/* roulang page: index */
:root{
  --ink-900:#160F26;
  --ink-800:#1E1533;
  --brand-600:#6C3BF4;
  --brand-500:#7F55FF;
  --brand-100:#EDE7FF;
  --accent:#21E6B4;
  --coral:#FF7A5A;
  --bg:#F6F4FB;
  --card:#FFFFFF;
  --line:#E7E2F3;
  --text:#191326;
  --muted:#635C79;
  --dark-text:#F3EFFF;
  --dark-muted:#B9AED6;
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --r-btn:14px;
  --sh-sm:0 2px 8px rgba(30,21,51,.06);
  --sh-md:0 12px 32px rgba(30,21,51,.10);
  --grad:linear-gradient(120deg,#6C3BF4 0%,#B23BFF 55%,#FF7A5A 100%);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
input,textarea,select{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.dark-zone :focus-visible{outline-color:var(--accent)}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:1024px){.container{padding-left:24px;padding-right:24px}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(22,15,38,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent 0%,rgba(127,85,255,.9) 35%,rgba(33,230,180,.9) 65%,transparent 100%);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
@media(min-width:1024px){.nav-inner{height:72px}}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  position:relative;width:34px;height:34px;border-radius:10px;
  background:var(--grad);
  border:1px solid rgba(33,230,180,.55);
  box-shadow:0 0 18px rgba(108,59,244,.55);
  flex-shrink:0;
}
.logo-mark::after{
  content:"";position:absolute;inset:9px;border-radius:4px;
  border:2px solid rgba(243,239,255,.9);
}
.logo-text{color:#F3EFFF;font-size:18px;font-weight:700;letter-spacing:.5px;white-space:nowrap}
.nav-link{
  position:relative;display:inline-block;color:var(--dark-muted);
  font-size:15px;font-weight:500;padding:8px 2px;
  transition:color .18s ease;
}
.nav-link:hover{color:#F3EFFF}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 12px rgba(33,230,180,.85);
  transform:scaleX(0);transform-origin:center;transition:transform .22s ease;
}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#F3EFFF;font-weight:600}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1.4;padding:12px 22px;
  border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,filter .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(108,59,244,.30)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:#F7F4FF}
.btn-glass{background:rgba(243,239,255,.06);color:#F3EFFF;border-color:rgba(185,174,214,.38)}
.btn-glass:hover{background:rgba(33,230,180,.12);border-color:rgba(33,230,180,.6);box-shadow:0 0 0 1px rgba(33,230,180,.35),0 0 24px rgba(108,59,244,.30)}
.btn-pill{border-radius:999px}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:12px}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.4px;
  padding:6px 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-600);
}
.badge-line{background:rgba(33,230,180,.08);border:1px solid rgba(33,230,180,.5);color:var(--accent)}
.badge-coral{background:rgba(255,122,90,.12);color:#D9482A}

/* 卡片 */
.card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh-sm);overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card::before{
  content:"";position:absolute;top:0;left:0;width:40%;height:3px;background:var(--grad);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.card-static:hover{transform:none}

/* 标题修饰 */
.sec-underline{display:block;width:56px;height:4px;border-radius:4px;background:var(--grad);margin-top:14px}
.dark-zone .sec-underline{box-shadow:0 0 14px rgba(33,230,180,.45)}

/* 深色数据卡 */
.stat-chip{
  border-radius:var(--r-sm);padding:10px 16px;
  background:rgba(243,239,255,.05);
  border:1px solid rgba(185,174,214,.22);
}
.stat-num{font-size:26px;font-weight:800;color:var(--accent);line-height:1.2;letter-spacing:-.5px}
.stat-label{font-size:12px;color:var(--dark-muted);letter-spacing:.4px}

/* 轮播 */
.carousel{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:6px 2px 18px}
.carousel::-webkit-scrollbar{height:0}
.carousel{scrollbar-width:none;-ms-overflow-style:none}
.carousel-item{scroll-snap-align:start;flex:0 0 78vw;max-width:380px}
@media(min-width:768px){.carousel-item{flex:0 0 340px}}
.carousel-btn{
  width:42px;height:42px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);color:var(--brand-600);cursor:pointer;
  box-shadow:var(--sh-sm);transition:transform .18s ease,border-color .18s ease,background .18s ease;
}
.carousel-btn:hover{border-color:var(--brand-500);background:#F7F4FF;transform:translateY(-1px)}
.dot-btn{width:8px;height:8px;border-radius:999px;background:#D8D1EA;border:0;padding:0;cursor:pointer;transition:all .22s ease}
.dot-btn.is-active{width:20px;background:var(--grad)}

