/* roulang page: index */
:root{
  --page-bg:#061223;
  --surface:#0A1C35;
  --glass-bg:rgba(14,32,60,.62);
  --glass-strong:rgba(9,23,42,.88);
  --glass-border:rgba(147,197,255,.12);
  --line-accent:rgba(86,205,255,.5);
  --primary:#35B8FF;
  --gradient:#1E82F7,#40C7FF;
  --cyan:#2CE6DC;
  --violet:#877BFF;
  --gold:#D8B477;
  --text-main:#ECF2FC;
  --text-sub:#A7B9D6;
  --text-weak:#6B7D9B;
  --error:#E5636B;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-xl:24px;
  --shadow-default:0 8px 30px rgba(2,8,20,.35);
  --shadow-glow:0 0 0 1px rgba(96,205,255,.2),0 0 30px rgba(52,184,255,.28);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono","JetBrains Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background:var(--page-bg);
  color:var(--text-main);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
ul,ol,dl,p,figure,blockquote{margin:0;padding:0}
a{color:inherit;text-decoration:none}
button{border:0;background:none;font:inherit;color:inherit;cursor:pointer}
input,select,textarea{font:inherit}
address{font-style:normal}
h1,h2,h3,h4,p,figure{margin:0}
:focus-visible{outline:3px solid rgba(53,184,255,.42);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:22px;padding-right:22px}
.section{padding:clamp(4.5rem,9vw,7.2rem) 0}
.section-head{margin-bottom:2.5rem}
.section-title{
  font-size:clamp(1.9rem,3.6vw,2.75rem);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.02em;
}
.section-intro{
  margin-top:.9em;
  font-size:1.06rem;
  color:var(--text-sub);
  max-width:780px;
  line-height:1.85;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  font-size:.8rem;
  letter-spacing:.08em;
  color:var(--cyan);
  margin-bottom:.85rem;
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:18px;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--primary));
  border-radius:2px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:.7rem 1.35rem;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:.98rem;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#1E82F7,#40C7FF);
  color:#fff;
  box-shadow:0 8px 26px rgba(46,145,255,.28),0 0 0 1px rgba(98,206,255,.14) inset;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 34px rgba(46,171,255,.4);
  color:#fff;
}
.btn-primary:active{transform:translateY(0);filter:brightness(.93)}
.btn-secondary{
  background:rgba(14,32,60,.46);
  border:1px solid rgba(147,197,255,.24);
  color:var(--text-main);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.btn-secondary:hover{transform:translateY(-2px);border-color:rgba(86,205,255,.6);box-shadow:0 8px 22px rgba(2,10,25,.28)}
.btn-secondary:active{transform:translateY(0);color:#fff}
.btn-text{
  padding-left:.2rem;
  padding-right:.35rem;
  min-height:34px;
  color:var(--primary);
}
.btn-text::after{content:"→";margin-left:8px;transition:transform .2s}
.btn-text:hover::after{transform:translateX(3px)}
.btn-lg{min-height:54px;padding:1rem 2rem;border-radius:12px;font-size:1.05rem}
.btn-sm{min-height:38px;padding:.45rem 1rem;font-size:.9rem}
.btn-block{width:100%}
.btn.is-disabled{opacity:.45;cursor:not-allowed;pointer-events:none}
.glass-panel{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  box-shadow:var(--shadow-default);
}
@supports not (backdrop-filter: blur(1px)){
  .glass-panel,.btn-secondary{background:rgba(10,28,53,.92)}
}
.tag{
  display:inline-flex;
  align-items:center;
  min-height:26px;
  padding:.15rem .7rem;
  border-radius:6px;
  font-size:.8rem;
  color:var(--cyan);
  background:rgba(44,230,220,.08);
  border:1px solid rgba(44,230,220,.16);
}

/* ============ site header ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  padding:.8rem 0;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease,padding .25s ease;
  border-bottom:1px solid transparent;
  background:transparent;
}
.site-header.is-scrolled{
  padding:.45rem 0;
  background:rgba(6,18,35,.86);
  backdrop-filter:blur(18px) saturate(135%);
  -webkit-backdrop-filter:blur(18px) saturate(135%);
  border-bottom:1px solid rgba(147,197,255,.12);
  box-shadow:0 10px 30px rgba(1,6,18,.28);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  min-height:58px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:.65rem;
  flex-shrink:0;
}
.brand-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:42px;
  height:42px;
  border-radius:12px;
  font-family:var(--mono);
  font-weight:800;
  letter-spacing:.05em;
  color:#fff;
  font-size:1.05rem;
  background:linear-gradient(145deg,#162c52,#0d2342);
  border:1px solid rgba(96,205,255,.36);
  box-shadow:0 0 18px rgba(52,184,255,.22);
}
.brand-text{
  font-size:1.35rem;
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.primary-nav{
  display:flex;
  align-items:center;
  gap:1.35rem;
}
.nav-link{
  position:relative;
  font-size:.98rem;
  font-weight:500;
  color:var(--text-sub);
  padding:.45rem 0;
  transition:color .18s ease;
}
.nav-link:hover{color:#fff}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:100%;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--violet));
  transition:right .2s ease;
}
.nav-link:hover::after,.nav-link.active::after{right:0}
.nav-link.active{color:#fff}
.header-actions{
  display:flex;
  align-items:center;
  gap:.85rem;
}
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid rgba(147,197,255,.2);
  background:rgba(14,32,60,.4);
}
.nav-burger{display:none}
.drawer-mask{
  display:flex;
  align-items:center;
}
.drawer-toggle{
  font-size:1.55rem;
  line-height:1;
}
.mobile-drawer{
  position:fixed;
  top:0;right:-100%;
  width:min(86vw,390px);
  height:100%;
  z-index:160;
  background:rgba(6,18,35,.92);
  backdrop-filter:blur(22px) saturate(140%);
  -webkit-backdrop-filter:blur(22px) saturate(140%);
  border-left:1px solid rgba(147,197,255,.16);
  display:flex;
  flex-direction:column;
  padding:2.5rem 1.6rem;
  transition:right .28s ease;
  overflow-y:auto;
}
.mobile-drawer.is-open{right:0}
.drawer-close{
  align-self:flex-end;
  font-size:1.6rem;
  width:44px;height:44px;
  line-height:1;
  border-radius:10px;
  border:1px solid rgba(147,197,255,.16);
  margin-bottom:1.5rem;
}
.drawer-nav{
  display:grid;
  gap:.35rem;
}
.drawer-link{
  padding:1rem .5rem;
  font-size:1.1rem;
  font-weight:600;
  border-bottom:1px solid rgba(147,197,255,.08);
  color:var(--text-main);
}
.drawer-link.active{color:var(--primary)}
.drawer-cta{margin-top:2rem}
.drawer-brand{
  font-size:1.15rem;
  font-weight:700;
  display:flex;
  align-items:center;
  gap:.55rem;
  margin-bottom:1.6rem;
}
.drawer-brand .brand-badge{min-width:34px;height:34px;font-size:.85rem;border-radius:9px}

/* ============ hero ============ */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding-top:7.5rem;
  padding-bottom:4rem;
}
.hero-bg{
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 18% 18%,rgba(34,205,218,.22),transparent 32%),
    radial-gradient(circle at 82% 16%,rgba(113,84,255,.28),transparent 38%),
    radial-gradient(circle at 75% 88%,rgba(216,180,119,.12),transparent 30%),
    linear-gradient(180deg,rgba(4,10,24,.32),rgba(6,18,35,.96)),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(5,13,28,.82),rgba(6,18,35,.35) 58%,rgba(6,18,35,.7));
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.32fr) minmax(320px,.68fr);
  gap:clamp(2rem,5vw,5.5rem);
  align-items:center;
}
.hero-copy .eyebrow{color:var(--cyan)}
.hero-title{
  margin-top:.4rem;
  font-size:clamp(2.5rem,6vw,4.4rem);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.025em;
}
.hero-sub{
  margin-top:1.3rem;
  max-width:700px;
  font-size:clamp(1rem,1.5vw,1.2rem);
  color:var(--text-sub);
  line-height:1.9;
}
.hero-cta-row{
  margin-top:2.4rem;
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
}
.hero-meta{
  margin-top:2.4rem;
  display:flex;
  flex-wrap:wrap;
  gap:1.8rem;
  color:var(--text-sub);
  font-size:.9rem;
}
.hero-meta span{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
}
.hero-dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(44,230,220,.75);
}
.entry-card{
  padding:1.7rem 1.6rem;
  position:relative;
  overflow:hidden;
}
.entry-card::before,.glass-panel::after{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.38),transparent);
  pointer-events:none;
}
.entry-card-label{
  font-size:.8rem;
  letter-spacing:.08em;
  color:var(--primary);
  font-weight:600;
}
.entry-card-title{
  font-size:1.15rem;
  font-weight:700;
  margin-top:.7rem;
}
.entry-status{
  margin-top:1.3rem;
  display:grid;
  gap:.75rem;
}
.entry-status-line{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:.93rem;
  padding-bottom:.7rem;
  border-bottom:1px dashed rgba(147,197,255,.14);
}
.entry-status-line span{color:var(--text-sub)}
.entry-status-line strong{font-weight:600;font-size:.9rem}
.is-online{color:#3be9a3;display:inline-flex;align-items:center;gap:.45rem}
.entry-note{
  margin-top:1.2rem;
  font-size:.85rem;
  color:var(--text-weak);
  line-height:1.7;
}
.entry-card-actions{
  margin-top:1.4rem;
  display:flex;
  flex-wrap:wrap;
  gap:.75rem;
}

/* ============ status strip ============ */
.status-strip{
  border-top:1px solid rgba(147,197,255,.1);
  border-bottom:1px solid rgba(147,197,255,.1);
  background:rgba(8,20,40,.62);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  position:relative;
  z-index:4;
}
.status-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
}
.status-cell{
  padding:1.2rem 1rem;
  border-right:1px solid rgba(147,197,255,.08);
  text-align:center;
  display:grid;
  gap:.3rem;
}
.status-cell:last-child{border-right:0}
.status-value{
  font-family:var(--mono);
  font-size:1.55rem;
  font-weight:700;
  color:var(--text-main);
  letter-spacing:-.04em;
  line-height:1.1;
}
.status-name{font-size:.9rem;color:var(--text-sub)}

/* ============ compare ============ */
.compare-section{background:linear-gradient(180deg,rgba(6,18,35,0),rgba(8,21,44,.58),rgba(6,18,35,0))}
.compare-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:1.5rem;
}
.compare-head .section-intro{margin-bottom:0}
.table-scroll{
  border-radius:var(--radius-lg);
  overflow-x:auto;
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-default);
  background:rgba(8,19,38,.68);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.compare-table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  min-width:780px;
  font-size:.98rem;
}
.compare-table th,.compare-table td{
  padding:1.05rem 1.1rem;
  text-align:left;
  border-bottom:1px solid rgba(147,197,255,.1);
  vertical-align:middle;
}
.compare-table thead th{
  position:sticky;
  top:0;
  background:rgba(8,20,39,.96);
  z-index:5;
  font-weight:700;
  color:var(--text-main);
  letter-spacing:.02em;
  border-bottom:1px solid rgba(147,197,255,.15);
}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody th{
  color:var(--text-main);
  font-weight:600;
}
.compare-table td{color:var(--text-sub)}
.compare-table .table-plan-col{
  background:rgba(13,30,58,.96);
  border-left:1px solid rgba(96,205,255,.18);
  border-right:1px solid rgba(96,205,255,.18);
  min-width:180px;
  position:relative;
}
.compare-card-col{background:rgba(11,26,50,.8)}
.plan-highlight{
  box-shadow:var(--shadow-glow);
  position:relative;
}
.vip-badge{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  font-size:.76rem;
  color:var(--gold);
  border:1px solid rgba(216,180,119,.42);
  background:rgba(216,180,119,.07);
  padding:.2rem .6rem;
  border-radius:6px;
  margin-left:.5rem;
  font-weight:600;
  letter-spacing:.04em;
  vertical-align:middle;
}
.feature-mark-yes{color:var(--cyan);font-weight:600}
.feature-mark-no{color:var(--text-weak)}
.compare-cta{
  margin-top:1.6rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}
.compare-note{
  font-size:.9rem;
  color:var(--text-weak);
}

/* ============ levels ============ */
.levels-section{background:radial-gradient(circle at 12% 30%,rgba(30,130,247,.08),transparent 38%),radial-gradient(circle at 90% 65%,rgba(135,123,255,.08),transparent 32%)}
.levels-grid{
  display:grid;
  gap:1rem;
}
.level-row{
  display:grid;
  grid-template-columns:76px 1fr auto;
  align-items:center;
  gap:1.5rem;
  background:rgba(10,23,45,.88);
  border:1px solid rgba(147,197,255,.12);
  border-radius:var(--radius-md);
  padding:1.4rem 1.5rem;
  box-shadow:var(--shadow-default);
  transition:border-color .2s ease,transform .2s ease;
  position:relative;
  overflow:hidden;
}
.level-row:hover{
  border-color:rgba(86,205,255,.44);
  transform:translateY(-2px);
}
.level-row::before{
  content:attr(data-grade);
  position:absolute;
  right:1rem;
  top:-.6rem;
  font-family:var(--mono);
  font-size:5.2rem;
  font-weight:800;
  color:rgba(147,197,255,.03);
  letter-spacing:-.08em;
}
.level-count{
  font-family:var(--mono);
  font-size:1.25rem;
  font-weight:700;
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  width:60px;height:60px;
  border-radius:16px;
  border:1px solid rgba(86,205,255,.3);
  background:rgba(53,184,255,.07);
}
.level-row.is-gold .level-count{
  color:var(--gold);
  border-color:rgba(216,180,119,.4);
  background:rgba(216,180,119,.06);
}
.level-body h3{
  font-size:1.2rem;
  font-weight:700;
  letter-spacing:-.01em;
}
.level-body p{
  color:var(--text-sub);
  font-size:.95rem;
  margin-top:.45rem;
  line-height:1.75;
  max-width:660px;
}
.level-status{
  text-align:right;
  display:flex;
  align-items:center;
  gap:1rem;
  z-index:2;
}
.level-state{
  font-size:.82rem;
  display:flex;
  align-items:center;
  gap:.5rem;
  color:var(--text-sub);
}
.level-state::before{
  content:"";
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--cyan);
}
.level-state.locked::before{
  background:var(--text-weak);
}
.level-action{min-width:118px}

