/* roulang page: index */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1526;
  --bg-2:#102038;
  --brand:#0E2A57;
  --accent:#22D3EE;
  --warm:#F5A524;
  --fg:#E6EDF7;
  --fg-2:#C7D2E1;
  --fg-3:#8A9AB0;
  --ok:#34D399;
  --warn:#FBBF24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --shadow-1:0 8px 24px -16px rgba(0,0,0,.7);
  --shadow-2:0 24px 48px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(34,211,238,.35), 0 12px 32px -12px rgba(34,211,238,.45);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
.site-body{
  margin:0;
  background:var(--bg-0);
  color:var(--fg);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
.site-body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,select,textarea{font:inherit}
::selection{background:rgba(34,211,238,.2);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;box-shadow:0 0 0 4px rgba(34,211,238,.18);border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#050A12}
::-webkit-scrollbar-thumb{background:#1B2C42;border-radius:999px;border:2px solid #050A12}
::-webkit-scrollbar-thumb:hover{background:#25405F}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}

.mono{font-family:Inter,ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums;letter-spacing:.01em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,11,20,.86);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,11,20,.72);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
@media(min-width:1024px){.header-inner{height:72px;gap:24px}}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(140deg,#22D3EE 0%,#0E7490 60%,#0B3A54 100%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 1px rgba(34,211,238,.4),0 10px 22px -12px rgba(34,211,238,.7);
}
.logo-mark span{font-family:Inter,ui-monospace,monospace;font-size:15px;font-weight:700;color:#04141B}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:.9375rem;font-weight:700;letter-spacing:0}
.logo-text i{font-style:normal;font-size:.6875rem;color:var(--fg-3);letter-spacing:.06em}
.logo-text i::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--ok);margin-right:5px;vertical-align:middle;transform:translateY(-1px)}

.nav-chips{display:none;align-items:center;gap:6px;margin:0 auto;padding:5px;border-radius:999px;background:rgba(16,32,56,.6);border:1px solid var(--line)}
@media(min-width:1024px){.nav-chips{display:flex}}
.chip{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:.8125rem;line-height:1.6;
  color:var(--fg-3);border:1px solid transparent;
  transition:color var(--ease),background var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.chip:hover{color:var(--fg);background:rgba(255,255,255,.05)}
.chip.is-active{
  color:#8BEAF8;
  background:rgba(34,211,238,.12);
  border-color:rgba(34,211,238,.35);
}
.chip.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:var(--warm);opacity:.9;
}
.header-cta{margin-left:auto;display:none;align-items:center}
@media(min-width:1024px){.header-cta{display:flex;margin-left:0}}

.burger{
  margin-left:auto;display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line-2);
  align-items:center;background:rgba(16,32,56,.6);transition:border-color var(--ease)}
.burger:hover{border-color:rgba(34,211,238,.5)}
.burger i{display:block;width:17px;height:1.6px;background:var(--fg-2);border-radius:2px;transition:all var(--ease)}
@media(min-width:1024px){.burger{display:none}}

.drawer{
  position:fixed;inset:64px 0 0 0;z-index:55;
  background:rgba(6,11,20,.98);backdrop-filter:blur(18px);
  padding:22px 20px 40px;display:none;flex-direction:column;gap:10px;
  overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 18px;border-radius:14px;border:1px solid var(--line);
  background:rgba(16,32,56,.5);font-size:1rem;color:var(--fg-2);
  transition:all var(--ease);
}
.drawer a.drawer-link:hover,.drawer a.drawer-link.is-active{border-color:rgba(34,211,238,.4);color:#8BEAF8;background:rgba(34,211,238,.08)}
.drawer .drawer-foot{margin-top:auto;padding-top:22px}

/* ---------- buttons ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  background:linear-gradient(135deg,#22D3EE 0%,#0E7490 100%);
  color:#03151B;font-weight:650;font-size:.9375rem;
  border:1px solid rgba(34,211,238,.45);
  box-shadow:var(--glow);
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(34,211,238,.5),0 18px 40px -14px rgba(34,211,238,.65)}
.btn-primary:active{transform:translateY(-1px);filter:brightness(.98)}
.btn-primary.btn-sm{padding:9px 16px;font-size:.875rem}
.btn-primary.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  background:transparent;color:var(--fg-2);font-weight:550;font-size:.9375rem;
  border:1px solid rgba(255,255,255,.18);
  transition:all var(--ease);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(-1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:.875rem;color:var(--accent);
  transition:gap var(--ease),color var(--ease);
}
.link-arrow::after{content:"→";font-family:Inter,ui-monospace,monospace;transition:transform var(--ease)}
.link-arrow:hover{gap:10px}
.link-arrow:hover::after{transform:translateX(2px)}
.link-quiet{color:var(--fg-3);font-size:.875rem;transition:color var(--ease)}
.link-quiet:hover{color:var(--accent)}

/* ---------- surfaces ---------- */
.card{
  position:relative;
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(16,32,56,.72) 0%,rgba(11,21,38,.86) 100%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.3)}
.glass{
  background:rgba(11,21,38,.66);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
}
.img-frame{position:relative;overflow:hidden;border-radius:var(--r-img);background:linear-gradient(135deg,#0E2A57,#060B14)}
.img-frame img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.card:hover .img-frame img{transform:scale(1.04)}
.img-mask{position:absolute;inset:0;background:rgba(4,9,16,.34)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:.75rem;line-height:1.6;
  color:var(--fg-2);background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.tag-warm{color:var(--warm);background:rgba(245,165,36,.1);border-color:rgba(245,165,36,.28)}
.tag-acc{color:#8BEAF8;background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.3)}
.tag-ok{color:var(--ok);background:rgba(52,211,153,.1);border-color:rgba(52,211,153,.28)}
.sec{padding-top:56px;padding-bottom:56px}
@media(min-width:768px){.sec{padding-top:80px;padding-bottom:80px}}
@media(min-width:1024px){.sec{padding-top:96px;padding-bottom:96px}}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:32px}
.h2{font-size:1.5rem;font-weight:650;line-height:1.3;margin:0;letter-spacing:-.01em}
@media(min-width:768px){.h2{font-size:1.875rem}}
.h3{font-size:1.0625rem;font-weight:600;line-height:1.5;margin:0}
@media(min-width:1024px){.h3{font-size:1.1875rem}}
.lede{color:var(--fg-3);font-size:.9375rem;line-height:1.8;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:Inter,ui-monospace,monospace;font-size:.75rem;letter-spacing:.08em;
  color:var(--warm);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--warm);opacity:.7}
.divider{height:1px;background:var(--line);border:0}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding-top:48px;padding-bottom:56px;border-bottom:1px solid var(--line)}
@media(min-width:1024px){.hero{padding-top:76px;padding-bottom:88px}}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 26% 0%,#000 26%,transparent 74%);
  mask-image:radial-gradient(ellipse 78% 62% at 26% 0%,#000 26%,transparent 74%);
}
.hero-rings{
  position:absolute;right:-160px;top:-160px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.10) 0%,transparent 62%);
  box-shadow:
    0 0 0 1px rgba(34,211,238,.10),
    0 0 0 92px rgba(34,211,238,.035),
    0 0 0 186px rgba(34,211,238,.018);
  pointer-events:none;
}
.hero-h1{
  font-size:clamp(2rem,5vw,3.75rem);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:700;
  margin:16px 0 0;
}
.hero-sub{color:var(--fg-2);font-size:1rem;line-height:1.8;margin:18px 0 0;max-width:34em}
@media(min-width:768px){.hero-sub{font-size:1.0625rem}}
.proof{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
.proof-item{display:flex;align-items:center;gap:9px;font-size:.8125rem;color:var(--fg-3)}
.proof-item b{font-family:Inter,ui-monospace,monospace;color:var(--warm);font-weight:600;font-size:.875rem}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2)}
.hero-visual .ratio{aspect-ratio:4/3;width:100%}
@media(min-width:1024px){.hero-visual .ratio{aspect-ratio:21/9}}
.hero-badge{
  position:absolute;left:16px;bottom:16px;display:flex;align-items:center;gap:10px;
  padding:10px 14px;border-radius:14px;
  background:rgba(6,11,20,.72);border:1px solid rgba(34,211,238,.28);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.hero-badge b{font-family:Inter,ui-monospace,monospace;font-size:1.125rem;color:var(--accent)}
.hero-badge span{font-size:.75rem;color:var(--fg-3)}

/* ---------- steps ---------- */
.steps{position:relative;display:grid;gap:20px}
@media(min-width:1024px){.steps{grid-template-columns:repeat(3,1fr);gap:32px}}
.steps-line{
  display:none;
}
@media(min-width:1024px){
  .steps-line{
    display:block;position:absolute;left:6%;right:6%;top:64px;height:1px;
    background:linear-gradient(90deg,transparent,rgba(34,211,238,.45),rgba(34,211,238,.45),transparent);
    box-shadow:0 0 12px rgba(34,211,238,.5);
  }
}
.step-card{padding:24px;position:relative;z-index:1}
@media(min-width:1024px){.step-card{padding:28px}.step-card.lift{transform:translateY(-16px)}.step-card.lift:hover{transform:translateY(-18px)}}
.step-num{
  font-family:Inter,ui-monospace,monospace;font-size:2rem;font-weight:700;
  color:var(--warm);opacity:.9;line-height:1;letter-spacing:-.02em;
}

