(--r-xs)}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* ---------- App Shell ---------- */
.app{position:relative;z-index:1;min-height:100vh}
.side-nav{
  position:fixed;left:0;top:0;bottom:0;width:var(--side-w);z-index:60;
  display:flex;flex-direction:column;gap:4px;
  padding:22px 16px 18px;overflow-y:auto;
  background:rgba(11,20,36,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line-1);
  transition:transform 260ms var(--ease);
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px 20px}
.logo-mark{
  position:relative;flex:0 0 34px;width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-600),var(--accent-500));
  box-shadow:0 0 0 1px rgba(33,230,193,.30) inset,0 8px 20px rgba(20,201,168,.18);
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;border:2px solid rgba(6,11,20,.72);
  border-radius:2px;transform:skewX(-14deg);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.brand-text b{color:var(--text-100);font-size:15px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.brand-text em{color:var(--text-500);font-size:11px;letter-spacing:.06em}
.nav-label{
  padding:0 10px 8px;color:var(--text-500);font-size:11px;letter-spacing:.16em;
}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:10px 12px;border-radius:var(--r-sm);
  color:var(--text-300);font-size:14px;
  transition:background 180ms var(--ease),color 180ms var(--ease);
}
.nav-item i{
  flex:0 0 16px;width:16px;height:16px;border-radius:5px;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  opacity:.5;transition:opacity 180ms var(--ease),transform 180ms var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--accent-400);
  transition:height 180ms var(--ease);
}
.nav-item:hover{background:rgba(122,160,220,.08);color:var(--text-100)}
.nav-item:hover i{opacity:.85}
.nav-item.is-active{background:rgba(33,230,193,.08);color:var(--text-100)}
.nav-item.is-active::before{height:22px}
.nav-item.is-active i{opacity:1;transform:scale(1.05)}
.nav-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line-1)}
.nav-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;border-radius:var(--r-sm);border:1px solid var(--line-2);
  color:var(--text-100);font-size:13px;font-weight:600;
  transition:border-color 180ms var(--ease),color 180ms var(--ease),background 180ms var(--ease);
}
.nav-cta:hover{border-color:var(--line-hot);color:var(--accent-400);background:rgba(33,230,193,.06)}
.nav-scrim{
  position:fixed;inset:0;z-index:55;background:rgba(6,11,20,.72);
  opacity:0;visibility:hidden;transition:opacity 200ms var(--ease),visibility 200ms;
}
body.nav-open .nav-scrim{opacity:1;visibility:visible}
.topbar{
  display:none;position:fixed;left:0;right:0;top:0;height:56px;z-index:58;
  align-items:center;gap:12px;padding:0 16px;
  background:rgba(11,20,36,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-1);
}
.nav-toggle{
  width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;
  align-items:center;gap:4px;border-radius:var(--r-sm);
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-100);transition:transform 200ms var(--ease)}
.nav-toggle:hover{background:rgba(122,160,220,.08)}
.topbar-brand{flex:1;color:var(--text-100);font-size:15px;font-weight:700;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-action{color:var(--accent-400);font-size:13px;font-weight:600;padding:8px}

.main{position:relative;margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}
.page-wrap{flex:1;padding:36px 0 0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:filter 180ms var(--ease),transform 180ms var(--ease),
             border-color 180ms var(--ease),color 180ms var(--ease),
             background 180ms var(--ease),box-shadow 180ms var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  color:#04121A;
  box-shadow:0 0 0 1px rgba(33,230,193,.35) inset,0 10px 26px rgba(20,201,168,.20);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(33,230,193,.5) inset,0 0 22px rgba(33,230,193,.28)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border:1px solid var(--line-2);color:var(--text-100)}
.btn-ghost:hover{border-color:var(--line-hot);color:var(--accent-400)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--accent-400);
  font-size:14px;font-weight:600;min-height:44px;
}
.btn-text .arrow{transition:transform 180ms var(--ease)}
.btn-text:hover .arrow{transform:translateX(4px)}

/* ---------- 面包屑 / 标签 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-500);margin-bottom:20px}
.breadcrumb a{color:var(--text-500);transition:color 180ms var(--ease)}
.breadcrumb a:hover{color:var(--accent-400)}
.breadcrumb .crumb-current{color:var(--text-100)}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-full);
  font-size:12px;font-weight:600;line-height:1.4;
}
.pill-accent{background:rgba(33,230,193,.12);color:var(--accent-400)}
.pill-brand{background:rgba(78,134,255,.12);color:var(--brand-400)}
.pill-ghost{background:rgba(122,160,220,.10);color:var(--text-300)}

/* ---------- 文章头部 ---------- */
.page-head{margin-bottom:32px;max-width:900px}
.head-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.article-title{font-size:44px;line-height:1.15;letter-spacing:-.01em;margin-bottom:16px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:14px;color:var(--text-500)}
.meta-row a{color:var(--text-300);border-bottom:1px dashed var(--line-2);transition:color 180ms var(--ease),border-color 180ms var(--ease)}
.meta-row a:hover{color:var(--accent-400);border-color:var(--line-hot)}
.meta-row .sep{width:1px;height:12px;background:var(--line-2);display:inline-block}

