/* roulang page: index */
:root{
  --bg:#070C14;
  --bg-alt-1:#0A111B;
  --bg-alt-2:#0D1624;
  --panel:#0B131F;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --accent:#2FE3C4;
  --warn:#FFB45C;
  --text:#E8F1FB;
  --text-2:#A9BBD0;
  --text-3:#6E8299;
  --line:rgba(120,190,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.07);
  --radius-card:14px;
  --radius-btn:8px;
  --radius-badge:6px;
  --shadow-1:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-2:0 0 0 1px rgba(35,162,255,.35),0 12px 40px -12px rgba(35,162,255,.45);
  --container:1200px;
  --section-y:96px;
  --t:180ms ease-out;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:"Inter","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;height:auto}
a{color:var(--primary);text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t)}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;color:var(--text);letter-spacing:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:15px}
::selection{background:rgba(35,162,255,.35);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- 容器 ---------- */
.rl-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.rl-section{padding:var(--section-y) 0;position:relative}
.rl-section--alt{background:var(--bg-alt-1)}
.rl-section--alt2{background:var(--bg-alt-2)}
.rl-section--line{border-top:1px solid var(--line-soft)}

/* ---------- 区块标题组 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-head__left{max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);font-family:var(--font-num);margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:block;opacity:.8}
.sec-title{font-size:clamp(24px,2.8vw,34px);font-weight:600;line-height:1.28;margin-bottom:12px}
.sec-desc{color:var(--text-2);font-size:15px;line-height:1.8;max-width:660px}
.sec-more{font-size:14px;color:var(--primary);border-bottom:1px solid rgba(35,162,255,.4);padding-bottom:2px;white-space:nowrap}
.sec-more:hover{border-color:var(--accent)}

/* ---------- 按钮 ---------- */
.rl-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;text-align:center;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  min-height:44px;
}
.rl-btn--primary{
  background:linear-gradient(135deg,#2BB0FF 0%,var(--primary) 45%,var(--primary-deep) 100%);
  color:#04121F;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
}
.rl-btn--primary:hover{
  color:#04121F;
  filter:brightness(1.08);
  box-shadow:0 0 26px -4px rgba(35,162,255,.75);
  transform:translateY(-2px);
}
.rl-btn--ghost{background:transparent;border-color:rgba(120,190,255,.28);color:var(--text)}
.rl-btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.rl-btn--sm{padding:9px 18px;font-size:14px;min-height:38px}
.rl-btn:active{transform:translateY(1px)}
.rl-link-underline{color:var(--accent);border-bottom:1px solid rgba(47,227,196,.5);padding-bottom:1px}
.rl-link-underline:hover{color:var(--accent);border-color:var(--accent);border-bottom-width:2px}

/* ---------- 徽标 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--radius-badge);
  font-size:12px;line-height:1.7;letter-spacing:.02em;
  background:rgba(35,162,255,.12);color:#8CD0FF;border:1px solid rgba(35,162,255,.24);
}
.badge--accent{background:rgba(47,227,196,.1);color:var(--accent);border-color:rgba(47,227,196,.28)}
.badge--warn{background:rgba(255,180,92,.1);color:var(--warn);border-color:rgba(255,180,92,.28)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 玻璃卡片 ---------- */
.glass{
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.glass:hover{
  transform:translateY(-4px);
  border-color:rgba(35,162,255,.35);
  box-shadow:0 0 0 1px rgba(35,162,255,.35),0 12px 40px -12px rgba(35,162,255,.45),inset 0 1px 0 rgba(255,255,255,.06);
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  height:64px;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background 200ms ease-out,border-color 200ms ease-out,backdrop-filter 200ms ease-out;
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.82);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-bottom-color:var(--line-soft);
}
.nav-inner{
  height:64px;display:grid;grid-template-columns:55fr 45fr;align-items:center;gap:16px;
}
.nav-left{display:flex;align-items:center;gap:28px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0}
.brand__mark{
  width:30px;height:30px;border-radius:8px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(35,162,255,.9),rgba(14,123,214,.65));
  border:1px solid rgba(120,190,255,.45);
  box-shadow:0 0 16px -4px rgba(35,162,255,.7);
  color:#04121F;font-size:14px;
}
.brand__text{font-size:16px;color:var(--text);white-space:nowrap;letter-spacing:.01em}
.brand__text strong{font-size:17px;font-weight:800;color:#fff;letter-spacing:.02em}
.brand:hover .brand__text{color:#fff}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:6px;
  font-size:14px;color:var(--text-2);white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform 200ms ease-out;
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:14px}
.nav-search{
  display:flex;align-items:center;gap:6px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:5px 8px;transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,162,255,.18)}
.nav-search.is-open{border-color:rgba(35,162,255,.45)}
.search-toggle{
  background:transparent;border:0;color:var(--text-2);font-size:14px;
  width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;
}
.search-toggle:hover{color:var(--accent)}
.search-input{
  width:0;padding:0;border:0;background:transparent;color:var(--text);
  opacity:0;transition:width 220ms ease-out,opacity 220ms ease-out;outline:none;
}
.search-input::placeholder{color:var(--text-3)}
.nav-search.is-open .search-input{width:170px;opacity:1}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:var(--radius-btn);
  background:var(--glass);border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform 200ms ease-out,opacity 200ms ease-out}
body.drawer-open .nav-burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
body.drawer-open .nav-burger span:nth-child(2){opacity:0}
body.drawer-open .nav-burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-drawer{
  position:fixed;top:64px;left:0;right:0;bottom:0;z-index:880;
  background:rgba(7,12,20,.96);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:24px;display:none;flex-direction:column;gap:8px;
  transform:translateY(-12px);opacity:0;
  transition:transform 200ms ease-out,opacity 200ms ease-out;
}
body.drawer-open .nav-drawer{transform:translateY(0);opacity:1}
.nav-drawer a.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 16px;border-radius:10px;
  color:var(--text);font-size:16px;border:1px solid transparent;
}
.nav-drawer a.drawer-link:hover{background:var(--glass);border-color:var(--line)}
.nav-drawer a.drawer-link.is-active{color:var(--accent);border-color:rgba(47,227,196,.3);background:rgba(47,227,196,.06)}
.nav-drawer .drawer-cta{margin-top:auto}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:132px 0 72px;
  min-height:78vh;display:flex;align-items:center;
  background:
    radial-gradient(circle at 88% 10%,rgba(35,162,255,.14),transparent 46%),
    radial-gradient(circle at 6% 88%,rgba(47,227,196,.07),transparent 42%),
    var(--bg);
  border-bottom:1px solid transparent;
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,162,255,.55),rgba(47,227,196,.35),transparent);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(120,190,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 78%);
}
.hero__inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:55fr 45fr;gap:48px;align-items:center;
}
.hero__title{
  font-size:clamp(28px,4.4vw,52px);
  font-weight:600;line-height:1.22;letter-spacing:-.005em;
  margin-bottom:20px;
}
.hero__title em{font-style:normal;color:var(--accent)}
.hero__sub{font-size:16px;color:var(--text-2);line-height:1.8;max-width:520px;margin-bottom:28px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero__trust{display:flex;flex-wrap:wrap;gap:10px 22px}
.hero__trust li{position:relative;padding-left:20px;font-size:14px;color:var(--text-2);line-height:1.9}
.hero__trust li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 10px rgba(47,227,196,.8);
}
.hero__visual{position:relative}
.hero__visual img{
  width:100%;border-radius:var(--radius-card);
  border:1px solid rgba(120,190,255,.2);
  box-shadow:0 24px 60px -28px rgba(0,0,0,.85),0 0 0 1px rgba(35,162,255,.16);
}
.hero__visual::after{
  content:"";position:absolute;right:-2px;bottom:-2px;width:56%;height:56%;
  border-radius:0 0 var(--radius-card) 0;
  background:linear-gradient(315deg,rgba(35,162,255,.4),transparent 62%);
  pointer-events:none;filter:blur(6px);
}
.hero__mask{
  position:absolute;inset:0;border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(7,12,20,.16) 0%,rgba(7,12,20,.58) 100%);
  pointer-events:none;
}
.hero__float{
  position:absolute;left:-24px;bottom:28px;
  padding:12px 16px;border-radius:10px;
  background:rgba(11,19,31,.86);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1);font-size:13px;color:var(--text-2);
}
.hero__float strong{display:block;font-family:var(--font-num);font-size:20px;color:var(--accent);line-height:1.4}

/* ---------- 步骤（编号阶梯） ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative}
.step{
  position:relative;padding:26px 22px 24px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.step:hover{transform:translateY(-4px);border-color:rgba(35,162,255,.35);box-shadow:var(--shadow-2)}
.step::before{
  content:"";position:absolute;left:50%;top:-14px;width:1px;height:14px;
  background:linear-gradient(180deg,transparent,rgba(47,227,196,.6));
}
.step__num{
  font-family:var(--font-num);font-size:13px;letter-spacing:.1em;color:var(--accent);
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
}
.step__num::after{content:"";width:30px;height:1px;background:rgba(47,227,196,.5)}
.step__title{font-size:20px;margin-bottom:10px}
.step__desc{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px}
.step__art{
  height:96px;border-radius:10px;border:1px solid var(--line-soft);
  background:linear-gradient(135deg,rgba(35,162,255,.12),rgba(47,227,196,.06));
  display:flex;align-items:center;justify-content:center;gap:12px;
  color:var(--primary);font-size:22px;
}
.step__art i{opacity:.9}
.step__art small{font-size:12px;color:var(--text-3);letter-spacing:.06em;font-family:var(--font-num)}