/* ============ preview ============ */
.preview-section{
  background:
    radial-gradient(circle at 82% 25%,rgba(135,123,255,.15),transparent 30%),
    transparent;
}
.preview-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:1.7rem;
}
.preview-media-card{
  position:relative;
  border-radius:var(--radius-xl);
  overflow:hidden;
  min-height:340px;
  display:flex;
  align-items:flex-end;
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-default);
}
.preview-media-card img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.preview-cover-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(4,11,24,.05) 22%,rgba(4,11,24,.78));
}
.preview-lock-badge{
  position:absolute;
  top:1.3rem;right:1.3rem;
  width:52px;height:52px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  color:#fff;
  font-size:1.2rem;
  border:1px solid rgba(255,255,255,.28);
  background:rgba(6,18,35,.66);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:var(--shadow-default);
}
.preview-card-text{
  position:relative;
  padding:1.8rem;
  color:#f3f6fd;
  width:100%;
}
.preview-card-tag{font-size:.78rem;letter-spacing:.1em;color:var(--cyan)}
.preview-card-text h3{
  font-size:clamp(1.25rem,2.6vw,1.9rem);
  font-weight:700;
  margin-top:.6rem;
}
.preview-card-text p{
  margin-top:.65rem;
  color:rgba(236,242,252,.82);
  line-height:1.75;
  max-width:650px;
  font-size:.98rem;
}
.preview-actions{
  margin-top:1.3rem;
  display:flex;
  flex-wrap:wrap;
  gap:.8rem;
}
.preview-list{
  display:grid;
  gap:1.1rem;
  align-content:stretch;
}
.preview-item{
  display:flex;
  gap:1rem;
  align-items:center;
  padding:1.1rem 1.2rem;
  border-radius:var(--radius-md);
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .2s ease,border-color .2s ease;
}
.preview-item:hover{
  transform:translateY(-2px);
  border-color:rgba(86,205,255,.5);
}
.preview-thumb{
  width:86px;height:86px;
  flex-shrink:0;
  border-radius:14px;
  object-fit:cover;
  border:1px solid rgba(147,197,255,.13);
}
.preview-info{
  flex:1;
  min-width:0;
  font-size:.92rem;
}
.preview-info h4{
  font-size:1rem;
  line-height:1.5;
  font-weight:600;
}
.preview-info p{
  color:var(--text-sub);
  line-height:1.6;
  font-size:.83rem;
  margin-top:.3rem;
  overflow:hidden;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
}
.preview-lock-mini{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;height:32px;
  border-radius:8px;
  border:1px solid rgba(147,197,255,.2);
  color:var(--text-sub);
  flex-shrink:0;
}

/* ============ news / cms ============ */
.news-section{
  background:radial-gradient(circle at 10% 10%,rgba(44,230,220,.05),transparent 32%),rgba(6,18,35,.4);
  border-top:1px solid rgba(147,197,255,.08);
  border-bottom:1px solid rgba(147,197,255,.08);
}
.news-split{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:1.7rem;
}
.news-feature{
  display:block;
  background:rgba(10,24,46,.94);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  min-height:300px;
  box-shadow:var(--shadow-default);
  transition:border-color .2s ease,transform .2s ease;
}
.news-feature:hover{
  border-color:rgba(86,205,255,.55);
  transform:translateY(-2px);
}
.news-feature-body{padding:1.6rem 1.4rem}
.news-feature-cat{
  display:flex;
  align-items:center;
  gap:.6rem;
  flex-wrap:wrap;
  font-size:.82rem;
  color:var(--text-weak);
}
.news-feature h3{
  margin-top:1rem;
  font-size:1.42rem;
  font-weight:700;
  line-height:1.45;
  transition:color .18s;
}
.news-feature:hover h3{color:var(--primary)}
.news-feature-summary{
  margin-top:.8rem;
  color:var(--text-sub);
  font-size:.95rem;
  line-height:1.8;
  overflow:hidden;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
}
.news-feature-meta{
  margin-top:1.2rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-top:1px dashed rgba(147,197,255,.13);
  padding-top:1rem;
  font-size:.84rem;
  color:var(--text-weak);
}
.news-side{
  display:grid;
  gap:1.1rem;
  align-content:start;
}
.news-item{
  background:rgba(10,23,45,.82);
  border:1px solid rgba(147,197,255,.1);
  border-radius:var(--radius-md);
  padding:1.2rem 1.25rem;
  display:flex;
  flex-direction:column;
  gap:.55rem;
  transition:border-color .18s ease,transform .18s ease;
}
.news-item:hover{
  border-color:rgba(86,205,255,.5);
  transform:translateX(-3px);
}
.news-list-head{
  display:flex;
  align-items:center;
  gap:.55rem;
  font-size:.78rem;
  color:var(--text-weak);
}
.news-list-title{
  font-size:1.06rem;
  font-weight:600;
  line-height:1.5;
}
.news-item:hover .news-list-title{color:var(--primary)}
.news-empty{
  grid-column:1/-1;
  background:rgba(10,22,44,.7);
  border:1px dashed rgba(147,197,255,.2);
  color:var(--text-sub);
  padding:2.4rem;
  border-radius:var(--radius-lg);
  text-align:center;
}
.news-time{
  font-family:var(--mono);
  font-size:.78rem;
}
.news-arrow{
  font-size:1.3rem;
  color:var(--text-weak);
}

/* ============ FAQ ============ */
.faq-wrap{
  max-width:860px;
}
.faq-item{
  border-bottom:1px solid rgba(147,197,255,.12);
}
.faq-item:first-child{border-top:1px solid rgba(147,197,255,.12)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.2rem;
  min-height:58px;
  padding:1.1rem .4rem;
  font-size:1.05rem;
  font-weight:600;
  color:var(--text-main);
  transition:color .18s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-icon{
  flex-shrink:0;
  width:28px;
  height:28px;
  border-radius:8px;
  border:1px solid rgba(147,197,255,.2);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.1rem;
  font-weight:400;
  color:var(--text-sub);
  transition:transform .2s,background .2s,color .2s;
}
.faq-item[open] .faq-icon{
  transform:rotate(45deg);
  background:rgba(53,184,255,.12);
  color:var(--primary);
}
.faq-answer{
  position:relative;
  margin:.3rem 0 1.3rem;
  padding:.8rem 1rem .6rem 1.5rem;
  color:var(--text-sub);
  font-size:1rem;
  line-height:1.85;
}
.faq-answer::before{
  content:"";
  position:absolute;
  left:.1rem;top:.9rem;bottom:1.2rem;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--primary));
}

/* ============ CTA ============ */
.cta-section{
  position:relative;
  padding:clamp(4rem,10vw,7rem) 0;
}
.cta-intro-card{
  position:relative;
  border-radius:var(--radius-xl);
  overflow:hidden;
  border:1px solid rgba(147,197,255,.14);
  background:
    linear-gradient(115deg,rgba(6,17,36,.82),rgba(5,16,34,.72)),
    radial-gradient(circle at 80% 28%,rgba(53,184,255,.2),transparent 36%),
    url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  padding:clamp(2rem,6vw,4.2rem);
  color:#fff;
}
.cta-inner{
  position:relative;
  z-index:2;
  max-width:730px;
}
.cta-inner h2{
  font-size:clamp(2rem,4.6vw,3.2rem);
  font-weight:800;
  line-height:1.25;
}
.cta-inner p{
  margin-top:1.1rem;
  font-size:1.1rem;
  color:var(--text-sub);
  line-height:1.85;
  max-width:650px;
}
.cta-actions{
  margin-top:2.2rem;
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
}
.cta-actions .btn-primary{
  position:relative;
}
.cta-actions .btn-primary::after{
  content:"";
  position:absolute;
  inset:-4px;
  border-radius:14px;
  padding:1px;
  background:linear-gradient(135deg,rgba(44,230,220,.4),rgba(135,123,255,.35));
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  animation:ctaPulse 2.8s ease-in-out infinite;
  pointer-events:none;
}
@keyframes ctaPulse{
  0%,100%{opacity:.45}
  50%{opacity:.9}
}

/* ============ footer ============ */
.site-footer{
  border-top:1px solid rgba(147,197,255,.1);
  background:rgba(4,11,24,.84);
}
.footer-main{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:2.5rem;
  padding:3.8rem 0 3rem;
}
.footer-brand-line{
  display:flex;
  align-items:center;
  gap:.7rem;
}
.footer-title{
  font-size:1.2rem;
  font-weight:800;
}
.footer-desc{
  color:var(--text-sub);
  font-size:.95rem;
  margin-top:1.2rem;
  line-height:1.8;
  max-width:320px;
}
.footer-heading{
  font-size:.95rem;
  font-weight:700;
  margin-bottom:1rem;
  letter-spacing:.02em;
}
.footer-links{
  display:grid;
  gap:.65rem;
}
.footer-link{
  color:var(--text-sub);
  font-size:.95rem;
  transition:color .16s,padding-left .16s;
}
.footer-link:hover{
  color:var(--primary);
  padding-left:4px;
}
.footer-contact{
  display:grid;
  gap:.75rem;
  color:var(--text-sub);
  font-size:.95rem;
  line-height:1.7;
}
.footer-contact strong{color:var(--text-main);font-weight:600}
.footer-bottom{
  border-top:1px solid rgba(147,197,255,.08);
  padding:1.6rem 0;
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
  align-items:center;
  justify-content:space-between;
  color:var(--text-weak);
  font-size:.85rem;
}
.footer-bottom .badge-soft{
  color:var(--text-sub);
}
.footer-bottom-banner{
  color:var(--text-weak);
}
.backcrumb{
  display:inline-flex;
  align-items:center;
  color:var(--text-weak);
  font-size:.86rem;
  transition:color .16s;
}
.backcrumb:hover{color:var(--primary)}

