/* roulang page: index */
:root{
    --canvas:#060A14;
    --panel:#0E1526;
    --raised:#131C33;
    --primary:#2FD8C0;
    --secondary:#7B61FF;
    --accent:#FFB347;
    --ink:#E6ECF5;
    --mute:#9AA7BD;
    --faint:#6C7893;
    --line:rgba(255,255,255,.08);
    --line-soft:rgba(255,255,255,.06);
    --r-block:20px;
    --r-card:16px;
    --r-ctl:12px;
    --shadow-card:0 18px 50px rgba(0,0,0,.45);
    --shadow-pop:0 28px 80px rgba(0,0,0,.55);
    --glow-primary:0 10px 34px rgba(47,216,192,.28);
    --sidebar:240px;
    --sidebar-sm:72px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background-color:var(--canvas);
    color:var(--ink);
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    font-weight:400;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input,textarea{font:inherit;color:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  ::selection{background:rgba(47,216,192,.28);}
  :focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px;}

  .num{font-variant-numeric:tabular-nums;font-feature-settings:'tnum';}

  /* 背景网格与光晕 */
  .page-deco{position:fixed;inset:0;pointer-events:none;z-index:0;}
  .page-deco .grid-lines{
    position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
    background-size:40px 40px;
    opacity:.9;
  }
  .page-deco .halo-a{
    position:absolute;top:-200px;left:-140px;width:560px;height:560px;border-radius:50%;
    background:radial-gradient(circle,rgba(47,216,192,.11),transparent 66%);
  }
  .page-deco .halo-b{
    position:absolute;bottom:-220px;right:-160px;width:600px;height:600px;border-radius:50%;
    background:radial-gradient(circle,rgba(123,97,255,.10),transparent 66%);
  }

  /* 布局容器 */
  .shell-main{position:relative;z-index:1;}
  @media (min-width:1024px){
    .shell-main{margin-left:var(--sidebar-sm);}
  }
  @media (min-width:1280px){
    .shell-main{margin-left:var(--sidebar);}
  }
  .wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 20px;}
  @media (min-width:768px){.wrap{padding:0 32px;}}
  @media (min-width:1280px){.wrap{padding:0 48px;}}

  /* 玻璃拟态（仅导航 / Hero 主视觉卡 / 底部转化条 / 抽屉） */
  .glass{
    background:rgba(14,21,38,.72);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid var(--line);
  }

  /* 按钮体系 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
    min-height:44px;padding:.7rem 1.35rem;border-radius:var(--r-ctl);
    font-size:15px;font-weight:600;letter-spacing:.01em;
    transition:transform .18s ease,box-shadow .22s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background-image:linear-gradient(135deg,#2FD8C0 0%,#7B61FF 100%);
    color:#06131A;
    box-shadow:var(--glow-primary);
  }
  .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 44px rgba(47,216,192,.38);filter:brightness(1.06);}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 6px 20px rgba(47,216,192,.24);}
  .btn-primary:disabled{filter:saturate(.4);opacity:.55;box-shadow:none;cursor:not-allowed;}
  .btn-outline{
    border:1px solid rgba(255,255,255,.22);
    color:var(--ink);
    background:rgba(255,255,255,.02);
  }
  .btn-outline:hover{border-color:rgba(47,216,192,.5);background:rgba(47,216,192,.08);transform:translateY(-1px);}
  .btn-outline:active{transform:translateY(1px);}
  .btn-text{
    display:inline-flex;align-items:center;gap:.35rem;
    color:var(--primary);font-weight:600;font-size:14.5px;min-height:44px;
    border-bottom:1px solid transparent;
    transition:border-color .2s ease,color .2s ease,gap .2s ease;
  }
  .btn-text:hover{border-bottom-color:rgba(47,216,192,.6);gap:.55rem;}

  /* 卡片 */
  .card{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-card);
    transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  }
  .card-hover:hover{
    border-color:rgba(47,216,192,.4);
    transform:translateY(-2px);
    box-shadow:0 24px 60px rgba(0,0,0,.55);
  }

  /* 徽章 */
  .badge{
    display:inline-flex;align-items:center;gap:.3rem;
    padding:.2rem .7rem;border-radius:999px;
    font-size:12.5px;line-height:1.7;font-weight:600;
  }
  .badge-cat{background:rgba(123,97,255,.12);color:#B4A6FF;border:1px solid rgba(123,97,255,.25);}
  .badge-time{background:rgba(255,179,71,.12);color:#FFC978;border:1px solid rgba(255,179,71,.22);}

  /* 侧栏导航 */
  .side-link{
    position:relative;display:flex;align-items:center;gap:.75rem;
    min-height:48px;padding:.55rem .8rem;border-radius:var(--r-ctl);
    color:var(--mute);font-size:14.5px;font-weight:500;
    transition:color .2s ease,background-color .2s ease;
  }
  .side-link::before{
    content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:0;border-radius:0 3px 3px 0;background:var(--primary);
    transition:height .22s ease;
  }
  .side-link:hover{color:var(--ink);background:rgba(255,255,255,.045);}
  .side-link.is-active{color:var(--ink);background:rgba(47,216,192,.09);box-shadow:inset 0 0 22px rgba(47,216,192,.08);}
  .side-link.is-active::before{height:60%;}
  .side-link .ic{width:20px;height:20px;flex:0 0 20px;display:grid;place-items:center;color:currentColor;}

  /* 列表项 */
  .row-link{
    display:flex;align-items:center;justify-content:space-between;gap:1rem;
    min-height:48px;padding:.6rem .85rem;border-radius:var(--r-ctl);
    border-left:2px solid transparent;color:var(--mute);font-size:14.5px;
    transition:border-color .2s ease,color .2s ease,background-color .2s ease;
  }
  .row-link:hover{border-left-color:var(--primary);color:var(--ink);background:rgba(255,255,255,.04);}

  /* Hero */
  .hero-visual{
    position:relative;border-radius:var(--r-block);overflow:hidden;
    box-shadow:var(--shadow-pop);
  }
  .hero-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
  .hero-visual .toolbar{
    position:absolute;top:0;left:0;right:0;height:38px;
    background:rgba(6,10,20,.7);backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    display:flex;align-items:center;gap:6px;padding:0 14px;
  }
  .hero-visual .dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.18);}

  /* 场景演示截图位 */
  .shot{
    border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
    box-shadow:var(--shadow-card);background:var(--panel);
  }
  .shot-bar{
    height:34px;display:flex;align-items:center;gap:6px;padding:0 12px;
    background:rgba(255,255,255,.035);border-bottom:1px solid var(--line-soft);
  }
  .shot-bar i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.16);display:block;}

  /* 时间轴 */
  .step{position:relative;padding-left:28px;padding-bottom:26px;}
  .step:last-child{padding-bottom:0;}
  .step::before{
    content:'';position:absolute;left:5px;top:14px;bottom:0;width:1px;background:rgba(255,255,255,.12);
  }
  .step:last-child::before{display:none;}
  .step::after{
    content:'';position:absolute;left:0;top:8px;width:11px;height:11px;border-radius:50%;
    background:var(--primary);box-shadow:0 0 0 4px rgba(47,216,192,.14);
  }
  .step h3{font-size:17px;font-weight:600;margin-bottom:.3rem;}
  .step p{color:var(--mute);font-size:15px;}

  /* FAQ 手风琴 */
  .faq-item{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;transition:border-color .2s ease;
  }
  .faq-item.is-open{border-color:rgba(47,216,192,.35);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;
    padding:1.05rem 1.2rem;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
    min-height:56px;
  }
  .faq-q .arw{transition:transform .18s ease;color:var(--faint);flex:0 0 auto;}
  .faq-item.is-open .faq-q .arw{transform:rotate(180deg);color:var(--primary);}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .18s ease;
    border-left:2px solid transparent;
  }
  .faq-item.is-open .faq-a{max-height:420px;border-left-color:var(--primary);}
  .faq-a p{padding:0 1.2rem 1.15rem 1.2rem;color:var(--mute);font-size:15.5px;line-height:1.8;}

  /* 跑马灯 */
  .rail{
    display:flex;gap:16px;overflow-x:auto;padding:.35rem .2rem 1rem;
    scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  }
  .rail::-webkit-scrollbar{height:6px;}
  .rail::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:999px;}
  .rail > *{scroll-snap-align:start;flex:0 0 auto;}
  .quote-card{
    width:300px;padding:1.1rem 1.2rem;border-radius:var(--r-card);
    background:rgba(19,28,51,.72);border:1px solid var(--line);
    backdrop-filter:blur(10px);
  }
  @media (max-width:520px){.quote-card{width:76vw;}}

  /* 序号水印 */
  .wm-num{
    font-size:64px;line-height:1;font-weight:700;letter-spacing:-.03em;
    color:rgba(255,255,255,.05);font-variant-numeric:tabular-nums;
  }

  /* 空态 */
  .empty-box{
    display:flex;flex-direction:column;align-items:center;text-align:center;
    padding:3rem 1.5rem;border:1px dashed rgba(255,255,255,.14);border-radius:var(--r-card);
    background:rgba(14,21,38,.6);
  }
  .empty-icon{
    width:64px;height:64px;border-radius:18px;border:1px solid var(--line);
    background:rgba(47,216,192,.07);position:relative;margin-bottom:1rem;
  }
  .empty-icon::before,.empty-icon::after{content:'';position:absolute;background:rgba(47,216,192,.5);}
  .empty-icon::before{left:16px;right:16px;top:31px;height:2px;border-radius:2px;}
  .empty-icon::after{top:16px;bottom:16px;left:31px;width:2px;border-radius:2px;}

  /* 图片占位 */
  .ph{background:linear-gradient(135deg,#101a2e,#0b1322);display:grid;place-items:center;color:var(--faint);border-bottom:1px solid var(--line-soft);}

  /* 移动端底部转化条 */
  .mobile-cta{
    position:fixed;left:0;right:0;bottom:0;z-index:60;
    display:flex;align-items:center;justify-content:space-between;gap:.75rem;
    padding:.6rem .9rem calc(.6rem + env(safe-area-inset-bottom));
    background:rgba(11,17,32,.86);backdrop-filter:blur(14px);
    border-top:1px solid rgba(47,216,192,.28);
    box-shadow:0 -8px 30px rgba(47,216,192,.12);
  }
  @media (min-width:768px){.mobile-cta{display:none;}}
  body{padding-bottom:0;}
  @media (max-width:767px){body{padding-bottom:76px;}}

  /* 顶部移动栏 */
  .topbar{
    position:fixed;top:0;left:0;right:0;z-index:70;
    display:flex;align-items:center;justify-content:space-between;
    height:60px;padding:0 16px;
    background:rgba(9,14,26,.82);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:height .22s ease;
  }
  .topbar.shrink{height:54px;}
  @media (min-width:1024px){.topbar{display:none;}}
  @media (max-width:1023px){.shell-main{padding-top:60px;}}