/* ---------- 案例卡 ---------- */
.case-list{display:grid;grid-template-columns:1fr;gap:24px}
.case-card{
  display:grid;grid-template-columns:38% 62%;overflow:hidden;
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.case-card:hover{transform:translateY(-4px);border-color:rgba(35,162,255,.35);box-shadow:var(--shadow-2)}
.case-card__media{position:relative;overflow:hidden;min-height:220px}
.case-card__media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.case-card:hover .case-card__media img{transform:scale(1.03)}
.case-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,12,20,.15),rgba(7,12,20,.6))}
.case-card__body{padding:26px 28px}
.case-card__body h3{font-size:20px;margin:14px 0 10px}
.case-card__body p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:14px}
.case-points li{position:relative;padding-left:20px;font-size:14px;color:var(--text-2);line-height:1.9}
.case-points li::before{
  content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px rgba(47,227,196,.7);
}
.case-card__link{display:inline-block;margin-top:16px;font-size:14px;color:var(--primary);border-bottom:1px solid rgba(35,162,255,.4);padding-bottom:2px}
.case-card__link:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 数据条 ---------- */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:32px;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
}
.stat{padding:22px 20px;border-right:1px solid var(--line-soft)}
.stat:last-child{border-right:0}
.stat__num{font-family:var(--font-num);font-size:32px;font-weight:700;color:#fff;line-height:1.2;display:flex;align-items:baseline;gap:6px}
.stat__num span{font-size:14px;color:var(--accent);font-weight:600}
.stat__label{font-size:13px;color:var(--text-3);margin-top:6px;line-height:1.7}

/* ---------- 资讯列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(35,162,255,.35);box-shadow:var(--shadow-2)}
.post-card__media{display:block;position:relative;aspect-ratio:16/10;overflow:hidden;background:#0A111B}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.post-card:hover .post-card__media img{transform:scale(1.03)}
.post-card__body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-card__meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.post-card__time{font-family:var(--font-num);font-size:12px;color:var(--text-3)}
.post-card__title{font-size:17px;line-height:1.55;margin-bottom:10px}
.post-card__title a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__title a:hover{color:var(--primary)}
.post-card__excerpt{
  font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__more{margin-top:auto;font-size:14px;color:var(--primary);border-bottom:1px solid rgba(35,162,255,.4);padding-bottom:2px;align-self:flex-start}
.post-card__more:hover{color:var(--accent);border-color:var(--accent)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;border-radius:var(--radius-card);
  border:1px dashed rgba(120,190,255,.24);background:var(--glass);
}
.empty-state i{font-size:26px;color:var(--text-3);margin-bottom:12px;display:block}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:16px}

/* ---------- FAQ ---------- */
.faq-wrap{
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-1);overflow:hidden;
  border-left:3px solid rgba(255,180,92,.6);
}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 22px;background:transparent;border:0;
  text-align:left;color:var(--text);font-size:16px;font-weight:600;line-height:1.6;
  transition:background var(--t),color var(--t);
}
.faq-q:hover{background:rgba(255,255,255,.04);color:#fff}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;
  border:1px solid rgba(47,227,196,.5);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;transition:transform var(--t),background var(--t);
}
.faq-item.is-open .faq-icon{background:rgba(47,227,196,.14);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 180ms ease-out}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:76ch}
.faq-item.is-open .faq-a{max-height:340px}
.faq-note{
  display:flex;align-items:flex-start;gap:10px;margin-top:18px;padding:12px 16px;
  border-left:3px solid var(--warn);border-radius:8px;
  background:rgba(255,180,92,.07);font-size:13px;color:#E7C89B;line-height:1.8;
}
.faq-note i{color:var(--warn);margin-top:4px}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--radius-card);border:1px solid rgba(35,162,255,.28);
  background:linear-gradient(120deg,rgba(35,162,255,.14),rgba(11,19,31,.9) 55%,rgba(47,227,196,.09));
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-1);
  padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:linear-gradient(rgba(120,190,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.06) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse at 20% 40%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 20% 40%,#000,transparent 72%);
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-band p{font-size:15px;color:var(--text-2);max-width:640px;margin-bottom:10px}
.cta-band small{font-size:13px;color:var(--text-3);display:block}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-alt-1);
  border-top:1px solid transparent;
  position:relative;
  padding:64px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,196,.6),rgba(35,162,255,.35),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px;border-bottom:1px solid var(--line-soft)}
.footer-brand__logo{display:inline-flex;align-items:center;gap:9px;margin-bottom:14px}
.footer-brand__logo .brand__mark{width:28px;height:28px;border-radius:8px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#fff}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--accent)}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.8}
.footer-bottom{
  padding-top:22px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p,.footer-bottom a{font-size:13px;color:var(--text-3);margin:0}
.footer-bottom a:hover{color:var(--accent)}
.to-top{font-size:13px;color:var(--text-3);border-bottom:1px solid transparent}
.to-top:hover{color:var(--accent);border-color:rgba(47,227,196,.5)}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--container:1280px}
}
@media (max-width:1024px){
  :root{--section-y:72px}
  .nav-inner{grid-template-columns:1fr;gap:0}
  .nav-left{gap:0}
  .nav-links{display:none}
  .nav-search{display:none}
  .nav-burger{display:flex}
  .nav-drawer{display:flex}
  .hero{padding:112px 0 56px;min-height:auto}
  .hero__inner{grid-template-columns:1fr;gap:36px}
  .hero__sub{max-width:100%}
  .hero__visual{order:2}
  .hero__float{left:16px;bottom:16px}
  .case-card{grid-template-columns:1fr}
  .case-card__media{min-height:200px;aspect-ratio:16/9}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .rl-container{padding:0 20px}
  .steps{grid-template-columns:1fr;gap:20px}
  .step::before{display:none}
  .stat-bar{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line-soft)}
  .cta-band{padding:32px 24px}
  .cta-band h2{font-size:22px}
}
@media (max-width:520px){
  :root{--section-y:56px}
  .rl-container{padding:0 16px}
  body{font-size:15px}
  .brand__text{font-size:14px}
  .brand__text strong{font-size:15px}
  .post-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .stat-bar{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line-soft);padding:16px 4px}
  .stat:last-child{border-bottom:0}
  .hero__actions .rl-btn{width:100%}
  .hero__float{display:none}
  .sec-head{margin-bottom:24px}
}

/* roulang page: article */
:root{
  --bg:#070C14;
  --panel:#0B131F;
  --panel-2:#0A111B;
  --panel-3:#0D1624;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --accent:#2FE3C4;
  --warn:#FFB45C;
  --text:#E8F1FB;
  --text-2:#A9BBD0;
  --text-3:#6E8299;
  --line:rgba(120,190,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --radius-card:14px;
  --radius-btn:8px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-hover:0 0 0 1px rgba(35,162,255,.35),0 12px 40px -12px rgba(35,162,255,.45);
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(120,190,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out}
a:hover{color:var(--accent)}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:rgba(47,227,196,.28);color:#fff}

.rl-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){.rl-container{max-width:1280px}}

/* ---------- 按钮 ---------- */
.rl-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:all .18s ease-out;
  white-space:nowrap;
}
.rl-btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
}
.rl-btn--primary:hover{
  color:#04121F;
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 26px -4px rgba(35,162,255,.7);
}
.rl-btn--primary:active{transform:translateY(-1px)}
.rl-btn--ghost{
  background:transparent;
  border-color:rgba(120,190,255,.28);
  color:var(--text);
}
.rl-btn--ghost:hover{
  border-color:var(--accent);
  color:var(--accent);
  transform:translateY(-2px);
}
.rl-btn--sm{padding:9px 18px;font-size:14px}
.rl-link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--primary);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.rl-link-arrow:hover{border-bottom-color:var(--accent);color:var(--accent)}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out,backdrop-filter .2s ease-out;
}
.site-header.is-solid{
  background:rgba(9,16,26,.82);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}
.nav-left{display:flex;align-items:center;gap:32px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:none}
.brand:hover{color:var(--text)}
.brand__mark{
  width:30px;height:30px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:9px;
  background:linear-gradient(135deg,rgba(35,162,255,.22),rgba(47,227,196,.14));
  border:1px solid rgba(35,162,255,.45);
  color:var(--accent);
  font-size:13px;
  box-shadow:0 0 16px -6px rgba(35,162,255,.8);
}
.brand__text{font-size:14px;color:var(--text-2);letter-spacing:.02em;white-space:nowrap}
.brand__text strong{font-size:18px;font-weight:700;color:var(--text);letter-spacing:.04em;margin-right:2px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  font-size:14.5px;
  color:var(--text-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:100%;
  bottom:0;
  height:2px;
  background:var(--accent);
  transition:right .18s ease-out;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{right:0}
.nav-link.is-active{color:var(--text)}
.nav-link.is-active::after{right:0}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.nav-search{display:flex;align-items:center}
.search-toggle{
  width:38px;height:38px;
  border-radius:8px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--text-2);
  transition:all .18s ease-out;
}
.search-toggle:hover{color:var(--accent);border-color:rgba(47,227,196,.45)}
.search-input{
  width:0;height:38px;
  opacity:0;
  padding:0;
  margin-left:0;
  border:1px solid transparent;
  border-radius:8px;
  background:rgba(255,255,255,.04);
  color:var(--text);
  font-size:14px;
  transition:width .2s ease-out,opacity .2s ease-out,margin .2s ease-out,padding .2s ease-out;
}
.search-input::placeholder{color:var(--text-3)}
.search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,162,255,.18)}
.nav-search.is-open .search-input{width:200px;opacity:1;padding:0 12px;margin-left:8px;border-color:var(--line)}
.nav-burger{
  display:none;
  width:40px;height:40px;
  border-radius:8px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  padding:0;
}
.nav-burger span{
  display:block;
  width:16px;height:2px;
  margin:3px auto;
  background:var(--text);
  border-radius:2px;
  transition:transform .18s ease-out,opacity .18s ease-out;
}
body.nav-open .nav-burger span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.nav-open .nav-burger span:nth-child(2){opacity:0}
body.nav-open .nav-burger span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 页面头部 / 面包屑 ---------- */
.article-hero{
  padding:132px 0 44px;
  border-bottom:1px solid var(--line-soft);
  background:radial-gradient(1000px 460px at 82% -8%,rgba(35,162,255,.16),transparent 62%),linear-gradient(180deg,var(--panel-2),var(--bg));
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(110,130,153,.6)}
.breadcrumb .current{color:var(--primary)}
.rl-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--accent);
  background:rgba(47,227,196,.09);
  border:1px solid rgba(47,227,196,.28);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:18px;
}
.article-hero h1{
  font-size:clamp(26px,3.6vw,42px);
  font-weight:600;
  line-height:1.24;
  max-width:900px;
  margin:0 0 20px;
}
.meta-row{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:13.5px;
  color:var(--text-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:rgba(110,130,153,.7);display:inline-block}
.meta-row .mono{font-family:var(--font-mono);color:var(--text-2);letter-spacing:.04em}