/* ============ responsive ============ */
@media (max-width:1200px){
  .primary-nav{display:none}
  .nav-burger{display:inline-flex}
  .desktop-nav-cta{display:none}
  .hero-inner{grid-template-columns:1fr}
  .entry-card{max-width:560px}
  .status-grid{grid-template-columns:repeat(2,1fr)}
  .status-cell:nth-child(2){border-right:0}
  .status-cell:nth-child(-n+2){border-bottom:1px solid rgba(147,197,255,.08)}
  .level-row{grid-template-columns:70px 1fr auto}
  .preview-grid,.news-split{grid-template-columns:1fr}
}
@media (max-width:1024px){
  .container{padding-left:20px;padding-right:20px}
  .level-status{gap:.7rem}
  .footer-main{grid-template-columns:1fr 1fr}
  .footer-brand-line{grid-column:1/-1}
}
@media (max-width:768px){
  .section{padding:4.3rem 0}
  .section-head{margin-bottom:2rem}
  .section-title{font-size:1.75rem}
  .brand-text{font-size:1.12rem;max-width:210px;white-space:normal}
  .brand-badge{min-width:38px;height:38px}
  .hero{padding-top:6.5rem;padding-bottom:3rem}
  .hero-title{font-size:clamp(2.15rem,8vw,3.5rem)}
  .hero-cta-row{gap:.75rem}
  .hero-cta-row .btn{width:100%}
  .btn-primary,.btn-secondary{justify-content:center}
  .status-grid{grid-template-columns:1fr 1fr}
  .level-row{grid-template-columns:52px 1fr;gap:1rem;padding:1.1rem}
  .level-status{grid-column:2;justify-content:space-between;text-align:left}
  .level-count{width:48px;height:48px;border-radius:12px;font-size:1rem}
  .compare-cta{flex-direction:column;align-items:flex-start}
  .preview-item{flex-wrap:wrap}
  .cta-actions .btn{width:100%}
  .cta-inner h2{font-size:1.8rem}
  .footer-main{grid-template-columns:1fr;gap:2rem;padding-top:3rem}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:640px){
  .header-actions .btn-sm{display:none}
  .status-cell{padding:1rem .8rem}
  .status-value{font-size:1.18rem}
  .level-status{flex-direction:column;align-items:stretch;text-align:left}
  .level-action{justify-content:center;width:100%}
  .level-body p{font-size:.9rem}
  .news-side{grid-template-columns:1fr}
  .footer-main{gap:1.6rem}
  .faq-item summary{font-size:.98rem}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#061223;
  --bg-raised:#0A1C35;
  --glass:rgba(14,32,60,.62);
  --glass-deep:rgba(9,23,42,.88);
  --glass-edge:rgba(147,197,255,.12);
  --line-accent:rgba(86,205,255,.5);
  --primary:#35B8FF;
  --grad:135deg,#1E82F7,#40C7FF;
  --aqua:#2CE6DC;
  --violet:#877BFF;
  --gold:#D8B477;
  --text:#ECF2FC;
  --text-sub:#A7B9D6;
  --text-weak:#6B7D9B;
  --danger:#E5636B;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-xl:24px;
  --shadow:0 8px 30px rgba(2,8,20,.35);
  --glow:0 0 0 1px rgba(96,205,255,.2),0 0 30px rgba(52,184,255,.28);
  --mono:"SF Mono","JetBrains Mono",Consolas,monospace;
  --sans:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background:
    radial-gradient(900px 700px at 12% -5%, rgba(44,230,220,.13), transparent 55%),
    radial-gradient(1000px 760px at 92% 2%, rgba(135,123,255,.11), transparent 52%),
    radial-gradient(1100px 700px at 50% 110%, rgba(216,180,119,.08), transparent 60%),
    linear-gradient(180deg,#04101F 0%, var(--bg) 48%, #040C19 100%);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{width:min(1200px, 100% - 48px);margin:0 auto}
.container-wide{width:min(1280px, 100% - 48px);margin:0 auto}
a:focus-visible,.btn:focus-visible,button:focus-visible,.nav-link:focus-visible{outline:3px solid rgba(53,184,255,.38);outline-offset:3px;border-radius:4px}
::selection{background:rgba(53,184,255,.3);color:#fff}
@supports not (backdrop-filter:blur(16px)){ .glass,.detail-panel,.site-header,.footer-main,.panel{background:rgba(9,23,42,.94) } }
.site-header{position:fixed;inset:0 0 auto;z-index:120;height:74px;transition:background .25s,box-shadow .25s,border-color .25s;backdrop-filter:blur(16px) saturate(130%);-webkit-backdrop-filter:blur(16px) saturate(130%)}
.site-header.scrolled{background:rgba(4,13,26,.92);border-bottom:1px solid rgba(147,197,255,.12);box-shadow:0 18px 44px rgba(1,6,15,.38)}
.header-inner{height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;color:var(--text)}
.brand-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:14px;
  background:linear-gradient(135deg,#1E82F7,#40C7FF);color:#fff;
  font-weight:800;font-size:16px;letter-spacing:.02em;
  box-shadow:0 0 0 1px rgba(139,241,255,.26),0 8px 22px rgba(30,130,247,.28);
}
.brand-text{font-size:1.18rem;font-weight:700;white-space:nowrap;letter-spacing:.02em}
.primary-nav{display:flex;align-items:center;gap:8px}
.nav-link{position:relative;padding:8px 12px;border-radius:10px;color:var(--text-sub);font-size:.92rem;transition:color .2s,background .2s}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,#1E82F7,#2CE6DC);opacity:0;transform:scaleX(.5);transition:.2s}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{opacity:.75;transform:scaleX(1)}
.nav-link.active{color:#fff}
.nav-link.active::after{opacity:1;transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-weight:600;min-height:44px;padding:0 20px;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;cursor:pointer;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,#1E82F7,#40C7FF);color:#081321;box-shadow:0 8px 24px rgba(30,130,247,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(64,199,255,.38)}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-outline{background:rgba(12,29,54,.55);color:var(--text);border-color:rgba(147,197,255,.26)}
.btn-outline:hover{border-color:rgba(86,205,255,.6);color:#fff;background:rgba(24,54,90,.55);transform:translateY(-2px)}
.btn-sm{min-height:38px;padding:0 15px;border-radius:10px;font-size:.88rem}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:11px;border:1px solid rgba(147,197,255,.14);background:rgba(14,32,60,.6);color:var(--text);cursor:pointer;transition:.2s}
.icon-btn:hover{color:#fff;background:rgba(30,60,96,.75);border-color:rgba(86,205,255,.34)}
.nav-burger{display:none}
.mobile-drawer{position:fixed;top:0;right:-340px;width:min(340px,88vw);height:100vh;z-index:160;background:rgba(4,13,27,.94);backdrop-filter:blur(22px) saturate(130%);transition:right .3s ease;border-left:1px solid rgba(147,197,255,.14);box-shadow:-30px 0 70px rgba(0,0,0,.35)}
.mobile-drawer.open{right:0}
.drawer-backdrop{position:fixed;inset:0;background:rgba(2,6,14,.62);backdrop-filter:blur(5px);z-index:150;opacity:0;visibility:hidden;transition:.25s}
.drawer-backdrop.show{opacity:1;visibility:visible}
.drawer-head{height:70px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(147,197,255,.12)}
.drawer-title{font-weight:700;font-size:.95rem;display:flex;align-items:center;gap:8px}
.drawer-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:rgba(28,57,92,.46);color:#fff;border:1px solid rgba(147,197,255,.14);font-size:1.15rem;cursor:pointer}
.mobile-nav{padding:24px 12px;display:flex;flex-direction:column;gap:4px}
.mobile-nav .nav-link{font-size:1.02rem;color:var(--text);padding:13px 14px}
.mobile-nav .nav-link:hover{background:rgba(53,184,255,.1);color:#fff}
.mobile-nav .nav-link::after{display:none}
.mobile-cta{padding:16px 22px}
.page-hero{position:relative;min-height:360px;display:flex;align-items:flex-end;padding:150px 0 60px;background:linear-gradient(180deg,rgba(4,12,25,.7),rgba(6,18,35,.9)),url("/assets/images/backpic/back-3.webp") center/cover no-repeat;border-bottom:1px solid rgba(147,197,255,.1)}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 18% 10%,rgba(44,230,220,.1),transparent 55%)}
.page-hero-inner{position:relative;z-index:1}
.crumb{font-size:.86rem;display:flex;flex-wrap:wrap;align-items:center;gap:6px;color:var(--text-sub);margin-bottom:20px}
.crumb a{color:var(--text-sub);transition:.2s}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--text-weak);font-family:var(--mono)}
.article-title{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:800;line-height:1.35;max-width:880px;color:#fff;letter-spacing:.01em}
.article-meta{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:24px;color:var(--text-sub);font-size:.88rem;font-family:var(--mono)}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.meta-dot{width:5px;height:5px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px rgba(53,184,255,.6)}
.article-body-block{padding:clamp(2rem,5vw,3.4rem) 0 0;position:relative}
.read-layout{width:min(1000px,100% - 40px);margin:0 auto;display:grid;grid-template-columns:1fr;gap:30px}
.article-frame{position:relative}
.article-frame .article-main{padding:0 0 40px}
.not-found-panel{background:rgba(9,23,42,.8);border:1px solid rgba(147,197,255,.14);border-radius:22px;box-shadow:var(--shadow);padding:48px 24px;text-align:center}
.not-found-panel h2{font-size:1.5rem;margin-bottom:10px}
.not-found-panel p{color:var(--text-sub);margin-bottom:24px}
.article-copy{
  font-size:17px;color:rgba(236,242,252,.86);line-height:1.95;
  background:rgba(8,19,36,.72);border:1px solid rgba(147,197,255,.12);
  border-radius:24px;padding:clamp(24px,4vw,46px);
  box-shadow:var(--shadow);
}
.article-copy h2{font-size:clamp(1.4rem,2.8vw,1.8rem);font-weight:800;color:#fff;margin:1.7em 0 .8em;position:relative;padding-left:18px}
.article-copy h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;background:linear-gradient(#35B8FF,#2CE6DC)}
.article-copy h3{font-size:1.25rem;font-weight:700;margin:1.5em 0 .55em;color:#fff}
.article-copy p{margin:1em 0}
.article-copy ul,.article-copy ol{margin:1.1em 0;display:grid;gap:.55rem;padding-left:4px}
.article-copy ul li{position:relative;padding-left:22px}
.article-copy ul li::before{content:"";position:absolute;left:0;top:.38em;width:9px;height:9px;background:rgba(44,230,220,.7);border-radius:3px}
.article-copy ol{counter-reset:ai-ol}
.article-copy ol li{counter-increment:ai-ol;position:relative;padding-left:38px}
.article-copy ol li::before{content:counter(ai-ol,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--mono);color:var(--aqua);font-size:.8rem;background:rgba(44,230,220,.1);width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:7px}
.article-copy blockquote{margin:1.5em 0;padding:18px 20px;background:rgba(13,33,59,.62);border-left:3px solid var(--aqua);border-radius:0 14px 14px 0;color:rgba(236,242,252,.8)}
.article-copy blockquote p{margin:.4em 0}
.article-copy a{color:var(--primary);border-bottom:1px solid rgba(53,184,255,.3);transition:.2s}
.article-copy a:hover{color:var(--aqua);border-bottom-color:var(--aqua)}
.article-copy img{border-radius:18px;margin:1.6em 0;box-shadow:var(--shadow)}
.article-copy strong{color:#fff}
.article-copy table{width:100%;border-collapse:collapse;margin:1.6em 0}
.article-copy th,.article-copy td{border:1px solid rgba(147,197,255,.16);padding:10px 12px;text-align:left}
.article-copy th{background:rgba(14,32,60,.7);color:#fff}
.article-copy code{font-family:var(--mono);background:rgba(44,230,220,.1);color:var(--aqua);padding:2px 7px;border-radius:6px}
.article-follow{display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;background:rgba(9,23,42,.92);border:1px solid rgba(147,197,255,.13);border-radius:18px;padding:20px 24px;margin-bottom:28px;box-shadow:var(--shadow)}
.article-follow .follow-text{font-size:.9rem;color:var(--text-sub)}
.article-follow .follow-text strong{color:#fff;font-weight:600}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:38px}
.pager a{background:rgba(9,23,42,.8);border:1px solid rgba(147,197,255,.12);border-radius:16px;padding:18px 20px;transition:.2s;color:var(--text-sub);font-size:.88rem}
.pager a:hover{transform:translateY(-2px);border-color:rgba(86,205,255,.35);background:rgba(14,31,58,.86);color:#fff}
.pager .title{display:block;font-weight:700;color:var(--text);margin-top:5px;font-size:.95rem}
.related-section{padding:0 0 clamp(3rem,8vw,5rem);width:min(1200px,100% - 32px);margin:0 auto}
.related-title{display:flex;align-items:center;gap:12px;font-size:1.4rem;font-weight:800;color:#fff;margin-bottom:20px}
.related-title .mk{width:8px;height:16px;border-radius:4px;background:linear-gradient(#1E82F7,#2CE6DC);display:inline-block}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.related-card{display:block;background:rgba(14,32,60,.6);border:1px solid rgba(147,197,255,.1);border-radius:16px;padding:20px;transition:.2s;min-height:100%}
.related-card:hover{transform:translateY(-3px);background:rgba(18,40,72,.74);border-color:rgba(86,205,255,.4)}
.related-card small{display:inline-flex;margin-bottom:12px;color:var(--aqua);font-family:var(--mono);font-size:.75rem}
.related-card p{font-weight:600;font-size:.92rem;color:#fff;line-height:1.65}
.card-arrow{margin-top:16px;color:var(--primary);font-size:.88rem}
.return-link{text-align:center;margin-top:6px;font-size:.88rem;color:var(--text-sub)}
.return-link a{color:var(--text-sub);border-bottom:1px dashed rgba(167,185,214,.4);padding-bottom:2px;transition:.2s}
.return-link a:hover{color:var(--primary);border-bottom-color:var(--primary)}
.site-footer{background:rgba(3,11,22,.94);border-top:1px solid rgba(147,197,255,.12);position:relative;z-index:10}
.site-footer .container{width:min(1200px,100% - 32px);padding:64px 0 28px}
.footer-main{display:grid;grid-template-columns:minmax(220px,1.6fr) 1fr 1fr 1.1fr;gap:32px;margin-bottom:38px}
.footer-brand-line{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.footer-title{font-weight:700;font-size:1.12rem;color:#fff}
.footer-desc{color:var(--text-sub);font-size:.88rem;max-width:300px}
.footer-heading{font-size:.9rem;font-weight:700;color:#fff;letter-spacing:.08em;margin-bottom:14px;padding-bottom:12px;position:relative}
.footer-heading::after{content:"";position:absolute;left:0;bottom:0;width:30px;height:2px;border-radius:4px;background:linear-gradient(90deg,#1E82F7,#2CE6DC)}
.footer-links{display:grid;gap:8px}
.footer-link{color:var(--text-sub);font-size:.86rem;transition:.2s}
.footer-link:hover{color:var(--primary);transform:translateX(3px)}
.footer-contact{display:grid;gap:12px;color:var(--text-sub);font-size:.85rem}
.footer-contact strong{display:block;color:rgba(236,242,252,.9);font-weight:600;margin-bottom:2px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:18px;color:var(--text-weak);font-size:.8rem;padding-top:22px;border-top:1px solid rgba(147,197,255,.1);flex-wrap:wrap}
.backcrumb{color:var(--text-sub);font-size:.82rem;transition:.2s}
.backcrumb:hover{color:var(--primary)}
@media (max-width:1100px){
  .primary-nav{display:none}
  .nav-burger{display:inline-flex}
  .footer-main{grid-template-columns:1fr 1fr;gap:26px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:800px){
  body{font-size:16px}
  .container,.container-wide{width:min(100% - 28px,1200px)}
  .desktop-nav-cta{display:none}
  .page-hero{min-height:340px;padding:130px 0 42px}
  .article-title{font-size:clamp(1.55rem,6vw,2rem)}
  .article-copy{padding:24px 18px;font-size:16.5px}
  .article-follow{flex-direction:column;align-items:flex-start;gap:10px}
  .pager{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr 1fr}
  .footer-main{grid-template-columns:1fr;gap:24px}
  .footer-bottom{justify-content:flex-start;flex-direction:column}
}
@media (max-width:520px){
  .brand-text{font-size:.98rem}
  .page-hero{padding-top:120px}
  .article-meta{gap:8px 18px}
  .related-grid{grid-template-columns:1fr}
  .btn{min-height:42px}
  .article-copy ul li::before{width:7px;height:7px}
  .article-copy ol li{padding-left:34px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto}
}