/* ---------- 文章布局 ---------- */
.article-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start;padding-bottom:72px}
.article-main{
  position:relative;background:var(--bg-800);border:1px solid var(--line-1);
  border-radius:var(--r-md);padding:32px;box-shadow:var(--shadow-card);
  min-width:0;
}
.article-main::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;border-radius:var(--r-md) var(--r-md) 0 0;
  background:linear-gradient(90deg,rgba(44,107,255,.6),rgba(33,230,193,.6));
}
.article-cover{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);
  border:1px solid var(--line-1);background:var(--bg-700);margin-bottom:24px;
}
.article-body{max-width:760px;font-size:16px;line-height:1.9;color:var(--text-300)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-left:14px;
  font-size:24px;line-height:1.4;scroll-margin-top:90px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:2px;background:var(--accent-400);
}
.article-body h3{margin:28px 0 12px;font-size:17px;font-weight:700;color:var(--text-100);line-height:1.45}
.article-body h4{margin:22px 0 10px;font-size:16px;font-weight:700;color:var(--text-100)}
.article-body ul{margin:0 0 20px}
.article-body ul > li{position:relative;padding-left:20px;margin-bottom:10px;line-height:1.85}
.article-body ul > li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;
  border-radius:2px;background:var(--accent-400);opacity:.85;
}
.article-body ol{margin:0 0 20px;padding-left:22px;list-style:decimal}
.article-body ol > li{margin-bottom:10px;line-height:1.85}
.article-body ol > li::marker{color:var(--accent-400);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--bg-800);
  border-left:3px solid var(--brand-400);border-radius:var(--r-sm);
  color:var(--text-300);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  width:100%;border-radius:var(--r-md);border:1px solid var(--line-1);
  background:var(--bg-700);margin:24px 0 8px;
}
.article-body figure{margin:24px 0}
.article-body figcaption{
  margin-top:8px;text-align:center;font-size:13px;color:var(--text-500);
}
.article-body a{color:var(--accent-400);border-bottom:1px dashed rgba(33,230,193,.45);transition:border-color 180ms var(--ease)}
.article-body a:hover{border-bottom-style:solid}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body thead th{
  background:var(--bg-700);color:var(--text-100);text-align:left;font-weight:600;
  padding:12px 14px;border-bottom:1px solid var(--line-1);
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--line-1)}
.article-body tbody tr:hover{background:rgba(122,160,220,.05)}
.article-body code{
  background:var(--bg-700);border:1px solid var(--line-1);border-radius:var(--r-xs);
  padding:2px 6px;font-size:14px;color:var(--accent-400);
}
.article-body hr{border:0;border-top:1px solid var(--line-1);margin:32px 0}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line-1)}
.share-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:20px;padding:14px 16px;border-radius:var(--r-sm);
  background:var(--bg-800);border:1px solid var(--line-1);
}
.share-label{font-size:13px;color:var(--text-500);letter-spacing:.06em}
.share-actions{display:flex;flex-wrap:wrap;gap:8px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  min-height:40px;min-width:40px;padding:0 14px;
  border-radius:var(--r-sm);border:1px solid var(--line-2);
  color:var(--text-300);font-size:13px;font-weight:600;
  transition:border-color 180ms var(--ease),color 180ms var(--ease),
             background 180ms var(--ease),transform 180ms var(--ease);
}
.icon-btn:hover{border-color:var(--line-hot);color:var(--accent-400)}
.icon-btn:active{transform:translateY(1px)}
.icon-btn[aria-pressed="true"]{
  background:rgba(33,230,193,.14);border-color:var(--line-hot);color:var(--accent-400);
}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:24px;display:flex;flex-direction:column;gap:18px;min-width:0}
.side-card{
  background:var(--bg-700);border:1px solid var(--line-1);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--shadow-card);
}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;color:var(--text-100);margin-bottom:14px;
  letter-spacing:.04em;
}
.side-title::before{
  content:"";width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-400));
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:9px 10px;border-radius:var(--r-xs);
  font-size:14px;color:var(--text-300);line-height:1.5;
  border-left:2px solid transparent;
  transition:color 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease);
}
.toc-list a:hover{background:rgba(122,160,220,.08);color:var(--text-100)}
.toc-list a.is-current{
  color:var(--accent-400);border-left-color:var(--accent-400);
  background:rgba(33,230,193,.07);
}
.side-note{font-size:13px;line-height:1.75;color:var(--text-500);margin:0 0 14px}
.side-card .btn{width:100%}
.side-facts{display:flex;flex-direction:column;gap:12px}
.side-fact{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line-1)}
.side-fact:last-child{border-bottom:0;padding-bottom:0}
.side-fact span{font-size:13px;color:var(--text-500)}
.side-fact b{color:var(--accent-400);font-size:18px;font-variant-numeric:tabular-nums}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 72px}
.section-head{margin-bottom:24px}
.section-head h2{font-size:30px;line-height:1.25;margin-bottom:8px}
.section-head p{margin:0;font-size:14px;color:var(--text-500)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-800);border:1px solid var(--line-1);border-radius:var(--r-md);
  box-shadow:var(--shadow-card);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.card::after{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;opacity:0;
  background:linear-gradient(90deg,rgba(44,107,255,.6),rgba(33,230,193,.6));
  transition:opacity 180ms var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-2)}
.card:hover::after{opacity:1}
.card-thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-700)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{
  margin:0;font-size:14px;color:var(--text-300);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--text-500)}
.card-foot a{color:var(--accent-400);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.card-foot a .arrow{transition:transform 180ms var(--ease)}
.card:hover .card-foot a .arrow{transform:translateX(3px)}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;margin-bottom:72px;
  padding:40px 36px;border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(44,107,255,.14),rgba(20,201,168,.14));
  border:1px solid var(--line-hot);
}
.cta-panel::after{
  content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(33,230,193,.22),transparent 68%);
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.cta-inner h2{font-size:30px;line-height:1.25;margin-bottom:10px}
.cta-inner p{margin:0;font-size:15px;color:var(--text-300);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 空态 ---------- */
.empty-state{
  min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:32px;
  background:var(--bg-800);border:1px dashed var(--line-2);border-radius:var(--r-md);
}
.empty-icon{
  width:40px;height:40px;border-radius:var(--r-sm);border:2px solid var(--line-2);
  position:relative;display:block;
}
.empty-icon::after{content:"";position:absolute;left:50%;top:50%;width:16px;height:2px;background:var(--line-2);transform:translate(-50%,-50%)}
.empty-state p{margin:0;color:var(--text-300);font-size:15px}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:auto;border-top:1px solid var(--line-1);
  background:rgba(11,20,36,.6);padding:56px 0 0;
}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-col p{margin:0 0 10px;font-size:14px;color:var(--text-300);line-height:1.8}
.foot-col h4{font-size:14px;color:var(--text-100);margin-bottom:16px;letter-spacing:.04em}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col li a{font-size:14px;color:var(--text-300);transition:color 180ms var(--ease)}
.foot-col li a:hover{color:var(--accent-400)}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 0 24px;border-top:1px solid var(--line-1);
  font-size:13px;color:var(--text-500);
}
.foot-bottom a{color:var(--text-300);transition:color 180ms var(--ease)}
.foot-bottom a:hover{color:var(--accent-400)}

