/* roulang page: index */
:root{
  --brand:#0f8f74;
  --brand-dark:#0a6b57;
  --brand-soft:#e6f6f1;
  --ink:#0d1b2a;
  --ink-2:#132c40;
  --text:#1c2733;
  --muted:#61707f;
  --line:#e2e8ef;
  --bg:#f4f7fa;
  --surface:#ffffff;
  --warn:#c8822a;
  --warn-soft:#fdf4e6;
  --radius-lg:20px;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
  --shadow:0 14px 38px rgba(13,27,42,.10);
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-wrap:break-word;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;cursor:pointer}
input{font:inherit}
:focus-visible{outline:3px solid rgba(15,143,116,.45);outline-offset:2px;border-radius:6px}
.site-container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  color:#fff;font-size:19px;font-weight:700;letter-spacing:1px;
  box-shadow:0 6px 16px rgba(10,107,87,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:19px;letter-spacing:.5px;color:var(--ink)}
.brand-text small{font-size:12px;color:var(--muted);letter-spacing:.3px}
.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:#33414f;font-weight:500;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.nav-link:hover{background:#eef3f7;color:var(--brand-dark)}
.nav-link.is-active{color:var(--brand-dark);background:var(--brand-soft);font-weight:600}
.nav-cta{
  margin-left:6px;color:#fff;font-weight:600;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  box-shadow:0 8px 18px rgba(10,107,87,.22);
}
.nav-cta:hover{color:#fff;background:linear-gradient(150deg,#0f8f74,#085646);transform:translateY(-1px)}
.step-bar{
  display:flex;align-items:center;gap:8px;
  padding-bottom:12px;overflow-x:auto;scrollbar-width:none;
}
.step-bar::-webkit-scrollbar{display:none}
.step-item{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  padding:6px 13px;border-radius:999px;
  background:#f1f5f9;border:1px solid var(--line);
  font-size:13px;color:#48586a;
  transition:border-color .18s ease,background .18s ease,color .18s ease;
}
.step-item:hover{border-color:#bcd8d0;background:var(--brand-soft);color:var(--brand-dark)}
.step-num{
  width:20px;height:20px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:#dbe5ec;color:#3a4a5b;font-size:12px;font-weight:700;
}
.step-item:hover .step-num{background:#0f8f74;color:#fff}

/* hero */
.hero{
  position:relative;
  background:
    radial-gradient(1100px 520px at 82% -10%,rgba(18,161,132,.34),transparent 60%),
    radial-gradient(760px 460px at 4% 110%,rgba(37,86,128,.42),transparent 62%),
    linear-gradient(158deg,#0d1b2a 0%,#122c40 58%,#0d2436 100%);
  color:#e9f1f6;
  padding:58px 0 64px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:38px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.18);
  font-size:13px;letter-spacing:.6px;color:#c6f0e4;
}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:#3fdcb4;display:inline-block}
.hero h1{
  margin:20px 0 16px;
  font-size:37px;line-height:1.3;letter-spacing:.4px;font-weight:800;color:#fff;
}
.hero h1 em{font-style:normal;color:#4fe0b8}
.hero-lead{font-size:16px;line-height:1.9;color:#c2d2de;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(150deg,#13a888,#0a6b57);color:#fff;box-shadow:0 12px 26px rgba(9,90,74,.38)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(9,90,74,.46)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.08);color:#e6f1f6;border-color:rgba(255,255,255,.26)}
.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.44)}
.btn-line{background:#fff;color:var(--brand-dark);border-color:#cfe6df;box-shadow:var(--shadow-sm)}
.btn-line:hover{background:var(--brand-soft);transform:translateY(-2px)}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.fact-pill{
  padding:7px 14px;border-radius:10px;font-size:13px;color:#bfd3e0;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
}

/* demo panel */
.demo-panel{
  background:rgba(255,255,255,.97);
  color:var(--text);
  border-radius:var(--radius-lg);
  padding:22px;box-shadow:0 26px 54px rgba(4,18,28,.44);
  border:1px solid rgba(255,255,255,.6);
}
.demo-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-bottom:14px;border-bottom:1px dashed var(--line)}
.demo-title{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;color:var(--ink)}
.demo-dot{width:9px;height:9px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(15,143,116,.14)}
.demo-tag{font-size:12px;color:var(--warn);background:var(--warn-soft);border:1px solid #f3ddb9;padding:3px 10px;border-radius:999px}
.demo-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid #f1f5f8;font-size:14px;color:#556473}
.demo-row strong{font-size:16px;color:var(--ink);font-weight:700}
.demo-bar{height:9px;border-radius:999px;background:#eef3f7;margin:16px 0 12px;overflow:hidden}
.demo-bar span{display:block;height:100%;width:20%;border-radius:999px;background:linear-gradient(90deg,#12a184,#0a6b57)}
.demo-note{font-size:13px;line-height:1.8;color:var(--muted);background:#f6f9fb;border-radius:10px;padding:12px 14px}