/* roulang page: category1 */
:root {
    --bg: #061223;
    --bg-lift: #0A1C35;
    --glass: rgba(14, 32, 60, 0.62);
    --glass-deep: rgba(7, 18, 34, 0.82);
    --high-panel: rgba(9, 23, 42, 0.88);
    --glass-edge: rgba(147, 197, 255, 0.12);
    --accent-line: rgba(86, 205, 255, 0.5);
    --primary: #35B8FF;
    --primary-grad: linear-gradient(135deg, #1E82F7, #40C7FF);
    --cyan: #2CE6DC;
    --violet: #877BFF;
    --gold: #D8B477;
    --text: #ECF2FC;
    --text-m: #A7B9D6;
    --text-weak: #6B7D9B;
    --error: #E5636B;
    --border: rgba(148, 197, 255, 0.14);
    --radius-s: 8px;
    --radius: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --shadow: 0 8px 30px rgba(2, 8, 20, 0.35);
    --glow: 0 0 0 1px rgba(96, 205, 255, 0.2), 0 0 32px rgba(52, 184, 255, 0.28);
    --font: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --mono: "SF Mono", "JetBrains Mono", Consolas, monospace;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background:
      radial-gradient(900px 420px at 12% -6%, rgba(44, 230, 220, 0.12), transparent 55%),
      radial-gradient(1000px 520px at 88% -8%, rgba(135, 123, 255, 0.13), transparent 55%),
      radial-gradient(700px 500px at 50% 120%, rgba(216, 180, 119, 0.05), transparent 60%),
      #061223;
    color: var(--text);
    font-family: var(--font);
    line-height: 1.75;
    font-size: 17px;
    min-height: 100vh;
    overflow-x: hidden;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: var(--primary);
    text-decoration: none;
  }

  button,
  input,
  summary {
    font: inherit;
  }

  .container {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: 24px;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 80;
    background: rgba(6, 18, 35, 0.58);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
    backdrop-filter: blur(18px) saturate(130%);
    border-bottom: 1px solid transparent;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .site-header.scrolled {
    background: rgba(7, 17, 32, 0.92);
    border-bottom-color: rgba(147, 197, 255, 0.1);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 76px;
    gap: 20px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    flex-shrink: 0;
  }

  .brand-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 8px;
    border-radius: 10px;
    background: var(--primary-grad);
    color: #fff;
    font-weight: 800;
    font-size: 0.92rem;
    letter-spacing: 0.04em;
    box-shadow: 0 0 18px rgba(53, 184, 255, 0.28);
  }

  .brand-text {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
  }

  .primary-nav {
    display: flex;
    align-items: center;
    gap: 2px;
  }

  .nav-link {
    padding: 12px 14px;
    color: var(--text-m);
    font-size: 0.97rem;
    border-radius: 10px;
    position: relative;
    transition: color 0.2s ease, background 0.2s ease;
  }

  .nav-link:hover {
    color: var(--text);
    background: rgba(53, 184, 255, 0.08);
  }

  .nav-link.active {
    color: var(--primary);
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary-grad);
    box-shadow: 0 0 8px rgba(53, 184, 255, 0.55);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    text-decoration: none;
    font-weight: 600;
    line-height: 1;
    outline: none;
  }

  .btn:focus-visible,
  a:focus-visible,
  button:focus-visible,
  summary:focus-visible {
    outline: 3px solid rgba(53, 184, 255, 0.5);
    outline-offset: 3px;
  }

  .btn-primary {
    background: var(--primary-grad);
    color: #fff;
    box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.15), 0 8px 26px rgba(30, 130, 247, 0.32);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.28), 0 10px 34px rgba(53, 184, 255, 0.45);
  }

  .btn-primary:active {
    transform: translateY(0);
    filter: brightness(0.95);
  }

  .btn-lg {
    padding: 16px 30px;
    font-size: 1.05rem;
    border-radius: 14px;
  }

  .btn-pulse {
    animation: softPulse 2.8s infinite ease-in-out;
  }

  @keyframes softPulse {
    0%, 100% {
      box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.2), 0 0 22px rgba(53, 184, 255, 0.2);
    }
    50% {
      box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.4), 0 0 40px rgba(53, 184, 255, 0.42);
    }
  }

  .btn-outline {
    border-color: rgba(147, 197, 255, 0.3);
    background: rgba(14, 32, 60, 0.5);
    color: var(--text);
  }

  .btn-outline:hover {
    border-color: var(--accent-line);
    background: rgba(53, 184, 255, 0.06);
    transform: translateY(-2px);
  }

  .btn-outline:active {
    transform: translateY(0);
    background: rgba(53, 184, 255, 0.1);
  }

  .btn-sm {
    padding: 10px 18px;
    font-size: 0.92rem;
    border-radius: 10px;
  }

  .icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: 1px solid rgba(147, 197, 255, 0.16);
    background: rgba(14, 32, 60, 0.55);
    color: var(--text);
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    transition: border-color 0.2s, background 0.2s;
  }

  .icon-btn:hover {
    border-color: rgba(53, 184, 255, 0.5);
    background: rgba(53, 184, 255, 0.08);
  }

  .nav-burger {
    display: none;
  }

  .drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(2, 8, 20, 0.66);
    opacity: 0;
    pointer-events: none;
    z-index: 90;
    transition: opacity 0.25s ease;
  }

  .drawer-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 100;
    width: min(330px, 86vw);
    background: rgba(8, 19, 37, 0.9);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    backdrop-filter: blur(20px) saturate(140%);
    border-left: 1px solid rgba(147, 197, 255, 0.12);
    padding: 20px;
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.28s ease, visibility 0.28s;
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.4);
  }

  .mobile-drawer.open {
    transform: translateX(0);
    visibility: visible;
  }

  .drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 26px;
  }

  .drawer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
  }

  .drawer-close {
    background: transparent;
    border: 1px solid rgba(147, 197, 255, 0.18);
    color: var(--text-m);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
  }

  .drawer-close:hover {
    color: var(--text);
    border-color: rgba(53, 184, 255, 0.5);
  }

  .drawer-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .drawer-nav a {
    display: block;
    padding: 14px 12px;
    color: var(--text);
    border-radius: 12px;
    font-size: 1.08rem;
    transition: background 0.2s, transform 0.2s;
  }

  .drawer-nav a:hover {
    background: rgba(53, 184, 255, 0.08);
    transform: translateX(3px);
  }

  .drawer-nav a.active {
    background: rgba(53, 184, 255, 0.12);
    color: var(--primary);
  }

  .drawer-cta {
    margin-top: 18px;
  }

  .cat-hero {
    position: relative;
    min-height: 380px;
    padding: 142px 0 68px;
    display: flex;
    align-items: center;
    background:
      linear-gradient(100deg, rgba(6, 18, 35, 0.94), rgba(6, 18, 35, 0.72) 55%, rgba(5, 16, 32, 0.6)),
      url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  }

  .cat-hero::before {
    content: "";
    pointer-events: none;
    position: absolute;
    inset: 0;
    background:
      radial-gradient(380px 260px at 10% 20%, rgba(44, 230, 220, 0.1), transparent 70%),
      radial-gradient(420px 340px at 90% 5%, rgba(135, 123, 255, 0.1), transparent 70%);
  }

  .cat-hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 42px;
    align-items: center;
  }

  .crumb {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-weak);
    font-size: 0.9rem;
    margin-bottom: 18px;
  }

  .crumb a {
    color: var(--text-m);
  }

  .crumb a:hover {
    color: var(--primary);
  }

  .crumb span[aria-current="page"] {
    color: var(--text);
  }

  .cat-title {
    font-size: clamp(2.2rem, 4.2vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 16px;
    letter-spacing: -0.02em;
  }

  .hero-lead {
    color: var(--text-m);
    font-size: clamp(1.02rem, 1.4vw, 1.18rem);
    max-width: 720px;
    margin: 0 0 26px;
    line-height: 1.9;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
  }

  .status-panel {
    background: var(--glass);
    border: 1px solid var(--glass-edge);
    border-radius: var(--radius-lg);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
    backdrop-filter: blur(16px) saturate(130%);
    box-shadow: var(--shadow);
    padding: 22px 24px;
    position: relative;
    overflow: hidden;
  }

  .status-panel::after {
    content: "";
    position: absolute;
    top: 0;
    left: 18px;
    right: 18px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(53, 184, 255, 0.4), transparent);
  }

  .status-label {
    margin: 0 0 6px;
    font-size: 0.88rem;
    color: var(--text-weak);
  }

  .status-title {
    margin: 0 0 18px;
    font-size: 1.28rem;
    font-weight: 700;
    color: var(--text);
  }

  .status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid rgba(147, 197, 255, 0.12);
    padding: 12px 0;
    font-size: 0.94rem;
    color: var(--text-m);
  }

  .status-row strong {
    color: var(--text);
    font-family: var(--mono);
    font-weight: 600;
    font-size: 0.95rem;
  }

  .status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(44, 230, 220, 0.12);
    margin-right: 8px;
  }

  .layout-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 42px;
    align-items: start;
    padding-block: clamp(3.4rem, 8vw, 6.2rem);
  }

  .content-col {
    min-width: 0;
  }

  .content-col > section + section {
    margin-top: 54px;
  }

  .toc-col {
    position: sticky;
    top: 110px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 0;
  }

  .glass-card,
  .toc-card,
  .side-feature {
    background: var(--glass);
    border: 1px solid var(--glass-edge);
    border-radius: var(--radius-lg);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
    backdrop-filter: blur(16px) saturate(130%);
    box-shadow: var(--shadow);
    padding: 26px;
  }

  .section-index {
    margin: 0 0 34px;
    padding: 26px;
    border: 1px solid rgba(147, 197, 255, 0.12);
    border-radius: var(--radius-lg);
    background: rgba(9, 23, 42, 0.78);
  }

  .index-title {
    font-size: 1.22rem;
    font-weight: 700;
    margin: 0 0 16px;
    color: var(--text);
  }

  .index-number-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
  }

  .index-number-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    color: var(--text-m);
  }

  .index-number {
    color: var(--primary);
    font-family: var(--mono);
    font-size: 0.92rem;
    flex-shrink: 0;
    background: rgba(53, 184, 255, 0.08);
    border: 1px solid rgba(53, 184, 255, 0.14);
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
  }

  h2 {
    font-size: clamp(1.85rem, 3.4vw, 2.7rem);
    line-height: 1.3;
    margin: 0 0 20px;
    font-weight: 750;
    letter-spacing: -0.015em;
  }

  h3 {
    font-size: 1.34rem;
    line-height: 1.45;
    margin: 26px 0 10px;
    font-weight: 700;
  }

  .content-section p {
    color: var(--text-m);
    margin: 0 0 16px;
  }

  .content-section p strong,
  .content-section li strong {
    color: var(--text);
    font-weight: 600;
  }

  .section-lead {
    font-size: 1.08rem;
    color: var(--text-m);
    margin: 0 0 24px;
  }

  .divider-dot {
    color: var(--accent-line);
    margin-right: 8px;
  }

  .feature-list {
    list-style: none;
    margin: 24px 0;
    padding: 0;
    display: grid;
    gap: 16px;
  }

  .feature-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 18px 18px;
    border-radius: 16px;
    background: rgba(6, 18, 35, 0.46);
    border: 1px solid rgba(147, 197, 255, 0.1);
    color: var(--text-m);
  }

  .feature-list .feature-mark {
    color: var(--cyan);
    flex-shrink: 0;
    background: rgba(44, 230, 220, 0.1);
    width: 30px;
    height: 30px;
    border-radius: 30%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(44, 230, 220, 0.2);
    margin-top: 1px;
  }

  .feature-list strong {
    color: var(--text);
  }

  .flow-steps {
    margin: 26px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0;
    counter-reset: flow;
  }

  .flow-steps li {
    counter-increment: flow;
    position: relative;
    padding: 0 0 26px 58px;
    color: var(--text-m);
    border-left: 1px solid rgba(53, 184, 255, 0.16);
    margin-left: 16px;
  }

  .flow-steps li:last-child {
    padding-bottom: 4px;
  }

  .flow-steps li::before {
    content: counter(flow, decimal-leading-zero);
    position: absolute;
    left: -18px;
    top: -2px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(7, 22, 42, 0.9);
    border: 1px solid rgba(53, 184, 255, 0.38);
    color: var(--primary);
    font-family: var(--mono);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 16px rgba(53, 184, 255, 0.12);
  }

  .flow-steps li strong {
    display: block;
    color: var(--text);
    margin-bottom: 4px;
    font-size: 1.08rem;
  }

  .scenario-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-top: 20px;
  }

  .scenario-box {
    background: rgba(9, 23, 42, 0.7);
    border: 1px solid rgba(147, 197, 255, 0.1);
    border-radius: 18px;
    padding: 24px;
  }

  .scenario-box h3 {
    margin-top: 0;
    font-size: 1.18rem;
  }

  .scenario-box p {
    color: var(--text-m);
    margin: 0 0 12px;
  }

  .tag-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 6px;
    background: rgba(53, 184, 255, 0.1);
    color: var(--cyan);
    font-size: 0.84rem;
    font-weight: 600;
    border: 1px solid rgba(53, 184, 255, 0.18);
  }

  .security-callout {
    border: 1px solid rgba(216, 180, 119, 0.22);
    background: linear-gradient(135deg, rgba(9, 23, 42, 0.86), rgba(57, 40, 24, 0.4));
    border-radius: var(--radius-lg);
    padding: 26px 28px;
  }

  .security-callout strong {
    color: var(--gold);
  }

  .security-callout p {
    margin-bottom: 10px;
  }

  .faq-list {
    display: grid;
    gap: 14px;
  }

  .faq-item {
    background: var(--glass);
    border: 1px solid var(--glass-edge);
    border-radius: 18px;
    -webkit-backdrop-filter: blur(14px) saturate(130%);
    backdrop-filter: blur(14px) saturate(130%);
    overflow: hidden;
    transition: border-color 0.25s;
  }

  .faq-item[open] {
    border-color: rgba(53, 184, 255, 0.26);
    box-shadow: 0 0 0 1px rgba(53, 184, 255, 0.05), var(--shadow);
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 64px;
    padding: 14px 20px;
    cursor: pointer;
    list-style: none;
    font-size: 1.03rem;
    font-weight: 600;
    color: var(--text);
    user-select: none;
    transition: color 0.2s;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "+";
    flex-shrink: 0;
    color: var(--text-m);
    width: 26px;
    height: 26px;
    border: 1px solid rgba(147, 197, 255, 0.22);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 400;
    transition: transform 0.25s, border-color 0.25s, color 0.25s;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    color: var(--primary);
    border-color: var(--accent-line);
  }

