:root{
  --app-bg:#f3f7fb;
  --app-bg-2:#e9f1f8;
  --ink:#0f172a;
  --ink-soft:rgba(15,23,42,.68);
  --accent:#0ea5e9;
  --accent-2:#2563eb;
  --line:rgba(148,163,184,.24);
  --panel:rgba(255,255,255,.78);
  --panel-strong:#ffffff;
  --panel2:rgba(241,247,252,.88);
  --shadow:0 24px 70px rgba(15,23,42,.08);
  --shadow-soft:0 10px 30px rgba(15,23,42,.06);
  --radius:22px;
  --font-body:"Noto Sans SC",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  --font-display:"Noto Serif SC","Songti SC","STSong",serif;
  font-family:var(--font-body);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  font-family:var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(14,165,233,.14), transparent 26%),
    radial-gradient(circle at 80% 10%, rgba(37,99,235,.10), transparent 20%),
    linear-gradient(180deg, var(--app-bg) 0%, var(--app-bg-2) 100%);
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
.page-bg{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.bg-orb{position:absolute;border-radius:999px;filter:blur(16px);opacity:.7}
.orb-a{width:320px;height:320px;top:-80px;right:6%;background:radial-gradient(circle, rgba(14,165,233,.22), rgba(14,165,233,0))}
.orb-b{width:380px;height:380px;left:-120px;bottom:-90px;background:radial-gradient(circle, rgba(37,99,235,.14), rgba(37,99,235,0))}
.bg-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(148,163,184,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,.09) 1px, transparent 1px);
  background-size:36px 36px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.18), transparent 62%);
}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.app{position:relative;z-index:1;display:flex;min-height:100vh}
.sidebar{
  width:272px;flex:0 0 272px;border-right:1px solid rgba(255,255,255,.36);
  background:linear-gradient(180deg, rgba(255,255,255,.72), rgba(255,255,255,.52));
  backdrop-filter:blur(22px);padding:22px 16px;position:sticky;top:0;height:100dvh;
  box-shadow:inset -1px 0 0 rgba(148,163,184,.12);
}
.content{flex:1;min-width:0}
.content-shell{padding:22px}
.brand{
  display:flex;align-items:center;gap:14px;padding:14px;border-radius:20px;
  background:linear-gradient(135deg, rgba(255,255,255,.92), rgba(240,249,255,.82));
  border:1px solid rgba(255,255,255,.7);box-shadow:var(--shadow-soft)
}
.brand:hover{transform:translateY(-1px)}
.logo{
  width:48px;height:48px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;
  color:white;background:linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow:0 16px 30px rgba(14,165,233,.28)
}
.logo svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;gap:4px;line-height:1.1}
.brand-title{font-size:16px;font-weight:700;letter-spacing:-.02em}
.brand-sub{font-size:12px;color:rgba(15,23,42,.55)}
.side-label{
  margin:18px 10px 6px;font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:rgba(15,23,42,.38)
}
.side-nav{margin-top:16px;display:grid;gap:8px}
.side-item{
  display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:16px;font-size:14px;font-weight:700;
  color:rgba(15,23,42,.68);border:1px solid transparent;transition:all .18s ease
}
.side-item-btn{
  width:100%;appearance:none;background:transparent;text-align:left;cursor:pointer;font:inherit
}
.side-item:hover{
  background:rgba(255,255,255,.72);border-color:rgba(148,163,184,.18);color:var(--ink);transform:translateX(2px)
}
.side-item.is-active{
  background:linear-gradient(135deg, rgba(255,255,255,.94), rgba(240,249,255,.88));
  border-color:rgba(14,165,233,.18);color:var(--ink);box-shadow:var(--shadow-soft)
}
.side-ico{
  width:34px;height:34px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.8);border:1px solid rgba(148,163,184,.18);color:rgba(15,23,42,.6)
}
.side-item.is-active .side-ico{color:var(--accent);background:rgba(224,242,254,.9)}
.side-ico svg{width:18px;height:18px}
.corner-icon{
  position:fixed;top:18px;right:20px;width:46px;height:46px;border-radius:16px;border:1px solid rgba(255,255,255,.7);
  background:rgba(255,255,255,.78);backdrop-filter:blur(16px);display:flex;align-items:center;justify-content:center;
  color:rgba(15,23,42,.68);z-index:30;box-shadow:var(--shadow-soft)
}
.corner-icon:hover{color:var(--ink);transform:translateY(-1px)}
.corner-icon svg{width:20px;height:20px}
.main{padding:8px 0 40px}
.hero{