/* ---------- list rows ---------- */
.rowitem{
  display:flex;gap:16px;padding:18px 20px;border-radius:var(--r-card);
  background:rgba(16,32,56,.42);border:1px solid var(--line);
  transition:all var(--ease);
}
.rowitem:hover{background:rgba(16,32,56,.72);border-color:rgba(34,211,238,.3);transform:translateY(-2px)}
.rowidx{
  font-family:Inter,ui-monospace,monospace;font-size:.8125rem;color:var(--warm);
  padding-top:3px;flex-shrink:0;width:26px;
}

/* ---------- cms cards ---------- */
.cms-grid{display:grid;gap:24px}
@media(min-width:768px){.cms-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.cms-grid{grid-template-columns:repeat(3,1fr)}}
.cms-card{display:flex;flex-direction:column;overflow:hidden;padding:16px}
.cms-cover{aspect-ratio:16/9;width:100%}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  border:1px dashed rgba(255,255,255,.16);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;color:var(--fg-3);
  background:rgba(16,32,56,.28);
}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;
  background:rgba(16,32,56,.42);
  transition:border-color var(--ease),background var(--ease);
}
.faq-item:hover{border-color:rgba(255,255,255,.16)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
  gap:16px;padding:18px 22px;font-weight:600;font-size:.9375rem;color:var(--fg-2);
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex-shrink:0;font-family:Inter,ui-monospace,monospace;
  font-size:1.125rem;line-height:1.2;color:var(--accent);
  transition:transform var(--ease);
}
.faq-item[open]{border-color:rgba(34,211,238,.36);background:rgba(16,32,56,.7)}
.faq-item[open] summary{color:#fff;box-shadow:inset 2px 0 0 var(--accent),0 0 20px -10px rgba(34,211,238,.9)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;color:var(--fg-3);font-size:.9375rem;line-height:1.9;border-top:1px solid var(--line);padding-top:16px;margin-top:2px}

/* ---------- cta form ---------- */
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.8125rem;color:var(--fg-3)}
.input{
  width:100%;padding:11px 14px;border-radius:var(--r-btn);
  background:rgba(6,11,20,.72);border:1px solid rgba(255,255,255,.14);
  color:var(--fg);font-size:.9375rem;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.input::placeholder{color:#5D6E85}
.input:hover{border-color:rgba(255,255,255,.24)}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,211,238,.16);background:rgba(6,11,20,.9)}
select.input{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#8A9AB0 50%),linear-gradient(135deg,#8A9AB0 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.form-note{font-size:.75rem;color:var(--fg-3);line-height:1.7}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:linear-gradient(180deg,#070D18 0%,#04080F 100%);padding-top:56px}
.foot-grid{display:grid;gap:32px}
@media(min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.foot-title{font-size:.8125rem;letter-spacing:.06em;color:var(--fg-3);margin:0 0 14px;font-weight:600}
.foot-link{display:inline-block;color:var(--fg-3);font-size:.875rem;line-height:2.1;transition:color var(--ease),box-shadow var(--ease)}
.foot-link:hover{color:var(--accent);box-shadow:0 2px 0 0 rgba(34,211,238,.6)}
.foot-bottom{
  margin-top:44px;padding-top:20px;padding-bottom:28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  color:#63748C;font-size:.8125rem;
}
.seal{
  display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:10px;
  border:1px solid rgba(34,211,238,.28);background:rgba(34,211,238,.06);
  color:#8BEAF8;font-size:.75rem;
}
.eyebrow-2{font-family:Inter,ui-monospace,monospace;font-size:.75rem;color:var(--fg-3);letter-spacing:.06em}

/* roulang page: article */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1526;
  --bg-2:#102038;
  --brand:#0E2A57;
  --accent:#22D3EE;
  --warm:#F5A524;
  --fg:#E6EDF7;
  --fg-2:#C7D2E1;
  --fg-3:#8A9AB0;
  --ok:#34D399;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --shadow-1:0 8px 24px -16px rgba(0,0,0,.7);
  --shadow-2:0 24px 48px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(34,211,238,.35), 0 12px 32px -12px rgba(34,211,238,.45);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Inter",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--fg);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 70%);
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 70%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:650;color:var(--fg)}
ul,ol{margin:0;padding:0;list-style:none}

:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
  box-shadow:0 0 0 4px rgba(34,211,238,.22);
}
::selection{background:rgba(34,211,238,.26);color:#FFFFFF}

::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:#070D18}
::-webkit-scrollbar-thumb{background:#1B2C45;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#27405F}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
@media (min-width:1024px){
  .wrap{padding:0 32px}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,11,20,.9);
  border-bottom:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,11,20,.76);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 34px -26px rgba(0,0,0,.95);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  height:64px;
}
@media (min-width:1024px){
  .header-inner{height:72px}
}

.logo{display:inline-flex;align-items:center;gap:12px;min-width:0}
.logo-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,#123A6B,#0B1526);
  border:1px solid rgba(34,211,238,.34);
  box-shadow:0 10px 26px -18px rgba(34,211,238,.75);
}
.logo-mark span{
  font-family:var(--font-mono);
  font-size:.8125rem;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--accent);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.logo-text b{font-size:.95rem;font-weight:700;color:var(--fg);white-space:nowrap}
.logo-text i{
  font-style:normal;
  font-size:.6875rem;
  color:var(--fg-3);
  letter-spacing:.02em;
  white-space:nowrap;
}

.nav-chips{display:none}
@media (min-width:1024px){
  .nav-chips{
    display:inline-flex;
    align-items:center;
    gap:4px;
    padding:5px;
    border-radius:999px;
    background:rgba(255,255,255,.03);
    border:1px solid var(--line);
  }
}
.chip{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 16px;
  border-radius:999px;
  font-size:.875rem;
  font-weight:500;
  color:var(--fg-2);
  border:1px solid transparent;
  transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out;
}
.chip:hover{color:var(--fg);background:rgba(255,255,255,.06)}
.chip.is-active{
  color:var(--accent);
  background:rgba(34,211,238,.12);
  border-color:rgba(34,211,238,.32);
}
.chip.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:3px;
  transform:translateX(-50%);
  width:18px;height:2px;
  border-radius:2px;
  background:var(--warm);
}

.header-actions{display:flex;align-items:center;gap:10px}
.header-cta{display:none}
@media (min-width:1024px){
  .header-cta{display:inline-flex}
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line-2);
  color:var(--fg-2);
  transition:color .2s ease-out,border-color .2s ease-out,background .2s ease-out;
}
.nav-toggle:hover{color:var(--accent);border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.08)}
@media (min-width:1024px){
  .nav-toggle{display:none}
}

.mobile-drawer{display:none}
.mobile-drawer.is-open{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:14px 20px 24px;
  background:rgba(6,11,20,.985);
  border-bottom:1px solid var(--line);
  box-shadow:0 26px 44px -32px rgba(0,0,0,.95);
}
.mobile-drawer .chip{
  justify-content:flex-start;
  padding:14px 16px;
  border-radius:14px;
  border-color:var(--line);
  background:rgba(255,255,255,.02);
  font-size:.9375rem;
}
.mobile-drawer .chip.is-active{background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.32)}
.mobile-drawer .chip.is-active::after{display:none}
.drawer-cta{width:100%;margin-top:8px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--r-btn);
  font-size:.9375rem;
  font-weight:600;
  white-space:nowrap;
  transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-primary{
  background:linear-gradient(135deg,#22D3EE,#0E7490);
  color:#04121A;
  font-weight:700;
  box-shadow:var(--glow);
}
.btn-primary:hover{
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(34,211,238,.55),0 18px 40px -14px rgba(34,211,238,.7);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  color:var(--fg-2);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:.875rem;
  font-weight:600;
  color:var(--accent);
  transition:gap .2s ease-out,color .2s ease-out;
}
.link-arrow:hover{gap:10px;color:#7DE9FA}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:22px 0 0;
  font-size:13px;
  line-height:1.5;
  color:var(--fg-3);
}
.breadcrumb a{transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .cur{
  color:var(--fg-2);
  max-width:44ch;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* ============ 文章头部 ============ */
.article-head{padding:20px 0 8px}
.head-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip-cat{
  color:var(--accent);
  background:rgba(34,211,238,.12);
  border-color:rgba(34,211,238,.3);
  padding:6px 14px;
  font-size:.8125rem;
}
.article-title{
  margin:18px 0 0;
  max-width:26ch;
  font-size:clamp(1.75rem,3.7vw,2.6rem);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:700;
}
.meta-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:18px;
  font-size:.8125rem;
  color:var(--fg-3);
}
.meta-bar .dot{width:1px;height:12px;background:rgba(255,255,255,.16)}

.head-rule{
  margin-top:28px;
  height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,.5),rgba(255,255,255,.06) 40%,transparent);
}

/* ============ 正文布局 ============ */
.article-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:36px;
  padding:34px 0 0;
}
@media (min-width:1024px){
  .article-grid{
    grid-template-columns:minmax(0,720px) 300px;
    justify-content:center;
    gap:56px;
    padding:44px 0 0;
  }
}