  .faq-item summary:hover::after {
    border-color: rgba(53, 184, 255, 0.6);
    color: var(--primary);
  }

  .faq-answer {
    border-top: 1px solid rgba(53, 184, 255, 0.15);
    margin: 0 20px 20px;
    padding: 18px 0 0 16px;
    border-left: 3px solid rgba(44, 230, 220, 0.4);
    color: var(--text-m);
    font-size: 0.97rem;
  }

  .category-cta {
    position: relative;
    margin: 0 auto 72px;
    max-width: 1200px;
    border-radius: 26px;
    padding: 54px 48px;
    overflow: hidden;
    border: 1px solid rgba(147, 197, 255, 0.14);
    background:
      radial-gradient(600px 320px at 12% 30%, rgba(44, 230, 220, 0.08), transparent 60%),
      radial-gradient(620px 360px at 90% 20%, rgba(135, 123, 255, 0.1), transparent 60%),
      url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
  }

  .category-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(6, 18, 35, 0.78);
  }

  .category-cta .cta-inner {
    position: relative;
    z-index: 2;
    max-width: 780px;
  }

  .category-cta h2 {
    margin-bottom: 16px;
  }

  .category-cta p {
    color: var(--text-m);
    font-size: 1.08rem;
    margin: 0 0 28px;
    max-width: 680px;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
  }

  .site-footer {
    border-top: 1px solid rgba(147, 197, 255, 0.12);
    background: rgba(5, 15, 29, 0.86);
    padding: 60px 0 34px;
    margin-top: 30px;
  }

  .footer-main {
    display: grid;
    grid-template-columns: 1.45fr 0.9fr 0.8fr 1fr;
    gap: 38px;
    padding-bottom: 36px;
  }

  .footer-brand-line {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .footer-title {
    font-size: 1.16rem;
    font-weight: 700;
    color: var(--text);
  }

  .footer-desc {
    color: var(--text-weak);
    font-size: 0.95rem;
    max-width: 280px;
    margin: 16px 0 0;
    line-height: 1.7;
  }

  .footer-heading {
    color: var(--text);
    font-weight: 700;
    margin: 6px 0 16px;
    font-size: 1.02rem;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-link {
    color: var(--text-m);
    font-size: 0.95rem;
    transition: color 0.2s, padding-left 0.2s;
  }

  .footer-link:hover {
    color: var(--primary);
    padding-left: 3px;
  }

  .footer-contact p {
    margin: 0 0 13px;
    color: var(--text-weak);
    font-size: 0.94rem;
  }

  .footer-contact strong {
    color: var(--text-m);
    font-weight: 600;
  }

  .footer-bottom {
    border-top: 1px solid rgba(147, 197, 255, 0.1);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    color: var(--text-weak);
    font-size: 0.89rem;
  }

  .backcrumb {
    color: var(--text-weak);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .backcrumb:hover {
    color: var(--primary);
  }

  @supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .site-header,
    .status-panel,
    .glass-card,
    .toc-card,
    .side-feature,
    .faq-item,
    .mobile-drawer {
      background: rgba(7, 18, 35, 0.95);
    }
  }

  @media (max-width: 1120px) {
    .primary-nav {
      display: none;
    }

    .nav-burger {
      display: inline-flex;
    }

    .layout-grid {
      grid-template-columns: minmax(0, 1fr);
      gap: 34px;
    }

    .toc-col {
      position: static;
      display: flex;
      flex-direction: column;
      order: 2;
    }

    .content-col {
      order: 1;
    }

    .footer-main {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 820px) {
    .cat-hero {
      min-height: auto;
      padding: 130px 0 52px;
    }

    .cat-hero .container {
      grid-template-columns: 1fr;
      gap: 30px;
    }

    .status-panel {
      max-width: 560px;
    }
  }

  @media (max-width: 640px) {
    .container {
      padding-inline: 18px;
    }

    .brand-text {
      font-size: 1rem;
    }

    .desktop-nav-cta {
      display: none;
    }

    .scenario-grid {
      grid-template-columns: 1fr;
    }

    .section-index {
      padding: 20px;
    }

    .category-cta {
      padding: 36px 24px;
      margin-bottom: 40px;
      border-radius: 20px;
    }

    .cta-actions .btn {
      width: 100%;
    }

    .hero-actions .btn {
      flex: 1 1 100%;
    }

    .footer-main {
      grid-template-columns: 1fr;
      gap: 30px;
    }
  }

  @media (max-width: 480px) {
    body {
      font-size: 16px;
    }

    .header-inner {
      min-height: 70px;
    }

    .brand-badge {
      font-size: 0.8rem;
      min-width: 34px;
      height: 34px;
    }

    .brand-text {
      font-size: 0.97rem;
    }

    .cat-hero {
      padding: 118px 0 42px;
    }

    .hero-actions {
      flex-direction: column;
      align-items: stretch;
    }

    .hero-actions .btn {
      padding: 14px 18px;
      font-size: 0.98rem;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.001s !important;
      transition-duration: 0.001s !important;
    }

    html {
      scroll-behavior: auto;
    }
  }

/* roulang page: category2 */
:root {
  --bg-page: #061223;
  --bg-elev: #0A1C35;
  --glass: rgba(14, 32, 60, 0.62);
  --glass-strong: rgba(14, 32, 60, 0.86);
  --glass-edge: rgba(147, 197, 255, 0.12);
  --accent-line: rgba(86, 205, 255, 0.5);
  --accent: #35B8FF;
  --gradient-btn: 135deg, #1E82F7, #40C7FF;
  --cyan-bright: #2CE6DC;
  --violet-soft: #877BFF;
  --gold: #D8B477;
  --text-main: #ECF2FC;
  --text-sub: #A7B9D6;
  --text-muted: #6B7D9B;
  --error: #E5636B;
  --font-sans: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Consolas", monospace;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --shadow-card: 0 8px 30px rgba(2, 8, 20, 0.35);
  --shadow-glow: 0 0 0 1px rgba(96, 205, 255, 0.18), 0 0 30px rgba(52, 184, 255, 0.22);
  --space-section: clamp(4rem, 9vw, 6.8rem);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  background-color: var(--bg-page);
  color: var(--text-main);
  background-image:
    radial-gradient(1100px 500px at 12% -6%, rgba(38, 92, 170, 0.22), transparent 60%),
    radial-gradient(900px 480px at 88% 4%, rgba(135, 123, 255, 0.14), transparent 55%),
    radial-gradient(1000px 600px at 50% 105%, rgba(105, 78, 30, 0.18), transparent 60%),
    linear-gradient(180deg, #061223 0%, #07182B 100%);
  background-attachment: fixed;
  min-width: 320px;
  overflow-x: hidden;
}

body.drawer-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

p {
  margin: 0.8em 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.28;
  color: var(--text-main);
}

h1 {
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
}

h3 {
  font-size: 1.4rem;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
  border: 0;
}

button {
  cursor: pointer;
  color: var(--text-main);
  background: none;
}

:focus-visible {
  outline: 3px solid rgba(53, 184, 255, 0.35);
  outline-offset: 2px;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(6, 18, 35, 0.42);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  border-bottom: 1px solid rgba(147, 197, 255, 0.08);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@supports not ((backdrop-filter: blur(16px)) or (-webkit-backdrop-filter: blur(16px))) {
  .site-header {
    background: rgba(6, 18, 35, 0.96);
  }
}

.site-header.scrolled {
  background: rgba(8, 21, 40, 0.92);
  border-bottom-color: rgba(147, 197, 255, 0.16);
  box-shadow: 0 10px 36px rgba(2, 8, 20, 0.32);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex: none;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1E82F7, #40C7FF);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  box-shadow: 0 0 20px rgba(53, 184, 255, 0.28);
}

.brand-text {
  display: block;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.75rem, 1.6vw, 1.6rem);
}

.nav-link {
  position: relative;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  padding: 0.45rem 0;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(53, 184, 255, 0.9), rgba(44, 230, 220, 0.75));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0.65rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(var(--gradient-btn));
  color: #fff;
  box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.18), 0 8px 24px rgba(30, 130, 247, 0.24);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.3), 0 12px 32px rgba(53, 184, 255, 0.34);
}

.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn-ghost {
  background: rgba(14, 32, 60, 0.48);
  color: var(--text-main);
  border-color: rgba(147, 197, 255, 0.34);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(86, 205, 255, 0.7);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(86, 205, 255, 0.22), 0 10px 28px rgba(2, 8, 20, 0.34);
}

.btn-ghost:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 0.46rem 1rem;
  font-size: 0.88rem;
  border-radius: 8px;
}

.btn-lg {
  padding: 0.84rem 1.65rem;
  border-radius: 12px;
  font-size: 1rem;
}

.icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid rgba(147, 197, 255, 0.18);
  background: rgba(14, 32, 60, 0.6);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.icon-btn:hover {
  border-color: rgba(86, 205, 255, 0.5);
  background: rgba(14, 32, 60, 0.9);
}

.nav-burger {
  display: none;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1300;
  width: min(84vw, 360px);
  height: 100dvh;
  background: linear-gradient(160deg, rgba(10, 28, 53, 0.92), rgba(7, 19, 35, 0.97));
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  backdrop-filter: blur(18px) saturate(130%);
  border-left: 1px solid var(--glass-edge);
  box-shadow: -12px 0 40px rgba(2, 8, 20, 0.38);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transform: translateX(105%);
  visibility: hidden;
  transition: transform 0.3s ease, visibility 0.3s ease;
}

.drawer[aria-hidden="false"] {
  transform: translateX(0);
  visibility: visible;
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid rgba(147, 197, 255, 0.12);
}

.drawer .brand-text {
  font-size: 1rem;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 2rem;
}

.drawer-nav .nav-link {
  font-size: 1.125rem;
  padding: 0.8rem 0.2rem;
}

.drawer-nav .nav-link.active {
  color: var(--accent);
}

.drawer-scrim {
  position: fixed;
  inset: 0;
  z-index: 1200;
  background: rgba(2, 8, 18, 0.62);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.drawer-scrim.is-visible {
  opacity: 1;
  visibility: visible;
}

.category-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(320px, 34vh, 440px);
  padding: 132px 0 58px;
  background:
    linear-gradient(180deg, rgba(6, 18, 35, 0.42) 0%, rgba(6, 18, 35, 0.94) 100%),
    radial-gradient(680px 360px at 78% 20%, rgba(44, 230, 220, 0.12), transparent 70%),
    url("/assets/images/backpic/back-1.png") center center / cover no-repeat;
  border-bottom: 1px solid rgba(147, 197, 255, 0.1);
  overflow: hidden;
}

.category-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.category-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--cyan-bright);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(44, 230, 220, 0.1);
  border: 1px solid rgba(44, 230, 220, 0.25);
  border-radius: 999px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.2rem;
}

.category-hero h1 {
  margin-bottom: 0.4em;
}

.category-hero-lead {
  max-width: 720px;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.85;
  color: var(--text-sub);
  margin: 0.6rem 0 1.4rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  line-height: 1.5;
  padding: 0.42rem 0.95rem;
  color: var(--text-main);
  background: rgba(14, 32, 60, 0.7);
  border: 1px solid rgba(147, 197, 255, 0.18);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.category-wrap {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(280px, 4fr);
  gap: clamp(1.6rem, 3vw, 3rem);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.content-main {
  min-width: 0;
}

.section-block {
  scroll-margin-top: 110px;
  padding: clamp(1.6rem, 4vw, 2.8rem) 0;
  border-bottom: 1px solid rgba(147, 197, 255, 0.1);
}

.section-block:first-child {
  padding-top: 0;
}

.section-block:last-of-type {
  border-bottom: 0;
}

.section-kicker {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.section-block h2 {
  margin-bottom: 0.55em;
}

.page-summary {
  font-size: 1.06rem;
  color: var(--text-sub);
}

.lead {
  font-size: 1.06rem;
  color: var(--text-sub);
  line-height: 1.9;
}

.info-note {
  margin: 1.6rem 0;
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--text-main);
  background: rgba(14, 32, 60, 0.72);
  border: 1px solid rgba(86, 205, 255, 0.18);
  border-left: 4px solid var(--accent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.warning-note {
  margin: 1.6rem 0;
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  border: 1px solid rgba(229, 99, 107, 0.22);
  border-left: 4px solid var(--error);
  background: rgba(61, 25, 30, 0.38);
  color: var(--text-main);
  line-height: 1.75;
}

.secure-list {
  display: grid;
  gap: 0.8rem;
  margin: 1.25rem 0;
  list-style: none;
}

.secure-list li {
  position: relative;
  padding-left: 29px;
  color: var(--text-sub);
  line-height: 1.8;
}

.secure-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--cyan-bright));
  box-shadow: 0 0 14px rgba(53, 184, 255, 0.45);
}

.device-showcase {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 1.6rem;
  align-items: center;
  margin: 1.8rem 0 1.5rem;
}

.media-frame {
  margin: 0;
  background: rgba(14, 32, 60, 0.5);
  border: 1px solid rgba(147, 197, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-card);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 8px);
}

.media-caption {
  margin: 0.8rem 1rem 0.4rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.step-list {
  counter-reset: safetyStep;
  display: grid;
  gap: 1.1rem;
  margin: 1.6rem 0;
  list-style: none;
}

.step-list li {
  counter-increment: safetyStep;
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 1.1rem;
  align-items: stretch;
  background: rgba(9, 23, 42, 0.82);
  border: 1px solid rgba(147, 197, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.3rem;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.step-list li:hover {
  border-color: rgba(86, 205, 255, 0.32);
  box-shadow: 0 8px 24px rgba(2, 8, 20, 0.32);
}

