/* roulang page: index */
:root{
  --bg:#050a16;
  --bg-soft:#070f22;
  --bg-panel:#0a1428;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.16);
  --line-strong:rgba(110,160,255,.34);
  --text:#e9effb;
  --muted:#94a7c6;
  --muted-2:#6f83a4;
  --primary:#2f6dff;
  --primary-2:#37d3ff;
  --warn:#ffb454;
  --danger:#ff6b7a;
  --ok:#3ddc97;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 20px 48px rgba(0,8,32,.55);
  --glow:0 12px 34px rgba(47,109,255,.38);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
a{color:var(--primary-2);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#7fe4ff}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary-2);outline-offset:3px;border-radius:6px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:76px 0;position:relative}
.section--alt{background:linear-gradient(180deg,rgba(10,20,40,.85),rgba(5,10,22,.2))}
.section-head{max-width:800px;margin-bottom:38px}
.section-head h2{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.4;
  font-weight:700;
  letter-spacing:.4px;
  margin-bottom:14px;
}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1px;color:var(--primary-2);
  background:rgba(55,211,255,.08);
  border:1px solid rgba(55,211,255,.28);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 10px var(--primary-2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  color:#04122b;
  box-shadow:var(--glow);
}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 18px 42px rgba(47,109,255,.55);color:#03101f}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line-strong);
  color:var(--text);
}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(55,211,255,.12);border-color:var(--primary-2);transform:translateY(-2px);color:#fff}
.btn:active{transform:translateY(0)}
.toppanel{
  background:#030712;
  border-bottom:1px solid rgba(110,160,255,.12);
  font-size:13px;
  color:var(--muted-2);
}
.toppanel .container{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:40px;flex-wrap:wrap;
}
.toppanel .tp-left{display:flex;align-items:center;gap:10px;letter-spacing:.4px}
.toppanel .tp-dot{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 8px rgba(61,220,151,.9)}
.toppanel .tp-right{display:flex;align-items:center;gap:18px}
.toppanel a{color:var(--muted);font-size:13px}
.toppanel a:hover{color:var(--primary-2)}
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,22,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(110,160,255,.14);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:74px;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand:hover{color:#fff}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  background:linear-gradient(140deg,#2f6dff,#37d3ff);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:#03101f;
  box-shadow:0 10px 26px rgba(47,109,255,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--muted-2);letter-spacing:1.6px}
.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{
  display:inline-flex;align-items:center;
  padding:9px 16px;border-radius:999px;
  font-size:15px;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.site-nav a:hover{background:rgba(55,211,255,.1);color:var(--text)}
.site-nav a.is-active{background:rgba(55,211,255,.14);color:var(--primary-2);font-weight:600}
.nav-dl{
  margin-left:10px;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  color:#04122b !important;font-weight:700;
  box-shadow:0 8px 22px rgba(47,109,255,.4);
}
.nav-dl:hover{transform:translateY(-1px)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  cursor:pointer;color:var(--text);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.hero{
  position:relative;
  padding:64px 0 70px;
  overflow:hidden;
  border-bottom:1px solid rgba(110,160,255,.1);
}
.hero::before{
  content:"";position:absolute;inset:-20% -10% auto -10%;height:640px;
  background:
    radial-gradient(circle at 22% 28%,rgba(47,109,255,.34),transparent 58%),
    radial-gradient(circle at 78% 12%,rgba(55,211,255,.22),transparent 55%);
  filter:blur(10px);pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:52px;align-items:start;
}
.hero h1{
  font-size:clamp(27px,3.4vw,42px);
  line-height:1.32;
  font-weight:800;
  letter-spacing:.5px;
  margin-bottom:20px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#5aa0ff,#37d3ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-desc{color:var(--muted);font-size:16px;line-height:1.9;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-points{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
}
.hero-points li{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px 14px;
  min-width:0;
}
.hero-points strong{display:block;font-size:24px;font-weight:800;color:var(--primary-2);line-height:1.2}
.hero-points span{display:block;font-size:13px;color:var(--muted-2);margin-top:6px;line-height:1.5}

.compare-stage{display:grid;grid-template-columns:1fr;gap:18px}
.cmp-card{
  background:linear-gradient(165deg,rgba(255,255,255,.075),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:22px 22px 20px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:var(--shadow);
  min-width:0;
}
.cmp-card header{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.cmp-card h2,.cmp-card h3{font-size:16px;font-weight:700;letter-spacing:.3px}
.cmp-tag{
  font-size:12px;padding:3px 10px;border-radius:999px;letter-spacing:1px;
}
.cmp-before{border-color:rgba(255,107,122,.3)}
.cmp-before .cmp-tag{background:rgba(255,107,122,.14);color:#ff9aa5;border:1px solid rgba(255,107,122,.35)}
.cmp-after{border-color:rgba(61,220,151,.3)}
.cmp-after .cmp-tag{background:rgba(61,220,151,.14);color:#79f0bd;border:1px solid rgba(61,220,151,.35)}
.cmp-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--muted);line-height:1.7;
  padding:7px 0;border-bottom:1px dashed rgba(110,160,255,.12);
}
.cmp-list li:last-child{border-bottom:0}
.cmp-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;margin-top:9px;
  background:var(--muted-2);
}
.cmp-after .cmp-list li::before{background:var(--ok);box-shadow:0 0 8px rgba(61,220,151,.8)}
.cmp-before .cmp-list li::before{background:var(--danger);box-shadow:0 0 8px rgba(255,107,122,.7)}

