/* roulang page: index */
:root{
  --bg:#f4f7fb;
  --bg-soft:#eef3f8;
  --panel:#ffffff;
  --panel-2:#f8fbfd;
  --panel-3:#eaf8f5;
  --text:#122033;
  --muted:#5f7089;
  --line:#dbe5ef;
  --line-strong:#c8d4e1;
  --accent:#16b6a4;
  --accent-2:#7769ff;
  --accent-3:#ffb84d;
  --danger:#ef5f6c;
  --shadow:0 18px 50px rgba(15, 28, 44, .08);
  --shadow-soft:0 10px 24px rgba(15, 28, 44, .05);
  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --space-1:6px;
  --space-2:10px;
  --space-3:14px;
  --space-4:18px;
  --space-5:24px;
  --space-6:32px;
  --space-7:44px;
  --space-8:60px;
  --container:1220px;
  --transition:.22s ease;
  color-scheme: light;
}
*,
*::before,
*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 800px at 12% -10%, rgba(22,182,164,.16), transparent 50%),
    radial-gradient(900px 700px at 108% 8%, rgba(119,105,255,.11), transparent 40%),
    linear-gradient(180deg, #f7f9fc 0%, #eef3f8 100%);
  line-height:1.7;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
body::before,
body::after{
  content:"";
  position:fixed;
  inset:auto;
  border-radius:50%;
  pointer-events:none;
  z-index:-1;
  filter:blur(12px);
}
body::before{
  width:240px;height:240px;left:-80px;top:120px;
  background:rgba(22,182,164,.08);
}
body::after{
  width:320px;height:320px;right:-130px;bottom:80px;
  background:rgba(255,184,77,.08);
}
a{
  color:inherit;
  text-decoration:none;
  transition:color var(--transition), transform var(--transition), opacity var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}
img{max-width:100%;display:block;}
button,input,select,textarea{
  font:inherit;
  color:inherit;
}
button{
  cursor:pointer;
}
::selection{
  background:rgba(22,182,164,.18);
}
.container{
  width:min(var(--container), calc(100% - 32px));
  margin-inline:auto;
}
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  backdrop-filter:blur(16px);
  background:rgba(247,250,252,.84);
  border-bottom:1px solid rgba(219,229,239,.92);
}
.header-inner{
  display:grid;
  grid-template-columns:auto minmax(280px, 1fr) auto;
  gap:var(--space-4);
  align-items:center;
  min-height:78px;
  padding-block:12px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  font-weight:800;
  letter-spacing:.01em;
}
.brand-mark{
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border-radius:14px;
  color:#fff;
  background:linear-gradient(135deg, var(--accent), #28d1bd 44%, var(--accent-2) 100%);
  box-shadow:0 12px 26px rgba(22,182,164,.28);
  flex:none;
}
.brand-text{
  font-size:16px;
  line-height:1.15;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.search-form{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px;
  border-radius:999px;
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.86);
  box-shadow:0 10px 30px rgba(13,31,50,.04);
}
.search-form:focus-within{
  border-color:rgba(22,182,164,.55);
  box-shadow:0 0 0 4px rgba(22,182,164,.12), 0 14px 36px rgba(13,31,50,.06);
}
.search-form input{
  flex:1;
  min-width:0;
  border:0;
  outline:none;
  background:transparent;
  color:var(--text);
}
.search-form input::placeholder{color:#7a8ca6;}
.search-btn{
  border:0;
  border-radius:999px;
  padding:10px 18px;
  background:linear-gradient(135deg, var(--accent), #21c2ae);
  color:#fff;
  font-weight:700;
  box-shadow:0 10px 20px rgba(22,182,164,.22);
}
.search-btn:hover{transform:translateY(-1px);box-shadow:0 14px 22px rgba(22,182,164,.26);}
.search-btn:active{transform:translateY(0);}
.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
}
.switcher{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px;
  border-radius:999px;
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.88);
}
.switch-pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:34px;
  padding:0 14px;
  border-radius:999px;
  color:var(--muted);
  font-size:13px;
  font-weight:700;
}
.switch-pill.active{
  color:#0f2940;
  background:linear-gradient(180deg, #f6fcfb, #eafaf7);
  box-shadow:inset 0 0 0 1px rgba(22,182,164,.18);
}
.menu-toggle{
  display:none;
}
.mobile-index{
  display:none;
}
.page-shell{
  display:grid;
  grid-template-columns:240px minmax(0, 1fr);
  gap:28px;
  padding-top:28px;
  padding-bottom:40px;
}
.doc-aside{
  position:sticky;
  top:102px;
  align-self:start;
  display:grid;
  gap:16px;
}
.aside-card{
  padding:20px;
  border-radius:var(--radius-xl);
  border:1px solid rgba(219,229,239,.92);
  background:rgba(255,255,255,.86);
  box-shadow:var(--shadow-soft);
}
.aside-card.accent{
  background:
    linear-gradient(180deg, rgba(22,182,164,.12), rgba(255,255,255,.92)),
    rgba(255,255,255,.88);
}
.aside-kicker{
  margin:0 0 10px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
  text-transform:uppercase;
}
.aside-title{
  margin:0;
  font-size:18px;
  font-weight:800;
}
.aside-nav{
  display:grid;
  gap:8px;
}
.aside-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  border-radius:14px;
  color:#22354d;
  background:transparent;
  border:1px solid transparent;
}
.aside-nav a::after{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:#b7c5d5;
  box-shadow:0 0 0 4px rgba(183,197,213,.16);
  flex:none;
}
.aside-nav a:hover{
  border-color:rgba(22,182,164,.24);
  background:rgba(22,182,164,.06);
  transform:translateX(2px);
}
.aside-metric{
  display:grid;
  gap:6px;
}
.aside-metric strong{