/* ---------- 响应式 ---------- */
@media (min-width:1280px) and (max-width:1439px){
  :root{--side-w:240px}
}
@media (min-width:1024px) and (max-width:1279px){
  :root{--side-w:76px}
  .side-nav{padding:20px 12px;align-items:center}
  .brand{padding:0 0 18px}
  .brand-text{display:none}
  .nav-label{display:none}
  .nav-item{justify-content:center;width:52px;padding:0}
  .nav-item span{display:none}
  .nav-foot{width:100%}
  .nav-cta{padding:0;font-size:0}
  .nav-cta::after{content:"订阅";font-size:12px}
}
@media (max-width:1023px){
  .side-nav{transform:translateX(-100%);width:280px;box-shadow:0 0 60px rgba(0,0,0,.6)}
  body.nav-open .side-nav{transform:translateX(0)}
  .main{margin-left:0;padding-top:56px}
  .topbar{display:flex}
  .container{padding:0 24px}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:24px;padding-bottom:56px}
  .article-aside{position:static}
  .page-head{max-width:none}
  .article-title{font-size:32px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.8}
  .container{padding:0 16px}
  .page-wrap{padding:24px 0 0}
  .article-title{font-size:30px}
  .article-main{padding:22px 18px}
  .article-body h2{font-size:20px;margin-top:32px}
  .section-head h2,.cta-inner h2{font-size:23px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .cta-panel{padding:28px 20px;margin-bottom:56px}
  .related{padding-bottom:56px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .share-bar{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  .article-title{font-size:26px}
  .meta-row{gap:8px}
  .meta-row .sep{display:none}
  .btn{width:100%}
  .btn-text{width:auto}
  .cta-actions,.share-actions{width:100%}
  .icon-btn{flex:1}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg-900:#060B14;--bg-800:#0B1424;--bg-700:#101C31;--bg-600:#16243C;
  --line-1:rgba(122,160,220,.14);--line-2:rgba(122,160,220,.28);--line-hot:rgba(33,230,193,.55);
  --brand-600:#1F55D6;--brand-500:#2C6BFF;--brand-400:#4E86FF;--brand-glow:rgba(44,107,255,.45);
  --accent-500:#14C9A8;--accent-400:#21E6C1;
  --amber-400:#FFB020;--danger-400:#FF6B6B;
  --text-100:#EAF1FF;--text-300:#A9B8D4;--text-500:#6C7C99;
  --r-xs:4px;--r-sm:10px;--r-md:14px;--r-lg:18px;--r-full:999px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --sh-card:0 1px 0 rgba(255,255,255,.04) inset,0 12px 28px rgba(0,0,0,.45);
  --sh-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px var(--line-2);
  --t:180ms cubic-bezier(.4,0,.2,1);
  --side:260px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;background-color:var(--bg-900);color:var(--text-300);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  background-image:
    linear-gradient(120deg,rgba(44,107,255,.08),transparent 46%),
    linear-gradient(rgba(122,160,220,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,220,.035) 1px,transparent 1px);
  background-size:auto,40px 40px,40px 40px;
  background-attachment:fixed;
}
h1,h2,h3,h4{color:var(--text-100);margin:0;font-weight:700;letter-spacing:-.01em}
h1{font-size:44px;line-height:1.15}
h2{font-size:30px;line-height:1.25}
h3{font-size:20px;line-height:1.4}
h4{font-size:17px;line-height:1.45}
p{margin:0 0 14px}
a{color:inherit;text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t)}
img{display:block;max-width:100%;border:0}
ul{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--accent-400);outline-offset:2px;border-radius:var(--r-xs)}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums;font-weight:600;font-size:.95em}

/* ---------- 左侧导航 ---------- */
.side-nav{
  position:fixed;top:0;bottom:0;left:0;width:var(--side);z-index:60;
  display:flex;flex-direction:column;gap:6px;padding:24px 16px 20px;
  background:rgba(11,20,36,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line-1);
}
.logo{display:flex;align-items:center;gap:10px;padding:6px 10px 18px;color:var(--text-100);font-weight:700;font-size:16px;letter-spacing:-.01em}
.logo-mark{
  display:block;width:34px;height:34px;flex:0 0 34px;border-radius:6px;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  box-shadow:0 0 18px var(--brand-glow);
}
.logo-text{white-space:nowrap}
.nav-label{font-size:12px;color:var(--text-500);letter-spacing:.14em;padding:12px 12px 4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;min-height:44px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--text-300);font-size:14.5px;line-height:1.4;
}
.nav-item i{width:8px;height:8px;flex:0 0 8px;border-radius:3px;background:var(--line-2);transition:background var(--t)}
.nav-item span{white-space:nowrap}
.nav-item:hover{background:rgba(122,160,220,.08);color:var(--text-100)}
.nav-item.is-active{background:rgba(33,230,193,.08);color:var(--text-100);font-weight:600}
.nav-item.is-active i{background:var(--accent-400)}
.nav-item.is-active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--accent-400)}
.side-foot{margin-top:auto;padding:16px 4px 0;border-top:1px solid var(--line-1)}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;
  border:1px solid var(--line-2);border-radius:var(--r-sm);color:var(--text-300);font-size:14px;
}
.side-cta:hover{border-color:var(--line-hot);color:var(--accent-400);background:rgba(33,230,193,.06)}
.side-note{font-size:12px;color:var(--text-500);line-height:1.6;padding:10px 6px 0}