.article-body-wrap{
  font-size:1rem;
  line-height:1.9;
  color:var(--fg-2);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body-wrap > *:first-child{margin-top:0}
.article-body-wrap p{margin:1.1em 0}
.article-body-wrap h2{
  position:relative;
  margin:2.2em 0 .8em;
  padding-left:16px;
  font-size:1.5rem;
  line-height:1.45;
  font-weight:650;
  color:var(--fg);
}
.article-body-wrap h2::before{
  content:"";
  position:absolute;
  left:0;top:.2em;bottom:.2em;
  width:4px;
  border-radius:4px;
  background:var(--accent);
  box-shadow:0 0 12px rgba(34,211,238,.65);
}
.article-body-wrap h3{
  margin:1.8em 0 .6em;
  font-size:1.15rem;
  line-height:1.6;
  font-weight:600;
  color:var(--fg);
}
.article-body-wrap h4{
  margin:1.5em 0 .5em;
  font-size:1rem;
  font-weight:600;
  color:var(--fg);
}
.article-body-wrap a{
  color:var(--accent);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  transition:color .2s ease-out;
}
.article-body-wrap a:hover{color:#7DE9FA}
.article-body-wrap strong{color:var(--fg);font-weight:650}
.article-body-wrap ul li,
.article-body-wrap ol li{margin:.55em 0}
.article-body-wrap ul li{position:relative;padding-left:22px}
.article-body-wrap ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.78em;
  width:8px;height:8px;
  border-radius:999px;
  background:var(--accent);
  box-shadow:0 0 10px rgba(34,211,238,.8);
}
.article-body-wrap ol{counter-reset:li-counter}
.article-body-wrap ol li{
  position:relative;
  padding-left:30px;
  counter-increment:li-counter;
}
.article-body-wrap ol li::before{
  content:counter(li-counter,decimal-leading-zero);
  position:absolute;
  left:0;top:.15em;
  font-family:var(--font-mono);
  font-size:.8125rem;
  font-weight:600;
  color:var(--warm);
}
.article-body-wrap blockquote{
  margin:1.7em 0;
  padding:18px 22px;
  border-left:3px solid var(--warm);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  border-radius:0 var(--r-img) var(--r-img) 0;
  background:rgba(255,255,255,.045);
  color:var(--fg-2);
}
.article-body-wrap blockquote p:last-child{margin-bottom:0}
.article-body-wrap img{
  margin:1.7em auto;
  border-radius:var(--r-img);
  border:1px solid var(--line);
}
.article-body-wrap figure{margin:1.7em 0}
.article-body-wrap figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--fg-3);
}
.article-body-wrap table{
  width:100%;
  margin:1.7em 0;
  border-collapse:separate;
  border-spacing:0;
  font-size:.9375rem;
  border:1px solid var(--line);
  border-radius:var(--r-img);
  overflow:hidden;
}
.article-body-wrap thead th{
  background:var(--bg-2);
  color:var(--fg);
  font-weight:600;
  text-align:left;
  padding:12px 14px;
}
.article-body-wrap tbody td{
  padding:12px 14px;
  border-top:1px solid var(--line);
  color:var(--fg-2);
}
.article-body-wrap tbody tr:nth-child(even) td{background:rgba(255,255,255,.025)}
@media (max-width:640px){
  .article-body-wrap table{display:block;overflow-x:auto;white-space:nowrap}
}
.article-body-wrap hr{
  margin:2.2em 0;
  border:0;
  height:1px;
  background:var(--line);
}

/* ============ 侧栏 ============ */
.article-side{min-width:0}
.side-sticky{
  display:flex;
  flex-direction:column;
  gap:20px;
}
@media (min-width:1024px){
  .side-sticky{position:sticky;top:96px}
}
.side-card{
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-1);
  box-shadow:var(--shadow-1);
}
.side-title{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:.9375rem;
  font-weight:600;
  color:var(--fg);
}
.side-title::before{
  content:"";
  width:6px;height:6px;
  border-radius:999px;
  background:var(--warm);
  box-shadow:0 0 10px rgba(245,165,36,.8);
}
.toc-list{display:flex;flex-direction:column;gap:2px;margin-top:14px}
.toc-list a{
  display:block;
  padding:7px 10px;
  font-size:.8125rem;
  line-height:1.55;
  color:var(--fg-3);
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
  transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out;
}
.toc-list a:hover{color:var(--fg);background:rgba(255,255,255,.045)}
.toc-list a.is-active{
  color:var(--accent);
  background:rgba(34,211,238,.1);
  border-left-color:var(--accent);
}
.side-posts{display:flex;flex-direction:column;gap:14px;margin-top:14px}
.side-post{display:flex;gap:12px;align-items:flex-start;min-width:0}
.side-post img{
  width:64px;height:48px;flex:0 0 64px;
  object-fit:cover;
  border-radius:10px;
  border:1px solid var(--line);
  background:linear-gradient(145deg,#0E2A57,#060B14);
}
.side-post b{
  font-size:.875rem;
  font-weight:600;
  line-height:1.55;
  color:var(--fg-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .2s ease-out;
}
.side-post:hover b{color:var(--accent)}
.side-post span{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:.75rem;
  color:var(--fg-3);
}

/* ============ 空状态 ============ */
.empty-state{
  padding:56px 24px;
  text-align:center;
  border:1px dashed rgba(255,255,255,.2);
  border-radius:var(--r-card);
  background:rgba(255,255,255,.02);
}
.empty-state p{
  margin:0 0 18px;
  font-size:1rem;
  color:var(--fg-2);
}

/* ============ 通用卡片 ============ */
.card{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-1);
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(34,211,238,.28);
}

/* ============ 区块标题 ============ */
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:26px;
}
.section-title{
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  line-height:1.35;
  letter-spacing:-.01em;
  font-weight:650;
}
.section-sub{
  margin-top:10px;
  font-size:.9375rem;
  color:var(--fg-3);
}

/* ============ 相关阅读 ============ */
.related-section{padding:56px 0 0}
.related-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:640px){
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .related-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
}
.related-card{
  display:flex;
  flex-direction:column;
  overflow:hidden;
}
.related-card .thumb{
  position:relative;
  aspect-ratio:16/9;
  background:linear-gradient(145deg,#0E2A57,#060B14);
  overflow:hidden;
}
.related-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease-out;
}
.related-card:hover .thumb img{transform:scale(1.04)}
.related-card .thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,0) 40%,rgba(6,11,20,.75));
}
.related-card .body{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:20px;
}
.related-card h3{
  font-size:1.0625rem;
  line-height:1.55;
  font-weight:600;
  color:var(--fg);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .2s ease-out;
}
.related-card:hover h3{color:var(--accent)}
.related-card p{
  font-size:.875rem;
  line-height:1.7;
  color:var(--fg-3);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-card .foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:2px;
}
.related-card .date{
  font-family:var(--font-mono);
  font-size:.75rem;
  color:var(--fg-3);
}

/* ============ 上下篇 ============ */
.pn-section{padding:44px 0 80px}
.pn-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
@media (min-width:768px){
  .pn-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
}
.pn-card{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-1);
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.pn-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(34,211,238,.3);
}
.pn-label{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--warm);
}
.pn-card b{
  font-size:1rem;
  line-height:1.55;
  font-weight:600;
  color:var(--fg-2);
  transition:color .2s ease-out;
}
.pn-card:hover b{color:var(--accent)}
.pn-next{text-align:left}
.pn-back{
  display:flex;
  justify-content:center;
  margin-top:28px;
}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-1);
  padding:56px 0 0;
  position:relative;
  z-index:1;
}
.foot-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
@media (min-width:768px){
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:38px}
}
@media (min-width:1024px){
  .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
}
.foot-title{
  margin:0 0 14px;
  font-size:.875rem;
  font-weight:600;
  color:var(--fg);
}
.foot-link{
  display:block;
  padding:6px 0;
  font-size:.875rem;
  color:var(--fg-3);
  transition:color .2s ease-out,text-decoration-color .2s ease-out;
}
.foot-link:hover{
  color:var(--accent);
  text-decoration:underline;
  text-underline-offset:3px;
}
.lede{
  font-size:.875rem;
  line-height:1.75;
  color:var(--fg-3);
}
.form-note{
  font-size:.8125rem;
  line-height:1.7;
  color:var(--fg-3);
}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  align-items:center;
  justify-content:space-between;
  margin-top:42px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:.8125rem;
  color:var(--fg-3);
}