  .drawer{
    position:fixed;top:0;bottom:0;left:0;width:280px;max-width:86vw;z-index:90;
    background:rgba(10,16,30,.96);backdrop-filter:blur(16px);
    border-right:1px solid var(--line);
    transform:translateX(-102%);transition:transform .24s ease;
    padding:20px 16px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0);}
  .scrim{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:80;
    opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
  }
  .scrim.is-open{opacity:1;visibility:visible;}

  /* 桌面侧栏 */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:80;
    width:var(--sidebar-sm);
    background:rgba(12,18,33,.82);backdrop-filter:blur(14px);
    border-right:1px solid var(--line);
    display:flex;flex-direction:column;
    padding:18px 12px;overflow-y:auto;
  }
  @media (min-width:1280px){.sidebar{width:var(--sidebar);padding:22px 18px;}}
  @media (max-width:1023px){.sidebar{display:none;}}
  .sidebar .label{display:none;}
  @media (min-width:1280px){.sidebar .label{display:block;}}
  .sidebar .only-wide{display:none;}
  @media (min-width:1280px){.sidebar .only-wide{display:block;}}
  .sidebar .only-sm{display:grid;place-items:center;}
  @media (min-width:1280px){.sidebar .only-sm{display:none;}}

  .section{padding:72px 0;}
  @media (max-width:767px){.section{padding:52px 0;}}

  .divider{height:1px;background:var(--line-soft);border:0;}

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    *{animation:none !important;transition-duration:.01ms !important;}
  }

/* roulang page: article */
:root{
  --canvas:#060A14;
  --layer:#0E1526;
  --raise:#131C33;
  --primary:#2FD8C0;
  --secondary:#7B61FF;
  --accent:#FFB347;
  --ink:#E6ECF5;
  --mute:#9AA7BD;
  --faint:#6C7893;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.06);
  --ok:#3BD68C;
  --warn:#FF7A5A;
  --danger:#FF5C6E;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow-card:0 18px 50px rgba(0,0,0,.45);
  --shadow-pop:0 28px 80px rgba(0,0,0,.55);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;background:var(--canvas);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.75;font-weight:400;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{list-style:none;padding:0}
::selection{background:rgba(47,216,192,.28)}
:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px;border-radius:6px}

body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.55;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:radial-gradient(circle at 28% 8%,#000 0%,transparent 68%);
  mask-image:radial-gradient(circle at 28% 8%,#000 0%,transparent 68%);
}
body::after{
  content:"";position:fixed;left:-200px;top:-220px;width:660px;height:660px;border-radius:50%;
  pointer-events:none;z-index:0;filter:blur(24px);
  background:radial-gradient(circle,rgba(47,216,192,.12),transparent 68%);
}

/* ---------- 容器 ---------- */
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 48px;position:relative;z-index:1}
@media (max-width:1279px){.wrap{padding:0 32px}}
@media (max-width:639px){.wrap{padding:0 20px}}

/* ---------- 左侧 App Shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:90;
  display:flex;flex-direction:column;
  padding:24px 16px;overflow-y:auto;
  background:rgba(12,19,34,.82);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border-right:1px solid var(--line);
  transition:transform .26s ease,width .26s ease;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:999px}
.main{margin-left:240px;transition:margin-left .26s ease;position:relative;z-index:1}

.brand{display:flex;align-items:center;gap:12px;padding:4px;min-height:44px}
.brand-mark{
  width:40px;height:40px;flex:none;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#061019;letter-spacing:.5px;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{font-size:16px;font-weight:700;line-height:1.25;color:var(--ink);white-space:nowrap}
.brand-sub{font-size:12px;color:var(--faint);line-height:1.4;margin-top:2px;white-space:nowrap}

.side-link{
  display:flex;align-items:center;gap:12px;min-height:44px;padding:8px 12px;
  border-radius:var(--r-sm);color:var(--mute);font-size:14.5px;font-weight:500;
  border-left:3px solid transparent;
  transition:background .18s,color .18s,border-color .18s,box-shadow .18s;
}
.side-link .ic{display:grid;place-items:center;width:22px;height:22px;flex:none}
.side-link .label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--ink)}
.side-link.is-active{
  color:var(--ink);background:rgba(47,216,192,.10);
  border-left-color:var(--primary);
  box-shadow:inset 0 0 22px rgba(47,216,192,.10);
}
.side-note{font-size:12.5px;line-height:1.75;color:var(--faint)}

/* ---------- 顶部移动栏 ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;height:58px;z-index:80;
  display:none;align-items:center;justify-content:space-between;
  padding:0 18px;
  background:rgba(10,16,30,.82);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  transition:height .2s ease,background .2s ease;
}
.topbar.scrolled{height:50px;background:rgba(8,13,25,.95)}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;border-radius:12px;
  border:1px solid var(--line);color:var(--ink);background:rgba(255,255,255,.03);
  transition:background .18s,border-color .18s,transform .18s;
}
.icon-btn:hover{border-color:rgba(47,216,192,.5);background:rgba(47,216,192,.1)}
.icon-btn:active{transform:translateY(1px)}

.overlay{
  position:fixed;inset:0;z-index:95;background:rgba(0,0,0,.6);
  opacity:0;pointer-events:none;transition:opacity .25s ease;
}
.overlay.show{opacity:1;pointer-events:auto}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;color:#08131F;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
  box-shadow:0 10px 34px rgba(47,216,192,.28);
  transition:box-shadow .2s,transform .2s,filter .2s;
}
.btn-primary:hover{box-shadow:0 16px 46px rgba(47,216,192,.4);filter:brightness(1.06);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 8px 22px rgba(47,216,192,.24)}
.btn-primary:disabled{filter:saturate(.35) brightness(.75);box-shadow:none;cursor:not-allowed}

.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.18);color:var(--ink);
  font-size:15px;font-weight:600;background:transparent;
  transition:border-color .2s,background .2s,transform .2s,color .2s;
}
.btn-secondary:hover{border-color:rgba(47,216,192,.55);background:rgba(47,216,192,.08);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}

.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 4px;
  font-size:15px;font-weight:600;color:var(--mute);
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
}
.btn-ghost:hover{color:var(--primary);border-bottom-color:rgba(47,216,192,.5)}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;min-height:44px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.link-arrow::after{content:"›";transition:transform .18s}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 面包屑 / 元信息 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--faint)}
.breadcrumb a{color:var(--faint);transition:color .18s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.45}
.breadcrumb .now{color:var(--ink);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.meta-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;font-size:13.5px;color:var(--faint)}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 11px;border-radius:999px;font-size:12.5px;font-weight:500;line-height:1.7;
}
.badge-cat{background:rgba(123,97,255,.12);color:#A99BFF;border:1px solid rgba(123,97,255,.25)}
.badge-time{background:rgba(255,179,71,.12);color:var(--accent);border:1px solid rgba(255,179,71,.25)}

.divider{border:0;border-top:1px solid var(--line-soft);margin:0}

/* ---------- 正文排版 ---------- */
.content-body{font-size:17px;line-height:1.85;color:#D6E0EE;max-width:820px}
.content-body > *:first-child{margin-top:0}
.content-body p{margin:0 0 1.15em}
.content-body h2{
  font-size:26px;font-weight:700;color:var(--ink);line-height:1.4;
  margin:2.2em 0 .8em;padding-left:14px;border-left:4px solid var(--primary);
  scroll-margin-top:80px;
}
.content-body h3{
  font-size:20px;font-weight:600;color:var(--ink);line-height:1.5;
  margin:1.8em 0 .6em;scroll-margin-top:80px;
}
.content-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:1.5em 0 .5em}
.content-body ul,.content-body ol{margin:0 0 1.15em;padding-left:1.35em}
.content-body ul{list-style:disc}
.content-body ol{list-style:decimal}
.content-body li{margin:.45em 0}
.content-body li::marker{color:var(--primary)}
.content-body blockquote{
  margin:1.5em 0;padding:14px 18px;border-radius:0 var(--r-sm) var(--r-sm) 0;
  border-left:3px solid var(--primary);background:rgba(47,216,192,.06);color:#C7D3E4;
}
.content-body blockquote p:last-child{margin-bottom:0}
.content-body img{border-radius:var(--r-md);border:1px solid var(--line);margin:1.4em 0}
.content-body a{color:var(--primary);border-bottom:1px solid rgba(47,216,192,.35);transition:border-color .18s}
.content-body a:hover{border-bottom-color:var(--primary)}
.content-body strong{color:var(--ink);font-weight:600}
.content-body code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;font-size:.92em}
.content-body pre{
  background:var(--layer);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:16px;overflow-x:auto;margin:1.4em 0;font-size:14px;line-height:1.7;
}
.content-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px}
.content-body th,.content-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.content-body th{background:var(--raise);color:var(--ink);font-weight:600}
.content-body hr{border:0;border-top:1px solid var(--line-soft);margin:2em 0}

/* ---------- 侧栏 ---------- */
.panel{background:var(--layer);border:1px solid var(--line);border-radius:var(--r-md);padding:18px}
.panel-title{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:10px}
.toc-list li a{
  display:block;padding:8px 10px;border-radius:10px;min-height:44px;
  color:var(--mute);font-size:14px;line-height:1.6;
  border-left:2px solid transparent;
  display:flex;align-items:center;
  transition:background .18s,color .18s,border-color .18s;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-list li a:hover{color:var(--ink);background:rgba(255,255,255,.04);border-left-color:var(--primary)}
.toc-list li a.is-sub{padding-left:24px;font-size:13.5px;color:var(--faint)}

.row-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:44px;padding:8px 12px;border-radius:10px;
  color:var(--mute);font-size:14.5px;
  border-left:2px solid transparent;
  transition:background .18s,color .18s,border-color .18s;
}
.row-link:hover{color:var(--ink);background:rgba(255,255,255,.05);border-left-color:var(--primary)}
.row-link::after{content:"›";color:var(--primary);opacity:0;transform:translateX(-4px);transition:.18s}
.row-link:hover::after{opacity:1;transform:translateX(0)}

@media (min-width:1024px){
  .aside-sticky{position:sticky;top:24px}
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--layer);border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.card:hover{border-color:rgba(47,216,192,.4);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--raise);border-radius:var(--r-md) var(--r-md) 0 0}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.02)}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:16px;
  padding:56px 24px;text-align:center;
  background:var(--layer);border:1px solid var(--line);border-radius:var(--r-lg);
}
.empty-ico{
  width:64px;height:64px;border-radius:18px;display:grid;place-items:center;
  border:1px dashed rgba(255,255,255,.2);color:var(--faint);
}

