:root{
  --bg:#08080a;--bg-card:#151515;--bg-card2:#1a1a1c;--bg-hover:#202023;
  --border:#2a2a2e;--border-dim:#222225;
  --text:#f2f2f4;--text-2:#b8b8bf;--text-3:#7a7a83;
  --blue:#2b7fff;--cyan:#00eeff;--green:#49ee9f;--yellow:#ffc848;--orange:#ff8000;--red:#ff6f5e;
  --radius:12px;--radius-lg:24px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:Consolas,Menlo,"JetBrains Mono",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.65}
a{color:inherit;text-decoration:none}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.empty{padding:48px 0;text-align:center;color:var(--text-3)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(8,8,10,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-dim)}
.header-inner{display:flex;align-items:center;gap:26px;height:62px}
.logo img{height:26px;display:block;filter:brightness(1.25)}
.main-nav{display:flex;gap:20px;flex:1}
.main-nav a{color:var(--text-2);font-size:14.5px;font-weight:500;transition:color .15s}
.main-nav a:hover{color:var(--cyan)}
.header-search input{width:190px;padding:7px 14px;border-radius:999px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);font-size:13.5px;font-family:inherit;outline:none}
.header-search input:focus{border-color:var(--blue)}
.header-search input::placeholder{color:var(--text-3)}

/* hero */
.hero{padding:72px 0 48px;text-align:center;background:radial-gradient(ellipse 70% 60% at 50% -10%,rgba(43,127,255,.16),transparent),radial-gradient(ellipse 40% 40% at 80% 10%,rgba(0,238,255,.08),transparent)}
.hero h1{font-size:44px;font-weight:700;letter-spacing:-.01em;background:linear-gradient(90deg,#fff 30%,var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:14px}
.hero-sub{color:var(--text-2);font-size:16px;margin-bottom:30px}
.hero-tags{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.hero-tag{padding:8px 20px;border-radius:999px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-2);font-size:14px;transition:all .15s}
.hero-tag:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 16px rgba(0,238,255,.15)}
.platform-row{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;max-width:820px;margin:0 auto}
.platform-chip{padding:4px 12px;border-radius:6px;border:1px solid var(--border-dim);background:var(--bg-card);color:var(--text-3);font-size:12px;font-family:var(--mono)}

/* guide bar */
.guide-bar{border-top:1px solid var(--border-dim);border-bottom:1px solid var(--border-dim);background:var(--bg-card);padding:18px 0;margin-bottom:56px}
.guide-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.guide-left{display:flex;align-items:center;gap:16px}
.guide-q{font-size:15px;font-weight:600}
.btn{display:inline-block;padding:8px 18px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card2);color:var(--text);cursor:pointer;font-size:14px;font-family:inherit;transition:all .15s}
.btn:hover{border-color:var(--blue)}
.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.primary:hover{background:#1f6ae6;box-shadow:0 0 20px rgba(43,127,255,.35)}
.btn.ghost{background:transparent}
.btn.small{padding:4px 12px;font-size:12.5px}
.guide-stats{display:flex;gap:36px}
.g-stat{display:flex;flex-direction:column;align-items:center}
.g-stat b{font-size:20px;color:var(--cyan);font-family:var(--mono)}
.g-stat span{font-size:12px;color:var(--text-3)}

/* section titles */
.title-block{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}
.tr-title{font-size:30px;font-weight:600;text-align:center}
.tr-subtitle{font-size:15px;color:var(--text-2);text-align:center}

/* top ranking */
.top-ranking{margin-bottom:72px}
.tr-panel{display:grid;grid-template-columns:200px 1fr;background:var(--bg-card);border:1px solid var(--border-dim);border-radius:var(--radius-lg);overflow:hidden}
.tr-sidebar{padding:22px;border-right:1px solid var(--border-dim);display:flex;flex-direction:column;gap:4px}
.side-item{padding:9px 14px;border-radius:10px;color:var(--text-2);font-size:14px}
.side-item:hover{background:var(--bg-hover);color:var(--text)}
.side-item.active{background:var(--bg-card2);color:var(--cyan);font-weight:600;box-shadow:inset 2px 0 0 var(--cyan)}
.tr-list{padding:22px;display:flex;flex-direction:column;gap:10px}
.top-row{display:flex;align-items:center;gap:16px;padding:13px 16px;border-radius:var(--radius);border:1px solid transparent;transition:all .15s}
.top-row:hover{background:var(--bg-hover);border-color:var(--border-dim)}
.rank{width:34px;text-align:center;flex:none}
.rank-badge{font-size:22px;line-height:30px}
.rank-num{font-size:20px;font-family:var(--mono);color:var(--text-3);font-weight:500}
.emoji-icon{font-size:28px;line-height:36px;flex:none}
.skill-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.skill-title{font-size:15.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.skill-subtitle{font-size:13px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badges{display:flex;align-items:center;gap:8px;flex:none}
.bss-badge{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:22px;padding:0 8px;border-radius:6px;font-family:var(--mono);font-size:12px;font-weight:600}
.lvl-s-plus{background:rgba(73,238,159,.12);border:1px solid rgba(73,238,159,.4);color:var(--green)}
.lvl-s{background:rgba(73,238,159,.08);border:1px solid rgba(73,238,159,.28);color:var(--green)}
.lvl-a{background:rgba(0,158,255,.1);border:1px solid rgba(0,158,255,.35);color:#009eff}
.lvl-b{background:rgba(255,200,72,.1);border:1px solid rgba(255,200,72,.35);color:var(--yellow)}
.lvl-c,.lvl-d{background:rgba(255,79,79,.1);border:1px solid rgba(255,79,79,.35);color:var(--red)}
.cls-badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:999px;background:rgba(0,238,255,.08);border:1px solid rgba(0,238,255,.25);color:var(--cyan);font-size:11px;white-space:nowrap}
.metrics{display:flex;flex-direction:column;align-items:flex-end;gap:1px;flex:none;font-family:var(--mono);font-size:12px;color:var(--text-3)}
.metrics span{white-space:nowrap}
.row-tag{display:inline-block;padding:2px 10px;border-radius:999px;background:var(--bg-card2);border:1px solid var(--border-dim);color:var(--text-3);font-size:11px;margin-right:6px}
.tr-pager{display:flex;gap:8px;justify-content:center;margin-top:14px;flex-wrap:wrap}
.tr-pager a{min-width:32px;padding:5px 10px;text-align:center;border-radius:8px;border:1px solid var(--border-dim);color:var(--text-2);font-size:13px;font-family:var(--mono)}
.tr-pager a:hover{border-color:var(--blue)}
.tr-pager a.cur{background:var(--blue);border-color:var(--blue);color:#fff}

