/* roulang page: index */
:root{
  --sk-bg-900:#060915;
  --sk-bg-800:#0A1024;
  --sk-bg-700:#111834;
  --sk-surface:rgba(255,255,255,.055);
  --sk-surface-2:rgba(255,255,255,.09);
  --sk-line:rgba(255,255,255,.12);
  --sk-primary:#3E6BFF;
  --sk-primary-600:#2A4CE0;
  --sk-primary-soft:rgba(62,107,255,.14);
  --sk-accent:#2FE0C8;
  --sk-gold:#FFC96B;
  --sk-text:#EAEEFB;
  --sk-text-2:#A8B2CC;
  --sk-text-3:#6C7793;
  --sk-nav-bg:#FFFFFF;
  --sk-nav-line:#E6E9F2;
  --sk-nav-text:#1B2237;
  --sk-nav-soft:#F2F4FA;
  --sk-ink:#1B2237;
  --sk-ink-2:#5B6580;
  --sk-light-bg:#F6F8FD;
  --sk-light-line:#E7EAF3;
  --sk-radius-xl:24px;
  --sk-radius-lg:18px;
  --sk-radius-md:14px;
  --sk-radius-sm:12px;
  --sk-radius-pill:999px;
  --sk-grad:linear-gradient(135deg,#3E6BFF 0%,#6C4CFF 100%);
  --sk-shadow-glow:0 10px 28px rgba(62,107,255,.38);
  --sk-shadow-card:0 6px 20px rgba(16,24,54,.08);
  --sk-ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.8;
  color:var(--sk-text);
  background:var(--sk-bg-900);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--sk-primary);outline-offset:3px;border-radius:6px}
.sk-skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:#fff;color:var(--sk-ink);padding:12px 18px;border-radius:0 0 12px 0;font-size:14px;font-weight:600;
}
.sk-skip:focus{left:0}
.grid-container.sk-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto}

/* ---------- 顶部导航 ---------- */
.sk-header{
  position:sticky;top:0;z-index:80;
  background:var(--sk-nav-bg);
  border-bottom:1px solid var(--sk-nav-line);
  box-shadow:0 2px 10px rgba(17,24,52,.05);
  transition:box-shadow .2s var(--sk-ease);
}
.sk-header.is-scrolled{box-shadow:0 6px 18px rgba(17,24,52,.10)}
.sk-nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:64px}
.sk-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--sk-nav-text);white-space:nowrap;letter-spacing:0}
.sk-brand svg{width:22px;height:22px;flex:none}
.sk-menu{display:flex;align-items:center;gap:26px}
.sk-menu a{
  position:relative;display:block;padding:20px 0;
  font-size:14.5px;font-weight:500;color:#3B4560;
  transition:color .2s var(--sk-ease);
}
.sk-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:13px;height:2px;border-radius:2px;
  background:var(--sk-primary);opacity:0;transform:scaleX(.55);
  transition:opacity .2s var(--sk-ease),transform .2s var(--sk-ease);
}
.sk-menu a:hover{color:var(--sk-primary)}
.sk-menu a:hover::after{opacity:.4;transform:scaleX(1)}
.sk-menu a.is-active{color:var(--sk-primary)}
.sk-menu a.is-active::after{opacity:1;transform:scaleX(1)}
.sk-nav__tools{display:flex;align-items:center;gap:14px}
.sk-search{position:relative;display:flex;align-items:center}
.sk-search svg{position:absolute;left:14px;width:16px;height:16px;stroke:#8A93AB;fill:none;stroke-width:1.6}
.sk-search input{
  width:196px;height:40px;border-radius:var(--sk-radius-pill);
  border:1px solid transparent;background:var(--sk-nav-soft);
  padding:0 16px 0 40px;font-size:14px;color:var(--sk-nav-text);
  transition:border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease),background .2s var(--sk-ease);
}
.sk-search input::placeholder{color:#8A93AB}
.sk-search input:focus{
  outline:none;background:#fff;border-color:var(--sk-primary);
  box-shadow:0 0 0 3px rgba(62,107,255,.18);
}
.sk-nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--sk-radius-sm);
  border:1px solid var(--sk-nav-line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.sk-nav-toggle span{display:block;width:17px;height:2px;border-radius:2px;background:var(--sk-nav-text);transition:transform .2s var(--sk-ease),opacity .2s var(--sk-ease)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.sk-mobile{display:none;background:#fff;border-top:1px solid var(--sk-nav-line)}
.sk-mobile.is-open{display:block}
.sk-mobile ul{padding:4px 24px 14px}
.sk-mobile a{
  display:flex;align-items:center;height:48px;font-size:14px;font-weight:500;
  color:#3B4560;border-bottom:1px solid var(--sk-nav-line);
}
.sk-mobile a.is-active{color:var(--sk-primary)}
.sk-mobile li:last-child a{border-bottom:none}

/* ---------- 通用按钮 / 徽章 ---------- */
.sk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--sk-radius-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--sk-ease),box-shadow .2s var(--sk-ease),background .2s var(--sk-ease),border-color .2s var(--sk-ease),color .2s var(--sk-ease);
}
.sk-btn--primary{background:var(--sk-grad);color:#fff;box-shadow:var(--sk-shadow-glow)}
.sk-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(62,107,255,.5)}
.sk-btn--primary:active{transform:translateY(0)}
.sk-btn--ghost{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.22);color:var(--sk-text)}
.sk-btn--ghost:hover{transform:translateY(-2px);border-color:rgba(62,107,255,.75);color:#fff}
.sk-btn--sm{height:40px;padding:0 20px;font-size:14px}
.sk-btn--block{width:100%}
.sk-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--sk-radius-pill);
  font-size:12px;font-weight:500;background:var(--sk-primary-soft);color:#9FB4FF;white-space:nowrap;
}
.sk-badge--plain{background:var(--sk-nav-soft);color:#5B6580}
.sk-link-ghost{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--sk-primary);transition:color .2s var(--sk-ease)}
.sk-link-ghost:hover{color:#8FA8FF;text-decoration:underline;text-underline-offset:3px}

/* ---------- Hero ---------- */
.sk-hero{position:relative;overflow:hidden;background:var(--sk-bg-900);border-bottom:1px solid rgba(255,255,255,.06)}
.sk-hero__media{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.sk-hero__shade{position:absolute;inset:0;background:linear-gradient(105deg,rgba(6,9,21,.94) 0%,rgba(6,9,21,.74) 48%,rgba(6,9,21,.58) 100%)}
.sk-hero__stars{
  position:absolute;inset:0;opacity:.16;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1.4px),radial-gradient(rgba(160,190,255,.85) 1px,transparent 1.4px);
  background-size:130px 130px,190px 190px;
  background-position:0 0,60px 80px;
  animation:sk-twinkle 10s ease-in-out infinite alternate;
}
@keyframes sk-twinkle{from{opacity:.10}to{opacity:.17}}
.sk-hero__inner{position:relative;display:flex;align-items:center;min-height:600px;padding:76px 0 84px}
.sk-hero__grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;width:100%}
.sk-hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;
  padding:5px 14px;border-radius:var(--sk-radius-pill);
  background:rgba(62,107,255,.16);border:1px solid rgba(62,107,255,.32);
  font-size:12.5px;font-weight:500;color:#B7C6FF;
}
.sk-hero h1{
  font-size:clamp(30px,4.4vw,52px);line-height:1.2;font-weight:700;letter-spacing:0;
  margin:0 0 18px;max-width:620px;
}
.sk-hl{background:var(--sk-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sk-hero__sub{font-size:17px;line-height:1.8;color:var(--sk-text-2);max-width:560px}
.sk-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 34px}
.sk-metrics{display:flex;flex-wrap:wrap;gap:28px}
.sk-metrics li{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--sk-text-2)}
.sk-metrics svg{width:20px;height:20px;stroke:var(--sk-accent);fill:none;stroke-width:1.6;flex:none}
.sk-glass{
  background:var(--sk-surface);border:1px solid var(--sk-line);border-radius:var(--sk-radius-lg);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}
.sk-entry{padding:28px}
.sk-entry__title{font-size:17px;font-weight:600;color:#fff;margin-bottom:16px}
.sk-entry__list{display:grid;gap:12px;margin-bottom:22px}
.sk-entry__list li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:var(--sk-text-2)}
.sk-entry__list svg{width:18px;height:18px;flex:none;margin-top:5px;stroke:var(--sk-accent);fill:none;stroke-width:1.8}
.sk-entry__note{margin-top:14px;font-size:12.5px;color:var(--sk-text-3);line-height:1.7}

/* ---------- 板块基础 ---------- */
.sk-section{padding:96px 0}
.sk-section--tight{padding:76px 0}
.sk-head{margin-bottom:32px}
.sk-head__row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.sk-eyebrow{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--sk-accent);margin-bottom:10px}
.sk-h2{font-size:clamp(24px,3vw,34px);line-height:1.32;font-weight:700;margin-bottom:12px}
.sk-lead{font-size:15.5px;color:var(--sk-text-2);max-width:640px}

/* ---------- 品牌主张带 ---------- */
.sk-band{background:var(--sk-bg-800);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.sk-band__grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;padding:88px 0}
.sk-band__title{font-size:28px;line-height:1.35;font-weight:700;margin-bottom:12px}
.sk-band__text{font-size:15px;color:var(--sk-text-2)}
.sk-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.sk-point{padding:24px;border-radius:var(--sk-radius-lg);background:var(--sk-surface);border:1px solid var(--sk-line);transition:transform .24s var(--sk-ease),border-color .24s var(--sk-ease)}
.sk-point:hover{transform:translateY(-4px);border-color:rgba(62,107,255,.42)}
.sk-point:nth-child(2),.sk-point:nth-child(4){transform:translateY(18px)}
.sk-point:nth-child(2):hover,.sk-point:nth-child(4):hover{transform:translateY(14px)}
.sk-point__no{font-size:12.5px;font-weight:600;color:var(--sk-gold);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.sk-point__title{font-size:18px;font-weight:600;color:#fff;margin:10px 0 8px}
.sk-point__text{font-size:14.5px;line-height:1.75;color:var(--sk-text-2)}

/* ---------- 步骤 / 图文区 ---------- */
.sk-story__grid{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:56px;align-items:center}
.sk-story__media{position:relative;border-radius:var(--sk-radius-lg);overflow:hidden;aspect-ratio:16/10;background:linear-gradient(150deg,#101A38,#060915)}
.sk-story__media img{width:100%;height:100%;object-fit:cover}
.sk-story__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,9,21,.05),rgba(6,9,21,.35))}
.sk-steps{display:grid;gap:26px}
.sk-step{display:grid;grid-template-columns:56px minmax(0,1fr);gap:16px;align-items:start}
.sk-step__no{
  width:56px;height:56px;border-radius:var(--sk-radius-md);
  border:1px solid rgba(62,107,255,.42);color:#9FB4FF;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;font-variant-numeric:tabular-nums;
  background:rgba(62,107,255,.10);
}
.sk-step__title{font-size:19px;font-weight:600;color:#fff;margin-bottom:6px}
.sk-step__text{font-size:14.5px;line-height:1.8;color:var(--sk-text-2)}