.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.metric-card{
  background:linear-gradient(170deg,rgba(47,109,255,.16),rgba(255,255,255,.03));
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 20px;
  min-width:0;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.metric-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 16px 36px rgba(0,10,40,.5)}
.metric-num{font-size:32px;font-weight:800;line-height:1.1;color:#fff;letter-spacing:1px}
.metric-num small{font-size:15px;font-weight:600;color:var(--primary-2);margin-left:4px}
.metric-card p{font-size:13.5px;color:var(--muted);margin-top:10px;line-height:1.7}

.matrix-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.g-card{
  background:linear-gradient(165deg,rgba(255,255,255,.07),rgba(255,255,255,.018));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:26px 24px;
  min-width:0;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.g-card:hover{transform:translateY(-5px);border-color:rgba(55,211,255,.42);box-shadow:0 22px 46px rgba(0,10,40,.55)}
.g-card-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  font-size:14px;font-weight:800;color:#04122b;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  margin-bottom:16px;
}
.g-card h3{font-size:17px;font-weight:700;margin-bottom:10px;line-height:1.5}
.g-card p{font-size:14.5px;color:var(--muted);line-height:1.85}

.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.028);
  -webkit-overflow-scrolling:touch;
}
.cmp-table{width:100%;border-collapse:collapse;min-width:640px}
.cmp-table th,.cmp-table td{
  text-align:left;padding:16px 20px;font-size:14.5px;line-height:1.7;
  border-bottom:1px solid rgba(110,160,255,.12);
  vertical-align:top;
}
.cmp-table thead th{
  font-size:13.5px;letter-spacing:.6px;color:var(--muted-2);font-weight:600;
  background:rgba(10,20,40,.75);
}
.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table td:first-child{color:#cfe0ff;font-weight:600;white-space:nowrap}
.cmp-table .col-before{color:#ff9aa5}
.cmp-table .col-after{color:#8af0c3}
.cmp-table tbody tr:hover{background:rgba(55,211,255,.05)}

.timeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;position:relative}
.tl-item{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 18px;
  min-width:0;
  position:relative;
  transition:border-color .2s ease,transform .2s ease;
}
.tl-item:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.tl-step{
  font-size:12px;letter-spacing:1.4px;color:var(--primary-2);
  font-weight:700;margin-bottom:10px;display:block;
}
.tl-item h3{font-size:15.5px;font-weight:700;margin-bottom:8px;line-height:1.5}
.tl-item p{font-size:13.5px;color:var(--muted);line-height:1.75}

.feed-grid{display:grid;grid-template-columns:minmax(0,1.85fr) minmax(0,1fr);gap:28px;align-items:start}
.feed-list{display:grid;grid-template-columns:1fr;gap:14px}
.feed-item{
  display:block;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px 22px;
  min-width:0;
  transition:border-color .22s ease,background .22s ease,transform .22s ease;
}
.feed-item:hover{background:rgba(55,211,255,.07);border-color:rgba(55,211,255,.4);transform:translateX(3px)}
.feed-item h3{font-size:16.5px;font-weight:700;color:var(--text);line-height:1.55;margin-bottom:8px}
.feed-item p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:12px}
.feed-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--muted-2)}
.chip{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.5px;
  background:rgba(55,211,255,.1);
  border:1px solid rgba(55,211,255,.26);
  color:#8fe1ff;
}
.feed-foot{margin-top:18px}
.side-card{
  background:linear-gradient(170deg,rgba(47,109,255,.18),rgba(255,255,255,.025));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px 22px;
  margin-bottom:20px;
  min-width:0;
}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:16px;letter-spacing:.4px}
.rank-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:11px 0;border-bottom:1px dashed rgba(110,160,255,.14);
  font-size:14px;color:var(--muted);line-height:1.7;
}
.rank-list li:last-child{border-bottom:0;padding-bottom:0}
.rank-no{
  flex:0 0 22px;width:22px;height:22px;border-radius:7px;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:#04122b;
  background:rgba(55,211,255,.85);margin-top:2px;
}
.side-card .side-note{font-size:13.5px;color:var(--muted);line-height:1.8;margin-top:14px}
.side-link{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  width:100%;margin-top:16px;padding:11px 18px;border-radius:999px;
  font-size:14px;font-weight:600;
  background:rgba(55,211,255,.12);border:1px solid rgba(55,211,255,.35);color:#9ce7ff;
  transition:background .2s ease,transform .2s ease,color .2s ease;
}
.side-link:hover{background:rgba(55,211,255,.22);color:#fff;transform:translateY(-2px)}

.topic-row{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:14px}
.topic-pill{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px 14px;
  text-align:center;
  min-width:0;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.topic-pill:hover{border-color:rgba(55,211,255,.45);background:rgba(55,211,255,.08);transform:translateY(-3px)}
.topic-pill strong{display:block;font-size:15px;font-weight:700;color:#dbe8ff;margin-bottom:6px}
.topic-pill span{display:block;font-size:12.5px;color:var(--muted-2);line-height:1.6}

.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
  display:flex;flex-direction:column;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:22px 20px;
  min-width:0;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(55,211,255,.4);box-shadow:0 18px 40px rgba(0,10,40,.5)}
.post-card h3{font-size:16px;font-weight:700;line-height:1.6;color:var(--text);margin-bottom:10px}
.post-card p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:14px;flex:1 1 auto}
.empty-note{
  padding:26px;border:1px dashed var(--line-strong);border-radius:var(--radius);
  color:var(--muted);font-size:14.5px;text-align:center;
}