/* topics */
.topics{margin-bottom:72px}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.topic-card{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;min-height:190px;padding:22px;border-radius:var(--radius-lg);border:1px solid var(--border-dim);overflow:hidden;transition:transform .2s,border-color .2s}
.topic-card:hover{transform:translateY(-3px);border-color:var(--blue)}
.topic-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.topic-title{position:relative;font-size:18px;font-weight:600}
.topic-desc{position:relative;font-size:13.5px;color:rgba(255,255,255,.75)}
.g1{background:linear-gradient(135deg,#0f2027,#203a43 50%,#2c5364)}
.g2{background:linear-gradient(135deg,#232526,#414345)}
.g3{background:linear-gradient(135deg,#1a2a6c,#b21f1f,#fdbb2d)}
.g4{background:linear-gradient(135deg,#0f0c29,#302b63,#24243e)}
.g5{background:linear-gradient(135deg,#134e5e,#71b280)}
.g6{background:linear-gradient(135deg,#41295a,#2f0743)}

/* hot skills tabs */
.hot-skills{margin-bottom:80px}
.hs-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px;justify-content:center}
.hs-tab{padding:8px 18px;border-radius:999px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-2);font-size:13.5px;cursor:pointer;font-family:inherit;transition:all .15s}
.hs-tab:hover{border-color:var(--blue);color:var(--text)}
.hs-tab.active{background:var(--cyan);border-color:var(--cyan);color:#06222a;font-weight:600}
.hs-panel{display:flex;flex-direction:column;gap:10px}
.hs-more{display:block;text-align:center;margin-top:16px;color:var(--text-3);font-size:14px}
.hs-more:hover{color:var(--cyan)}

/* search bar */
.search-bar{display:flex;gap:10px;margin-bottom:22px}
.search-bar input{flex:1;max-width:460px;padding:10px 16px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);font-size:14px;font-family:inherit;outline:none}
.search-bar input:focus{border-color:var(--blue)}

/* detail page */
.detail-page{padding:48px 20px 80px}
.detail-head{display:flex;gap:22px;align-items:flex-start;margin-bottom:28px}
.detail-emoji{font-size:56px;line-height:1;flex:none}
.detail-title-block h1{font-size:30px;margin-bottom:6px}
.detail-subtitle{color:var(--text-2);font-size:15px;margin-bottom:12px}
.detail-badges{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.detail-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:28px}
.d-metric{background:var(--bg-card);border:1px solid var(--border-dim);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;align-items:center}
.d-metric b{font-size:22px;font-family:var(--mono);color:var(--cyan)}
.d-metric span{font-size:12px;color:var(--text-3)}
.install-box{display:flex;align-items:center;gap:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;margin-bottom:32px;flex-wrap:wrap}
.install-label{font-size:13px;color:var(--text-3);flex:none}
.install-box code{flex:1;min-width:200px;font-family:var(--mono);font-size:14px;color:var(--green);word-break:break-all}
.detail-body{max-width:760px}
.detail-body h2{font-size:19px;margin-bottom:12px}
.detail-body p{color:var(--text-2);font-size:15px}
.detail-link{margin-top:20px;font-size:14px;color:var(--text-3)}
.detail-link a{color:var(--blue)}
.detail-tags{margin-top:24px}
.related-skills{margin-top:56px}
.related-skills h2{font-size:19px;margin-bottom:16px}
.topic-hero{border-radius:var(--radius-lg);padding:44px 36px;margin:40px 0 32px}
.topic-hero h1{font-size:28px;margin-bottom:10px}
.topic-hero p{color:rgba(255,255,255,.8);font-size:15px}

/* footer */
.site-footer{border-top:1px solid var(--border-dim);background:var(--bg-card);padding:44px 0 32px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:26px}
.footer-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);margin-bottom:14px}
.footer-col p{font-size:13px;color:var(--text-3);line-height:1.7}
.footer-col a{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:9px}
.footer-col a:hover{color:var(--cyan)}
.footer-col .legend{display:flex;gap:6px;flex-wrap:wrap}
.copy{margin-top:16px;font-size:12px}

@media(max-width:860px){
  .hero h1{font-size:32px}
  .tr-panel{grid-template-columns:1fr}
  .tr-sidebar{flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--border-dim)}
  .top-row{flex-wrap:wrap}
  .metrics{flex-direction:row;gap:14px;width:100%;justify-content:flex-end}
  .guide-stats{gap:20px}
  .header-search{display:none}
  .main-nav{gap:14px}
}