/* sections */
.section{padding:62px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:32px}
.section-kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--brand-dark);background:var(--brand-soft);
  padding:5px 12px;border-radius:8px;margin-bottom:14px;
}
.section-head h2{font-size:27px;line-height:1.4;color:var(--ink);font-weight:800;letter-spacing:.3px}
.section-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.9}

/* download */
.download-band{
  background:linear-gradient(140deg,#0f8f74 0%,#0a6b57 62%,#085345 100%);
  border-radius:var(--radius-lg);
  padding:32px;color:#eafaf5;
  box-shadow:0 18px 40px rgba(10,107,87,.26);
  display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center;
}
.download-band h2{font-size:24px;color:#fff;font-weight:800;line-height:1.4}
.download-band p{margin-top:10px;font-size:14.5px;line-height:1.9;color:#d3f0e7}
.download-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.dl-btn{
  display:flex;flex-direction:column;align-items:flex-start;gap:6px;
  padding:16px;border-radius:var(--radius);
  background:rgba(255,255,255,.96);color:var(--ink);
  border:1px solid rgba(255,255,255,.7);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.dl-btn:hover{transform:translateY(-3px);box-shadow:0 16px 30px rgba(4,40,32,.32);background:#fff}
.dl-btn:active{transform:translateY(0)}
.dl-btn svg{width:22px;height:22px;color:var(--brand-dark)}
.dl-name{font-size:15px;font-weight:700}
.dl-file{font-size:12px;color:var(--muted);letter-spacing:.4px}
.dl-tip{margin-top:16px;font-size:13px;color:#bfe6da;line-height:1.8}

/* search */
.search-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow-sm);
}
.search-field{display:flex;gap:10px;flex-wrap:wrap}
.search-field input{
  flex:1 1 260px;min-width:0;
  padding:13px 16px;border-radius:12px;border:1px solid var(--line);
  background:#f8fafc;color:var(--text);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search-field input:focus{outline:none;border-color:#9ed6c8;background:#fff;box-shadow:0 0 0 4px rgba(15,143,116,.12)}
.chip-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.chip{
  padding:7px 14px;border-radius:999px;font-size:13.5px;
  background:#f2f6f9;color:#42525f;border:1px solid var(--line);
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.chip:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:#bfe0d6}

/* category matrix */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.entry-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe6df}
.entry-icon{
  width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-weight:800;font-size:16px;
}
.entry-card h3{font-size:17px;color:var(--ink);font-weight:700}
.entry-card p{font-size:14.5px;color:var(--muted);line-height:1.85}
.entry-more{font-size:13.5px;font-weight:600;color:var(--brand-dark)}
.entry-card.feature{border-color:#cfe6df;background:linear-gradient(160deg,#f3fbf8,#ffffff)}

/* lists */
.pick-layout{display:grid;grid-template-columns:1.55fr .95fr;gap:24px;align-items:start}
.pick-list{display:flex;flex-direction:column;gap:12px}
.pick-item{
  display:flex;gap:16px;align-items:flex-start;min-width:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.pick-item:hover{border-color:#bfe0d6;transform:translateX(3px);box-shadow:var(--shadow)}
.pick-index{
  flex:0 0 34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:#eef4f8;color:#4c5f70;font-weight:800;font-size:14px;
}
.pick-body{min-width:0;display:flex;flex-direction:column;gap:6px}
.pick-body h3{font-size:16.5px;color:var(--ink);font-weight:700;line-height:1.5}
.pick-body p{font-size:14px;color:var(--muted);line-height:1.8}
.post-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12.5px;color:#7c8b99}
.post-cat{background:var(--brand-soft);color:var(--brand-dark);padding:2px 9px;border-radius:6px;font-weight:600}
.aside-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.aside-box h3{font-size:16px;color:var(--ink);margin-bottom:14px;font-weight:700}
.aside-link{display:block;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:#33414f;line-height:1.7;transition:color .18s ease}
.aside-link:last-child{border-bottom:none;padding-bottom:0}
.aside-link:hover{color:var(--brand-dark)}
.aside-link small{display:block;color:#8494a2;font-size:12.5px;margin-top:4px}

.rail{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.rail-card{
  min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:9px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rail-card:hover{transform:translateY(-3px);border-color:#bfe0d6;box-shadow:var(--shadow)}
.rail-card h3{font-size:15.5px;line-height:1.6;color:var(--ink);font-weight:700}
.rail-card p{font-size:13.5px;color:var(--muted);line-height:1.8}

