/* roulang page: index */
:root{
    --bg-deep:#04121C;
    --bg-base:#071E2C;
    --bg-panel:#0B2A3C;
    --brand:#16B8D4;
    --brand-2:#3FF0D0;
    --accent:#FFB25B;
    --txt:#E6F3F8;
    --txt-2:#A7C2CE;
    --txt-3:#6C8896;
    --line:rgba(120,230,240,.14);
    --r-s:10px;
    --r-m:16px;
    --r-l:20px;
    --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
    --shadow-hover:0 18px 40px -18px rgba(22,184,212,.45);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-base);
    color:var(--txt);
    font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  button{background:none;border:none;cursor:pointer}
  h1,h2,h3,h4,p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  ::selection{background:rgba(63,240,208,.28);color:#fff}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media(min-width:768px){.container{padding:0 32px}}
  @media(min-width:1440px){.container{max-width:1280px}}

  /* 背景装饰 */
  .deco-layer{position:fixed;inset:0;pointer-events:none;z-index:0}
  .deco-grid{
    position:absolute;inset:0;opacity:.055;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='96' viewBox='0 0 56 96'%3E%3Cpath d='M28 0L56 16v32L28 64 0 48V16z' fill='none' stroke='%2316B8D4' stroke-width='1'/%3E%3C/svg%3E");
    background-size:56px 96px;
  }
  .deco-glow{
    position:absolute;top:-160px;right:-120px;width:620px;height:620px;border-radius:50%;
    background:radial-gradient(circle,rgba(22,184,212,.20),transparent 68%);
  }
  .deco-wave{position:absolute;left:-10%;top:520px;width:120%;opacity:.09}
  @media(max-width:767px){.deco-grid{display:none}}

  .site-wrap{position:relative;z-index:1}

  /* 导航 */
  .nav-top{
    position:sticky;top:0;z-index:60;
    background:rgba(7,30,44,.86);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .nav-top-inner{height:64px;display:flex;align-items:center;gap:18px}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;
    background:linear-gradient(135deg,#3FF0D0,#16B8D4);
    display:flex;align-items:center;justify-content:center;
    color:#04121C;font-weight:800;font-size:17px;letter-spacing:-.02em;
    box-shadow:0 0 0 1px rgba(63,240,208,.4),0 8px 20px -10px rgba(22,184,212,.9);
  }
  .brand-word{display:flex;flex-direction:column;line-height:1.1}
  .brand-word b{font-size:16px;font-weight:800;letter-spacing:.01em}
  .brand-word span{font-size:11px;color:var(--txt-3);letter-spacing:.22em}
  .nav-search{
    flex:1 1 auto;max-width:420px;display:flex;align-items:center;
    background:rgba(255,255,255,.05);border:1px solid rgba(120,230,240,.16);
    border-radius:999px;padding:0 6px 0 16px;height:40px;transition:border-color .2s,box-shadow .2s;
  }
  .nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.22)}
  .nav-search input{flex:1;background:none;border:none;outline:none;font-size:14px;min-width:0}
  .nav-search input::placeholder{color:var(--txt-3)}
  .nav-search button{
    width:30px;height:30px;border-radius:999px;color:var(--brand-2);
    display:flex;align-items:center;justify-content:center;transition:background .2s;
  }
  .nav-search button:hover{background:rgba(22,184,212,.16)}
  .nav-links{display:flex;align-items:center;gap:18px;margin-left:auto}
  .nav-text-link{font-size:14px;color:var(--txt-2);transition:color .2s}
  .nav-text-link:hover{color:var(--brand-2)}
  .nav-burger{
    width:40px;height:40px;border-radius:12px;border:1px solid rgba(120,230,240,.2);
    color:var(--txt-2);display:flex;align-items:center;justify-content:center;
  }
  .nav-burger:hover{color:var(--brand-2);border-color:rgba(63,240,208,.45)}

  .nav-tabs{border-bottom:1px solid var(--line);background:rgba(4,18,28,.55)}
  .nav-tabs-inner{padding:9px 0}
  .tabs-scroll{
    display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x proximity;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .tabs-scroll::-webkit-scrollbar{display:none}
  .tab{
    flex:0 0 auto;position:relative;scroll-snap-align:start;white-space:nowrap;
    padding:7px 16px;border-radius:999px;font-size:14px;color:var(--txt-2);
    border:1px solid transparent;transition:color .2s,background .2s,border-color .2s;
  }
  .tab:hover{color:var(--txt);background:rgba(255,255,255,.045)}
  .tab.active{
    color:var(--brand-2);
    border-color:rgba(63,240,208,.45);
    background:rgba(22,184,212,.12);
  }
  .tab.active::after{
    content:"";position:absolute;left:16px;right:16px;bottom:-10px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,#16B8D4,#3FF0D0);box-shadow:0 0 10px rgba(63,240,208,.85);
  }

  .mobile-drawer{
    position:fixed;inset:64px 0 auto 0;z-index:55;
    background:rgba(4,18,28,.97);border-bottom:1px solid var(--line);
    backdrop-filter:blur(14px);padding:16px 20px 22px;
    display:none;
  }
  .mobile-drawer.open{display:block}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:12px 4px;border-bottom:1px solid rgba(120,230,240,.10);
    font-size:15px;color:var(--txt-2);
  }
  .drawer-link:hover,.drawer-link.active{color:var(--brand-2)}

  /* 玻璃与卡片 */
  .glass{
    position:relative;
    background:rgba(255,255,255,.05);
    backdrop-filter:blur(12px);
    border:1px solid rgba(120,230,240,.16);
    border-radius:var(--r-m);
  }
  .glass::before{
    content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:inherit;
    background:linear-gradient(90deg,transparent,rgba(63,240,208,.6),transparent);
  }
  .card{
    position:relative;background:var(--bg-panel);border:1px solid var(--line);
    border-radius:var(--r-m);box-shadow:var(--shadow-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(63,240,208,.4)}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;letter-spacing:.06em;padding:3px 10px;border-radius:999px;
    color:var(--brand-2);background:rgba(22,184,212,.12);
    border:1px solid rgba(63,240,208,.32);
  }
  .badge-warm{color:var(--accent);background:rgba(255,178,91,.12);border-color:rgba(255,178,91,.38)}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:700;
    transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out,background .2s;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,#3FF0D0,#16B8D4);color:#04121C;
    box-shadow:0 0 0 1px rgba(63,240,208,.45),0 10px 28px -8px rgba(22,184,212,.6);
  }
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(63,240,208,.6),0 14px 34px -6px rgba(22,184,212,.8)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.45),0 6px 16px -8px rgba(22,184,212,.7)}
  .btn-ghost{
    background:transparent;color:var(--txt);border:1px solid rgba(63,240,208,.5);
  }
  .btn-ghost:hover{background:rgba(22,184,212,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
  .btn-breathe{animation:breathe 2.4s ease-in-out infinite}
  @keyframes breathe{
    0%,100%{box-shadow:0 0 0 1px rgba(63,240,208,.45),0 10px 28px -8px rgba(22,184,212,.6)}
    50%{box-shadow:0 0 0 1px rgba(63,240,208,.62),0 12px 34px -6px rgba(22,184,212,.82)}
  }

  /* 表单 */
  .field{
    width:100%;height:48px;border-radius:12px;
    background:rgba(255,255,255,.05);border:1px solid rgba(120,230,240,.18);
    padding:0 14px;font-size:14px;outline:none;
    transition:border-color .2s,box-shadow .2s,background .2s;
  }
  .field::placeholder{color:var(--txt-3)}
  .field:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25);background:rgba(255,255,255,.07)}
  .field-label{display:block;font-size:13px;color:var(--txt-2);margin-bottom:6px}

  /* Hero */
  .hero{position:relative;padding:64px 0 72px;overflow:hidden}
  .hero-bg{
    position:absolute;inset:0;
    background-image:url("/assets/images/backpic/back-1.webp");
    background-size:cover;background-position:center;
  }
  .hero-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(4,18,28,.72) 0%,rgba(4,18,28,.90) 72%,rgba(7,30,44,1) 100%);
  }
  .hero-inner{position:relative;display:grid;grid-template-columns:1fr;gap:40px}
  @media(min-width:1024px){
    .hero-inner{grid-template-columns:7fr 5fr;gap:48px;align-items:center}
  }
  .hero h1{
    font-size:clamp(2rem,4.4vw,3.4rem);
    font-weight:800;line-height:1.18;letter-spacing:-.01em;
    max-width:16ch;
  }
  .hero h1 em{font-style:normal;color:var(--brand-2)}
  .hero-sub{margin-top:16px;font-size:16px;color:var(--txt-2);max-width:32ch}
  .hero-metrics{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px}
  .hero-metric{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--txt-2)}
  .hero-metric i{color:var(--brand-2);font-size:12px}
  .login-card{padding:22px;border-radius:var(--r-l);position:relative;overflow:hidden}
  .login-card .card-bg{
    position:absolute;inset:0;
    background-image:url("/assets/images/backpic/back-3.png");
    background-size:cover;background-position:center;opacity:.34;
  }
  .login-card .card-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(4,18,28,.5),rgba(4,18,28,.92));
  }
  .login-card > *{position:relative;z-index:2}
  .login-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--txt-2);margin-top:4px}
  .link-brand{color:var(--brand-2);transition:box-shadow .2s}
  .link-brand:hover{box-shadow:inset 0 -1px 0 0 rgba(63,240,208,.8)}

  /* 通用区块 */
  .section{padding:56px 0}
  @media(min-width:1024px){.section{padding:96px 0}}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
  .eyebrow{font-size:12px;letter-spacing:.22em;color:var(--brand-2);text-transform:uppercase}
  .h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;line-height:1.3;margin-top:8px}
  .lead{margin-top:10px;font-size:15px;color:var(--txt-2);max-width:52ch}

  .value-item{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid rgba(120,230,240,.10)}
  .value-item:last-child{border-bottom:none}
  .value-icon{
    flex:0 0 auto;width:40px;height:40px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(22,184,212,.12);border:1px solid rgba(63,240,208,.28);
    color:var(--brand-2);font-size:15px;
  }

  /* Bento */
  .bento-main{
    display:flex;flex-direction:column;justify-content:flex-end;
    min-height:340px;padding:26px;border-radius:var(--r-l);overflow:hidden;position:relative;
  }
  .bento-main img{
    position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
    transition:transform .3s ease-out;
  }
  .bento-main:hover img{transform:scale(1.03)}
  .bento-main .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,18,28,.35),rgba(4,18,28,.92))}
  .bento-main > .inner{position:relative;z-index:2}
  .bento-sm{padding:18px;border-radius:var(--r-m);display:flex;flex-direction:column;gap:10px;min-height:160px}
  .bento-sm .thumb{width:100%;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:rgba(255,255,255,.04)}
  .bento-sm .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
  .bento-sm:hover .thumb img{transform:scale(1.03)}
  .arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--brand-2)}
  .arrow-link i{transition:transform .2s ease-out}
  .card:hover .arrow-link i,.bento-main:hover .arrow-link i,.bento-sm:hover .arrow-link i{transform:translateX(4px)}

  /* 信任 */
  .stats-band{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden}
  @media(min-width:640px){.stats-band{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){.stats-band{grid-template-columns:repeat(4,1fr)}}
  .stat-cell{background:rgba(11,42,60,.72);padding:26px 22px}
  .stat-num{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:30px;font-weight:700;color:var(--brand-2);letter-spacing:-.02em}
  .stat-unit{font-size:12px;color:var(--txt-3);margin-left:4px}
  .stat-label{margin-top:6px;font-size:13px;color:var(--txt-2)}
  .logo-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}
  @media(min-width:640px){.logo-strip{grid-template-columns:repeat(4,1fr)}}
  @media(min-width:1024px){.logo-strip{grid-template-columns:repeat(8,1fr)}}
  .logo-block{
    height:56px;border-radius:12px;border:1px solid var(--line);
    background:rgba(255,255,255,.03);display:flex;align-items:center;justify-content:center;
    font-size:12px;color:var(--txt-3);opacity:.5;transition:opacity .25s,color .25s,border-color .25s;
  }
  .logo-block:hover{opacity:1;color:var(--brand-2);border-color:rgba(63,240,208,.4)}