  position:relative;margin-bottom:18px;padding:30px;border-radius:30px;overflow:hidden;
  background:linear-gradient(135deg, rgba(255,255,255,.9), rgba(240,249,255,.78));
  border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow)
}
.hero > *{position:relative;z-index:1}
.hero:before{
  content:"";position:absolute;right:-48px;top:-48px;width:180px;height:180px;border-radius:999px;
  background:radial-gradient(circle, rgba(14,165,233,.16), transparent 68%)
}
.hero:after{
  content:"";position:absolute;left:32px;bottom:-64px;width:220px;height:120px;border-radius:999px;
  background:radial-gradient(circle, rgba(37,99,235,.12), transparent 70%)
}
.hero-inline:before{
  width:220px;height:220px;right:-84px;top:-74px;background:radial-gradient(circle, rgba(14,165,233,.22), transparent 65%)
}
.hero-inline{padding:26px 28px}
.hero-split{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.9fr);gap:18px;align-items:stretch}
.hero-copy,.hero-panel{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
  background:rgba(255,255,255,.82);border:1px solid rgba(148,163,184,.18);
  font-size:12px;font-weight:700;letter-spacing:.02em;color:rgba(15,23,42,.72)
}
.eyebrow svg{width:14px;height:14px;color:var(--accent)}
.h1{
  margin:0;font-size:30px;font-weight:900;letter-spacing:-.045em;line-height:1.08;
  font-family:var(--font-display)
}
.hero-title{
  margin-top:16px;font-size:40px;max-width:12ch;text-wrap:balance
}
.sub{margin:8px 0 0;font-size:15px;line-height:1.8;color:var(--ink-soft)}
.hero-sub{max-width:740px}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.stat-pill{
  min-width:110px;padding:12px 14px;border-radius:18px;background:rgba(255,255,255,.74);
  border:1px solid rgba(148,163,184,.16);display:grid;gap:4px;box-shadow:var(--shadow-soft)
}
.stat-pill strong{font-size:18px;letter-spacing:-.03em;font-family:var(--font-display)}
.stat-pill span{font-size:12px;color:rgba(15,23,42,.55)}
.hero-panel{
  align-self:stretch;padding:22px;border-radius:24px;background:linear-gradient(180deg, rgba(15,23,42,.94), rgba(15,23,42,.82));
  color:white;display:flex;flex-direction:column;justify-content:flex-end;min-height:100%
}
.hero-panel:before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at top right, rgba(14,165,233,.22), transparent 30%),
    linear-gradient(135deg, rgba(255,255,255,.04), transparent 55%);
  pointer-events:none
}
.hero-panel-kicker{font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:rgba(255,255,255,.6)}
.hero-panel-title{
  margin-top:12px;font-size:24px;font-weight:900;line-height:1.18;letter-spacing:-.035em;
  font-family:var(--font-display)
}
.hero-panel-desc{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.74)}
.hero-panel-foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.hero-mini-pill{
  display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-size:12px;color:rgba(255,255,255,.76)
}
.section-head{
  display:flex;align-items:end;justify-content:space-between;gap:12px;
  margin:28px 0 14px;padding:14px 2px 0;border-top:1px solid rgba(148,163,184,.14)
}
.section-title{font-size:20px;font-weight:900;letter-spacing:-.03em;font-family:var(--font-display)}
.section-sub{margin-top:6px;font-size:13px;color:rgba(15,23,42,.55)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.ai-grid .card-title{font-size:22px}
.media-grid .card-title{font-size:21px}
.feature-wrap{margin:2px 0 8px}
.article-grid .card:nth-child(3n){background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(244,249,255,.9))}
.card{
  position:relative;border:1px solid rgba(255,255,255,.88);background:linear-gradient(180deg, rgba(255,255,255,.9), rgba(248,250,252,.88));
  border-radius:var(--radius);padding:18px;transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  box-shadow:var(--shadow-soft);backdrop-filter:blur(10px)
}
.card:before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(180deg, rgba(255,255,255,.14), transparent 24%, transparent 76%, rgba(14,165,233,.04))
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(14,165,233,.24)}
.card-btn{appearance:none;text-align:left;cursor:pointer}
.card-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.card-index{
  display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:28px;padding:0 12px;
  border-radius:999px;background:rgba(224,242,254,.88);color:#0369a1;font-size:12px;font-weight:800;letter-spacing:.08em