/* ---------- 文章主体 ---------- */
.article-main{padding:56px 0 88px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 216px;
  gap:56px;
  align-items:start;
}
.article-body{
  min-width:0;
  max-width:72ch;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
}
.article-lead{
  position:relative;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 24px 20px 26px;
  font-size:17px;
  line-height:1.8;
  color:var(--text-2);
  margin:0 0 36px;
  box-shadow:var(--shadow-card);
}
.article-lead::before{
  content:"";
  position:absolute;
  left:-1px;top:16px;bottom:16px;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--accent),rgba(47,227,196,.15));
  box-shadow:0 0 14px rgba(47,227,196,.6);
}
.article-body h2{
  font-size:25px;
  line-height:1.35;
  margin:44px 0 16px;
  padding-left:14px;
  border-left:4px solid var(--primary);
}
.article-body h3{font-size:20px;margin:30px 0 12px;color:var(--text)}
.article-body h4{font-size:17px;margin:22px 0 10px;color:var(--accent)}
.article-body p{margin:0 0 1.1em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px}
.article-body li{position:relative;padding-left:20px;line-height:1.8;margin-bottom:8px}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px -1px rgba(47,227,196,.85);
}
.article-body ol{counter-reset:rl-ol}
.article-body ol li{counter-increment:rl-ol;padding-left:30px}
.article-body ol li::before{
  content:counter(rl-ol,decimal-leading-zero);
  position:absolute;
  left:0;top:0;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--accent);
  letter-spacing:.04em;
}
.article-body blockquote{
  margin:24px 0;
  padding:18px 22px;
  background:rgba(255,255,255,.04);
  border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  margin:26px auto;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
}
.article-body a{
  color:var(--primary);
  border-bottom:1px solid rgba(35,162,255,.42);
  padding-bottom:1px;
}
.article-body a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.article-body code{
  font-family:var(--font-mono);
  font-size:14px;
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  color:var(--accent);
}
.article-body pre{
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  padding:16px 18px;
  overflow-x:auto;
  margin:22px 0;
}
.article-body pre code{background:none;border:0;padding:0;color:var(--text-2)}
.article-body table{
  width:100%;
  border-collapse:collapse;
  font-size:14.5px;
  margin:24px 0;
  display:block;
  overflow-x:auto;
}
.article-body th,.article-body td{
  border:1px solid var(--line);
  padding:10px 14px;
  text-align:left;
  white-space:nowrap;
}
.article-body th{background:rgba(255,255,255,.06);color:var(--text)}
.article-body tbody tr{transition:background .18s ease-out}
.article-body tbody tr:hover{background:rgba(35,162,255,.06)}
.article-body hr{border:0;height:1px;background:linear-gradient(90deg,rgba(47,227,196,.45),transparent);margin:36px 0}

/* ---------- 目录 ---------- */
.article-toc{
  position:sticky;
  top:96px;
  font-size:13px;
  color:var(--text-3);
  border-left:1px solid var(--line-soft);
  padding-left:18px;
}
.article-toc__title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-3);
  margin-bottom:12px;
  display:block;
}
.article-toc a{
  display:block;
  padding:5px 0;
  color:var(--text-3);
  line-height:1.5;
  border-bottom:0;
}
.article-toc a:hover{color:var(--text-2)}
.article-toc a.is-current{color:var(--accent)}

/* ---------- 空状态 ---------- */
.empty-state{
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:48px 28px;
  text-align:center;
  box-shadow:var(--shadow-card);
}
.empty-state i{font-size:26px;color:var(--primary);margin-bottom:14px;display:block}
.empty-state h3{font-size:19px;margin-bottom:10px}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:20px}

/* ---------- 文章尾部 ---------- */
.article-foot{
  margin-top:44px;
  padding-top:26px;
  border-top:1px solid var(--line-soft);
}
.tag-group{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.tag{
  font-size:13px;
  color:var(--text-2);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:6px;
  padding:5px 12px;
  transition:all .18s ease-out;
}
.tag:hover{color:var(--accent);border-color:rgba(47,227,196,.45)}
.foot-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.foot-nav a{
  display:block;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:12px;
  padding:16px 18px;
  transition:all .18s ease-out;
}
.foot-nav a:hover{
  border-color:rgba(35,162,255,.42);
  background:rgba(35,162,255,.07);
  transform:translateY(-2px);
}
.foot-nav span{
  display:block;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:6px;
}
.foot-nav strong{
  display:block;
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  line-height:1.55;
}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 88px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.section-head .tag-line{
  display:block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  margin-bottom:10px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px)}
.section-head p{color:var(--text-2);font-size:14.5px;margin:8px 0 0;max-width:640px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;
  flex-direction:column;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.rel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(35,162,255,.4);
  box-shadow:var(--shadow-hover);
}
.rel-card__media{position:relative;aspect-ratio:16/10;overflow:hidden}
.rel-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.rel-card:hover .rel-card__media img{transform:scale(1.03)}
.rel-card__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.15),rgba(7,12,20,.82));
}
.rel-card__body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card__meta{font-size:12.5px;color:var(--text-3);font-family:var(--font-mono);letter-spacing:.04em}
.rel-card__body h3{font-size:16.5px;line-height:1.5;font-weight:600}
.rel-card__body h3 a{color:var(--text);border:0}
.rel-card:hover .rel-card__body h3 a{color:var(--primary)}
.rel-card__body p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0}
.rel-card__more{margin-top:auto;font-size:13.5px;color:var(--primary)}

/* ---------- CTA ---------- */
.cta-band{
  margin:0 0 88px;
  border:1px solid var(--line);
  border-radius:18px;
  background:
    radial-gradient(600px 240px at 88% 20%,rgba(35,162,255,.2),transparent 66%),
    linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  overflow:hidden;
  position:relative;
}
.cta-band__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:40px 44px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);margin-bottom:10px}
.cta-band p{color:var(--text-2);font-size:14.5px;margin:0;max-width:620px}
.cta-band__actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(47,227,196,.55),rgba(47,227,196,0)) 1;
  background:linear-gradient(180deg,var(--panel-3),var(--bg));
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:36px;
}
.footer-brand__logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0;max-width:320px}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:14px;letter-spacing:.04em}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2);border-bottom:1px solid transparent}
.footer-col a:hover{color:var(--accent);border-bottom-color:rgba(47,227,196,.5)}
.footer-col p{font-size:13.5px;color:var(--text-2);line-height:1.8;margin:0 0 8px}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  border-top:1px solid var(--line-soft);
  padding-top:18px;
}
.footer-bottom p{font-size:13px;color:var(--text-3);margin:0}
.to-top{font-size:13px;color:var(--text-3)}
.to-top:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .rl-container{padding:0 20px}
  .nav-links{display:none}
  .nav-burger{display:block}
  .nav-right .search-toggle{display:none}
  .nav-right .search-input{display:none}
  body.nav-open{overflow:hidden}
  body.nav-open .nav-links{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    position:fixed;
    left:0;right:0;
    top:56px;
    bottom:0;
    padding:16px 20px 96px;
    background:rgba(9,16,26,.96);
    backdrop-filter:blur(18px) saturate(120%);
    -webkit-backdrop-filter:blur(18px) saturate(120%);
    border-top:1px solid var(--line-soft);
    overflow-y:auto;
    animation:drawerIn .2s ease-out;
  }
  @keyframes drawerIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
  body.nav-open .nav-link{
    display:flex;
    align-items:center;
    min-height:52px;
    font-size:16px;
    color:var(--text);
    border-bottom:1px solid var(--line-soft);
  }
  body.nav-open .nav-link::after{display:none}
  body.nav-open .nav-link.is-active{color:var(--accent)}
  .nav-inner{height:56px}
  .article-hero{padding:104px 0 36px}
  .article-main{padding:44px 0 64px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-toc{display:none}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band__inner{padding:32px 28px}
}
@media (max-width:639px){
  .rl-container{padding:0 16px}
  body{font-size:15.5px;line-height:1.8}
  .rl-btn{padding:11px 20px;font-size:14.5px}
  .rl-btn--sm{padding:9px 16px;font-size:13.5px}
  .nav-right .rl-btn--sm{display:none}
  .article-hero{padding:96px 0 30px}
  .article-hero h1{font-size:24px}
  .article-main{padding:36px 0 52px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;margin:34px 0 14px}
  .article-body h3{font-size:18px}
  .article-lead{font-size:15.5px;padding:16px 18px 16px 20px}
  .foot-nav{grid-template-columns:minmax(0,1fr)}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .related{padding:0 0 60px}
  .cta-band{margin:0 0 60px}
  .cta-band__inner{padding:26px 20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;padding-bottom:28px}
  .site-footer{padding:44px 0 22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section-head{margin-bottom:20px}
}

/* roulang page: category1 */
:root{
  --bg:#070C14;
  --bg-alt:#0A111B;
  --bg-alt2:#0D1624;
  --panel:#0B131F;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --accent:#2FE3C4;
  --warn:#FFB45C;
  --text:#E8F1FB;
  --text-2:#A9BBD0;
  --text-3:#6E8299;
  --line:rgba(120,190,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.06);
  --radius-card:14px;
  --radius-btn:8px;
  --radius-badge:6px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 0 0 1px rgba(35,162,255,.35), 0 12px 40px -12px rgba(35,162,255,.45);
  --glow:0 0 18px -4px rgba(35,162,255,.55);
  --section-y:96px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