  /* CTA 带 */
  .cta-band{padding:32px;border-radius:var(--r-l);display:grid;gap:22px}
  @media(min-width:1024px){.cta-band{grid-template-columns:1.1fr 1fr;align-items:center;padding:40px}}
  .cta-form{display:flex;gap:10px;flex-wrap:wrap}
  .cta-form .field{flex:1 1 220px;min-width:0}

  /* CMS 列表 */
  .post-grid{display:grid;grid-template-columns:1fr;gap:20px;min-height:220px}
  @media(min-width:768px){.post-grid{grid-template-columns:repeat(2,1fr)}}
  .post-card{padding:16px;border-radius:var(--r-m);display:flex;gap:16px;align-items:flex-start}
  .post-thumb{
    flex:0 0 132px;width:132px;aspect-ratio:16/9;border-radius:12px;overflow:hidden;
    background:rgba(255,255,255,.05);
  }
  .post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
  .post-card:hover .post-thumb img{transform:scale(1.03)}
  .post-title{
    margin-top:8px;font-size:16px;font-weight:600;line-height:1.5;
    display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card:hover .post-title{color:var(--brand-2)}
  .post-sum{
    margin-top:6px;font-size:13px;color:var(--txt-2);line-height:1.7;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-time{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;color:var(--txt-3);margin-top:8px}
  .empty-state{
    grid-column:1/-1;min-height:220px;display:flex;flex-direction:column;
    align-items:center;justify-content:center;gap:14px;text-align:center;
    border:1px dashed rgba(120,230,240,.2);border-radius:var(--r-m);padding:32px;
  }
  .empty-state i{font-size:44px;color:rgba(22,184,212,.4)}

  /* FAQ */
  .faq-item{border:1px solid var(--line);border-radius:var(--r-m);background:rgba(11,42,60,.6);overflow:hidden;margin-bottom:12px}
  .faq-q{
    width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:0 20px;font-size:16px;font-weight:600;text-align:left;color:var(--txt);
    position:relative;transition:color .2s,background .2s;
  }
  .faq-q::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,#3FF0D0,#16B8D4);
    transform:scaleY(0);transform-origin:top;transition:transform .24s ease-out;
  }
  .faq-q:hover{color:var(--brand-2);background:rgba(255,255,255,.03)}
  .faq-item.open .faq-q{color:var(--brand-2)}
  .faq-item.open .faq-q::before{transform:scaleY(1)}
  .faq-q i{transition:transform .24s ease-out;color:var(--brand-2);font-size:14px}
  .faq-item.open .faq-q i{transform:rotate(45deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
  .faq-a p{padding:0 20px 20px;max-width:68ch;font-size:15px;line-height:1.8;color:var(--txt-2)}

  /* 页脚 */
  .site-footer{background:var(--bg-deep);border-top:1px solid var(--line);margin-top:64px;padding:56px 0 0}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
  .footer-title{font-size:13px;letter-spacing:.18em;color:var(--txt-3);margin-bottom:14px}
  .footer-link{display:block;line-height:36px;font-size:14px;color:var(--txt-2);transition:color .2s,transform .2s}
  .footer-link:hover{color:var(--brand-2);transform:translateX(2px)}
  .footer-bottom{
    margin-top:44px;border-top:1px solid var(--line);padding:18px 0;
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    font-size:13px;color:var(--txt-3);
  }
  .to-top{display:inline-flex;align-items:center;gap:6px;color:var(--txt-2)}
  .to-top:hover{color:var(--brand-2)}

  /* 动画 */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
  .reveal.is-visible{opacity:1;transform:none}

  @media (prefers-reduced-motion: reduce){
    *{animation:none !important;transition:none !important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
  }

/* roulang page: article */
:root{
  --bg-deep:#04121C;
  --bg-base:#071E2C;
  --bg-panel:#0B2A3C;
  --brand:#16B8D4;
  --brand-2:#3FF0D0;
  --accent:#FFB25B;
  --txt:#E6F3F8;
  --txt-2:#A7C2CE;
  --txt-3:#6C8896;
  --line:rgba(120,230,240,.14);
  --line-strong:rgba(120,230,240,.28);
  --r-s:10px;
  --r-m:16px;
  --r-l:20px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 18px 40px -18px rgba(22,184,212,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg-base);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='48' viewBox='0 0 56 48'%3E%3Cpath fill='none' stroke='%2316B8D4' stroke-width='1' d='M28 1 41 8.5v15L28 31 15 23.5v-15zM15 23.5 2 31v15l13 7.5L28 46V31zM41 23.5 54 31v15l-13 7.5L28 46V31z'/%3E%3C/svg%3E"),
    radial-gradient(900px 520px at 12% -8%, rgba(22,184,212,.16), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(63,240,208,.10), transparent 60%);
  background-attachment:fixed;
  color:var(--txt);
  font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;border:0}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul,ol{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
::selection{background:rgba(63,240,208,.28);color:#04121C}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(4,18,28,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.site-header.compact{box-shadow:0 14px 36px -22px rgba(0,0,0,.9)}
.nav-top{
  display:flex;align-items:center;gap:20px;height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  color:#04121C;font-weight:800;font-size:17px;
  box-shadow:0 0 0 1px rgba(63,240,208,.4),0 10px 24px -12px rgba(22,184,212,.8);
}
.brand-word{display:flex;flex-direction:column;line-height:1.12}
.brand-word b{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-word span{font-size:12px;color:var(--txt-3);letter-spacing:.14em}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:360px;max-width:38vw;height:40px;padding:0 14px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.22)}
.search-box i{color:var(--txt-3);font-size:13px}
.search-box input{flex:1;min-width:0;background:none;border:0;outline:none;font-size:14px}
.search-box input::placeholder{color:var(--txt-3)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-text-link{
  padding:8px 12px;border-radius:999px;font-size:14px;color:var(--txt-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-text-link:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.nav-text-link.active{color:var(--brand-2);background:rgba(22,184,212,.12)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border:0;border-radius:999px;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  color:#04121C;
  box-shadow:0 0 0 1px rgba(63,240,208,.45),0 10px 28px -8px rgba(22,184,212,.6);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(63,240,208,.5),0 14px 32px -6px rgba(22,184,212,.7)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.45),0 6px 18px -8px rgba(22,184,212,.6)}
.btn-ghost{
  background:transparent;color:var(--txt);border:1px solid rgba(22,184,212,.55);
}
.btn-ghost:hover{background:rgba(22,184,212,.1);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible,.nav-text-link:focus-visible,.channel-pill:focus-visible,.footer-link:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}
.btn-block{width:100%}
.nav-burger{
  display:none;width:40px;height:40px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--txt);cursor:pointer;
}
.channel-bar{border-top:1px solid rgba(120,230,240,.08);background:rgba(4,18,28,.5)}
.channel-inner{
  display:flex;align-items:center;gap:8px;height:48px;
  overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none}
.channel-pill{
  flex:0 0 auto;scroll-snap-align:start;
  padding:6px 14px;border-radius:999px;font-size:14px;color:var(--txt-2);
  border:1px solid transparent;position:relative;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.channel-pill:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.channel-pill.active{
  color:var(--brand-2);border-color:rgba(22,184,212,.5);
  background:rgba(22,184,212,.12);
}
.channel-pill.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.site-header.compact .channel-inner{height:34px}
.mobile-drawer{
  display:none;position:fixed;inset:64px 0 0 0;z-index:70;
  background:rgba(4,18,28,.97);backdrop-filter:blur(12px);
  padding:20px;overflow-y:auto;
}
.mobile-drawer.open{display:block}
.drawer-title{font-size:12px;letter-spacing:.16em;color:var(--txt-3);margin:8px 0 10px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px;color:var(--txt-2);
}
.drawer-link:hover{color:var(--brand-2)}
.mobile-drawer .btn{margin-top:20px}

/* ============ 面包屑与文章头 ============ */
.page-main{padding:34px 0 0;position:relative;z-index:1}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--txt-3);padding-bottom:22px;
}
.breadcrumb a{color:var(--txt-2)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb .sep{color:rgba(108,136,150,.7)}
.breadcrumb .current{
  color:var(--txt-3);max-width:38ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:48px;
  align-items:start;padding-bottom:80px;
}
.article-main{min-width:0}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;letter-spacing:.06em;
  color:var(--brand-2);background:rgba(22,184,212,.12);
  border:1px solid rgba(22,184,212,.42);
}
.badge-accent{color:var(--accent);background:rgba(255,178,91,.1);border-color:rgba(255,178,91,.4)}
.article-title{
  font-size:clamp(1.7rem,3.6vw,2.6rem);
  font-weight:800;line-height:1.24;letter-spacing:-.01em;
  margin:18px 0 16px;
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--txt-3);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.meta-row .dot{color:rgba(108,136,150,.55)}
.meta-row span{white-space:nowrap}
.cover{
  margin:28px 0 34px;border-radius:var(--r-l);overflow:hidden;
  position:relative;background:var(--bg-panel);border:1px solid var(--line);
}
.cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.cover:hover img{transform:scale(1.03)}
.cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(4,18,28,.05) 40%,rgba(4,18,28,.62));
  pointer-events:none;
}
.cover figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 20px;
  font-size:13px;color:var(--txt-2);z-index:1;
}

/* ============ 正文 ============ */
.article-body{
  max-width:760px;
  font-size:17px;line-height:1.9;color:#DCEAF2;
}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(1.2rem,2.3vw,1.55rem);font-weight:700;line-height:1.45;
  margin:2.2em 0 .9em;padding-left:14px;position:relative;color:var(--txt);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand-2),var(--brand));
}
.article-body h3{font-size:18px;font-weight:600;margin:1.8em 0 .6em;color:var(--txt)}
.article-body ul{list-style:none;padding-left:0;margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.5em}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;
  background:var(--brand-2);opacity:.85;
}
.article-body ol{padding-left:1.4em;margin:0 0 1.2em}
.article-body ol li{margin-bottom:.5em}
.article-body ol li::marker{color:var(--brand-2);font-family:ui-monospace,monospace}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;border-left:3px solid var(--brand);
  border-radius:0 14px 14px 0;
  background:rgba(255,255,255,.05);backdrop-filter:blur(10px);
  color:var(--txt-2);font-size:16px;
}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:rgba(22,184,212,.1);color:var(--txt);font-weight:600}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.article-body img{border-radius:14px;margin:1.6em auto;max-width:100%;height:auto}
.article-body a{color:var(--brand-2);border-bottom:1px solid rgba(63,240,208,.42)}
.article-body a:hover{border-bottom-color:var(--brand-2)}
.article-body strong{color:#F2FBFF}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ============ 标签 / 翻页 ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 0;padding-top:24px;border-top:1px solid var(--line)}
.tag{
  padding:5px 13px;border-radius:8px;font-size:12.5px;
  color:var(--brand-2);background:rgba(22,184,212,.1);
  border:1px solid rgba(22,184,212,.3);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.tag:hover{background:rgba(22,184,212,.2);transform:translateY(-2px)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:34px 0 0}
.pager-item{
  display:block;padding:18px 20px;border-radius:var(--r-m);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.pager-item:hover{border-color:rgba(22,184,212,.5);transform:translateY(-2px);background:rgba(22,184,212,.07)}
.pager-item .k{font-size:12px;letter-spacing:.14em;color:var(--txt-3)}
.pager-item .t{font-size:15px;color:var(--txt);margin-top:6px;display:block}
.pager-item.next{text-align:right}