.cost-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:24px}
.cost-card{
  background:linear-gradient(170deg,rgba(255,180,84,.12),rgba(255,255,255,.025));
  border:1px solid rgba(255,180,84,.25);
  border-radius:var(--radius-lg);
  padding:24px 22px;min-width:0;
  transition:transform .22s ease,border-color .22s ease;
}
.cost-card:hover{transform:translateY(-4px);border-color:rgba(255,180,84,.5)}
.cost-card h3{font-size:16.5px;font-weight:700;margin-bottom:10px;color:#ffd8a6}
.cost-card p{font-size:14px;color:var(--muted);line-height:1.85}
.lever-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:22px;
}
.lever-item{min-width:0}
.lever-item strong{display:block;font-size:18px;font-weight:800;color:#9ce7ff}
.lever-item span{display:block;font-size:13px;color:var(--muted-2);margin-top:6px;line-height:1.65}

.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.scene-card{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  min-width:0;
  display:flex;gap:18px;align-items:flex-start;
  transition:border-color .22s ease,background .22s ease;
}
.scene-card:hover{border-color:rgba(55,211,255,.4);background:rgba(55,211,255,.06)}
.scene-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;color:#04122b;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
}
.scene-body{min-width:0}
.scene-body h3{font-size:16px;font-weight:700;margin-bottom:8px}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.82}

.guard-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.guard-item{
  background:rgba(61,220,151,.06);
  border:1px solid rgba(61,220,151,.24);
  border-radius:var(--radius);
  padding:22px 20px;min-width:0;
  transition:transform .2s ease,border-color .2s ease;
}
.guard-item:hover{transform:translateY(-3px);border-color:rgba(61,220,151,.5)}
.guard-item h3{font-size:15.5px;font-weight:700;margin-bottom:8px;color:#96f0cb}
.guard-item p{font-size:14px;color:var(--muted);line-height:1.8}

.myth-list{display:grid;grid-template-columns:1fr;gap:14px}
.myth-item{
  display:flex;gap:16px;align-items:flex-start;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,107,122,.22);
  border-radius:var(--radius);
  padding:20px 22px;min-width:0;
  transition:border-color .2s ease,background .2s ease;
}
.myth-item:hover{border-color:rgba(255,107,122,.45);background:rgba(255,107,122,.05)}
.myth-badge{
  flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;color:#2a0a10;
  background:rgba(255,107,122,.85);margin-top:2px;
}
.myth-body{min-width:0}
.myth-body h3{font-size:15.5px;font-weight:700;margin-bottom:6px;color:#ffc3ca}
.myth-body p{font-size:14px;color:var(--muted);line-height:1.82}

.download-band{
  background:
    radial-gradient(circle at 18% 20%,rgba(47,109,255,.35),transparent 60%),
    radial-gradient(circle at 82% 80%,rgba(55,211,255,.22),transparent 58%),
    #071129;
  border:1px solid rgba(55,211,255,.22);
  border-radius:26px;
  padding:44px 40px;
  box-shadow:var(--shadow);
}
.download-band h2{font-size:clamp(21px,2.2vw,28px);font-weight:800;margin-bottom:14px;letter-spacing:.4px}
.download-band > p{color:var(--muted);font-size:15px;line-height:1.85;max-width:760px;margin-bottom:28px}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:22px}
.dl-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(110,160,255,.26);
  border-radius:var(--radius-lg);
  padding:22px 20px;min-width:0;
  display:flex;flex-direction:column;gap:12px;
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(55,211,255,.55);background:rgba(55,211,255,.09)}
.dl-card h3{font-size:16.5px;font-weight:700}
.dl-card p{font-size:13.5px;color:var(--muted);line-height:1.75;flex:1 1 auto}
.dl-card .btn{width:100%}
.dl-note{font-size:13px;color:var(--muted-2);line-height:1.8}

.faq-list{display:grid;grid-template-columns:1fr;gap:14px}
.faq-item{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 24px;min-width:0;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:var(--line-strong);background:rgba(55,211,255,.05)}
.faq-item h3{font-size:16px;font-weight:700;margin-bottom:10px;line-height:1.6;color:#d9e7ff}
.faq-item p{font-size:14.5px;color:var(--muted);line-height:1.9}

.check-panel{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:28px;align-items:start;
  background:linear-gradient(170deg,rgba(47,109,255,.16),rgba(255,255,255,.025));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px;
}
.check-list{display:grid;grid-template-columns:1fr;gap:10px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:13px 16px;
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.check-item:hover{border-color:rgba(55,211,255,.4);background:rgba(55,211,255,.07)}
.check-item input{
  appearance:none;-webkit-appearance:none;
  flex:0 0 18px;width:18px;height:18px;margin:3px 0 0;
  border:2px solid rgba(110,160,255,.55);border-radius:5px;
  background:transparent;cursor:pointer;position:relative;
  transition:border-color .18s ease,background .18s ease;
}
.check-item input:checked{border-color:var(--primary-2);background:var(--primary-2)}
.check-item input:checked::after{
  content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;
  border:solid #04122b;border-width:0 2px 2px 0;transform:rotate(45deg);
}
.check-item span{font-size:14.5px;color:#cadcf8;line-height:1.7;min-width:0}
.check-side h3{font-size:17px;font-weight:700;margin-bottom:12px}
.check-side p{font-size:14px;color:var(--muted);line-height:1.85;margin-bottom:18px}
.progress-box{
  background:rgba(5,10,22,.6);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
}
.progress-num{font-size:26px;font-weight:800;color:var(--primary-2);line-height:1.2}
.progress-track{
  height:8px;border-radius:999px;background:rgba(110,160,255,.16);
  margin:12px 0 10px;overflow:hidden;
}
.progress-fill{
  height:100%;width:0;border-radius:999px;
  background:linear-gradient(90deg,#2f6dff,#37d3ff);
  transition:width .3s ease;
}
.progress-text{font-size:13px;color:var(--muted-2);line-height:1.7}