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

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

body{
  margin:0;
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 88% -6%, rgba(35,162,255,.10), rgba(7,12,20,0) 68%),
    linear-gradient(rgba(255,255,255,.028) 1px, rgba(0,0,0,0) 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, rgba(0,0,0,0) 1px);
  background-size:auto, 64px 64px, 64px 64px;
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;}
a:hover{color:var(--accent);}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
h1,h2,h3,h4{line-height:1.3;font-weight:600;color:var(--text);letter-spacing:0;}
ul,ol{padding-left:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
summary{cursor:pointer;list-style:none;}
summary::-webkit-details-marker{display:none;}

.rl-container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
@media (min-width:1440px){.rl-container{max-width:1280px;}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .2s ease-out,border-color .2s ease-out,backdrop-filter .2s ease-out;
}
.site-header.is-scrolled{
  background:rgba(9,15,24,.86);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px;}
.nav-left{display:flex;align-items:center;gap:28px;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand__mark{
  width:30px;height:30px;border-radius:8px;flex:0 0 30px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;color:#04121F;
  background:linear-gradient(135deg,var(--accent),var(--primary));
  box-shadow:0 0 16px -6px rgba(47,227,196,.6);
}
.brand__text{font-size:15px;letter-spacing:.01em;color:var(--text-2);white-space:nowrap;}
.brand__text strong{font-size:17px;font-weight:700;color:var(--text);margin-right:1px;}
.nav-links{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-block;padding:8px 13px;border-radius:8px;
  font-size:14.5px;color:var(--text-2);white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:var(--glass);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),rgba(47,227,196,0));
}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-search{display:flex;align-items:center;background:var(--glass);border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:border-color .18s ease-out;}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,162,255,.18);}
.search-toggle{
  width:38px;height:36px;border:0;background:transparent;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;
}
.search-toggle:hover{color:var(--accent);}
.search-input{
  width:0;opacity:0;border:0;background:transparent;color:var(--text);
  font-size:14px;height:36px;padding:0;transition:width .2s ease-out,opacity .2s ease-out,padding .2s ease-out;
}
.search-input::placeholder{color:var(--text-3);}
.nav-search.is-open .search-input{width:186px;opacity:1;padding:0 12px 0 0;}
.nav-burger{display:none;width:40px;height:36px;border:1px solid var(--line);border-radius:8px;background:var(--glass);padding:0;}
.nav-burger span{display:block;width:16px;height:1.5px;margin:3px auto;background:var(--text);border-radius:2px;}

/* ---------- buttons ---------- */
.rl-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;padding:12px 24px;line-height:1.2;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,filter .18s ease-out;
}
.rl-btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;box-shadow:var(--glow);
}
.rl-btn--primary:hover{color:#04121F;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 26px -4px rgba(35,162,255,.72);}
.rl-btn--primary:active{transform:translateY(0);}
.rl-btn--ghost{background:transparent;border-color:rgba(120,190,255,.28);color:var(--text);}
.rl-btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
.rl-btn--sm{padding:9px 16px;font-size:14px;}
.rl-link-more{font-size:14px;font-weight:600;border-bottom:1px solid transparent;padding-bottom:2px;}
.rl-link-more:hover{border-bottom-color:var(--accent);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:132px 0 72px;
  background-image:linear-gradient(180deg,rgba(7,12,20,.72),rgba(7,12,20,.94)),url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-80px;bottom:-140px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,162,255,.20),rgba(35,162,255,0) 70%);
  pointer-events:none;
}
.page-hero .rl-container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.6;}
.breadcrumb .current{color:var(--primary);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:end;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--font-num);
  font-size:12px;letter-spacing:.12em;color:var(--accent);text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent);display:inline-block;}
.page-hero h1{font-size:clamp(28px,4.4vw,48px);line-height:1.22;font-weight:600;margin-bottom:18px;}
.hero-lead{font-size:16.5px;color:var(--text-2);max-width:660px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:var(--radius-badge);
  background:var(--glass);border:1px solid var(--line);font-size:13px;color:var(--text-2);
}
.chip i{color:var(--accent);font-size:12px;}
.hero-side{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-card);padding:24px;
}
.hero-side h2{font-size:16px;margin-bottom:14px;}
.hero-side ul{display:grid;gap:12px;}
.hero-side li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7;}
.hero-side li i{color:var(--accent);margin-top:6px;font-size:11px;}

/* ---------- sections ---------- */
.section{padding:var(--section-y) 0;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.section--panel{background:var(--bg-alt2);}
.section-head{margin-bottom:40px;max-width:760px;}
.section-head .tag{
  display:inline-block;font-family:var(--font-num);font-size:12px;letter-spacing:.12em;
  color:var(--accent);margin-bottom:14px;
}
.section-head h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:15.5px;}

/* ---------- steps layout ---------- */
.steps-layout{align-items:flex-start;}
.step-toc{position:relative;}
.toc-inner{
  position:sticky;top:96px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 14px;backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
}
.toc-title{font-size:12px;letter-spacing:.12em;color:var(--text-3);font-family:var(--font-num);padding:0 10px 10px;}
.toc-link{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;
  border-left:2px solid transparent;font-size:13.5px;color:var(--text-2);line-height:1.5;
}
.toc-link span{font-family:var(--font-num);font-size:12px;color:var(--text-3);}
.toc-link:hover{color:var(--text);background:var(--glass-strong);}
.toc-link.is-current{color:var(--accent);border-left-color:var(--accent);background:rgba(47,227,196,.07);}
.toc-link.is-current span{color:var(--accent);}
.toc-back{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:0 10px;font-size:13.5px;color:var(--text-3);}
.toc-back:hover{color:var(--primary);}

.step-list{display:grid;gap:8px;}
.step-block{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);gap:24px;padding-bottom:32px;scroll-margin-top:96px;}
.step-block::before{
  content:"";position:absolute;left:31px;top:60px;bottom:6px;width:1px;
  background:linear-gradient(180deg,rgba(47,227,196,.45),rgba(47,227,196,0));
}
.step-block:last-child{padding-bottom:0;}
.step-block:last-child::before{display:none;}
.step-index{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:17px;font-weight:600;color:var(--accent);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
}
.step-card{
  display:grid;grid-template-columns:minmax(0,1fr) 208px;gap:26px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-card);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
  transition:box-shadow .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.step-card:hover{border-color:rgba(35,162,255,.35);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.step-card h3{font-size:20px;margin-bottom:12px;}
.step-card p{font-size:15px;color:var(--text-2);margin-bottom:10px;}
.step-tip{
  display:flex;gap:9px;margin-top:14px;padding:10px 13px;border-radius:8px;
  background:rgba(47,227,196,.07);border:1px solid rgba(47,227,196,.22);
  font-size:13.5px;color:var(--text-2);line-height:1.7;
}
.step-tip i{color:var(--accent);margin-top:5px;font-size:11px;}
.step-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);border:1px solid var(--line);}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.check-item{
  display:flex;gap:14px;align-items:flex-start;padding:20px 22px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.check-item:hover{border-color:rgba(47,227,196,.32);box-shadow:0 0 0 1px rgba(47,227,196,.16);}
.check-dot{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(47,227,196,.14);color:var(--accent);font-size:11px;margin-top:3px;
}
.check-item h3{font-size:16px;margin-bottom:6px;}
.check-item p{font-size:14px;color:var(--text-2);line-height:1.75;}

/* ---------- notice ---------- */
.notice{
  position:relative;padding:28px 30px 28px 34px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.notice::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--warn);box-shadow:0 0 18px rgba(255,180,92,.4);}
.notice-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.notice-badge{
  display:inline-flex;align-items:center;gap:7px;padding:5px 11px;border-radius:var(--radius-badge);
  background:rgba(255,180,92,.12);border:1px solid rgba(255,180,92,.34);color:var(--warn);font-size:12.5px;font-weight:600;
}
.notice-head h2{font-size:22px;}
.notice-list{display:grid;gap:14px;}
.notice-list li{display:flex;gap:12px;font-size:15px;color:var(--text-2);line-height:1.8;}
.notice-list li i{color:var(--warn);margin-top:8px;font-size:10px;}
.notice-foot{margin-top:20px;font-size:14px;color:var(--text-3);}

/* ---------- faq ---------- */
.faq-simple{display:grid;gap:14px;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-item[open]{border-color:rgba(35,162,255,.34);box-shadow:0 0 0 1px rgba(35,162,255,.14);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:17px 22px;font-size:16px;font-weight:600;color:var(--text);min-height:56px;
}
.faq-item summary:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;transition:transform .18s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:1.6px;}
.faq-icon::after{width:1.6px;height:12px;transition:opacity .18s ease-out;}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-answer{padding:0 22px 20px;font-size:15px;color:var(--text-2);line-height:1.8;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(35,162,255,.14),rgba(47,227,196,.08) 62%,rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:44px 40px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  backdrop-filter:blur(16px) saturate(120%);-webkit-backdrop-filter:blur(16px) saturate(120%);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,162,255,.22),rgba(35,162,255,0) 70%);
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--text-2);font-size:15px;max-width:560px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-note{font-size:13px;color:var(--text-3);}

.back-home{display:flex;justify-content:center;padding:0 0 88px;}
.back-home a{font-size:14.5px;font-weight:600;display:inline-flex;align-items:center;gap:8px;border-bottom:1px solid transparent;padding-bottom:2px;}
.back-home a:hover{border-bottom-color:var(--accent);}