  font-size:30px;
  line-height:1;
  letter-spacing:-.03em;
}
.aside-metric span{
  color:var(--muted);
  font-size:14px;
}
.content-stack{
  display:grid;
  gap:24px;
  min-width:0;
}
.section{
  padding:28px;
  border:1px solid rgba(219,229,239,.92);
  border-radius:var(--radius-xl);
  background:rgba(255,255,255,.82);
  box-shadow:var(--shadow-soft);
}
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:20px;
  margin-bottom:22px;
}
.section-kicker{
  margin:0 0 10px;
  color:var(--accent);
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.section h2{
  margin:0;
  font-size:28px;
  line-height:1.15;
  letter-spacing:-.03em;
}
.section-lead{
  margin:10px 0 0;
  color:var(--muted);
  max-width:70ch;
}
.hero{
  position:relative;
  overflow:hidden;
  border:none;
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.76)),
    linear-gradient(135deg, rgba(22,182,164,.08), rgba(119,105,255,.06));
}
.hero::before{
  content:"";
  position:absolute;
  inset:-1px;
  border-radius:inherit;
  padding:1px;
  background:linear-gradient(135deg, rgba(22,182,164,.55), rgba(119,105,255,.38), rgba(255,184,77,.3));
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite:exclude;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0, 1.18fr) minmax(320px, .82fr);
  gap:28px;
  align-items:center;
}
.hero-copy{
  padding-right:6px;
}
.hero-badges{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:18px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:32px;
  padding:0 12px;
  border-radius:999px;
  border:1px solid rgba(22,182,164,.16);
  background:rgba(22,182,164,.08);
  color:#0d5f58;
  font-size:13px;
  font-weight:700;
}
.badge.alt{
  border-color:rgba(119,105,255,.16);
  background:rgba(119,105,255,.08);
  color:#564dd5;
}
.badge.warn{
  border-color:rgba(255,184,77,.18);
  background:rgba(255,184,77,.12);
  color:#9c6400;
}
.hero h1{
  margin:0;
  font-size:clamp(34px, 5vw, 58px);
  line-height:1.04;
  letter-spacing:-.05em;
}
.hero-subtitle{
  margin:18px 0 0;
  max-width:62ch;
  color:var(--muted);
  font-size:17px;
}
.search-box{
  margin-top:24px;
  display:grid;
  gap:14px;
}
.search-panel{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px;
  border-radius:24px;
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.92);
  box-shadow:0 14px 36px rgba(12,26,42,.05);
}
.search-panel svg{
  flex:none;
  color:var(--accent);
}
.search-panel input{
  flex:1;
  min-width:0;
  border:0;
  outline:none;
  background:transparent;
  font-size:16px;
}
.search-panel input::placeholder{color:#7c8da6;}
.action-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
}
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 18px;
  border-radius:999px;
  border:1px solid transparent;
  font-weight:800;
  white-space:nowrap;
  cursor:pointer;
}
.button.primary{
  color:#fff;
  background:linear-gradient(135deg, var(--accent), #1fc5b2);
  box-shadow:0 14px 26px rgba(22,182,164,.24);
}
.button.primary:hover{transform:translateY(-1px);box-shadow:0 18px 28px rgba(22,182,164,.28);}
.button.secondary{
  color:#153149;
  border-color:rgba(22,182,164,.16);
  background:rgba(255,255,255,.85);
}
.button.secondary:hover{
  border-color:rgba(22,182,164,.32);
  background:rgba(22,182,164,.06);
  transform:translateY(-1px);
}
.button.ghost{
  color:#53667d;
  border-color:rgba(219,229,239,.96);
  background:rgba(255,255,255,.72);
}
.button:focus,
.search-btn:focus,
.search-form input:focus,
.menu-toggle:focus,
.mobile-index summary:focus,
.feed-item:focus{
  outline:none;
  box-shadow:0 0 0 4px rgba(22,182,164,.16);
}
.hero-note{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
  color:var(--muted);
  font-size:14px;
}
.hero-stage{
  display:grid;
  gap:16px;
  padding:18px;
  border-radius:26px;
  border:1px solid rgba(219,229,239,.95);
  background:
    linear-gradient(180deg, rgba(255,255,255,.94), rgba(247,251,253,.92));
  box-shadow:var(--shadow);
}
.hero-stage-top{
  display:flex;
  justify-content:space-between;
  gap:16px;
  align-items:flex-start;
}
.stage-title{
  margin:0;
  font-size:18px;
  font-weight:800;
}
.stage-subtitle{
  margin:4px 0 0;
  color:var(--muted);
  font-size:13px;
}
.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background:rgba(22,182,164,.1);
  color:#0d6a61;
  font-size:13px;
  font-weight:700;
  white-space:nowrap;
}
.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(22,182,164,.15);
}
.hero-mini-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:12px;
}
.mini-card{
  padding:14px;
  border-radius:18px;
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.92);
}
.mini-card strong{
  display:block;
  font-size:24px;
  line-height:1.1;
  letter-spacing:-.04em;
}
.mini-card span{
  display:block;
  margin-top:6px;
  color:var(--muted);
  font-size:13px;
}
.mini-wide{
  grid-column:1 / -1;
}
.timeline{
  display:grid;
  gap:12px;
}
.timeline-item{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:12px 0;
  border-top:1px dashed rgba(219,229,239,.95);
}
.timeline-item:first-child{
  border-top:0;
  padding-top:0;
}
.timeline-step{
  width:28px;
  height:28px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:13px;
  font-weight:800;
  color:#0f4f48;
  background:rgba(22,182,164,.12);
  flex:none;
}
.timeline-item p{
  margin:0;
  color:var(--muted);