/* roulang page: category1 */
:root{
  --bg-0:#060B14; --bg-1:#0B1526; --bg-2:#102038;
  --brand:#0E2A57; --accent:#22D3EE; --warm:#F5A524;
  --fg:#E6EDF7; --fg-2:#C7D2E1; --fg-3:#8A9AB0;
  --ok:#34D399; --warn:#FBBF24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.18);
  --r-card:18px; --r-img:14px; --r-btn:12px;
  --shadow-1:0 8px 24px -16px rgba(0,0,0,.7);
  --shadow-2:0 24px 48px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(34,211,238,.35), 0 12px 32px -12px rgba(34,211,238,.45);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:104px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-0);color:var(--fg);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 80% 55% at 50% 0%, #000 0%, transparent 78%);
  mask-image:radial-gradient(ellipse 80% 55% at 50% 0%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(34,211,238,.22);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070D18}
::-webkit-scrollbar-thumb{background:#1B2C46;border-radius:99px;border:2px solid #070D18}
::-webkit-scrollbar-thumb:hover{background:#27405F}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:1}
@media (min-width:1024px){ .wrap{padding-left:32px;padding-right:32px} }
.sec{padding:56px 0}
@media (min-width:768px){ .sec{padding:80px 0} }
@media (min-width:1024px){ .sec{padding:96px 0} }
.mono{font-family:Inter,ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}
.lede{color:var(--fg-2);font-size:1rem;line-height:1.8;margin:0}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;width:100%;
  background:rgba(6,11,20,.72);border-bottom:1px solid transparent;
  transition:background var(--t), border-color var(--t), backdrop-filter var(--t);
}
.site-header.is-scrolled{
  background:rgba(6,11,20,.86);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
@media (min-width:1024px){ .header-inner{height:72px;gap:28px} }
.logo{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(150deg,#123A63,#0B2038);
  border:1px solid rgba(34,211,238,.35);
  box-shadow:0 0 0 1px rgba(34,211,238,.12), 0 10px 24px -16px rgba(34,211,238,.7);
  display:grid;place-items:center;
}
.logo-mark span{font-family:Inter,ui-monospace,monospace;font-weight:700;font-size:.8125rem;color:#7DE9F8;letter-spacing:.04em}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text b{font-size:1rem;font-weight:650;color:var(--fg);letter-spacing:-.01em;white-space:nowrap}
.logo-text i{font-style:normal;font-size:.6875rem;color:var(--fg-3);letter-spacing:.02em}
.nav-chips{display:none;flex:1;align-items:center;justify-content:center;gap:6px}
@media (min-width:1024px){ .nav-chips{display:flex} }
.chip{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  padding:8px 16px;border-radius:999px;border:1px solid transparent;
  color:var(--fg-2);font-size:.875rem;font-weight:500;white-space:nowrap;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.chip:hover{color:var(--fg);border-color:rgba(34,211,238,.45);background:rgba(34,211,238,.06)}
.chip.is-active{
  background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.5);
  color:#7DE9F8;font-weight:600;
}
.chip.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:3px;height:2px;
  border-radius:2px;background:var(--warm);opacity:.9;
}
.header-cta{display:none;margin-left:auto}
@media (min-width:1024px){ .header-cta{display:block;margin-left:0} }
.header-cta .btn{padding:10px 20px;font-size:.875rem}
.menu-toggle{
  margin-left:auto;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-2);
  background:rgba(255,255,255,.03);display:grid;place-content:center;gap:5px;
  transition:border-color var(--t),background var(--t);
}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--fg-2);transition:transform var(--t),opacity var(--t)}
.menu-toggle:hover{border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.07)}
@media (min-width:1024px){ .menu-toggle{display:none} }
.mobile-drawer{
  position:fixed;inset:64px 0 0 0;z-index:55;
  background:rgba(6,11,20,.98);backdrop-filter:blur(18px);
  padding:24px 20px 32px;display:none;flex-direction:column;gap:8px;
}
.mobile-drawer.is-open{display:flex}
.mobile-drawer .chip{
  display:flex;width:100%;justify-content:flex-start;padding:16px 18px;font-size:1rem;
  border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.02);
}
.mobile-drawer .chip.is-active{background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.5)}
.mobile-drawer .chip.is-active::after{display:none}
.mobile-drawer .btn{margin-top:auto;width:100%;padding:16px}
@media (min-width:1024px){ .mobile-drawer{display:none !important} }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:.9375rem;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),filter var(--t),border-color var(--t),color var(--t),background var(--t);
}
.btn-primary{
  background:linear-gradient(180deg,#4DE6F7,#12B6D6);
  color:#04212B;box-shadow:var(--glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(34,211,238,.5),0 18px 40px -14px rgba(34,211,238,.6)}
.btn-primary:active{transform:translateY(-1px);filter:brightness(.98)}
.btn-ghost{
  background:transparent;border-color:var(--line-2);color:var(--fg);
}
.btn-ghost:hover{border-color:var(--accent);color:#7DE9F8;transform:translateY(-2px);background:rgba(34,211,238,.05)}
.btn-ghost:active{transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none !important;filter:none !important}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:#7DE9F8;font-size:.875rem;font-weight:600;
  border-bottom:1px solid transparent;transition:color var(--t),border-color var(--t),gap var(--t);
}
.link-arrow:hover{color:var(--accent);border-color:rgba(34,211,238,.6);gap:10px}

/* ============ 标签 / 徽章 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:.8125rem;font-weight:500;letter-spacing:.01em;
  background:rgba(245,165,36,.1);border:1px solid rgba(245,165,36,.32);color:#F7C061;
}
.tag-cool{background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.32);color:#7DE9F8}
.tag-soft{background:rgba(255,255,255,.04);border-color:var(--line-2);color:var(--fg-2)}
.badge-num{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  font-family:Inter,ui-monospace,monospace;font-weight:700;font-size:.875rem;
  background:rgba(245,165,36,.12);border:1px solid rgba(245,165,36,.35);color:var(--warm);
}

/* ============ 卡片 ============ */
.card{
  background:linear-gradient(180deg,rgba(16,32,56,.72),rgba(11,21,38,.72));
  border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.28)}
.glass{
  background:rgba(11,21,38,.6);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
}
.sec-head{max-width:760px}
.sec-head h2{
  font-size:clamp(1.5rem,3.2vw,2.125rem);font-weight:650;line-height:1.25;letter-spacing:-.015em;
  margin-bottom:12px;
}
.sec-head p{color:var(--fg-2);font-size:1rem;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;
  font-family:Inter,ui-monospace,monospace;font-size:.75rem;letter-spacing:.08em;
  text-transform:uppercase;color:#7DE9F8;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--accent),transparent)}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ Hero ============ */
.hero-cat{
  position:relative;overflow:hidden;
  background-image:
    linear-gradient(180deg,rgba(6,11,20,.62) 0%,rgba(6,11,20,.86) 62%,rgba(6,11,20,.98) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  padding:64px 0 56px;
}
@media (min-width:1024px){ .hero-cat{padding:104px 0 88px} }
.hero-cat::after{
  content:"";position:absolute;right:-160px;top:-160px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(34,211,238,.16);
  box-shadow:0 0 0 60px rgba(34,211,238,.03), 0 0 0 140px rgba(34,211,238,.02);
  pointer-events:none;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8125rem;color:var(--fg-3);margin-bottom:20px}
.crumb a{transition:color var(--t)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--fg-2)}
.hero-cat h1{
  font-size:clamp(2rem,5vw,3.5rem);line-height:1.12;letter-spacing:-.02em;font-weight:700;
  max-width:20ch;
}
.hero-cat .sub{margin-top:18px;font-size:1.0625rem;line-height:1.8;color:var(--fg-2);max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-facts{
  display:grid;grid-template-columns:1fr;gap:16px;margin-top:44px;
  padding-top:26px;border-top:1px solid var(--line);
}
@media (min-width:640px){ .hero-facts{grid-template-columns:repeat(3,1fr);gap:24px} }
.fact .k{font-family:Inter,ui-monospace,monospace;font-size:1.375rem;font-weight:700;color:#7DE9F8;line-height:1.2}
.fact .v{font-size:.875rem;color:var(--fg-3);margin-top:6px}

/* ============ 非对称卖点 ============ */
.asym{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:1024px){ .asym{grid-template-columns:7fr 5fr;gap:32px} }
.asym-right{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px) and (max-width:1023px){ .asym-right{grid-template-columns:1fr 1fr} }
.spot-lg{padding:0;overflow:hidden;display:flex;flex-direction:column}
.spot-lg .cover{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-card) var(--r-card) 0 0}
.spot-lg .cover img{width:100%;height:100%;object-fit:cover}
.spot-lg .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,20,.15),rgba(6,11,20,.7))}
.spot-lg .body{padding:24px}
@media (min-width:1024px){ .spot-lg .body{padding:28px} }
.spot-sm{padding:24px;display:flex;flex-direction:column;gap:12px}
.spot-sm .num{
  font-family:Inter,ui-monospace,monospace;font-size:.8125rem;font-weight:700;color:var(--warm);
  opacity:.9;letter-spacing:.06em;
}
.spot-sm h3{font-size:1.125rem;font-weight:600;line-height:1.45}
.spot-sm p{font-size:.9375rem;color:var(--fg-2);line-height:1.8}
.card h3{font-size:1.1875rem;font-weight:600;line-height:1.45;letter-spacing:-.01em}

/* ============ 核对清单（左栏 + 长卡） ============ */
.check-layout{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){ .check-layout{grid-template-columns:3fr 9fr;gap:32px} }
.side-sticky{position:static}
@media (min-width:1024px){ .side-sticky{position:sticky;top:96px} }
.side-panel{padding:22px;border-radius:var(--r-card)}
.side-panel h3{font-size:.9375rem;font-weight:600;color:var(--fg);margin-bottom:14px;letter-spacing:.01em}
.filter-group{display:flex;flex-wrap:wrap;gap:8px}
@media (min-width:1024px){ .filter-group{flex-direction:column;flex-wrap:nowrap} }
.filter{
  display:inline-flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 14px;border-radius:999px;border:1px solid var(--line);
  font-size:.875rem;color:var(--fg-2);background:rgba(255,255,255,.02);
  transition:color var(--t),border-color var(--t),background var(--t);
}
@media (min-width:1024px){ .filter{border-radius:12px;padding:11px 14px} }
.filter:hover{color:var(--fg);border-color:rgba(34,211,238,.45);background:rgba(34,211,238,.05)}
.filter.is-current{background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.5);color:#7DE9F8;font-weight:600}
.filter .cnt{font-family:Inter,ui-monospace,monospace;font-size:.75rem;color:var(--fg-3)}
.filter.is-current .cnt{color:#7DE9F8}
.side-note{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);font-size:.8125rem;color:var(--fg-3);line-height:1.7}