/* ---------- footer ---------- */
.site-footer{
  background:var(--bg-alt);
  border-top:1px solid transparent;
  background-image:linear-gradient(var(--bg-alt),var(--bg-alt)),linear-gradient(90deg,rgba(47,227,196,.55),rgba(47,227,196,0));
  background-origin:border-box;background-clip:padding-box,border-box;
  padding:64px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand__logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:320px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--accent);}
.footer-col p{font-size:13.5px;color:var(--text-3);line-height:1.8;margin-bottom:8px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding:20px 0 28px;border-top:1px solid var(--line-soft);
}
.footer-bottom p{font-size:13px;color:var(--text-3);}
.to-top{font-size:13px;color:var(--text-3);}
.to-top:hover{color:var(--accent);}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .nav-link{padding:8px 10px;font-size:14px;}
  .nav-left{gap:18px;}
}
@media (max-width:1024px){
  :root{--section-y:72px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;align-items:start;}
  .hero-side{max-width:520px;}
  .step-card{grid-template-columns:1fr;gap:20px;}
  .step-media{order:2;}
  .toc-inner{position:static;}
  .step-toc{display:none;}
  .steps-layout{display:block;}
  .step-block{grid-template-columns:56px minmax(0,1fr);gap:18px;scroll-margin-top:88px;}
  .step-index{width:48px;height:48px;border-radius:12px;font-size:15px;}
  .step-block::before{left:24px;top:52px;}
  .nav-burger{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;}
  .nav-links{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:70;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:84px 24px 32px;
    background:rgba(9,15,24,.96);
    backdrop-filter:blur(18px) saturate(120%);-webkit-backdrop-filter:blur(18px) saturate(120%);
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform .25s ease-out,opacity .25s ease-out;
    overflow-y:auto;
  }
  .site-header.is-open .nav-links{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav-link{padding:14px 12px;font-size:17px;min-height:52px;display:flex;align-items:center;border-radius:10px;border-bottom:1px solid var(--line-soft);}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{color:var(--accent);}
  .search-input{display:none;}
  .nav-search{display:none;}
  .checks-grid,.check-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;padding:34px 26px;}
}
@media (max-width:768px){
  .page-hero{padding:104px 0 56px;}
  .check-grid{grid-template-columns:1fr;}
  .cta-band{padding:30px 22px;}
}
@media (max-width:520px){
  :root{--section-y:56px;}
  .rl-container{padding-left:16px;padding-right:16px;}
  body{font-size:15px;}
  .brand__text{font-size:13px;}
  .brand__text strong{font-size:15px;}
  .brand__mark{width:28px;height:28px;flex:0 0 28px;}
  .nav-right{gap:8px;}
  .rl-btn{padding:11px 18px;font-size:14.5px;}
  .rl-btn--sm{padding:8px 13px;font-size:13.5px;}
  .step-block{grid-template-columns:1fr;gap:14px;}
  .step-block::before{display:none;}
  .step-card{padding:20px 18px;}
  .step-card h3{font-size:18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .rl-btn{width:100%;}
}

/* roulang page: category2 */
:root{
  --bg:#F5F9FD;
  --bg-soft:#EAF3FC;
  --panel:#FFFFFF;
  --ink:#0D1B2A;
  --ink-2:#43596F;
  --ink-3:#7B8FA5;
  --line:#DBE7F3;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --primary-soft:#E7F3FF;
  --mint:#16C4A8;
  --mint-soft:#E4FAF5;
  --amber:#EF9F3C;
  --amber-soft:#FFF6E9;
  --radius-xl:24px;
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-xs:0 2px 8px rgba(13,43,76,.06);
  --shadow-sm:0 12px 26px -18px rgba(13,43,76,.30);
  --shadow-md:0 22px 48px -26px rgba(13,43,76,.40);
  --shadow-glow:0 16px 38px -16px rgba(35,162,255,.55);
  --ease:180ms ease-out;
  --sec-gap:96px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:"Inter","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background-color:var(--bg);
  background-image:radial-gradient(880px 460px at 88% -140px, rgba(35,162,255,.16), transparent 72%),
                   radial-gradient(620px 420px at -60px 320px, rgba(22,196,168,.10), transparent 70%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;line-height:1.32;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:var(--primary-deep);text-decoration:none;transition:color var(--ease),border-color var(--ease),box-shadow var(--ease),background var(--ease);}
a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
img{display:block;max-width:100%;height:auto;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;}
::selection{background:rgba(35,162,255,.22);}

.rl-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.grid-x{width:100%;}
.grid-margin-x > .cell{margin-bottom:24px;}

/* ---------- 按钮 ---------- */
.rl-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.rl-btn:active{transform:translateY(1px);}
.rl-btn:focus-visible{outline:2px solid var(--mint);outline-offset:2px;}
.rl-btn--primary{
  background:linear-gradient(135deg,#3FB2FF 0%,var(--primary-deep) 100%);
  color:#04121F;
  box-shadow:var(--shadow-glow);
}
.rl-btn--primary:hover{color:#04121F;text-decoration:none;transform:translateY(-2px);box-shadow:0 20px 42px -14px rgba(35,162,255,.72);}
.rl-btn--ghost{
  background:rgba(255,255,255,.7);
  border-color:rgba(35,162,255,.32);
  color:var(--primary-deep);
}
.rl-btn--ghost:hover{color:var(--primary);text-decoration:none;border-color:var(--mint);transform:translateY(-2px);}
.rl-btn--sm{padding:10px 18px;font-size:14px;}
.rl-btn--block{width:100%;}

.text-link{font-weight:600;display:inline-flex;align-items:center;gap:6px;border-bottom:2px solid transparent;transition:border-color var(--ease),color var(--ease);}
.text-link:hover{text-decoration:none;border-bottom-color:var(--mint);color:var(--primary-deep);}
.text-link i{font-size:12px;transition:transform var(--ease);}
.text-link:hover i{transform:translateX(3px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,249,253,.82);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -26px rgba(13,43,76,.65);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:24px;}
.nav-left{display:flex;align-items:center;gap:32px;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);}
.brand:hover{text-decoration:none;color:var(--ink);}
.brand__mark{
  width:34px;height:34px;border-radius:11px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#3FB2FF,var(--primary-deep));
  color:#04121F;font-size:14px;box-shadow:var(--shadow-sm);
}
.brand__text{font-size:17px;color:var(--ink);letter-spacing:.01em;}
.brand__text strong{font-weight:700;font-size:18px;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:var(--radius-sm);
  font-size:15px;color:var(--ink-2);
}
.nav-link:hover{color:var(--primary-deep);text-decoration:none;background:var(--primary-soft);}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--mint),var(--primary));
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-search{position:relative;display:flex;align-items:center;}
.search-toggle{
  width:38px;height:38px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:rgba(255,255,255,.8);color:var(--ink-3);
  display:inline-flex;align-items:center;justify-content:center;
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.search-toggle:hover{color:var(--primary-deep);border-color:rgba(35,162,255,.4);}
.search-input{
  width:0;opacity:0;padding:0;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.9);color:var(--ink);height:38px;
  transition:width var(--ease),opacity var(--ease),padding var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.nav-search.is-open .search-input{
  width:200px;opacity:1;padding:0 12px;margin-left:8px;
}
.search-input::placeholder{color:var(--ink-3);}
.search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,162,255,.18);}
.nav-burger{
  display:none;width:40px;height:40px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.8);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform var(--ease),opacity var(--ease);}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.mobile-drawer{
  position:fixed;inset:0;z-index:70;display:flex;flex-direction:column;
  padding:84px 24px 32px;background:rgba(255,255,255,.97);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform 220ms ease-out,opacity 220ms ease-out,visibility 220ms;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;font-size:17px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.drawer-link.is-active{color:var(--primary-deep);font-weight:600;}
.mobile-drawer .drawer-foot{margin-top:auto;padding-top:24px;}
body.drawer-open{overflow:hidden;}

/* ---------- 通用区块 ---------- */
.sec{padding:var(--sec-gap) 0;}
.sec--tight{padding:64px 0;}
.sec--soft{background:linear-gradient(180deg,rgba(234,243,252,.6),rgba(245,249,253,0));}
.sec-head{max-width:760px;margin-bottom:40px;}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--primary-deep);background:var(--primary-soft);
  padding:6px 12px;border-radius:var(--radius-pill);margin-bottom:16px;font-weight:600;
}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.sec-head p{color:var(--ink-2);font-size:16px;}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:56px 0 72px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(700px 380px at 78% 0%, rgba(35,162,255,.14), transparent 70%),
    linear-gradient(180deg,rgba(255,255,255,.75),rgba(245,249,253,0));
}
.hero-grid{align-items:center;}
.hero-copy{max-width:560px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--primary-deep);background:rgba(255,255,255,.85);
  border:1px solid rgba(35,162,255,.24);border-radius:var(--radius-pill);
  padding:7px 14px;margin-bottom:20px;
}
.eyebrow i{font-size:11px;}
.hero h1{font-size:clamp(30px,4.2vw,48px);line-height:1.22;margin-bottom:18px;}
.h1-sub{display:block;margin-top:12px;font-size:clamp(16px,1.7vw,20px);font-weight:500;color:var(--ink-2);line-height:1.6;}
.hero-lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:520px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 26px;padding-top:22px;border-top:1px dashed var(--line);}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--ink-2);}
.hero-points i{color:var(--mint);font-size:13px;}
.hero-visual{
  position:relative;margin:0;border-radius:var(--radius-xl);overflow:hidden;
  background:var(--panel);border:1px solid rgba(255,255,255,.9);
  box-shadow:var(--shadow-md);
}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform 400ms ease-out;}
.hero-visual:hover img{transform:scale(1.03);}
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(13,27,42,0) 45%,rgba(13,27,42,.42) 100%);
}
.hero-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:10px;
  padding:11px 16px;border-radius:var(--radius);
  background:rgba(255,255,255,.92);box-shadow:var(--shadow-sm);
  font-size:13px;color:var(--ink);font-weight:600;
}
.hero-badge i{color:var(--mint);}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:rgba(255,255,255,.7);overflow:hidden;
}
.stat-strip li{padding:24px 22px;border-right:1px solid var(--line);}
.stat-strip li:last-child{border-right:0;}
.stat-num{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--ink);line-height:1.2;}
.stat-num span{font-size:15px;font-weight:600;color:var(--primary-deep);margin-left:4px;}
.stat-label{font-size:13px;color:var(--ink-3);margin-top:6px;}