/* ============ 侧栏 TOC ============ */
.side-col{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px}
.side-card{
  border-radius:var(--r-m);padding:18px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  position:relative;overflow:hidden;
}
.side-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(63,240,208,.7),transparent);
}
.side-title{font-size:12px;letter-spacing:.16em;color:var(--txt-3);margin-bottom:12px}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:52vh;overflow-y:auto;scrollbar-width:thin}
.toc-link{
  display:block;padding:7px 10px;border-radius:8px;font-size:13.5px;color:var(--txt-2);
  border-left:2px solid transparent;line-height:1.5;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.toc-link:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.toc-link.toc-sub{padding-left:22px;font-size:13px;color:var(--txt-3)}
.toc-link.active{
  color:var(--brand-2);background:rgba(22,184,212,.12);
  border-left-color:var(--brand-2);
  box-shadow:inset 0 0 18px -10px rgba(63,240,208,.9);
}
.side-links{display:flex;flex-direction:column;gap:2px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:9px 8px;border-radius:8px;font-size:14px;color:var(--txt-2);
  transition:color .2s var(--ease),background .2s var(--ease),padding .2s var(--ease);
}
.side-links a:hover{color:var(--brand-2);background:rgba(255,255,255,.05);padding-left:12px}
.side-links i{font-size:11px;opacity:.7}
.toc-mobile{display:none;margin-bottom:26px}
.toc-mobile summary{
  cursor:pointer;list-style:none;padding:14px 18px;border-radius:var(--r-m);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:14px;color:var(--txt-2);
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile[open] summary{border-color:rgba(22,184,212,.5);color:var(--brand-2)}
.toc-mobile .toc-list{padding:12px 6px 4px}

/* ============ 相关推荐 ============ */
.rec-section{padding:0 0 84px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{font-size:26px;font-weight:700}
.sec-head .sub{font-size:14px;color:var(--txt-3);margin-top:8px}
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rec-card{
  display:flex;flex-direction:column;border-radius:var(--r-l);overflow:hidden;
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.rec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,184,212,.45)}
.rec-thumb{position:relative;overflow:hidden}
.rec-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease-out}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,18,28,0) 45%,rgba(4,18,28,.7))}
.rec-thumb .badge{position:absolute;left:12px;top:12px;z-index:1}
.rec-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-body h3{font-size:16.5px;font-weight:600;line-height:1.5}
.rec-body p{font-size:13.5px;color:var(--txt-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-more{margin-top:auto;font-size:13.5px;color:var(--brand-2);display:inline-flex;align-items:center;gap:8px}
.rec-more i{transition:transform .2s ease-out}
.rec-card:hover .rec-more i{transform:translateX(4px)}

/* ============ CTA ============ */
.cta-band{
  border-radius:var(--r-l);padding:36px 40px;margin-bottom:84px;
  background:linear-gradient(120deg,rgba(22,184,212,.18),rgba(63,240,208,.08));
  border:1px solid rgba(120,230,240,.2);
  backdrop-filter:blur(12px);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band h2{font-size:24px}
.cta-band p{color:var(--txt-2);font-size:14.5px;margin-top:8px;max-width:56ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 空态 ============ */
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;border-radius:var(--r-l);border:1px dashed var(--line-strong);
  background:rgba(255,255,255,.03);padding:36px 20px;text-align:center;
}
.empty-state i{font-size:44px;color:rgba(22,184,212,.4)}
.empty-state p{font-size:14px;color:var(--txt-2)}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);margin-top:auto}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;
  padding:60px 0 36px;
}
.footer-title{font-size:13px;letter-spacing:.16em;color:var(--txt-3);margin-bottom:14px}
.footer-link{
  display:block;font-size:14px;color:var(--txt-2);line-height:36px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
a.footer-link:hover{color:var(--brand-2);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 30px;border-top:1px solid var(--line);
  font-size:13px;color:var(--txt-3);
}
.to-top{color:var(--txt-2);display:inline-flex;align-items:center;gap:8px}
.to-top:hover{color:var(--brand-2)}
.text-txt2{color:var(--txt-2)}
.text-txt3{color:var(--txt-3)}
.text-sm{font-size:14px}
.mt-4{margin-top:16px}
.max-w-\[34ch\]{max-width:34ch}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .side-col{display:none}
  .toc-mobile{display:block}
}
@media (max-width:1023px){
  .nav-links{display:none !important}
  .nav-burger{display:grid;place-items:center}
  .search-box{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:48px 0 30px}
  .rec-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .page-main{padding-top:24px}
  .article-title{margin:14px 0 12px}
  .article-body{font-size:16.5px;line-height:1.85}
  .pager{grid-template-columns:1fr}
  .pager-item.next{text-align:left}
  .cta-band{padding:26px 22px;margin-bottom:64px}
  .rec-grid{grid-template-columns:1fr}
  .rec-section{padding-bottom:64px}
  .sec-head{flex-direction:column;align-items:flex-start}
}
@media (max-width:519px){
  .brand-word span{display:none}
  .footer-grid{grid-template-columns:1fr}
  .article-body h2{margin-top:1.8em}
  .meta-row{font-size:12px;gap:8px}
}

/* roulang page: category1 */
:root{
  --bg-deep:#04121C;
  --bg-base:#071E2C;
  --bg-panel:#0B2A3C;
  --brand:#16B8D4;
  --brand-2:#3FF0D0;
  --accent:#FFB25B;
  --text:#E6F3F8;
  --text-2:#A7C2CE;
  --text-3:#6C8896;
  --line:rgba(120,230,240,.14);
  --line-strong:rgba(120,230,240,.28);
  --r-sm:10px;
  --r:16px;
  --r-lg:20px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 18px 40px -18px rgba(22,184,212,.45);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text);
  font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(circle,rgba(63,240,208,.09) 0 1px,transparent 1.6px);
  background-size:26px 26px;
  opacity:.5;
}
@media (max-width:767px){body::before{display:none}}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
ul,ol{margin:0;padding:0}
p{margin:0}
h1,h2,h3,h4{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}
@media (min-width:1400px){.container{max-width:1280px}}

/* ---------- 顶部导航 ---------- */
.site-header{position:relative;z-index:60;padding-top:64px}
.header-bar{
  position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  background:rgba(4,18,28,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  font-weight:700;font-size:17px;color:#04121C;
  background:linear-gradient(135deg,var(--brand-2),var(--brand));
  box-shadow:0 6px 18px -8px rgba(22,184,212,.8);
}
.brand-word{display:flex;flex-direction:column;line-height:1.15}
.brand-word b{font-size:15px;font-weight:700;letter-spacing:.01em;color:var(--text)}
.brand-word span{font-size:11px;color:var(--text-3);letter-spacing:.14em}
.search-box{
  display:none;align-items:center;gap:8px;height:40px;padding:0 14px;flex:1;max-width:420px;
  border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text-3);transition:border-color .2s,box-shadow .2s;
}
.search-box i{font-size:13px;color:var(--text-3)}
.search-box input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--text);font-size:14px}
.search-box input::placeholder{color:var(--text-3)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25)}
@media (min-width:1024px){.search-box{display:flex}}
.nav-links{margin-left:auto}
.nav-links{align-items:center;gap:22px}
.nav-text-link{font-size:14px;color:var(--text-2);transition:color .2s ease;white-space:nowrap}
.nav-text-link:hover{color:var(--brand-2)}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;flex:none;
  border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text);transition:all .2s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand-2)}
.icon-btn:focus-visible,.btn:focus-visible,.tab:focus-visible,.anchor-link:focus-visible,.footer-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
@media (min-width:1024px){.icon-btn.search-toggle,.icon-btn.menu-btn{display:none!important}}
@media (max-width:479px){
  .brand-word span{display:none}
  .brand-word b{font-size:14px}
  .brand-mark{width:32px;height:32px;border-radius:10px;font-size:15px}
  .btn-header{padding:0 12px!important;font-size:12px!important;height:34px!important}
}
.mobile-panel{display:none;background:rgba(4,18,28,.97);border-bottom:1px solid var(--line)}
.mobile-panel.open{display:block}
.mobile-search{padding:12px 0}
.mobile-search .search-box{display:flex;max-width:none;width:100%}
.mobile-menu{padding:8px 0 18px}
.mm-link{display:block;padding:12px 2px;font-size:15px;color:var(--text-2);border-bottom:1px solid rgba(120,230,240,.08);transition:color .2s}
.mm-link:hover,.mm-link.is-active{color:var(--brand-2)}
.mm-actions{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
@media (min-width:1024px){.mobile-panel{display:none!important}}

.tabs-bar{
  position:relative;z-index:50;
  background:rgba(7,30,44,.75);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.tabs-wrap{height:48px;display:flex;align-items:center;position:relative}
.tabs-wrap::before,
.tabs-wrap::after{
  content:"";position:absolute;top:0;bottom:0;width:24px;pointer-events:none;z-index:2;
}
.tabs-wrap::before{left:-1px;background:linear-gradient(90deg,rgba(7,30,44,.95),transparent)}
.tabs-wrap::after{right:-1px;background:linear-gradient(270deg,rgba(7,30,44,.95),transparent)}
.tabs-scroll{
  display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x proximity;
  -ms-overflow-style:none;scrollbar-width:none;padding:0 6px;width:100%;
}
.tabs-scroll::-webkit-scrollbar{display:none}
.tab{
  position:relative;flex:none;scroll-snap-align:start;display:inline-flex;align-items:center;
  height:32px;padding:0 14px;border-radius:999px;font-size:13px;color:var(--text-2);
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.tab:hover{color:var(--text);background:rgba(255,255,255,.04)}
.tab.is-active{color:var(--brand-2);border-color:var(--brand);background:rgba(22,184,212,.12)}
.tab.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-9px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;transition:all .2s ease-out;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-2),var(--brand));color:#04121C;
  box-shadow:0 0 0 1px rgba(63,240,208,.45),0 10px 28px -8px rgba(22,184,212,.6);
}
.btn-primary:hover{
  filter:brightness(1.08);transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(63,240,208,.55),0 14px 32px -8px rgba(22,184,212,.7);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.4),0 6px 18px -10px rgba(22,184,212,.55)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{background:rgba(22,184,212,.08);border-color:var(--brand);color:var(--brand-2);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:13px}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  padding:56px 0 48px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(rgba(4,18,28,.62),rgba(4,18,28,.9)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 85% at 82% 118%,rgba(22,184,212,.18),transparent 62%);
}
.page-head .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px}
.breadcrumb a{color:var(--text-3);transition:color .2s}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb span.sep{opacity:.5}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.08em;color:var(--brand-2);
  background:rgba(22,184,212,.12);border:1px solid rgba(22,184,212,.35);
}
.page-head-grid{display:grid;gap:32px}
@media (min-width:1024px){.page-head-grid{grid-template-columns:minmax(0,1fr) 264px;align-items:start}}
.page-title{
  font-size:clamp(1.9rem,3.8vw,2.8rem);
  font-weight:800;line-height:1.2;letter-spacing:-.01em;
  margin:16px 0 14px;
}
.page-lead{color:var(--text-2);font-size:17px;line-height:1.72;max-width:54ch}
.page-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

.anchor-nav{
  position:relative;overflow:hidden;padding:14px;border-radius:var(--r);
  background:rgba(255,255,255,.05);border:1px solid var(--line);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.anchor-nav::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(63,240,208,.6),transparent);
}
.anchor-title{font-size:12px;letter-spacing:.16em;color:var(--text-3);margin-bottom:10px}
.anchor-links{display:flex;gap:8px;overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none}
.anchor-links::-webkit-scrollbar{display:none}
.anchor-link{
  flex:none;white-space:nowrap;display:block;padding:8px 12px;border-radius:10px;
  font-size:14px;color:var(--text-2);border:1px solid var(--line);transition:all .2s ease;
}
.anchor-link:hover{color:var(--brand-2);background:rgba(22,184,212,.08);border-color:var(--brand)}
@media (min-width:1024px){
  .anchor-nav{position:sticky;top:88px}
  .anchor-links{display:block;overflow:visible}
  .anchor-link{border-color:transparent;padding:8px 10px}
}