/* ---------- 响应式折叠 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  .sidebar{width:72px;padding:20px 10px;align-items:center}
  .sidebar .brand-text,
  .sidebar .side-link .label,
  .sidebar .side-note,
  .sidebar .side-cta .cta-text{display:none}
  .sidebar .side-link{justify-content:center;padding:8px;border-left:0;width:44px}
  .sidebar .side-link.is-active{box-shadow:inset 0 0 20px rgba(47,216,192,.16)}
  .sidebar .side-cta{width:44px;padding:0;min-height:44px}
  .sidebar .side-cta::after{content:"→";font-size:16px;line-height:1}
  .main{margin-left:72px}
}
@media (max-width:1023px){
  .sidebar{width:276px;padding:22px 16px;z-index:100;transform:translateX(-100%)}
  .sidebar.is-open{transform:translateX(0)}
  .main{margin-left:0;padding-top:58px}
  .topbar{display:flex}
}
@media (max-width:639px){
  .content-body{font-size:16px;line-height:1.85}
  .content-body h2{font-size:22px}
  .content-body h3{font-size:18px}
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
    --canvas:#060A14;
    --surface:#0E1526;
    --raised:#131C33;
    --primary:#2FD8C0;
    --secondary:#7B61FF;
    --accent:#FFB347;
    --ink:#E6ECF5;
    --mute:#9AA7BD;
    --faint:#6C7893;
    --line:rgba(255,255,255,.08);
    --line-soft:rgba(255,255,255,.06);
    --success:#3BD68C;
    --warn:#FF7A5A;
    --error:#FF5C6E;
    --r-lg:20px;
    --r-md:16px;
    --r-sm:12px;
    --shadow-card:0 18px 50px rgba(0,0,0,.45);
    --shadow-float:0 28px 80px rgba(0,0,0,.55);
    --sidebar-w:240px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--canvas);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.7;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
    background-size:40px 40px;
    opacity:.65;
  }
  body::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background:
      radial-gradient(620px 420px at 6% 4%,rgba(47,216,192,.10),transparent 62%),
      radial-gradient(560px 460px at 98% 96%,rgba(123,97,255,.09),transparent 64%);
  }

  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul{list-style:none;padding:0;}

  a:focus-visible,button:focus-visible{
    outline:2px solid rgba(47,216,192,.55);
    outline-offset:2px;
    border-radius:8px;
  }

  /* ---------- 布局骨架 ---------- */
  .main{
    margin-left:var(--sidebar-w);
    position:relative;
    z-index:1;
    min-height:100vh;
  }
  .wrap{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:48px;
    padding-right:48px;
  }

  /* ---------- 左侧导航 ---------- */
  .app-shell{
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    width:var(--sidebar-w);
    z-index:55;
    display:flex;
    flex-direction:column;
    gap:16px;
    padding:22px 16px;
    background:rgba(10,16,30,.76);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    border-right:1px solid var(--line-soft);
    transition:transform .28s ease;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:11px;
    padding:4px 8px 16px;
  }
  .brand-mark{
    width:38px;
    height:38px;
    flex:0 0 38px;
    border-radius:12px;
    display:grid;
    place-items:center;
    font-size:13px;
    font-weight:800;
    letter-spacing:.02em;
    color:#04121A;
    background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
    box-shadow:0 8px 24px rgba(47,216,192,.25);
  }
  .brand-text{
    font-size:16px;
    font-weight:700;
    white-space:nowrap;
  }
  .side-link{
    position:relative;
    display:flex;
    align-items:center;
    gap:12px;
    min-height:44px;
    padding:11px 12px;
    border-radius:12px;
    color:var(--mute);
    font-size:14.5px;
    transition:background .2s,color .2s;
  }
  .side-link .ic{
    width:18px;
    height:18px;
    flex:0 0 18px;
    display:grid;
    place-items:center;
    opacity:.92;
  }
  .side-link .label{white-space:nowrap;}
  .side-link:hover{
    background:rgba(255,255,255,.045);
    color:var(--ink);
  }
  .side-link.is-active{
    color:var(--ink);
    background:rgba(47,216,192,.10);
  }
  .side-link.is-active::before{
    content:"";
    position:absolute;
    left:0;
    top:50%;
    transform:translateY(-50%);
    width:3px;
    height:20px;
    border-radius:3px;
    background:var(--primary);
    box-shadow:0 0 12px rgba(47,216,192,.7);
  }
  .side-foot{margin-top:auto;}
  .side-note{color:var(--faint);}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:46px;
    padding:0 22px;
    border-radius:var(--r-sm);
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    cursor:pointer;
    transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,filter .18s ease;
  }
  .btn-primary{
    color:#04121A;
    background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
    box-shadow:0 10px 34px rgba(47,216,192,.28);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    filter:brightness(1.06);
    box-shadow:0 14px 44px rgba(47,216,192,.38);
  }
  .btn-primary:active{transform:translateY(1px);}
  .btn-outline{
    color:var(--ink);
    border-color:var(--line);
    background:transparent;
  }
  .btn-outline:hover{
    border-color:rgba(47,216,192,.45);
    background:rgba(47,216,192,.06);
  }
  .btn-outline:active{transform:translateY(1px);}
  .btn-ghost{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--primary);
    font-size:14.5px;
    font-weight:600;
    min-height:44px;
    transition:color .18s ease;
  }
  .btn-ghost:hover{text-decoration:underline;text-underline-offset:4px;}
  .btn:disabled,.btn[disabled]{
    opacity:.5;
    filter:saturate(.5);
    box-shadow:none;
    cursor:not-allowed;
  }
  .icon-btn{
    width:40px;
    height:40px;
    display:grid;
    place-items:center;
    border-radius:12px;
    border:1px solid var(--line);
    color:var(--mute);
    transition:color .2s,border-color .2s,background-color .2s;
  }
  .icon-btn:hover{
    color:var(--ink);
    border-color:rgba(47,216,192,.4);
    background:rgba(47,216,192,.07);
  }

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:999px;
    font-size:12.5px;
    line-height:1.6;
    color:#B9ABFF;
    background:rgba(123,97,255,.14);
    border:1px solid rgba(123,97,255,.26);
  }
  .badge-accent{
    color:#FFC978;
    background:rgba(255,179,71,.13);
    border-color:rgba(255,179,71,.26);
  }

  /* ---------- 面包屑 ---------- */
  .crumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:12.5px;
    color:var(--faint);
  }
  .crumb a{color:var(--mute);transition:color .18s;}
  .crumb a:hover{color:var(--primary);}
  .crumb .sep{opacity:.5;}
  .crumb .current{color:var(--ink);}

  /* ---------- 页头 ---------- */
  .page-hero{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-lg);
    border:1px solid var(--line);
    min-height:300px;
    display:flex;
    align-items:flex-end;
    padding:36px;
    box-shadow:var(--shadow-card);
    background:#0B111F;
  }
  .hero-bg{
    position:absolute;
    inset:0;
    width:100%;
    height:100%;
    object-fit:cover;
    opacity:.38;
  }
  .hero-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(6,10,20,.34) 0%,rgba(6,10,20,.86) 60%,rgba(6,10,20,.96) 100%);
  }
  .hero-inner{position:relative;z-index:3;width:100%;}
  .hero-title{
    margin-top:16px;
    font-size:clamp(28px,3.4vw,42px);
    font-weight:700;
    line-height:1.25;
    letter-spacing:.01em;
    max-width:800px;
  }
  .hero-sub{
    margin-top:14px;
    color:var(--mute);
    font-size:15.5px;
    max-width:660px;
  }

  /* ---------- 通用板块 ---------- */
  .section{margin-top:64px;}
  .h2{
    font-size:28px;
    font-weight:700;
    line-height:1.35;
    letter-spacing:.01em;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12.5px;
    letter-spacing:.08em;
    color:var(--primary);
    margin-bottom:12px;
  }
  .eyebrow::before{
    content:"";
    width:18px;
    height:1px;
    background:var(--primary);
    opacity:.7;
  }
  .p{
    margin-top:14px;
    color:var(--mute);
    font-size:15.5px;
    line-height:1.85;
  }
  .divider{
    border:0;
    height:1px;
    background:var(--line-soft);
  }

  /* ---------- 双栏图文 ---------- */
  .split{
    display:grid;
    grid-template-columns:5fr 7fr;
    gap:48px;
    align-items:center;
  }
  .split.reverse .split-text{order:2;}
  .split.reverse .split-media{order:1;}
  .media-frame{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    background:#0B111F;
    box-shadow:var(--shadow-card);
  }
  .media-frame img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
  }
  .media-frame::before{
    content:"";
    position:absolute;
    top:0;
    left:0;
    right:0;
    height:44px;
    z-index:2;
    pointer-events:none;
    background:linear-gradient(180deg,rgba(6,10,20,.82),rgba(6,10,20,0));
  }
  .media-frame::after{
    content:"";
    position:absolute;
    top:15px;
    left:16px;
    width:8px;
    height:8px;
    border-radius:50%;
    z-index:3;
    background:rgba(255,255,255,.20);
    box-shadow:15px 0 0 rgba(255,255,255,.20),30px 0 0 rgba(255,255,255,.20);
  }

  /* ---------- 勾选清单 ---------- */
  .check-list{margin-top:22px;}
  .check-list li{
    position:relative;
    padding-left:30px;
    margin-bottom:14px;
    color:var(--mute);
    font-size:15px;
    line-height:1.8;
  }
  .check-list li strong{
    color:var(--ink);
    font-weight:600;
  }
  .check-list li:last-child{margin-bottom:0;}
  .check-list li::before{
    content:"";
    position:absolute;
    left:0;
    top:.55em;
    width:14px;
    height:14px;
    border-radius:50%;
    border:1.5px solid rgba(47,216,192,.6);
  }
  .check-list li::after{
    content:"";
    position:absolute;
    left:4.5px;
    top:calc(.55em + 4.5px);
    width:5px;
    height:5px;
    border-radius:50%;
    background:var(--primary);
  }

  /* ---------- 要点卡 ---------- */
  .grid-2{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:22px;
  }
  .point-card{
    position:relative;
    overflow:hidden;
    padding:28px 26px;
    border-radius:var(--r-md);
    background:var(--surface);
    border:1px solid var(--line);
    transition:border-color .22s,transform .22s,box-shadow .22s;
  }
  .point-card:hover{
    border-color:rgba(47,216,192,.4);
    transform:translateY(-2px);
    box-shadow:var(--shadow-card);
  }
  .point-card .num{
    position:absolute;
    top:16px;
    right:20px;
    font-size:46px;
    font-weight:800;
    line-height:1;
    letter-spacing:-.02em;
    color:rgba(255,255,255,.045);
  }
  .point-card h3{
    font-size:18px;
    font-weight:600;
    line-height:1.5;
  }
  .point-card p{
    margin-top:10px;
    color:var(--mute);
    font-size:14.5px;
    line-height:1.8;
  }

  /* ---------- CTA 区块 ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-lg);
    border:1px solid rgba(47,216,192,.26);
    background:linear-gradient(135deg,rgba(47,216,192,.10),rgba(123,97,255,.10));
    padding:42px 38px;
    box-shadow:var(--shadow-card);
  }
  .cta-band::after{
    content:"";
    position:absolute;
    inset:0;
    pointer-events:none;
    background:radial-gradient(420px 260px at 88% 18%,rgba(47,216,192,.16),transparent 68%);
  }
  .cta-inner{position:relative;z-index:2;}