/* ---------- 顶部栏 / 抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;align-items:center;gap:10px;
  padding:0 12px;background:rgba(11,20,36,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-1);
}
.topbar .logo{padding:0;font-size:15px;flex:1;min-width:0}
.topbar .logo .logo-mark{width:28px;height:28px;flex:0 0 28px}
.topbar .logo .logo-text{overflow:hidden;text-overflow:ellipsis}
.icon-btn{
  width:44px;height:44px;flex:0 0 44px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line-1);border-radius:var(--r-sm);cursor:pointer;
  transition:border-color var(--t),background var(--t);
}
.icon-btn:hover{border-color:var(--line-hot);background:rgba(33,230,193,.07)}
.icon-btn .bars{display:block;width:18px;height:2px;background:var(--text-100);border-radius:2px;position:relative}
.icon-btn .bars::before,.icon-btn .bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-100);border-radius:2px}
.icon-btn .bars::before{top:-6px}
.icon-btn .bars::after{top:6px}
.drawer{
  position:fixed;top:0;bottom:0;left:0;width:280px;z-index:90;padding:20px 16px;
  display:flex;flex-direction:column;gap:6px;transform:translateX(-100%);
  background:rgba(11,20,36,.96);backdrop-filter:blur(14px);border-right:1px solid var(--line-1);
  transition:transform var(--t);overflow-y:auto;
}
.drawer.is-open{transform:none}
.drawer-mask{position:fixed;inset:0;z-index:80;background:rgba(6,11,20,.72);opacity:0;visibility:hidden;transition:opacity var(--t)}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer-close{position:absolute;top:14px;right:14px;width:40px;height:40px;border:1px solid var(--line-1);border-radius:var(--r-sm);background:transparent;cursor:pointer;color:var(--text-300);font-size:18px;line-height:1}
.drawer-close:hover{border-color:var(--line-hot);color:var(--accent-400)}

/* ---------- 主内容 ---------- */
.main{margin-left:var(--side);min-height:100vh;display:flex;flex-direction:column}
.section{padding:72px 0}
.section+.section{padding-top:0}
.section-head{margin-bottom:24px;max-width:760px}
.section-head p{color:var(--text-300);margin-top:10px}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-full);
  font-size:12px;font-weight:600;letter-spacing:.04em;background:rgba(33,230,193,.12);color:var(--accent-400);
}
.rule{height:1px;background:var(--line-1);border:0;margin:0}

/* 面包屑 */
.crumb{font-size:14px;color:var(--text-500);display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.crumb a:hover{color:var(--accent-400)}
.crumb .sep{color:var(--text-500);opacity:.6}
.crumb .now{color:var(--text-100)}

/* 页面头 */
.page-head{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line-1);
  background-image:linear-gradient(180deg,rgba(6,11,20,.68),rgba(6,11,20,.94)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(120deg,rgba(44,107,255,.28),transparent 55%);
  opacity:.5;
}
.page-head .container{position:relative;z-index:1}
.head-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center;min-height:270px;padding:36px 0}
.head-copy h1{margin:6px 0 12px;font-size:clamp(30px,3.4vw,42px)}
.head-copy p{max-width:640px;color:var(--text-300);font-size:16px}
.stat-card{
  border:1px solid var(--line-2);border-radius:var(--r-lg);padding:22px 24px;
  background:rgba(11,20,36,.72);backdrop-filter:blur(14px);box-shadow:var(--sh-card);
}
.stat-card .stat-title{font-size:13px;color:var(--text-500);letter-spacing:.08em;margin-bottom:14px}
.stat-row{display:flex;gap:28px;flex-wrap:wrap}
.stat-item .stat-num{font-size:30px;color:var(--accent-400);line-height:1.2}
.stat-item .stat-num.blue{color:var(--brand-400)}
.stat-item .stat-cap{font-size:13px;color:var(--text-500);line-height:1.5;margin-top:4px}

/* 12 列栅格 */
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.col-8{grid-column:span 8;min-width:0}
.col-4{grid-column:span 4;min-width:0}

/* 条目 */
.entry-group{margin-bottom:40px}
.entry-group h2{font-size:24px;margin-bottom:6px}
.entry-group .group-sub{color:var(--text-500);font-size:14px;margin-bottom:12px}
.entry{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--line-1);
}
.entry:last-child{border-bottom:0}
.entry-media{
  position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line-1);
  background:var(--bg-700);
}
.entry-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--t)}
.entry:hover .entry-media img{transform:scale(1.04)}
.entry--flip .entry-media{order:2}
.entry h3{margin-bottom:10px}
.entry .entry-tag{
  display:inline-block;margin-bottom:10px;padding:4px 10px;border-radius:var(--r-full);
  font-size:12px;font-weight:600;background:rgba(33,230,193,.12);color:var(--accent-400);
}
.entry .entry-meta{font-size:14px;color:var(--text-500);display:flex;gap:14px;flex-wrap:wrap;margin-top:12px}
.entry p{margin-bottom:0;font-size:15.5px}

/* 侧边目录 */
.toc{position:sticky;top:28px;border:1px solid var(--line-1);border-radius:var(--r-md);background:var(--bg-800);padding:18px 18px 12px;box-shadow:var(--sh-card)}
.toc h4{font-size:14px;color:var(--text-100);margin-bottom:10px}
.toc ul li{border-top:1px solid var(--line-1)}
.toc ul li:first-child{border-top:0}
.toc a{
  display:block;padding:11px 10px;font-size:14px;color:var(--text-300);
  border-left:2px solid transparent;border-radius:0 var(--r-sm) var(--r-sm) 0;
  transition:color var(--t),border-color var(--t),background var(--t),transform var(--t);
}
.toc a:hover{background:rgba(122,160,220,.07);color:var(--text-100);transform:translateX(4px)}
.toc a.is-current{color:var(--accent-400);border-left-color:var(--accent-400);background:rgba(33,230,193,.06)}
.toc .toc-note{margin-top:12px;padding-top:12px;border-top:1px solid var(--line-1);font-size:12.5px;color:var(--text-500);line-height:1.65}