.rank-list{display:flex;flex-direction:column;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.rank-item{display:flex;align-items:center;gap:16px;padding:16px 22px;border-bottom:1px solid var(--line);transition:background .18s ease}
.rank-item:last-child{border-bottom:none}
.rank-item:hover{background:#f7fafc}
.rank-num{flex:0 0 34px;font-size:17px;font-weight:800;color:#b8c6d2;font-variant-numeric:tabular-nums}
.rank-item:nth-child(1) .rank-num,.rank-item:nth-child(2) .rank-num,.rank-item:nth-child(3) .rank-num{color:var(--brand)}
.rank-title{font-size:15.5px;color:var(--ink);font-weight:600;min-width:0}

/* factor cards */
.factor-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;min-width:0;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.factor-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.factor-card span{display:inline-block;font-size:12.5px;font-weight:700;color:var(--brand-dark);background:var(--brand-soft);padding:3px 10px;border-radius:7px;margin-bottom:12px}
.factor-card h3{font-size:16.5px;color:var(--ink);margin-bottom:8px;font-weight:700}
.factor-card p{font-size:14px;color:var(--muted);line-height:1.85}

/* scenario */
.scene-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.scene-item{
  display:flex;gap:14px;min-width:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow-sm);
}
.scene-mark{flex:0 0 8px;border-radius:999px;background:linear-gradient(180deg,#12a184,#0a6b57)}
.scene-item h3{font-size:16px;color:var(--ink);margin-bottom:6px;font-weight:700}
.scene-item p{font-size:14px;color:var(--muted);line-height:1.85}

/* steps */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:flow}
.flow-item{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 20px 20px;box-shadow:var(--shadow-sm);
}
.flow-item::before{
  counter-increment:flow;content:"0" counter(flow);
  display:block;font-size:22px;font-weight:800;color:#c6d3de;margin-bottom:10px;letter-spacing:1px;
}
.flow-item h3{font-size:16px;color:var(--ink);margin-bottom:8px;font-weight:700}
.flow-item p{font-size:14px;color:var(--muted);line-height:1.85}

/* resource */
.res-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.res-item{
  min-width:0;background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--brand);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.res-item:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.res-item h3{font-size:15.5px;color:var(--ink);margin-bottom:7px;font-weight:700}
.res-item p{font-size:13.8px;color:var(--muted);line-height:1.8}

/* safety */
.safety-box{
  display:grid;grid-template-columns:1fr 1fr;gap:12px 26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;box-shadow:var(--shadow-sm);
}
.safety-item{display:flex;gap:11px;min-width:0;font-size:14.5px;color:#3c4b59;line-height:1.85}
.safety-item::before{
  content:"";flex:0 0 18px;height:18px;margin-top:5px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,#0f8f74 0 42%,transparent 46%),#e6f6f1;
  border:1px solid #bcdfd5;
}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  transition:background .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#f6fafb}
.faq-item summary::after{content:"+";font-size:20px;font-weight:600;color:var(--brand);flex:0 0 auto}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.95}

/* news grid */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.news-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bfe0d6}
.news-card h3{font-size:16px;color:var(--ink);line-height:1.6;font-weight:700}
.news-card p{font-size:14px;color:var(--muted);line-height:1.8}

/* bookmark */
.bookmark-band{
  display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center;
  background:linear-gradient(150deg,#132c40,#0d1b2a);
  color:#e6eef4;border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);
}
.bookmark-band h2{font-size:23px;color:#fff;margin-bottom:10px;font-weight:800}
.bookmark-band p{font-size:14.5px;color:#b9cbd8;line-height:1.9}
.bookmark-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* final cta */
.final-cta{
  text-align:center;background:linear-gradient(140deg,#f2fbf8,#ffffff);
  border:1px solid #cfe6df;border-radius:var(--radius-lg);padding:44px 28px;
  box-shadow:var(--shadow-sm);
}
.final-cta h2{font-size:25px;color:var(--ink);font-weight:800;line-height:1.45}
.final-cta p{max-width:720px;margin:14px auto 24px;font-size:15px;color:var(--muted);line-height:1.95}
.final-cta .btn-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* empty */
.empty-tip{
  background:#f8fafc;border:1px dashed #cdd9e3;border-radius:var(--radius);
  padding:22px;color:var(--muted);font-size:14.5px;text-align:center;
}

/* footer */
.site-footer{background:#0b1826;color:#96a9b9;padding:52px 0 26px;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.09)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand .brand-mark{box-shadow:none}
.footer-brand strong{color:#fff;font-size:18px}
.footer-desc{font-size:14px;line-height:1.9;color:#8fa3b4;max-width:420px}
.footer-col h3{font-size:14.5px;color:#e4eef5;margin-bottom:14px;font-weight:700;letter-spacing:.5px}
.footer-col a,.footer-col span{display:block;font-size:14px;color:#93a7b7;padding:5px 0;transition:color .18s ease}
.footer-col a:hover{color:#4fe0b8}
.footer-bottom{padding-top:22px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#76889a}