  /* ---------- 交叉链接 ---------- */
  .cross-links{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:0;
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line-soft);
  }
  .cross-links a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    min-height:64px;
    padding:14px 22px;
    color:var(--mute);
    font-size:15px;
    border-left:2px solid transparent;
    transition:color .2s,border-color .2s,background-color .2s;
  }
  .cross-links a:hover{
    color:var(--ink);
    border-left-color:var(--primary);
    background:rgba(255,255,255,.035);
  }
  .cross-links a .arrow{
    color:var(--faint);
    transition:transform .2s,color .2s;
  }
  .cross-links a:hover .arrow{
    color:var(--primary);
    transform:translateX(3px);
  }

  /* ---------- 页脚链接 ---------- */
  .row-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    min-height:44px;
    padding:10px 12px;
    border-left:2px solid transparent;
    border-radius:8px;
    color:var(--mute);
    font-size:14px;
    transition:color .18s,border-color .18s,background-color .18s;
  }
  .row-link:hover{
    color:var(--ink);
    border-left-color:var(--primary);
    background:rgba(255,255,255,.04);
  }
  .row-link::after{
    content:"›";
    color:var(--faint);
    opacity:.75;
  }

  /* ---------- 移动端顶部栏 / 抽屉 ---------- */
  .mobile-bar{display:none;}
  .overlay{
    position:fixed;
    inset:0;
    z-index:50;
    background:rgba(0,0,0,.6);
    opacity:0;
    visibility:hidden;
    transition:opacity .25s ease,visibility .25s ease;
  }
  .overlay.is-open{opacity:1;visibility:visible;}

  /* ---------- 移动端底部转化条 ---------- */
  .mobile-cta{display:none;}

  /* ---------- 响应式 ---------- */
  @media (min-width:1024px) and (max-width:1279px){
    :root{--sidebar-w:72px;}
    .app-shell{padding:22px 10px;}
    .brand{justify-content:center;padding:4px 0 16px;}
    .brand-text{display:none;}
    .side-link{justify-content:center;padding:12px 0;}
    .side-link .label{display:none;}
    .side-cta{padding:0;min-height:44px;width:44px;}
    .side-cta .cta-text{display:none;}
    .side-note{display:none;}
    .wrap{padding-left:32px;padding-right:32px;}
  }

  @media (max-width:1023px){
    .mobile-bar{
      display:flex;
      position:fixed;
      top:0;
      left:0;
      right:0;
      height:60px;
      z-index:48;
      align-items:center;
      justify-content:space-between;
      padding:0 16px;
      background:rgba(10,16,30,.84);
      -webkit-backdrop-filter:blur(16px);
      backdrop-filter:blur(16px);
      border-bottom:1px solid var(--line-soft);
    }
    .app-shell{
      width:272px;
      transform:translateX(-102%);
      background:rgba(8,13,25,.97);
      box-shadow:var(--shadow-float);
    }
    .app-shell.is-open{transform:translateX(0);}
    .main{
      margin-left:0;
      padding-top:60px;
    }
    .wrap{padding-left:32px;padding-right:32px;}
    .split{grid-template-columns:1fr;gap:26px;}
    .split .split-text{order:1;}
    .split .split-media{order:2;}
    .split.reverse .split-text{order:1;}
    .split.reverse .split-media{order:2;}
  }

  @media (max-width:767px){
    .wrap{padding-left:20px;padding-right:20px;}
    .section{margin-top:44px;}
    .h2{font-size:22px;}
    .p{font-size:15px;}
    .page-hero{min-height:260px;padding:24px 22px;border-radius:16px;}
    .grid-2{grid-template-columns:1fr;}
    .cross-links{grid-template-columns:1fr;}
    .cross-links a{border-bottom:1px solid var(--line-soft);}
    .cross-links a:last-child{border-bottom:0;}
    .cta-band{padding:28px 22px;}
    .check-list li{font-size:14.5px;}

    .mobile-cta{
      display:flex;
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:60;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      min-height:60px;
      padding:10px 16px;
      background:rgba(10,16,30,.88);
      -webkit-backdrop-filter:blur(16px);
      backdrop-filter:blur(16px);
      border-top:1px solid rgba(47,216,192,.25);
      box-shadow:0 -10px 30px rgba(0,0,0,.45);
    }
    .main{padding-bottom:76px;}
  }

  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;}
    html{scroll-behavior:auto;}
    .point-card:hover{transform:none;}
    .btn-primary:hover{transform:none;}
  }

/* roulang page: category2 */
:root{
    --canvas:#060A14;
    --layer:#0E1526;
    --raise:#131C33;
    --primary:#2FD8C0;
    --secondary:#7B61FF;
    --accent:#FFB347;
    --ink:#E6ECF5;
    --mute:#9AA7BD;
    --faint:#6C7893;
    --line:rgba(255,255,255,.08);
    --line-soft:rgba(255,255,255,.06);
    --r-block:20px;
    --r-card:16px;
    --r-ctl:12px;
    --shadow-card:0 18px 50px rgba(0,0,0,.45);
    --shadow-float:0 28px 80px rgba(0,0,0,.55);
    --sidebar:240px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    min-height:100%;
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background-color:var(--canvas);
    background-image:
      radial-gradient(900px 620px at 10% -6%, rgba(47,216,192,.10), transparent 62%),
      radial-gradient(820px 600px at 102% 102%, rgba(123,97,255,.10), transparent 64%),
      linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
    background-size:auto, auto, 40px 40px, 40px 40px;
    background-attachment:fixed;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  .num{font-variant-numeric:tabular-nums}

  .wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.wrap{padding:0 32px}}
  @media (min-width:1280px){.wrap{padding:0 48px}}

  /* ---------- 左侧 App Shell ---------- */
  .shell-side{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);z-index:60;
    display:flex;flex-direction:column;gap:14px;
    padding:22px 16px;overflow-y:auto;
    background:rgba(10,16,30,.78);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border-right:1px solid var(--line);
    transform:translateX(-100%);
    transition:transform .28s ease;
  }
  .shell-side.is-open{transform:translateX(0)}

  .brand{display:flex;align-items:center;gap:12px;padding:4px 6px 6px}
  .brand-mark{
    width:40px;height:40px;flex:0 0 40px;border-radius:12px;
    display:grid;place-items:center;
    font-size:14px;font-weight:700;letter-spacing:.02em;color:#04121A;
    background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
    box-shadow:0 10px 30px rgba(47,216,192,.22);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.25;overflow:hidden}
  .brand-text strong{font-size:16.5px;font-weight:700;color:var(--ink);white-space:nowrap}
  .brand-text em{font-style:normal;font-size:12px;color:var(--faint);white-space:nowrap;margin-top:2px}

  .side-link{
    position:relative;display:flex;align-items:center;gap:12px;
    min-height:48px;padding:11px 12px;border-radius:12px;
    font-size:14.5px;color:var(--mute);
    transition:background-color .18s ease,color .18s ease,box-shadow .18s ease;
  }
  .side-link .ic{display:grid;place-items:center;width:20px;height:20px;flex:0 0 20px;color:inherit}
  .side-link::before{
    content:'';position:absolute;left:-16px;top:50%;transform:translateY(-50%);
    width:3px;height:0;border-radius:0 3px 3px 0;background:var(--primary);
    box-shadow:0 0 12px rgba(47,216,192,.6);
    transition:height .2s ease;
  }
  .side-link:hover{color:var(--ink);background:rgba(255,255,255,.045)}
  .side-link:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}
  .side-link.is-active{
    color:var(--ink);
    background:rgba(47,216,192,.10);
    box-shadow:inset 0 0 0 1px rgba(47,216,192,.18),0 0 22px rgba(47,216,192,.08);
  }
  .side-link.is-active::before{height:22px}

  .side-divider{height:1px;background:var(--line-soft);margin:4px 6px}
  .side-note{font-size:12.5px;line-height:1.7;color:var(--faint);padding:0 6px;margin-top:auto}

  /* ---------- 顶部栏（移动端 / 平板） ---------- */
  .topbar{
    position:fixed;top:0;left:0;right:0;height:64px;z-index:55;
    display:flex;align-items:center;gap:12px;padding:0 16px;
    background:rgba(10,16,30,.78);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .topbar.is-scrolled{height:56px;background:rgba(8,13,25,.92)}
  .topbar-brand{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:700;color:var(--ink)}
  .brand-mark.sm{width:32px;height:32px;flex:0 0 32px;border-radius:10px;font-size:12px}
  .topbar .btn{margin-left:auto;height:40px;padding:0 16px;font-size:14px}

  .icon-btn{
    width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
    background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--ink);
    cursor:pointer;transition:background-color .18s ease,border-color .18s ease;
  }
  .icon-btn:hover{background:rgba(47,216,192,.10);border-color:rgba(47,216,192,.4)}
  .icon-btn:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}

  .scrim{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:58;
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  }
  .scrim.is-open{opacity:1;visibility:visible}

  /* ---------- 主内容区 ---------- */
  .main{margin-left:0;padding-top:64px;padding-bottom:40px}
  .page-hero{scroll-margin-top:88px}
  @media (min-width:1024px){
    .main{margin-left:72px;padding-top:0;padding-bottom:56px}
    .topbar{display:none}
    .shell-side{width:72px;padding:20px 10px;align-items:center;transform:none;gap:10px}
    .shell-side .brand{justify-content:center;padding:4px 0 8px}
    .shell-side .brand-text,
    .shell-side .side-link .label,
    .shell-side .side-note,
    .shell-side .side-divider,
    .shell-side .side-cta .cta-text{display:none}
    .shell-side .side-link{justify-content:center;width:48px;padding:12px 0;gap:0}
    .shell-side .side-link::before{display:none}
    .shell-side .side-cta{width:48px;padding:0;gap:0}
    .shell-side .side-link:hover .label{
      display:block;position:absolute;left:60px;top:50%;transform:translateY(-50%);
      background:var(--raise);border:1px solid var(--line);color:var(--ink);
      padding:6px 12px;border-radius:10px;white-space:nowrap;font-size:13px;
      box-shadow:var(--shadow-card);z-index:5;
    }
  }
  @media (min-width:1280px){
    .main{margin-left:var(--sidebar)}
    .shell-side{width:var(--sidebar);padding:22px 16px;align-items:stretch;transform:none;gap:14px}
    .shell-side .brand{justify-content:flex-start;padding:4px 6px 6px}
    .shell-side .brand-text,
    .shell-side .side-link .label,
    .shell-side .side-note,
    .shell-side .side-divider,
    .shell-side .side-cta .cta-text{display:block}
    .shell-side .side-link{justify-content:flex-start;width:auto;padding:11px 12px;gap:12px}
    .shell-side .side-link::before{display:block}
    .shell-side .side-cta{width:auto;padding:0 22px;gap:8px}
    .shell-side .side-link:hover .label{
      position:static;transform:none;background:none;border:0;box-shadow:none;padding:0;font-size:14.5px;
    }
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 22px;border-radius:var(--r-ctl);
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    border:1px solid transparent;cursor:pointer;
    transition:transform .18s ease,box-shadow .22s ease,filter .22s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn-primary{
    color:#04121A;
    background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
    box-shadow:0 10px 34px rgba(47,216,192,.28);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    filter:brightness(1.06);
    box-shadow:0 14px 46px rgba(47,216,192,.38);
  }
  .btn-primary:active{transform:translateY(1px);box-shadow:0 6px 20px rgba(47,216,192,.24)}
  .btn-primary:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}
  .btn-ghost{color:var(--ink);background:rgba(255,255,255,.02);border-color:var(--line)}
  .btn-ghost:hover{border-color:rgba(47,216,192,.45);background:rgba(47,216,192,.06);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-ghost:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}
  .btn[disabled],.btn.is-disabled{filter:saturate(.45) brightness(.85);box-shadow:none;cursor:not-allowed;transform:none}