/* ---------- 浅色精选区 ---------- */
.sk-light{background:var(--sk-light-bg);color:var(--sk-ink)}
.sk-light .sk-h2{color:var(--sk-ink)}
.sk-light .sk-lead{color:var(--sk-ink-2)}
.sk-light .sk-eyebrow{color:var(--sk-primary)}
.sk-feature{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,3fr) minmax(0,3fr);grid-template-rows:auto auto;gap:28px}
.sk-feature__main{grid-column:1;grid-row:1/3}
.sk-feature__a{grid-column:2/4;grid-row:1}
.sk-feature__b{grid-column:2/4;grid-row:2}
.sk-card--plain{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--sk-light-line);
  border-radius:var(--sk-radius-lg);overflow:hidden;box-shadow:var(--sk-shadow-card);
  transition:transform .24s var(--sk-ease),box-shadow .24s var(--sk-ease),border-color .24s var(--sk-ease);
}
.sk-card--plain:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(16,24,54,.14);border-color:rgba(62,107,255,.4)}
.sk-card__media{position:relative;background:linear-gradient(150deg,#E8EDFB,#D7DFF6);overflow:hidden}
.sk-card__media img{width:100%;height:100%;object-fit:cover}
.sk-feature__main .sk-card__media{aspect-ratio:16/10}
.sk-feature__a .sk-card__media,.sk-feature__b .sk-card__media{aspect-ratio:16/6}
.sk-card__badge{position:absolute;left:16px;top:16px;background:rgba(255,255,255,.92);color:var(--sk-primary);border-radius:var(--sk-radius-pill);font-size:12px;font-weight:600;padding:4px 12px}
.sk-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.sk-card--plain h3{font-size:19px;line-height:1.45;font-weight:600;color:var(--sk-ink)}
.sk-feature__main h3{font-size:21px}
.sk-card--plain p{font-size:14.5px;line-height:1.75;color:var(--sk-ink-2)}
.sk-card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}
.sk-card__time{font-size:13px;color:#8A93AB;font-variant-numeric:tabular-nums}
.sk-card--plain:hover .sk-card__arrow{transform:translateX(4px)}
.sk-card__arrow{font-size:15px;color:var(--sk-primary);transition:transform .2s var(--sk-ease)}

/* ---------- 最新信息列表 ---------- */
.sk-posts{border-top:1px solid rgba(255,255,255,.10)}
.sk-post{
  display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:22px;align-items:center;
  min-height:88px;padding:16px 16px;border-bottom:1px solid rgba(255,255,255,.10);
  transition:background .2s var(--sk-ease);
}
.sk-post:hover{background:rgba(255,255,255,.04)}
.sk-post__date{
  width:64px;height:64px;border-radius:var(--sk-radius-md);
  background:rgba(62,107,255,.10);border:1px solid rgba(62,107,255,.24);
  display:flex;align-items:center;justify-content:center;text-align:center;
  padding:6px;font-size:11.5px;line-height:1.3;color:#9FB4FF;
  font-variant-numeric:tabular-nums;word-break:break-word;
}
.sk-post__title{display:block;font-size:17px;font-weight:600;color:var(--sk-text)}
.sk-post__desc{
  display:block;font-size:14px;color:var(--sk-text-3);margin-top:4px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:760px;
}
.sk-post__meta{display:flex;align-items:center;gap:16px}
.sk-post__arrow{color:var(--sk-primary);font-size:16px;transition:transform .2s var(--sk-ease)}
.sk-post:hover .sk-post__arrow{transform:translateX(4px)}
.sk-empty{
  min-height:200px;border:1px dashed rgba(255,255,255,.18);border-radius:var(--sk-radius-lg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;padding:32px;
}
.sk-empty svg{width:40px;height:40px;stroke:rgba(62,107,255,.4);fill:none;stroke-width:1.4}
.sk-empty p{font-size:15px;color:var(--sk-text-2)}
.sk-posts__foot{display:flex;justify-content:center;margin-top:32px}

/* ---------- 信任背书 ---------- */
.sk-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding:34px 0;border-top:1px solid rgba(255,255,255,.10);border-bottom:1px solid rgba(255,255,255,.10)}
.sk-stat__num{font-size:32px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--sk-accent);line-height:1.2}
.sk-stat__label{font-size:13px;color:var(--sk-text-3);margin-top:6px}
.sk-trust__tags{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 32px}
.sk-tag{font-size:12.5px;color:#8792AD;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:var(--sk-radius-pill);padding:6px 14px}
.sk-quotes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.sk-quote{padding:26px;border-radius:var(--sk-radius-lg);background:var(--sk-surface);border:1px solid var(--sk-line)}
.sk-quote__mark{font-size:26px;line-height:1;color:var(--sk-gold)}
.sk-quote p{font-size:15px;line-height:1.8;color:var(--sk-text-2);margin:12px 0 16px}
.sk-quote__by{font-size:13px;color:var(--sk-text-3)}

/* ---------- FAQ ---------- */
.sk-faq__grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:start}
.sk-acc{
  background:rgba(255,255,255,.045);border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-md);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--sk-ease);
}
.sk-acc:hover{border-color:rgba(62,107,255,.4)}
.sk-acc summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;font-size:17px;font-weight:500;color:var(--sk-text);
}
.sk-acc summary::-webkit-details-marker{display:none}
.sk-acc summary::after{
  content:"";width:9px;height:9px;flex:none;margin-right:4px;
  border-right:2px solid var(--sk-text-2);border-bottom:2px solid var(--sk-text-2);
  transform:rotate(45deg) translate(-2px,-2px);transition:transform .2s var(--sk-ease);
}
.sk-acc[open] summary::after{transform:rotate(225deg) translate(-2px,-2px)}
.sk-acc__body{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--sk-text-2)}
.sk-side{padding:28px}
.sk-side h3{font-size:17px;font-weight:600;color:#fff;margin-bottom:16px}
.sk-side__list{display:grid;gap:12px;margin-bottom:22px}
.sk-side__list a{display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--sk-text-2);transition:color .2s var(--sk-ease)}
.sk-side__list a:hover{color:var(--sk-primary)}
.sk-side__list svg{width:18px;height:18px;stroke:var(--sk-primary);fill:none;stroke-width:1.7;flex:none}
.sk-side__note{margin-top:14px;font-size:12.5px;color:var(--sk-text-3);line-height:1.7}

/* ---------- CTA ---------- */
.sk-cta{
  background:linear-gradient(120deg,rgba(62,107,255,.16) 0%,rgba(47,224,200,.10) 100%),var(--sk-bg-800);
  border:1px solid rgba(255,255,255,.10);border-radius:var(--sk-radius-xl);
  padding:48px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:40px;align-items:center;
}
.sk-cta h2{font-size:26px;line-height:1.35;font-weight:700;margin-bottom:10px}
.sk-cta p{font-size:15px;color:var(--sk-text-2)}
.sk-subscribe{display:flex;gap:12px;align-items:stretch}
.sk-subscribe label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.sk-subscribe input{
  flex:1;min-width:0;height:48px;border-radius:var(--sk-radius-sm);
  border:1px solid var(--sk-line);background:rgba(255,255,255,.06);
  padding:0 16px;font-size:15px;color:var(--sk-text);
  transition:border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease);
}
.sk-subscribe input::placeholder{color:#7C88A8}
.sk-subscribe input:focus{outline:none;border-color:var(--sk-primary);box-shadow:0 0 0 3px rgba(62,107,255,.2)}
.sk-form-tip{margin-top:12px;font-size:12.5px;color:var(--sk-text-3);min-height:20px}
.sk-form-tip.is-ok{color:var(--sk-accent)}