@media (max-width:1024px){
  .hero h1{font-size:32px}
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .download-band{grid-template-columns:1fr;padding:26px}
  .pick-layout{grid-template-columns:1fr}
  .rail{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4,.flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3,.res-grid,.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bookmark-band{grid-template-columns:1fr}
  .bookmark-actions{justify-content:flex-start}
}
@media (max-width:768px){
  .section{padding:46px 0}
  .hero{padding:42px 0 48px}
  .hero h1{font-size:27px}
  .header-top{flex-wrap:wrap;padding-top:10px;padding-bottom:4px;min-height:0;gap:10px}
  .site-nav{width:100%;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
  .site-nav::-webkit-scrollbar{display:none}
  .nav-link{white-space:nowrap;font-size:14px;padding:8px 12px}
  .grid-2,.grid-3,.grid-4,.res-grid,.news-grid,.scene-list,.safety-box,.rail,.flow{grid-template-columns:1fr}
  .download-actions{grid-template-columns:1fr}
  .section-head h2{font-size:23px}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .rank-item{padding:14px 16px;gap:12px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .hero h1{font-size:23.5px}
  .hero-lead{font-size:15px}
  .brand-text strong{font-size:17px}
  .brand-text small{font-size:11px}
  .btn{padding:12px 18px;font-size:14.5px;width:100%}
  .hero-actions .btn{width:100%}
  .demo-panel{padding:18px}
  .final-cta{padding:32px 18px}
  .final-cta h2{font-size:21px}
  .bookmark-band{padding:24px}
  .pick-item{padding:16px}
}