  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
    color:var(--primary);border-bottom:1px solid transparent;
    transition:border-color .18s ease,color .18s ease,gap .18s ease;
  }
  .link-arrow:hover{border-color:rgba(47,216,192,.55);gap:10px}
  .link-arrow:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:3px;border-radius:4px}

  /* ---------- 徽章 ---------- */
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    font-size:12.5px;font-weight:600;letter-spacing:.02em;
  }
  .badge-cat{background:rgba(123,97,255,.12);color:#B9AAFF}
  .badge-time{background:rgba(255,179,71,.12);color:#FFB347}
  .badge-line{border:1px solid var(--line);color:var(--mute);background:rgba(255,255,255,.02)}

  /* ---------- 页头 ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    min-height:300px;border-bottom:1px solid var(--line-soft);
    display:flex;align-items:flex-end;
  }
  .page-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
  .page-hero-mask{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,10,20,.42) 0%,rgba(6,10,20,.88) 62%,var(--canvas) 100%);
  }
  .page-hero-inner{position:relative;z-index:2;padding:38px 0 44px;width:100%}
  .crumbs{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--faint);flex-wrap:wrap}
  .crumbs a{color:var(--faint);transition:color .18s ease}
  .crumbs a:hover{color:var(--primary)}
  .crumbs .sep{color:rgba(255,255,255,.18)}
  .crumbs .current{color:var(--ink)}
  .page-hero h1{
    margin-top:16px;font-size:28px;line-height:1.24;font-weight:700;letter-spacing:-.01em;
  }
  .page-hero .lead{margin-top:14px;font-size:16px;color:var(--mute);max-width:640px}
  .hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .fact{
    display:flex;align-items:baseline;gap:8px;
    padding:9px 14px;border-radius:999px;
    background:rgba(255,255,255,.03);border:1px solid var(--line);
    font-size:13px;color:var(--mute);
  }
  .fact b{color:var(--accent);font-size:15px;font-weight:700}

  @media (min-width:768px){
    .page-hero{min-height:320px}
    .page-hero h1{font-size:38px}
    .page-hero-inner{padding:44px 0 52px}
  }
  @media (min-width:1280px){
    .page-hero h1{font-size:46px}
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:56px 0;scroll-margin-top:88px}
  @media (min-width:1024px){.section{padding:72px 0}}
  .sec-head{max-width:760px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--primary);
    text-transform:none;
  }
  .eyebrow::before{content:'';width:22px;height:1px;background:var(--primary);opacity:.7}
  h2.sec-title{margin-top:12px;font-size:24px;line-height:1.32;font-weight:700}
  @media (min-width:768px){h2.sec-title{font-size:28px}}
  .sec-sub{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--mute)}
  .divider{height:1px;border:0;background:var(--line-soft)}

  /* ---------- 总览双栏 ---------- */
  .grid-split{display:grid;gap:28px}
  @media (min-width:1024px){.grid-split{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:44px;align-items:center}}

  .panel{
    background:var(--layer);border:1px solid var(--line);border-radius:var(--r-block);
    box-shadow:var(--shadow-card);
  }
  .figure-frame{
    position:relative;border-radius:var(--r-card);overflow:hidden;
    border:1px solid var(--line);background:var(--raise);
  }
  .figure-frame img{width:100%;height:100%;object-fit:cover}
  .figure-bar{
    display:flex;align-items:center;gap:8px;padding:10px 14px;
    background:rgba(255,255,255,.03);border-bottom:1px solid var(--line-soft);
  }
  .figure-bar i{display:block;width:8px;height:8px;border-radius:999px;background:rgba(255,255,255,.16)}
  .figure-bar i:first-child{background:rgba(47,216,192,.75)}
  .figure-bar span{margin-left:6px;font-size:12.5px;color:var(--faint)}

  .point-list{display:grid;gap:12px;margin-top:22px}
  .point-list li{
    display:flex;gap:12px;align-items:flex-start;
    font-size:14.5px;line-height:1.8;color:var(--mute);
  }
  .point-list li .dot{
    flex:0 0 8px;width:8px;height:8px;margin-top:9px;border-radius:999px;
    background:var(--primary);box-shadow:0 0 0 4px rgba(47,216,192,.12);
  }

  /* ---------- 时间轴 ---------- */
  .grid-flow{display:grid;gap:32px}
  @media (min-width:1024px){.grid-flow{grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}}

  .timeline{position:relative;padding-left:34px}
  .timeline::before{
    content:'';position:absolute;left:11px;top:10px;bottom:10px;width:1px;
    background:linear-gradient(180deg,rgba(47,216,192,.65),rgba(123,97,255,.28),transparent);
  }
  .step{position:relative;margin-bottom:18px}
  .step:last-child{margin-bottom:0}
  .step::before{
    content:'';position:absolute;left:-28px;top:26px;width:9px;height:9px;border-radius:999px;
    background:var(--primary);box-shadow:0 0 0 4px rgba(47,216,192,.14);
  }
  .step-card{
    background:var(--layer);border:1px solid var(--line);border-radius:var(--r-card);
    padding:20px 22px;box-shadow:var(--shadow-card);
    transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .step-card:hover{transform:translateY(-2px);border-color:rgba(47,216,192,.4);box-shadow:0 24px 60px rgba(0,0,0,.5)}
  .step-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
  .step-no{
    font-size:13px;font-weight:700;color:#04121A;
    background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
    padding:3px 10px;border-radius:999px;
  }
  .step-head h3{font-size:18px;font-weight:600}
  .step-card p{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--mute)}
  .step-tag{margin-top:12px;display:inline-flex;font-size:12.5px;color:var(--faint)}

  .sticky-index{
    position:sticky;top:96px;
    background:var(--layer);border:1px solid var(--line);border-radius:var(--r-card);
    padding:18px 18px 14px;box-shadow:var(--shadow-card);
  }
  .sticky-index .toc-title{font-size:13px;font-weight:600;color:var(--faint);letter-spacing:.06em}
  .sticky-index ul{margin-top:12px;display:grid;gap:2px}
  .sticky-index a{
    display:flex;align-items:center;justify-content:space-between;gap:8px;
    min-height:44px;padding:8px 10px;border-radius:10px;
    font-size:14px;color:var(--mute);border-left:2px solid transparent;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease;
  }
  .sticky-index a::after{content:'›';color:rgba(255,255,255,.28);font-size:15px}
  .sticky-index a:hover{background:rgba(47,216,192,.08);color:var(--ink);border-left-color:rgba(47,216,192,.6)}
  .sticky-index a:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}

  /* ---------- 分工卡 ---------- */
  .card-grid{display:grid;gap:18px;margin-top:28px}
  @media (min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  .card{
    background:var(--layer);border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px;box-shadow:var(--shadow-card);
    transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .card:hover{transform:translateY(-2px);border-color:rgba(47,216,192,.4);box-shadow:0 24px 60px rgba(0,0,0,.5)}
  .card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
  .card h3{font-size:18.5px;font-weight:600}
  .card p{margin-top:12px;font-size:14.5px;line-height:1.85;color:var(--mute)}
  .card .link-arrow{margin-top:16px}
  .card-icon{
    width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
    background:rgba(47,216,192,.08);border:1px solid rgba(47,216,192,.18);color:var(--primary);
  }

  /* ---------- 注意事项列表 ---------- */
  .notes{margin-top:26px;display:grid;gap:10px}
  @media (min-width:768px){.notes{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 28px}}
  .note-row{
    display:flex;gap:12px;align-items:flex-start;
    padding:16px;border-radius:var(--r-card);
    background:rgba(255,255,255,.02);border:1px solid var(--line-soft);
    transition:border-color .2s ease,background-color .2s ease;
  }
  .note-row:hover{border-color:rgba(47,216,192,.35);background:rgba(47,216,192,.04)}
  .note-row span.n{font-size:13px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:2}
  .note-row p{font-size:14.5px;line-height:1.8;color:var(--mute)}
  .note-row strong{color:var(--ink);font-weight:600}

  /* ---------- FAQ ---------- */
  .faq-list{margin-top:26px;display:grid;gap:10px}
  .faq-item{
    background:var(--layer);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;transition:border-color .2s ease;
  }
  .faq-item.is-open{border-color:rgba(47,216,192,.4)}
  .faq-q{margin:0;font-size:16px}
  .faq-btn{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;
    color:var(--ink);font-size:16px;font-weight:600;line-height:1.6;
    border-left:2px solid transparent;transition:border-color .2s ease,color .2s ease;
  }
  .faq-btn:hover{color:#FFFFFF}
  .faq-btn:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:-2px}
  .faq-item.is-open .faq-btn{border-left-color:var(--primary)}
  .faq-arrow{flex:0 0 18px;color:var(--mute);transition:transform .18s ease,color .18s ease}
  .faq-item.is-open .faq-arrow{transform:rotate(180deg);color:var(--primary)}
  .faq-panel{padding:0 20px 18px;font-size:14.8px;line-height:1.85;color:var(--mute)}
  .faq-panel[hidden]{display:none}
  .faq-panel.is-shown{animation:faqIn .18s ease-out}
  @keyframes faqIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

  /* ---------- 交叉链接 + CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--r-block);
    border:1px solid rgba(47,216,192,.22);
    background:linear-gradient(135deg,rgba(47,216,192,.10),rgba(123,97,255,.10) 60%,rgba(255,255,255,.02));
    padding:32px 24px;
    box-shadow:0 0 0 1px rgba(47,216,192,.06),0 24px 70px rgba(0,0,0,.45);
  }
  .cta-band h2{font-size:22px;font-weight:700}
  @media (min-width:768px){.cta-band{padding:44px 40px}.cta-band h2{font-size:26px}}
  .cta-band p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--mute);max-width:620px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}