  font-size:14px;
}
.timeline-item strong{
  display:block;
  color:var(--text);
  font-size:15px;
  margin-bottom:4px;
}
.grid-3{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:16px;
}
.grid-4{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:16px;
}
.panel-card{
  padding:22px;
  border-radius:22px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(249,252,254,.96));
  box-shadow:0 10px 24px rgba(16,31,48,.04);
}
.panel-card:hover{
  transform:translateY(-2px);
  box-shadow:0 18px 30px rgba(16,31,48,.07);
}
.panel-card h3{
  margin:0 0 10px;
  font-size:18px;
  line-height:1.25;
}
.panel-card p{
  margin:0;
  color:var(--muted);
  font-size:14px;
}
.panel-icon{
  width:40px;
  height:40px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, rgba(22,182,164,.16), rgba(119,105,255,.1));
  color:#155f57;
  margin-bottom:14px;
  font-size:18px;
}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}
.tag{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  padding:0 10px;
  border-radius:999px;
  background:rgba(15,35,54,.05);
  color:#4a5d75;
  font-size:12px;
  font-weight:700;
}
.tag.accent{
  background:rgba(22,182,164,.1);
  color:#0d6f62;
}
.tag.warn{
  background:rgba(255,184,77,.12);
  color:#9c6400;
}
.split-layout{
  display:grid;
  grid-template-columns:minmax(0, 1fr) 340px;
  gap:18px;
  align-items:start;
}
.compare-table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  overflow:hidden;
  border-radius:20px;
  border:1px solid rgba(219,229,239,.95);
  background:#fff;
}
.compare-table th,
.compare-table td{
  padding:16px 18px;
  text-align:left;
  border-bottom:1px solid rgba(219,229,239,.78);
  vertical-align:top;
}
.compare-table th{
  background:linear-gradient(180deg, rgba(248,251,253,.98), rgba(241,246,250,.98));
  font-size:14px;
}
.compare-table td{
  color:var(--muted);
  font-size:14px;
}
.compare-table tr:last-child td{border-bottom:0;}
.compare-table .check{
  color:#0e6f63;
  font-weight:700;
}
.compare-table .soft{
  color:#6e8198;
}
.side-stack{
  display:grid;
  gap:16px;
}
.side-box{
  padding:20px;
  border-radius:22px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.96));
}
.side-box h3{
  margin:0 0 10px;
  font-size:18px;
}
.side-box p{
  margin:0;
  color:var(--muted);
  font-size:14px;
}
.side-list{
  margin:16px 0 0;
  padding:0;
  list-style:none;
  display:grid;
  gap:10px;
}
.side-list li{
  display:flex;
  align-items:center;
  gap:10px;
  color:#32465f;
  font-size:14px;
}
.side-list li::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(22,182,164,.12);
  flex:none;
}
.tier-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:16px;
}
.tier-card{
  position:relative;
  padding:22px;
  border-radius:24px;
  border:1px solid rgba(219,229,239,.94);
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.98));
  overflow:hidden;
}
.tier-card.featured{
  border-color:rgba(22,182,164,.28);
  box-shadow:0 18px 36px rgba(22,182,164,.08);
}
.tier-card.featured::before{
  content:"";
  position:absolute;
  inset:auto -30px -30px auto;
  width:120px;
  height:120px;
  border-radius:50%;
  background:rgba(22,182,164,.12);
  filter:blur(4px);
}
.tier-label{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  background:rgba(22,182,164,.1);
  color:#0d6f62;
  font-size:12px;
  font-weight:800;
}
.tier-card h3{
  margin:14px 0 10px;
  font-size:20px;
}
.tier-card p{
  margin:0;
  color:var(--muted);
  font-size:14px;
}
.tier-list{
  margin:16px 0 18px;
  padding:0;
  list-style:none;
  display:grid;
  gap:10px;
}
.tier-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  color:#32465f;
  font-size:14px;
}
.tier-list li::before{
  content:"✓";
  color:var(--accent);
  font-weight:900;
  flex:none;
}
.proof-grid{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:16px;
  margin-bottom:18px;
}
.metric-card{
  padding:22px;
  border-radius:22px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.96));
}
.metric-card strong{
  display:block;
  font-size:30px;
  line-height:1;
  letter-spacing:-.04em;
}
.metric-card span{
  display:block;
  margin-top:8px;
  color:var(--muted);
  font-size:14px;
}
.progress-card{
  padding:22px;
  border-radius:24px;
  border:1px solid rgba(219,229,239,.94);
  background:
    linear-gradient(135deg, rgba(22,182,164,.08), rgba(255,255,255,.97) 50%, rgba(119,105,255,.06));
}
.progress-head{
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:flex-end;
  margin-bottom:14px;
}
.progress-head h3{
  margin:0;
  font-size:18px;
}
.progress-head span{
  color:var(--muted);
  font-size:13px;
}
.progress-item{
  display:grid;
  gap:10px;
  margin-top:12px;
}
.progress-item:first-of-type{margin-top:0;}
.progress-row{
  display:flex;
  justify-content:space-between;
  gap:16px;
  color:#34475f;
  font-size:14px;
}
.progress-bar{
  height:10px;
  border-radius:999px;
  background:#e5edf5;
  overflow:hidden;
}
.progress-bar > span{
  display:block;
  height:100%;
  border-radius:inherit;
  background:linear-gradient(90deg, var(--accent), #2ed6be);
}
.testimonial-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:16px;
}
.quote-card{
  padding:22px;
  border-radius:24px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.96));
}
.quote-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.avatar{
  width:44px;