.site-footer{
  background:#03060f;
  border-top:1px solid rgba(110,160,255,.14);
  padding:56px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:36px;align-items:start;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--muted-2);line-height:1.9;max-width:360px}
.footer-col h4{font-size:14.5px;font-weight:700;color:#d5e4ff;margin-bottom:14px;letter-spacing:.5px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--muted-2)}
.footer-col a:hover{color:var(--primary-2)}
.footer-bottom{
  margin-top:38px;padding-top:20px;
  border-top:1px solid rgba(110,160,255,.1);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted-2);
}
.footer-bottom a{color:var(--muted-2)}
.footer-bottom a:hover{color:var(--primary-2)}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .matrix-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feed-grid{grid-template-columns:1fr}
  .topic-row{grid-template-columns:repeat(3,minmax(0,1fr))}
  .cost-grid{grid-template-columns:1fr}
  .lever-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dl-grid{grid-template-columns:1fr}
  .check-panel{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-band{padding:34px 26px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .container{padding:0 18px}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(6,12,26,.98);
    border-bottom:1px solid rgba(110,160,255,.18);
    padding:14px 18px 20px;
    box-shadow:0 22px 44px rgba(0,6,20,.7);
  }
  .site-header.is-open .site-nav{display:flex}
  .site-nav a{padding:12px 16px;border-radius:12px;font-size:15px}
  .nav-dl{margin-left:0;justify-content:center;margin-top:6px}
  .nav-toggle{display:inline-flex}
  .header-inner{min-height:66px;position:relative}
  .hero{padding:44px 0 52px}
  .hero-points{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
  .hero-points strong{font-size:20px}
  .hero-points span{font-size:12px}
  .scene-grid{grid-template-columns:1fr}
  .myth-item{flex-direction:row}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .metric-grid{grid-template-columns:1fr}
  .matrix-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .topic-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-grid{grid-template-columns:1fr}
  .lever-bar{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .hero-points{grid-template-columns:1fr}
  .check-panel{padding:22px 18px}
  .download-band{padding:26px 20px;border-radius:20px}
  .cmp-table th,.cmp-table td{padding:12px 14px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:11px;letter-spacing:1px}
  .scene-card{flex-direction:column;gap:12px}
}

/* roulang page: article */
:root{
  --bg:#050a16;
  --bg-soft:#070f22;
  --bg-panel:#0a1428;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.16);
  --line-strong:rgba(110,160,255,.34);
  --text:#e9effb;
  --muted:#94a7c6;
  --muted-2:#6f83a4;
  --primary:#2f6dff;
  --primary-2:#37d3ff;
  --warn:#ffb454;
  --danger:#ff6b7a;
  --ok:#3ddc97;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 20px 48px rgba(0,8,32,.55);
  --glow:0 12px 34px rgba(47,109,255,.38);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--primary-2);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#7fe4ff}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--text)}
p{margin:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#2f6dff,#37d3ff);color:#04122b;box-shadow:var(--glow)}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 18px 42px rgba(47,109,255,.55);color:#03101f}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(55,211,255,.12);border-color:var(--primary-2);transform:translateY(-2px);color:#fff}
.btn:active{transform:translateY(0)}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--primary-2);outline-offset:3px}
.toppanel{background:rgba(8,16,34,.92);border-bottom:1px solid rgba(110,160,255,.12);font-size:13px}
.toppanel .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px;flex-wrap:wrap}
.toppanel .top-note{color:var(--muted-2);display:inline-flex;align-items:center;gap:8px}
.toppanel .top-note::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--warn);box-shadow:0 0 10px rgba(255,180,84,.8)}
.toppanel a{color:var(--muted)}
.toppanel a:hover{color:var(--primary-2)}
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,22,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(110,160,255,.14);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand:hover{color:#fff}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  background:linear-gradient(140deg,#2f6dff,#37d3ff);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:#03101f;
  box-shadow:0 10px 26px rgba(47,109,255,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--muted-2);letter-spacing:1.6px}
.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{
  display:inline-flex;align-items:center;
  padding:9px 16px;border-radius:999px;
  font-size:15px;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.site-nav a:hover{background:rgba(55,211,255,.1);color:var(--text)}
.site-nav a.is-active{background:rgba(55,211,255,.14);color:var(--primary-2);font-weight:600}
.nav-dl{
  margin-left:10px;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  color:#04122b !important;font-weight:700;
  box-shadow:0 8px 22px rgba(47,109,255,.4);
}
.nav-dl:hover{transform:translateY(-1px)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  cursor:pointer;color:var(--text);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 文章页首屏 */
.article-hero{
  position:relative;padding:46px 0 38px;overflow:hidden;
  border-bottom:1px solid rgba(110,160,255,.1);
}
.article-hero::before{
  content:"";position:absolute;inset:-30% -10% auto -10%;height:520px;
  background:
    radial-gradient(circle at 20% 30%,rgba(47,109,255,.28),transparent 58%),
    radial-gradient(circle at 80% 8%,rgba(55,211,255,.18),transparent 52%);
  filter:blur(10px);pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted-2);margin-bottom:20px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--primary-2)}
.crumbs .sep{color:rgba(148,167,198,.45)}
.crumbs .current{color:var(--muted-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero h1{
  font-size:clamp(24px,3vw,36px);
  line-height:1.42;font-weight:800;letter-spacing:.3px;
  margin-bottom:18px;max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:14px;color:var(--muted)}
.article-meta .tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;color:var(--primary-2);
  background:rgba(55,211,255,.09);
  border:1px solid rgba(55,211,255,.28);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .meta-item::before{content:"";width:4px;height:4px;border-radius:50%;background:rgba(148,167,198,.6)}
.article-lead{
  margin-top:22px;max-width:820px;
  padding:2px 0 2px 16px;
  border-left:3px solid rgba(55,211,255,.5);
  color:var(--muted);font-size:15.5px;line-height:1.9;
  overflow-wrap:break-word;
}