/* roulang page: article */
:root{
  --brand:#0f8f74;
  --brand-dark:#0a6b57;
  --brand-soft:#e6f6f1;
  --ink:#0d1b2a;
  --ink-2:#132c40;
  --text:#1c2733;
  --muted:#61707f;
  --line:#e2e8ef;
  --bg:#f4f7fa;
  --surface:#ffffff;
  --warn:#c8822a;
  --warn-soft:#fdf4e6;
  --radius-lg:20px;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
  --shadow:0 14px 38px rgba(13,27,42,.10);
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-wrap:break-word;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4,p{margin:0}
.site-container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  color:#fff;font-size:19px;font-weight:700;letter-spacing:1px;
  box-shadow:0 6px 16px rgba(10,107,87,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:19px;letter-spacing:.5px;color:var(--ink)}
.brand-text small{font-size:12px;color:var(--muted);letter-spacing:.3px}
.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:#33414f;font-weight:500;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.nav-link:hover{background:#eef3f7;color:var(--brand-dark)}
.nav-link.is-active{color:var(--brand-dark);background:var(--brand-soft);font-weight:600}
.nav-cta{
  margin-left:6px;color:#fff;font-weight:600;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  box-shadow:0 8px 18px rgba(10,107,87,.22);
}
.nav-cta:hover{color:#fff;background:linear-gradient(150deg,#0f8f74,#085646);transform:translateY(-1px)}
.step-bar{
  display:flex;align-items:center;gap:8px;
  padding:0 0 12px;overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
}
.step-bar::-webkit-scrollbar{display:none}
.step-item{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  padding:6px 13px;border-radius:999px;
  background:#f1f5f9;border:1px solid var(--line);
  font-size:13px;color:#48586a;
  transition:border-color .18s ease,background .18s ease,color .18s ease;
}
.step-num{
  width:18px;height:18px;flex:0 0 18px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:#dbe5ee;color:#3f4f5f;font-size:11px;font-weight:700;
  transition:background .18s ease,color .18s ease;
}
.step-item:hover{border-color:#bcd8d0;background:var(--brand-soft);color:var(--brand-dark)}
.step-item:hover .step-num{background:#0f8f74;color:#fff}
/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(150deg,#13a888,#0a6b57);color:#fff;box-shadow:0 12px 26px rgba(9,90,74,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(9,90,74,.42);color:#fff}
.btn-primary:active{transform:translateY(0)}
.btn-line{background:#fff;color:var(--brand-dark);border-color:#cfe6df;box-shadow:var(--shadow-sm)}
.btn-line:hover{background:var(--brand-soft);transform:translateY(-2px);border-color:#a9d7c9}
.btn-ghost{background:rgba(255,255,255,.08);color:#e6f1f6;border-color:rgba(255,255,255,.26)}
.btn-ghost:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.46);color:#fff;transform:translateY(-2px)}
.btn:focus-visible,.nav-link:focus-visible,.step-item:focus-visible,.side-links a:focus-visible{
  outline:3px solid rgba(15,143,116,.38);outline-offset:2px;
}
/* article band */
.article-band{
  background:linear-gradient(180deg,#ffffff 0%,#f2f8f6 100%);
  border-bottom:1px solid var(--line);
  padding:30px 0 34px;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb a{color:var(--brand-dark);font-weight:600}
.crumb a:hover{text-decoration:underline;text-underline-offset:3px}
.crumb .sep{color:#b6c3cf}
.crumb .current{color:#48586a}
.article-band h1{
  margin-top:16px;
  font-size:32px;line-height:1.38;font-weight:800;letter-spacing:.3px;color:var(--ink);
  max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:#41505f;
  padding:5px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(13,27,42,.04);
}
.meta-chip strong{color:var(--ink);font-weight:700}
.meta-chip.tag{background:var(--brand-soft);border-color:#cbe7de;color:var(--brand-dark);font-weight:600}
/* layout */
.article-wrap{padding-top:42px;padding-bottom:56px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:34px;align-items:start}
.article-main{min-width:0}
.article-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);padding:34px 34px 10px;
}
.article-body{font-size:16.5px;line-height:1.95;color:#22303c;min-width:0}
.article-body h2{
  font-size:23px;line-height:1.5;font-weight:800;color:var(--ink);
  margin:34px 0 14px;padding-left:13px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:18px;line-height:1.6;font-weight:700;color:var(--ink-2);margin:24px 0 10px}
.article-body h4{font-size:16px;font-weight:700;color:var(--ink-2);margin:18px 0 8px}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin:7px 0}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand)}
.article-body blockquote{
  margin:20px 0;padding:15px 18px;
  background:var(--brand-soft);border-left:4px solid var(--brand);
  border-radius:0 12px 12px 0;color:#1b4a3f;font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;
  display:block;overflow-x:auto;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:#f3f7fa;color:var(--ink-2);font-weight:700;white-space:nowrap}
.article-body img{border-radius:12px;margin:18px 0}
.article-body code{
  background:#f1f5f9;border-radius:6px;padding:2px 6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.empty-state{padding:18px 0 30px}
.empty-state h2{border-left:0;padding-left:0;margin-top:0}
.empty-state p{color:var(--muted)}
/* extra blocks */
.article-extra{
  margin-top:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:28px 30px 30px;
}
.article-extra h2{font-size:22px;line-height:1.5;font-weight:800;color:var(--ink)}
.extra-lead{color:var(--muted);font-size:15px;margin-top:10px;margin-bottom:22px}
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.check-card{