  height:44px;
  border-radius:50%;
  display:grid;
  place-items:center;
  color:#fff;
  font-weight:800;
  background:linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow:0 10px 20px rgba(119,105,255,.18);
  flex:none;
}
.quote-head strong{
  display:block;
  font-size:15px;
}
.quote-head span{
  color:var(--muted);
  font-size:13px;
}
.quote-card p{
  margin:0;
  color:#3d5068;
  font-size:15px;
}
.updates-layout{
  display:grid;
  grid-template-columns:minmax(0, 1fr) 280px;
  gap:16px;
  align-items:start;
}
.feed-list{
  display:grid;
  gap:14px;
}
.feed-item{
  display:block;
  padding:18px;
  border-radius:22px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.96));
  box-shadow:0 8px 18px rgba(16,31,48,.03);
}
.feed-item:hover{
  transform:translateY(-2px);
  border-color:rgba(22,182,164,.28);
  box-shadow:0 16px 30px rgba(16,31,48,.06);
}
.feed-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
  margin-bottom:10px;
}
.feed-cat,
.feed-time{
  display:inline-flex;
  align-items:center;
  min-height:26px;
  padding:0 10px;
  border-radius:999px;
  background:rgba(15,35,54,.05);
  color:#587089;
  font-size:12px;
  font-weight:700;
}
.feed-cat{
  background:rgba(22,182,164,.1);
  color:#0d6f62;
}
.feed-item h3{
  margin:0;
  font-size:18px;
  line-height:1.35;
}
.feed-item p{
  margin:10px 0 14px;
  color:var(--muted);
  font-size:14px;
}
.feed-link{
  color:var(--accent);
  font-weight:800;
  font-size:14px;
}
.feed-side{
  display:grid;
  gap:16px;
}
.feed-panel{
  padding:20px;
  border-radius:22px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.96));
}
.feed-panel h3{
  margin:0 0 10px;
  font-size:18px;
}
.feed-panel p{
  margin:0;
  color:var(--muted);
  font-size:14px;
}
.chip-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
}
.chip-tag{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:0 12px;
  border-radius:999px;
  background:rgba(22,182,164,.08);
  color:#0d6f62;
  font-size:12px;
  font-weight:800;
}
.empty-state{
  padding:24px;
  border-radius:22px;
  border:1px dashed rgba(171,186,203,.9);
  background:rgba(255,255,255,.72);
  color:var(--muted);
  text-align:center;
}
.faq-list{
  display:grid;
  gap:12px;
}
.faq-item{
  border-radius:20px;
  border:1px solid rgba(219,229,239,.94);
  background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,253,.97));
  overflow:hidden;
}
.faq-item summary{
  list-style:none;
  display:flex;
  justify-content:space-between;
  gap:16px;
  align-items:center;
  padding:18px 20px;
  cursor:pointer;
  font-weight:800;
  color:#203246;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  width:26px;
  height:26px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:rgba(22,182,164,.1);
  color:#0d6f62;
  transition:transform var(--transition), background-color var(--transition);
  flex:none;
}
.faq-item[open] summary::after{
  content:"–";
  background:rgba(119,105,255,.1);
  color:#5c53db;
}
.faq-body{
  padding:0 20px 18px;
  color:var(--muted);
}
.faq-body p{
  margin:0;
}
.cta-band{
  position:relative;
  overflow:hidden;
  border:none;
  background:
    linear-gradient(135deg, rgba(22,182,164,.12), rgba(119,105,255,.08), rgba(255,255,255,.92));
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:auto -100px -100px auto;
  width:260px;
  height:260px;
  border-radius:50%;
  background:rgba(255,184,77,.16);
  filter:blur(8px);
}
.cta-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0, 1fr) auto;
  gap:18px;
  align-items:center;
}
.cta-grid h2{
  margin:0;
  font-size:30px;
  line-height:1.15;
}
.cta-grid p{
  margin:12px 0 0;
  color:var(--muted);
  max-width:60ch;
}
.cta-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  align-items:center;
}
.site-footer{
  padding:24px 0 36px;
}
.footer-inner{
  border-top:1px solid rgba(219,229,239,.95);
  padding-top:22px;
  display:grid;
  grid-template-columns:minmax(0, 1.2fr) auto;
  gap:18px;
  align-items:start;
}
.footer-brand{
  display:grid;
  gap:10px;
}
.footer-brand strong{
  font-size:18px;
}
.footer-brand p{
  margin:0;
  color:var(--muted);
  max-width:56ch;
  font-size:14px;
}
.footer-links{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:10px 18px;
}
.footer-links a{
  color:#34475f;
  font-size:14px;
}
.footer-links a:hover{
  color:var(--accent);
}
.footer-meta{
  margin-top:14px;
  color:#6b7f97;
  font-size:13px;
}
.feed-topline{
  display:flex;
  justify-content:space-between;
  gap:18px;
  align-items:flex-end;
  margin-bottom:16px;
}
.note-line{
  color:var(--muted);
  font-size:14px;
}
hr.divider{
  border:0;
  border-top:1px solid rgba(219,229,239,.95);
  margin:0;
}
.table-wrap{
  overflow:auto;
  border-radius:20px;
}
.table-wrap::-webkit-scrollbar{height:10px;}
.table-wrap::-webkit-scrollbar-thumb{
  background:#c9d6e3;
  border-radius:999px;
}
@media (max-width: 1180px){
  .page-shell{
    grid-template-columns:1fr;
  }
  .doc-aside{
    display:none;
  }
}
@media (max-width: 1040px){
  .header-inner{
    grid-template-columns:auto 1fr auto;
  }
  .hero-grid,
  .split-layout,
  .updates-layout,
  .cta-grid{
    grid-template-columns:1fr;
  }
  .proof-grid,
  .testimonial-grid,
  .grid-4,
  .tier-grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
  .grid-3{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 820px){