.step-list li::before {
  content: "0" counter(safetyStep);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(216, 180, 119, 0.35);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold);
  background: rgba(216, 180, 119, 0.07);
  align-self: center;
}

.step-content p {
  margin: 0.35rem 0 0;
  color: var(--text-sub);
}

.step-content h3 {
  font-size: 1.22rem;
}

.cleanup-panel {
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem;
  background: rgba(14, 32, 60, 0.72);
  border: 1px solid rgba(147, 197, 255, 0.14);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
  margin: 1.7rem 0;
}

.toc-sidebar {
  min-width: 0;
}

.toc-card {
  position: sticky;
  top: 100px;
  background: rgba(10, 28, 53, 0.78);
  border: 1px solid rgba(147, 197, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-card);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
}

.toc-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  font-weight: 700;
  margin: 0 0 1.2rem;
}

.toc-title::before {
  content: "";
  width: 4px;
  height: 18px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent), var(--cyan-bright));
}

.toc-links {
  list-style: none;
  display: grid;
  gap: 0.3rem;
  margin-bottom: 1.7rem;
}

.toc-links a {
  display: block;
  padding: 0.52rem 0.7rem;
  border-radius: 9px;
  font-size: 0.95rem;
  color: var(--text-sub);
  border-left: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.toc-links a:hover {
  color: #fff;
  background: rgba(53, 184, 255, 0.1);
  border-left-color: var(--accent);
}

.side-mini-card {
  border-top: 1px solid rgba(147, 197, 255, 0.1);
  padding-top: 1.2rem;
  margin-top: 0.4rem;
}

.side-mini-card h3 {
  font-size: 1.06rem;
  margin: 0 0 0.55rem;
}

.side-mini-card p {
  color: var(--text-sub);
  font-size: 0.93rem;
}

.text-link {
  color: var(--cyan-bright);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.text-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.text-link:hover::after {
  transform: translateX(4px);
}

.faq-item {
  border-bottom: 1px solid rgba(147, 197, 255, 0.1);
}

.faq-item summary {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  cursor: pointer;
  list-style: none;
  padding: 0.2rem 0.2rem;
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.6;
  transition: color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover,
.faq-item[open] summary {
  color: #fff;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  flex: none;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  line-height: 1.85;
  color: var(--text-sub);
  border-left: 3px solid var(--cyan-bright);
  margin: -0.1rem 0.2rem 1.2rem;
  padding: 0.4rem 0 0.2rem 1.15rem;
}

.cta-section {
  padding: var(--space-section) 0;
}

.cta-glass {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, rgba(14, 32, 60, 0.82), rgba(8, 22, 42, 0.92)),
    radial-gradient(600px 260px at 80% 10%, rgba(44, 230, 220, 0.16), transparent 70%),
    url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
  border: 1px solid rgba(147, 197, 255, 0.2);
  padding: clamp(2rem, 6vw, 4rem);
  box-shadow: var(--shadow-glow);
}

.cta-glass::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(147, 197, 255, 0.5), transparent);
}

.cta-kicker {
  color: var(--gold);
  font-size: 0.9rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  margin-bottom: 0.7rem;
}

.cta-glass h2 {
  margin-bottom: 0.65em;
  max-width: 780px;
}

.cta-glass > p {
  max-width: 720px;
  color: var(--text-sub);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 1.6rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-bottom {
  padding: 0 0 var(--space-section);
}

.page-bottom-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.4rem;
  border-top: 1px solid rgba(147, 197, 255, 0.1);
  padding-top: 1.6rem;
}

.page-bottom-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.95rem;
}

.site-footer {
  background: rgba(5, 14, 27, 0.96);
  border-top: 1px solid rgba(147, 197, 255, 0.12);
  margin-top: auto;
}

.site-footer .container {
  padding-bottom: 1.6rem;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 2.2rem;
  padding: clamp(2.4rem, 7vw, 4rem) 0 2rem;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.footer-title {
  font-weight: 800;
  color: #fff;
  font-size: 1.05rem;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.8;
  margin: 0.2rem 0 0;
}

.footer-heading {
  font-size: 0.98rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.9rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.5;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--accent);
}

.footer-contact p {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.footer-contact strong {
  color: var(--text-main);
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  border-top: 1px solid rgba(147, 197, 255, 0.1);
  padding-top: 1.35rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.backcrumb {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.backcrumb:hover {
  color: #fff;
}

@media (max-width: 1120px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1024px) {
  .primary-nav {
    gap: 1.2rem;
  }

  .nav-link {
    font-size: 0.88rem;
  }

  .header-cta {
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 920px) {
  .primary-nav {
    display: none;
  }

  .desktop-nav-cta {
    display: none;
  }

  .nav-burger {
    display: inline-flex;
  }

  .category-wrap {
    grid-template-columns: minmax(0, 1fr);
  }

  .toc-card {
    position: static;
    margin-top: 1.5rem;
  }

  .device-showcase {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .container {
    width: min(100% - 32px, 1200px);
  }

  .brand-text {
    font-size: 0.98rem;
  }

  .header-inner {
    min-height: 66px;
  }

  .category-hero {
    padding-top: 112px;
    padding-bottom: 42px;
  }

  .category-hero h1 {
    font-size: clamp(1.7rem, 7.5vw, 2.4rem);
  }

  .hero-tags {
    gap: 0.5rem;
  }

  .hero-tag {
    font-size: 0.82rem;
    padding: 0.35rem 0.7rem;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .cta-glass {
    border-radius: 18px;
    padding: 1.8rem 1.3rem;
  }

  .step-list li {
    grid-template-columns: 44px 1fr;
    gap: 0.9rem;
    padding: 1rem 0.9rem;
  }

  .step-list li::before {
    width: 40px;
    height: 40px;
    font-size: 0.78rem;
  }

  .cleanup-panel {
    padding: 1.2rem;
  }
}

@media (max-width: 400px) {
  .brand-badge {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }

  .brand-text {
    max-width: 200px;
  }
}

/* roulang page: category3 */
:root{
  --bg-deep:#061223;
  --bg-raised:#0A1C35;
  --glass:rgba(14,32,60,.62);
  --dense:rgba(9,23,42,.88);
  --glass-edge:rgba(147,197,255,.12);
  --accent-edge:rgba(86,205,255,.5);
  --brand:#35B8FF;
  --grad-main:linear-gradient(135deg,#1E82F7,#40C7FF);
  --cyan:#2CE6DC;
  --violet:#877BFF;
  --gold:#D8B477;
  --text-main:#ECF2FC;
  --text-sub:#A7B9D6;
  --text-weak:#6B7D9B;
  --danger:#E5636B;
  --disabled:#41526E;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-xl:24px;
  --shadow:0 8px 30px rgba(2,8,20,.35);
  --glow:0 0 0 1px rgba(96,205,255,.2),0 0 30px rgba(52,184,255,.28);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-mono:"SF Mono","JetBrains Mono",Consolas,monospace;
  --spacer:clamp(4rem,10vw,7.5rem);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg-deep)}
body{
  margin:0;
  font-family:var(--font-cn);
  background:var(--bg-deep);
  color:var(--text-main);
  line-height:1.85;
  font-size:17px;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,p,ul,dl,dd{margin:0}
ul{list-style:none;padding:0}
.container{width:min(1200px,100% - 48px);margin:0 auto}
.container-wide{width:min(1280px,100% - 48px);margin:0 auto}
:focus-visible{outline:3px solid rgba(53,184,255,.35);outline-offset:2px;border-radius:6px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0;
  padding:14px 24px;
  border-radius:12px;
  font-weight:700;
  font-size:15px;
  letter-spacing:.04em;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;
  white-space:nowrap;
  cursor:pointer;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--grad-main);
  color:#fff;
  box-shadow:0 6px 20px rgba(32,156,255,.3);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(96,205,255,.25),0 10px 32px rgba(32,156,255,.45);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.9)}
.btn-ghost{
  background:rgba(9,23,42,.42);
  color:var(--text-main);
  border-color:rgba(147,197,255,.25);
  backdrop-filter:blur(12px) saturate(120%);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(86,205,255,.65);background:rgba(14,32,60,.7)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  width:100%;
  z-index:1000;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
  background:rgba(6,18,35,.12);
  backdrop-filter:blur(14px) saturate(135%);
}
.site-header.scrolled{
  background:rgba(5,14,29,.85);
  border-bottom-color:rgba(147,197,255,.14);
  box-shadow:0 8px 30px rgba(2,8,20,.24);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:76px;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-width:0;
  flex-shrink:0;
}
.brand-badge{
  width:38px;height:38px;
  border-radius:11px;
  background:linear-gradient(140deg,#1E82F7,#40C7FF);
  color:#fff;
  font-weight:800;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-mono);
  font-size:15px;
  letter-spacing:-.02em;
  box-shadow:0 0 22px rgba(64,199,255,.3);
  border:1px solid rgba(255,255,255,.12);
}
.brand-text{
  font-size:1.06rem;
  font-weight:700;
  color:#fff;
  letter-spacing:.02em;
  white-space:nowrap;
  text-shadow:0 0 16px rgba(53,184,255,.15);
}
.primary-nav{
  display:flex;
  align-items:center;
  gap:26px;
  justify-content:center;
  overflow-x:auto;
  scrollbar-width:none;
}
.primary-nav::-webkit-scrollbar{display:none}
.nav-link{
  color:rgba(236,242,252,.72);
  font-size:15px;
  font-weight:500;
  padding:10px 0;
  position:relative;
  white-space:nowrap;
  transition:color .2s ease;
}
.nav-link:hover{color:#fff}
.nav-link.active{
  color:#fff;
}
.nav-link.active::after,
.nav-link:hover::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,#1E82F7,#2CE6DC);
  opacity:.9;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.icon-btn{
  background:rgba(147,197,255,.08);
  border:1px solid rgba(147,197,255,.16);
  color:#fff;
  width:42px;
  height:42px;
  border-radius:12px;
  display:none;
  align-items:center;
  justify-content:center;
  transition:background .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:rgba(53,184,255,.16);border-color:rgba(86,205,255,.4)}
.mobile-drawer{
  position:fixed;
  top:0;right:0;
  z-index:1200;
  width:min(320px,84vw);
  height:100vh;
  background:rgba(5,14,29,.92);
  backdrop-filter:blur(18px) saturate(135%);
  border-left:1px solid rgba(147,197,255,.12);
  padding:28px 24px;
  transform:translateX(102%);
  transition:transform .28s ease;
  display:flex;
  flex-direction:column;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px}
.drawer-title{
  display:flex;align-items:center;gap:8px;
  font-weight:700;
}
.drawer-close{
  width:40px;height:40px;
  border-radius:10px;
  background:rgba(236,242,252,.06);
  border:1px solid rgba(147,197,255,.15);
  color:#fff;
  font-size:24px;
  line-height:1;
}
.drawer-nav{display:flex;flex-direction:column;gap:8px;margin-top:20px}
.drawer-nav a{
  font-size:18px;
  font-weight:600;
  padding:14px 12px;
  border-radius:12px;
  color:rgba(236,242,252,.8);
  transition:background .2s ease,color .2s ease;
}
.drawer-nav a:hover,.drawer-nav a.active{background:rgba(53,184,255,.12);color:#fff}
.drawer-cta{margin-top:auto}
.drawer-backdrop{
  position:fixed;
  inset:0;
  background:rgba(2,8,20,.65);
  backdrop-filter:blur(3px);
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease;
  z-index:1100;
}
.drawer-backdrop.show{opacity:1;pointer-events:auto}

.cat-hero{
  position:relative;
  padding:170px 0 84px;
  margin-bottom:0;
  background:
    radial-gradient(1000px 460px at 12% 20%,rgba(46,230,220,.12),transparent 62%),
    radial-gradient(900px 520px at 84% 10%,rgba(135,123,255,.16),transparent 60%),
    linear-gradient(180deg,rgba(3,12,24,.88),rgba(4,13,26,.72)),
    url(/assets/images/backpic/back-2.png) center 25% / cover no-repeat;
  border-bottom:1px solid rgba(147,197,255,.1);
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  color:var(--text-weak);
  font-size:13px;
  margin-bottom:28px;
}
.breadcrumb a{color:var(--text-sub);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.cat-hero h1{
  font-size:clamp(2.2rem,4.6vw,3.25rem);
  font-weight:800;
  line-height:1.18;
  letter-spacing:.02em;
  margin-bottom:22px;
  color:#fff;
  max-width:960px;
}
.cat-hero h1 .soft{
  background:linear-gradient(120deg,#67D4FF,#2CE6DC);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  max-width:780px;
  color:var(--text-sub);
  font-size:18px;
  line-height:1.85;
  margin-bottom:28px;
}
.hero-chips{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 15px;
  border-radius:999px;
  border:1px solid rgba(147,197,255,.16);
  background:rgba(10,28,53,.55);
  backdrop-filter:blur(14px) saturate(120%);
  color:var(--text-sub);
  font-size:13px;
}
.chip i{
  font-style:normal;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(46,230,220,.8);
  display:inline-block;
}