/* 要点矩阵 */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line-1)}
.matrix-item{padding:22px;border-bottom:1px solid var(--line-1);border-right:1px solid var(--line-1);transition:background var(--t)}
.matrix-item:nth-child(3n){border-right:0}
.matrix-item:hover{background:rgba(122,160,220,.05)}
.matrix-item h4{font-size:17px;margin-bottom:8px}
.matrix-item h4::before{content:"";display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--accent-400);margin-right:8px;vertical-align:middle}
.matrix-item p{font-size:14.5px;color:var(--text-300);margin:0}

/* FAQ */
.faq{border-top:1px solid var(--line-1)}
.faq details{border-bottom:1px solid var(--line-1);padding:4px 0}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px 18px 0;font-size:17px;font-weight:600;color:var(--text-100);line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .sign{position:relative;width:20px;height:20px;flex:0 0 20px;border:1px solid var(--line-2);border-radius:var(--r-xs);transition:transform var(--t),border-color var(--t)}
.faq summary .sign::before,.faq summary .sign::after{content:"";position:absolute;top:50%;left:50%;background:var(--accent-400);transform:translate(-50%,-50%)}
.faq summary .sign::before{width:10px;height:1.6px}
.faq summary .sign::after{width:1.6px;height:10px;transition:opacity var(--t)}
.faq details[open] summary .sign{transform:rotate(180deg);border-color:var(--line-hot)}
.faq details[open] summary .sign::after{opacity:0}
.faq .answer{padding:0 0 20px;border-left:2px solid var(--accent-400);padding-left:16px;margin-left:2px}
.faq .answer p{font-size:15px;line-height:1.8;color:var(--text-300);margin:0}

/* 相关栏目 */
.related-links{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.link-block{
  display:block;border:1px solid var(--line-2);border-radius:var(--r-lg);padding:28px;
  background:var(--bg-700);box-shadow:var(--sh-card);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.link-block:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-hot)}
.link-block .lb-tag{font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--accent-400);background:rgba(33,230,193,.12);padding:4px 10px;border-radius:var(--r-full);display:inline-block;margin-bottom:14px}
.link-block .lb-tag.blue{color:var(--brand-400);background:rgba(44,107,255,.14)}
.link-block h3{font-size:22px;margin-bottom:10px}
.link-block p{font-size:14.5px;margin-bottom:16px;color:var(--text-300)}
.link-block .arrow{font-size:14px;color:var(--accent-400);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.link-block:hover .arrow span{transform:translateX(4px)}
.link-block .arrow span{display:inline-block;transition:transform var(--t)}

/* CTA */
.cta-panel{
  border:1px solid var(--line-hot);border-radius:var(--r-lg);padding:36px;
  background-image:linear-gradient(135deg,rgba(44,107,255,.16),rgba(33,230,193,.14));
  background-color:var(--bg-800);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-panel h2{font-size:26px;margin-bottom:8px}
.cta-panel p{margin:0;color:var(--text-300);max-width:64ch}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;
  border-radius:var(--r-sm);font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t),color var(--t),background var(--t),filter var(--t);
}
.btn-primary{background:linear-gradient(135deg,var(--brand-500),var(--accent-500));color:var(--bg-900);box-shadow:0 0 0 1px rgba(33,230,193,.45) inset,0 0 22px rgba(33,230,193,.28)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(33,230,193,.6) inset,0 6px 28px rgba(33,230,193,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text-300)}
.btn-ghost:hover{border-color:var(--line-hot);color:var(--accent-400);background:rgba(33,230,193,.06)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-loading{opacity:.6;cursor:not-allowed;filter:grayscale(.2)}

/* 订阅表单 */
.subscribe{display:grid;grid-template-columns:6fr 6fr;gap:32px;align-items:center;border:1px solid var(--line-1);border-radius:var(--r-lg);background:var(--bg-800);padding:32px;box-shadow:var(--sh-card)}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;color:var(--text-100);margin-bottom:8px}
.field input{
  width:100%;padding:12px 14px;background:var(--bg-900);border:1px solid var(--line-1);
  border-radius:var(--r-sm);color:var(--text-100);transition:border-color var(--t),box-shadow var(--t);
}
.field input::placeholder{color:var(--text-500)}
.field input:focus{border-color:var(--line-hot);box-shadow:0 0 0 3px rgba(33,230,193,.12);outline:none}
.form-hint{font-size:13px;color:var(--text-500);margin-top:10px}

/* 页脚 */
.footer{margin-top:auto;background:var(--bg-800);border-top:1px solid var(--line-1);padding-top:64px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:44px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-col h4{font-size:14px;margin-bottom:14px;letter-spacing:.02em}
.foot-col p{font-size:14px;color:var(--text-300);line-height:1.8}
.foot-col ul li{margin-bottom:10px}
.foot-col ul a{font-size:14px;color:var(--text-300)}
.foot-col ul a:hover{color:var(--accent-400)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line-1);font-size:13.5px;color:var(--text-500);
}
.foot-bottom a{color:var(--text-300)}
.foot-bottom a:hover{color:var(--accent-400)}