.long-list{display:flex;flex-direction:column;gap:16px}
.long-card{
  display:grid;grid-template-columns:1fr;gap:18px;padding:18px;
  border-radius:var(--r-card);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,32,56,.6),rgba(11,21,38,.7));
  box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
@media (min-width:768px){ .long-card{grid-template-columns:30% 1fr;gap:22px;padding:20px;align-items:center} }
.long-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.3)}
.long-thumb{
  position:relative;aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;
  background:linear-gradient(140deg,#12294A,#0A1729);
}
.long-thumb img{width:100%;height:100%;object-fit:cover}
.long-thumb .fallback{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  font-size:.75rem;color:rgba(230,237,247,.35);letter-spacing:.04em;padding:12px;
}
.long-body{min-width:0}
.long-body h3{font-size:1.125rem;font-weight:600;line-height:1.45}
.long-body p{font-size:.9375rem;color:var(--fg-2);line-height:1.8;margin-top:10px}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:14px;
  font-size:.8125rem;color:var(--fg-3);
}
.meta-row .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.7}
.long-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:16px}

/* ============ 编号流 / 时间轴 ============ */
.flow{position:relative;display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:1024px){ .flow{grid-template-columns:repeat(3,1fr);gap:28px} }
.step{
  position:relative;padding:24px;border-radius:var(--r-card);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,32,56,.55),rgba(11,21,38,.68));
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(10px);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
@media (min-width:1024px){ .step:nth-child(2){transform:translateY(-16px)} .step:nth-child(2):hover{transform:translateY(-18px)} }
.step:hover{box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.3);transform:translateY(-2px)}
.step .big-num{
  font-family:Inter,ui-monospace,monospace;font-size:2.25rem;font-weight:700;
  color:var(--warm);opacity:.9;line-height:1;
}
.step h3{margin-top:14px;font-size:1.125rem;font-weight:600}
.step p{margin-top:10px;font-size:.9375rem;color:var(--fg-2);line-height:1.8}
.step .link-arrow{margin-top:16px}

.timeline{position:relative;display:grid;grid-template-columns:1fr;gap:18px;padding-left:26px}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--accent),rgba(34,211,238,.05));
}
.tl-item{position:relative;padding:20px 22px;border-radius:var(--r-card);border:1px solid var(--line);background:rgba(11,21,38,.62);box-shadow:var(--shadow-1);transition:border-color var(--t),transform var(--t)}
.tl-item:hover{border-color:rgba(34,211,238,.3);transform:translateX(2px)}
.tl-item::before{
  content:"";position:absolute;left:-25px;top:26px;width:13px;height:13px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--accent);box-shadow:0 0 12px rgba(34,211,238,.6);
}
.tl-item .tl-k{font-family:Inter,ui-monospace,monospace;font-size:.75rem;color:var(--warm);letter-spacing:.06em}
.tl-item h3{margin-top:8px;font-size:1.0625rem;font-weight:600}
.tl-item p{margin-top:8px;font-size:.9375rem;color:var(--fg-2);line-height:1.8}

/* ============ 场景网格 ============ */
.scene-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:640px){ .scene-grid{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1024px){ .scene-grid{grid-template-columns:repeat(3,1fr);gap:24px} }
.scene{padding:22px;border-radius:var(--r-card);border:1px solid var(--line);background:rgba(16,32,56,.42);transition:border-color var(--t),background var(--t),transform var(--t)}
.scene:hover{border-color:rgba(34,211,238,.32);background:rgba(16,32,56,.72);transform:translateY(-2px)}
.scene .ico{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);
  font-family:Inter,ui-monospace,monospace;color:#7DE9F8;font-weight:700;font-size:.875rem;
}
.scene h3{margin-top:16px;font-size:1.0625rem;font-weight:600}
.scene p{margin-top:8px;font-size:.9375rem;color:var(--fg-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){ .faq-layout{grid-template-columns:3fr 9fr;gap:44px} }
.faq-side{position:static}
@media (min-width:1024px){ .faq-side{position:sticky;top:100px;align-self:start} }
.faq-side h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:650;line-height:1.3;letter-spacing:-.015em}
.faq-side p{margin-top:12px;color:var(--fg-2);font-size:.9375rem;line-height:1.85}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);padding-left:0;transition:box-shadow var(--t)}
.faq-item[open]{box-shadow:inset 2px 0 0 0 var(--accent), -6px 0 22px -12px rgba(34,211,238,.75)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
  gap:18px;padding:20px 4px 20px 16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font-size:1rem;font-weight:600;line-height:1.6;color:var(--fg)}
.faq-item summary:hover h3{color:#7DE9F8}
.sign{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--line-2);color:var(--fg-2);font-size:1rem;line-height:1;
  transition:transform var(--t),color var(--t),border-color var(--t);
}
.faq-item summary:hover .sign{border-color:rgba(34,211,238,.5);color:#7DE9F8}
.faq-item[open] .sign{transform:rotate(45deg);color:#7DE9F8;border-color:rgba(34,211,238,.55)}
.faq-answer{padding:0 4px 22px 16px;color:var(--fg-2);font-size:.9375rem;line-height:1.85;max-width:68ch}

/* ============ CTA ============ */
.cta-band{
  border-radius:22px;border:1px solid rgba(34,211,238,.22);
  background:
    radial-gradient(120% 140% at 15% 0%, rgba(34,211,238,.14), transparent 58%),
    linear-gradient(180deg,rgba(16,32,56,.86),rgba(11,21,38,.9));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:36px 22px;text-align:center;box-shadow:var(--shadow-2);
}
@media (min-width:768px){ .cta-band{padding:52px 44px} }
.cta-band h2{font-size:clamp(1.5rem,3.2vw,2.125rem);font-weight:650;line-height:1.3;letter-spacing:-.015em}
.cta-band p{margin:14px auto 0;max-width:60ch;color:var(--fg-2);font-size:1rem;line-height:1.85}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:28px}
.cta-points{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px}
.cta-points span{
  padding:6px 14px;border-radius:999px;font-size:.8125rem;color:var(--fg-2);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}

/* ============ 分节分页 ============ */
.pager{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:44px}
.pager-btn{
  display:grid;place-items:center;min-width:44px;height:44px;padding:0 14px;
  border-radius:12px;border:1px solid var(--line-2);color:var(--fg-2);
  font-family:Inter,ui-monospace,monospace;font-size:.875rem;font-weight:600;
  background:rgba(255,255,255,.02);transition:var(--t);
}
.pager-btn:hover{border-color:rgba(34,211,238,.5);color:#7DE9F8;transform:translateY(-2px)}
.pager-btn.is-current{border-color:var(--accent);color:#7DE9F8;box-shadow:var(--glow);background:rgba(34,211,238,.08)}

/* ============ 表单 ============ */
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:.8125rem;color:var(--fg-3)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.04);border:1px solid var(--line-2);color:var(--fg);
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.field input::placeholder,.field textarea::placeholder{color:rgba(138,154,176,.75)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,211,238,.16);background:rgba(255,255,255,.06);
}
.form-note{font-size:.8125rem;color:var(--fg-3);line-height:1.7}

/* ============ 页脚 ============ */
.site-footer{margin-top:64px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(11,21,38,.72),rgba(6,11,20,.96));position:relative;z-index:1}
.site-footer .wrap{padding-top:56px;padding-bottom:28px}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){ .foot-grid{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px} }
.site-footer .logo-text b{font-size:.9375rem}
.foot-title{font-size:.875rem;font-weight:600;color:var(--fg);margin-bottom:16px;letter-spacing:.02em}
.foot-link{
  display:inline-block;padding:6px 0;font-size:.875rem;color:var(--fg-3);
  transition:color var(--t),text-decoration-color var(--t);
  text-decoration:underline;text-decoration-color:transparent;text-underline-offset:4px;
  text-decoration-thickness:2px;
}
.foot-link:hover{color:var(--accent);text-decoration-color:rgba(34,211,238,.7)}
.foot-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:.8125rem;color:var(--fg-3);
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1526;
  --bg-2:#102038;
  --brand:#0E2A57;
  --accent:#22D3EE;
  --warm:#F5A524;
  --fg:#E6EDF7;
  --fg-2:#C7D2E1;
  --fg-3:#8A9AB0;
  --ok:#34D399;
  --warn:#FBBF24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --shadow-1:0 8px 24px -16px rgba(0,0,0,.7);
  --shadow-2:0 24px 48px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(34,211,238,.35), 0 12px 32px -12px rgba(34,211,238,.45);
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--fg);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(34,211,238,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 30% 10%,rgba(0,0,0,.9),transparent 72%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em;line-height:1.3}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:rgba(34,211,238,.25);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#05090F}
::-webkit-scrollbar-thumb{background:#1B2C46;border-radius:999px;border:2px solid #05090F}
::-webkit-scrollbar-thumb:hover{background:#27425F}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
@media (min-width:1024px){.wrap{padding:0 32px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,11,20,.75);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,11,20,.88);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
@media (min-width:1024px){.header-inner{height:72px}}