/* ---------- 页脚 ---------- */
.sk-footer{background:var(--sk-bg-900);border-top:1px solid rgba(255,255,255,.10);padding-top:64px;margin-top:8px}
.sk-footer__grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.sk-footer__brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:#fff;margin-bottom:14px}
.sk-footer__brand svg{width:22px;height:22px;flex:none}
.sk-footer__text{font-size:14px;line-height:1.9;color:#A8B2CC;margin-bottom:10px}
.sk-footer h4{font-size:14px;font-weight:600;color:var(--sk-primary);margin-bottom:18px}
.sk-footer__list{display:grid;gap:2px}
.sk-footer__list a{font-size:14px;color:#A8B2CC;line-height:1.9;transition:color .2s var(--sk-ease)}
.sk-footer__list a:hover{color:var(--sk-primary);text-decoration:underline;text-underline-offset:3px}
.sk-footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.08);margin-top:48px;padding:22px 0 32px;
  font-size:13px;color:var(--sk-text-3);
}
.sk-footer__bottom a{color:var(--sk-text-3);transition:color .2s var(--sk-ease)}
.sk-footer__bottom a:hover{color:var(--sk-primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .sk-search{display:none}
}
@media (max-width:1024px){
  .sk-section{padding:72px 0}
  .sk-hero__inner{min-height:auto;padding:64px 0 72px}
  .sk-hero__grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .sk-band__grid{grid-template-columns:minmax(0,1fr);gap:36px;padding:72px 0}
  .sk-story__grid{grid-template-columns:minmax(0,1fr);gap:36px}
  .sk-story__grid--reverse .sk-story__media{order:0}
  .sk-feature{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:auto}
  .sk-feature__main{grid-column:1/3;grid-row:auto}
  .sk-feature__a{grid-column:1/2;grid-row:auto}
  .sk-feature__b{grid-column:2/3;grid-row:auto}
  .sk-feature__a .sk-card__media,.sk-feature__b .sk-card__media{aspect-ratio:16/10}
  .sk-faq__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .sk-cta{grid-template-columns:minmax(0,1fr);gap:28px;padding:36px}
  .sk-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .sk-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
}
@media (max-width:768px){
  .sk-menu{display:none}
  .sk-nav-toggle{display:flex}
  .sk-nav{height:56px}
  .sk-nav__tools .sk-btn{display:none}
  .sk-section{padding:56px 0}
  .sk-section--tight{padding:48px 0}
  .sk-hero__inner{padding:48px 0 56px}
  .sk-hero__actions{margin:24px 0 28px}
  .sk-metrics{gap:16px}
  .sk-points{grid-template-columns:minmax(0,1fr);gap:16px}
  .sk-point:nth-child(2),.sk-point:nth-child(4){transform:none}
  .sk-point:nth-child(2):hover,.sk-point:nth-child(4):hover{transform:translateY(-4px)}
  .sk-feature{grid-template-columns:minmax(0,1fr);gap:20px}
  .sk-feature__main,.sk-feature__a,.sk-feature__b{grid-column:1/2}
  .sk-quotes{grid-template-columns:minmax(0,1fr)}
  .sk-post{grid-template-columns:56px minmax(0,1fr);gap:14px;padding:16px 8px}
  .sk-post__date{width:56px;height:56px;font-size:10.5px}
  .sk-post__meta{grid-column:2/3;justify-content:flex-start}
  .sk-post__desc{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .sk-subscribe{flex-direction:column}
  .sk-subscribe .sk-btn{width:100%}
  .sk-footer{padding-top:48px}
  .sk-footer__grid{grid-template-columns:minmax(0,1fr)}
  .sk-footer__bottom{flex-direction:column;align-items:flex-start;text-align:left}
  .sk-cta{padding:28px 24px}
}
@media (max-width:520px){
  .grid-container.sk-container{padding-left:18px;padding-right:18px}
  .sk-hero h1{font-size:30px}
  .sk-hero__sub{font-size:15.5px}
  .sk-stats{grid-template-columns:minmax(0,1fr)}
  .sk-step{grid-template-columns:46px minmax(0,1fr);gap:12px}
  .sk-step__no{width:46px;height:46px;font-size:15px}
  .sk-acc summary{font-size:16px;padding:14px 16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --sk-bg-900:#060915;
  --sk-bg-800:#0A1024;
  --sk-bg-700:#111834;
  --sk-surface:rgba(255,255,255,.055);
  --sk-surface-2:rgba(255,255,255,.09);
  --sk-line:rgba(255,255,255,.12);
  --sk-primary:#3E6BFF;
  --sk-primary-600:#2A4CE0;
  --sk-primary-soft:rgba(62,107,255,.14);
  --sk-accent:#2FE0C8;
  --sk-gold:#FFC96B;
  --sk-text:#EAEEFB;
  --sk-text-2:#A8B2CC;
  --sk-text-3:#6C7793;
  --sk-nav-bg:#FFFFFF;
  --sk-nav-line:#E6E9F2;
  --sk-nav-text:#1B2237;
  --sk-nav-soft:#F2F4FA;
  --sk-gradient:linear-gradient(135deg,#3E6BFF 0%,#6C4CFF 100%);
  --sk-shadow-glow:0 10px 28px rgba(62,107,255,.38);
  --sk-shadow-soft:0 6px 20px rgba(16,24,54,.08);
  --sk-radius-lg:18px;
  --sk-radius-md:14px;
  --sk-radius-sm:12px;
  --sk-ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--sk-bg-900);
  color:var(--sk-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--sk-primary);outline-offset:2px;border-radius:6px}
.sk-visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sk-skip{position:absolute;left:-9999px;top:8px;z-index:200;background:#fff;color:#1B2237;padding:10px 18px;border-radius:999px;font-size:14px}
.sk-skip:focus{left:16px}
.sk-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sk-num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.sk-header{
  position:sticky;top:0;z-index:80;
  background:var(--sk-nav-bg);
  border-bottom:1px solid var(--sk-nav-line);
  box-shadow:0 2px 10px rgba(17,24,52,.05);
  transition:box-shadow .2s var(--sk-ease);
}
.sk-header.is-scrolled{box-shadow:0 6px 18px rgba(17,24,52,.10)}
.sk-nav{display:flex;align-items:center;gap:26px;height:64px}
.sk-brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:var(--sk-nav-text);white-space:nowrap}
.sk-brand svg{width:22px;height:22px;flex:0 0 auto}
.sk-menu{display:flex;align-items:center;gap:30px;margin-left:12px}
.sk-menu a{position:relative;display:inline-block;padding:6px 0;font-size:14.5px;font-weight:500;color:#3C465F;transition:color .2s var(--sk-ease)}
.sk-menu a::after{content:"";position:absolute;left:0;right:0;bottom:-16px;height:2px;background:var(--sk-primary);opacity:0;transition:opacity .2s var(--sk-ease)}
.sk-menu a:hover,.sk-menu a:focus-visible{color:var(--sk-primary)}
.sk-menu a:hover::after{opacity:.4}
.sk-menu a.is-active{color:var(--sk-primary)}
.sk-menu a.is-active::after{opacity:1}
.sk-nav__tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.sk-search{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:999px;background:var(--sk-nav-soft);border:1px solid transparent;transition:background .2s var(--sk-ease),border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease)}
.sk-search svg{width:18px;height:18px;flex:0 0 auto;fill:none;stroke:#8A93AB;stroke-width:1.7}
.sk-search input{width:150px;border:0;background:transparent;outline:none;font-size:14px;color:var(--sk-nav-text)}
.sk-search input::placeholder{color:#8A93AB}
.sk-search:focus-within{background:#fff;border-color:var(--sk-primary);box-shadow:0 0 0 3px rgba(62,107,255,.18)}
.sk-nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border-radius:12px;align-items:center;border:1px solid var(--sk-nav-line)}
.sk-nav-toggle span{display:block;width:18px;height:1.8px;background:var(--sk-nav-text);border-radius:2px;transition:transform .2s var(--sk-ease),opacity .2s var(--sk-ease)}
.sk-nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sk-nav-toggle.is-open span:nth-child(2){opacity:0}
.sk-nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.sk-mobile{display:none;background:#fff;border-top:1px solid var(--sk-nav-line)}
.sk-mobile.is-open{display:block}
.sk-mobile ul{padding:4px 24px 16px}
.sk-mobile li a{display:block;height:48px;line-height:48px;font-size:14px;font-weight:500;color:#3C465F;border-bottom:1px solid var(--sk-nav-line)}
.sk-mobile li:last-child a{border-bottom:0}
.sk-mobile li a.is-active{color:var(--sk-primary)}

/* ---------- buttons / badges ---------- */
.sk-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;transition:transform .2s var(--sk-ease),box-shadow .2s var(--sk-ease),border-color .2s var(--sk-ease),background .2s var(--sk-ease),color .2s var(--sk-ease)}
.sk-btn--primary{background:var(--sk-gradient);color:#fff;box-shadow:var(--sk-shadow-glow)}
.sk-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(62,107,255,.5)}
.sk-btn--primary:active{transform:translateY(0)}
.sk-btn--ghost{background:transparent;border-color:var(--sk-line);color:var(--sk-text)}
.sk-btn--ghost:hover{border-color:var(--sk-primary);color:#fff;transform:translateY(-2px)}
.sk-btn--sm{height:40px;padding:0 20px;font-size:14px}
.sk-btn--block{width:100%}
.sk-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:500;background:var(--sk-primary-soft);color:#9DB6FF}
.sk-badge--plain{background:var(--sk-nav-soft);color:#5B6580}

/* ---------- crumbs & article head ---------- */
.sk-article-hero{position:relative;padding:34px 0 40px;border-bottom:1px solid var(--sk-line);background:linear-gradient(180deg,rgba(62,107,255,.08),rgba(6,9,21,0))}
.sk-article-hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);background-size:26px 26px;opacity:.12;pointer-events:none}
.sk-crumbs{position:relative;z-index:1;display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--sk-text-3);margin-bottom:22px}
.sk-crumbs a{color:var(--sk-text-2)}
.sk-crumbs a:hover{color:var(--sk-accent);text-decoration:underline;text-underline-offset:3px}
.sk-crumbs__now{color:#D7DEF5;max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sk-article__head{position:relative;z-index:1;max-width:860px}
.sk-article__head h1{margin:16px 0 18px;font-size:clamp(26px,3.6vw,40px);line-height:1.3;font-weight:700;letter-spacing:0}
.sk-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:14px;color:var(--sk-text-3)}
.sk-meta__item{display:inline-flex;align-items:center;gap:7px}
.sk-meta__item svg{width:16px;height:16px;fill:none;stroke:var(--sk-accent);stroke-width:1.6}

/* ---------- layout ---------- */
.sk-body{padding:52px 0 88px}
.sk-layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:48px;align-items:start}
.sk-post{min-width:0}
.sk-prose{font-size:16.5px;line-height:1.9;color:var(--sk-text);word-wrap:break-word}
.sk-prose>*:first-child{margin-top:0}
.sk-prose p{margin:0 0 1.15em;color:#DCE3F7}
.sk-prose h2{position:relative;margin:44px 0 18px;padding-left:14px;font-size:26px;line-height:1.35;font-weight:700;color:#fff}
.sk-prose h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:3px;background:var(--sk-gradient)}
.sk-prose h3{margin:32px 0 14px;font-size:20px;line-height:1.45;font-weight:600;color:#fff}
.sk-prose h4{margin:24px 0 12px;font-size:17px;font-weight:600;color:#fff}
.sk-prose ul{margin:0 0 1.2em}
.sk-prose ul li{position:relative;padding-left:20px;margin-bottom:10px;color:#DCE3F7}
.sk-prose ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--sk-primary)}
.sk-prose ol{margin:0 0 1.2em;padding-left:1.4em;list-style:decimal}
.sk-prose ol li{margin-bottom:10px;color:#DCE3F7}
.sk-prose ol li::marker{color:var(--sk-accent);font-weight:600}
.sk-prose blockquote{margin:26px 0;padding:18px 22px;background:var(--sk-surface);border-left:3px solid var(--sk-primary);border-radius:0 var(--sk-radius-md) var(--sk-radius-md) 0;color:var(--sk-text-2)}
.sk-prose blockquote p:last-child{margin-bottom:0}
.sk-prose img{margin:26px auto;border-radius:var(--sk-radius-md);box-shadow:0 12px 30px rgba(0,0,0,.35)}
.sk-prose figure{margin:26px 0}
.sk-prose figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--sk-text-3)}
.sk-prose a{color:var(--sk-accent);border-bottom:1px solid rgba(47,224,200,.35)}
.sk-prose a:hover{border-bottom-color:var(--sk-accent)}
.sk-prose strong{color:#fff}
.sk-prose hr{margin:36px 0;border:0;border-top:1px solid var(--sk-line)}
.sk-prose code{padding:2px 7px;border-radius:6px;background:var(--sk-bg-700);color:#BFD0FF;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px}
.sk-prose pre{margin:24px 0;padding:20px;border-radius:var(--sk-radius-sm);background:#070B1A;border:1px solid var(--sk-line);overflow-x:auto}
.sk-prose pre code{background:none;padding:0;color:#C9D5FF;font-size:13.5px;line-height:1.7}
.sk-prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px}
.sk-prose thead{background:rgba(62,107,255,.12)}
.sk-prose th{padding:12px 14px;text-align:left;font-weight:600;color:#fff;white-space:nowrap}
.sk-prose td{padding:12px 14px;border-top:1px solid var(--sk-line);color:#DCE3F7}

/* ---------- tags / share / footer of post ---------- */
.sk-tags{display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 0;padding-top:26px;border-top:1px solid var(--sk-line)}
.sk-tags a{padding:5px 14px;border-radius:999px;background:var(--sk-surface);border:1px solid var(--sk-line);font-size:13px;color:var(--sk-text-2);transition:border-color .2s var(--sk-ease),color .2s var(--sk-ease)}
.sk-tags a:hover{border-color:rgba(62,107,255,.55);color:#fff}
.sk-post__foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:26px}
.sk-share{display:flex;align-items:center;gap:10px}
.sk-share span{font-size:13px;color:var(--sk-text-3)}
.sk-share button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--sk-line);background:var(--sk-surface);transition:transform .2s var(--sk-ease),border-color .2s var(--sk-ease)}
.sk-share button:hover{transform:translateY(-2px);border-color:var(--sk-primary)}
.sk-share svg{width:18px;height:18px;fill:none;stroke:var(--sk-text-2);stroke-width:1.6}

/* ---------- empty ---------- */
.sk-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;min-height:200px;padding:40px 24px;border:1px dashed var(--sk-line);border-radius:var(--sk-radius-lg);background:var(--sk-surface);text-align:center}
.sk-empty svg{width:40px;height:40px;fill:none;stroke:rgba(62,107,255,.45);stroke-width:1.5}
.sk-empty p{font-size:15px;color:var(--sk-text-2)}