  .cross-links{margin-top:32px;padding-top:24px;border-top:1px solid var(--line-soft)}
  .cross-links h3{font-size:15px;font-weight:600;color:var(--faint);letter-spacing:.04em}
  .cross-links ul{margin-top:14px;display:grid;gap:8px}
  @media (min-width:768px){.cross-links ul{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 18px}}
  .cross-links a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    min-height:48px;padding:12px 14px;border-radius:12px;font-size:14.5px;color:var(--mute);
    border:1px solid var(--line-soft);border-left:2px solid transparent;
    transition:border-color .18s ease,color .18s ease,background-color .18s ease,padding-left .18s ease;
  }
  .cross-links a::after{content:'→';color:rgba(255,255,255,.25);transition:color .18s ease}
  .cross-links a:hover{color:var(--ink);background:rgba(47,216,192,.05);border-left-color:var(--primary);padding-left:18px}
  .cross-links a:hover::after{color:var(--primary)}
  .cross-links a:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}

  /* ---------- 页脚 ---------- */
  .row-link{
    display:flex;align-items:center;gap:8px;min-height:44px;padding:8px 10px;border-radius:10px;
    font-size:14.5px;color:var(--mute);border-left:2px solid transparent;
    transition:color .18s ease,background-color .18s ease,border-color .18s ease;
  }
  .row-link:hover{color:var(--ink);background:rgba(47,216,192,.06);border-left-color:rgba(47,216,192,.6)}
  .row-link:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px}

  /* ---------- 移动端底部转化条 ---------- */
  .mobile-cta{
    position:fixed;left:0;right:0;bottom:0;z-index:50;
    display:none;align-items:center;justify-content:space-between;gap:12px;
    height:60px;padding:0 16px;
    background:rgba(10,16,30,.86);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-top:1px solid rgba(47,216,192,.28);
    box-shadow:0 -12px 34px rgba(0,0,0,.5);
  }
  .mobile-cta span{font-size:13px;color:var(--mute);line-height:1.4}
  .mobile-cta .btn{height:42px;padding:0 18px;font-size:14px}
  @media (max-width:767px){
    body{padding-bottom:78px}
    .mobile-cta{display:flex}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
    .btn-primary:hover,.btn-ghost:hover,.card:hover,.step-card:hover{transform:none}
  }

/* roulang page: category3 */
:root{
  --canvas:#060A14;
  --layer:#0E1526;
  --raised:#131C33;
  --primary:#2FD8C0;
  --secondary:#7B61FF;
  --accent:#FFB347;
  --ink:#E6ECF5;
  --mute:#9AA7BD;
  --faint:#6C7893;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.06);
  --ok:#3BD68C;
  --warn:#FF7A5A;
  --r-block:20px;
  --r-card:16px;
  --r-btn:12px;
  --sh-card:0 18px 50px rgba(0,0,0,.45);
  --sh-pop:0 28px 80px rgba(0,0,0,.55);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--canvas);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:40px 40px;opacity:.34;
  -webkit-mask-image:radial-gradient(circle at 28% 0%,#000 0%,transparent 70%);
  mask-image:radial-gradient(circle at 28% 0%,#000 0%,transparent 70%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 10% 4%,rgba(47,216,192,.11),transparent 66%),
    radial-gradient(720px 480px at 94% 96%,rgba(123,97,255,.12),transparent 68%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
h1,h2,h3,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid rgba(47,216,192,.55);outline-offset:2px;border-radius:8px;}
::selection{background:rgba(47,216,192,.28);}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 48px;}
@media (max-width:1023px){.wrap{padding:0 32px;}}
@media (max-width:640px){.wrap{padding:0 20px;}}

.section{padding-top:72px;padding-bottom:72px;}
@media (max-width:768px){.section{padding-top:52px;padding-bottom:52px;}}

/* ---------- 左侧 App Shell ---------- */
.shell-nav{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:60;
  display:flex;flex-direction:column;padding:22px 16px 20px;
  background:rgba(14,21,38,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-right:1px solid var(--line);
  overflow-y:auto;
  transition:width .25s ease,transform .28s ease;
}
.shell-main{margin-left:240px;position:relative;z-index:1;min-height:100vh;}

.nav-brand{display:flex;align-items:center;gap:12px;padding:2px 8px;}
.nav-brand-mark{
  width:40px;height:40px;flex:none;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#04121A;letter-spacing:.02em;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
}
.nav-logo-text{font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;}

.side-link{
  position:relative;display:flex;align-items:center;gap:12px;height:48px;padding:0 12px;
  border-radius:12px;color:var(--mute);font-size:15px;white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.side-link .ic{display:grid;place-items:center;width:20px;flex:none;}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--ink);}
.side-link.is-active{color:var(--ink);background:rgba(47,216,192,.08);}
.side-link.is-active::before{
  content:"";position:absolute;left:-16px;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;
  background:var(--primary);box-shadow:0 0 14px rgba(47,216,192,.75);
}
.side-link.is-active .ic{color:var(--primary);}

@media (min-width:1024px) and (max-width:1279px){
  .shell-nav{width:72px;padding:18px 12px;}
  .shell-main{margin-left:72px;}
  .shell-nav .label,.shell-nav .nav-logo-text,.shell-nav .nav-foot{display:none;}
  .side-link{justify-content:center;padding:0;}
  .side-link.is-active::before{left:-12px;}
  .shell-nav .nav-brand{justify-content:center;padding:0;}
}
@media (max-width:1023px){
  .shell-nav{width:280px;transform:translateX(-105%);box-shadow:var(--sh-pop);}
  .shell-nav.open{transform:translateX(0);}
  .shell-main{margin-left:0;padding-top:64px;}
}

.topbar{display:none;}
@media (max-width:1023px){
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
    align-items:center;justify-content:space-between;padding:0 20px;
    background:rgba(8,13,25,.62);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:height .2s ease,background .2s ease;
  }
  body.scrolled .topbar{height:56px;background:rgba(8,13,25,.9);}
}

.nav-overlay{
  position:fixed;inset:0;z-index:55;background:rgba(0,0,0,.6);
  opacity:0;pointer-events:none;transition:opacity .25s ease;
}
.nav-overlay.show{opacity:1;pointer-events:auto;}

.icon-btn{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--ink);
  transition:background .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:rgba(47,216,192,.1);border-color:rgba(47,216,192,.4);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);border:0;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease,color .2s ease,filter .2s ease;
}
.btn-primary{
  color:#04121A;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
  box-shadow:0 10px 34px rgba(47,216,192,.28);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 44px rgba(47,216,192,.38);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 20px rgba(47,216,192,.24);}
.btn-primary:disabled{filter:saturate(.4);box-shadow:none;cursor:not-allowed;}
.btn-ghost{
  background:transparent;border:1px solid var(--line);color:var(--ink);
}
.btn-ghost:hover{border-color:rgba(47,216,192,.5);background:rgba(47,216,192,.08);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14.5px;font-weight:600;
  border-bottom:1px solid transparent;padding-bottom:2px;transition:border-color .2s ease,color .2s ease;
}
.btn-text:hover{border-bottom-color:var(--primary);color:#7BEAD8;}

/* ---------- 通用组件 ---------- */
.card{
  background:var(--layer);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:border-color .2s ease,transform .2s ease,box-shadow .25s ease;
}
.card:hover{border-color:rgba(47,216,192,.38);transform:translateY(-2px);}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;font-size:12.5px;font-weight:600;line-height:1;
}
.badge-violet{background:rgba(123,97,255,.16);color:#B9ACFF;border:1px solid rgba(123,97,255,.28);}
.badge-accent{background:rgba(255,179,71,.14);color:#FFCB86;border:1px solid rgba(255,179,71,.26);}
.badge-ok{background:rgba(59,214,140,.14);color:#7EE7B3;border:1px solid rgba(59,214,140,.26);}

.sec-head{display:flex;flex-direction:column;gap:10px;margin-bottom:32px;max-width:760px;}
.sec-head.row{flex-direction:row;align-items:flex-end;justify-content:space-between;max-width:none;flex-wrap:wrap;gap:16px;}
.sec-kicker{font-size:12.5px;font-weight:600;letter-spacing:.16em;color:var(--primary);}
h1{font-size:44px;line-height:1.2;font-weight:700;letter-spacing:.01em;}
h2{font-size:29px;line-height:1.32;font-weight:700;}
h3{font-size:20px;line-height:1.45;font-weight:600;}
@media (max-width:768px){
  h1{font-size:30px;}
  h2{font-size:23px;}
  h3{font-size:18px;}
}
.h1-sub{display:block;margin-top:12px;font-size:15px;font-weight:500;color:var(--mute);letter-spacing:0;}
.sec-sub{color:var(--mute);font-size:15.5px;line-height:1.8;}

.divider{border:0;border-top:1px solid var(--line-soft);}

.row-link{
  display:block;min-height:48px;padding:12px 16px;border-radius:10px;color:var(--mute);
  font-size:14.5px;border-left:2px solid transparent;position:relative;
  transition:color .2s ease,background .2s ease,border-color .2s ease,padding-left .2s ease;
}
.row-link:hover{color:var(--ink);background:rgba(255,255,255,.04);border-left-color:var(--primary);}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;overflow:hidden;min-height:300px;display:flex;align-items:center;
  padding:64px 0 56px;border-bottom:1px solid var(--line-soft);
}
.page-head-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.6),rgba(6,10,20,.94));
}
.crumbs{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--faint);flex-wrap:wrap;}
.crumbs a{transition:color .2s ease;}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{opacity:.55;}
.crumbs .cur{color:var(--ink);}
.lede{margin-top:16px;max-width:700px;font-size:16px;line-height:1.85;color:var(--mute);}

/* ---------- 对照双卡 ---------- */
.cmp-card{padding:28px;position:relative;overflow:hidden;}
.cmp-card::before{content:"";position:absolute;left:0;top:0;right:0;height:2px;}
.cmp-card.is-ok::before{background:linear-gradient(90deg,var(--ok),rgba(59,214,140,0));}
.cmp-card.is-warn::before{background:linear-gradient(90deg,var(--accent),rgba(255,179,71,0));}
.cmp-card h3{display:flex;align-items:center;gap:10px;}
.cmp-list{margin-top:8px;}
.cmp-list li{
  display:flex;gap:12px;padding:15px 0;border-bottom:1px solid var(--line-soft);
  font-size:15px;line-height:1.75;color:var(--mute);
}
.cmp-list li:last-child{border-bottom:0;}
.cmp-dot{
  width:18px;height:18px;flex:none;margin-top:4px;border-radius:999px;display:grid;place-items:center;
  font-size:11px;font-weight:700;line-height:1;
}
.is-ok .cmp-dot{background:rgba(59,214,140,.16);color:#7EE7B3;}
.is-warn .cmp-dot{background:rgba(255,179,71,.16);color:#FFCB86;}