}
.card-arrow{font-size:18px;color:rgba(15,23,42,.28);transition:transform .18s ease,color .18s ease}
.card:hover .card-arrow{transform:translateX(3px);color:var(--accent-2)}
.card-kicker{
  margin-bottom:10px;font-size:11px;text-transform:uppercase;letter-spacing:.2em;color:rgba(15,23,42,.42)
}
.card-meta{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;border:1px solid rgba(148,163,184,.18);background:rgba(255,255,255,.78);
  padding:4px 11px;border-radius:999px;font-size:12px;color:rgba(15,23,42,.75)
}
.muted{font-size:12px;line-height:1.6;color:rgba(15,23,42,.5)}
.card-title{
  margin-top:14px;font-size:21px;font-weight:900;line-height:1.28;letter-spacing:-.035em;
  font-family:var(--font-display)
}
.card-desc{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-soft)}
.card-featured{
  min-height:260px;display:flex;flex-direction:column;justify-content:flex-end;
  background:
    radial-gradient(circle at top right, rgba(14,165,233,.22), transparent 30%),
    radial-gradient(circle at bottom left, rgba(37,99,235,.10), transparent 24%),
    linear-gradient(135deg, rgba(255,255,255,.98), rgba(240,249,255,.92))
}
.card-featured .card-title{font-size:34px;max-width:900px}
.card-featured .card-desc{max-width:900px;font-size:15px}
.card-featured .card-kicker{margin-bottom:12px}
.tool-grid .card-title{font-size:20px}
.tool-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.tool-icon{
  width:48px;height:48px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, rgba(224,242,254,.98), rgba(219,234,254,.95));
  color:var(--accent-2);border:1px solid rgba(148,163,184,.16)
}
.tool-icon svg{width:22px;height:22px}
.tool-tag{
  display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.86);
  border:1px solid rgba(148,163,184,.18);font-size:12px;font-weight:700;color:rgba(15,23,42,.56)
}
.tool-card-foot{
  margin-top:18px;padding-top:14px;border-top:1px solid rgba(148,163,184,.14);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:700;color:rgba(15,23,42,.72)
}
.tool-card-foot span{transition:transform .18s ease}
.card:hover .tool-card-foot span{transform:translateX(4px)}
.back{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:rgba(15,23,42,.66);margin-bottom:12px}
.back:hover{color:var(--ink)}
.article{
  border:1px solid rgba(255,255,255,.88);background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(248,250,252,.9));
  border-radius:28px;overflow:hidden;box-shadow:var(--shadow)
}
.article:before{
  content:"";display:block;height:1px;background:linear-gradient(90deg, transparent, rgba(14,165,233,.45), transparent)
}
.article-head{padding:26px}
.article-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(260px,.65fr);gap:18px}
.article-title{
  margin-top:14px;font-size:42px;line-height:1.14;max-width:16ch;text-wrap:balance
}
.article-sub{max-width:760px}
.article-side{display:grid;gap:12px}
.info-card{
  padding:16px 18px;border-radius:20px;background:linear-gradient(180deg, rgba(248,250,252,.92), rgba(241,247,252,.86));
  border:1px solid rgba(148,163,184,.14)
}
.info-label{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:rgba(15,23,42,.42)}
.info-value{margin-top:10px;font-size:14px;line-height:1.75;color:var(--ink-soft)}
.article-body{
  border-top:1px solid rgba(148,163,184,.12);padding:34px 26px 36px;max-width:860px
}
.p{margin:0 0 16px;font-size:16px;line-height:2;color:rgba(15,23,42,.9)}
.article-body .p:first-child:first-letter{
  float:left;margin:.14em .18em 0 0;font-size:3.2em;line-height:.85;font-family:var(--font-display);color:var(--accent-2)
}
.p:last-child{margin-bottom:0}
.panel{
  border:1px solid rgba(255,255,255,.88);background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(248,250,252,.9));
  border-radius:26px;padding:18px;box-shadow:var(--shadow-soft)
}
.panel:before{
  content:"";display:block;height:3px;width:72px;border-radius:999px;
  background:linear-gradient(90deg, var(--accent), rgba(37,99,235,.2));margin-bottom:14px
}
.hero-tool-single .h1{max-width:none}
.label{font-size:12px;font-weight:700;color:rgba(15,23,42,.56);margin-bottom:8px}
.label-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.textarea,.input{
  width:100%;border-radius:16px;border:1px solid rgba(148,163,184,.18);background:rgba(255,255,255,.84);