/* 文章主体布局 */
.article-section{padding:50px 0 78px;position:relative}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:40px;align-items:start;
}
.article-main{min-width:0;max-width:760px}
.article-side{
  min-width:0;
  position:sticky;top:96px;
  display:flex;flex-direction:column;gap:18px;
}
.side-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.side-card h3{font-size:15px;font-weight:700;letter-spacing:.4px;margin-bottom:14px;color:#fff}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.side-list li{display:flex;gap:10px;font-size:14px;color:var(--muted);line-height:1.7;min-width:0}
.side-list li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:8px;border-radius:2px;background:var(--primary-2);box-shadow:0 0 8px rgba(55,211,255,.7)}
.side-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--muted);transition:background .2s ease,color .2s ease}
.side-links a:hover{background:rgba(55,211,255,.1);color:var(--text)}
.side-links a::after{content:"›";font-size:16px;color:var(--primary-2)}
.side-dl{display:flex;flex-direction:column;gap:10px}
.side-dl a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(5,10,22,.5);
  font-size:14px;color:var(--text);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease,color .2s ease;
}
.side-dl a:hover{border-color:var(--primary-2);transform:translateY(-2px);box-shadow:var(--glow);color:#fff}
.side-dl a span{font-size:12px;color:var(--muted-2)}

/* 正文排版 */
.prose{
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:34px 34px 28px;
  color:#d5e1f3;
  font-size:16.5px;line-height:1.95;
  overflow-wrap:break-word;
  word-break:normal;
}
.prose > *:first-child{margin-top:0}
.prose h2{
  font-size:21px;line-height:1.55;color:#fff;font-weight:700;
  margin:34px 0 14px;padding-left:14px;
  border-left:4px solid var(--primary);
}
.prose h3{font-size:17.5px;line-height:1.6;color:#eaf2ff;font-weight:700;margin:26px 0 12px}
.prose h4{font-size:16px;color:#eaf2ff;margin:20px 0 10px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose li{margin-bottom:9px}
.prose li::marker{color:var(--primary-2)}
.prose a{color:var(--primary-2);border-bottom:1px solid rgba(55,211,255,.35)}
.prose a:hover{border-bottom-color:var(--primary-2)}
.prose strong,.prose b{color:#fff}
.prose blockquote{
  margin:20px 0;padding:14px 18px;
  border-left:3px solid var(--primary);
  background:rgba(47,109,255,.1);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--muted);font-size:15.5px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--radius);margin:18px 0;max-width:100%;height:auto}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:rgba(47,109,255,.14);color:#fff;font-weight:600;white-space:nowrap}
.prose hr{border:0;border-top:1px solid var(--line);margin:26px 0}
.prose code{background:rgba(55,211,255,.1);border-radius:6px;padding:2px 6px;font-size:14px;color:#9fe6ff}