  .header-inner{
    grid-template-columns:1fr auto;
    gap:12px;
  }
  .search-form{
    grid-column:1 / -1;
    order:3;
  }
  .header-tools .switcher{
    display:none;
  }
  .menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:40px;
    padding:0 14px;
    border:1px solid rgba(219,229,239,.95);
    border-radius:999px;
    background:rgba(255,255,255,.9);
    font-weight:800;
  }
  .mobile-index{
    display:block;
  }
  .mobile-index summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    list-style:none;
    min-height:46px;
    padding:0 16px;
    border-radius:999px;
    border:1px solid rgba(219,229,239,.95);
    background:rgba(255,255,255,.88);
    font-weight:800;
  }
  .mobile-index summary::-webkit-details-marker{display:none;}
  .mobile-index summary::after{
    content:"▾";
    color:var(--muted);
    transition:transform var(--transition);
  }
  .mobile-index[open] summary::after{
    transform:rotate(180deg);
  }
  .mobile-index .aside-nav{
    margin-top:10px;
  }
  .mobile-index .aside-card{
    margin-bottom:16px;
  }
  .section{
    padding:22px;
  }
  .section h2{
    font-size:24px;
  }
  .hero h1{
    font-size:clamp(30px, 9vw, 46px);
  }
  .hero-stage{
    padding:16px;
  }
  .hero-mini-grid,
  .proof-grid,
  .testimonial-grid,
  .grid-4,
  .grid-3,
  .tier-grid{
    grid-template-columns:1fr;
  }
  .footer-inner{
    grid-template-columns:1fr;
  }
  .footer-links{
    justify-content:flex-start;
  }
  .cta-grid h2{
    font-size:26px;
  }
}
@media (max-width: 560px){
  .container{
    width:min(var(--container), calc(100% - 22px));
  }
  .site-header{
    position:static;
  }
  .header-inner{
    min-height:unset;
    padding-block:14px 12px;
  }
  .brand-text{
    font-size:14px;
  }
  .section{
    padding:18px;
    border-radius:22px;
  }
  .hero{
    padding-top:20px;
  }
  .hero-subtitle,
  .section-lead{
    font-size:15px;
  }
  .action-row,
  .cta-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .button{
    width:100%;
  }
  .search-panel{
    padding:12px;
    border-radius:18px;
  }
  .search-panel input{
    font-size:15px;
  }
  .feed-item,
  .quote-card,
  .panel-card,
  .tier-card,
  .metric-card,
  .side-box,
  .aside-card{
    border-radius:18px;
  }
  .faq-item summary,
  .faq-body{
    padding-left:16px;
    padding-right:16px;
  }
}

/* roulang page: article */
:root{
  --bg:#f4f7fb;
  --bg-soft:#eef3f8;
  --panel:#ffffff;
  --panel-2:#f8fbfd;
  --panel-3:#eaf8f5;
  --text:#122033;
  --muted:#5f7089;
  --line:#dbe5ef;
  --line-strong:#c8d4e1;
  --accent:#16b6a4;
  --accent-2:#7769ff;
  --accent-3:#ffb84d;
  --danger:#ef5f6c;
  --shadow:0 18px 50px rgba(15, 28, 44, .08);
  --shadow-soft:0 10px 24px rgba(15, 28, 44, .05);
  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --space-1:6px;
  --space-2:10px;
  --space-3:14px;
  --space-4:18px;
  --space-5:24px;
  --space-6:32px;
  --space-7:44px;
  --space-8:60px;
  --container:1220px;
  --transition:.22s ease;
  color-scheme: light;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 800px at 12% -10%, rgba(22,182,164,.16), transparent 50%),
    radial-gradient(900px 700px at 108% 8%, rgba(119,105,255,.11), transparent 40%),
    linear-gradient(180deg, #f7f9fc 0%, #eef3f8 100%);
  line-height:1.7;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
body::before,
body::after{
  content:"";
  position:fixed;
  inset:auto;
  border-radius:50%;
  pointer-events:none;
  z-index:-1;
  filter:blur(12px);
}
body::before{
  width:240px;height:240px;left:-80px;top:120px;
  background:rgba(22,182,164,.08);
}
body::after{
  width:320px;height:320px;right:-130px;bottom:80px;
  background:rgba(255,184,77,.08);
}
a{
  color:inherit;
  text-decoration:none;
  transition:color var(--transition), transform var(--transition), opacity var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}
img{max-width:100%;display:block;border-radius:var(--radius-md);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{
  outline:3px solid rgba(22,182,164,.28);
  outline-offset:3px;
}
.container{
  width:min(var(--container), calc(100% - 32px));
  margin-inline:auto;
}
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  backdrop-filter:blur(16px);
  background:rgba(247,250,252,.84);
  border-bottom:1px solid rgba(219,229,239,.92);
}
.header-inner{
  display:grid;
  grid-template-columns:auto minmax(280px, 1fr) auto;
  gap:var(--space-4);
  align-items:center;
  min-height:78px;
  padding-block:12px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  font-weight:800;
  letter-spacing:.01em;
}
.brand:hover .brand-mark{transform:translateY(-1px) rotate(-2deg);}
.brand-mark{
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border-radius:14px;
  color:#fff;
  background:linear-gradient(135deg, var(--accent), #28d1bd 44%, var(--accent-2) 100%);
  box-shadow:0 12px 26px rgba(22,182,164,.28);
  flex:none;
  transition:transform var(--transition), box-shadow var(--transition);
}
.brand-text{
  font-size:16px;
  line-height:1.15;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.search-form{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px;
  border-radius:999px;
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.86);
  box-shadow:0 10px 30px rgba(13,31,50,.04);
}
.search-form:focus-within{