  padding:13px 14px;font-size:14px;line-height:1.7;outline:none;color:var(--ink);
  transition:border-color .15s ease, box-shadow .15s ease, transform .15s ease
}
.textarea{min-height:180px;resize:vertical}
.textarea:focus,.input:focus{
  border-color:rgba(14,165,233,.45);box-shadow:0 0 0 4px rgba(14,165,233,.12);transform:translateY(-1px)
}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.btn{
  border:1px solid rgba(148,163,184,.18);background:rgba(255,255,255,.86);border-radius:16px;padding:10px 14px;
  font-size:13px;font-weight:800;cursor:pointer;transition:all .15s ease;color:var(--ink)
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-soft)}
.btn.primary{
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color:transparent;color:white;box-shadow:0 14px 28px rgba(14,165,233,.24)
}
.btn.primary:hover{filter:brightness(.98)}
.btn.ghost{background:transparent}
.notice{
  margin-top:12px;border:1px solid rgba(148,163,184,.14);background:linear-gradient(180deg, rgba(241,247,252,.96), rgba(255,255,255,.84));
  border-radius:18px;padding:12px 14px;font-size:13px;line-height:1.7;color:rgba(15,23,42,.82)
}
.kv{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.kv-item{
  border:1px solid rgba(148,163,184,.14);background:linear-gradient(180deg, rgba(241,247,252,.96), rgba(255,255,255,.84));
  border-radius:18px;padding:14px;display:grid;gap:8px
}
.qr-box{
  margin-top:14px;border:1px dashed rgba(148,163,184,.22);background:linear-gradient(180deg, rgba(241,247,252,.92), rgba(255,255,255,.82));
  border-radius:22px;padding:18px;display:flex;justify-content:center
}
.qr-box img{width:200px;height:200px;border-radius:18px;object-fit:contain;background:white;box-shadow:var(--shadow-soft)}
.modal-backdrop{
  position:fixed;inset:0;background:rgba(15,23,42,.35);display:flex;align-items:center;justify-content:center;z-index:50;padding:18px;
  backdrop-filter:blur(6px)
}
.modal{
  width:min(520px,100%);border:1px solid rgba(255,255,255,.8);background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,250,252,.94));
  border-radius:26px;padding:20px;box-shadow:var(--shadow)
}
.modal-title{font-size:20px;font-weight:900;letter-spacing:-.03em;font-family:var(--font-display)}
.modal-desc{margin-top:10px;font-size:12px;color:rgba(15,23,42,.56)}
.modal-code{
  margin-top:10px;border:1px solid rgba(148,163,184,.16);background:linear-gradient(180deg, rgba(241,247,252,.96), rgba(255,255,255,.86));
  border-radius:18px;padding:14px;display:flex;align-items:center;justify-content:space-between;gap:10px
}
.modal-actions{margin-top:14px;display:flex;justify-content:flex-end}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}
.hero,.card,.panel,.article{animation:fadeUp .5s ease both}
.hero-stats .stat-pill:nth-child(1),.article-grid .card:nth-child(1),.tool-grid .card:nth-child(1){animation-delay:.04s}
.hero-stats .stat-pill:nth-child(2),.article-grid .card:nth-child(2),.tool-grid .card:nth-child(2){animation-delay:.08s}
.hero-stats .stat-pill:nth-child(3),.article-grid .card:nth-child(3),.tool-grid .card:nth-child(3){animation-delay:.12s}
.article-grid .card:nth-child(4),.tool-grid .card:nth-child(4){animation-delay:.16s}
.article-grid .card:nth-child(5),.tool-grid .card:nth-child(5){animation-delay:.2s}
.article-grid .card:nth-child(6),.tool-grid .card:nth-child(6){animation-delay:.24s}
@media (max-width:1100px){
  .hero-split,.article-hero{grid-template-columns:1fr}
  .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .grid,.grid-2,.kv,.tool-grid{grid-template-columns:1fr}
  .app{flex-direction:column}
  .sidebar{
    width:100%;flex:0 0 auto;height:auto;position:sticky;top:0;border-right:none;border-bottom:1px solid rgba(255,255,255,.48);
    padding:12px 14px;background:rgba(255,255,255,.72)
  }
  .content-shell{padding:12px}
  .side-label{display:none}
  .side-nav{display:flex;gap:8px;margin-top:12px}
  .side-item{flex:1;justify-content:center;padding:11px 10px}
  .side-item span:last-child{display:none}
  .hero{padding:22px}
  .hero-title,.card-featured .card-title,.article-title{font-size:30px}
  .h1{font-size:26px}
  .card-title{font-size:18px}
  .card-meta{flex-direction:column;align-items:flex-start}
  .article-head,.article-body{padding:20px}
  .corner-icon{top:auto;bottom:16px;right:16px}
}