.logo{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,#123A72,#0B1526);
  border:1px solid rgba(34,211,238,.35);
  box-shadow:var(--glow);
  color:#7DE9F7;font-family:var(--mono);font-weight:700;font-size:.78rem;letter-spacing:.04em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text b{font-size:.95rem;font-weight:650;color:var(--fg)}
.logo-text i{font-style:normal;font-size:.72rem;color:var(--fg-3);letter-spacing:.02em}

.nav-chips{display:none}
@media (min-width:1024px){
  .nav-chips{
    display:flex;align-items:center;gap:6px;
    padding:5px;border-radius:999px;
    background:rgba(11,21,38,.72);
    border:1px solid var(--line);
  }
}
.chip{
  position:relative;display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;font-size:.875rem;color:var(--fg-2);
  border:1px solid transparent;
  transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out;
  white-space:nowrap;
}
.chip:hover{color:var(--fg);border-color:rgba(34,211,238,.35)}
.chip.is-active{background:rgba(34,211,238,.12);color:#A5F3FC;border-color:rgba(34,211,238,.3)}
.chip.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;width:18px;height:2px;border-radius:2px;
  background:var(--warm);transform:translateX(-50%);
}
.header-cta{display:none}
@media (min-width:1024px){.header-cta{display:inline-flex}}

.burger{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;gap:5px;
  background:rgba(11,21,38,.8);border:1px solid var(--line);cursor:pointer;
  transition:border-color .2s ease-out;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--fg-2);transition:transform .2s ease-out,opacity .2s ease-out}
.burger:hover{border-color:rgba(34,211,238,.45)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (min-width:1024px){.burger{display:none}}

.drawer{
  position:fixed;inset:64px 0 0 0;z-index:70;
  background:rgba(6,11,20,.98);
  backdrop-filter:blur(18px);
  padding:28px 20px 40px;
  display:none;flex-direction:column;gap:10px;
  overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer-nav{display:flex;flex-direction:column;gap:8px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 18px;border-radius:14px;font-size:1rem;color:var(--fg-2);
  background:rgba(11,21,38,.7);border:1px solid var(--line);
  transition:border-color .2s ease-out,color .2s ease-out,background .2s ease-out;
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:#A5F3FC;border-color:rgba(34,211,238,.35);background:rgba(34,211,238,.08)}
.drawer-nav a span{font-family:var(--mono);font-size:.75rem;color:var(--fg-3)}
.drawer .btn{width:100%;margin-top:14px}
@media (min-width:1024px){.drawer{display:none !important}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:.9375rem;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out,filter .2s ease-out;
  white-space:nowrap;
}
.btn-primary{
  color:#03121A;
  background:linear-gradient(120deg,#22D3EE,#0EA5B7);
  box-shadow:var(--glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(34,211,238,.5),0 16px 38px -12px rgba(34,211,238,.55)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{color:var(--fg);background:transparent;border-color:rgba(255,255,255,.18)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 18px;font-size:.875rem}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.875rem;color:var(--accent);
  transition:gap .2s ease-out,color .2s ease-out;
}
.link-arrow:hover{gap:10px;color:#7DE9F7}

/* ============ 通用卡片 ============ */
.card{
  background:linear-gradient(160deg,rgba(16,32,56,.72),rgba(11,21,38,.9));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
}
.card-hover{transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.28)}

.glass{
  background:rgba(11,21,38,.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;font-size:.75rem;letter-spacing:.01em;
  background:rgba(34,211,238,.1);color:#8FE7F5;border:1px solid rgba(34,211,238,.22);
}
.tag-warm{background:rgba(245,165,36,.12);color:#F7C46B;border-color:rgba(245,165,36,.26)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 通用板块 ============ */
.section{padding:56px 0;position:relative}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-alt{
  background:linear-gradient(180deg,rgba(11,21,38,.65),rgba(6,11,20,.2));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
section[id],div[id]{scroll-margin-top:88px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:32px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--warm)}
.sec-title{font-size:1.6rem}
@media (min-width:1024px){.sec-title{font-size:2.1rem}}
.sec-desc{color:var(--fg-2);font-size:.9375rem;max-width:62ch;margin-top:12px;line-height:1.85}

/* ============ Banner ============ */
.banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.42}
.banner-shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.6) 0%,rgba(6,11,20,.86) 55%,rgba(6,11,20,.97) 100%);
}
.banner-ring{
  position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(34,211,238,.16);
  box-shadow:inset 0 0 0 1px rgba(34,211,238,.06);
  pointer-events:none;
}
.banner-ring::after{
  content:"";position:absolute;inset:70px;border-radius:50%;
  border:1px solid rgba(34,211,238,.1);
}
.banner-inner{position:relative;z-index:2;padding-top:56px;padding-bottom:48px}
@media (min-width:1024px){.banner-inner{padding-top:84px;padding-bottom:64px}}
.banner h1{
  font-size:clamp(2rem,5vw,3.4rem);
  line-height:1.12;letter-spacing:-.02em;font-weight:700;
  max-width:20ch;
}
.banner-lede{
  margin-top:18px;font-size:1.0625rem;color:#A5F3FC;font-weight:600;letter-spacing:.01em;
}
.banner-sub{margin-top:12px;color:var(--fg-2);font-size:.9375rem;max-width:56ch;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.jump-chips{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;padding-top:26px;
  border-top:1px solid var(--line);
}
.jump-chips a{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;
  font-size:.8125rem;color:var(--fg-2);
  background:rgba(11,21,38,.7);border:1px solid var(--line);
  transition:border-color .2s ease-out,color .2s ease-out,background .2s ease-out;
}
.jump-chips a:hover{color:#A5F3FC;border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.08)}

/* ============ 步骤流 ============ */
.step-grid{display:grid;gap:20px;position:relative}
@media (min-width:768px){.step-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.step-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.step-grid::before{
  content:"";position:absolute;left:0;right:0;top:56px;height:1px;display:none;
  background:linear-gradient(90deg,rgba(34,211,238,0),rgba(34,211,238,.45),rgba(34,211,238,0));
}
@media (min-width:1024px){.step-grid::before{display:block}}
.step-card{position:relative;z-index:2;padding:26px 24px;display:flex;flex-direction:column;gap:12px}
@media (min-width:1024px){.step-card:nth-child(2){margin-top:16px}}
.step-no{
  font-family:var(--mono);font-size:1.6rem;font-weight:700;color:var(--warm);opacity:.92;line-height:1;
  letter-spacing:.02em;
}
.step-card h3{font-size:1.0625rem;font-weight:600;color:var(--fg)}
.step-card p{font-size:.9rem;color:var(--fg-2);line-height:1.8}
.step-card .link-arrow{margin-top:auto;padding-top:6px}

/* ============ 设备混合网格 ============ */
.device-grid{display:grid;gap:20px}
@media (min-width:1024px){.device-grid{grid-template-columns:2fr 1fr;gap:24px}}
.device-main,.device-side{overflow:hidden;display:flex;flex-direction:column}
.device-main figure,.device-side figure{margin:0;position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#102038,#060B14)}
.device-side figure{aspect-ratio:16/10}
.device-main figure img,.device-side figure img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.device-main:hover figure img,.device-side:hover figure img{transform:scale(1.03)}
.device-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.device-body h3{font-size:1.15rem;font-weight:650}
.device-body p{font-size:.9125rem;color:var(--fg-2);line-height:1.85}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.8125rem;color:var(--fg-3);font-family:var(--mono)}
.meta-row i{font-style:normal;width:1px;height:12px;background:var(--line-2);display:inline-block}

.mini-grid{display:grid;gap:20px;margin-top:20px}
@media (min-width:640px){.mini-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.mini-grid{grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}}
.mini-card{padding:24px;display:flex;flex-direction:column;gap:12px}
.mini-card h3{font-size:1.0625rem;font-weight:600}
.mini-card p{font-size:.9rem;color:var(--fg-2);line-height:1.8}
.mini-card .meta-row{margin-top:auto;padding-top:6px}

/* ============ 核对清单（非对称） ============ */
.check-grid{display:grid;gap:24px}
@media (min-width:1024px){.check-grid{grid-template-columns:7fr 5fr;gap:32px;align-items:start}}
.check-figure{margin:0;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;background:linear-gradient(140deg,#102038,#060B14)}
@media (min-width:1024px){.check-figure{aspect-ratio:21/9}}
.check-figure img{width:100%;height:100%;object-fit:cover}
.check-panel{padding:26px 24px;margin-top:24px}
.check-panel h3{font-size:1.2rem;margin-bottom:12px}
.check-panel p{font-size:.9375rem;color:var(--fg-2);line-height:1.85}
.check-list{display:flex;flex-direction:column;gap:16px}
.check-item{padding:22px;display:flex;gap:16px;align-items:flex-start}
.check-item .num{
  font-family:var(--mono);font-size:.8125rem;color:var(--warm);
  border:1px solid rgba(245,165,36,.3);border-radius:8px;padding:4px 8px;flex:0 0 auto;
  background:rgba(245,165,36,.08);
}
.check-item h4{font-size:1rem;font-weight:600;margin-bottom:6px}
.check-item p{font-size:.875rem;color:var(--fg-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-grid{display:grid;gap:28px}
@media (min-width:1024px){.faq-grid{grid-template-columns:4fr 8fr;gap:40px;align-items:start}}
.faq-aside h2{font-size:1.5rem}
@media (min-width:1024px){.faq-aside h2{font-size:1.9rem}}
.faq-aside p{color:var(--fg-2);font-size:.9375rem;margin-top:14px;line-height:1.85}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0 20px 16px;font-size:1rem;font-weight:600;color:var(--fg);
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#A5F3FC}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:2px;border-radius:2px;
  background:transparent;transition:background .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open] summary::before{background:var(--accent);box-shadow:0 0 12px rgba(34,211,238,.75)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;transition:transform .2s ease-out}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--fg-3);border-radius:2px;transition:background .2s ease-out}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--accent)}
.faq-body{padding:0 0 22px 16px;color:var(--fg-2);font-size:.9125rem;line-height:1.85;max-width:70ch}