/* ---------- 板块 ---------- */
.section{position:relative;z-index:1;padding:56px 0}
.section-tight{padding:40px 0}
@media (min-width:768px){.section{padding:72px 0}.section-tight{padding:52px 0}}
@media (min-width:1024px){.section{padding:96px 0}.section-tight{padding:64px 0}}
.section-alt{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;color:var(--brand)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:32px}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;line-height:1.3;margin:10px 0 8px}
.section-head p{color:var(--text-2);font-size:15px;max-width:60ch}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand);transition:color .2s}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover{color:var(--brand-2)}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- 内容双栏 ---------- */
.content-grid{display:grid;gap:40px}
@media (min-width:1024px){.content-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:48px;align-items:start}}
.content-block{
  padding-bottom:36px;margin-bottom:36px;border-bottom:1px solid rgba(120,230,240,.1);
}
.content-block:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0}
.block-index{
  display:block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:12px;letter-spacing:.2em;color:var(--brand);margin-bottom:8px;
}
.content-block h2{font-size:clamp(1.3rem,2.2vw,1.7rem);font-weight:700;line-height:1.35;margin-bottom:16px}
.content-block p{color:var(--text-2);margin-bottom:12px;max-width:68ch}
.content-block p:last-child{margin-bottom:0}
.block-figure{
  position:relative;margin:0 0 20px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:16/9;background:var(--bg-panel);
}
.block-figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.block-figure:hover img{transform:scale(1.03)}
.block-figure::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(4,18,28,.08),rgba(4,18,28,.6));
}
.block-figure figcaption{
  position:absolute;left:16px;right:16px;bottom:12px;z-index:2;
  font-size:12px;color:var(--text-2);letter-spacing:.02em;
}

.side-col{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.side-col{position:sticky;top:88px}}
.side-card{
  padding:20px;border-radius:var(--r);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(12px);box-shadow:var(--shadow-card);
}
.side-card-title{font-size:13px;letter-spacing:.12em;color:var(--text-3);margin-bottom:14px}
.side-btn{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  height:46px;padding:0 14px;margin-bottom:10px;border-radius:var(--r-sm);
  border:1px solid var(--line);font-size:14px;color:var(--text);transition:all .2s ease;
}
.side-btn:last-child{margin-bottom:0}
.side-btn i{color:var(--text-3);transition:transform .2s ease,color .2s}
.side-btn:hover{border-color:var(--brand);background:rgba(22,184,212,.1);color:var(--brand-2);transform:translateX(2px)}
.side-btn:hover i{color:var(--brand-2);transform:translateX(4px)}
.bullet-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.bullet-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-2)}
.bullet-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand-2),var(--brand));
}

/* ---------- 渠道列表 ---------- */
.channel-list{list-style:none;border-top:1px solid var(--line)}
.channel-row{
  display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:14px;
  min-height:64px;padding:10px 12px;border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.channel-row:hover{background:rgba(255,255,255,.04)}
.channel-no{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;color:var(--text-3)}
.channel-name{font-size:15px;font-weight:600;color:var(--text);transition:color .2s ease}
.channel-desc{
  display:block;font-size:13px;color:var(--text-3);margin-top:2px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.channel-right{display:flex;align-items:center;gap:10px}
.channel-right i{color:var(--text-3);font-size:13px;transition:transform .2s ease,color .2s}
.channel-row:hover .channel-name{color:var(--brand-2)}
.channel-row:hover .channel-right i{color:var(--brand-2);transform:translateX(4px)}
.tag-chip{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  font-size:12px;white-space:nowrap;color:var(--brand-2);
  background:rgba(22,184,212,.12);border:1px solid rgba(22,184,212,.28);
}
.tag-chip.is-accent{color:var(--accent);background:rgba(255,178,91,.12);border-color:rgba(255,178,91,.3)}
@media (max-width:519px){
  .channel-row{grid-template-columns:34px minmax(0,1fr) auto;gap:10px;padding:10px 4px}
  .channel-desc{max-width:52vw}
}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 4px 14px 16px;position:relative;
  font-size:16px;font-weight:600;color:var(--text);cursor:pointer;transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;
  background:linear-gradient(180deg,var(--brand-2),var(--brand));
  transition:height .24s ease;
}
.faq-item[open] summary::before{height:62%}
.faq-item summary:hover{color:var(--brand-2)}
.faq-item summary i{color:var(--brand);font-size:14px;transition:transform .24s ease}
.faq-item[open] summary i{transform:rotate(45deg)}
.faq-a{padding:0 4px 20px 16px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:68ch}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;display:flex;flex-wrap:wrap;gap:24px;
  align-items:center;justify-content:space-between;
  padding:34px 26px;border-radius:var(--r-lg);border:1px solid var(--line);
  background-image:linear-gradient(120deg,rgba(22,184,212,.2),rgba(4,18,28,.92) 62%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-card);
}
@media (min-width:768px){.cta-band{padding:42px 40px}}
.cta-band h2{font-size:clamp(1.35rem,2.4vw,1.9rem);font-weight:700;line-height:1.3;margin-bottom:8px}
.cta-band p{color:var(--text-2);font-size:15px;max-width:48ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;background:var(--bg-deep);
  border-top:1px solid var(--line);padding:56px 0 0;
}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.footer-title{font-size:13px;letter-spacing:.14em;color:var(--text-3);margin-bottom:14px}
.footer-link{display:block;line-height:36px;font-size:14px;color:var(--text-2);transition:all .2s ease}
.footer-link:hover{color:var(--brand-2);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:40px;padding:20px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);font-size:13px;transition:color .2s}
.to-top:hover{color:var(--brand-2)}

/* ---------- 动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px)}
.reveal{transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.is-visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
    --bg-deep:#04121C;
    --bg-base:#071E2C;
    --bg-panel:#0B2A3C;
    --brand:#16B8D4;
    --brand-2:#3FF0D0;
    --accent:#FFB25B;
    --txt:#E6F3F8;
    --txt-2:#A7C2CE;
    --txt-3:#6C8896;
    --line:rgba(120,230,240,.14);
    --line-2:rgba(120,230,240,.08);
    --r-sm:10px;
    --r-md:16px;
    --r-lg:20px;
    --r-pill:999px;
    --sh-card:0 8px 24px -12px rgba(0,0,0,.6);
    --sh-hover:0 18px 40px -18px rgba(22,184,212,.45);
    --header-h:112px;
  }

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

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

  body{
    margin:0;
    background:var(--bg-base);
    color:var(--txt);
    font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }

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

  .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;}

  .bg-decor{
    position:fixed;inset:0;z-index:-1;pointer-events:none;
    background-image:
      radial-gradient(circle at 18% 8%, rgba(22,184,212,.12), transparent 46%),
      radial-gradient(circle at 86% 2%, rgba(63,240,208,.08), transparent 42%),
      radial-gradient(circle at 50% 100%, rgba(255,178,91,.05), transparent 50%);
  }
  .bg-decor::after{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(rgba(120,230,240,.55) 1px, transparent 1px);
    background-size:26px 26px;
    opacity:.05;
    -webkit-mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 72%);
    mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 72%);
  }

  .container{
    width:100%;
    max-width:1220px;
    margin:0 auto;
    padding:0 20px;
  }
  @media (min-width:1024px){
    .container{padding:0 32px;}
  }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .header-main{
    background:rgba(4,18,28,.88);
    border-bottom:1px solid var(--line-2);
    transition:box-shadow .3s ease;
  }
  .site-header.is-scrolled .header-main{
    box-shadow:0 12px 30px -20px rgba(0,0,0,.9);
    border-bottom-color:var(--line);
  }
  .header-main-inner{
    display:flex;align-items:center;gap:20px;height:64px;
  }

  .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;
    display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#04121C;font-weight:800;font-size:18px;
    box-shadow:0 0 0 1px rgba(63,240,208,.4),0 8px 20px -10px rgba(22,184,212,.8);
  }
  .brand-word{display:flex;flex-direction:column;line-height:1.15;}
  .brand-word b{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--txt);}
  .brand-word span{font-size:11px;letter-spacing:.22em;color:var(--txt-3);}

  .nav-search{
    display:flex;align-items:center;gap:10px;
    height:40px;padding:0 16px;width:360px;max-width:100%;
    border-radius:var(--r-pill);
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .nav-search i{color:var(--txt-3);font-size:13px;}
  .nav-search input{
    background:transparent;border:0;outline:none;
    color:var(--txt);font-size:14px;width:100%;
  }
  .nav-search input::placeholder{color:var(--txt-3);}
  .nav-search:focus-within{
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(22,184,212,.25);
  }

  .nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
  .nav-text-link{
    color:var(--txt-2);font-size:14px;padding:8px 12px;border-radius:var(--r-sm);
    transition:color .2s ease, background .2s ease;
  }
  .nav-text-link:hover{color:var(--brand-2);background:rgba(255,255,255,.05);}
  .nav-text-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

  .nav-burger{
    margin-left:auto;
    width:40px;height:40px;border-radius:var(--r-sm);
    display:inline-flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.05);border:1px solid var(--line);
    color:var(--txt);cursor:pointer;transition:background .2s ease;
  }
  .nav-burger:hover{background:rgba(22,184,212,.14);}

  .mobile-menu{
    display:none;
    background:rgba(4,18,28,.98);
    border-bottom:1px solid var(--line);
    padding:14px 0 20px;
  }
  .mobile-menu.is-open{display:block;}
  .mobile-menu a{
    display:block;padding:12px 4px;color:var(--txt-2);font-size:15px;
    border-bottom:1px solid var(--line-2);
  }
  .mobile-menu a:last-child{border-bottom:0;}
  .mobile-menu a:hover{color:var(--brand-2);}

  /* ---------- Tabs ---------- */
  .header-tabs{
    background:rgba(7,30,44,.92);
    border-bottom:1px solid var(--line-2);
  }
  .tabs-scroll{
    display:flex;align-items:center;gap:8px;height:48px;
    overflow-x:auto;scroll-snap-type:x proximity;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .tabs-scroll::-webkit-scrollbar{display:none;}
  .tab-pill{
    flex:0 0 auto;scroll-snap-align:start;
    height:34px;display:inline-flex;align-items:center;
    padding:0 16px;border-radius:var(--r-pill);
    font-size:14px;color:var(--txt-2);white-space:nowrap;
    border:1px solid transparent;
    transition:color .2s ease, background .2s ease, border-color .2s ease;
  }
  .tab-pill:hover{color:var(--txt);background:rgba(255,255,255,.05);}
  .tab-pill.is-active{
    color:var(--brand-2);
    border-color:rgba(22,184,212,.6);
    background:rgba(22,184,212,.12);
    box-shadow:inset 0 -2px 0 var(--brand-2);
  }
  .tab-pill:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-pill);
    font-weight:600;cursor:pointer;border:1px solid transparent;
    transition:transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out, filter .2s ease-out, color .2s ease-out;
  }
  .btn-sm{height:38px;padding:0 18px;font-size:14px;}
  .btn-lg{height:52px;padding:0 30px;font-size:16px;}
  .btn-primary{
    background:linear-gradient(120deg,var(--brand),var(--brand-2));
    color:#04121C;
    box-shadow:0 0 0 1px rgba(63,240,208,.45), 0 10px 28px -8px rgba(22,184,212,.6);
  }
  .btn-primary:hover{
    filter:brightness(1.08);transform:translateY(-2px);
    box-shadow:0 0 0 1px rgba(63,240,208,.55), 0 14px 32px -8px rgba(22,184,212,.75);
  }
  .btn-primary:active{
    transform:translateY(0);
    box-shadow:0 0 0 1px rgba(63,240,208,.4), 0 6px 16px -8px rgba(22,184,212,.5);
  }
  .btn-ghost{
    background:transparent;border-color:rgba(22,184,212,.55);color:var(--brand-2);
  }
  .btn-ghost:hover{background:rgba(22,184,212,.1);transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

  /* ---------- Badges & tags ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    height:26px;padding:0 12px;border-radius:var(--r-pill);
    font-size:12px;letter-spacing:.06em;
    color:var(--brand-2);
    background:rgba(22,184,212,.12);
    border:1px solid rgba(22,184,212,.32);
  }
  .badge-amber{
    color:var(--accent);
    background:rgba(255,178,91,.12);
    border-color:rgba(255,178,91,.34);
  }