/* 内容块 */
.block{margin-top:44px}
.block-head{margin-bottom:20px;max-width:760px}
.block-head h2{font-size:21px;line-height:1.5;font-weight:700;color:#fff;margin-bottom:10px}
.block-head p{color:var(--muted);font-size:15px;line-height:1.85}
.dim-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.dim-card{
  min-width:0;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px 18px 16px;
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.dim-card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow);background:var(--panel-2)}
.dim-card h3{font-size:15.5px;font-weight:700;color:#fff;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.dim-card h3::before{content:"";width:6px;height:6px;border-radius:2px;background:linear-gradient(135deg,#2f6dff,#37d3ff);box-shadow:0 0 8px rgba(55,211,255,.8)}
.dim-card p{font-size:14px;line-height:1.8;color:var(--muted);margin:0}
.note-panel{
  margin-top:18px;
  padding:18px 20px;
  border-radius:var(--radius);
  border:1px solid rgba(255,180,84,.28);
  background:rgba(255,180,84,.07);
  color:#f0d7b4;
  font-size:14.5px;line-height:1.85;
}
.note-panel strong{color:#ffcf8a}
.cost-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.cost-item{
  min-width:0;padding:18px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--panel);
}
.cost-item h3{font-size:15.5px;color:#fff;margin-bottom:8px}
.cost-item p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}
.check-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  min-width:0;padding:14px 16px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:var(--panel);
  font-size:14.5px;line-height:1.7;color:#cfdcf1;
}
.check-list .idx{
  flex:0 0 22px;width:22px;height:22px;border-radius:7px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:#04122b;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  margin-top:1px;
}
.download-band{
  margin-top:46px;padding:26px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line-strong);
  background:linear-gradient(135deg,rgba(47,109,255,.2),rgba(55,211,255,.07));
  box-shadow:var(--shadow);
}
.download-band h2{font-size:20px;color:#fff;margin-bottom:8px}
.download-band p{font-size:14.5px;color:var(--muted);line-height:1.85}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.dl-btn{
  display:flex;flex-direction:column;gap:4px;min-width:0;
  padding:14px 16px;border-radius:var(--radius-sm);
  background:rgba(5,10,22,.6);
  border:1px solid var(--line);
  color:var(--text);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease,color .2s ease;
}
.dl-btn strong{font-size:15px;font-weight:700}
.dl-btn span{font-size:12.5px;color:var(--muted-2)}
.dl-btn:hover,.dl-btn:focus{border-color:var(--primary-2);transform:translateY(-2px);box-shadow:var(--glow);color:#fff}
.channel-card{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:20px 24px;border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--panel);
}
.channel-card .ch-text{min-width:0}
.channel-card h3{font-size:16.5px;color:#fff;margin-bottom:6px}
.channel-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:0;max-width:560px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--panel);
  overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item[open]{border-color:var(--line-strong);background:var(--panel-2)}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:16px 18px;
  font-size:15.5px;font-weight:600;color:#eaf2ff;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:18px;line-height:1;color:var(--primary-2);transition:transform .22s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 18px 18px;font-size:14.5px;line-height:1.85;color:var(--muted)}
.cta-band{
  margin-top:46px;padding:28px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,109,255,.24),rgba(55,211,255,.08));
  display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
}
.cta-band h2{font-size:20px;color:#fff;margin-bottom:8px}
.cta-band p{font-size:14.5px;color:var(--muted);line-height:1.85;max-width:600px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.article-empty{
  padding:46px 30px;text-align:center;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:var(--panel);
}
.article-empty h2{font-size:20px;color:#fff;margin-bottom:10px}
.article-empty p{color:var(--muted);font-size:15px;margin-bottom:22px}

/* 页脚 */
.site-footer{
  border-top:1px solid rgba(110,160,255,.14);
  background:linear-gradient(180deg,rgba(8,16,34,.9),rgba(4,8,18,.98));
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:34px;align-items:start;
}
.footer-brand{min-width:0}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.9;color:var(--muted-2);max-width:420px}
.footer-col{min-width:0}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.6px;margin-bottom:14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--primary-2)}
.footer-bottom{
  margin-top:38px;padding-top:20px;
  border-top:1px solid rgba(110,160,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted-2);line-height:1.8;
}