/* ---------- sidebar ---------- */
.sk-side{position:sticky;top:96px;display:grid;gap:22px}
.sk-card{border-radius:var(--sk-radius-lg);border:1px solid var(--sk-line);padding:24px}
.sk-card--glass{background:var(--sk-surface);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.sk-card__title{font-size:17px;font-weight:600;color:#fff;margin-bottom:14px}
.sk-card__note{margin-top:14px;font-size:12.5px;color:var(--sk-text-3);line-height:1.7}
.sk-checks li{position:relative;padding-left:22px;margin-bottom:12px;font-size:14px;color:#CBD4EC;line-height:1.7}
.sk-checks li::before{content:"";position:absolute;left:0;top:.55em;width:11px;height:11px;border-radius:3px;background:rgba(47,224,200,.16);border:1px solid rgba(47,224,200,.6)}
.sk-entry .sk-btn{margin-top:6px}
.sk-mini{display:grid;gap:14px}
.sk-mini a{display:grid;grid-template-columns:56px minmax(0,1fr);gap:12px;align-items:center;padding:8px;border-radius:var(--sk-radius-sm);transition:background .2s var(--sk-ease),transform .2s var(--sk-ease)}
.sk-mini a:hover{background:var(--sk-surface-2);transform:translateY(-2px)}
.sk-mini img{width:56px;height:56px;object-fit:cover;border-radius:10px;background:var(--sk-bg-700)}
.sk-mini strong{display:block;font-size:14px;font-weight:600;color:#E6EBFB;line-height:1.5}
.sk-mini em{display:block;font-style:normal;font-size:12.5px;color:var(--sk-text-3);margin-top:3px}

/* ---------- related ---------- */
.sk-related{padding:0 0 92px}
.sk-section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.sk-section__head h2{font-size:28px;font-weight:700;color:#fff}
.sk-section__head p{margin-top:8px;font-size:14px;color:var(--sk-text-3)}
.sk-ghost-link{font-size:14px;color:var(--sk-accent);border-bottom:1px solid rgba(47,224,200,.35);padding-bottom:2px}
.sk-related__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
.sk-media{display:flex;flex-direction:column;overflow:hidden;border-radius:var(--sk-radius-lg);border:1px solid var(--sk-line);background:var(--sk-surface);transition:transform .2s var(--sk-ease),border-color .2s var(--sk-ease)}
.sk-media:hover{transform:translateY(-4px);border-color:rgba(62,107,255,.45)}
.sk-media__img{aspect-ratio:16/10;background:linear-gradient(135deg,#0C1330,#060915)}
.sk-media__img img{width:100%;height:100%;object-fit:cover}
.sk-media__box{padding:20px 22px 22px}
.sk-media__box h3{font-size:18px;font-weight:600;color:#fff;margin-bottom:10px}
.sk-media__box p{font-size:14px;color:var(--sk-text-2);line-height:1.8}
.sk-media__foot{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:13.5px;color:var(--sk-accent)}
.sk-media__foot svg{width:16px;height:16px;fill:none;stroke:var(--sk-accent);stroke-width:1.8;transition:transform .2s var(--sk-ease)}
.sk-media:hover .sk-media__foot svg{transform:translateX(4px)}

/* ---------- CTA ---------- */
.sk-cta{padding:0 0 96px}
.sk-cta__inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:center;padding:48px;border-radius:24px;background:linear-gradient(120deg,rgba(62,107,255,.18),rgba(47,224,200,.08)),#0A1024;border:1px solid var(--sk-line)}
.sk-cta__inner h2{font-size:26px;font-weight:700;color:#fff;margin-bottom:12px}
.sk-cta__inner p{font-size:14.5px;color:var(--sk-text-2);line-height:1.85}
.sk-form{display:flex;gap:12px}
.sk-form input{flex:1 1 auto;min-width:0;height:48px;padding:0 18px;border-radius:var(--sk-radius-sm);border:1px solid var(--sk-line);background:rgba(6,9,21,.6);color:#fff;outline:none;transition:border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease)}
.sk-form input::placeholder{color:var(--sk-text-3)}
.sk-form input:focus{border-color:var(--sk-primary);box-shadow:0 0 0 3px rgba(62,107,255,.2)}
.sk-form .sk-btn{min-width:150px}
.sk-cta__note{margin-top:12px;font-size:12.5px;color:var(--sk-text-3)}

/* ---------- footer ---------- */
.sk-footer{background:var(--sk-bg-800);border-top:1px solid rgba(255,255,255,.08);padding-top:64px}
.sk-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:48px}
.sk-footer__brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:#fff;margin-bottom:16px}
.sk-footer__brand svg{width:22px;height:22px;fill:none}
.sk-footer__text{font-size:14px;color:#A8B2CC;line-height:1.9;margin-bottom:10px}
.sk-footer h4{font-size:14px;font-weight:600;color:#9DB6FF;margin-bottom:16px}
.sk-footer__list{display:grid;gap:4px}
.sk-footer__list a{display:inline-block;font-size:14px;color:#A8B2CC;line-height:1.9;transition:color .2s var(--sk-ease),text-underline-offset .2s var(--sk-ease)}
.sk-footer__list a:hover{color:var(--sk-accent);text-decoration:underline;text-underline-offset:3px}
.sk-footer__list+.sk-btn{margin-top:14px}
.sk-footer__bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:22px 0 30px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#6C7793}
.sk-footer__bottom a{color:#8794B4}
.sk-footer__bottom a:hover{color:var(--sk-accent)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .sk-layout{grid-template-columns:minmax(0,1fr) 300px;gap:36px}
  .sk-related__grid{gap:22px}
}
@media (max-width:1023px){
  .sk-nav{height:56px;gap:16px}
  .sk-menu{display:none}
  .sk-search{display:none}
  .sk-nav-toggle{display:flex}
  .sk-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .sk-side{position:static}
  .sk-cta__inner{grid-template-columns:minmax(0,1fr);padding:36px}
  .sk-related__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sk-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .sk-body{padding:36px 0 64px}
  .sk-article-hero{padding:24px 0 30px}
  .sk-prose{font-size:16px}
  .sk-prose h2{font-size:22px;margin:36px 0 14px}
  .sk-prose h3{font-size:19px}
  .sk-related{padding-bottom:68px}
  .sk-related__grid{grid-template-columns:minmax(0,1fr)}
  .sk-cta{padding-bottom:72px}
  .sk-form{flex-direction:column}
  .sk-form .sk-btn{width:100%}
  .sk-footer{padding-top:44px}
  .sk-footer__grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:32px}
  .sk-footer__bottom{flex-direction:column;align-items:flex-start;text-align:left}
  .sk-section__head h2{font-size:23px}
}
@media (max-width:519px){
  .sk-container{padding:0 18px}
  .sk-nav__tools .sk-btn{display:none}
  .sk-mobile ul{padding:4px 18px 14px}
  .sk-crumbs__now{max-width:26ch}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* roulang page: category1 */
:root{
  --sk-bg-900:#060915;
  --sk-bg-800:#0A1024;
  --sk-bg-700:#111834;
  --sk-surface:rgba(255,255,255,.055);
  --sk-surface-2:rgba(255,255,255,.09);
  --sk-line:rgba(255,255,255,.12);
  --sk-primary:#3E6BFF;
  --sk-primary-600:#2A4CE0;
  --sk-primary-soft:rgba(62,107,255,.14);
  --sk-accent:#2FE0C8;
  --sk-gold:#FFC96B;
  --sk-text:#EAEEFB;
  --sk-text-2:#A8B2CC;
  --sk-text-3:#6C7793;
  --sk-nav-bg:#FFFFFF;
  --sk-nav-line:#E6E9F2;
  --sk-nav-text:#1B2237;
  --sk-nav-soft:#F2F4FA;
  --sk-ok:#38D39F;
  --sk-warn:#FFB454;
  --sk-err:#FF6B6B;
  --sk-radius-sm:10px;
  --sk-radius-md:14px;
  --sk-radius-lg:18px;
  --sk-radius-xl:24px;
  --sk-shadow-glow:0 10px 28px rgba(62,107,255,.38);
  --sk-shadow-soft:0 6px 20px rgba(16,24,54,.08);
  --sk-grad:linear-gradient(135deg,#3E6BFF 0%,#6C4CFF 100%);
  --sk-ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  background:var(--sk-bg-900);
  color:var(--sk-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;background-color:transparent;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--sk-primary);outline-offset:2px;border-radius:4px;}

.sk-visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
}

.sk-skip{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:999;
  padding:12px 20px;
  background:var(--sk-primary);
  color:#fff;
  border-radius:0 0 12px 0;
  font-size:14px;
}
.sk-skip:focus{left:0;}

.sk-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 顶部导航 ============ */
.sk-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--sk-nav-bg);
  border-bottom:1px solid var(--sk-nav-line);
  box-shadow:0 2px 10px rgba(17,24,52,.05);
  transition:box-shadow .2s var(--sk-ease);
}
.sk-header.is-scrolled{box-shadow:0 6px 18px rgba(17,24,52,.10);}

.sk-nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}

.sk-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:16px;
  font-weight:600;
  color:var(--sk-nav-text);
  letter-spacing:0;
  white-space:nowrap;
}
.sk-brand svg{width:22px;height:22px;flex:0 0 auto;}

.sk-menu{
  display:flex;
  align-items:center;
  gap:30px;
  margin:0;
}
.sk-menu li{list-style:none;}
.sk-menu a{
  position:relative;
  display:inline-block;
  padding:20px 0;
  font-size:15px;
  font-weight:500;
  color:#40496A;
  transition:color .2s var(--sk-ease);
}
.sk-menu a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--sk-primary);
  opacity:0;
  transform:scaleX(.6);
  transition:opacity .2s var(--sk-ease),transform .2s var(--sk-ease);
}
.sk-menu a:hover{color:var(--sk-primary);}
.sk-menu a:hover::after{opacity:.4;transform:scaleX(1);}
.sk-menu a.is-active{color:var(--sk-primary);}
.sk-menu a.is-active::after{opacity:1;transform:scaleX(1);}

.sk-nav__tools{display:flex;align-items:center;gap:14px;}

.sk-search{
  position:relative;
  display:flex;
  align-items:center;
  height:40px;
  width:210px;
  padding:0 14px;
  border-radius:999px;
  background:var(--sk-nav-soft);
  border:1px solid transparent;
  transition:background .2s var(--sk-ease),border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease);
}
.sk-search svg{
  width:16px;height:16px;
  flex:0 0 auto;
  margin-right:8px;
  fill:none;
  stroke:#8A93AB;
  stroke-width:1.6;
  stroke-linecap:round;
}
.sk-search input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  font-size:14px;
  color:var(--sk-nav-text);
  outline:none;
}
.sk-search input::placeholder{color:#8A93AB;}
.sk-search:focus-within{
  background:#fff;
  border-color:var(--sk-primary);
  box-shadow:0 0 0 3px rgba(62,107,255,.18);
}

.sk-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:transform .2s var(--sk-ease),box-shadow .2s var(--sk-ease),background-color .2s var(--sk-ease),border-color .2s var(--sk-ease),color .2s var(--sk-ease);
}
.sk-btn--sm{min-height:40px;padding:0 20px;font-size:14px;}
.sk-btn--primary{
  color:#fff;
  background:var(--sk-grad);
  box-shadow:var(--sk-shadow-glow);
}
.sk-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(62,107,255,.46);}
.sk-btn--primary:active{transform:translateY(0);}
.sk-btn--ghost{
  color:var(--sk-text);
  background:transparent;
  border:1px solid var(--sk-line);
}
.sk-btn--ghost:hover{
  transform:translateY(-2px);
  border-color:rgba(62,107,255,.6);
  color:#fff;
  background:var(--sk-surface);
}
.sk-btn--ghost:active{transform:translateY(0);}