  /* ---------- Page hero ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    padding:60px 0 52px;
    border-bottom:1px solid var(--line-2);
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;
    opacity:.5;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(140deg, rgba(4,18,28,.72) 0%, rgba(4,18,28,.9) 55%, rgba(7,30,44,.96) 100%);
  }
  .hero-grid{
    position:relative;z-index:2;
    display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
    gap:44px;align-items:center;
  }
  .hero-title{
    font-size:clamp(2rem,4.2vw,3.1rem);
    font-weight:800;line-height:1.18;letter-spacing:-.01em;
    margin:18px 0 14px;
  }
  .hero-title em{
    font-style:normal;
    background:linear-gradient(100deg,var(--brand-2),var(--brand));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-lead{
    font-size:16px;color:var(--txt-2);max-width:44ch;
  }
  .hero-meta{
    display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;
  }

  .glass{
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:var(--sh-card);
    position:relative;
    overflow:hidden;
  }
  .glass::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(120,230,240,.55),transparent);
  }

  .hero-card{padding:24px;}
  .hero-card .card-head{
    display:flex;align-items:center;justify-content:space-between;
    gap:12px;padding-bottom:14px;margin-bottom:6px;
    border-bottom:1px solid var(--line-2);
  }
  .hero-card .card-head h2{font-size:16px;font-weight:600;}
  .flow-list li{
    display:flex;align-items:center;gap:12px;
    padding:11px 0;border-bottom:1px dashed var(--line-2);
    font-size:14px;color:var(--txt-2);
  }
  .flow-list li:last-child{border-bottom:0;}
  .flow-list .num{
    flex:0 0 auto;width:26px;height:26px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:12px;color:var(--brand-2);
    background:rgba(22,184,212,.12);
    border:1px solid rgba(22,184,212,.35);
  }

  /* ---------- Anchor bar ---------- */
  .anchor-bar{
    position:sticky;top:var(--header-h);z-index:40;
    background:rgba(4,18,28,.9);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line-2);
  }
  .anchor-scroll{
    display:flex;align-items:center;gap:10px;height:56px;
    overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  }
  .anchor-scroll::-webkit-scrollbar{display:none;}
  .anchor-pill{
    flex:0 0 auto;
    display:inline-flex;align-items:center;gap:8px;
    height:34px;padding:0 16px;border-radius:var(--r-pill);
    font-size:14px;color:var(--txt-2);
    border:1px solid var(--line);
    background:rgba(255,255,255,.03);
    transition:color .2s ease, border-color .2s ease, background .2s ease;
  }
  .anchor-pill i{font-size:12px;color:var(--brand);}
  .anchor-pill:hover,.anchor-pill.is-active{
    color:var(--brand-2);border-color:rgba(22,184,212,.55);background:rgba(22,184,212,.1);
  }

  /* ---------- Sections ---------- */
  .section{padding:88px 0;}
  .section-tight{padding:64px 0;}
  .section-head{max-width:720px;margin-bottom:44px;}
  .section-head .eyebrow{
    font-size:12px;letter-spacing:.22em;color:var(--brand);text-transform:uppercase;
    display:inline-flex;align-items:center;gap:8px;
  }
  .section-head .eyebrow::before{
    content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand),transparent);
  }
  .section-head h2{
    font-size:clamp(1.5rem,2.4vw,2.1rem);
    font-weight:700;line-height:1.3;margin:14px 0 12px;
  }
  .section-head p{color:var(--txt-2);font-size:15px;max-width:60ch;}

  /* ---------- Steps (zigzag) ---------- */
  .timeline{position:relative;}
  .step-item{
    display:grid;
    grid-template-columns:minmax(0,1fr) 96px minmax(0,1fr);
    gap:32px;align-items:center;
    padding:34px 0;
    position:relative;
  }
  .step-item + .step-item{border-top:1px dashed var(--line-2);}
  .step-node{
    grid-area:1/2/2/3;justify-self:center;
    width:60px;height:60px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    font-size:19px;font-weight:700;
    color:#04121C;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    background:linear-gradient(140deg,var(--brand),var(--brand-2));
    box-shadow:0 0 0 1px rgba(63,240,208,.5), 0 0 0 8px rgba(22,184,212,.08), 0 14px 30px -14px rgba(22,184,212,.9);
  }
  .step-text{grid-area:1/1/2/2;}
  .step-media{grid-area:1/3/2/4;}
  .step-item.reverse .step-text{grid-area:1/3/2/4;}
  .step-item.reverse .step-media{grid-area:1/1/2/2;}
  .step-text h3{
    font-size:19px;font-weight:600;margin:10px 0 10px;
  }
  .step-text p{color:var(--txt-2);font-size:15px;max-width:52ch;}
  .step-media{
    border-radius:var(--r-lg);overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--sh-card);
    background:var(--bg-panel);
  }
  .step-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:0;transition:transform .3s ease;
  }
  .step-media:hover img{transform:scale(1.03);}
  .step-tip{
    display:inline-flex;align-items:flex-start;gap:8px;
    margin-top:14px;padding:10px 14px;
    border-radius:var(--r-sm);
    background:rgba(255,178,91,.08);
    border:1px solid rgba(255,178,91,.24);
    color:var(--accent);font-size:13px;line-height:1.6;
  }
  .step-tip i{margin-top:4px;font-size:12px;}

  /* ---------- Checklist ---------- */
  .checklist-grid{
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;
  }
  .check-card{
    display:flex;gap:16px;align-items:flex-start;
    padding:22px;border-radius:var(--r-md);
    background:rgba(255,255,255,.035);
    border:1px solid var(--line);
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .check-card:hover{
    transform:translateY(-3px);
    border-color:rgba(22,184,212,.4);
    box-shadow:var(--sh-hover);
  }
  .check-icon{
    flex:0 0 auto;width:42px;height:42px;border-radius:12px;
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--brand-2);font-size:16px;
    background:rgba(22,184,212,.12);
    border:1px solid rgba(22,184,212,.3);
  }
  .check-card h3{font-size:16px;font-weight:600;margin-bottom:6px;}
  .check-card p{font-size:14px;color:var(--txt-2);}

  /* ---------- Trouble ---------- */
  .trouble-grid{
    display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
    gap:48px;align-items:center;
  }
  .trouble-figure{
    border-radius:var(--r-lg);overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--sh-card);
  }
  .trouble-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:0;}
  .trouble-list li{
    display:flex;gap:14px;align-items:flex-start;
    padding:16px 18px;border-radius:var(--r-md);
    background:rgba(255,255,255,.03);
    border:1px solid var(--line-2);
    margin-bottom:12px;
    transition:background .2s ease, border-color .2s ease, transform .2s ease-out;
  }
  .trouble-list li:hover{
    background:rgba(22,184,212,.07);
    border-color:rgba(22,184,212,.3);
    transform:translateX(4px);
  }
  .trouble-list .t-icon{
    flex:0 0 auto;width:30px;height:30px;border-radius:9px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:13px;color:var(--brand-2);
    background:rgba(22,184,212,.12);
  }
  .trouble-list b{display:block;font-size:15px;font-weight:600;margin-bottom:2px;}
  .trouble-list span{font-size:14px;color:var(--txt-2);}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:space-between;
    gap:32px;flex-wrap:wrap;
    padding:46px 44px;border-radius:var(--r-lg);
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:var(--sh-card);
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
    opacity:.22;
  }
  .cta-band::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(100deg, rgba(4,18,28,.94), rgba(7,30,44,.82));
  }
  .cta-band > *{position:relative;z-index:2;}
  .cta-band h2{font-size:clamp(1.35rem,2.2vw,1.85rem);font-weight:700;line-height:1.32;}
  .cta-band p{color:var(--txt-2);font-size:15px;margin-top:10px;max-width:46ch;}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

  .to-top-fab{
    position:fixed;right:22px;bottom:26px;z-index:50;
    width:46px;height:46px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--brand-2);font-size:15px;
    background:rgba(11,42,60,.9);
    border:1px solid rgba(22,184,212,.45);
    box-shadow:var(--sh-card);
    transition:transform .2s ease, background .2s ease;
  }
  .to-top-fab:hover{transform:translateY(-3px);background:rgba(22,184,212,.2);}

  /* ---------- Footer ---------- */
  .site-footer{
    background:var(--bg-deep);
    border-top:1px solid var(--line-2);
    padding:64px 0 0;
    margin-top:20px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:44px;
  }
  .footer-title{
    font-size:13px;letter-spacing:.12em;font-weight:600;
    color:var(--txt);margin-bottom:14px;
  }
  .footer-link{
    display:block;color:var(--txt-2);font-size:14px;line-height:36px;
    transition:color .2s ease, transform .2s ease;
  }
  a.footer-link:hover{color:var(--brand-2);transform:translateX(2px);}
  .footer-bottom{
    border-top:1px solid var(--line-2);
    padding:20px 0 26px;
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;flex-wrap:wrap;
    color:var(--txt-3);font-size:13px;
  }
  .to-top{color:var(--txt-2);font-size:13px;display:inline-flex;align-items:center;gap:6px;}
  .to-top:hover{color:var(--brand-2);}

  /* ---------- Reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);}
  .reveal.is-in{
    opacity:1;transform:none;
    transition:opacity .48s cubic-bezier(.22,.61,.36,1), transform .48s cubic-bezier(.22,.61,.36,1);
  }

  /* ---------- Responsive ---------- */
  @media (max-width:1279px){
    .container{max-width:1080px;}
  }

  @media (max-width:1023px){
    :root{--header-h:100px;}
    .header-main-inner{height:56px;}
    .tabs-scroll{height:44px;}
    .hero-grid{grid-template-columns:1fr;gap:32px;}
    .trouble-grid{grid-template-columns:1fr;gap:32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .section{padding:64px 0;}
    .step-item{grid-template-columns:64px minmax(0,1fr);gap:20px;align-items:start;}
    .step-node{
      grid-area:1/1/2/2 !important;justify-self:start;
      width:52px;height:52px;font-size:17px;
    }
    .step-text,.step-item.reverse .step-text{grid-area:1/2/2/3 !important;}
    .step-media,.step-item.reverse .step-media{grid-area:2/2/3/3 !important;}
    .step-item{padding:28px 0;}
  }

  @media (max-width:767px){
    .hero-title{font-size:1.85rem;}
    .checklist-grid{grid-template-columns:1fr;}
    .cta-band{padding:32px 24px;}
    .cta-band h2{font-size:1.35rem;}
    .btn-lg{height:48px;padding:0 22px;font-size:15px;}
    .bg-decor::after{display:none;}
  }

  @media (max-width:520px){
    .container{padding:0 16px;}
    .page-hero{padding:40px 0 36px;}
    .hero-title{font-size:1.6rem;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:32px;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .brand-word span{display:none;}
    .to-top-fab{right:14px;bottom:16px;width:42px;height:42px;}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;}
  }

/* roulang page: category3 */
:root{
  --bg-deep:#04121C;
  --bg-base:#071E2C;
  --bg-panel:#0B2A3C;
  --brand:#16B8D4;
  --brand-2:#3FF0D0;
  --accent:#FFB25B;
  --txt:#E6F3F8;
  --txt2:#A7C2CE;
  --txt3:#6C8896;
  --line:rgba(120,230,240,.14);
  --r-s:10px;
  --r:16px;
  --r-l:20px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 18px 40px -18px rgba(22,184,212,.45);
  --font-sans:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg-base);
  color:var(--txt);
  font-family:var(--font-sans);
  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:
    radial-gradient(rgba(63,240,208,.055) 1px, transparent 1px),
    radial-gradient(ellipse at 85% -12%, rgba(22,184,212,.12), transparent 62%);
  background-size:24px 24px, 100% 100%;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(22,184,212,.35);color:#fff}

/* ===== 布局容器 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){ .container{padding:0 32px} }
@media (min-width:1280px){ .container{max-width:1280px} }
.container-narrow{max-width:840px}
main{position:relative;z-index:1}