/* ============ CTA ============ */
.cta-box{
  padding:44px 24px;text-align:center;
  background:linear-gradient(150deg,rgba(16,32,56,.8),rgba(11,21,38,.92));
  border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-2);position:relative;overflow:hidden;
}
@media (min-width:768px){.cta-box{padding:64px 48px}}
.cta-box::after{
  content:"";position:absolute;left:50%;bottom:-160px;width:420px;height:320px;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(34,211,238,.16),transparent);pointer-events:none;
}
.cta-box h2{font-size:1.55rem;position:relative;z-index:2}
@media (min-width:1024px){.cta-box h2{font-size:2rem}}
.cta-box p{color:var(--fg-2);font-size:.9375rem;margin:14px auto 0;max-width:56ch;line-height:1.85;position:relative;z-index:2}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px;position:relative;z-index:2}
.cta-note{margin-top:18px;font-size:.8125rem;color:var(--fg-3);position:relative;z-index:2}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,21,38,.55),rgba(6,11,20,.95));
  padding:56px 0 28px;position:relative;z-index:1;
}
@media (min-width:1024px){.site-footer{padding:72px 0 32px}}
.foot-grid{display:grid;gap:36px}
@media (min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.foot-title{font-size:.9375rem;font-weight:650;color:var(--fg);margin-bottom:16px}
.foot-link{
  display:inline-flex;padding:6px 0;font-size:.875rem;color:var(--fg-3);
  transition:color .2s ease-out;
}
.foot-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:.8125rem;color:var(--fg-3);
}
.lede{font-size:.9rem;color:var(--fg-2);line-height:1.8}
.form-note{font-size:.8125rem;color:var(--fg-3);line-height:1.7}

/* roulang page: category3 */
:root{
    --bg-0:#060B14;
    --bg-1:#0B1526;
    --bg-2:#102038;
    --brand:#0E2A57;
    --accent:#22D3EE;
    --warm:#F5A524;
    --fg:#E6EDF7;
    --fg-2:#C7D2E1;
    --fg-3:#8A9AB0;
    --ok:#34D399;
    --warn:#FBBF24;
    --line:rgba(255,255,255,.08);
    --line-2:rgba(255,255,255,.14);
    --r-card:18px;
    --r-img:14px;
    --r-btn:12px;
    --shadow-1:0 8px 24px -16px rgba(0,0,0,.7);
    --shadow-2:0 24px 48px -24px rgba(0,0,0,.8);
    --glow:0 0 0 1px rgba(34,211,238,.35), 0 12px 32px -12px rgba(34,211,238,.45);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;scroll-padding-top:100px;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--fg);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
    background-size:64px 64px;
    pointer-events:none;
    z-index:0;
    -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 0%,transparent 78%);
    mask-image:radial-gradient(ellipse at 50% 0%,#000 0%,transparent 78%);
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}

  ::selection{background:rgba(34,211,238,.28);color:#fff}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:#060B14}
  ::-webkit-scrollbar-thumb{background:#1B2C46;border-radius:999px;border:2px solid #060B14}
  ::-webkit-scrollbar-thumb:hover{background:#2A405F}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;box-shadow:0 0 0 4px rgba(34,211,238,.2);border-radius:6px}

  .wrap{max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
  @media (min-width:1024px){.wrap{padding:0 32px}}

  .mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}
  .lede{color:var(--fg-2);font-size:1.0625rem;line-height:1.8}
  .muted{color:var(--fg-3)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:.8125rem;letter-spacing:.02em;color:var(--accent);
    padding:6px 14px;border-radius:999px;
    border:1px solid rgba(34,211,238,.32);
    background:rgba(34,211,238,.08);
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(34,211,238,.9)}

  /* ============ Header / Nav ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    height:64px;
    background:rgba(6,11,20,.72);
    border-bottom:1px solid transparent;
    transition:background .2s ease-out,backdrop-filter .2s ease-out,border-color .2s ease-out;
  }
  .site-header.is-scrolled{
    background:rgba(6,11,20,.86);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
  }
  @media (min-width:1024px){.site-header{height:72px}}
  .header-inner{height:100%;display:flex;align-items:center;gap:20px;justify-content:space-between}
  .logo{display:flex;align-items:center;gap:12px;flex:none}
  .logo-mark{
    width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
    background:linear-gradient(160deg,#102038,#0E2A57);
    border:1px solid rgba(34,211,238,.45);
    box-shadow:0 0 18px -6px rgba(34,211,238,.55);
  }
  .logo-mark span{
    font-family:ui-monospace,Menlo,monospace;font-weight:700;font-size:.8125rem;
    color:#9BEDFB;letter-spacing:.04em;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15}
  .logo-text b{font-size:.9375rem;font-weight:700;color:var(--fg);letter-spacing:-.01em}
  .logo-text i{font-style:normal;font-size:.6875rem;color:var(--fg-3);letter-spacing:.02em}

  .nav-chips{display:none;align-items:center;gap:6px;padding:5px;border-radius:999px;border:1px solid var(--line);background:rgba(16,32,56,.4)}
  @media (min-width:1024px){.nav-chips{display:flex}}
  .chip{
    display:inline-flex;align-items:center;
    padding:8px 16px;border-radius:999px;
    font-size:.875rem;color:var(--fg-2);
    border:1px solid transparent;
    transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
    white-space:nowrap;
  }
  .chip:hover{color:var(--fg);background:rgba(255,255,255,.04);border-color:var(--line-2)}
  .chip.is-active{
    color:#A9F1FC;
    background:rgba(34,211,238,.12);
    border-color:rgba(34,211,238,.45);
    box-shadow:inset 0 -2px 0 rgba(245,165,36,.9);
  }

  .header-cta{display:none}
  @media (min-width:1024px){.header-cta{display:block;flex:none}}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:0 20px;height:44px;border-radius:var(--r-btn);
    font-size:.9375rem;font-weight:600;letter-spacing:.01em;
    cursor:pointer;border:1px solid transparent;
    transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out,opacity .2s ease-out;
    white-space:nowrap;
  }
  .btn-sm{height:38px;padding:0 16px;font-size:.875rem}
  .btn-primary{
    background:linear-gradient(180deg,#22D3EE 0%,#0B5D74 100%);
    color:#F2FEFF;
    box-shadow:var(--glow);
    text-shadow:0 1px 2px rgba(0,20,28,.55);
  }
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(34,211,238,.5),0 18px 40px -14px rgba(34,211,238,.6)}
  .btn-primary:active{transform:translateY(-1px)}
  .btn-ghost{
    background:transparent;color:var(--fg-2);
    border-color:rgba(255,255,255,.18);
  }
  .btn-ghost:hover{color:var(--accent);border-color:rgba(34,211,238,.6);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(-1px)}
  .btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}

  .arrow-link{
    display:inline-flex;align-items:center;gap:6px;
    font-size:.875rem;color:var(--accent);
    transition:gap .2s ease-out,color .2s ease-out;
  }
  .arrow-link svg{width:14px;height:14px;transition:transform .2s ease-out}
  .arrow-link:hover{gap:10px}
  .arrow-link:hover svg{transform:translateX(2px)}

  .burger{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;border-radius:12px;
    border:1px solid var(--line-2);background:rgba(16,32,56,.5);cursor:pointer;
  }
  .burger span{display:block;height:1.5px;width:18px;margin:0 auto;background:var(--fg-2);transition:transform .2s ease-out,opacity .2s ease-out}
  @media (min-width:1024px){.burger{display:none}}
  .burger.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  .burger.is-open span:nth-child(2){opacity:0}
  .burger.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

  .drawer{
    display:none;position:fixed;left:0;right:0;top:64px;bottom:0;z-index:55;
    background:rgba(6,11,20,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    padding:24px 20px 32px;flex-direction:column;gap:8px;overflow-y:auto;
  }
  .drawer.is-open{display:flex}
  .drawer .chip{justify-content:flex-start;padding:16px 18px;font-size:1rem;border-radius:14px;border-color:var(--line)}
  .drawer .btn{margin-top:16px;width:100%}
  @media (min-width:1024px){.drawer{display:none!important}}

  /* ============ Page Hero ============ */
  .page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
  .page-hero-bg{
    position:absolute;inset:0;
    background-size:cover;background-position:center;
    transform:scale(1.03);
  }
  .page-hero-mask{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,11,20,.74) 0%,rgba(6,11,20,.9) 62%,rgba(6,11,20,.98) 100%);
  }
  .page-hero::after{
    content:"";position:absolute;left:50%;top:-180px;width:620px;height:620px;margin-left:-310px;
    border-radius:50%;border:1px solid rgba(34,211,238,.14);
    box-shadow:0 0 0 1px rgba(34,211,238,.06) inset;
    pointer-events:none;
  }
  .page-hero-inner{position:relative;z-index:2;padding:56px 0 48px}
  @media (min-width:768px){.page-hero-inner{padding:72px 0 60px}}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--fg-3);margin-bottom:20px;line-height:1.4}
  .crumbs a{color:var(--fg-3);transition:color .2s ease-out}
  .crumbs a:hover{color:var(--accent)}
  .crumbs .sep{color:rgba(255,255,255,.22)}
  .crumbs .now{color:var(--fg-2)}
  .page-hero h1{
    font-size:clamp(1.75rem,3.6vw,2.875rem);
    line-height:1.18;font-weight:700;letter-spacing:-.02em;
    margin:18px 0 14px;max-width:24ch;
  }
  .page-hero .lede{max-width:62ch}
  .hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}