  border-color:rgba(22,182,164,.55);
  box-shadow:0 0 0 4px rgba(22,182,164,.12), 0 14px 36px rgba(13,31,50,.06);
}
.search-form input{
  flex:1;
  min-width:0;
  border:0;
  outline:none;
  background:transparent;
  color:var(--text);
}
.search-form input::placeholder{color:#7a8ca6;}
.search-btn{
  border:0;
  border-radius:999px;
  padding:10px 18px;
  background:linear-gradient(135deg, var(--accent), #21c2ae);
  color:#fff;
  font-weight:700;
  box-shadow:0 10px 20px rgba(22,182,164,.22);
}
.search-btn:hover{transform:translateY(-1px);box-shadow:0 14px 22px rgba(22,182,164,.26);}
.search-btn:active{transform:translateY(0);}
.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
}
.switcher{
  display:flex;
  align-items:center;
  gap:6px;
  padding:5px;
  border:1px solid rgba(219,229,239,.86);
  border-radius:999px;
  background:rgba(255,255,255,.66);
}
.switch-pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:34px;
  padding:0 14px;
  border-radius:999px;
  color:var(--muted);
  font-size:13px;
  font-weight:700;
}
.switch-pill.active{
  color:#0f2940;
  background:linear-gradient(180deg, #f6fcfb, #eafaf7);
  box-shadow:inset 0 0 0 1px rgba(22,182,164,.18);
}
.mobile-index{display:none;}
.mobile-index summary{
  list-style:none;
  border:1px solid rgba(219,229,239,.95);
  border-radius:999px;
  background:#fff;
  padding:9px 14px;
  font-weight:800;
  color:#263a53;
}
.mobile-index summary::-webkit-details-marker{display:none;}
.aside-card{
  padding:20px;
  border-radius:var(--radius-xl);
  border:1px solid rgba(219,229,239,.92);
  background:rgba(255,255,255,.86);
  box-shadow:var(--shadow-soft);
}
.aside-card.accent{
  background:
    linear-gradient(180deg, rgba(22,182,164,.12), rgba(255,255,255,.92)),
    rgba(255,255,255,.88);
}
.aside-title{
  margin:0;
  font-size:18px;
  font-weight:800;
}
.aside-note{
  margin:8px 0 0;
  color:var(--muted);
  font-size:14px;
}
.aside-nav{
  display:grid;
  gap:8px;
}
.aside-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  border-radius:14px;
  color:#22354d;
  background:transparent;
  border:1px solid transparent;
}
.aside-nav a::after{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:#b7c5d5;
  box-shadow:0 0 0 4px rgba(183,197,213,.16);
  flex:none;
}
.aside-nav a:hover,
.aside-nav a.active{
  border-color:rgba(22,182,164,.24);
  background:rgba(22,182,164,.06);
  transform:translateX(2px);
}
.section{
  padding:28px;
  border:1px solid rgba(219,229,239,.92);
  border-radius:var(--radius-xl);
  background:rgba(255,255,255,.82);
  box-shadow:var(--shadow-soft);
}
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:20px;
  margin-bottom:22px;
}
.section-kicker{
  margin:0 0 10px;
  color:var(--accent);
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.section h2{
  margin:0;
  font-size:28px;
  line-height:1.15;
  letter-spacing:-.03em;
}
.section-lead{
  margin:10px 0 0;
  color:var(--muted);
  max-width:70ch;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:11px 18px;
  border-radius:999px;
  border:1px solid transparent;
  font-weight:800;
  line-height:1;
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg, var(--accent), #20c4b1);
  box-shadow:0 14px 30px rgba(22,182,164,.22);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 18px 36px rgba(22,182,164,.28);
}
.btn-secondary{
  background:#fff;
  color:#22354d;
  border-color:rgba(200,212,225,.95);
}
.btn-secondary:hover{
  border-color:rgba(22,182,164,.32);
  color:#0c7268;
  transform:translateY(-2px);
  box-shadow:var(--shadow-soft);
}
.btn-ghost{
  color:#425875;
  background:rgba(255,255,255,.58);
  border-color:rgba(219,229,239,.9);
}
.btn-ghost:hover{
  color:#122033;
  background:#fff;
  box-shadow:var(--shadow-soft);
}
.badge,
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  border-radius:999px;
  padding:6px 11px;
  font-size:12px;
  line-height:1;
  font-weight:800;
}
.badge{
  color:#0e6058;
  background:rgba(22,182,164,.11);
  border:1px solid rgba(22,182,164,.18);
}
.badge.orange{
  color:#815409;
  background:rgba(255,184,77,.14);
  border-color:rgba(255,184,77,.24);
}
.badge.purple{
  color:#4b42af;
  background:rgba(119,105,255,.11);
  border-color:rgba(119,105,255,.2);
}
.tag{
  color:#405571;
  background:#f3f7fb;
  border:1px solid rgba(219,229,239,.95);
}
.page-shell{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:24px;
  padding:26px 0 60px;
}
.doc-sidebar{
  position:sticky;
  top:102px;
  align-self:start;
  display:grid;
  gap:16px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 14px;
  color:var(--muted);
  font-size:14px;
}
.breadcrumb a{
  color:#315069;
  font-weight:800;
}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:#9aabba;}
.article-hero{
  position:relative;
  overflow:hidden;
  padding:34px;
  border-radius:var(--radius-xl);
  border:1px solid rgba(219,229,239,.92);
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78)),
    radial-gradient(520px 260px at 85% 10%, rgba(119,105,255,.15), transparent 65%),
    radial-gradient(520px 260px at 12% 12%, rgba(22,182,164,.18), transparent 65%);
  box-shadow:var(--shadow);
}
.article-hero::before{
  content:"";
  position:absolute;
  inset:-1px;
  border-radius:inherit;
  padding:1px;
  background:linear-gradient(135deg, rgba(22,182,164,.48), rgba(119,105,255,.28), rgba(255,184,77,.26));