.section{padding:56px 0}
@media (min-width:768px){ .section{padding:96px 0} }
.section-tight{padding:40px 0}
@media (min-width:768px){ .section-tight{padding:56px 0} }

.section-head{margin-bottom:28px;max-width:760px}
.section-head h2{font-size:clamp(1.4rem,2.6vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;margin-bottom:10px}
.section-head p{color:var(--txt2);font-size:15px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--brand-2);margin-bottom:10px}

/* ===== 玻璃与卡片 ===== */
.glass{
  position:relative;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.glass::before{
  content:"";
  position:absolute;
  left:12%;right:12%;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(63,240,208,.55),transparent);
  pointer-events:none;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;line-height:1.6;
  color:var(--brand-2);
  background:rgba(22,184,212,.12);
  border:1px solid rgba(63,240,208,.28);
}
.badge-accent{color:var(--accent);background:rgba(255,178,91,.12);border-color:rgba(255,178,91,.35)}
.badge-mute{color:var(--txt2);background:rgba(255,255,255,.05);border-color:var(--line)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04121C;
  box-shadow:0 0 0 1px rgba(63,240,208,.45), 0 10px 28px -8px rgba(22,184,212,.6);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(63,240,208,.55), 0 16px 36px -8px rgba(22,184,212,.7)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.4), 0 6px 18px -8px rgba(22,184,212,.55)}
.btn-ghost{background:transparent;border-color:rgba(22,184,212,.55);color:var(--brand-2)}
.btn-ghost:hover{background:rgba(22,184,212,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
@keyframes breathe{
  0%,100%{box-shadow:0 0 0 1px rgba(63,240,208,.45), 0 10px 28px -8px rgba(22,184,212,.55)}
  50%{box-shadow:0 0 0 1px rgba(63,240,208,.62), 0 10px 34px -6px rgba(22,184,212,.8)}
}
.btn-breathe{animation:breathe 2.4s ease-in-out infinite}
.icon-btn{
  width:38px;height:38px;display:inline-grid;place-items:center;
  border-radius:var(--r-s);border:1px solid var(--line);
  color:var(--txt2);transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(63,240,208,.4);background:rgba(22,184,212,.08)}

/* ===== 顶部双层导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(4,18,28,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-top{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  font-weight:700;font-size:16px;color:#04121C;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(63,240,208,.35), 0 8px 20px -10px rgba(22,184,212,.75);
}
.brand-word{display:flex;flex-direction:column;line-height:1.15}
.brand-word b{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-word span{font-size:12px;color:var(--txt3);letter-spacing:.14em}
.search-box{display:none;position:relative;flex:1 1 auto;max-width:420px;min-width:280px}
@media (min-width:1024px){ .search-box{display:block} }
.search-box i{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--txt3);font-size:14px}
.search-box input{
  width:100%;height:40px;padding:0 16px 0 42px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);color:var(--txt);font-size:14px;
  transition:border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.search-box input::placeholder{color:var(--txt3)}
.search-box input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25);background:rgba(255,255,255,.06)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-links{align-items:center;gap:18px}
.nav-text-link{font-size:14px;color:var(--txt2);padding:6px 2px;position:relative}
.nav-text-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-text-link:hover{color:var(--txt)}
.nav-text-link:hover::after{transform:scaleX(1)}
.nav-text-link.active{color:var(--brand-2)}
.nav-text-link.active::after{transform:scaleX(1)}

.tabs-wrap{border-top:1px solid rgba(120,230,240,.08);position:relative}
.header-tabs{
  display:flex;align-items:center;gap:8px;height:48px;
  overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x proximity;
  -ms-overflow-style:none;scrollbar-width:none;
}
.header-tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:999px;font-size:14px;line-height:1.5;
  color:var(--txt2);border:1px solid transparent;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.tab:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.tab.active{
  color:var(--brand-2);
  border-color:rgba(63,240,208,.45);
  background:rgba(22,184,212,.12);
  box-shadow:inset 0 -2px 0 rgba(63,240,208,.85);
}
.mobile-menu{
  background:rgba(7,30,44,.98);
  border-top:1px solid var(--line);
  padding:6px 0 14px;
}
.mobile-menu a{
  display:block;padding:12px 2px;font-size:15px;color:var(--txt2);
  border-bottom:1px solid rgba(120,230,240,.08);
}
.mobile-menu a:hover{color:var(--txt)}
.mobile-menu a.active{color:var(--brand-2)}

/* ===== 分类页头 ===== */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  background-image:linear-gradient(180deg,rgba(4,18,28,.58),rgba(4,18,28,.9)), url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:120px;
  background:radial-gradient(120% 100% at 50% 100%, rgba(22,184,212,.10), transparent 70%);
  pointer-events:none;
}
.hero-inner{max-width:780px;position:relative;z-index:1}
.hero-inner h1{
  font-size:clamp(1.8rem,3.6vw,2.8rem);
  font-weight:800;line-height:1.2;letter-spacing:-.01em;
  margin:14px 0 12px;
}
.hero-sub{font-size:17px;color:var(--brand-2);font-weight:600}
.hero-desc{margin-top:10px;color:var(--txt2);font-size:15px;max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ===== 指标卡 ===== */
.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (min-width:900px){ .metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px} }
.metric-card{padding:22px 20px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(63,240,208,.32)}
.metric-value{font-family:var(--font-mono);font-size:36px;line-height:1.1;font-weight:600;color:var(--brand-2)}
.metric-value span{font-family:var(--font-sans);font-size:14px;font-weight:500;color:var(--txt3);margin-left:4px}
.metric-label{margin-top:8px;font-size:15px;color:var(--txt);font-weight:600}
.metric-note{margin-top:4px;font-size:13px;color:var(--txt3);line-height:1.6}

/* ===== 瀑布卡片 ===== */
.waterfall{display:grid;grid-template-columns:1fr;gap:20px;align-items:start}
@media (min-width:768px){ .waterfall{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px} }
@media (min-width:1024px){ .waterfall > *:nth-child(even){margin-top:40px} }
.sec-card{
  border-radius:var(--r);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.sec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(63,240,208,.3)}
.sec-card-media{margin:0;aspect-ratio:16/9;overflow:hidden;position:relative}
.sec-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.sec-card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,18,28,.1),rgba(4,18,28,.72))}
.sec-card:hover .sec-card-media img{transform:scale(1.03)}
.sec-card-body{padding:22px 24px 24px;position:relative;z-index:1}
.sec-card-body h3{font-size:19px;font-weight:600;line-height:1.4;margin:12px 0 8px}
.sec-card-body > p{font-size:14px;color:var(--txt2);line-height:1.75}
.check-list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.check-list li{position:relative;padding-left:20px;font-size:14px;color:var(--txt2);line-height:1.7}
.check-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;
  background:rgba(63,240,208,.75);
}
.sec-card-foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.card-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand-2);font-weight:600}
.card-link i{transition:transform .2s ease}
.card-link:hover i{transform:translateX(4px)}

/* ===== 特性条 ===== */
.feature-strip{
  display:grid;grid-template-columns:1fr;gap:8px;
  padding:8px;border-radius:var(--r-l);
}
@media (min-width:768px){ .feature-strip{grid-template-columns:repeat(3,minmax(0,1fr))} }
.feature-item{padding:26px 24px;border-radius:14px;transition:background-color .25s ease}
.feature-item:hover{background:rgba(22,184,212,.07)}
.feature-item i{font-size:22px;color:var(--brand-2)}
.feature-item h3{margin:12px 0 8px;font-size:17px;font-weight:600}
.feature-item p{font-size:14px;color:var(--txt2);line-height:1.75}

/* ===== 处置流程 ===== */
.flow-grid{display:grid;grid-template-columns:1fr;gap:18px;counter-reset:flow}
@media (min-width:768px){ .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (min-width:1100px){ .flow-grid{grid-template-columns:repeat(4,minmax(0,1fr))} }
.flow-item{
  position:relative;padding:24px 22px;border-radius:var(--r);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:transform .25s ease,border-color .25s ease,background-color .25s ease;
}
.flow-item:hover{transform:translateY(-4px);border-color:rgba(63,240,208,.32);background:rgba(22,184,212,.06)}
.flow-num{
  display:grid;place-items:center;width:38px;height:38px;border-radius:50%;
  font-family:var(--font-mono);font-size:15px;color:var(--brand-2);
  border:1px solid rgba(63,240,208,.45);
  box-shadow:0 0 0 4px rgba(22,184,212,.1);
}
.flow-item h3{margin:14px 0 8px;font-size:17px;font-weight:600}
.flow-item p{font-size:14px;color:var(--txt2);line-height:1.75}

/* ===== FAQ ===== */
.faq-item{
  position:relative;margin-bottom:12px;border-radius:14px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  overflow:hidden;
  transition:border-color .22s ease,background-color .22s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:0;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  transition:height .24s ease;
}
.faq-item.open::before{height:100%}
.faq-item:hover{border-color:rgba(63,240,208,.28)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 20px 14px 22px;text-align:left;font-size:16px;color:var(--txt);
}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand-2);font-size:12px;
  transition:transform .24s ease,border-color .24s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:rgba(63,240,208,.45)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:360px}
.faq-a p{padding:0 22px 20px;max-width:68ch;font-size:15px;line-height:1.8;color:var(--txt2)}

/* ===== CTA ===== */
.cta-band{
  display:flex;flex-direction:column;gap:22px;
  padding:32px 26px;border-radius:var(--r-l);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(22,184,212,.16), transparent 60%),
    rgba(255,255,255,.05);
}
@media (min-width:900px){ .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:38px 40px} }
.cta-copy h2{font-size:clamp(1.3rem,2.2vw,1.7rem);font-weight:700;line-height:1.35;margin-bottom:8px}
.cta-copy p{font-size:14px;color:var(--txt2);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-note{margin-top:14px;font-size:13px;color:var(--txt3)}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;z-index:1;margin-top:80px;padding-top:64px;
  background:var(--bg-deep);border-top:1px solid var(--line);
}
@media (min-width:768px){ .site-footer{margin-top:96px} }
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:768px){ .footer-grid{grid-template-columns:1.8fr 1fr 1fr 1.2fr;gap:32px} }
.footer-title{font-size:13px;letter-spacing:.14em;color:var(--txt3);margin-bottom:10px}
.footer-link{display:block;font-size:14px;line-height:36px;color:var(--txt2);transition:color .2s ease,transform .2s ease}
.footer-link:hover{color:var(--brand-2);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--txt3);
}
.to-top{color:var(--txt2);display:inline-flex;align-items:center;gap:6px}
.to-top:hover{color:var(--brand-2)}

/* ===== 入场动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

@media (max-width:767px){
  body::before{display:none}
  .hero-inner h1{margin-top:10px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
    --bg-deep:#04121C;
    --bg-base:#071E2C;
    --bg-panel:#0B2A3C;
    --brand:#16B8D4;
    --brand-2:#3FF0D0;
    --accent:#FFB25B;
    --txt:#E6F3F8;
    --txt-2:#A7C2CE;
    --txt-3:#6C8896;
    --line:rgba(120,230,240,.14);
    --line-strong:rgba(120,230,240,.26);
    --r-sm:10px;
    --r-md:16px;
    --r-lg:20px;
    --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
    --shadow-hover:0 18px 40px -18px rgba(22,184,212,.45);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:132px;}
  body{
    margin:0;
    background:var(--bg-base);
    color:var(--txt);
    font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background-image:radial-gradient(rgba(63,240,208,.05) 1px, transparent 1px);
    background-size:34px 34px;
    opacity:.5;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input{font:inherit;color:inherit;}
  button{background:none;border:0;}
  ul{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
    position:relative;
    z-index:1;
  }
  @media (min-width:1024px){
    .container{max-width:1280px;padding:0 32px;}
  }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:rgba(4,18,28,.88);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-top{
    display:flex;
    align-items:center;
    gap:20px;
    height:64px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:36px;height:36px;
    display:grid;place-items:center;
    border-radius:11px;
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#04121C;
    font-weight:800;
    font-size:17px;
    box-shadow:0 0 0 1px rgba(63,240,208,.4), 0 8px 20px -8px rgba(22,184,212,.7);
  }
  .brand-word{display:flex;flex-direction:column;line-height:1.15;}
  .brand-word b{font-size:15px;font-weight:700;letter-spacing:.01em;}
  .brand-word span{font-size:11px;color:var(--txt-3);letter-spacing:.14em;}