  min-width:0;background:#f7fafc;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 16px 16px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,background .18s ease;
}
.check-card:hover{transform:translateY(-3px);border-color:#bde0d5;background:#fff;box-shadow:var(--shadow-sm)}
.check-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:9px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:800;
}
.check-card h3{font-size:16px;font-weight:700;color:var(--ink);margin:10px 0 6px}
.check-card p{font-size:14px;line-height:1.8;color:var(--muted)}
.discipline-list{display:grid;gap:12px}
.discipline-item{
  display:flex;gap:12px;align-items:flex-start;min-width:0;
  padding:14px 16px;background:#f7fafc;border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .18s ease,background .18s ease;
}
.discipline-item:hover{border-color:#c4e2d8;background:#fff}
.d-mark{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:800;
}
.discipline-item p{font-size:14.5px;line-height:1.8;color:#3d4d5c}
.discipline-item strong{color:var(--ink)}
.more-strip{
  margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  background:linear-gradient(120deg,#ffffff,#f0f8f5);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:18px 22px;box-shadow:var(--shadow-sm);
}
.more-strip span{font-size:14.5px;color:#41505f;min-width:0}
/* sidebar */
.article-side{min-width:0;display:grid;gap:18px;align-content:start;position:sticky;top:98px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow-sm);min-width:0;
}
.side-card h2{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:800;color:var(--ink)}
.side-card h2::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--brand);display:block}
.side-list{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:10px}
.side-list li{
  display:flex;gap:8px;font-size:14px;line-height:1.78;color:#41505f;min-width:0;
}
.side-list li::before{content:"·";color:var(--brand);font-weight:900;line-height:1.5}
.side-note{
  margin-top:14px;background:var(--warn-soft);border:1px solid #f0dfc0;
  border-radius:var(--radius);padding:13px 14px;
  font-size:13.5px;line-height:1.8;color:#7a5520;
}
.calc-box{margin-top:14px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.calc-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;font-size:14px;color:#556473;border-bottom:1px solid #f1f5f8;
}
.calc-row:last-child{border-bottom:0}
.calc-row strong{font-size:15px;color:var(--ink);font-weight:700;white-space:nowrap}
.side-links{display:grid;gap:9px;margin-top:14px}
.side-links a{
  display:block;font-size:14px;font-weight:600;color:var(--brand-dark);
  padding:9px 13px;border-radius:10px;background:#f4f8fa;border:1px solid var(--line);
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.side-links a:hover{background:var(--brand-soft);border-color:#c8e5dc;transform:translateX(2px)}
/* download */
.download-section{
  background:
    radial-gradient(900px 420px at 84% -20%,rgba(18,161,132,.32),transparent 62%),
    linear-gradient(152deg,#0d1b2a 0%,#122c40 60%,#0d2436 100%);
  color:#e9f1f6;padding:56px 0 60px;
}
.dl-head h2{font-size:26px;line-height:1.45;font-weight:800;color:#fff}
.dl-head p{margin-top:12px;max-width:680px;font-size:15px;line-height:1.85;color:#b9cbd8}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:28px}
.dl-card{
  min-width:0;display:flex;flex-direction:column;gap:12px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius-lg);padding:22px;
  transition:transform .18s ease,background .18s ease,border-color .18s ease;
}
.dl-card:hover{transform:translateY(-3px);background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.3)}
.dl-name{font-size:16px;font-weight:700;color:#fff}
.dl-file{font-size:12.5px;color:#9fb6c6;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all}
.dl-card .btn{width:100%;margin-top:auto}
.dl-foot{margin-top:20px;font-size:13px;color:#93aaba;line-height:1.8}
/* footer */
.site-footer{background:#0b1723;color:#b8c7d4;padding:48px 0 24px;font-size:14px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{color:#fff;font-size:18px;letter-spacing:.5px}
.footer-desc{color:#93a6b6;line-height:1.85;font-size:13.5px;max-width:520px}
.footer-col h3{font-size:14px;color:#fff;margin-bottom:14px;font-weight:700;letter-spacing:.5px}
.footer-col a{display:block;color:#9db0c0;font-size:14px;padding:5px 0;transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:#4fe0b8;transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:20px;font-size:13px;color:#7f93a5;
}
/* responsive */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .article-band{padding:24px 0 28px}
  .article-band h1{font-size:25px}
  .article-card{padding:22px 18px 6px}
  .article-extra{padding:22px 18px 24px}
  .article-body{font-size:16px;line-height:1.9}
  .article-body h2{font-size:20px}
  .article-side{grid-template-columns:minmax(0,1fr)}
  .download-section{padding:44px 0 48px}
  .dl-head h2{font-size:22px}
  .more-strip{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .header-top{flex-wrap:wrap;padding:10px 0;gap:10px}
  .brand-mark{width:36px;height:36px;flex-basis:36px;font-size:17px;border-radius:10px}
  .brand-text strong{font-size:17px}
  .brand-text small{font-size:11px}
  .site-nav{gap:4px;width:100%;justify-content:flex-start}
  .nav-link{padding:8px 11px;font-size:14px}
  .nav-cta{margin-left:0}
  .article-band h1{font-size:21px;line-height:1.45}
  .article-meta{gap:8px}
  .meta-chip{font-size:12px;padding:4px 11px}
  .check-grid{grid-template-columns:minmax(0,1fr)}
  .dl-grid{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:24px}
  .article-body table{font-size:14px}
}