/* ---------- 核对清单 ---------- */
.check-card{
  display:flex;gap:16px;height:100%;padding:22px;
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.check-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(35,162,255,.32);}
.check-dot{
  flex:none;width:28px;height:28px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--mint-soft);color:var(--mint);font-size:12px;margin-top:3px;
}
.check-card h3{font-size:17px;margin-bottom:8px;}
.check-card p{font-size:14px;line-height:1.75;color:var(--ink-2);}

/* ---------- 风险对照列表 ---------- */
.risk-list{border-top:1px solid var(--line);}
.risk-row{
  display:grid;grid-template-columns:minmax(180px,1fr) minmax(0,2fr);
  gap:20px;padding:22px 4px;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.risk-row:hover{background:rgba(255,255,255,.75);}
.risk-name{display:flex;align-items:flex-start;gap:10px;font-size:16px;font-weight:600;color:var(--ink);}
.risk-name i{color:var(--amber);font-size:14px;margin-top:6px;}
.risk-body{font-size:15px;color:var(--ink-2);}

/* ---------- 步骤 ---------- */
.steps{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step{
  position:relative;padding:28px 24px 26px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(35,162,255,.32);}
.step-num{
  font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--mint);margin-bottom:14px;display:block;
}
.step h3{font-size:18px;margin-bottom:10px;}
.step p{font-size:14px;line-height:1.75;}
.step::before{
  content:"";position:absolute;left:24px;top:0;width:34px;height:3px;border-radius:0 0 3px 3px;
  background:linear-gradient(90deg,var(--mint),var(--primary));
}
.steps::after{
  content:"";position:absolute;top:50%;left:8%;right:8%;height:1px;
  background:repeating-linear-gradient(90deg,rgba(35,162,255,.35) 0 6px,transparent 6px 14px);
  z-index:-1;
}

/* ---------- 注意事项 ---------- */
.note-box{
  background:var(--amber-soft);border-left:4px solid var(--amber);
  border-radius:var(--radius-lg);padding:30px 32px;
}
.note-box h2{font-size:20px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.note-box h2 i{color:var(--amber);font-size:16px;}
.note-box ul li{
  position:relative;padding-left:20px;margin-bottom:12px;font-size:15px;color:#6B5027;
}
.note-box ul li:last-child{margin-bottom:0;}
.note-box ul li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--amber);opacity:.75;
}

/* ---------- FAQ ---------- */
.faq-wrap{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-xs);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:rgba(35,162,255,.3);}
.faq-item[open]{border-color:rgba(35,162,255,.4);box-shadow:var(--shadow-sm);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:56px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\2b";font-family:var(--font-num);font-size:20px;line-height:1;
  color:var(--mint);flex:none;transition:transform var(--ease);
}
.faq-item[open] summary::after{content:"\2212";}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-2);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-xl);
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:linear-gradient(120deg,#0E7BD6 0%,#23A2FF 52%,#16C4A8 100%);
  color:#04202F;box-shadow:var(--shadow-md);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.16) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:38px 38px;opacity:.5;pointer-events:none;
}
.cta-band__text{position:relative;max-width:620px;}
.cta-band h2{color:#04202F;font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-band p{color:rgba(4,32,47,.82);font-size:15px;margin:0;}
.cta-band__actions{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:12px;}
.cta-band .rl-btn--primary{background:#04202F;color:#E8F6FF;box-shadow:0 14px 30px -14px rgba(4,32,47,.7);}
.cta-band .rl-btn--primary:hover{color:#FFFFFF;background:#062C41;}
.cta-band small{font-size:13px;color:rgba(4,32,47,.78);}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec-gap);
  background:#FFFFFF;border-top:1px solid var(--line);
  padding:64px 0 28px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,rgba(22,196,168,0),var(--mint) 30%,var(--primary) 70%,rgba(35,162,255,0));
  opacity:.6;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand__logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--ink);}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--ink-2);}
.footer-col a:hover{color:var(--primary-deep);}
.footer-col p{font-size:14px;color:var(--ink-3);line-height:1.8;margin-bottom:8px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ink-3);margin:0;}
.to-top{font-size:13px;color:var(--ink-3);}
.to-top:hover{color:var(--primary-deep);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  :root{--sec-gap:72px;}
  .rl-container{padding:0 20px;}
  .nav-links{display:none;}
  .nav-burger{display:flex;}
  .nav-search{display:none;}
  .hero{padding:40px 0 56px;}
  .hero-copy{max-width:none;}
  .hero-visual{margin-top:32px;}
  .steps{grid-template-columns:1fr;}
  .steps::after{display:none;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-strip li:nth-child(2){border-right:0;}
  .stat-strip li:nth-child(1),.stat-strip li:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px;}
}
@media screen and (max-width:768px){
  :root{--sec-gap:64px;}
  body{font-size:15.5px;}
  .hero h1{font-size:clamp(26px,7vw,34px);}
  .sec-head{margin-bottom:28px;}
  .sec-head--row{flex-direction:column;align-items:flex-start;gap:12px;}
  .risk-row{grid-template-columns:1fr;gap:8px;padding:18px 2px;}
  .risk-name{margin-bottom:2px;}
  .hero-visual img{aspect-ratio:16/10;}
  .note-box{padding:24px 22px;}
  .cta-band{padding:30px 24px;border-radius:var(--radius-lg);}
}
@media screen and (max-width:520px){
  :root{--sec-gap:56px;}
  .rl-container{padding:0 16px;}
  .nav-inner{min-height:60px;}
  .brand__text{font-size:15px;}
  .brand__text strong{font-size:16px;}
  .hero{padding:28px 0 44px;}
  .hero-actions .rl-btn{width:100%;}
  .hero-points{flex-direction:column;gap:10px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-strip li{border-right:0;border-bottom:1px solid var(--line);}
  .stat-strip li:last-child{border-bottom:0;}
  .footer-grid{grid-template-columns:1fr;}
  .check-card{padding:18px;}
  .faq-item summary{padding:16px;font-size:15px;}
  .faq-body{padding:0 16px 18px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category3 */
:root{
  --bg:#070C14;
  --panel:#0B131F;
  --section-a:#0A111B;
  --section-b:#0D1624;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --teal:#2FE3C4;
  --amber:#FFB45C;
  --text:#E8F1FB;
  --text-2:#A9BBD0;
  --text-3:#6E8299;
  --line:rgba(120,190,255,.14);
  --line-soft:rgba(120,190,255,.10);
  --glass:rgba(255,255,255,.045);
  --radius-card:14px;
  --radius-btn:8px;
  --radius-badge:6px;
  --shadow:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 0 0 1px rgba(35,162,255,.35),0 12px 40px -12px rgba(35,162,255,.45);
  --ease:180ms ease-out;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),border-color var(--ease)}
a:hover{color:#5CBBFF}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:600;line-height:1.35;letter-spacing:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}

.rl-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
@media(min-width:1440px){.rl-container{max-width:1280px}}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  border-bottom:1px solid transparent;
  transition:background 200ms ease-out,border-color 200ms ease-out,backdrop-filter 200ms ease-out;
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.86);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  border-bottom-color:rgba(255,255,255,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:64px}
.nav-left{display:flex;align-items:center;gap:26px;min-width:0}
.nav-right{display:flex;align-items:center;gap:12px}

.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);white-space:nowrap}
.brand:hover{color:var(--text)}
.brand__mark{
  width:32px;height:32px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;font-size:14px;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
  flex:0 0 auto;
}
.brand__text{font-size:15px;color:var(--text);letter-spacing:.01em}
.brand__text strong{font-size:18px;font-weight:700;margin-right:1px}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:14px;color:var(--text-2);
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text)}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--teal),var(--primary));
}

.nav-search{
  display:flex;align-items:center;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(35,162,255,.18)}
.search-toggle{
  width:36px;height:36px;border:0;background:transparent;color:var(--text-2);
  cursor:pointer;font-size:13px;transition:color var(--ease);
}
.search-toggle:hover{color:var(--teal)}
.search-input{
  width:0;padding:0;border:0;background:transparent;color:var(--text);
  font-size:14px;outline:none;
  transition:width 240ms ease-out,padding 240ms ease-out;
}
.search-input::placeholder{color:var(--text-3)}
.nav-search.is-open .search-input{width:180px;padding-right:12px}

.nav-burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:rgba(255,255,255,.04);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color var(--ease),background var(--ease);
}
.nav-burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--ease),opacity var(--ease)}
.nav-burger:hover{border-color:rgba(120,190,255,.32)}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.rl-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.rl-btn--sm{padding:9px 18px;font-size:14px}
.rl-btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
}
.rl-btn--primary:hover{
  color:#04121F;transform:translateY(-2px);
  box-shadow:0 0 26px -2px rgba(35,162,255,.7);
  filter:brightness(1.08);
}
.rl-btn--primary:active{transform:translateY(0)}
.rl-btn--ghost{
  background:transparent;border-color:rgba(120,190,255,.28);color:var(--text);
}
.rl-btn--ghost:hover{border-color:var(--teal);color:var(--teal);transform:translateY(-2px)}
.rl-btn--ghost:active{transform:translateY(0)}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--teal);
  border-bottom:1px solid rgba(47,227,196,.35);padding-bottom:2px;
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.text-link:hover{color:var(--teal);border-color:var(--teal);transform:translateX(3px)}