/* 响应式 */
@media (min-width:1024px) and (max-width:1279px){
  :root{--side:76px}
  .side-nav{padding:20px 12px;align-items:center}
  .side-nav .logo{padding:6px 0 16px;justify-content:center}
  .side-nav .logo-text,.side-nav .nav-label,.side-nav .side-note{display:none}
  .side-nav .nav-item{justify-content:center;padding:0;width:100%}
  .side-nav .nav-item span{
    position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%);
    background:var(--bg-600);border:1px solid var(--line-2);border-radius:var(--r-sm);
    padding:6px 12px;font-size:13px;color:var(--text-100);white-space:nowrap;
    opacity:0;pointer-events:none;transition:opacity var(--t);z-index:80;
  }
  .side-nav .nav-item:hover span{opacity:1}
  .side-foot{width:100%}
  .side-cta span{display:none}
  .side-cta{width:100%}
}
@media (max-width:1023px){
  .side-nav{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .container{padding:0 24px}
  .section{padding:56px 0}
  .head-grid{grid-template-columns:1fr;min-height:0;padding:28px 0 32px;gap:24px}
  .col-8,.col-4{grid-column:span 12}
  .toc{position:static}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .matrix-item:nth-child(3n){border-right:1px solid var(--line-1)}
  .matrix-item:nth-child(2n){border-right:0}
  .subscribe{grid-template-columns:1fr;padding:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px;padding-bottom:32px}
  .cta-panel{padding:28px}
}
@media (max-width:767px){
  .topbar{height:52px}
  .main{padding-top:52px}
  h1{font-size:30px}
  h2{font-size:23px}
  h3{font-size:18px}
  body{font-size:16px;line-height:1.8}
  .container{padding:0 16px}
  .section{padding:48px 0}
  .entry{grid-template-columns:1fr;gap:16px;padding:20px 0}
  .entry--flip .entry-media{order:0}
  .related-links{grid-template-columns:1fr}
  .matrix{grid-template-columns:1fr}
  .matrix-item{border-right:0 !important}
  .foot-grid{grid-template-columns:1fr}
  .drawer{width:88vw;max-width:340px}
}
@media (max-width:480px){
  .stat-row{gap:18px}
  .entry .entry-meta{font-size:13px}
  .foot-bottom{font-size:12.5px}
  .btn{width:100%}
  .btn-row{width:100%}
  .link-block{padding:22px}
  .cta-panel{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
  .entry:hover .entry-media img{transform:none}
  .link-block:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg-900:#060B14;
  --bg-800:#0B1424;
  --bg-700:#101C31;
  --bg-600:#16243C;
  --line-1:rgba(122,160,220,.14);
  --line-2:rgba(122,160,220,.28);
  --line-hot:rgba(33,230,193,.55);
  --brand-600:#1F55D6;
  --brand-500:#2C6BFF;
  --brand-400:#4E86FF;
  --brand-glow:rgba(44,107,255,.45);
  --accent-500:#14C9A8;
  --accent-400:#21E6C1;
  --amber-400:#FFB020;
  --danger-400:#FF6B6B;
  --text-100:#EAF1FF;
  --text-300:#A9B8D4;
  --text-500:#6C7C99;
  --r-xs:4px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-full:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset,0 12px 28px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px var(--line-2);
  --shell:260px;
  --ease:cubic-bezier(.4,0,.2,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-300);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(122,160,220,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,220,.035) 1px,transparent 1px);
  background-size:40px 40px;
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:linear-gradient(120deg,rgba(44,107,255,.10),rgba(6,11,20,0) 44%,rgba(33,230,193,.07));
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--text-100);letter-spacing:-.01em;font-weight:700}
h1{font-size:44px;line-height:1.15}
h2{font-size:30px;line-height:1.25}
h3{font-size:20px;line-height:1.4}
h4{font-size:17px;line-height:1.45}
p{margin:0}
:focus-visible{outline:2px solid var(--accent-400);outline-offset:2px;border-radius:4px}
::selection{background:rgba(33,230,193,.28);color:var(--text-100)}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;background:var(--bg-600);color:var(--text-100);
  padding:10px 18px;border-radius:var(--r-sm);border:1px solid var(--line-hot);
}
.skip-link:focus{left:16px;top:16px}
.num{font-variant-numeric:tabular-nums;font-weight:600}

/* ============ 侧边导航 ============ */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--shell);z-index:60;
  display:flex;flex-direction:column;gap:22px;
  padding:22px 16px 20px;
  background:rgba(11,20,36,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line-1);
  transition:transform 220ms var(--ease);
}
.brand{display:flex;align-items:center;gap:11px;padding:6px 8px 18px;border-bottom:1px solid var(--line-1)}
.logo-mark{
  position:relative;display:inline-block;width:34px;height:34px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  clip-path:polygon(50% 0,100% 30%,100% 70%,50% 100%,0 70%,0 30%);
  box-shadow:0 0 18px rgba(33,230,193,.35);
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;background:var(--bg-900);
  clip-path:polygon(50% 0,100% 30%,100% 70%,50% 100%,0 70%,0 30%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text b{color:var(--text-100);font-size:15px;letter-spacing:-.01em;white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-500);white-space:nowrap}
.nav-label{display:block;font-size:12px;color:var(--text-500);letter-spacing:.14em;padding:0 10px 8px}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1 1 auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:11px;
  min-height:44px;padding:0 12px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-300);
  transition:background 180ms var(--ease),color 180ms var(--ease);
}
.nav-item i{
  width:7px;height:7px;flex:0 0 7px;border-radius:50%;
  background:var(--text-500);transition:background 180ms var(--ease),box-shadow 180ms var(--ease);
}
.nav-item:hover{background:rgba(122,160,220,.08);color:var(--text-100)}
.nav-item:hover i{background:var(--brand-400)}
.nav-item.is-active{
  background:rgba(33,230,193,.08);color:var(--text-100);font-weight:600;
}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;
  background:var(--accent-400);box-shadow:0 0 12px var(--accent-400);
}
.nav-item.is-active i{background:var(--accent-400);box-shadow:0 0 10px var(--accent-400)}
.side-foot{padding-top:14px;border-top:1px solid var(--line-1)}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  display:none;position:fixed;left:0;right:0;top:0;height:56px;z-index:70;
  align-items:center;gap:12px;padding:0 14px;
  background:rgba(11,20,36,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-1);
}
.topbar .logo-mark{width:28px;height:28px;flex:0 0 28px}
.topbar-title{font-size:15px;color:var(--text-100);font-weight:600;flex:1 1 auto;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-1);border-radius:var(--r-sm);background:transparent;color:var(--text-300);
  cursor:pointer;transition:all 180ms var(--ease);
}
.icon-btn:hover{border-color:var(--line-hot);color:var(--accent-400)}
.burger-lines{display:block;width:18px;height:2px;background:currentColor;position:relative}
.burger-lines::before,.burger-lines::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform 180ms var(--ease)}
.burger-lines::before{top:-6px}
.burger-lines::after{top:6px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,11,20,.72);z-index:55;opacity:0;visibility:hidden;
  transition:opacity 200ms var(--ease),visibility 200ms var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 布局 ============ */
.shell{margin-left:var(--shell);position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column}
main{flex:1 1 auto}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section + .section{padding-top:0}
.sec-head{max-width:760px;margin-bottom:24px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--accent-400);
  padding:4px 10px;border-radius:var(--r-full);background:rgba(33,230,193,.12);margin-bottom:14px;
}
.sec-head h2{margin-bottom:10px}
.sec-head p{color:var(--text-300);max-width:720px}
.divider{height:1px;background:var(--line-1);border:0;margin:0}