/* ---------- 对照表 ---------- */
.table-scroll{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--layer);box-shadow:var(--sh-card);
}
table.cmp-table{width:100%;min-width:680px;border-collapse:collapse;font-size:15px;}
.cmp-table th{
  text-align:left;padding:16px 20px;font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--faint);background:rgba(255,255,255,.02);border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.cmp-table td{padding:16px 20px;border-bottom:1px solid var(--line-soft);color:var(--mute);line-height:1.7;}
.cmp-table tr:last-child td{border-bottom:0;}
.cmp-table tr:hover td{background:rgba(47,216,192,.04);}
.cmp-table td:first-child{color:var(--ink);font-weight:600;white-space:nowrap;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 异常提示条 ---------- */
.alert-row{
  display:flex;gap:16px;align-items:flex-start;padding:18px 20px;
  border:1px solid var(--line);border-left:3px solid var(--warn);border-radius:12px;
  background:var(--layer);
  transition:border-color .2s ease,transform .2s ease;
}
.alert-row:hover{transform:translateY(-2px);border-color:rgba(255,179,71,.32);border-left-color:var(--warn);}
.alert-row .mark{
  width:26px;height:26px;flex:none;border-radius:8px;display:grid;place-items:center;
  background:rgba(255,179,71,.14);color:#FFCB86;font-weight:700;font-size:13px;
}
.alert-row strong{display:block;color:var(--ink);font-size:15.5px;font-weight:600;margin-bottom:4px;}
.alert-row p{font-size:14.5px;color:var(--mute);line-height:1.75;}

/* ---------- 步骤 ---------- */
.steps{display:grid;gap:20px;grid-template-columns:repeat(4,minmax(0,1fr));}
.step{
  position:relative;padding:26px 22px;border:1px solid var(--line);
  border-radius:var(--r-card);background:var(--layer);
  transition:border-color .2s ease,transform .2s ease,box-shadow .25s ease;
}
.step:hover{border-color:rgba(47,216,192,.4);transform:translateY(-2px);box-shadow:var(--sh-card);}
.step-num{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--primary);font-variant-numeric:tabular-nums;}
.step h3{margin-top:12px;font-size:17px;}
.step p{margin-top:8px;font-size:14.5px;color:var(--mute);line-height:1.75;}
@media (max-width:1023px){.steps{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:560px){.steps{grid-template-columns:1fr;}}

/* ---------- 内容卡 ---------- */
.post-card{
  display:block;border:1px solid var(--line);border-radius:var(--r-card);background:var(--layer);
  overflow:hidden;box-shadow:var(--sh-card);
  transition:border-color .2s ease,transform .2s ease,box-shadow .25s ease;
}
.post-card:hover{border-color:rgba(47,216,192,.4);transform:translateY(-2px);}
.post-card .thumb{
  aspect-ratio:16/9;background:#0b1120;border-bottom:1px solid var(--line);
  display:grid;place-items:center;overflow:hidden;
}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;}
.post-card .body{padding:22px;}
.post-card h3{font-size:17px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.post-card .excerpt{
  margin-top:10px;font-size:14.5px;color:var(--mute);line-height:1.75;
  overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.post-meta{display:flex;align-items:center;gap:10px;margin-top:16px;flex-wrap:wrap;}

.empty{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px;
  padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-block);
  background:rgba(14,21,38,.62);
}
.empty-ic{
  width:64px;height:64px;border-radius:18px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(47,216,192,.06);color:var(--primary);
}
.empty p{color:var(--mute);font-size:15px;max-width:440px;line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-item{
  position:relative;background:var(--layer);border:1px solid var(--line);
  border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item.open{border-color:rgba(47,216,192,.36);}
.faq-item.open::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--primary);}
.faq-h{margin:0;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:#7BEAD8;}
.faq-arrow{
  width:26px;height:26px;flex:none;border-radius:999px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--mute);transition:transform .18s ease,color .18s ease;
}
.faq-item.open .faq-arrow{transform:rotate(180deg);color:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .18s ease;}
.faq-a .inner{padding:0 22px 22px;color:var(--mute);font-size:15px;line-height:1.85;}

/* ---------- 交叉链接 ---------- */
.cross-card{
  display:flex;flex-direction:column;gap:8px;padding:22px;border:1px solid var(--line);
  border-radius:var(--r-card);background:rgba(19,28,51,.5);
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.cross-card:hover{border-color:rgba(47,216,192,.42);transform:translateY(-2px);background:rgba(19,28,51,.75);}
.cross-card strong{font-size:16px;color:var(--ink);}
.cross-card span{font-size:14px;color:var(--mute);line-height:1.7;}
.cross-card .go{margin-top:4px;font-size:13.5px;color:var(--primary);font-weight:600;}

/* ---------- 移动底部条 ---------- */
.mobile-bar{display:none;}
@media (max-width:767px){
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:65;height:60px;
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
    background:rgba(19,28,51,.64);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
    box-shadow:0 -10px 30px rgba(47,216,192,.12);
  }
  body{padding-bottom:60px;}
}

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

/* roulang page: category4 */
:root{
  --canvas:#060A14;
  --surface:#0E1526;
  --raised:#131C33;
  --primary:#2FD8C0;
  --secondary:#7B61FF;
  --accent:#FFB347;
  --ink:#E6ECF5;
  --mute:#9AA7BD;
  --faint:#6C7893;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.06);
  --r-block:20px;
  --r-card:16px;
  --r-btn:12px;
  --sh-card:0 18px 50px rgba(0,0,0,.45);
  --sh-float:0 28px 80px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  background:var(--canvas);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:40px 40px;
  opacity:.55;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(720px 520px at 6% -8%, rgba(47,216,192,.10), transparent 70%),
    radial-gradient(680px 520px at 102% 106%, rgba(123,97,255,.10), transparent 70%);
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.32;letter-spacing:.005em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}

.num,.stat-num{font-variant-numeric:tabular-nums}

/* ============ 容器 ============ */
.wrap{
  max-width:1200px;
  margin:0 auto;
  padding-left:48px;
  padding-right:48px;
  width:100%;
}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:240px;
  z-index:50;
  display:flex;
  flex-direction:column;
  background:rgba(10,16,30,.72);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-right:1px solid var(--line);
}

.sidebar-inner{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:26px 18px 22px;
  overflow-y:auto;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:4px 6px;
}

.brand-mark{
  width:40px;
  height:40px;
  flex:none;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-size:14px;
  font-weight:700;
  color:#061018;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
  box-shadow:0 10px 26px rgba(47,216,192,.28);
}

.brand-text{
  font-size:16.5px;
  font-weight:700;
  color:var(--ink);
  white-space:nowrap;
}

.side-sep{
  height:1px;
  background:var(--line-soft);
  margin:22px 6px 18px;
}

.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:46px;
  padding:9px 14px;
  border-radius:12px;
  color:var(--mute);
  font-size:14.5px;
  font-weight:500;
  transition:background .22s var(--ease),color .22s var(--ease);
}

.side-link .ic{
  width:30px;
  height:30px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:9px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--mute);
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}

.side-link .label{white-space:nowrap}

.side-link:hover{
  background:rgba(255,255,255,.05);
  color:var(--ink);
}

.side-link:hover .ic{
  color:var(--primary);
  border-color:rgba(47,216,192,.35);
}

.side-link.is-active{
  background:rgba(47,216,192,.10);
  color:#FFFFFF;
  box-shadow:inset 0 0 22px rgba(47,216,192,.10);
}

.side-link.is-active .ic{
  color:#061018;
  background-image:linear-gradient(135deg,#2FD8C0,#7B61FF);
  border-color:transparent;
}

.side-link.is-active::before{
  content:"";
  position:absolute;
  left:-18px;
  top:9px;
  bottom:9px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--primary);
  box-shadow:0 0 14px rgba(47,216,192,.85);
}

.side-cta{
  margin-top:auto;
  padding-top:26px;
}

.side-note{
  margin-top:12px;
  padding:0 6px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--faint);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r-btn);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
  white-space:nowrap;
  cursor:pointer;
}

.btn-primary{
  color:#04141A;
  background-image:linear-gradient(135deg,#2FD8C0 0%,#7B61FF 100%);
  box-shadow:0 10px 34px rgba(47,216,192,.28);
}

.btn-primary:hover{
  transform:translateY(-1px);
  filter:brightness(1.06);
  box-shadow:0 14px 46px rgba(47,216,192,.38);
}

.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 20px rgba(47,216,192,.24)}

.btn-outline{
  color:#FFFFFF;
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.02);
}

.btn-outline:hover{
  border-color:rgba(47,216,192,.55);
  background:rgba(47,216,192,.08);
  transform:translateY(-1px);
}

.btn-outline:active{transform:translateY(1px)}

.btn-sm{
  min-height:38px;
  padding:0 16px;
  font-size:13.5px;
  border-radius:10px;
}

.btn:focus-visible,
.side-link:focus-visible,
.row-link:focus-visible,
.icon-btn:focus-visible,
a:focus-visible,
button:focus-visible{
  outline:2px solid rgba(47,216,192,.55);
  outline-offset:2px;
}

.btn[disabled],
.btn.is-disabled{
  opacity:.5;
  filter:saturate(.5);
  box-shadow:none;
  cursor:not-allowed;
  transform:none;
}

.icon-btn{
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border-radius:11px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--ink);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}

.icon-btn:hover{background:rgba(47,216,192,.12);border-color:rgba(47,216,192,.4)}

/* ============ 主内容区 ============ */
.main-wrap{
  position:relative;
  z-index:1;
  margin-left:240px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* ============ 顶部栏（移动） ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:64px;
  z-index:60;
  align-items:center;
  justify-content:space-between;
  padding:0 20px;
  background:rgba(10,16,30,.78);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:height .25s var(--ease),background .25s var(--ease);
}

.topbar.scrolled{
  height:56px;
  background:rgba(8,13,25,.92);
}

.topbar .brand-mark{width:34px;height:34px;font-size:12.5px;border-radius:10px}
.topbar .brand-text{font-size:15px}

.topbar-actions{display:flex;align-items:center;gap:10px}

/* ============ 抽屉 ============ */
.overlay{
  position:fixed;
  inset:0;
  z-index:70;
  background:rgba(0,0,0,.6);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
}

.overlay.open{opacity:1;visibility:visible}

.drawer{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:280px;
  max-width:86vw;
  z-index:80;
  background:rgba(12,19,34,.96);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-right:1px solid var(--line);
  padding:22px 18px 26px;
  overflow-y:auto;
  transform:translateX(-100%);
  transition:transform .28s var(--ease);
}

.drawer.open{transform:translateX(0)}

.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:20px;
}

/* ============ 分类页头 ============ */
.cat-hero{
  position:relative;
  min-height:312px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}

.cat-hero .hero-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.5;
}

.cat-hero .hero-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.72) 0%,rgba(6,10,20,.92) 62%,rgba(6,10,20,.98) 100%);
}

.hero-inner{
  position:relative;
  z-index:2;
  padding-top:64px;
  padding-bottom:44px;
}