@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:34px}
  .article-main{max-width:none}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 260px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:860px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(6,12,26,.98);
    border-bottom:1px solid var(--line);
    padding:12px 18px 18px;
    box-shadow:0 24px 40px rgba(0,6,20,.6);
  }
  body.nav-open .site-nav{display:flex}
  .site-nav a{padding:12px 14px;border-radius:12px;font-size:15px}
  .nav-dl{margin-left:0;justify-content:center}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .article-hero{padding:32px 0 28px}
  .article-section{padding:34px 0 56px}
  .prose{padding:24px 20px;font-size:16px}
  .prose h2{font-size:19px}
  .prose h3{font-size:16.5px}
  .dim-grid,.cost-grid,.check-list,.dl-grid{grid-template-columns:minmax(0,1fr)}
  .block{margin-top:36px}
  .download-band,.cta-band,.channel-card{padding:20px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .site-footer{padding:44px 0 22px}
}
@media (max-width:520px){
  .brand-name{font-size:16.5px}
  .brand-sub{font-size:11px;letter-spacing:1.2px}
  .article-hero h1{font-size:22px}
  .article-lead{font-size:15px;padding-left:13px}
  .btn{width:100%}
  .cta-actions{width:100%}
  .prose{padding:20px 16px;font-size:15.5px}
  .check-list li{font-size:14px}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* roulang page: category1 */
:root{
  --bg:#050a16;
  --bg-soft:#070f22;
  --bg-panel:#0a1428;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.16);
  --line-strong:rgba(110,160,255,.34);
  --text:#e9effb;
  --muted:#94a7c6;
  --muted-2:#6f83a4;
  --primary:#2f6dff;
  --primary-2:#37d3ff;
  --warn:#ffb454;
  --danger:#ff6b7a;
  --ok:#3ddc97;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 20px 48px rgba(0,8,32,.55);
  --glow:0 12px 34px rgba(47,109,255,.38);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0 0 .55em;font-weight:700;line-height:1.38;color:var(--text)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--primary-2);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#7fe4ff}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:76px 0;position:relative}
.section--alt{background:linear-gradient(180deg,rgba(10,20,40,.85),rgba(5,10,22,.18))}
.section-head{max-width:820px;margin-bottom:38px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);letter-spacing:.4px;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1px;color:var(--primary-2);
  background:rgba(55,211,255,.08);
  border:1px solid rgba(55,211,255,.28);
  border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 10px var(--primary-2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#2f6dff,#37d3ff);color:#04122b;box-shadow:var(--glow)}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 18px 42px rgba(47,109,255,.55);color:#03101f}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(55,211,255,.12);border-color:var(--primary-2);transform:translateY(-2px);color:#fff}
.btn:active{transform:translateY(0)}
.btn:focus-visible,a:focus-visible,summary:focus-visible,.check-item input:focus-visible{outline:2px solid var(--primary-2);outline-offset:3px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,22,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(110,160,255,.14);
}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand:hover{color:#fff}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  background:linear-gradient(140deg,#2f6dff,#37d3ff);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:#03101f;
  box-shadow:0 10px 26px rgba(47,109,255,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--muted-2);letter-spacing:1.6px}
.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{
  display:inline-flex;align-items:center;
  padding:9px 16px;border-radius:999px;
  font-size:15px;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.site-nav a:hover{background:rgba(55,211,255,.1);color:var(--text)}
.site-nav a.is-active{background:rgba(55,211,255,.14);color:var(--primary-2);font-weight:600}
.nav-dl{
  margin-left:10px;
  background:linear-gradient(135deg,#2f6dff,#37d3ff);
  color:#04122b !important;font-weight:700;
  box-shadow:0 8px 22px rgba(47,109,255,.4);
}
.nav-dl:hover{transform:translateY(-1px)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  cursor:pointer;color:var(--text);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* category hero */
.cat-hero{position:relative;padding:52px 0 68px;overflow:hidden;border-bottom:1px solid rgba(110,160,255,.1)}
.cat-hero::before{
  content:"";position:absolute;inset:-25% -10% auto -10%;height:640px;
  background:
    radial-gradient(circle at 18% 26%,rgba(47,109,255,.34),transparent 58%),
    radial-gradient(circle at 82% 12%,rgba(55,211,255,.2),transparent 55%);
  filter:blur(8px);pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted-2);margin-bottom:20px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary-2)}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:start}
.cat-hero h1{font-size:clamp(26px,3.2vw,40px);line-height:1.34;font-weight:800;letter-spacing:.4px;margin-bottom:20px}
.hero-desc{color:var(--muted);font-size:16px;line-height:1.9;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-panel{
  background:linear-gradient(160deg,rgba(20,36,70,.92),rgba(9,18,38,.94));
  border:1px solid var(--line-strong);
  border-radius:var(--radius-lg);
  padding:24px 24px 20px;
  box-shadow:var(--shadow);
  min-width:0;
}
.hero-panel-head{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:6px}
.panel-dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok);flex:0 0 8px}
.panel-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(110,160,255,.14);font-size:14.5px}
.panel-list li:last-child{border-bottom:0}
.panel-list span{min-width:0}
.tag{font-size:12px;line-height:1.6;padding:2px 10px;border-radius:999px;border:1px solid transparent;white-space:nowrap;font-style:normal}
.tag-info{color:var(--primary-2);background:rgba(55,211,255,.1);border-color:rgba(55,211,255,.32)}
.tag-warn{color:var(--warn);background:rgba(255,180,84,.1);border-color:rgba(255,180,84,.35)}
.tag-ok{color:var(--ok);background:rgba(61,220,151,.1);border-color:rgba(61,220,151,.35)}
.hero-panel-foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted-2);line-height:1.75}

/* metrics */
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.metric-card{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px;min-width:0;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.metric-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(0,8,32,.5);background:var(--panel-2)}
.metric-num{
  font-size:34px;font-weight:800;line-height:1.1;
  background:linear-gradient(120deg,#7fb2ff,#37d3ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-label{font-size:15px;font-weight:600;margin-top:6px}
.metric-desc{font-size:13.5px;color:var(--muted-2);margin:8px 0 0;line-height:1.7}

/* dimensions */
.dim-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dim-card{
  position:relative;overflow:hidden;min-width:0;
  background:linear-gradient(165deg,rgba(16,30,60,.9),rgba(8,16,34,.92));
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.dim-card::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:190px;height:190px;
  background:radial-gradient(circle,rgba(47,109,255,.32),transparent 70%);
  opacity:0;transition:opacity .3s ease;pointer-events:none;
}
.dim-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 20px 44px rgba(0,8,32,.5)}
.dim-card:hover::after{opacity:1}
.dim-icon{
  width:44px;height:44px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(55,211,255,.1);border:1px solid rgba(55,211,255,.28);
  color:var(--primary-2);font-size:18px;margin-bottom:16px;
}
.dim-card h3{font-size:17px;margin-bottom:10px}
.dim-card p{color:var(--muted);font-size:14.5px;line-height:1.8;margin-bottom:12px}
.dim-list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--muted-2);margin-bottom:6px;line-height:1.75}
.dim-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--primary-2)}

/* compare */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.compare-card{border-radius:var(--radius-lg);padding:26px 24px;border:1px solid var(--line);background:var(--panel);min-width:0}
.compare-card--risk{border-color:rgba(255,107,122,.28);background:rgba(255,107,122,.05)}
.compare-card--safe{border-color:rgba(61,220,151,.28);background:rgba(61,220,151,.05)}
.compare-card h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:16px}
.compare-card--risk h3 i{color:var(--danger)}
.compare-card--safe h3 i{color:var(--ok)}
.compare-card li{position:relative;padding-left:26px;margin-bottom:12px;font-size:14.5px;color:var(--muted);line-height:1.8}
.compare-card li:last-child{margin-bottom:0}
.compare-card li i{position:absolute;left:0;top:4px;font-size:14px}
.compare-card--risk li i{color:var(--danger)}
.compare-card--safe li i{color:var(--ok)}