/* ============ 首屏 ============ */
.cat-hero{position:relative;min-height:320px;display:flex;align-items:flex-end;overflow:hidden;border-bottom:1px solid var(--line-1)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-veil{position:absolute;inset:0;z-index:1;background:linear-gradient(100deg,rgba(6,11,20,.94) 10%,rgba(6,11,20,.78) 48%,rgba(6,11,20,.58) 100%)}
.hero-inner{position:relative;z-index:2;padding:70px 0 42px;max-width:840px}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-500);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--text-500);transition:color 180ms var(--ease)}
.crumb a:hover{color:var(--accent-400)}
.crumb .is-current{color:var(--text-100)}
.badge{
  display:inline-block;font-size:12px;font-weight:600;line-height:1.4;
  padding:4px 10px;border-radius:var(--r-full);
}
.badge-accent{background:rgba(33,230,193,.12);color:var(--accent-400)}
.badge-brand{background:rgba(78,134,255,.14);color:var(--brand-400)}
.badge-amber{background:rgba(255,176,32,.14);color:var(--amber-400)}
.hero-inner .badge{margin-bottom:16px}
.hero-inner h1{margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--text-300);max-width:660px}

/* 锚点条 */
.anchor-bar{
  position:sticky;top:0;z-index:30;
  background:rgba(11,20,36,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-1);
}
.anchor-bar ul{display:flex;gap:8px;padding:10px 0;overflow-x:auto;scrollbar-width:none}
.anchor-bar ul::-webkit-scrollbar{display:none}
.anchor-bar a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 16px;white-space:nowrap;
  border-radius:var(--r-full);font-size:14px;color:var(--text-300);
  border:1px solid transparent;transition:all 180ms var(--ease);
}
.anchor-bar a:hover{color:var(--accent-400);border-color:var(--line-hot);background:rgba(33,230,193,.06)}
.anchor-bar a:active{transform:translateY(1px)}

/* ============ 瀑布条目 ============ */
.waterfall{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.wf-col{display:flex;flex-direction:column;gap:24px}
.wf-col--offset{margin-top:40px}
.entry-card{
  background:var(--bg-700);
  border:1px solid var(--line-1);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-2)}
.entry-media{
  position:relative;aspect-ratio:4/3;background:var(--bg-800);
  border-bottom:1px solid var(--line-1);overflow:hidden;
}
.entry-media img{width:100%;height:100%;object-fit:cover;transition:transform 240ms var(--ease)}
.entry-card:hover .entry-media img{transform:scale(1.03)}
.entry-body{padding:20px 22px 22px}
.entry-body .badge{margin-bottom:12px}
.entry-body h3{margin-bottom:10px}
.entry-body p{
  font-size:15px;color:var(--text-300);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line-1);
  font-size:13px;color:var(--text-500);
}
.entry-meta .go{display:inline-flex;align-items:center;gap:6px;color:var(--brand-400);font-weight:600;transition:color 180ms var(--ease)}
.entry-meta .go span{transition:transform 180ms var(--ease)}
.entry-card:hover .entry-meta .go{color:var(--accent-400)}
.entry-card:hover .entry-meta .go span{transform:translateX(4px)}

/* ============ 对比表 ============ */
.table-wrap{
  border:1px solid var(--line-1);border-radius:var(--r-md);overflow:hidden;
  background:var(--bg-800);box-shadow:var(--shadow-card);
}
table.data-table{width:100%;border-collapse:collapse;font-size:15px}
.data-table thead th{
  background:var(--bg-700);color:var(--text-100);font-size:14px;font-weight:600;text-align:left;
  padding:14px 18px;border-bottom:1px solid var(--line-1);white-space:nowrap;
}
.data-table tbody td{
  padding:16px 18px;border-bottom:1px solid var(--line-1);color:var(--text-300);vertical-align:top;line-height:1.7;
}
.data-table tbody tr{transition:background 180ms var(--ease)}
.data-table tbody tr:hover{background:rgba(122,160,220,.06)}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody td:first-child{color:var(--text-100);font-weight:600}
.data-table .tagcell{color:var(--accent-400);font-variant-numeric:tabular-nums;font-weight:600}