.document-section{
  padding:clamp(3.8rem,8vw,6rem) 0;
  background:var(--bg-deep);
  position:relative;
}
.document-section::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 400px at 8% 5%,rgba(26,102,168,.06),transparent 60%),
    radial-gradient(700px 300px at 92% 60%,rgba(135,123,255,.06),transparent 60%);
}
.doc-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:28px;
  align-items:start;
  position:relative;
  z-index:2;
}
.doc-main{
  display:flex;
  flex-direction:column;
  gap:24px;
  min-width:0;
}
.section-block{
  background:rgba(14,32,60,.62);
  border:1px solid rgba(147,197,255,.12);
  border-radius:var(--radius-lg);
  padding:clamp(26px,4vw,40px);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px) saturate(130%);
  scroll-margin-top:110px;
}
@supports not (backdrop-filter:blur(16px)){
  .section-block,.chip{background:rgba(9,23,42,.94)}
}
.section-block .anchor{scroll-margin-top:110px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--brand);
  font-weight:700;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.eyebrow .dot-block{
  width:18px;height:2px;background:var(--brand);border-radius:2px;
}
.doc-main h2{
  font-size:clamp(1.6rem,3vw,2.15rem);
  color:#fff;
  font-weight:800;
  line-height:1.35;
  margin-bottom:14px;
  letter-spacing:.01em;
}
.doc-main h2 .num{
  font-family:var(--font-mono);
  color:var(--cyan);
  margin-right:10px;
  font-size:.7em;
  font-weight:700;
}
.doc-main h3{
  color:#fff;
  font-size:1.22rem;
  margin-top:28px;
  margin-bottom:14px;
  font-weight:700;
}
.doc-main p{
  color:var(--text-sub);
  line-height:1.85;
  margin:14px 0;
}
.doc-main p strong{color:#D9E5F5;font-weight:700}
.doc-main ul{
  display:flex;
  flex-direction:column;
  gap:14px;
  margin:20px 0 8px;
}
.doc-main ul li{
  position:relative;
  padding-left:30px;
  color:var(--text-sub);
  line-height:1.8;
}
.doc-main ul li::before{
  content:"◈";
  position:absolute;
  left:4px;
  top:1px;
  color:var(--cyan);
  font-size:15px;
  filter:drop-shadow(0 0 6px rgba(46,230,220,.4));
}
.doc-main ol{
  margin:16px 0;
  padding-left:0;
  list-style:none;
  counter-reset:rules;
  display:flex;flex-direction:column;gap:16px;
}
.doc-main ol li{
  counter-increment:rules;
  position:relative;
  padding-left:42px;
  color:var(--text-sub);
}
.doc-main ol li::before{
  content:counter(rules,decimal-leading-zero);
  position:absolute;
  left:0;top:2px;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--brand);
  background:rgba(53,184,255,.1);
  border:1px solid rgba(53,184,255,.2);
  padding:2px 10px;
  border-radius:8px;
  line-height:1.4;
}
.scope-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin:22px 0 6px;
}
.scope-panel{
  border-radius:18px;
  padding:22px;
  background:rgba(9,23,42,.68);
  border:1px solid rgba(147,197,255,.12);
  position:relative;
  transition:border-color .2s ease,transform .2s ease;
}
.scope-panel:hover{border-color:rgba(86,205,255,.42);transform:translateY(-2px)}
.scope-panel.gold{
  border-top:2px solid rgba(216,180,119,.7);
}
.scope-panel.blue{
  border-top:2px solid rgba(53,184,255,.75);
}
.scope-panel h3{
  margin-top:0;
  font-size:1rem;
  color:#fff;
}
.scope-panel p{
  margin-top:10px;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.7;
}
.tag-pill{
  display:inline-block;
  padding:3px 12px;
  border-radius:999px;
  background:rgba(53,184,255,.1);
  border:1px solid rgba(53,184,255,.22);
  color:var(--brand);
  font-size:12px;
  font-weight:700;
  letter-spacing:.03em;
  margin-bottom:14px;
}
.tag-pill.gold{
  background:rgba(216,180,119,.1);
  border-color:rgba(216,180,119,.24);
  color:var(--gold);
}
.note-box{
  display:flex;
  gap:14px;
  padding:18px 20px;
  background:rgba(46,230,220,.06);
  border:1px solid rgba(46,230,220,.2);
  border-left:4px solid var(--cyan);
  border-radius:14px;
  margin:20px 0;
}
.note-box .note-flag{
  font-size:24px;line-height:1;
}
.note-box p{
  margin:0;
  color:var(--text-sub);
}
.warning-box{
  display:flex;
  gap:14px;
  padding:18px 20px;
  background:rgba(229,99,107,.07);
  border:1px solid rgba(229,99,107,.2);
  border-left:4px solid var(--danger);
  border-radius:14px;
  margin:20px 0;
}
.warning-box p{
  margin:0;
  color:rgba(236,242,252,.75);
}
.warning-box .warn-flag{font-size:22px;line-height:1.2}

.toc-sidebar{
  position:sticky;
  top:96px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.toc-card{
  background:rgba(10,28,53,.74);
  border:1px solid rgba(147,197,255,.12);
  border-radius:20px;
  padding:24px;
  overflow:hidden;
  backdrop-filter:blur(16px) saturate(130%);
  box-shadow:var(--shadow);
}
.toc-title{
  font-size:14px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--text-weak);
  margin-bottom:16px;
  text-transform:uppercase;
  position:relative;
}
.toc-title::after{
  content:attr(data-line);
  display:none;
}
.toc-list{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.toc-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:10px;
  color:var(--text-sub);
  font-size:14px;
  line-height:1.5;
  transition:background .2s ease,color .2s ease;
}
.toc-link .mark{
  width:6px;height:6px;
  border-radius:1px;
  background:rgba(147,197,255,.28);
  transition:background .2s ease,transform .2s ease;
  flex-shrink:0;
}
.toc-link:hover{
  background:rgba(53,184,255,.09);
  color:#fff;
}
.toc-link:hover .mark{
  background:var(--cyan);
  transform:scale(1.25);
}
.side-card{
  background:rgba(10,28,53,.72);
  border:1px solid rgba(147,197,255,.12);
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.side-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
}
.side-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.9);
  transition:transform .4s ease,filter .4s ease;
}
.side-card:hover .side-media img{transform:scale(1.04);filter:saturate(1.05)}
.side-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 28%,rgba(4,10,20,.85));
}
.side-media .side-label{
  position:absolute;
  left:16px;right:16px;bottom:16px;
  z-index:2;
  color:#fff;
  font-weight:700;
}
.side-card-body{padding:22px}
.side-card-body p{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.7;
  margin-bottom:18px;
}
.side-card .btn{width:100%}

.faq-block{
  scroll-margin-top:110px;
}
.faq-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:8px;
}
.faq-item{
  border:1px solid rgba(147,197,255,.12);
  border-radius:16px;
  background:rgba(9,23,42,.46);
  overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(86,205,255,.3)}
.faq-item[open]{
  background:rgba(14,32,60,.7);
  border-color:rgba(86,205,255,.3);
}
.faq-item summary{
  min-height:56px;
  padding:16px 52px 16px 20px;
  display:flex;
  align-items:center;
  cursor:pointer;
  color:#fff;
  font-weight:700;
  font-size:15px;
  list-style:none;
  position:relative;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::before{
  content:"Q";
  width:24px;height:24px;
  border-radius:7px;
  background:rgba(53,184,255,.14);
  border:1px solid rgba(53,184,255,.24);
  color:var(--brand);
  font-family:var(--font-mono);
  font-size:13px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-right:12px;
  flex-shrink:0;
}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:18px;top:50%;
  width:28px;height:28px;
  margin-top:-14px;
  border-radius:50%;
  border:1px solid rgba(147,197,255,.22);
  color:var(--text-weak);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:19px;
  transition:transform .25s ease,color .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{
  content:"−";
  transform:rotate(180deg);
  color:var(--cyan);
  border-color:rgba(46,230,220,.35);
}
.faq-answer{
  position:relative;
  border-top:1px solid rgba(53,184,255,.18);
  margin:0 20px 18px 58px;
  padding:14px 4px 4px;
}
.faq-answer::before{
  content:"";
  position:absolute;
  left:0;top:0;
  width:24px;
  height:3px;
  background:linear-gradient(90deg,#2CE6DC,#35B8FF);
  border-radius:2px;
}
.faq-answer p{
  margin:0;
  color:var(--text-sub);
  line-height:1.8;
  font-size:15px;
}

.bottom-cta{
  position:relative;
  margin-top:clamp(2.5rem,6vw,4.5rem);
  padding:clamp(28px,5vw,56px);
  border-radius:24px;
  overflow:hidden;
  background:
    radial-gradient(700px 230px at 12% 0%,rgba(46,230,220,.12),transparent 55%),
    radial-gradient(760px 280px at 88% 6%,rgba(53,184,255,.16),transparent 55%),
    rgba(9,23,42,.86);
  border:1px solid rgba(147,197,255,.18);
  box-shadow:var(--shadow);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.bottom-cta h2{
  color:#fff;
  font-size:clamp(1.55rem,2.8vw,2.2rem);
  font-weight:800;
  line-height:1.35;
  margin-bottom:10px;
}
.bottom-cta p{
  color:var(--text-sub);
  max-width:680px;
  font-size:15px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.back-to-top{
  flex-basis:100%;
  text-align:right;
  color:var(--text-weak);
  font-size:14px;
}
.back-to-top a:hover{color:var(--brand)}

.site-footer{
  background:rgba(4,11,24,.94);
  border-top:1px solid rgba(147,197,255,.1);
  padding:60px 0 0;
  color:var(--text-sub);
}
.footer-main{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:34px;
  padding-bottom:44px;
}
.footer-brand-line{
  display:flex;align-items:center;gap:10px;
  color:#fff;
  font-weight:700;
  font-size:1.1rem;
}
.footer-desc{
  margin-top:16px;
  color:var(--text-weak);
  font-size:14px;
  max-width:280px;
  line-height:1.7;
}
.footer-title{line-height:1.4}
.footer-heading{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:14px;
  letter-spacing:.02em;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
  align-items:flex-start;
}
.footer-link{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.5;
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--brand);transform:translateX(3px)}
.footer-contact p{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.6;
  margin-bottom:14px;
}
.footer-contact strong{
  color:var(--text-main);
  font-weight:700;
}
.footer-bottom{
  border-top:1px solid rgba(147,197,255,.1);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  color:var(--text-weak);
  font-size:13px;
}
.footer-bottom .backcrumb{
  color:var(--text-sub);
  transition:color .2s;
}
.footer-bottom .backcrumb:hover{color:var(--brand)}

@media (max-width:1024px){
  .primary-nav{display:none}
  .desktop-nav-cta{display:none}
  .icon-btn{display:inline-flex}
  .doc-layout{
    grid-template-columns:minmax(0,1fr);
  }
  .toc-sidebar{
    position:static;
    order:-1;
  }
  .toc-sidebar .toc-card{
    width:100%;
  }
  .toc-list{
    display:grid;
    grid-template-columns:repeat(2,1fr);
  }
  .footer-main{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:840px){
  .side-card{display:none}
}
@media (max-width:640px){
  .container{width:min(100% - 28px,1200px);margin:0 auto}
  .header-inner{min-height:68px}
  .brand-text{font-size:.98rem}
  .brand-badge{width:34px;height:34px}
  .cat-hero{padding:132px 0 56px}
  .cat-hero h1{font-size:clamp(2rem,9vw,2.6rem)}
  .hero-sub{font-size:15px}
  .scope-grid{grid-template-columns:1fr}
  .section-block{padding:24px 20px;border-radius:16px}
  .footer-main{grid-template-columns:1fr;gap:30px;padding-bottom:30px}
  .footer-desc{max-width:none}
  .bottom-cta{flex-direction:column;align-items:flex-start;gap:18px;padding:28px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .faq-answer{margin-left:16px}
  .toc-list{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;justify-content:center;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category4 */
:root {
  --page-bg: #061223;
  --bg-lift: #0A1C35;
  --glass-fill: rgba(14, 32, 60, 0.62);
  --solid-fill: rgba(9, 23, 42, 0.88);
  --glass-border: rgba(147, 197, 255, 0.12);
  --accent-border: rgba(86, 205, 255, 0.5);
  --primary: #35B8FF;
  --primary-grad: linear-gradient(135deg, #1E82F7, #40C7FF);
  --cyan: #2CE6DC;
  --violet: #877BFF;
  --gold: #D8B477;
  --text-main: #ECF2FC;
  --text-sub: #A7B9D6;
  --text-weak: #6B7D9B;
  --danger: #E5636B;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --shadow-1: 0 8px 30px rgba(2, 8, 20, 0.35);
  --shadow-glow: 0 0 0 1px rgba(96, 205, 255, 0.2), 0 0 30px rgba(52, 184, 255, 0.28);
  --font-cn: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, monospace;
  --header-h: 74px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  font-family: var(--font-cn);
  background: var(--page-bg);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(42vw 44vh at 12% 8%, rgba(44, 230, 220, 0.16), transparent 65%),
    radial-gradient(48vw 52vh at 88% 2%, rgba(135, 123, 255, 0.12), transparent 58%),
    radial-gradient(70vw 60vh at 50% 120%, rgba(216, 180, 119, 0.08), transparent 55%),
    var(--page-bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease; }
ul, ol { margin: 0; padding: 0; }
button, input { font-family: inherit; font-size: 1rem; }
h1, h2, h3, h4, p { margin: 0; }
:focus-visible { outline: 3px solid rgba(53, 184, 255, 0.5); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1200px, 92vw); margin: 0 auto; }
.page-main { padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(4rem, 8vw, 7rem); min-height: 70vh; }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(6, 18, 35, 0.72);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  border-bottom: 1px solid rgba(147, 197, 255, 0.1);
  transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled {
  background: rgba(5, 14, 28, 0.94);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.24);
  border-bottom-color: rgba(147, 197, 255, 0.16);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.brand-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  background: linear-gradient(135deg, rgba(30, 130, 247, 0.25), rgba(64, 199, 255, 0.22));
  color: #DCEFFF;
  border: 1px solid rgba(53, 184, 255, 0.38);
  border-radius: 10px;
  padding: 4px 9px;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  box-shadow: 0 0 14px rgba(53, 184, 255, 0.12), inset 0 0 10px rgba(44, 230, 220, 0.08);
}
.brand-text {
  color: var(--text-main);
  font-size: 1.1rem;
  white-space: nowrap;
}
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 1.6vw, 1.2rem);
}
.nav-link {
  position: relative;
  color: var(--text-sub);
  font-size: 0.95rem;
  padding: 0.36rem 0.22rem;
  line-height: 1.2;
  white-space: nowrap;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: linear-gradient(90deg, rgba(44, 230, 220, 0.9), rgba(53, 184, 255, 0.85));
  border-radius: 4px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}
.nav-link:hover {
  color: var(--text-main);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: #EAF7FF;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.nav-burger {
  display: none;
}
.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background .2s ease, transform .2s ease;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-1px); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  line-height: 1.2;
  text-align: center;
}
.btn-primary {
  background: linear-gradient(135deg, #1E82F7, #40C7FF);
  color: #fff;
  box-shadow: 0 4px 22px rgba(53, 184, 255, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(96, 205, 255, 0.28), 0 8px 32px rgba(53, 184, 255, 0.38);
  color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: inset 0 0 13px rgba(0, 0, 0, 0.22), 0 0 0 1px rgba(96, 205, 255, 0.3); }
.btn-ghost {
  background: rgba(14, 32, 60, 0.36);
  color: var(--text-main);
  border-color: rgba(147, 197, 255, 0.3);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover {
  border-color: rgba(86, 205, 255, 0.62);
  background: rgba(53, 184, 255, 0.1);
  transform: translateY(-2px);
  color: #fff;
}
.btn-sm { padding: 0.62rem 1rem; font-size: 0.88rem; }
.btn-md { padding: 0.8rem 1.4rem; font-size: 0.95rem; }
.btn-lg { padding: 0.95rem 1.8rem; font-size: 1rem; border-radius: 12px; }