.sk-nav-toggle{
  display:none;
  width:44px;height:44px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border-radius:12px;
}
.sk-nav-toggle span{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:var(--sk-nav-text);
  transition:transform .2s var(--sk-ease),opacity .2s var(--sk-ease);
}
.sk-nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.sk-nav-toggle.is-open span:nth-child(2){opacity:0;}
.sk-nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.sk-mobile{
  display:none;
  background:#fff;
  border-top:1px solid var(--sk-nav-line);
}
.sk-mobile.is-open{display:block;}
.sk-mobile ul{margin:0;padding:0;}
.sk-mobile li{list-style:none;border-bottom:1px solid var(--sk-nav-line);}
.sk-mobile a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 24px;
  font-size:14px;
  font-weight:500;
  color:#40496A;
}
.sk-mobile a.is-active{color:var(--sk-primary);}

/* ============ 面包屑 ============ */
.sk-crumb{
  background:var(--sk-bg-900);
  padding-top:22px;
  font-size:13px;
  color:var(--sk-text-3);
}
.sk-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.sk-crumb li{list-style:none;}
.sk-crumb a{color:var(--sk-text-2);transition:color .2s var(--sk-ease);}
.sk-crumb a:hover{color:var(--sk-accent);}
.sk-crumb .sk-crumb__sep{color:rgba(255,255,255,.24);}
.sk-crumb .sk-crumb__now{color:var(--sk-text);}

/* ============ 页头 ============ */
.sk-hero{
  position:relative;
  overflow:hidden;
  background:var(--sk-bg-900);
  padding:34px 0 56px;
  border-bottom:1px solid var(--sk-line);
}
.sk-hero__bg{
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.16;
  pointer-events:none;
}
.sk-hero__glow{
  position:absolute;
  right:-140px;
  top:-160px;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(62,107,255,.42) 0%,rgba(62,107,255,0) 68%);
  pointer-events:none;
}
.sk-hero__inner{position:relative;z-index:1;max-width:820px;}

.sk-hero__tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 14px;
  margin-bottom:18px;
  border-radius:999px;
  background:var(--sk-primary-soft);
  border:1px solid rgba(62,107,255,.28);
  color:#9DB6FF;
  font-size:12px;
  font-weight:500;
  letter-spacing:.02em;
}

.sk-hero h1{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:0;
}
.sk-hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#3E6BFF 0%,#2FE0C8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.sk-hero__lead{
  margin-top:16px;
  max-width:660px;
  font-size:16px;
  color:var(--sk-text-2);
}

.sk-hero__metrics{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
.sk-hero__metrics li{
  list-style:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 15px;
  border-radius:999px;
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  font-size:13px;
  color:var(--sk-text-2);
  font-variant-numeric:tabular-nums;
}
.sk-hero__metrics li strong{
  color:var(--sk-gold);
  font-weight:700;
}
.sk-hero__metrics svg{width:15px;height:15px;fill:none;stroke:var(--sk-accent);stroke-width:1.6;}

/* ============ 正文骨架 ============ */
.sk-main{background:var(--sk-bg-900);padding:64px 0 88px;}
.sk-row{margin-left:-16px;margin-right:-16px;}
.sk-row .columns{padding-left:16px;padding-right:16px;}

/* ============ 目录 ============ */
.sk-toc{
  position:sticky;
  top:96px;
  padding:22px 20px;
  border-radius:var(--sk-radius-lg);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
}
.sk-toc__title{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--sk-accent);
  margin-bottom:14px;
}
.sk-toc ol{display:flex;flex-direction:column;gap:2px;}
.sk-toc li{list-style:none;}
.sk-toc a{
  position:relative;
  display:block;
  padding:9px 10px 9px 14px;
  border-radius:8px;
  font-size:14px;
  line-height:1.5;
  color:var(--sk-text-2);
  transition:color .2s var(--sk-ease),background-color .2s var(--sk-ease);
}
.sk-toc a::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:2px;height:0;
  border-radius:2px;
  background:var(--sk-primary);
  transform:translateY(-50%);
  transition:height .2s var(--sk-ease);
}
.sk-toc a:hover{color:#fff;background:rgba(255,255,255,.05);}
.sk-toc a.is-current{color:var(--sk-accent);background:rgba(47,224,200,.08);}
.sk-toc a.is-current::before{height:60%;background:var(--sk-accent);}

/* ============ 文章排版 ============ */
.sk-doc__intro{
  padding:22px 24px;
  border-radius:var(--sk-radius-md);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  border-left:3px solid var(--sk-primary);
  font-size:16px;
  color:var(--sk-text-2);
  line-height:1.9;
}
.sk-doc__intro strong{color:var(--sk-text);font-weight:600;}

.sk-section{
  margin-top:52px;
  scroll-margin-top:104px;
}
.sk-section > h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.35;
  font-weight:700;
  letter-spacing:0;
}
.sk-section > h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:4px;
  height:calc(100% - 12px);
  border-radius:4px;
  background:var(--sk-grad);
}
.sk-section p{
  margin-top:18px;
  font-size:16.5px;
  line-height:1.9;
  color:var(--sk-text-2);
}

.sk-points{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:22px;
}
.sk-points li{
  position:relative;
  list-style:none;
  padding-left:24px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--sk-text);
}
.sk-points li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--sk-primary);
  box-shadow:0 0 0 3px rgba(62,107,255,.16);
}

.sk-figure{
  margin:34px 0 0;
  border-radius:var(--sk-radius-lg);
  overflow:hidden;
  border:1px solid var(--sk-line);
  background:linear-gradient(140deg,#111834 0%,#060915 100%);
}
.sk-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.sk-figure figcaption{
  padding:12px 18px;
  font-size:13px;
  color:var(--sk-text-3);
  border-top:1px solid var(--sk-line);
}

.sk-quote{
  margin-top:26px;
  padding:20px 22px;
  border-radius:var(--sk-radius-md);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  border-left:3px solid var(--sk-accent);
  font-size:15.5px;
  line-height:1.85;
  color:var(--sk-text);
}

.sk-steps{
  counter-reset:skstep;
  display:flex;
  flex-direction:column;
  gap:14px;
  margin-top:24px;
}
.sk-steps li{
  counter-increment:skstep;
  position:relative;
  list-style:none;
  padding:16px 20px 16px 62px;
  border-radius:var(--sk-radius-md);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  font-size:15.5px;
  line-height:1.8;
  color:var(--sk-text-2);
  transition:border-color .2s var(--sk-ease),transform .2s var(--sk-ease);
}
.sk-steps li:hover{border-color:rgba(62,107,255,.42);transform:translateX(3px);}
.sk-steps li::before{
  content:counter(skstep,decimal-leading-zero);
  position:absolute;
  left:18px;top:50%;
  transform:translateY(-50%);
  font-size:18px;
  font-weight:700;
  color:var(--sk-primary);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.sk-steps li strong{color:var(--sk-text);font-weight:600;}

/* ============ 场景卡 ============ */
.sk-scenes{
  margin-top:72px;
  padding-top:56px;
  border-top:1px solid var(--sk-line);
  scroll-margin-top:104px;
}
.sk-scenes__head h2{
  font-size:clamp(20px,2.2vw,26px);
  font-weight:700;
}
.sk-scenes__head p{
  margin-top:12px;
  font-size:15px;
  color:var(--sk-text-2);
}
.sk-scenes__grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  margin-top:30px;
}
.sk-card--media{
  display:flex;
  flex-direction:column;
  overflow:hidden;
  border-radius:var(--sk-radius-lg);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  transition:transform .24s var(--sk-ease),border-color .24s var(--sk-ease),box-shadow .24s var(--sk-ease);
}
.sk-card--media:hover{
  transform:translateY(-4px);
  border-color:rgba(62,107,255,.42);
  box-shadow:0 16px 34px rgba(6,9,21,.55);
}
.sk-card--media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.sk-card__body{padding:20px 20px 22px;}
.sk-card__badge{
  display:inline-block;
  padding:4px 12px;
  border-radius:999px;
  background:var(--sk-primary-soft);
  color:#9DB6FF;
  font-size:12px;
  font-weight:500;
}
.sk-card__title{
  margin-top:12px;
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  color:var(--sk-text);
}
.sk-card__text{
  margin-top:10px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--sk-text-2);
}
.sk-card__chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}
.sk-chip{
  padding:4px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--sk-line);
  color:var(--sk-text-3);
  font-size:12px;
}

/* ============ FAQ ============ */
.sk-faq{
  margin-top:72px;
  padding-top:56px;
  border-top:1px solid var(--sk-line);
  scroll-margin-top:104px;
}
.sk-faq h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;}
.sk-faq__lead{margin-top:12px;font-size:15px;color:var(--sk-text-2);}
.sk-faq__list{display:flex;flex-direction:column;gap:12px;margin-top:28px;}
.sk-faq__item{
  border-radius:var(--sk-radius-md);
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  overflow:hidden;
  transition:border-color .2s var(--sk-ease);
}
.sk-faq__item[open]{border-color:rgba(62,107,255,.42);}
.sk-faq__item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  font-size:17px;
  font-weight:500;
  color:var(--sk-text);
  cursor:pointer;
  list-style:none;
}
.sk-faq__item summary::-webkit-details-marker{display:none;}
.sk-faq__icon{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  transition:transform .2s var(--sk-ease);
}
.sk-faq__icon::before,
.sk-faq__icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--sk-accent);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.sk-faq__icon::before{width:12px;height:2px;}
.sk-faq__icon::after{width:2px;height:12px;}
.sk-faq__item[open] .sk-faq__icon{transform:rotate(45deg);}
.sk-faq__answer{
  padding:0 20px 20px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--sk-text-2);
}

/* ============ CTA ============ */
.sk-cta{
  margin-top:72px;
  padding:48px;
  border-radius:var(--sk-radius-xl);
  background:linear-gradient(120deg,rgba(62,107,255,.14) 0%,rgba(47,224,200,.08) 100%),#0A1024;
  border:1px solid var(--sk-line);
  box-shadow:0 18px 44px rgba(6,9,21,.5);
  scroll-margin-top:104px;
}
.sk-cta__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.sk-cta h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;}
.sk-cta p{margin-top:10px;max-width:620px;font-size:15px;line-height:1.8;color:var(--sk-text-2);}
.sk-cta__actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 页脚 ============ */
.sk-footer{
  background:var(--sk-bg-800);
  border-top:1px solid var(--sk-line);
  padding-top:64px;
  margin-top:0;
}
.sk-footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.sk-footer h4{
  font-size:14px;
  font-weight:600;
  color:var(--sk-primary);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.sk-footer__brand{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:16px;
  font-weight:600;
  color:var(--sk-text);
  margin-bottom:14px;
}
.sk-footer__brand svg{width:20px;height:20px;fill:none;}
.sk-footer__text{
  font-size:14px;
  line-height:1.9;
  color:var(--sk-text-2);
  margin-bottom:10px;
}
.sk-footer__list{display:flex;flex-direction:column;gap:6px;}
.sk-footer__list a{
  font-size:14px;
  line-height:1.9;
  color:var(--sk-text-2);
  text-underline-offset:3px;
  transition:color .2s var(--sk-ease);
  width:fit-content;
}
.sk-footer__list a:hover{color:var(--sk-accent);text-decoration:underline;}
.sk-footer__bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:48px;
  padding:22px 0 28px;
  border-top:1px solid var(--sk-line);
  font-size:13px;
  color:var(--sk-text-3);
}
.sk-footer__bottom a{color:var(--sk-text-3);transition:color .2s var(--sk-ease);}
.sk-footer__bottom a:hover{color:var(--sk-accent);}