/* timeline */
.timeline{display:grid;gap:16px}
.timeline-item{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;min-width:0;
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.timeline-item:hover{transform:translateX(3px);border-color:var(--line-strong);background:var(--panel-2)}
.timeline-step{
  width:44px;height:44px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,#2f6dff,#37d3ff);
  color:#04122b;font-weight:800;font-size:16px;
  box-shadow:0 10px 24px rgba(47,109,255,.35);
}
.timeline-body h3{font-size:16.5px;margin-bottom:6px}
.timeline-body p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.8}

/* safeguards */
.safeguard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.safeguard-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;min-width:0;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.safeguard-card:hover{border-color:var(--line-strong);box-shadow:0 18px 40px rgba(0,8,32,.45);transform:translateY(-2px)}
.safeguard-card h3{display:flex;align-items:center;gap:10px;font-size:16.5px;margin-bottom:10px}
.safeguard-card h3 i{color:var(--primary-2);font-size:15px}
.safeguard-card p{font-size:14.5px;color:var(--muted);line-height:1.85;margin:0}

/* faq */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:0 22px;transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:var(--line-strong);background:rgba(55,211,255,.06)}
.faq-item summary{
  cursor:pointer;padding:18px 0;font-size:16px;font-weight:600;
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;line-height:1;color:var(--primary-2);transition:transform .22s ease;flex:0 0 auto}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{color:var(--muted);font-size:14.8px;line-height:1.9;margin:0 0 20px}

/* self check */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;min-width:0;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;font-size:14.5px;color:var(--muted);cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.check-item:hover{border-color:var(--line-strong);color:var(--text);background:var(--panel-2)}
.check-item input{
  appearance:none;-webkit-appearance:none;
  width:18px;height:18px;flex:0 0 18px;margin:3px 0 0;
  border-radius:5px;border:1px solid var(--line-strong);
  background:rgba(255,255,255,.04);cursor:pointer;position:relative;
  transition:background .2s ease,border-color .2s ease;
}
.check-item input:checked{background:linear-gradient(135deg,#2f6dff,#37d3ff);border-color:transparent}
.check-item input:checked::after{
  content:"";position:absolute;left:5px;top:2px;width:5px;height:9px;
  border-right:2px solid #04122b;border-bottom:2px solid #04122b;transform:rotate(45deg);
}
.check-item span{min-width:0;line-height:1.7}
.check-meter{margin-top:24px}
.check-progress{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden}
.check-progress span{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,#2f6dff,#37d3ff);transition:width .3s ease}
.check-count{margin-top:10px;font-size:14px;color:var(--muted-2)}
.check-count b{color:var(--primary-2);font-weight:700}
.cta-band{
  margin-top:34px;border-radius:var(--radius-lg);padding:30px 32px;
  background:linear-gradient(135deg,rgba(47,109,255,.22),rgba(55,211,255,.1));
  border:1px solid var(--line-strong);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.cta-band h3{font-size:19px;margin:0 0 6px}
.cta-band p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* updates */
.updates-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
  display:flex;flex-direction:column;min-width:0;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(0,8,32,.45);background:var(--panel-2)}
.post-meta{display:flex;flex-wrap:wrap;gap:10px;font-size:12.5px;color:var(--muted-2);margin-bottom:12px}
.post-meta span{padding:2px 10px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03)}
.post-title{display:block;font-size:16.5px;font-weight:600;color:var(--text);line-height:1.6;margin-bottom:10px}
.post-title:hover{color:var(--primary-2)}
.post-sum{font-size:14px;color:var(--muted);line-height:1.8;margin:0}
.empty-note{
  color:var(--muted-2);font-size:14.5px;
  background:var(--panel);border:1px dashed var(--line-strong);
  border-radius:var(--radius);padding:22px 24px;margin:0;
}

/* download */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  min-width:0;text-align:center;
  background:linear-gradient(165deg,rgba(16,30,60,.92),rgba(8,16,34,.94));
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:var(--primary-2);box-shadow:var(--glow)}
.dl-icon{font-size:30px;color:var(--primary-2);margin-bottom:14px;line-height:1}
.dl-card h3{font-size:17px;margin-bottom:6px}
.dl-card p{font-size:13.5px;color:var(--muted-2);margin-bottom:18px;line-height:1.75}
.dl-card .btn{width:100%}
.dl-note{margin-top:22px;font-size:13.5px;color:var(--muted-2);line-height:1.85}

/* footer */
.site-footer{background:#040814;border-top:1px solid rgba(110,160,255,.14);padding:56px 0 24px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,minmax(0,1fr));gap:36px}
.footer-brand p{color:var(--muted-2);font-size:14px;line-height:1.9;margin:16px 0 0;max-width:360px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--text)}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:14px}
.footer-col a:hover{color:var(--primary-2)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:38px;padding-top:20px;
  border-top:1px solid rgba(110,160,255,.12);
  font-size:13px;color:var(--muted-2);line-height:1.8;
}

@media (max-width:1024px){
  .cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dim-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .updates-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-header .site-nav{gap:2px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    background:rgba(6,12,26,.98);
    border-bottom:1px solid var(--line);
    padding:14px 20px 20px;
    display:none;
  }
  .site-header.nav-open .site-nav{display:flex}
  .site-nav a{padding:12px 14px;justify-content:flex-start}
  .nav-dl{margin-left:0;justify-content:center !important}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .cat-hero{padding:40px 0 54px}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .safeguard-grid{grid-template-columns:minmax(0,1fr)}
  .dl-grid{grid-template-columns:minmax(0,1fr)}
  .check-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 22px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .metric-grid,.dim-grid,.updates-grid,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .timeline-item{grid-template-columns:minmax(0,1fr);gap:12px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}