/* ---------- 徽标 / 小标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-badge);
  font-size:12px;letter-spacing:.06em;
  background:rgba(35,162,255,.12);border:1px solid rgba(35,162,255,.28);color:#8FD0FF;
}
.badge--teal{background:rgba(47,227,196,.1);border-color:rgba(47,227,196,.28);color:#7FF0DC}
.badge--amber{background:rgba(255,180,92,.1);border-color:rgba(255,180,92,.3);color:var(--amber)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--teal);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--teal);display:inline-block}

/* ---------- 首屏 ---------- */
.page-hero{position:relative;overflow:hidden;padding:calc(64px + 84px) 0 84px}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.32;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 78% 8%,rgba(35,162,255,.20),transparent 62%),
    linear-gradient(180deg,rgba(7,12,20,.74) 0%,rgba(7,12,20,.92) 58%,#070C14 100%);
}
.page-hero__inner{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb span.sep{color:#3A4B60}
.breadcrumb .current{color:var(--primary)}

.page-hero h1{font-size:clamp(28px,4.4vw,52px);font-weight:600;line-height:1.22;margin:14px 0 18px}
.page-hero__lead{max-width:720px;font-size:16px;color:var(--text-2);line-height:1.85}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:28px;font-size:14px;color:var(--text-2)}
.hero-facts li{display:flex;align-items:center;gap:8px}
.hero-facts i{color:var(--teal);font-size:12px}

/* ---------- 区块骨架 ---------- */
.section{padding:96px 0}
.section--a{background:var(--section-a)}
.section--b{background:var(--section-b)}
.section--plain{background:var(--bg)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:40px}
.section-head__text{max-width:720px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);margin:12px 0 12px}
.section-head p{font-size:15px;color:var(--text-2)}

/* ---------- 设备矩阵 ---------- */
.device-intro{max-width:760px;font-size:15px;color:var(--text-2);margin-bottom:36px}
.device-card{
  position:relative;height:100%;display:flex;flex-direction:column;
  border-radius:var(--radius-card);overflow:hidden;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.device-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(120,190,255,.22)}
.device-card__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:#0A111B}
.device-card__media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.device-card:hover .device-card__media img{transform:scale(1.03)}
.device-card__mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,0) 34%,rgba(7,12,20,.55) 66%,rgba(7,12,20,.92) 100%);
}
.device-card__name{position:absolute;left:18px;bottom:14px;z-index:2;font-size:17px;font-weight:600;color:var(--text)}
.device-card__name small{display:block;font-size:12px;font-weight:400;color:#9DBBD6;letter-spacing:.06em;margin-top:2px}
.device-card__body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:14px;flex:1}
.device-card__body p{font-size:14px;color:var(--text-2);line-height:1.7}
.device-card__points{display:flex;flex-direction:column;gap:8px;margin-top:auto}
.device-card__points li{display:flex;gap:9px;font-size:13.5px;color:var(--text-2);line-height:1.65}
.device-card__points i{color:var(--teal);font-size:11px;margin-top:7px}
.device-grid-cell{margin-bottom:30px}

/* ---------- 一致性条目列表 ---------- */
.check-list{border-top:1px solid var(--line);margin-top:8px}
.check-item{
  display:flex;align-items:flex-start;gap:18px;
  padding:20px 6px;border-bottom:1px solid var(--line);
  transition:background var(--ease),padding-left var(--ease);
}
.check-item:hover{background:rgba(255,255,255,.03);padding-left:14px}
.check-item__no{
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--teal);
  min-width:38px;padding-top:4px;
}
.check-item__body{flex:1;min-width:0}
.check-item__body h3{font-size:16px;margin-bottom:6px}
.check-item__body p{font-size:14px;color:var(--text-2);line-height:1.7}
.check-item__tag{
  flex:0 0 auto;font-size:12px;color:var(--text-3);
  border:1px solid var(--line-soft);border-radius:var(--radius-badge);
  padding:3px 10px;margin-top:4px;white-space:nowrap;
}

/* ---------- 阶段进度 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px}
.step{
  position:relative;padding:24px 20px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.step:hover{border-color:rgba(47,227,196,.3);transform:translateY(-3px);box-shadow:var(--shadow)}
.step__no{font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--teal);display:block;margin-bottom:12px}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14px;color:var(--text-2);line-height:1.7}
.step::before{
  content:"";position:absolute;top:40px;left:-24px;width:24px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,196,.55));
}
.step:first-child::before{display:none}

/* ---------- 对照表 ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);
  background:rgba(255,255,255,.03);margin-top:8px;
}
table.compare{width:100%;min-width:680px;border-collapse:collapse;font-size:14.5px}
.compare th,.compare td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top}
.compare thead th{
  background:rgba(255,255,255,.05);color:var(--text-2);
  font-size:13px;font-weight:600;letter-spacing:.08em;white-space:nowrap;
}
.compare tbody tr{transition:background var(--ease)}
.compare tbody tr:hover{background:rgba(255,255,255,.04)}
.compare tbody tr:last-child td{border-bottom:0}
.compare td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.compare td{color:var(--text-2)}

/* ---------- 注意事项 ---------- */
.notice{
  position:relative;margin-top:28px;padding:20px 22px 20px 26px;
  border-radius:var(--radius-card);
  background:rgba(255,180,92,.05);
  border:1px solid rgba(255,180,92,.22);
}
.notice::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--amber)}
.notice h3{font-size:15px;color:var(--amber);margin-bottom:8px}
.notice p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-list{
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  overflow:hidden;
}
.faq-item+.faq-item{border-top:1px solid var(--line-soft)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 22px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--text);font-size:15.5px;font-weight:600;
  transition:background var(--ease);
}
.faq-q:hover{background:rgba(255,255,255,.04)}
.faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--teal);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease-out}
.faq-a__inner{padding:0 22px 20px;font-size:15px;color:var(--text-2);line-height:1.8}
.faq-item.is-open .faq-a{max-height:340px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  padding:40px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(520px 260px at 88% 20%,rgba(35,162,255,.16),transparent 68%),
    linear-gradient(180deg,rgba(255,255,255,.02),transparent);
  pointer-events:none;
}
.cta-band__text{position:relative;z-index:1;max-width:640px}
.cta-band__text h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.cta-band__text p{font-size:15px;color:var(--text-2)}
.cta-band__actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px}
.cta-note{margin-top:18px;font-size:13px;color:var(--text-3)}
.back-home{margin-top:26px;text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;padding:64px 0 28px;
  background:var(--bg);
  border-top:1px solid transparent;
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,196,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand__logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.75;max-width:320px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--teal)}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:8px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}
.to-top{font-size:13px;color:var(--text-3)}
.to-top:hover{color:var(--teal)}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .nav-links{gap:0}
  .nav-link{padding:8px 9px;font-size:13.5px}
}
@media(max-width:1024px){
  .nav-burger{display:inline-flex}
  .nav-links{
    position:fixed;top:56px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:16px 20px 96px;
    background:rgba(7,12,20,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-top:1px solid rgba(255,255,255,.08);
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:transform 200ms ease-out,opacity 200ms ease-out,visibility 200ms ease-out;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:none;opacity:1;visibility:visible}
  .nav-link{height:52px;display:flex;align-items:center;font-size:16px;border-radius:8px}
  .nav-link.is-active{background:rgba(47,227,196,.08)}
  .nav-link.is-active::after{left:0;right:auto;width:3px;height:22px;top:15px;bottom:auto;border-radius:3px}
  .nav-inner{height:56px}
  .page-hero{padding:calc(56px + 64px) 0 64px}
  .section{padding:72px 0}
  .nav-search{display:none}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:640px){
  .rl-container{padding:0 16px}
  .section{padding:56px 0}
  .page-hero{padding:calc(56px + 48px) 0 56px}
  .page-hero__actions{gap:10px}
  .rl-btn{width:100%}
  .page-hero__actions .rl-btn{width:100%}
  .section-head{margin-bottom:28px}
  .steps{grid-template-columns:1fr}
  .step::before{display:none}
  .check-item{flex-wrap:wrap;gap:10px}
  .check-item__tag{margin-left:56px}
  .device-card__name{font-size:16px}
  .cta-band{padding:28px 20px;flex-direction:column;align-items:flex-start}
  .cta-band__actions{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media(max-width:400px){
  .brand__text{font-size:14px}
  .brand__text strong{font-size:16px}
}

/* roulang page: category4 */
:root{
  --bg:#070C14;
  --panel:#0B131F;
  --sec-a:#0A111B;
  --sec-b:#0D1624;
  --primary:#23A2FF;
  --primary-deep:#0E7BD6;
  --accent:#2FE3C4;
  --warn:#FFB45C;
  --text:#E8F1FB;
  --text-2:#A9BBD0;
  --text-3:#6E8299;
  --line:rgba(120,190,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --radius-card:14px;
  --radius-btn:8px;
  --radius-badge:6px;
  --shadow:0 8px 24px -12px rgba(0,0,0,.6);
  --ease:180ms ease-out;
  --container:1200px;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease);}
a:hover{color:var(--accent);}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;color:var(--text);letter-spacing:0;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:rgba(35,162,255,.32);color:#fff;}

.rl-container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media(min-width:1440px){
  .rl-container{max-width:1280px;}
}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:64px;
  display:flex;
  align-items:center;
  border-bottom:1px solid transparent;
  background:transparent;
  transition:background 200ms ease-out,border-color 200ms ease-out,backdrop-filter 200ms ease-out;
}
.site-header.is-scrolled{
  background:rgba(11,19,31,.84);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  border-bottom-color:var(--line-soft);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.nav-left{display:flex;align-items:center;gap:28px;min-width:0;}
.nav-right{display:flex;align-items:center;gap:12px;}

.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);white-space:nowrap;}
.brand:hover{color:var(--text);}
.brand__mark{
  width:30px;height:30px;
  display:grid;place-items:center;
  border-radius:var(--radius-badge);
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;font-size:14px;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
  flex:0 0 auto;
}
.brand__text{font-size:15px;letter-spacing:.01em;color:var(--text);}
.brand__text strong{font-size:18px;font-weight:700;}