/* ============ 响应式 ============ */
@media screen and (max-width:1199px){
  .sk-container{max-width:960px;}
  .sk-menu{gap:22px;}
  .sk-search{width:180px;}
}

@media screen and (max-width:1023px){
  .sk-menu{display:none;}
  .sk-nav-toggle{display:flex;}
  .sk-nav__tools .sk-btn--sm{display:none;}
  .sk-main{padding:48px 0 64px;}
  .sk-toc{
    position:static;
    padding:16px;
    margin-bottom:32px;
  }
  .sk-toc ol{
    flex-direction:row;
    flex-wrap:nowrap;
    overflow-x:auto;
    gap:8px;
    padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
  }
  .sk-toc li{flex:0 0 auto;}
  .sk-toc a{
    padding:8px 14px;
    white-space:nowrap;
    border:1px solid var(--sk-line);
    border-radius:999px;
  }
  .sk-toc a::before{display:none;}
  .sk-scenes__grid{grid-template-columns:1fr 1fr;}
  .sk-footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .sk-cta{padding:36px 28px;}
}

@media screen and (max-width:767px){
  .sk-nav{height:56px;}
  .sk-brand{font-size:15px;}
  .sk-search{display:none;}
  .sk-hero{padding:26px 0 44px;}
  .sk-hero__glow{width:320px;height:320px;right:-120px;top:-120px;}
  .sk-main{padding:40px 0 56px;}
  .sk-section{margin-top:40px;}
  .sk-section p{font-size:16px;}
  .sk-scenes__grid{grid-template-columns:1fr;}
  .sk-scenes{margin-top:56px;padding-top:44px;}
  .sk-faq{margin-top:56px;padding-top:44px;}
  .sk-cta{margin-top:56px;padding:28px 22px;}
  .sk-cta__inner{flex-direction:column;align-items:flex-start;}
  .sk-cta__actions{width:100%;}
  .sk-cta__actions .sk-btn{flex:1 1 auto;}
  .sk-footer{padding-top:44px;}
  .sk-footer__grid{grid-template-columns:1fr;gap:28px;}
  .sk-footer__bottom{flex-direction:column;align-items:center;text-align:center;}
  .sk-doc__intro{padding:18px;}
}

@media screen and (max-width:519px){
  .sk-container{padding-left:18px;padding-right:18px;}
  .sk-row{margin-left:-8px;margin-right:-8px;}
  .sk-row .columns{padding-left:8px;padding-right:8px;}
  .sk-hero h1{font-size:26px;}
  .sk-hero__metrics{gap:8px;}
  .sk-hero__metrics li{font-size:12px;padding:6px 12px;}
  .sk-steps li{padding:14px 16px 14px 54px;}
  .sk-steps li::before{left:14px;font-size:16px;}
  .sk-faq__item summary{font-size:16px;padding:16px;}
  .sk-footer__bottom{font-size:12.5px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
}

/* roulang page: category2 */
:root{
  --sk-bg-900:#060915;
  --sk-bg-800:#0A1024;
  --sk-bg-700:#111834;
  --sk-surface:rgba(255,255,255,.055);
  --sk-surface-2:rgba(255,255,255,.09);
  --sk-line:rgba(255,255,255,.12);
  --sk-primary:#3E6BFF;
  --sk-primary-600:#2A4CE0;
  --sk-primary-soft:rgba(62,107,255,.14);
  --sk-accent:#2FE0C8;
  --sk-gold:#FFC96B;
  --sk-text:#EAEEFB;
  --sk-text-2:#A8B2CC;
  --sk-text-3:#6C7793;
  --sk-nav-bg:#FFFFFF;
  --sk-nav-line:#E6E9F2;
  --sk-nav-text:#1B2237;
  --sk-nav-soft:#F2F4FA;
  --sk-radius-xl:24px;
  --sk-radius-lg:18px;
  --sk-radius-md:14px;
  --sk-radius-sm:10px;
  --sk-shadow-glow:0 10px 28px rgba(62,107,255,.38);
  --sk-shadow-soft:0 6px 20px rgba(16,24,54,.08);
  --sk-ease:cubic-bezier(.22,.61,.36,1);
  --sk-max:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--sk-text);
  background:var(--sk-bg-900);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--sk-primary);outline-offset:3px;border-radius:4px}

.sk-visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sk-skip{
  position:absolute;left:16px;top:-60px;z-index:200;
  background:var(--sk-primary);color:#fff;padding:10px 18px;border-radius:var(--sk-radius-sm);
  font-size:14px;transition:top .2s var(--sk-ease);
}
.sk-skip:focus{top:12px}

/* ---------- 容器 ---------- */
.sk-container{
  width:100%;
  max-width:var(--sk-max);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 顶部导航 ---------- */
.sk-header{
  position:sticky;top:0;z-index:120;
  background:var(--sk-nav-bg);
  border-bottom:1px solid var(--sk-nav-line);
  box-shadow:0 2px 10px rgba(17,24,52,.05);
  transition:box-shadow .2s var(--sk-ease);
}
.sk-header.is-scrolled{box-shadow:0 6px 18px rgba(17,24,52,.10)}
.sk-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.sk-brand{display:inline-flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:var(--sk-nav-text);white-space:nowrap}
.sk-brand svg{width:20px;height:20px;flex:0 0 auto}
.sk-menu{display:flex;align-items:center;gap:30px}
.sk-menu a{
  position:relative;display:inline-block;padding:21px 0;
  font-size:15px;font-weight:500;color:#4A5268;
  transition:color .2s var(--sk-ease);
}
.sk-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--sk-primary);border-radius:2px;opacity:0;transform:scaleX(.6);
  transition:opacity .2s var(--sk-ease),transform .2s var(--sk-ease);
}
.sk-menu a:hover{color:var(--sk-primary)}
.sk-menu a:hover::after{opacity:.4;transform:scaleX(1)}
.sk-menu a.is-active{color:var(--sk-primary)}
.sk-menu a.is-active::after{opacity:1;transform:scaleX(1)}

.sk-nav__tools{display:flex;align-items:center;gap:14px}
.sk-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;border-radius:999px;
  background:var(--sk-nav-soft);border:1px solid transparent;
  transition:background .2s var(--sk-ease),border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease);
}
.sk-search svg{width:17px;height:17px;fill:none;stroke:#8A93AB;stroke-width:1.7;stroke-linecap:round;flex:0 0 auto}
.sk-search input{
  width:150px;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--sk-nav-text);
}
.sk-search input::placeholder{color:#8A93AB}
.sk-search:focus-within{background:#fff;border-color:var(--sk-primary);box-shadow:0 0 0 3px rgba(62,107,255,.18)}
.sk-nav-toggle{
  display:none;width:44px;height:44px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.sk-nav-toggle span{display:block;width:20px;height:1.8px;background:var(--sk-nav-text);border-radius:2px;transition:transform .2s var(--sk-ease),opacity .2s var(--sk-ease)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.8px) rotate(45deg)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.8px) rotate(-45deg)}

.sk-mobile{display:none;background:#fff;border-top:1px solid var(--sk-nav-line)}
.sk-mobile.is-open{display:block}
.sk-mobile ul{padding:6px 0 14px}
.sk-mobile li{border-bottom:1px solid var(--sk-nav-line)}
.sk-mobile li:last-child{border-bottom:0}
.sk-mobile a{display:flex;align-items:center;min-height:48px;padding:0 24px;font-size:14px;font-weight:500;color:#2B3category}
.sk-mobile a{color:#2B3348}
.sk-mobile a.is-active{color:var(--sk-primary)}

/* ---------- 按钮 ---------- */
.sk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 22px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .2s var(--sk-ease),box-shadow .2s var(--sk-ease),background .2s var(--sk-ease),border-color .2s var(--sk-ease),color .2s var(--sk-ease);
}
.sk-btn--sm{height:36px;padding:0 16px;font-size:13.5px}
.sk-btn--primary{
  background:linear-gradient(135deg,#3E6BFF 0%,#6C4CFF 100%);
  color:#fff;box-shadow:var(--sk-shadow-glow);
}
.sk-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(62,107,255,.46)}
.sk-btn--primary:active{transform:translateY(0)}
.sk-btn--ghost{background:transparent;border-color:var(--sk-line);color:var(--sk-text)}
.sk-btn--ghost:hover{border-color:rgba(62,107,255,.55);color:#BFD0FF;transform:translateY(-2px)}
.sk-btn--ghost-nav{background:transparent;border-color:var(--sk-nav-line);color:var(--sk-nav-text)}

/* ---------- 通用板块 ---------- */
.sk-main{display:block}
.sk-section{padding:88px 0}
.sk-section--tight{padding-top:56px}
.sk-section__head{margin-bottom:32px}
.sk-section__head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px}
.sk-h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:0}
.sk-h2 em{font-style:normal;color:var(--sk-accent)}
.sk-lead{color:var(--sk-text-2);font-size:15.5px;margin-top:12px;max-width:720px}
.sk-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--sk-accent);
  letter-spacing:.06em;margin-bottom:14px;
}
.sk-eyebrow::before{content:"";width:18px;height:1px;background:var(--sk-accent);opacity:.7}

/* ---------- 面包屑 ---------- */
.sk-crumb{padding:24px 0 4px;font-size:13px;color:var(--sk-text-3)}
.sk-crumb a{color:var(--sk-text-3);transition:color .2s var(--sk-ease)}
.sk-crumb a:hover{color:var(--sk-primary)}
.sk-crumb span[aria-current]{color:var(--sk-text-2)}
.sk-crumb .sk-sep{margin:0 8px;color:#3C4761}

/* ---------- 页头窄条 ---------- */
.sk-pagehead{
  position:relative;overflow:hidden;
  margin-top:16px;
  border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-xl);
  min-height:250px;
  display:flex;align-items:center;
  padding:48px;
}
.sk-pagehead::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.18;
}
.sk-pagehead::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(105deg,rgba(6,9,21,.94) 0%,rgba(10,16,36,.78) 55%,rgba(17,24,52,.58) 100%);
}
.sk-pagehead__inner{position:relative;z-index:2;max-width:760px}
.sk-pagehead h1{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.28;font-weight:700;letter-spacing:0;
}
.sk-pagehead h1 em{font-style:normal;background:linear-gradient(135deg,#7FA0FF,#2FE0C8);-webkit-background-clip:text;background-clip:text;color:transparent}
.sk-pagehead__sub{margin-top:14px;color:var(--sk-text-2);font-size:15.5px;max-width:620px}
.sk-metrics{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.sk-metric{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;
  background:var(--sk-surface-2);border:1px solid var(--sk-line);
  font-size:13px;color:var(--sk-text-2);
}
.sk-metric i{width:6px;height:6px;border-radius:50%;background:var(--sk-accent);display:block;box-shadow:0 0 0 4px rgba(47,224,200,.16)}