/* ============ 时间线 ============ */
.timeline{position:relative;display:flex;flex-direction:column;gap:0;max-width:820px}
.tl-item{position:relative;display:grid;grid-template-columns:24px 1fr;gap:18px;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:11px;top:20px;bottom:-2px;width:1px;background:var(--line-2);
}
.tl-item:last-child::before{display:none}
.tl-dot{
  grid-column:1;width:12px;height:12px;margin-top:7px;margin-left:5px;border-radius:50%;
  background:var(--accent-400);box-shadow:0 0 0 4px rgba(33,230,193,.14),0 0 14px rgba(33,230,193,.5);
}
.tl-body h3{font-size:17px;margin-bottom:8px}
.tl-body h3 .num{color:var(--accent-400);margin-right:8px;font-size:15px}
.tl-body p{font-size:15px;color:var(--text-300);max-width:680px}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
  background:var(--bg-800);border:1px solid var(--line-1);border-radius:var(--r-md);
  border-left:2px solid transparent;
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.faq-item[open]{border-left-color:var(--accent-400);background:var(--bg-700)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:18px 22px;color:var(--text-100);font-size:17px;font-weight:600;
  transition:color 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent-400)}
.faq-item summary .sign{
  margin-left:auto;flex:0 0 20px;width:20px;height:20px;position:relative;
  transition:transform 200ms var(--ease);
}
.faq-item summary .sign::before,.faq-item summary .sign::after{
  content:"";position:absolute;left:3px;top:9px;width:14px;height:2px;border-radius:2px;background:var(--accent-400);
  transition:transform 200ms var(--ease),opacity 200ms var(--ease);
}
.faq-item summary .sign::after{transform:rotate(90deg)}
.faq-item[open] summary .sign::after{transform:rotate(0deg);opacity:0}
.faq-item .faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-300)}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:
    linear-gradient(135deg,rgba(44,107,255,.16),rgba(33,230,193,.14)),
    var(--bg-800);
  border:1px solid var(--line-hot);
  padding:52px 48px;
  box-shadow:var(--shadow-card);
}
.cta-panel h2{margin-bottom:12px;max-width:620px}
.cta-panel > p{max-width:640px;color:var(--text-300);margin-bottom:28px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end;max-width:620px}
.field{display:flex;flex-direction:column;gap:8px;flex:1 1 280px;min-width:220px}
.field label{font-size:14px;color:var(--text-300)}
.field input{
  background:var(--bg-900);border:1px solid var(--line-1);border-radius:var(--r-sm);
  padding:12px 14px;color:var(--text-100);min-height:44px;transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.field input::placeholder{color:var(--text-500)}
.field input:focus{outline:none;border-color:var(--line-hot);box-shadow:0 0 0 3px rgba(33,230,193,.12)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:all 180ms var(--ease);white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  color:var(--bg-900);font-weight:700;
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(33,230,193,.45) inset,0 0 22px rgba(33,230,193,.28)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text-100)}
.btn-ghost:hover{border-color:var(--line-hot);color:var(--accent-400)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed;filter:none;transform:none}
.btn .arrow{transition:transform 180ms var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}

/* ============ 页脚 ============ */
.footer{
  border-top:1px solid var(--line-1);background:var(--bg-800);margin-top:96px;padding:64px 0 0;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.foot-col h4{font-size:14px;margin-bottom:16px;color:var(--text-100)}
.foot-col p{font-size:14px;color:var(--text-300);max-width:340px;line-height:1.8}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col ul a{font-size:14px;color:var(--text-300);transition:color 180ms var(--ease)}
.foot-col ul a:hover{color:var(--accent-400)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line-1);
  font-size:13px;color:var(--text-500);
}
.foot-bottom a{color:var(--text-500);transition:color 180ms var(--ease)}
.foot-bottom a:hover{color:var(--accent-400)}

/* ============ 响应式 ============ */
@media (min-width:1024px) and (max-width:1279px){
  :root{--shell:76px}
  .brand-text,.nav-label,.side-nav .nav-item span{display:none}
  .brand{justify-content:center;padding-left:0;padding-right:0}
  .side-nav .nav-item{justify-content:center;padding:0}
  .side-nav .nav-item:hover span{
    display:block;position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%);
    background:var(--bg-600);border:1px solid var(--line-2);border-radius:var(--r-sm);
    padding:8px 14px;font-size:14px;color:var(--text-100);white-space:nowrap;z-index:80;
    box-shadow:var(--shadow-hover);
  }
  .side-foot .btn{width:100%;padding:0;font-size:0;gap:0}
  .side-foot .btn::after{content:"订阅";font-size:13px}
}
@media (max-width:1023px){
  :root{--shell:0px}
  .topbar{display:flex}
  .sidebar{
    width:280px;transform:translateX(-100%);
    background:rgba(11,20,36,.96);
    padding-top:20px;
  }
  .sidebar.is-open{transform:translateX(0)}
  .shell{margin-left:0;padding-top:56px}
  .container{padding:0 24px}
  .section{padding:72px 0}
  .section + .section{padding-top:0}
  .anchor-bar{position:static}
  .waterfall{gap:20px}
  .wf-col{gap:20px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer{margin-top:72px}
  h1{font-size:34px}
  h2{font-size:25px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section + .section{padding-top:0}
  .sidebar{width:88%;max-width:340px}
  h1{font-size:30px;line-height:1.2}
  h2{font-size:23px}
  .hero-inner{padding:56px 0 34px}
  .cat-hero{min-height:360px}
  .hero-sub{font-size:16px}
  .waterfall{grid-template-columns:1fr}
  .wf-col--offset{margin-top:0}
  .cta-panel{padding:32px 22px}
  .cta-actions .btn{width:100%}
  .cta-form .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .data-table thead th,.data-table tbody td{padding:12px 14px;font-size:14px}
  .table-wrap{overflow-x:auto}
  .data-table{min-width:560px}
}
@media (max-width:480px){
  .badge{font-size:11px}
  .entry-body{padding:16px 16px 18px}
  .entry-body .badge{display:none}
  .tl-item{grid-template-columns:18px 1fr;gap:14px}
  .faq-item summary{padding:16px;font-size:16px}
  .faq-item .faq-answer{padding:0 16px 18px}
  .btn{width:100%}
  .icon-btn{width:40px;height:40px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .entry-card:hover{transform:none}
  .entry-card:hover .entry-media img{transform:none}
}