/* roulang page: category1 */
:root{
  --brand:#0f8f74;
  --brand-dark:#0a6b57;
  --brand-soft:#e6f6f1;
  --ink:#0d1b2a;
  --ink-2:#132c40;
  --text:#1c2733;
  --muted:#61707f;
  --line:#e2e8ef;
  --bg:#f4f7fa;
  --surface:#ffffff;
  --warn:#c8822a;
  --warn-soft:#fdf4e6;
  --radius-lg:20px;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
  --shadow:0 14px 38px rgba(13,27,42,.10);
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-wrap:break-word;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.site-container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  color:#fff;font-size:19px;font-weight:700;letter-spacing:1px;
  box-shadow:0 6px 16px rgba(10,107,87,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:19px;letter-spacing:.5px;color:var(--ink)}
.brand-text small{font-size:12px;color:var(--muted);letter-spacing:.3px}
.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:#33414f;font-weight:500;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.nav-link:hover{background:#eef3f7;color:var(--brand-dark)}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.nav-link.is-active{color:var(--brand-dark);background:var(--brand-soft);font-weight:600}
.nav-cta{
  margin-left:6px;color:#fff;font-weight:600;
  background:linear-gradient(150deg,#12a184,#0a6b57);
  box-shadow:0 8px 18px rgba(10,107,87,.22);
}
.nav-cta:hover{color:#fff;background:linear-gradient(150deg,#0f8f74,#085646);transform:translateY(-1px)}
.step-bar{display:flex;flex-wrap:wrap;gap:8px;padding:9px 0 11px;overflow-x:auto}
.step-item{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  padding:6px 13px;border-radius:999px;
  background:#f1f5f9;border:1px solid var(--line);
  font-size:13px;color:#48586a;
  transition:border-color .18s ease,background .18s ease,color .18s ease;
}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:19px;height:19px;border-radius:50%;
  background:#dbe5ec;color:#3c4c5c;font-size:12px;font-weight:700;
  transition:background .18s ease,color .18s ease;
}
.step-item:hover{border-color:#bcd8d0;background:var(--brand-soft);color:var(--brand-dark)}
.step-item:hover .step-num{background:#0f8f74;color:#fff}
/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.btn-primary{background:linear-gradient(150deg,#13a888,#0a6b57);color:#fff;box-shadow:0 12px 26px rgba(9,90,74,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(9,90,74,.4)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.08);color:#e6f1f6;border-color:rgba(255,255,255,.26)}
.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.44)}
.btn-line{background:#fff;color:var(--brand-dark);border-color:#cfe6df;box-shadow:var(--shadow-sm)}
.btn-line:hover{background:var(--brand-soft);transform:translateY(-2px)}
/* category hero */
.cat-hero{
  position:relative;
  background:
    radial-gradient(900px 460px at 84% -14%,rgba(18,161,132,.32),transparent 62%),
    radial-gradient(700px 420px at 0% 110%,rgba(37,86,128,.4),transparent 64%),
    linear-gradient(158deg,#0d1b2a 0%,#122c40 58%,#0d2436 100%);
  color:#e9f1f6;
  padding:52px 0 58px;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 80%);
}
.cat-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:38px;align-items:center}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:#9fb6c6;margin-bottom:16px}
.breadcrumb a{color:#c6d7e2}
.breadcrumb a:hover{color:#4fe0b8}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.18);
  font-size:13px;letter-spacing:.6px;color:#c6f0e4;
}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:#3fdcb4;display:inline-block}
.cat-hero h1{
  margin:18px 0 16px;
  font-size:34px;line-height:1.32;letter-spacing:.4px;font-weight:800;color:#fff;
}
.cat-hero h1 em{font-style:normal;color:#4fe0b8}
.hero-lead{font-size:15.5px;line-height:1.9;color:#c2d2de;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.fact-pill{
  padding:7px 14px;border-radius:10px;font-size:13px;color:#bfd3e0;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
}
/* hero panel */
.hero-panel{
  background:#fff;color:var(--text);
  border-radius:var(--radius-lg);
  box-shadow:0 24px 50px rgba(4,20,32,.34);
  padding:20px 20px 16px;
  min-width:0;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.panel-head h2{font-size:15.5px;font-weight:800;color:var(--ink)}
.panel-tag{font-size:12px;color:var(--warn);background:var(--warn-soft);border:1px solid #f3ddb9;padding:3px 10px;border-radius:999px;white-space:nowrap}
.panel-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid #f1f5f8;font-size:13.5px;color:#556473}
.panel-row:last-of-type{border-bottom:none}
.panel-row strong{font-size:15.5px;color:var(--ink);font-weight:800}
.panel-note{font-size:12.5px;color:var(--muted);line-height:1.7;margin-top:10px;padding-top:10px;border-top:1px dashed #e4ebf1}
/* sections */
.section{padding:60px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:820px;margin-bottom:32px}
.section-kicker{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:1.4px;
  color:var(--brand-dark);background:var(--brand-soft);
  padding:5px 12px;border-radius:8px;margin-bottom:14px;
}
.section-head h2{font-size:26px;line-height:1.42;font-weight:800;letter-spacing:.3px}
.section-head p{margin-top:12px;color:var(--muted);font-size:15px}
/* grid */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3 > *,.grid-2 > *{min-width:0}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.info-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe6df}
.card-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:9px;margin-bottom:14px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:14px;font-weight:800;
}
.info-card h3{font-size:17.5px;font-weight:800;margin-bottom:10px}
.info-card p{font-size:14.5px;color:var(--muted);line-height:1.85}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  display:inline-block;font-size:12.5px;color:#3c5c53;
  background:#eef6f3;border:1px solid #d5eae2;border-radius:999px;padding:3px 11px;
}
/* table */