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
}
.article-meta-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
  margin-bottom:18px;
}
.article-hero h1{
  margin:0;
  max-width:900px;
  font-size:clamp(30px, 5vw, 52px);
  line-height:1.08;
  letter-spacing:-.045em;
}
.article-summary{
  margin:18px 0 0;
  max-width:860px;
  color:#50627a;
  font-size:17px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:24px;
}
.article-stage{
  display:grid;
  grid-template-columns:1fr 210px;
  gap:22px;
  align-items:end;
}
.data-stack{
  display:grid;
  gap:12px;
}
.data-badge{
  padding:16px;
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.76);
  border:1px solid rgba(219,229,239,.95);
  box-shadow:var(--shadow-soft);
}
.data-badge strong{
  display:block;
  font-size:24px;
  line-height:1.1;
  letter-spacing:-.03em;
}
.data-badge span{
  display:block;
  margin-top:5px;
  color:var(--muted);
  font-size:13px;
}
.content-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:24px;
  margin-top:24px;
}
.article-card{
  overflow:hidden;
  border-radius:var(--radius-xl);
  border:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.9);
  box-shadow:var(--shadow-soft);
}
.article-toolbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:18px 24px;
  border-bottom:1px solid rgba(219,229,239,.9);
  background:linear-gradient(180deg, #fbfdff, #f6fafc);
}
.toolbar-title{
  margin:0;
  font-weight:900;
  color:#1b3048;
}
.toolbar-tags{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:8px;
}
.article-body{
  padding:34px;
  color:#263a53;
  font-size:17px;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body > *:last-child{margin-bottom:0;}
.article-body h2,
.article-body h3,
.article-body h4{
  color:#122033;
  line-height:1.24;
  letter-spacing:-.025em;
}
.article-body h2{
  margin:38px 0 14px;
  padding-top:6px;
  font-size:30px;
}
.article-body h3{
  margin:30px 0 12px;
  font-size:24px;
}
.article-body h4{
  margin:24px 0 10px;
  font-size:19px;
}
.article-body p{
  margin:16px 0;
}
.article-body a{
  color:#0b8f82;
  font-weight:800;
  border-bottom:1px solid rgba(22,182,164,.28);
}
.article-body a:hover{
  color:#07665e;
  border-color:rgba(22,182,164,.62);
}
.article-body ul,
.article-body ol{
  margin:16px 0 18px;
  padding-left:1.4em;
}
.article-body li{margin:8px 0;}
.article-body blockquote{
  position:relative;
  margin:28px 0;
  padding:22px 24px 22px 28px;
  border-left:5px solid var(--accent);
  border-radius:0 var(--radius-lg) var(--radius-lg) 0;
  color:#263a53;
  background:
    linear-gradient(90deg, rgba(22,182,164,.1), rgba(22,182,164,.03)),
    #fbfefd;
}
.article-body blockquote::before{
  content:"";
  position:absolute;
  width:9px;
  height:9px;
  left:-7px;
  top:24px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 6px rgba(22,182,164,.14);
}
.article-body pre{
  overflow:auto;
  margin:24px 0;
  padding:18px;
  border-radius:var(--radius-md);
  color:#edf8f7;
  background:#132131;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.article-body code{
  padding:2px 6px;
  border-radius:7px;
  color:#0f766d;
  background:rgba(22,182,164,.1);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  font-size:.92em;
}
.article-body pre code{
  padding:0;
  color:inherit;
  background:transparent;
}
.article-body table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  margin:24px 0;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
}
.article-body th,
.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.article-body th{
  background:#f2f7fb;
  font-weight:900;
}
.article-body tr:last-child td{border-bottom:0;}
.article-body img{
  margin:24px auto;
  border:1px solid rgba(219,229,239,.9);
  box-shadow:var(--shadow-soft);
}
.empty-state{
  display:grid;
  place-items:center;
  min-height:360px;
  padding:46px 24px;
  text-align:center;
}
.empty-state h2{
  margin:0;
  font-size:30px;
}
.empty-state p{
  margin:10px auto 22px;
  max-width:560px;
  color:var(--muted);
}
.read-side{
  display:grid;
  align-self:start;
  gap:16px;
  position:sticky;
  top:102px;
}
.mini-list{
  display:grid;
  gap:10px;
  margin-top:14px;
}
.mini-item{
  display:block;
  padding:14px;
  border-radius:var(--radius-md);
  border:1px solid rgba(219,229,239,.9);
  background:#fff;
}
.mini-item:hover{
  border-color:rgba(22,182,164,.28);
  transform:translateY(-2px);
  box-shadow:var(--shadow-soft);
}
.mini-item strong{
  display:block;
  font-size:15px;
  line-height:1.35;
}
.mini-item span{
  display:block;
  margin-top:5px;
  color:var(--muted);
  font-size:13px;
}
.progress-card{
  padding:18px;
  border-radius:var(--radius-lg);
  background:#132033;
  color:#fff;
  overflow:hidden;
  position:relative;
}
.progress-card::after{
  content:"";
  position:absolute;
  width:160px;
  height:160px;
  right:-70px;
  top:-70px;
  border-radius:50%;
  background:rgba(22,182,164,.25);
}
.progress-card p{
  margin:8px 0 0;
  color:rgba(255,255,255,.72);
  font-size:14px;
}
.progress-line{
  height:9px;
  margin-top:16px;
  border-radius:999px;
  background:rgba(255,255,255,.14);
  overflow:hidden;
}
.progress-line span{
  display:block;
  width:76%;
  height:100%;
  border-radius:inherit;
  background:linear-gradient(90deg, var(--accent), var(--accent-3));