/* ---------- 卡片集 ---------- */
.sk-cards{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:32px;
}
.sk-card{
  position:relative;
  background:var(--sk-surface);
  border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-lg);
  overflow:hidden;
  transition:transform .24s var(--sk-ease),border-color .24s var(--sk-ease),box-shadow .24s var(--sk-ease);
}
.sk-card:hover{transform:translateY(-4px);border-color:rgba(62,107,255,.4);box-shadow:0 18px 40px rgba(6,9,21,.5)}
.sk-cards > .sk-card:nth-child(even){margin-top:32px}
.sk-card__media{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  background:linear-gradient(135deg,#111834 0%,#0A1024 100%);
}
.sk-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--sk-ease)}
.sk-card:hover .sk-card__media img{transform:scale(1.035)}
.sk-card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,9,21,.15) 0%,rgba(6,9,21,.55) 100%);
}
.sk-card__num{
  position:absolute;top:14px;left:16px;z-index:2;
  padding:6px 12px;border-radius:var(--sk-radius-md);
  background:rgba(6,9,21,.62);
  border:1px solid rgba(62,107,255,.35);
  font-size:26px;line-height:1;font-weight:700;letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
  color:#7D9BFF;
  text-shadow:0 0 18px rgba(62,107,255,.55);
}
.sk-card__body{padding:24px 24px 26px}
.sk-card__title{font-size:19px;font-weight:600;line-height:1.45}
.sk-card__text{margin-top:10px;font-size:15px;line-height:1.8;color:var(--sk-text-2)}
.sk-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.sk-chip{
  display:inline-block;padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.07);
  font-size:12px;color:var(--sk-text-2);
}

/* ---------- 对照表 ---------- */
.sk-table-wrap{
  overflow-x:auto;
  border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-lg);
  background:var(--sk-surface);
  -webkit-overflow-scrolling:touch;
}
.sk-table{min-width:660px;font-size:15px}
.sk-table th{
  background:rgba(62,107,255,.08);
  color:var(--sk-text);
  font-weight:600;font-size:14px;text-align:left;
  padding:16px 20px;
  border-bottom:1px solid var(--sk-line);
  white-space:nowrap;
}
.sk-table td{
  padding:16px 20px;
  height:52px;
  color:var(--sk-text-2);
  border-bottom:1px solid rgba(255,255,255,.07);
  vertical-align:middle;
}
.sk-table tbody tr:last-child td{border-bottom:0}
.sk-table tbody tr:hover td{background:rgba(255,255,255,.03)}
.sk-table td strong{color:var(--sk-text);font-weight:600}

/* ---------- FAQ ---------- */
.sk-faq{max-width:920px}
.sk-faq__item{
  border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-md);
  background:var(--sk-surface);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s var(--sk-ease),background .2s var(--sk-ease);
}
.sk-faq__item:hover{border-color:rgba(62,107,255,.35)}
.sk-faq__item[open]{background:var(--sk-surface-2)}
.sk-faq__item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:17px 20px;
  font-size:17px;font-weight:500;
  transition:color .2s var(--sk-ease);
}
.sk-faq__item summary::-webkit-details-marker{display:none}
.sk-faq__item summary:hover{color:#BFD0FF}
.sk-faq__item summary::after{
  content:"";flex:0 0 auto;width:10px;height:10px;
  border-right:1.6px solid var(--sk-accent);
  border-bottom:1.6px solid var(--sk-accent);
  transform:rotate(45deg);
  transition:transform .22s var(--sk-ease);
  margin-right:4px;
}
.sk-faq__item[open] summary::after{transform:rotate(-135deg)}
.sk-faq__item p{padding:0 20px 18px;color:var(--sk-text-2);font-size:15px;line-height:1.85}

/* ---------- CTA ---------- */
.sk-cta{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:48px;
  border:1px solid var(--sk-line);
  border-radius:var(--sk-radius-xl);
  background:linear-gradient(120deg,rgba(62,107,255,.14) 0%,rgba(47,224,200,.08) 100%),var(--sk-bg-800);
}
.sk-cta::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(62,107,255,.28) 0%,rgba(62,107,255,0) 70%);
  pointer-events:none;
}
.sk-cta__text{position:relative;z-index:1;max-width:640px}
.sk-cta__text h2{font-size:clamp(20px,2.3vw,27px);line-height:1.35;font-weight:700}
.sk-cta__text p{margin-top:12px;color:var(--sk-text-2);font-size:15px}
.sk-cta__actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.sk-footer{
  margin-top:88px;
  background:var(--sk-bg-900);
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:64px;
}
.sk-footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.sk-footer h4{font-size:14px;font-weight:600;color:var(--sk-primary);margin-bottom:16px}
.sk-footer__brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:var(--sk-text);margin-bottom:14px}
.sk-footer__brand svg{width:20px;height:20px;flex:0 0 auto}
.sk-footer__text{font-size:14px;color:var(--sk-text-2);line-height:1.9;margin-bottom:10px}
.sk-footer__list{display:flex;flex-direction:column}
.sk-footer__list a{
  font-size:14px;color:#A8B2CC;line-height:1.9;padding:4px 0;
  transition:color .2s var(--sk-ease),text-underline-offset .2s var(--sk-ease);
}
.sk-footer__list a:hover{color:var(--sk-primary);text-decoration:underline;text-underline-offset:3px}
.sk-footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:56px;padding:22px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:var(--sk-text-3);
}
.sk-footer__bottom a{color:#8C97B4}
.sk-footer__bottom a:hover{color:var(--sk-primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .sk-menu{gap:22px}
}
@media (max-width:1023px){
  .sk-section{padding:64px 0}
  .sk-section--tight{padding-top:44px}
  .sk-cards{gap:24px}
  .sk-cards > .sk-card:nth-child(even){margin-top:24px}
  .sk-search input{width:118px}
  .sk-footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .sk-cta{padding:40px}
  .sk-pagehead{padding:40px}
}
@media (max-width:767px){
  .sk-menu{display:none}
  .sk-search{display:none}
  .sk-nav-toggle{display:flex}
  .sk-nav{height:56px;gap:12px}
  .sk-header .sk-btn--sm{display:none}
  .sk-cards{grid-template-columns:minmax(0,1fr);gap:20px}
  .sk-cards > .sk-card:nth-child(even){margin-top:0}
  .sk-pagehead{padding:32px 24px;min-height:220px}
  .sk-section__head--row{flex-direction:column;align-items:flex-start;gap:14px}
  .sk-cta{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:24px}
  .sk-cta__actions{width:100%}
  .sk-cta__actions .sk-btn{flex:1 1 auto}
  .sk-footer{margin-top:56px;padding-top:40px}
  .sk-footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .sk-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;margin-top:36px}
}
@media (max-width:479px){
  .sk-container{padding-left:18px;padding-right:18px}
  .sk-section{padding:48px 0}
  .sk-card__body{padding:20px 18px 22px}
  .sk-card__num{font-size:22px;padding:5px 10px}
  .sk-btn{height:44px}
  .sk-btn--sm{height:38px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --sk-bg-900:#060915;
  --sk-bg-800:#0A1024;
  --sk-bg-700:#111834;
  --sk-surface:rgba(255,255,255,.055);
  --sk-surface-2:rgba(255,255,255,.09);
  --sk-line:rgba(255,255,255,.12);
  --sk-primary:#3E6BFF;
  --sk-primary-600:#2A4CE0;
  --sk-primary-soft:rgba(62,107,255,.14);
  --sk-accent:#2FE0C8;
  --sk-gold:#FFC96B;
  --sk-text:#EAEEFB;
  --sk-text-2:#A8B2CC;
  --sk-text-3:#6C7793;
  --sk-nav-bg:#FFFFFF;
  --sk-nav-line:#E6E9F2;
  --sk-nav-text:#1B2237;
  --sk-nav-soft:#F2F4FA;
  --sk-success:#38D39F;
  --sk-warn:#FFB454;
  --sk-radius-lg:18px;
  --sk-radius-md:14px;
  --sk-radius-sm:10px;
  --sk-shadow-glow:0 10px 28px rgba(62,107,255,.38);
  --sk-shadow-card:0 14px 34px rgba(3,6,18,.45);
  --sk-ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--sk-bg-900);
  color:var(--sk-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--sk-primary);outline-offset:3px;border-radius:6px}
.sk-visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sk-skip{position:absolute;left:16px;top:-60px;z-index:200;padding:10px 18px;border-radius:10px;background:var(--sk-primary);color:#fff;font-size:14px;transition:top .2s var(--sk-ease)}
.sk-skip:focus{top:12px}
.grid-container.sk-container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:479px){.grid-container.sk-container{padding-left:18px;padding-right:18px}}

/* ---------- header / nav ---------- */
.sk-header{position:sticky;top:0;z-index:80;background:var(--sk-nav-bg);border-bottom:1px solid var(--sk-nav-line);box-shadow:0 2px 10px rgba(17,24,52,.05);transition:box-shadow .2s var(--sk-ease)}
.sk-header.is-scrolled{box-shadow:0 6px 18px rgba(17,24,52,.10)}
.sk-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.sk-brand{display:inline-flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:var(--sk-nav-text);white-space:nowrap}
.sk-brand svg{width:20px;height:20px;flex:none}
.sk-menu{display:flex;align-items:center;gap:30px}
.sk-menu a{position:relative;display:inline-block;padding:8px 0;font-size:14.5px;font-weight:500;color:#3A4258;transition:color .2s var(--sk-ease)}
.sk-menu a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;background:var(--sk-primary);opacity:0;transition:opacity .2s var(--sk-ease)}
.sk-menu a:hover{color:var(--sk-primary)}
.sk-menu a:hover::after{opacity:.4}
.sk-menu a.is-active{color:var(--sk-primary)}
.sk-menu a.is-active::after{opacity:1}
.sk-nav__tools{display:flex;align-items:center;gap:12px}
.sk-search{display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:999px;background:var(--sk-nav-soft);border:1px solid transparent;transition:border-color .2s var(--sk-ease),box-shadow .2s var(--sk-ease),background .2s var(--sk-ease)}
.sk-search svg{width:16px;height:16px;fill:none;stroke:#8A93AB;stroke-width:1.7;flex:none}
.sk-search input{width:148px;border:0;background:transparent;outline:none;font-size:14px;color:var(--sk-nav-text)}
.sk-search input::placeholder{color:#8A93AB}
.sk-search:focus-within{background:#fff;border-color:var(--sk-primary);box-shadow:0 0 0 3px rgba(62,107,255,.18)}
.sk-nav-toggle{display:none;width:44px;height:44px;padding:0;border:0;background:transparent;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.sk-nav-toggle span{display:block;width:22px;height:2px;border-radius:2px;background:var(--sk-nav-text);transition:transform .2s var(--sk-ease),opacity .2s var(--sk-ease)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.sk-nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.sk-mobile{display:none;background:#fff;border-top:1px solid var(--sk-nav-line);max-height:0;overflow:hidden;transition:max-height .24s var(--sk-ease)}
.sk-mobile.is-open{max-height:420px}
.sk-mobile ul{margin:0;padding:0}
.sk-mobile li{border-bottom:1px solid var(--sk-nav-line)}
.sk-mobile a{display:flex;align-items:center;min-height:48px;padding:0 24px;font-size:14px;font-weight:500;color:#3A4258}
.sk-mobile a.is-active{color:var(--sk-primary)}