  /* ============ Sections ============ */
  .section{padding:56px 0;position:relative;z-index:1}
  @media (min-width:768px){.section{padding:80px 0}}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-alt{background:linear-gradient(180deg,rgba(11,21,38,0) 0%,rgba(11,21,38,.75) 18%,rgba(11,21,38,.75) 82%,rgba(11,21,38,0) 100%)}
  .section-head{margin-bottom:36px}
  .section-head h2{
    font-size:clamp(1.5rem,2.4vw,2rem);
    font-weight:650;letter-spacing:-.015em;line-height:1.28;
    margin-bottom:12px;
  }
  .section-head p{color:var(--fg-2);max-width:66ch}

  /* ============ Cards ============ */
  .card{
    background:var(--bg-1);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(34,211,238,.32)}
  .card-media{overflow:hidden;border-radius:var(--r-img);background:linear-gradient(160deg,#102038,#0B1526);position:relative}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
  .card-hover:hover .card-media img{transform:scale(1.04)}

  /* Steps */
  .steps{display:grid;gap:22px;position:relative}
  @media (min-width:768px){.steps{grid-template-columns:repeat(3,1fr);gap:24px}}
  .steps::before{
    content:"";position:absolute;left:6%;right:6%;top:64px;height:1px;
    background:linear-gradient(90deg,rgba(34,211,238,0),rgba(34,211,238,.5),rgba(245,165,36,.4),rgba(34,211,238,0));
    display:none;
  }
  @media (min-width:768px){.steps::before{display:block}}
  .step-card{padding:26px 24px 24px;position:relative;z-index:1}
  .step-num{
    font-family:ui-monospace,Menlo,monospace;font-size:2.5rem;line-height:1;
    color:var(--warm);opacity:.9;letter-spacing:-.02em;
  }
  .step-card h3{font-size:1.125rem;font-weight:600;margin:16px 0 10px}
  .step-card p{color:var(--fg-2);font-size:.9375rem;line-height:1.8}
  @media (min-width:768px){.step-card:nth-child(2){transform:translateY(-16px)}}
  @media (max-width:767px){.step-card{transform:none!important}}

  /* Scene cards */
  .scene-grid{display:grid;gap:22px}
  @media (min-width:768px){.scene-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.scene-grid{grid-template-columns:repeat(3,1fr)}}
  .scene-card{padding:18px;display:flex;flex-direction:column;height:100%}
  .scene-card .card-media{aspect-ratio:16/9;margin-bottom:18px}
  .scene-card h3{font-size:1.0625rem;font-weight:600;margin-bottom:8px}
  .scene-card p{color:var(--fg-2);font-size:.9375rem;flex:1}
  .tag{
    display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
    font-size:.75rem;letter-spacing:.02em;
    color:var(--fg-2);border:1px solid var(--line-2);background:rgba(255,255,255,.03);
  }
  .tag-accent{color:#A9F1FC;border-color:rgba(34,211,238,.42);background:rgba(34,211,238,.1)}
  .tag-warm{color:#FBD38D;border-color:rgba(245,165,36,.42);background:rgba(245,165,36,.1)}

  /* Layout 8/4 */
  .qa-layout{display:grid;gap:28px}
  @media (min-width:1024px){.qa-layout{grid-template-columns:2fr 1fr;gap:36px;align-items:start}}

  .qa-group{margin-bottom:34px}
  .qa-group:last-child{margin-bottom:0}
  .qa-group > h2{
    font-size:1.25rem;font-weight:650;line-height:1.4;
    padding-left:14px;position:relative;margin-bottom:6px;
  }
  .qa-group > h2::before{
    content:"";position:absolute;left:0;top:.35em;bottom:.35em;width:4px;border-radius:3px;
    background:linear-gradient(180deg,var(--accent),rgba(34,211,238,.2));
    box-shadow:0 0 14px rgba(34,211,238,.55);
  }
  .qa-group > .group-note{color:var(--fg-3);font-size:.875rem;margin-bottom:12px;padding-left:14px}
  .qa-panel{border:1px solid var(--line);border-radius:var(--r-card);background:rgba(11,21,38,.7);padding:4px 20px;box-shadow:var(--shadow-1)}

  .faq-item{border-bottom:1px solid var(--line);position:relative}
  .faq-item:last-child{border-bottom:0}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;gap:16px;justify-content:space-between;
    padding:18px 4px 18px 16px;background:none;border:0;text-align:left;cursor:pointer;
    color:var(--fg);font-size:1rem;font-weight:600;line-height:1.6;
    transition:color .2s ease-out;
  }
  .faq-q::before{
    content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
    background:linear-gradient(180deg,var(--accent),rgba(34,211,238,.12));
    box-shadow:0 0 12px rgba(34,211,238,.7);
    opacity:0;transition:opacity .2s ease-out;
  }
  .faq-item.is-open .faq-q::before{opacity:1}
  .faq-q:hover{color:#A9F1FC}
  .faq-icon{
    flex:none;width:24px;height:24px;display:grid;place-items:center;
    border-radius:8px;border:1px solid var(--line-2);color:var(--fg-2);
    font-family:ui-monospace,Menlo,monospace;font-size:1rem;line-height:1;
    transition:transform .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--accent);border-color:rgba(34,211,238,.5)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
  .faq-item.is-open .faq-a{max-height:480px}
  .faq-a-inner{padding:0 44px 22px 16px;color:var(--fg-2);font-size:.9375rem;line-height:1.8}
  .faq-a-inner strong{color:#A9F1FC;font-weight:600}

  /* Hot list */
  .hot-sticky{position:sticky;top:96px}
  .hot-panel{padding:24px 22px 18px}
  .hot-panel h2{font-size:1.0625rem;font-weight:650;margin-bottom:6px}
  .hot-panel .hint{font-size:.8125rem;color:var(--fg-3);margin-bottom:14px}
  .hot-item{display:flex;gap:14px;align-items:flex-start;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.09);transition:color .2s ease-out}
  .hot-item:last-child{border-bottom:0}
  .hot-item:hover{color:#A9F1FC}
  .hot-num{font-family:ui-monospace,Menlo,monospace;font-size:.8125rem;color:var(--warm);flex:none;padding-top:3px;letter-spacing:.02em}
  .hot-text{font-size:.9375rem;line-height:1.65;color:var(--fg-2);transition:color .2s ease-out}
  .hot-item:hover .hot-text{color:#A9F1FC}

  .info-box{
    margin-top:20px;padding:18px 20px;border-radius:var(--r-card);
    border:1px solid rgba(245,165,36,.28);background:rgba(245,165,36,.06);
  }
  .info-box h3{font-size:.9375rem;font-weight:600;color:#FBD38D;margin-bottom:8px}
  .info-box p{font-size:.875rem;color:var(--fg-2);line-height:1.75}

  /* ============ CTA band ============ */
  .cta-band{position:relative;padding:64px 0;z-index:1}
  @media (min-width:1024px){.cta-band{padding:88px 0}}
  .cta-panel{
    position:relative;overflow:hidden;border-radius:24px;
    border:1px solid rgba(34,211,238,.26);
    background:linear-gradient(150deg,rgba(16,32,56,.9),rgba(11,21,38,.94));
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    padding:44px 24px;text-align:center;
    box-shadow:var(--shadow-2);
  }
  @media (min-width:768px){.cta-panel{padding:56px 40px}}
  .cta-panel::after{
    content:"";position:absolute;left:50%;bottom:-240px;width:520px;height:520px;margin-left:-260px;
    border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.18),transparent 66%);
    pointer-events:none;
  }
  .cta-panel h2{font-size:clamp(1.375rem,2.4vw,1.875rem);font-weight:650;letter-spacing:-.015em;margin-bottom:12px}
  .cta-panel p{color:var(--fg-2);max-width:56ch;margin:0 auto}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px;position:relative;z-index:2}
  .cta-actions .btn{min-width:180px}

  /* ============ Footer ============ */
  .site-footer{
    position:relative;z-index:1;margin-top:24px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg,rgba(11,21,38,.6),rgba(6,11,20,1));
    padding:56px 0 28px;
  }
  .foot-grid{display:grid;gap:36px}
  @media (min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr);gap:40px}}
  @media (min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:48px}}
  .foot-title{font-size:.9375rem;font-weight:650;color:var(--fg);margin-bottom:16px;letter-spacing:.01em}
  .foot-link{
    display:inline-block;padding:5px 0;font-size:.875rem;color:var(--fg-3);
    transition:color .2s ease-out;
  }
  .foot-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1.5px}
  .form-note{font-size:.8125rem;color:var(--fg-3);line-height:1.7}
  .foot-bottom{
    margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:.8125rem;color:var(--fg-3);
  }
  @media (max-width:767px){.foot-bottom{flex-direction:column}}