}
.related-section{
  margin-top:24px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.related-card{
  padding:20px;
  min-height:170px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(219,229,239,.94);
  background:rgba(255,255,255,.84);
  box-shadow:var(--shadow-soft);
}
.related-card:hover{
  transform:translateY(-3px);
  border-color:rgba(22,182,164,.28);
  box-shadow:var(--shadow);
}
.related-card .tag{margin-bottom:12px;}
.related-card h3{
  margin:0;
  font-size:18px;
  line-height:1.35;
}
.related-card p{
  margin:9px 0 0;
  color:var(--muted);
  font-size:14px;
}
.cta-band{
  margin-top:24px;
  padding:30px;
  border-radius:var(--radius-xl);
  border:1px solid rgba(22,182,164,.22);
  background:
    linear-gradient(135deg, rgba(22,182,164,.14), rgba(119,105,255,.08)),
    rgba(255,255,255,.86);
  box-shadow:var(--shadow-soft);
}
.cta-band-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.cta-band h2{
  margin:0;
  font-size:26px;
  line-height:1.2;
}
.cta-band p{
  margin:8px 0 0;
  color:var(--muted);
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:flex-end;
}
.faq-list{
  display:grid;
  gap:12px;
}
.faq-item{
  border:1px solid rgba(219,229,239,.95);
  border-radius:var(--radius-lg);
  background:#fff;
  overflow:hidden;
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  cursor:pointer;
  font-weight:900;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  display:grid;
  place-items:center;
  width:28px;
  height:28px;
  flex:none;
  border-radius:50%;
  color:#0d7269;
  background:rgba(22,182,164,.1);
}
.faq-item[open] summary::after{content:"−";}
.faq-item p{
  margin:0;
  padding:0 20px 20px;
  color:var(--muted);
}
.site-footer{
  padding:36px 0;
  border-top:1px solid rgba(219,229,239,.95);
  background:rgba(255,255,255,.62);
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(260px,.8fr);
  gap:28px;
  align-items:start;
}
.footer-brand strong{
  display:block;
  font-size:20px;
}
.footer-brand p{
  margin:10px 0 12px;
  max-width:680px;
  color:var(--muted);
}
.footer-meta{
  color:#71829a;
  font-size:14px;
  margin-top:5px;
}
.footer-links{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:10px;
}
.footer-links a{
  padding:9px 12px;
  border-radius:999px;
  color:#415873;
  background:#fff;
  border:1px solid rgba(219,229,239,.9);
}
.footer-links a:hover{
  color:#0d7269;
  border-color:rgba(22,182,164,.28);
  transform:translateY(-1px);
}
@media (max-width:1024px){
  .header-inner{
    grid-template-columns:1fr;
    gap:12px;
  }
  .brand{
    width:100%;
  }
  .header-tools{
    justify-content:space-between;
  }
  .page-shell{
    grid-template-columns:1fr;
  }
  .doc-sidebar{
    position:static;
    order:2;
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .article-stage{
    grid-template-columns:1fr;
  }
  .data-stack{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .content-grid{
    grid-template-columns:1fr;
  }
  .read-side{
    position:static;
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media (max-width:768px){
  .container{
    width:min(100% - 24px, var(--container));
  }
  .site-header{
    position:relative;
  }
  .header-inner{
    min-height:auto;
    padding-block:14px;
  }
  .brand-text{
    max-width:calc(100vw - 96px);
  }
  .search-form{
    order:3;
    width:100%;
  }
  .header-tools{
    width:100%;
  }
  .switcher{
    overflow:auto;
    max-width:calc(100vw - 116px);
  }
  .mobile-index{
    display:block;
    position:relative;
  }
  .mobile-index .aside-card{
    position:absolute;
    right:0;
    top:46px;
    width:min(310px, calc(100vw - 24px));
    z-index:20;
  }
  .page-shell{
    padding-top:18px;
  }
  .doc-sidebar{
    display:none;
  }
  .article-hero{
    padding:24px;
  }
  .article-summary{
    font-size:16px;
  }
  .data-stack{
    grid-template-columns:1fr;
  }
  .article-toolbar{
    align-items:flex-start;
    flex-direction:column;
  }
  .toolbar-tags{
    justify-content:flex-start;
  }
  .article-body{
    padding:24px;
    font-size:16px;
  }
  .article-body h2{font-size:25px;}
  .article-body h3{font-size:21px;}
  .read-side{
    grid-template-columns:1fr;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
  .cta-band-inner{
    flex-direction:column;
    align-items:flex-start;
  }
  .cta-actions{
    justify-content:flex-start;
    width:100%;
  }
  .footer-inner{
    grid-template-columns:1fr;
  }
  .footer-links{
    justify-content:flex-start;
  }
}
@media (max-width:520px){
  .brand-mark{
    width:38px;
    height:38px;
    border-radius:13px;
  }
  .brand-text{
    font-size:14px;
  }
  .search-form{
    border-radius:22px;
    align-items:stretch;
    flex-direction:column;
  }
  .search-btn{
    width:100%;
  }
  .switch-pill{
    padding:0 10px;
    font-size:12px;
  }
  .article-hero{
    padding:20px;
    border-radius:22px;
  }
  .article-meta-row{
    gap:8px;
  }
  .hero-actions .btn,
  .cta-actions .btn{
    width:100%;
  }
  .section{
    padding:22px;
    border-radius:22px;
  }
  .section-head{
    display:block;
  }
  .section h2{
    font-size:24px;
  }
  .article-body{
    padding:20px;
  }
  .article-body table{
    display:block;
    overflow-x:auto;
    white-space:nowrap;
  }
  .footer-links a{
    flex:1 1 auto;
    text-align:center;
  }
}