.table-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow-x:auto;
}
table.calc-table{width:100%;border-collapse:collapse;min-width:520px;font-size:14.5px}
table.calc-table caption{
  text-align:left;padding:16px 20px 4px;font-size:14px;color:var(--muted);
}
table.calc-table th,table.calc-table td{padding:13px 20px;text-align:left;border-bottom:1px solid #eef2f6;white-space:nowrap}
table.calc-table th{background:#f7fafc;color:#3c4c5c;font-weight:700;font-size:13.5px;letter-spacing:.4px}
table.calc-table tbody tr:hover{background:#f8fbfd}
table.calc-table td strong{color:var(--ink);font-weight:800}
table.calc-table tbody tr:last-child td{border-bottom:none}
/* list block */
.check-list{display:grid;gap:12px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow-sm);min-width:0;
}
.check-dot{
  flex:0 0 10px;width:10px;height:10px;border-radius:50%;
  background:linear-gradient(150deg,#13a888,#0a6b57);margin-top:9px;
}
.check-item h4{font-size:15.5px;font-weight:800;margin-bottom:5px}
.check-item p{font-size:14px;color:var(--muted);line-height:1.8}
/* steps */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.flow-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,transform .2s ease;min-width:0;
}
.flow-card:hover{border-color:#cfe6df;transform:translateY(-3px)}
.flow-num{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:1px;
  color:var(--brand-dark);background:var(--brand-soft);border-radius:7px;padding:4px 10px;margin-bottom:12px;
}
.flow-card h3{font-size:16px;font-weight:800;margin-bottom:8px}
.flow-card p{font-size:14px;color:var(--muted);line-height:1.8}
/* compare */
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);min-width:0;
}
.compare-card h3{font-size:16.5px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.compare-card.highlight{border-color:#f0dcc0;background:#fffdf8}
.dot-bad{width:9px;height:9px;border-radius:50%;background:#d4705f;display:inline-block}
.dot-good{width:9px;height:9px;border-radius:50%;background:#0f8f74;display:inline-block}
.compare-card li{
  position:relative;padding-left:20px;font-size:14.5px;color:#4a5a68;
  line-height:1.85;margin-bottom:10px;
}
.compare-card li:last-child{margin-bottom:0}
.compare-card li::before{
  content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;
  background:#c3d1dc;
}
/* faq */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  transition:background .18s ease,color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:700;color:var(--brand);line-height:1;flex:0 0 auto;
}
.faq-item[open] summary{background:var(--brand-soft);color:var(--brand-dark)}
.faq-item[open] summary::after{content:"–"}
.faq-item summary:hover{background:#f5f9fb}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-body{padding:6px 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.9}
/* posts */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-grid > *{min-width:0}
.post-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe6df}
.post-card h3{font-size:16px;font-weight:800;line-height:1.6;color:var(--ink)}
.post-card p{font-size:14px;color:var(--muted);line-height:1.85}
.post-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:#7b8a98;margin-top:auto;padding-top:8px}
.post-meta .chip{
  background:#f1f5f9;border:1px solid #e4ebf1;border-radius:999px;padding:2px 10px;color:#4c5d6d;
}
.list-empty{
  background:var(--surface);border:1px dashed #cfdbe5;border-radius:var(--radius);
  padding:26px 22px;color:var(--muted);font-size:14.5px;
}
/* download */
.download-zone{
  background:linear-gradient(158deg,#0d1b2a,#122c40 62%,#0c2b28);
  color:#e9f1f6;border-radius:var(--radius-lg);
  padding:40px 34px;box-shadow:var(--shadow);
  display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;
}
.download-zone h2{color:#fff;font-size:25px;font-weight:800;letter-spacing:.3px}
.download-zone p{color:#bfd3e0;font-size:14.5px;line-height:1.9;margin-top:12px}
.dl-actions{display:grid;gap:12px}
.dl-btn{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.2);
  border-radius:12px;padding:14px 18px;color:#eef7f4;font-size:15px;font-weight:600;
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.dl-btn span.file{font-size:12.5px;color:#9fc0d1;font-weight:500;letter-spacing:.4px}
.dl-btn:hover{background:rgba(79,224,184,.16);border-color:rgba(79,224,184,.5);transform:translateY(-2px);color:#fff}
.dl-btn:focus-visible{outline:2px solid #4fe0b8;outline-offset:3px}
/* footer */
.site-footer{background:#0b1926;color:#b9c9d6;padding:48px 0 26px;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand strong{font-size:18px;color:#fff;letter-spacing:.6px}
.footer-desc{font-size:13.5px;line-height:1.9;color:#8fa4b4;max-width:520px}
.footer-col h3{font-size:14px;color:#fff;font-weight:700;margin-bottom:14px;letter-spacing:.6px}
.footer-col a{display:block;font-size:13.5px;color:#9db1c1;padding:5px 0;transition:color .18s ease}
.footer-col a:hover{color:#4fe0b8}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12.5px;color:#7b8f9f;
}
@media (max-width:1024px){
  .cat-hero-inner{grid-template-columns:1fr;gap:30px}
  .cat-hero h1{font-size:30px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-zone{grid-template-columns:1fr;padding:34px 26px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .header-top{flex-wrap:wrap;padding-bottom:6px;min-height:auto;align-items:flex-start;padding-top:10px}
  .site-nav{width:100%;justify-content:flex-start}
  .nav-cta{margin-left:0}
  .grid-2{grid-template-columns:1fr}
  .section{padding:44px 0}
  .section-head h2{font-size:22px}
  .cat-hero{padding:38px 0 44px}
  .cat-hero h1{font-size:26px}
  .hero-panel{padding:18px 16px 14px}
  .download-zone h2{font-size:22px}
  .footer-top{grid-template-columns:1fr;gap:24px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .grid-3{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .cat-hero h1{font-size:23px}
  .hero-actions .btn{width:100%}
  .download-zone{padding:28px 18px}
  .dl-btn{flex-direction:column;align-items:flex-start;gap:4px}
}