/* ---------- buttons ---------- */
.sk-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:transform .2s var(--sk-ease),box-shadow .2s var(--sk-ease),border-color .2s var(--sk-ease),background .2s var(--sk-ease)}
.sk-btn--primary{background:linear-gradient(135deg,#3E6BFF 0%,#6C4CFF 100%);color:#fff;box-shadow:var(--sk-shadow-glow)}
.sk-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(62,107,255,.5)}
.sk-btn--primary:active{transform:translateY(0)}
.sk-btn--ghost{background:rgba(255,255,255,.04);border-color:var(--sk-line);color:var(--sk-text)}
.sk-btn--ghost:hover{transform:translateY(-2px);border-color:rgba(62,107,255,.55);color:#fff}
.sk-btn--sm{height:40px;padding:0 20px;font-size:14px}

/* ---------- page head ---------- */
.sk-pagehead{position:relative;overflow:hidden;background:linear-gradient(118deg,#060915 0%,#0A1024 46%,#111834 100%);padding:34px 0 60px}
.sk-pagehead::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.22) 1px,transparent 1px);background-size:28px 28px;opacity:.14;pointer-events:none}
.sk-pagehead__arc{position:absolute;right:-80px;top:-60px;width:520px;height:520px;opacity:.5;pointer-events:none}
.sk-pagehead__inner{position:relative;z-index:1;max-width:820px}
.sk-crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--sk-text-3);margin-bottom:22px;flex-wrap:wrap}
.sk-crumb a{color:var(--sk-text-2);transition:color .2s var(--sk-ease)}
.sk-crumb a:hover{color:var(--sk-accent)}
.sk-crumb span[aria-current]{color:var(--sk-text-2)}
.sk-pagehead h1{font-size:clamp(26px,3.6vw,38px);line-height:1.28;font-weight:700;letter-spacing:0}
.sk-pagehead h1 em{font-style:normal;background:linear-gradient(120deg,#3E6BFF 0%,#2FE0C8 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.sk-pagehead__lead{margin-top:16px;font-size:16px;color:var(--sk-text-2);max-width:640px}
.sk-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.sk-chip{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;background:var(--sk-primary-soft);border:1px solid rgba(62,107,255,.28);font-size:13px;color:#C6D3FF}
.sk-chip b{color:var(--sk-gold);font-variant-numeric:tabular-nums;font-weight:700}
.sk-pagehead__metric{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--sk-text-2);font-variant-numeric:tabular-nums}

/* ---------- sections ---------- */
.sk-section{padding:96px 0}
.sk-section--alt{background:var(--sk-bg-800);border-top:1px solid var(--sk-line);border-bottom:1px solid var(--sk-line)}
.sk-head{max-width:720px;margin-bottom:44px}
.sk-head__eyebrow{display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--sk-accent);margin-bottom:12px}
.sk-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700}
.sk-head p{margin-top:14px;font-size:16px;color:var(--sk-text-2)}

/* ---------- prep strip ---------- */
.sk-prep{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--sk-line);border-bottom:1px solid var(--sk-line)}
.sk-prep__item{padding:32px 28px;border-right:1px solid var(--sk-line)}
.sk-prep__item:last-child{border-right:0}
.sk-prep__num{display:block;font-size:22px;font-weight:700;color:var(--sk-primary);font-variant-numeric:tabular-nums;line-height:1}
.sk-prep__item h3{margin-top:14px;font-size:18px;font-weight:600}
.sk-prep__item p{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--sk-text-2)}

/* ---------- timeline ---------- */
.sk-tl{position:relative}
.sk-tl::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%);background:linear-gradient(180deg,rgba(62,107,255,0),rgba(62,107,255,.55) 10%,rgba(47,224,200,.42) 88%,rgba(47,224,200,0))}
.sk-tl__row{position:relative;display:grid;grid-template-columns:1fr 104px 1fr;align-items:center;margin-bottom:26px}
.sk-tl__row:last-child{margin-bottom:0}
.sk-tl__node{grid-column:2;justify-self:center;position:relative;width:14px;height:14px;border-radius:50%;background:var(--sk-primary);box-shadow:0 0 0 6px rgba(62,107,255,.16)}
.sk-tl__row:nth-child(even) .sk-tl__node{background:var(--sk-accent);box-shadow:0 0 0 6px rgba(47,224,200,.16)}
.sk-tl__card{grid-column:1;background:var(--sk-surface);border:1px solid var(--sk-line);border-radius:var(--sk-radius-lg);padding:26px 28px;transition:transform .24s var(--sk-ease),border-color .24s var(--sk-ease),box-shadow .24s var(--sk-ease)}
.sk-tl__row--right .sk-tl__card{grid-column:3}
.sk-tl__card:hover{transform:translateY(-4px);border-color:rgba(62,107,255,.45);box-shadow:var(--sk-shadow-card)}
.sk-tl__idx{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--sk-gold);font-variant-numeric:tabular-nums}
.sk-tl__card h3{margin-top:10px;font-size:20px;font-weight:600;line-height:1.45}
.sk-tl__card p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--sk-text-2)}
.sk-tl__media{margin-top:18px;border-radius:var(--sk-radius-sm);overflow:hidden;border:1px solid var(--sk-line);aspect-ratio:16/9;background:linear-gradient(140deg,#0d1430,#1a2350)}
.sk-tl__media img{width:100%;height:100%;object-fit:cover}
.sk-tl__hint{margin-top:14px;display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--sk-text-3)}
.sk-tl__hint::before{content:"";width:14px;height:1px;background:var(--sk-accent)}

/* ---------- glossary ---------- */
.sk-gloss{display:grid;grid-template-columns:1fr;border:1px solid var(--sk-line);border-radius:var(--sk-radius-lg);overflow:hidden}
.sk-gloss__row{display:grid;grid-template-columns:300px 1fr;gap:0;border-bottom:1px solid var(--sk-line);background:rgba(255,255,255,.02);transition:background .2s var(--sk-ease)}
.sk-gloss__row:last-child{border-bottom:0}
.sk-gloss__row:hover{background:rgba(255,255,255,.05)}
.sk-gloss dt{padding:22px 26px;font-size:15px;font-weight:600;color:var(--sk-text);border-right:1px solid var(--sk-line)}
.sk-gloss dd{padding:22px 26px;font-size:15px;line-height:1.85;color:var(--sk-text-2)}

/* ---------- faq ---------- */
.sk-faq-wrap{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
.sk-faq details{background:var(--sk-surface);border:1px solid var(--sk-line);border-radius:var(--sk-radius-md);margin-bottom:12px;overflow:hidden;transition:border-color .2s var(--sk-ease)}
.sk-faq details[open]{border-color:rgba(62,107,255,.45)}
.sk-faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-size:17px;font-weight:500;line-height:1.5;color:var(--sk-text);cursor:pointer;list-style:none}
.sk-faq summary::-webkit-details-marker{display:none}
.sk-faq summary::after{content:"";flex:none;width:9px;height:9px;border-right:2px solid var(--sk-accent);border-bottom:2px solid var(--sk-accent);transform:rotate(45deg);transition:transform .22s var(--sk-ease)}
.sk-faq details[open] summary::after{transform:rotate(225deg)}
.sk-faq__body{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--sk-text-2)}
.sk-sidecard{background:var(--sk-surface);border:1px solid var(--sk-line);border-radius:var(--sk-radius-lg);padding:28px;backdrop-filter:blur(6px)}
.sk-sidecard h3{font-size:19px;font-weight:600}
.sk-sidecard p{margin-top:12px;font-size:14.5px;line-height:1.85;color:var(--sk-text-2)}
.sk-sidecard ul{margin-top:18px;display:grid;gap:10px}
.sk-sidecard li{position:relative;padding-left:18px;font-size:14.5px;color:var(--sk-text-2)}
.sk-sidecard li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;background:var(--sk-primary)}
.sk-sidecard .sk-btn{margin-top:22px;width:100%}
.sk-sidecard small{display:block;margin-top:12px;font-size:12.5px;color:var(--sk-text-3);line-height:1.7}

/* ---------- cta ---------- */
.sk-cta{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:36px;padding:48px;border-radius:24px;border:1px solid var(--sk-line);background:linear-gradient(120deg,rgba(62,107,255,.17),rgba(47,224,200,.08)),var(--sk-bg-800)}
.sk-cta::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.2) 1px,transparent 1px);background-size:26px 26px;opacity:.12;pointer-events:none}
.sk-cta__text{position:relative;z-index:1;max-width:620px}
.sk-cta h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35}
.sk-cta p{margin-top:12px;font-size:15px;color:var(--sk-text-2)}
.sk-cta__actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.sk-footer{margin-top:0;background:var(--sk-bg-900);border-top:1px solid rgba(255,255,255,.16);padding:64px 0 28px}
.sk-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.sk-footer__brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;color:#fff}
.sk-footer__brand svg{width:20px;height:20px;flex:none}
.sk-footer__text{margin-top:12px;font-size:14px;line-height:1.9;color:var(--sk-text-2)}
.sk-footer h4{font-size:14px;font-weight:600;color:var(--sk-primary);margin-bottom:16px}
.sk-footer__list{display:grid;gap:0}
.sk-footer__list a{display:inline-block;padding:5px 0;font-size:14px;color:#A8B2CC;transition:color .2s var(--sk-ease),text-decoration-color .2s var(--sk-ease);text-decoration:underline;text-decoration-color:transparent;text-underline-offset:3px}
.sk-footer__list a:hover{color:var(--sk-primary);text-decoration-color:var(--sk-primary)}
.sk-footer__bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:var(--sk-text-3)}
.sk-footer__bottom a{color:var(--sk-text-3)}
.sk-footer__bottom a:hover{color:var(--sk-primary)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .sk-menu{gap:24px}
  .sk-search input{width:120px}
}
@media (max-width:1023px){
  .sk-menu{display:none}
  .sk-nav-toggle{display:flex}
  .sk-mobile{display:block}
  .sk-footer__grid{grid-template-columns:1fr 1fr;gap:36px}
  .sk-section{padding:72px 0}
  .sk-prep{grid-template-columns:1fr}
  .sk-prep__item{border-right:0;border-bottom:1px solid var(--sk-line)}
  .sk-prep__item:last-child{border-bottom:0}
  .sk-faq-wrap{grid-template-columns:1fr}
  .sk-gloss__row{grid-template-columns:240px 1fr}
}
@media (max-width:767px){
  .sk-search{display:none}
  .sk-tl::before{left:19px;transform:none}
  .sk-tl__row{grid-template-columns:38px 1fr;align-items:start}
  .sk-tl__node{grid-column:1;justify-self:center;margin-top:28px}
  .sk-tl__card{grid-column:2}
  .sk-tl__row--right .sk-tl__card{grid-column:2}
  .sk-gloss__row{grid-template-columns:1fr}
  .sk-gloss dt{border-right:0;border-bottom:1px solid var(--sk-line);padding-bottom:12px}
  .sk-cta{flex-direction:column;align-items:flex-start;padding:32px}
  .sk-cta__actions{width:100%}
  .sk-cta__actions .sk-btn{flex:1 1 100%}
  .sk-section{padding:56px 0}
}
@media (max-width:639px){
  .sk-nav{height:56px}
  .sk-brand{font-size:15px}
  .sk-pagehead{padding:26px 0 44px}
  .sk-footer{padding:44px 0 24px}
  .sk-footer__grid{grid-template-columns:1fr;gap:32px}
  .sk-footer__bottom{flex-direction:column;align-items:flex-start}
  .sk-section{padding:48px 0}
  .sk-tl__card{padding:22px 20px}
  .sk-sidecard{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}