  .header-search{
    flex:1;
    max-width:400px;
    display:flex;
    align-items:center;
    gap:10px;
    height:40px;
    padding:0 14px;
    border-radius:999px;
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
  }
  .header-search i{color:var(--txt-3);font-size:13px;}
  .header-search input{
    flex:1;min-width:0;background:transparent;border:0;outline:none;font-size:14px;
  }
  .header-search input::placeholder{color:var(--txt-3);}
  .header-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25);}

  .nav-links{margin-left:auto;display:flex;align-items:center;gap:22px;}
  .nav-text-link{
    font-size:14px;
    color:var(--txt-2);
    padding:6px 0;
    position:relative;
    transition:color .2s var(--ease);
  }
  .nav-text-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,var(--brand),var(--brand-2));
    transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
  }
  .nav-text-link:hover{color:var(--brand-2);}
  .nav-text-link:hover::after{transform:scaleX(1);}
  .nav-text-link.active{color:var(--brand-2);}
  .nav-text-link.active::after{transform:scaleX(1);}

  .menu-toggle{
    margin-left:auto;
    width:40px;height:40px;
    display:grid;place-items:center;
    border-radius:10px;
    border:1px solid var(--line);
    color:var(--txt-2);
    cursor:pointer;
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .menu-toggle:hover{border-color:var(--line-strong);color:var(--brand-2);}

  .mobile-panel{
    display:none;
    padding:8px 0 18px;
    border-top:1px solid var(--line);
  }
  .mobile-panel.open{display:block;}
  .mobile-panel a{
    display:block;
    padding:12px 4px;
    font-size:15px;
    color:var(--txt-2);
    border-bottom:1px solid rgba(120,230,240,.08);
  }
  .mobile-panel a.active{color:var(--brand-2);}
  .mobile-panel a:hover{color:var(--brand-2);}

  /* ---------- 频道 Tabs ---------- */
  .channel-bar{
    border-top:1px solid rgba(120,230,240,.08);
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 24px,#000 calc(100% - 24px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 24px,#000 calc(100% - 24px),transparent 100%);
  }
  .channel-scroll{
    display:flex;
    gap:10px;
    overflow-x:auto;
    padding:9px 0;
    scroll-snap-type:x proximity;
    scrollbar-width:none;
  }
  .channel-scroll::-webkit-scrollbar{display:none;}
  .channel-tab{
    flex:0 0 auto;
    scroll-snap-align:start;
    height:34px;
    display:inline-flex;
    align-items:center;
    padding:0 16px;
    border-radius:999px;
    font-size:13px;
    color:var(--txt-2);
    border:1px solid transparent;
    background:rgba(255,255,255,.03);
    position:relative;
    transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
  }
  .channel-tab:hover{color:var(--txt);border-color:var(--line);}
  .channel-tab.active{
    color:var(--brand-2);
    border-color:rgba(22,184,212,.55);
    background:rgba(22,184,212,.1);
  }
  .channel-tab.active::after{
    content:"";
    position:absolute;
    left:14px;right:14px;bottom:-6px;
    height:2px;
    border-radius:2px;
    background:linear-gradient(90deg,var(--brand),var(--brand-2));
    box-shadow:0 0 12px rgba(63,240,208,.7);
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:46px;
    padding:0 22px;
    border-radius:999px;
    font-size:14px;
    font-weight:600;
    white-space:nowrap;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease);
  }
  .btn-sm{height:36px;padding:0 16px;font-size:13px;}
  .btn-primary{
    background:linear-gradient(120deg,var(--brand),var(--brand-2));
    color:#04121C;
    box-shadow:0 0 0 1px rgba(63,240,208,.45), 0 10px 28px -8px rgba(22,184,212,.6);
  }
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(63,240,208,.5), 0 14px 32px -8px rgba(22,184,212,.7);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.45), 0 6px 16px -8px rgba(22,184,212,.55);}
  .btn-ghost{
    background:transparent;
    border-color:rgba(22,184,212,.55);
    color:var(--brand-2);
  }
  .btn-ghost:hover{background:rgba(22,184,212,.08);transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(0);}

  .text-link{
    color:var(--brand-2);
    font-size:14px;
    display:inline-flex;
    align-items:center;
    gap:6px;
    border-bottom:1px solid transparent;
    transition:border-color .2s var(--ease);
  }
  .text-link:hover{border-color:var(--brand-2);}
  .text-link i{transition:transform .2s var(--ease);}
  .text-link:hover i{transform:translateX(4px);}

  /* ---------- 页头 Hero ---------- */
  .page-hero{
    position:relative;
    overflow:hidden;
    padding:64px 0 56px;
    background-image:linear-gradient(180deg,rgba(4,18,28,.72),rgba(4,18,28,.94)), url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center;
    border-bottom:1px solid var(--line);
  }
  .page-hero::after{
    content:"";
    position:absolute;
    left:-10%;right:-10%;bottom:-120px;height:240px;
    border-radius:50%;
    border-top:1px solid rgba(63,240,208,.14);
    box-shadow:0 -20px 60px -30px rgba(22,184,212,.5);
    pointer-events:none;
  }
  .page-hero-grid{
    display:grid;
    grid-template-columns:1.35fr .65fr;
    gap:44px;
    align-items:center;
  }
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--txt-3);
    margin-bottom:16px;
  }
  .breadcrumb a:hover{color:var(--brand-2);}
  .breadcrumb i{font-size:10px;opacity:.7;}
  .page-hero h1{
    font-size:clamp(1.85rem,3.6vw,2.7rem);
    font-weight:800;
    line-height:1.2;
    letter-spacing:-.01em;
    max-width:20ch;
  }
  .page-hero .lead{
    margin-top:14px;
    color:var(--txt-2);
    font-size:16px;
    max-width:44ch;
  }
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
  .tag{
    display:inline-flex;align-items:center;gap:6px;
    height:28px;padding:0 12px;
    border-radius:999px;
    font-size:12px;
    letter-spacing:.04em;
    color:var(--brand-2);
    background:rgba(22,184,212,.12);
    border:1px solid rgba(120,230,240,.18);
  }
  .tag-accent{
    color:var(--accent);
    background:rgba(255,178,91,.12);
    border-color:rgba(255,178,91,.28);
  }
  .hero-search{
    margin-top:26px;
    max-width:520px;
    display:flex;
    align-items:center;
    gap:12px;
    height:52px;
    padding:0 8px 0 18px;
    border-radius:14px;
    background:rgba(255,255,255,.05);
    border:1px solid rgba(120,230,240,.16);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .hero-search i{color:var(--txt-3);font-size:14px;}
  .hero-search input{flex:1;min-width:0;background:transparent;border:0;outline:none;font-size:14px;}
  .hero-search input::placeholder{color:var(--txt-3);}
  .hero-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25);}
  .hero-search .btn{height:38px;}

  .hero-figure{
    position:relative;
    border-radius:var(--r-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow-card);
    aspect-ratio:4/3;
  }
  .hero-figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
  .hero-figure:hover img{transform:scale(1.03);}
  .hero-figure::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(4,18,28,.15),rgba(4,18,28,.82));
  }
  .hero-figure-cap{
    position:absolute;
    left:18px;right:18px;bottom:16px;
    z-index:2;
    font-size:13px;
    color:var(--txt-2);
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:72px 0;}
  @media (min-width:1024px){ .section{padding:96px 0;} }
  .section-head{max-width:56ch;margin-bottom:28px;}
  .section-head h2{
    font-size:clamp(1.4rem,2.4vw,2rem);
    font-weight:700;
    line-height:1.3;
  }
  .section-head p{margin-top:10px;color:var(--txt-2);font-size:15px;}

  /* ---------- FAQ 布局 ---------- */
  .faq-layout{
    display:grid;
    grid-template-columns:220px 1fr;
    gap:40px;
    align-items:start;
  }
  .cat-list{
    position:sticky;
    top:132px;
    display:flex;
    flex-direction:column;
    gap:8px;
  }
  .cat-title{
    font-size:12px;
    letter-spacing:.16em;
    color:var(--txt-3);
    margin-bottom:4px;
  }
  .cat-pill{
    display:flex;
    align-items:center;
    gap:10px;
    height:42px;
    padding:0 14px;
    border-radius:var(--r-sm);
    font-size:14px;
    color:var(--txt-2);
    border:1px solid transparent;
    background:rgba(255,255,255,.03);
    transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  }
  .cat-pill i{font-size:12px;color:var(--txt-3);transition:color .2s var(--ease);}
  .cat-pill:hover{color:var(--txt);border-color:var(--line);}
  .cat-pill.active{
    color:var(--brand-2);
    background:rgba(22,184,212,.1);
    border-color:rgba(22,184,212,.45);
  }
  .cat-pill.active i{color:var(--brand-2);}

  .faq-group{margin-bottom:34px;}
  .faq-group:last-child{margin-bottom:0;}
  .group-title{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:13px;
    letter-spacing:.14em;
    color:var(--txt-3);
    margin-bottom:14px;
  }
  .group-title::after{
    content:"";
    flex:1;
    height:1px;
    background:linear-gradient(90deg,var(--line),transparent);
  }

  .faq-item{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    background:var(--bg-panel);
    margin-bottom:12px;
    transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
  }
  .faq-item:hover{border-color:var(--line-strong);}
  .faq-item::before{
    content:"";
    position:absolute;
    left:0;top:0;
    width:3px;height:0;
    background:linear-gradient(180deg,var(--brand),var(--brand-2));
    transition:height .24s var(--ease);
  }
  .faq-item.open{
    border-color:rgba(22,184,212,.42);
    box-shadow:var(--shadow-hover);
  }
  .faq-item.open::before{height:100%;}
  .faq-q{
    width:100%;
    min-height:56px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:12px 20px;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--txt);
    cursor:pointer;
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--brand-2);}
  .faq-q .faq-icon{
    flex:0 0 auto;
    width:26px;height:26px;
    display:grid;place-items:center;
    border-radius:8px;
    border:1px solid rgba(120,230,240,.24);
    color:var(--brand-2);
    font-size:12px;
    transition:transform .24s var(--ease),background .2s var(--ease);
  }
  .faq-item.open .faq-q .faq-icon{
    transform:rotate(45deg);
    background:rgba(22,184,212,.14);
  }
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s var(--ease);
  }
  .faq-a-inner{
    padding:0 20px 20px;
    color:var(--txt-2);
    font-size:15px;
    line-height:1.8;
    max-width:68ch;
  }

  /* ---------- 底部 CTA ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-lg);
    border:1px solid var(--line);
    background:linear-gradient(120deg,rgba(22,184,212,.14),rgba(11,42,60,.9) 55%,rgba(63,240,208,.1));
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    padding:36px 32px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    flex-wrap:wrap;
    box-shadow:var(--shadow-card);
  }
  .cta-band::before{
    content:"";
    position:absolute;left:0;right:0;top:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(63,240,208,.6),transparent);
  }
  .cta-band h2{font-size:clamp(1.25rem,2.2vw,1.6rem);font-weight:700;}
  .cta-band p{margin-top:8px;color:var(--txt-2);font-size:14px;max-width:44ch;}
  .cta-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:16px;
    background:var(--bg-deep);
    border-top:1px solid var(--line);
    padding:64px 0 24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:36px;
  }
  .footer-title{
    font-size:13px;
    letter-spacing:.14em;
    color:var(--txt-3);
    margin-bottom:14px;
  }
  .footer-link{
    display:block;
    line-height:36px;
    font-size:14px;
    color:var(--txt-2);
    transition:color .2s var(--ease),transform .2s var(--ease);
  }
  a.footer-link:hover{color:var(--brand-2);transform:translateX(2px);}
  .footer-bottom{
    margin-top:44px;
    padding-top:18px;
    border-top:1px solid rgba(120,230,240,.1);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--txt-3);
  }
  .to-top{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--txt-2);
    transition:color .2s var(--ease);
  }
  .to-top:hover{color:var(--brand-2);}