.mobile-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(88vw, 360px);
  z-index: 220;
  background: rgba(6, 18, 35, 0.92);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border-left: 1px solid rgba(147, 197, 255, 0.16);
  padding: 2rem 1.5rem;
  transform: translateX(102%);
  visibility: hidden;
  transition: transform .3s ease, visibility .3s ease;
  display: flex;
  flex-direction: column;
}
.mobile-drawer.open {
  transform: translateX(0);
  visibility: visible;
}
.drawer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}
.drawer-menu {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.drawer-menu .nav-link {
  display: block;
  padding: 0.95rem 0.5rem;
  font-size: 1.1rem;
  border-bottom: 1px solid rgba(147, 197, 255, 0.08);
  border-radius: 0;
}
.drawer-cta {
  margin-top: 1.8rem;
}
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 210;
  background: rgba(2, 7, 14, 0.64);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
}
.drawer-overlay.open { opacity: 1; visibility: visible; }

/* 页面短 Hero */
.page-hero {
  position: relative;
  min-height: 38vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 4rem) 0 3.2rem;
  background:
    linear-gradient(160deg, rgba(6, 18, 35, 0.85), rgba(6, 18, 35, 0.55)),
    url('/assets/images/backpic/back-2.png') right bottom / cover no-repeat;
  border-bottom: 1px solid rgba(147, 197, 255, 0.1);
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(46vw 38vh at 85% 30%, rgba(53, 184, 255, 0.16), transparent 68%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--text-weak);
  margin-bottom: 1.4rem;
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.5; }
.page-hero h1 {
  font-size: clamp(2.3rem, 5.2vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.14;
  color: #F2F7FF;
  max-width: 900px;
}
.hero-lead {
  color: var(--text-sub);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 740px;
  margin-top: 1.2rem;
  line-height: 1.8;
}
.hero-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.6rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  background: rgba(14, 32, 60, 0.6);
  border: 1px solid rgba(147, 197, 255, 0.16);
  padding: 0.38rem 0.8rem;
  border-radius: 999px;
  color: var(--text-sub);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
}
.chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(44, 230, 220, 0.8);
}

/* 二栏布局 */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.content-grid-main {
  min-width: 0;
}
.toc-aside {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  display: block;
}
.toc-box {
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.4rem;
  box-shadow: var(--shadow-1);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
}
.toc-box h2 {
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
  color: var(--text-sub);
  font-weight: 700;
  letter-spacing: 0.06em;
}
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 0.12rem; }
.toc-list a {
  color: var(--text-sub);
  font-size: 0.91rem;
  padding: 0.48rem 0.6rem;
  border-left: 2px solid transparent;
  border-radius: 4px;
  display: block;
}
.toc-list a:hover { color: var(--text-main); background: rgba(53, 184, 255, 0.05); border-left-color: var(--cyan); }
.help-extra {
  margin-top: 1.4rem;
  padding: 1.3rem 1rem;
  background: rgba(9, 23, 42, 0.82);
  border: 1px solid rgba(216, 180, 119, 0.2);
  border-radius: var(--radius-md);
  text-align: center;
}
.help-extra .gold-line {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold);
  letter-spacing: 0.14em;
}
.help-extra p { color: var(--text-sub); font-size: 0.9rem; margin-top: 0.3rem; }

/* 文档章节 */
.doc-section {
  margin-bottom: clamp(2.6rem, 4vw, 3.5rem);
  scroll-margin-top: 90px;
}
.doc-section h2 {
  font-size: clamp(1.6rem, 2.6vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #E9F1FC;
  margin-bottom: 1.1rem;
}
.doc-section h3 {
  font-size: 1.22rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  color: #D7E7FB;
}
.doc-section > p {
  color: var(--text-sub);
  line-height: 1.9;
  margin-bottom: 1.1rem;
}
.section-intro {
  color: var(--text-sub);
  margin-bottom: 1.6rem;
  max-width: 850px;
}

/* callout / notice */
.callout {
  position: relative;
  background: linear-gradient(135deg, rgba(30, 130, 247, 0.12), rgba(44, 230, 220, 0.05));
  border: 1px solid rgba(86, 205, 255, 0.22);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem 1.1rem 2.4rem;
  color: var(--text-sub);
  font-size: 0.95rem;
  margin: 1.4rem 0;
}
.callout::before {
  content: "!";
  position: absolute;
  left: 1rem;
  top: 1.1rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(53, 184, 255, 0.2);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}

/* 可处理路径列表 */
.path-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.5rem 0;
}
.path-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.path-item:hover {
  border-color: rgba(86, 205, 255, 0.42);
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}
.path-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--cyan);
  background: rgba(44, 230, 220, 0.08);
  border: 1px solid rgba(44, 230, 220, 0.2);
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
}
.path-content strong {
  display: block;
  color: #DFEAF9;
  font-size: 1rem;
  margin-bottom: 0.22rem;
}
.path-content span {
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* info blocks 联系渠道双列 */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}
.channel-card {
  background: rgba(9, 23, 42, 0.72);
  border: 1px solid rgba(147, 197, 255, 0.13);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.3rem;
}
.channel-card .channel-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  color: #E3EDFB;
  margin-bottom: 0.6rem;
  font-size: 1.02rem;
}
.channel-card p {
  color: var(--text-sub);
  font-size: 0.9rem;
  line-height: 1.7;
}
.channel-card .small-tip {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: var(--text-weak);
  border-left: 2px solid var(--primary);
  padding-left: 0.5rem;
}

/* 表格 */
.simple-table-wrap {
  overflow-x: auto;
  margin: 1.6rem 0;
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.simple-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.simple-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-sub);
  background: rgba(9, 23, 42, 0.44);
  padding: 0.9rem 1.2rem;
}
.simple-table td {
  padding: 0.9rem 1.2rem;
  border-top: 1px solid rgba(147, 197, 255, 0.08);
  color: var(--text-main);
  vertical-align: middle;
}
.simple-table td.sub { color: var(--text-sub); }
.table-tag {
  display: inline-block;
  padding: 0.18rem 0.65rem;
  border-radius: 6px;
  font-size: 0.84rem;
  border: 1px solid rgba(53, 184, 255, 0.3);
  color: var(--cyan);
  background: rgba(53, 184, 255, 0.07);
}
.table-tag.gold {
  border-color: rgba(216, 180, 119, 0.38);
  color: var(--gold);
  background: rgba(216, 180, 119, 0.07);
}

/* FAQ 手风琴 */
.faq-panel {
  margin-top: 1rem;
}
.faq-item {
  border: 1px solid rgba(147, 197, 255, 0.12);
  border-radius: var(--radius-md);
  background: var(--glass-fill);
  margin-bottom: 0.9rem;
  overflow: hidden;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item:hover {
  border-color: rgba(147, 197, 255, 0.22);
}
.faq-summary {
  list-style: none;
  cursor: pointer;
  padding: 1.05rem 1.2rem 1.05rem 3.1rem;
  position: relative;
  font-weight: 600;
  color: var(--text-main);
  min-height: 58px;
  display: flex;
  align-items: center;
  font-size: 1.02rem;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary::before {
  content: "问";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(53, 184, 255, 0.18), rgba(44, 230, 220, 0.12));
  border: 1px solid rgba(53, 184, 255, 0.2);
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  color: var(--text-weak);
  font-size: 1.5rem;
  line-height: 1;
  font-family: var(--font-mono);
  transition: transform .2s ease;
}
.faq-item[open] .faq-summary::after {
  content: "−";
  transform: translateY(-50%) rotate(0deg);
  color: var(--cyan);
}
.faq-answer {
  margin: 0 1.2rem 1.3rem 3.1rem;
  padding: 0.8rem 1rem 0.2rem;
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-md) 0 0;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.85;
  background: rgba(53, 184, 255, 0.03);
}
.faq-answer p { margin-bottom: 0.6rem; }
.faq-answer p:last-child { margin-bottom: 0; }

/* 图片段落 */
.helping-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  margin: 1.6rem 0;
  box-shadow: var(--shadow-1);
  position: relative;
  max-height: 420px;
}
.helping-visual img {
  width: 100%;
  height: 100%;
  max-height: 420px;
  object-fit: cover;
}
.helping-visual .img-caption {
  padding: 0.9rem 1.1rem;
  background: rgba(6, 18, 35, 0.7);
  color: var(--text-sub);
  font-size: 0.9rem;
  border-top: 1px solid rgba(147, 197, 255, 0.1);
}

/* 底部CTA内页 */
.page-cta-card {
  margin-top: 3rem;
  background: var(--glass-fill);
  border: 1px solid rgba(86, 205, 255, 0.25);
  border-radius: var(--radius-xl);
  padding: clamp(1.8rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-1);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  backdrop-filter: blur(18px) saturate(130%);
}
.page-cta-card h2 {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  color: #EDF4FF;
  margin-bottom: 0.7rem;
  font-weight: 700;
}
.page-cta-card p {
  color: var(--text-sub);
  max-width: 630px;
  font-size: 0.96rem;
}
.cta-actions {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  flex-wrap: wrap;
}
.middle-cta {
  text-align: center;
  border-top: 1px solid rgba(147, 197, 255, 0.14);
  padding-top: 2.3rem;
  margin-top: 2.6rem;
}
.middle-cta .text-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-sub);
  font-size: 0.95rem;
}
.middle-cta .text-btn:hover {
  color: var(--primary);
  gap: 0.7rem;
}

/* footer */
.site-footer {
  background: rgba(4, 12, 24, 0.95);
  border-top: 1px solid rgba(147, 197, 255, 0.12);
  padding: 4rem 0 0;
  margin-top: 2rem;
}
.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(130px, 0.9fr));
  gap: 2.4rem;
  padding-bottom: 3rem;
}
.footer-title { color: var(--text-main); font-weight: 700; }
.footer-desc {
  color: var(--text-weak);
  font-size: 0.9rem;
  line-height: 1.75;
  margin-top: 0.8rem;
  max-width: 280px;
}
.footer-heading {
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 1rem;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  align-items: flex-start;
}
.footer-link {
  color: var(--text-sub);
  font-size: 0.9rem;
}
.footer-link:hover { color: var(--primary); }
.footer-contact p {
  color: var(--text-sub);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}
.footer-contact strong { color: #D7E2F2; font-weight: 600; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid rgba(147, 197, 255, 0.1);
  padding: 1.3rem 0;
  font-size: 0.87rem;
  color: var(--text-weak);
}
.footer-bottom .backcrumb {
  color: var(--text-sub);
}
.footer-bottom .backcrumb:hover {
  color: var(--primary);
}
.brand-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* responsive */
@media (max-width: 1100px) {
  .primary-nav { gap: 0.6rem; }
  .nav-link { font-size: 0.88rem; }
}
@media (max-width: 900px) {
  .primary-nav {
    display: none;
  }
  .nav-burger { display: inline-flex; }
  .desktop-nav-cta { display: none; }
  .content-grid { grid-template-columns: 1fr; }
  .toc-aside {
    position: relative;
    top: 0;
    order: -1;
    margin-bottom: 1rem;
  }
  .toc-box {
    padding: 1.1rem 1.2rem;
  }
  .toc-list { flex-direction: row; flex-wrap: wrap; gap: 0.2rem 0.8rem; }
  .toc-list a { border-left: none; border-radius: 6px; padding: 0.35rem 0.5rem; font-size: 0.88rem; }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 1.6rem;
  }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .header-inner { gap: 0.3rem; }
  .brand-text { font-size: 0.95rem; }
  .brand-badge { font-size: 0.75rem; }
  .page-hero { min-height: 46vh; padding-top: calc(var(--header-h) + 3rem); }
  .breadcrumb { margin-bottom: 1rem; }
  .channel-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 1.8rem; }
  .page-cta-card { flex-direction: column; align-items: flex-start; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1 1 100%; }
  .brand-badge {
    border-radius: 8px;
  }
  .path-item { flex-direction: column; gap: 0.6rem; }
  .faq-summary {
    padding-left: 3.2rem;
    font-size: 0.96rem;
    padding-right: 2.5rem;
  }
  .faq-summary::before { left: 0.85rem; width: 28px; height: 28px; }
  .faq-answer { margin-left: 1rem; margin-right: 0.8rem; padding-left: 0.8rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}