.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--faint);
  margin-bottom:18px;
  flex-wrap:wrap;
}

.crumbs a{color:var(--faint);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:rgba(255,255,255,.22)}
.crumbs .cur{color:var(--ink)}

.cat-hero h1{
  font-size:44px;
  font-weight:700;
  letter-spacing:.01em;
  max-width:820px;
}

.hero-lede{
  margin-top:16px;
  max-width:640px;
  font-size:16px;
  line-height:1.8;
  color:var(--mute);
}

.hero-tags{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  margin-top:22px;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.02em;
  white-space:nowrap;
}

.badge-sec{
  color:#B9AEFF;
  background:rgba(123,97,255,.14);
  border:1px solid rgba(123,97,255,.28);
}

.badge-accent{
  color:#FFCE8A;
  background:rgba(255,179,71,.12);
  border:1px solid rgba(255,179,71,.26);
}

.badge-line{
  color:var(--mute);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}

/* ============ 布局：内容 + 侧栏索引 ============ */
.cat-layout{display:block}

.cat-main > section + section{margin-top:72px}

.sec-head{margin-bottom:26px}

.sec-head h2,
.cat-main h2{
  font-size:28px;
  font-weight:700;
  letter-spacing:.01em;
}

.sec-head p{
  margin-top:10px;
  font-size:15px;
  color:var(--mute);
  max-width:660px;
}

/* ============ 问题卡片矩阵 ============ */
.q-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}

.qcard{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:26px 24px 22px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  scroll-margin-top:100px;
}

.qcard:hover{
  transform:translateY(-2px);
  border-color:rgba(47,216,192,.40);
  box-shadow:0 22px 58px rgba(0,0,0,.52);
}

.qcard-top{
  display:flex;
  align-items:center;
  gap:12px;
}

.qcard-num{
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:rgba(255,255,255,.22);
  font-variant-numeric:tabular-nums;
}

.qcard-icon{
  width:38px;
  height:38px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:11px;
  border:1px solid var(--line);
  background:rgba(47,216,192,.08);
  color:var(--primary);
}

.qcard h3{
  font-size:20px;
  font-weight:600;
  line-height:1.45;
}

.qcard p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--mute);
}

.qcard-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13.5px;
  font-weight:600;
  color:var(--primary);
  transition:gap .2s var(--ease),color .2s var(--ease);
}

.link-arrow::after{
  content:"→";
  transition:transform .2s var(--ease);
}

.link-arrow:hover{color:#7BFFE8}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ 自查路径 ============ */
.steps{
  position:relative;
  margin-top:8px;
  padding-left:30px;
}

.steps::before{
  content:"";
  position:absolute;
  left:7px;
  top:12px;
  bottom:12px;
  width:1px;
  background:linear-gradient(180deg,rgba(47,216,192,.55),rgba(123,97,255,.18));
}

.step{
  position:relative;
  padding:0 0 30px 0;
}

.step:last-child{padding-bottom:0}

.step::before{
  content:"";
  position:absolute;
  left:-30px;
  top:8px;
  width:15px;
  height:15px;
  border-radius:50%;
  background:var(--canvas);
  border:2px solid var(--primary);
  box-shadow:0 0 14px rgba(47,216,192,.45);
}

.step h3{
  font-size:17.5px;
  font-weight:600;
  margin-bottom:8px;
}

.step p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--mute);
  max-width:640px;
}

/* ============ 快速答复对照 ============ */
.qa-list{
  display:grid;
  gap:14px;
  margin-top:4px;
}

.qa-item{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);
  gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:border-color .25s var(--ease);
}

.qa-item:hover{border-color:rgba(47,216,192,.32)}

.qa-q{
  padding:22px 24px;
  background:rgba(123,97,255,.07);
  border-right:1px solid var(--line-soft);
}

.qa-q span{
  display:inline-block;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.12em;
  color:#B9AEFF;
  margin-bottom:8px;
}

.qa-q p{
  font-size:15.5px;
  font-weight:600;
  line-height:1.7;
  color:var(--ink);
}

.qa-a{
  padding:22px 24px;
  display:flex;
  align-items:center;
}

.qa-a p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--mute);
}

/* ============ 数据块 ============ */
.stat-band{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  padding:26px 24px;
  border-radius:var(--r-block);
  border:1px solid var(--line);
  background:linear-gradient(135deg,rgba(19,28,51,.9),rgba(14,21,38,.9));
}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:8px 6px;
}

.stat + .stat{
  border-left:1px solid var(--line-soft);
  padding-left:20px;
}

.stat-num{
  font-size:30px;
  font-weight:700;
  line-height:1.1;
  color:var(--primary);
  letter-spacing:.01em;
}

.stat-num small{
  font-size:13px;
  font-weight:600;
  color:var(--faint);
  margin-left:4px;
}

.stat-label{
  font-size:13.5px;
  color:var(--mute);
}

/* ============ 交叉链接 ============ */
.xlinks{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}

.xcard{
  display:block;
  padding:24px 22px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--surface);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}

.xcard:hover{
  transform:translateY(-2px);
  border-color:rgba(47,216,192,.40);
  box-shadow:var(--sh-card);
}

.xcard h3{
  font-size:17.5px;
  font-weight:600;
  margin-bottom:8px;
}

.xcard p{
  font-size:14px;
  line-height:1.78;
  color:var(--mute);
}

/* ============ 底部转化带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-block);
  border:1px solid rgba(47,216,192,.28);
  background:linear-gradient(135deg,rgba(19,28,51,.95),rgba(9,15,29,.95));
  padding:44px 40px;
  box-shadow:0 0 0 1px rgba(47,216,192,.06),0 24px 60px rgba(0,0,0,.5);
}

.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;
  top:-90px;
  width:320px;
  height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,216,192,.16),transparent 68%);
  pointer-events:none;
}

.cta-band h2{
  font-size:28px;
  margin-bottom:12px;
  position:relative;
}

.cta-band p{
  font-size:15px;
  color:var(--mute);
  max-width:600px;
  position:relative;
  line-height:1.8;
}

.cta-actions{
  display:flex;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  margin-top:26px;
  position:relative;
}

/* ============ 侧栏索引 ============ */
.cat-aside{
  margin-top:72px;
  display:grid;
  gap:18px;
}

.aside-card{
  padding:22px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--surface);
}

.aside-card h3{
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--faint);
  margin-bottom:14px;
}

.idx-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-height:44px;
  padding:8px 12px;
  margin:0 -4px;
  border-radius:10px;
  border-left:2px solid transparent;
  font-size:14px;
  color:var(--mute);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}

.idx-link::after{
  content:"›";
  color:rgba(255,255,255,.2);
  font-size:16px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}

.idx-link:hover{
  background:rgba(255,255,255,.04);
  border-left-color:var(--primary);
  color:var(--ink);
}

.idx-link:hover::after{color:var(--primary);transform:translateX(2px)}

.aside-note{
  font-size:13px;
  line-height:1.8;
  color:var(--faint);
  margin-top:14px;
}

/* ============ 页脚链接 ============ */
.row-link{
  display:block;
  min-height:44px;
  padding:10px 12px;
  margin:0 -12px;
  border-left:2px solid transparent;
  border-radius:8px;
  font-size:14px;
  color:var(--mute);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}

.row-link:hover{
  background:rgba(255,255,255,.04);
  border-left-color:var(--primary);
  color:var(--ink);
}

.row-link.is-active{
  color:var(--primary);
  border-left-color:var(--primary);
}

.divider{
  border:none;
  border-top:1px solid var(--line-soft);
}

.text-mute{color:var(--mute)}
.text-faint{color:var(--faint)}
.text-ink{color:var(--ink)}
.text-canvas{color:var(--canvas)}

/* ============ 移动端底部转化条 ============ */
.mobile-cta{
  display:none;
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:65;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  height:60px;
  padding:0 16px;
  background:rgba(12,19,34,.88);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-top:1px solid rgba(47,216,192,.28);
  box-shadow:0 -14px 34px rgba(0,0,0,.5);
}

.mobile-cta .mtxt{
  font-size:13.5px;
  color:var(--mute);
  line-height:1.4;
  max-width:56%;
}

/* ============ 响应式 ============ */
@media (min-width:1360px){
  .cat-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 262px;
    gap:34px;
    align-items:start;
  }
  .cat-aside{
    margin-top:0;
    position:sticky;
    top:96px;
  }
}

@media (max-width:1279px) and (min-width:1024px){
  .sidebar{width:72px}
  .sidebar-inner{padding:24px 12px 22px;align-items:center}
  .sidebar .brand-text,
  .sidebar .side-note{display:none}
  .sidebar .brand{padding:4px 0}
  .side-sep{width:36px;margin:22px 0 18px}
  .side-link{justify-content:center;padding:9px 0;width:48px;gap:0}
  .side-link .label{
    position:absolute;
    left:calc(100% + 14px);
    top:50%;
    transform:translateY(-50%) translateX(-6px);
    padding:7px 13px;
    border-radius:10px;
    background:var(--raised);
    border:1px solid var(--line);
    box-shadow:var(--sh-card);
    font-size:13px;
    color:var(--ink);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    z-index:90;
  }
  .side-link:hover .label{
    opacity:1;
    transform:translateY(-50%) translateX(0);
  }
  .side-link.is-active::before{left:-12px}
  .side-cta{width:100%;display:flex;justify-content:center}
  .side-cta-btn{padding:0;width:48px;min-height:48px}
  .side-cta-btn .cta-text{display:none}
  .main-wrap{margin-left:72px}
}

@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main-wrap{margin-left:0;padding-top:64px}
  .cat-hero h1{font-size:32px}
  .cat-hero{min-height:270px}
  .hero-inner{padding-top:44px;padding-bottom:36px}
  .wrap{padding-left:32px;padding-right:32px}
}

@media (max-width:767px){
  body{padding-bottom:60px}
  .mobile-cta{display:flex}
  .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:22px 18px}
  .stat + .stat{border-left:none;padding-left:6px}
  .stat:nth-child(even){border-left:1px solid var(--line-soft);padding-left:16px}
}

@media (max-width:639px){
  .wrap{padding-left:20px;padding-right:20px}
  .cat-hero{min-height:240px}
  .cat-hero h1{font-size:27px;line-height:1.34}
  .hero-lede{font-size:14.5px}
  .sec-head h2,
  .cat-main h2{font-size:22px}
  .q-grid{grid-template-columns:minmax(0,1fr)}
  .xlinks{grid-template-columns:minmax(0,1fr)}
  .qa-item{grid-template-columns:minmax(0,1fr)}
  .qa-q{border-right:none;border-bottom:1px solid var(--line-soft)}
  .cta-band{padding:30px 22px}
  .cta-band h2{font-size:22px}
  .cat-main > section + section{margin-top:52px}
  .steps{padding-left:26px}
  .step::before{left:-26px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .qcard:hover,.xcard:hover,.btn-primary:hover{transform:none !important}
}