  .reveal{opacity:0;transform:translateY(12px);}
  .reveal.in{opacity:1;transform:none;transition:opacity .48s var(--ease),transform .48s var(--ease);}

  @media (max-width:1023px){
    body::before{display:none;}
    .page-hero-grid{grid-template-columns:1fr;gap:30px;}
    .faq-layout{grid-template-columns:1fr;gap:24px;}
    .cat-list{
      position:static;
      flex-direction:row;
      overflow-x:auto;
      padding-bottom:6px;
      scrollbar-width:none;
    }
    .cat-list::-webkit-scrollbar{display:none;}
    .cat-title{display:none;}
    .cat-pill{flex:0 0 auto;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  }
  @media (max-width:767px){
    .section{padding:56px 0;}
    .page-hero{padding:48px 0 44px;}
    .faq-q{font-size:15px;}
    .cta-band{padding:28px 20px;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (max-width:519px){
    .hero-search{height:auto;flex-wrap:wrap;padding:12px 14px;}
    .hero-search input{width:100%;flex:1 1 100%;}
    .hero-search .btn{width:100%;}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;}
  }

/* roulang page: category5 */
:root{
  --bg-deep:#04121C;
  --bg-base:#071E2C;
  --bg-panel:#0B2A3C;
  --brand:#16B8D4;
  --brand-2:#3FF0D0;
  --accent:#FFB25B;
  --txt:#E6F3F8;
  --txt-2:#A7C2CE;
  --txt-3:#6C8896;
  --line:rgba(120,230,240,.14);
  --line-strong:rgba(120,230,240,.26);
  --glass:rgba(255,255,255,.05);
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:20px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-glow:0 18px 40px -18px rgba(22,184,212,.45);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--txt);
  font-family:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(22,184,212,.35) 1px, transparent 1px);
  background-size:44px 44px;
  opacity:.05;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
input{font-family:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:1024px){
  .container{max-width:1280px;padding-left:32px;padding-right:32px;}
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(4,18,28,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:64px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04121C;font-weight:800;font-size:16px;
  box-shadow:0 6px 18px -8px rgba(63,240,208,.8);
}
.brand-word{display:flex;flex-direction:column;line-height:1.15;}
.brand-word b{font-size:16px;font-weight:700;letter-spacing:.02em;}
.brand-word span{font-size:11px;color:var(--txt-3);letter-spacing:.16em;}
.search-wrap{
  display:none;
  align-items:center;
  gap:10px;
  height:40px;
  padding:0 14px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--line);
  transition:border-color .2s ease, box-shadow .2s ease;
  flex:1;
  max-width:400px;
}
.search-wrap i{color:var(--txt-3);font-size:14px;}
.search-wrap input{
  flex:1;background:transparent;border:none;outline:none;
  color:var(--txt);font-size:14px;
}
.search-wrap input::placeholder{color:var(--txt-3);}
.search-wrap:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,184,212,.25);}
@media (min-width:900px){.search-wrap{display:flex;}}
.nav-links{margin-left:auto;align-items:center;gap:8px;}
.nav-text-link{
  font-size:14px;color:var(--txt-2);padding:8px 4px;position:relative;
  transition:color .2s ease;
}
.nav-text-link::after{
  content:"";position:absolute;left:4px;right:4px;bottom:2px;height:1px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-text-link:hover{color:var(--brand-2);}
.nav-text-link:hover::after{transform:scaleX(1);}
.nav-burger{
  margin-left:auto;
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--txt);
  cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.nav-burger:hover{border-color:var(--brand);color:var(--brand-2);}
@media (min-width:1024px){.nav-burger{display:none;}}

.tabs-bar{border-top:1px solid var(--line);}
.tabs-scroll{
  display:flex;align-items:center;gap:8px;
  height:48px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  scroll-snap-type:x proximity;
}
.tabs-scroll::-webkit-scrollbar{display:none;}
.tab{
  position:relative;
  flex:0 0 auto;
  scroll-snap-align:start;
  padding:7px 16px;
  border-radius:999px;
  font-size:14px;
  color:var(--txt-2);
  border:1px solid transparent;
  white-space:nowrap;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.tab:hover{color:var(--txt);background:rgba(255,255,255,.05);}
.tab.active{
  color:var(--brand-2);
  border-color:rgba(22,184,212,.5);
  background:rgba(22,184,212,.10);
}
.tab.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 10px rgba(63,240,208,.75);
}
.mobile-menu{
  display:none;
  border-top:1px solid var(--line);
  padding:12px 0 18px;
}
.mobile-menu.open{display:block;}
.mobile-menu a{
  display:block;padding:12px 0;font-size:15px;color:var(--txt-2);
  border-bottom:1px solid var(--line);
}
.mobile-menu a:last-child{border-bottom:none;}
.mobile-menu a:hover{color:var(--brand-2);}
@media (min-width:1024px){.mobile-menu{display:none !important;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04121C;
  box-shadow:0 0 0 1px rgba(63,240,208,.45),0 10px 28px -8px rgba(22,184,212,.6);
}
.btn-primary:hover{
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(63,240,208,.55),0 14px 32px -8px rgba(22,184,212,.75);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(63,240,208,.5),0 6px 16px -8px rgba(22,184,212,.6);}
.btn-ghost{
  background:transparent;
  border-color:rgba(22,184,212,.55);
  color:var(--brand-2);
}
.btn-ghost:hover{background:rgba(22,184,212,.10);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;position:relative;z-index:1;}
@media (min-width:1024px){.section{padding:96px 0;}}
.section-head{margin-bottom:32px;}
.section-title{font-size:clamp(1.35rem,2.6vw,2.1rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.section-sub{color:var(--txt-2);font-size:15px;margin-top:10px;max-width:64ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--brand-2);
  padding:6px 14px;border-radius:999px;
  background:rgba(22,184,212,.10);
  border:1px solid rgba(22,184,212,.28);
}
.grad{
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  padding:72px 0 56px;
  background-image:linear-gradient(180deg,rgba(4,18,28,.62),rgba(4,18,28,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;left:-10%;right:-10%;bottom:-120px;height:240px;
  background:radial-gradient(ellipse at center,rgba(22,184,212,.22),transparent 68%);
  pointer-events:none;
}
@media (min-width:1024px){.page-hero{padding:104px 0 84px;}}
.page-hero-inner{position:relative;z-index:1;max-width:820px;}
.page-title{
  font-size:clamp(2rem,4.4vw,3.2rem);
  font-weight:800;line-height:1.18;letter-spacing:-.01em;
  margin-top:20px;
}
.page-lead{
  margin-top:16px;
  font-size:16px;color:var(--txt-2);max-width:52ch;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;
}
.meta-chip{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--txt-2);
  padding:8px 14px;border-radius:999px;
  background:var(--glass);
  border:1px solid var(--line);
}
.meta-chip i{color:var(--brand-2);font-size:12px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

/* ---------- 标签分组 ---------- */
.pill-groups{display:grid;gap:24px;}
@media (min-width:900px){.pill-groups{grid-template-columns:repeat(3,1fr);}}
.pill-group{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:20px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.pill-group:hover{border-color:var(--line-strong);box-shadow:var(--shadow-card);}
.pill-group-title{
  font-size:13px;letter-spacing:.14em;color:var(--txt-3);
  margin-bottom:14px;
}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--txt-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,background .2s ease,transform .2s ease;
}
.pill:hover{
  color:var(--brand-2);border-color:rgba(22,184,212,.55);
  background:rgba(22,184,212,.10);transform:translateY(-2px);
}

/* ---------- 列表 + 侧栏 ---------- */
.list-layout{display:grid;gap:32px;}
@media (min-width:1024px){
  .list-layout{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;}
}
.dense-list{
  border-top:1px solid var(--line);
}
.list-row{
  display:flex;align-items:center;gap:16px;
  min-height:56px;
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.list-row:hover{background:rgba(255,255,255,.04);}
.row-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;color:var(--txt-3);flex:0 0 34px;
}
.row-title{
  flex:1;min-width:0;
  font-size:15px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  transition:color .2s ease;
}
.list-row:hover .row-title{color:var(--brand-2);}
.badge{
  flex:0 0 auto;
  font-size:12px;letter-spacing:.06em;
  padding:4px 10px;border-radius:6px;
  color:var(--brand-2);
  background:rgba(22,184,212,.12);
  border:1px solid rgba(22,184,212,.26);
  white-space:nowrap;
}
.badge-accent{
  color:#04121C;
  background:linear-gradient(135deg,var(--accent),#ffd39d);
  border-color:transparent;
}
.row-date{
  flex:0 0 auto;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12.5px;color:var(--txt-3);
}
.row-arrow{
  flex:0 0 auto;font-size:12px;color:var(--txt-3);
  transition:transform .2s ease,color .2s ease;
}
.list-row:hover .row-arrow{transform:translateX(4px);color:var(--brand-2);}

@media (max-width:760px){
  .row-date{display:none;}
  .badge{display:none;}
}
.list-side{display:grid;gap:20px;align-content:start;}
@media (min-width:1024px){
  .list-side{position:sticky;top:96px;}
}
.side-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:22px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.side-card-head{
  font-size:14px;font-weight:700;letter-spacing:.04em;
  padding-bottom:14px;margin-bottom:6px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;
}
.side-card-head i{color:var(--brand-2);font-size:13px;}
.side-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;
  font-size:14px;color:var(--txt-2);
  border-bottom:1px dashed rgba(120,230,240,.12);
  transition:color .2s ease,padding-left .2s ease;
}
.side-link:last-child{border-bottom:none;}
.side-link:hover{color:var(--brand-2);padding-left:4px;}
.side-link i{font-size:11px;color:var(--txt-3);}
.side-card-img{padding:0;overflow:hidden;}
.side-card-img img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform .3s ease;
}
.side-card-img:hover img{transform:scale(1.03);}
.side-note{
  padding:14px 18px;font-size:13px;color:var(--txt-3);
  border-top:1px solid var(--line);
}

/* ---------- 特性条 ---------- */
.feature-strip{display:grid;gap:20px;}
@media (min-width:820px){.feature-strip{grid-template-columns:repeat(3,1fr);}}
.feature-item{
  text-align:center;
  padding:30px 22px;
  border-radius:var(--radius-m);
  background:var(--glass);
  border:1px solid var(--line);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.feature-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-glow);}
.feature-icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:16px;
  display:grid;place-items:center;
  background:rgba(22,184,212,.12);
  border:1px solid rgba(22,184,212,.3);
  color:var(--brand-2);font-size:20px;
}
.feature-item h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.feature-item p{font-size:14px;color:var(--txt-2);line-height:1.8;}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:32px;
  border-radius:var(--radius-l);
  background:linear-gradient(120deg,rgba(22,184,212,.16),rgba(63,240,208,.06));
  border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(63,240,208,.7),transparent);
}
.cta-title{font-size:clamp(1.15rem,2vw,1.6rem);font-weight:700;}
.cta-text{color:var(--txt-2);font-size:14px;margin-top:8px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:40px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;gap:36px;}
@media (min-width:760px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;}}
.footer-title{
  font-size:13px;letter-spacing:.16em;color:var(--txt-3);
  margin-bottom:14px;
}
.footer-link{
  display:block;
  font-size:14px;color:var(--txt-2);
  line-height:36px;
  transition:color .2s ease,transform .2s ease;
}
a.footer-link:hover{color:var(--brand-2);transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;
  padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:var(--txt-3);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--txt-2);transition:color .2s ease;
}
.to-top:hover{color:var(--brand-2);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-visible{
  opacity:1;transform:none;
  transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
@media (max-width:480px){
  body::before{display:none;}
  .btn{height:44px;padding:0 20px;font-size:14px;}
  .section{padding:48px 0;}
}