.nav-links{display:flex;align-items:center;gap:22px;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:6px 2px;
  font-size:14px;
  color:var(--text-2);
  text-decoration:none;
}
.nav-link:hover{color:var(--text);}
.nav-link.is-active{color:var(--text);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 10px -2px rgba(47,227,196,.8);
}

.nav-search{display:flex;align-items:center;}
.search-toggle{
  width:36px;height:36px;
  display:grid;place-items:center;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  background:transparent;
  color:var(--text-2);
  cursor:pointer;
  transition:all var(--ease);
}
.search-toggle:hover{color:var(--accent);border-color:rgba(120,190,255,.28);}
.search-input{
  width:0;height:36px;
  padding:0;
  opacity:0;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  background:rgba(255,255,255,.04);
  color:var(--text);
  font-size:14px;
  transition:width 220ms ease-out,opacity 220ms ease-out,padding 220ms ease-out,border-color var(--ease);
}
.search-input::placeholder{color:var(--text-3);}
.search-input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(35,162,255,.18);
}
.nav-search.is-open .search-input{
  width:200px;opacity:1;padding:0 12px;margin-left:8px;
  border-color:rgba(120,190,255,.28);
}

.nav-burger{
  display:none;
  width:40px;height:40px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid rgba(120,190,255,.22);
  border-radius:var(--radius-btn);
  background:rgba(255,255,255,.03);
  cursor:pointer;
  padding:0;
}
.nav-burger span{
  display:block;
  width:18px;height:2px;border-radius:2px;
  background:var(--text);
  transition:transform 200ms ease-out,opacity 200ms ease-out;
}
.site-header.is-drawer-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.site-header.is-drawer-open .nav-burger span:nth-child(2){opacity:0;}
.site-header.is-drawer-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- buttons ---------- */
.rl-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  text-decoration:none;
  transition:all var(--ease);
}
.rl-btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121F;
  box-shadow:0 0 18px -4px rgba(35,162,255,.55);
}
.rl-btn--primary:hover{
  color:#04121F;
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 26px -4px rgba(35,162,255,.7);
}
.rl-btn--primary:active{transform:translateY(-1px);}
.rl-btn--ghost{
  background:transparent;
  border-color:rgba(120,190,255,.28);
  color:var(--text);
}
.rl-btn--ghost:hover{
  color:var(--accent);
  border-color:var(--accent);
  transform:translateY(-2px);
}
.rl-btn--sm{padding:8px 16px;font-size:14px;}

.to-top{font-size:13px;color:var(--text-2);}
.to-top:hover{color:var(--accent);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:148px 0 76px;
  background:var(--sec-a);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 28% 0%,#000,transparent 72%);
  mask-image:radial-gradient(circle at 28% 0%,#000,transparent 72%);
  pointer-events:none;
}
.page-hero__glow{
  position:absolute;
  top:-180px;right:-140px;
  width:560px;height:560px;
  background:radial-gradient(circle,rgba(35,162,255,.12),transparent 66%);
  pointer-events:none;
}
.page-hero .rl-container{position:relative;z-index:2;}

.hero-tag{
  display:inline-block;
  margin-bottom:18px;
  padding:5px 12px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
  border:1px solid rgba(47,227,196,.35);
  border-radius:var(--radius-badge);
  background:rgba(47,227,196,.07);
}
.page-hero h1{
  font-size:clamp(28px,4.4vw,50px);
  line-height:1.22;
  margin-bottom:20px;
}
.hero-lead{
  max-width:620px;
  font-size:17px;
  color:var(--text-2);
  line-height:1.85;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 24px;}
.hero-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-3);
}
.hero-points li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px -1px rgba(47,227,196,.8);
}
.hero-figure{
  position:relative;
  margin:0;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.hero-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  filter:saturate(.95) brightness(.88);
}
.hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(7,12,20,.6),rgba(7,12,20,.12) 58%,rgba(35,162,255,.3));
  pointer-events:none;
}

/* ---------- sections ---------- */
.rl-section{padding:96px 0;}
.rl-section--alt{background:var(--sec-b);}
.rl-section--panel{background:var(--sec-a);}

.section-head{max-width:860px;margin-bottom:40px;}
.section-head__label{
  display:inline-block;
  margin-bottom:14px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
  font-family:Inter,"SFMono-Regular",Consolas,monospace;
}
.faq-block__title{
  position:relative;
  padding-left:18px;
  font-size:clamp(22px,2.8vw,30px);
  margin-bottom:14px;
}
.faq-block__title::before{
  content:"";
  position:absolute;
  left:0;top:.18em;bottom:.18em;
  width:4px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 12px -2px rgba(47,227,196,.75);
}
.faq-block__desc{
  max-width:800px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
  margin:0;
}
.faq-block + .faq-block{margin-top:72px;}

/* ---------- faq ---------- */
.faq-list{
  margin-top:26px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:16px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  transition:background var(--ease),color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:rgba(255,255,255,.03);color:var(--primary);}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  width:24px;height:24px;
  display:grid;place-items:center;
  font-size:18px;
  font-weight:400;
  line-height:1;
  color:var(--accent);
  border:1px solid rgba(47,227,196,.35);
  border-radius:50%;
  transition:transform var(--ease),background var(--ease);
}
.faq-item[open] summary{color:var(--primary);}
.faq-item[open] summary::after{
  content:"−";
  transform:rotate(180deg);
  background:rgba(47,227,196,.1);
}
.faq-item__body{
  padding:0 22px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  animation:faqIn 180ms ease-out;
}
.faq-item__body p{margin:0 0 .8em;}
.faq-item__body p:last-child{margin-bottom:0;}
@keyframes faqIn{
  from{opacity:0;transform:translateY(-4px);}
  to{opacity:1;transform:translateY(0);}
}

/* ---------- note band ---------- */
.note-band{
  position:relative;
  margin-top:8px;
  padding:32px 32px 32px 34px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.note-band::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--warn);
}
.note-band__label{
  display:inline-block;
  margin-bottom:14px;
  padding:4px 10px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--warn);
  border:1px solid rgba(255,180,92,.35);
  border-radius:var(--radius-badge);
  background:rgba(255,180,92,.08);
}
.note-band h2{
  font-size:clamp(20px,2.4vw,26px);
  margin-bottom:16px;
}
.note-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.note-list li{
  padding:18px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.07);
  background:rgba(255,255,255,.025);
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}
.note-list strong{
  display:block;
  margin-bottom:6px;
  font-size:15px;
  font-weight:600;
  color:var(--text);
}

/* ---------- cta ---------- */
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:40px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(35,162,255,.12),rgba(47,227,196,.06) 70%,rgba(11,19,31,.4));
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 80% 120%,#000,transparent 70%);
  mask-image:radial-gradient(circle at 80% 120%,#000,transparent 70%);
  pointer-events:none;
}
.cta-band__text{position:relative;z-index:2;max-width:660px;}
.cta-band__text h2{font-size:clamp(21px,2.6vw,28px);margin-bottom:12px;}
.cta-band__text p{font-size:15px;color:var(--text-2);margin:0;}
.cta-band__action{position:relative;z-index:2;display:flex;flex-direction:column;align-items:flex-end;gap:12px;}
.cta-band__note{font-size:13px;color:var(--text-3);}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:0;
  padding:64px 0 28px;
  background:var(--panel);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,var(--accent),rgba(47,227,196,0));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line-soft);
}
.footer-brand__logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand p{
  font-size:14px;
  line-height:1.85;
  color:var(--text-3);
  max-width:340px;
  margin:0;
}
.footer-col h4{
  font-size:15px;
  margin-bottom:16px;
  color:var(--text);
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  font-size:14px;
  color:var(--text-3);
  text-decoration:none;
}
.footer-col a:hover{color:var(--accent);}
.footer-col p{
  font-size:14px;
  line-height:1.8;
  color:var(--text-3);
  margin:0 0 10px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:22px;
}
.footer-bottom p{
  margin:0;
  font-size:13px;
  color:var(--text-3);
}

/* ---------- backdrop-filter fallback ---------- */
@supports not ((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .faq-list,
  .note-band{background:rgba(11,19,31,.94);}
  .site-header.is-scrolled{background:rgba(11,19,31,.96);}
}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .site-header{height:56px;}
  .nav-left{gap:16px;}
  .nav-links{
    position:fixed;
    top:0;left:0;right:0;
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:80px 24px 40px;
    background:rgba(9,15,25,.97);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    transform:translateY(-100%);
    transition:transform 260ms ease-out;
    overflow-y:auto;
    z-index:110;
  }
  .nav-links.is-open{transform:translateY(0);}
  .nav-link{
    height:52px;
    padding:0 4px;
    font-size:16px;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .nav-link.is-active::after{left:4px;right:auto;width:26px;bottom:8px;}
  .nav-search{display:none;}
  .nav-burger{display:flex;}
  .rl-section{padding:72px 0;}
  .page-hero{padding:120px 0 60px;}
  .note-list{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
  .cta-band__action{align-items:flex-start;}
}

@media(max-width:600px){
  .rl-container{padding:0 16px;}
  .brand__text{font-size:14px;}
  .brand__text strong{font-size:16px;}
  .brand__mark{width:26px;height:26px;font-size:12px;}
  .rl-btn{padding:10px 18px;font-size:14px;min-height:44px;}
  .rl-btn--sm{padding:8px 14px;font-size:13px;}
  .rl-section{padding:56px 0;}
  .page-hero{padding:104px 0 48px;}
  .page-hero h1{font-size:clamp(24px,7vw,32px);}
  .hero-lead{font-size:15px;}
  .hero-actions{gap:10px;}
  .faq-item summary{padding:14px 16px;font-size:15px;}
  .faq-item__body{padding:0 16px 18px;font-size:14px;}
  .note-band{padding:24px 20px 24px 22px;}
  .note-list li{padding:16px;}
  .cta-band{padding:26px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
}

@media(max-width:380px){
  .brand__text{display:none;}
}