/* 评价 */
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 22px 20px;box-shadow:var(--sh-sm);
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.avatar{
  width:42px;height:42px;border-radius:999px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;color:#fff;background:var(--grad);
}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:700;color:var(--text);line-height:1.6;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--brand-600)}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-600);
  font-size:18px;font-weight:600;line-height:1;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-q.is-open .faq-icon{transform:rotate(45deg);background:var(--accent);color:#0E3B2E}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 4px 20px;font-size:14px;line-height:1.9;color:var(--muted)}

/* 资讯列表 */
.news-card{
  position:relative;display:flex;flex-direction:column;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-sm);overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.news-card::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,#6C3BF4,#21E6B4);opacity:.35;transition:opacity .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#D9D0F2}
.news-card:hover::before{opacity:1}
.news-title{font-size:17px;font-weight:700;line-height:1.6;color:var(--text)}
.news-desc{
  font-size:14px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#8C86A0;margin-top:auto;padding-top:6px}

/* 表单/输入 */
.field{
  width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:12px 16px;font-size:15px;color:var(--text);line-height:1.6;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field::placeholder{color:#A9A2BC}
.field:focus{outline:0;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(108,59,244,.10)}

/* 页脚 */
.site-footer{
  background:var(--ink-900);color:var(--dark-muted);position:relative;
  border-top:1px solid transparent;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(127,85,255,.85),rgba(33,230,180,.85),transparent);
}
.footer-link{color:var(--dark-muted);font-size:14px;transition:color .18s ease}
.footer-link:hover{color:#F3EFFF}

/* 移动端抽屉 */
.mobile-panel{
  position:fixed;inset:64px 0 0 0;z-index:65;
  background:rgba(22,15,38,.985);
  backdrop-filter:blur(16px);
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .22s ease,transform .22s ease;
  overflow-y:auto;
}
.mobile-panel.is-open{opacity:1;pointer-events:auto;transform:translateY(0)}
.hamburger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border-radius:10px;border:1px solid rgba(185,174,214,.3);background:rgba(243,239,255,.05);cursor:pointer;align-items:center}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:#F3EFFF;transition:transform .22s ease,opacity .22s ease}
.hamburger.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-active span:nth-child(2){opacity:0}
.hamburger.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 表格 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:#fff}
table.spec{width:100%;min-width:520px;border-collapse:collapse;font-size:14px}
table.spec thead th{
  background:#F1ECFB;color:#3A2E5C;font-weight:700;text-align:left;
  padding:14px 18px;white-space:nowrap;
}
table.spec tbody td{padding:14px 18px;border-top:1px solid var(--line);color:var(--muted)}
table.spec tbody td:first-child{color:var(--text);font-weight:600;white-space:nowrap}

/* 二维码伪 graphic */
.qr-box{
  width:108px;height:108px;background:#fff;border-radius:var(--r-sm);
  padding:8px;box-shadow:0 8px 22px rgba(30,21,51,.14);
}
.qr-grid{
  width:100%;height:100%;border-radius:6px;
  background-image:
    linear-gradient(90deg,#160F26 25%,transparent 25%,transparent 50%,#160F26 50%,#160F26 75%,transparent 75%),
    linear-gradient(0deg,#160F26 20%,transparent 20%,transparent 45%,#160F26 45%,#160F26 65%,transparent 65%);
  background-size:14px 14px,14px 14px;
  background-blend-mode:multiply;
  opacity:.85;
}

/* 通用图片容器 */
.img-frame{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#EFEAF9}
.img-frame img{width:100%;height:100%;object-fit:cover}

/* 章节过渡渐变 */
.soft-grad{background:linear-gradient(180deg,#F9F7FE 0%,#F2EDFB 100%)}
.dark-zone{color:var(--dark-text)}
.dark-zone .sec-title{color:var(--dark-text)}

/* 打印/动画 */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
    --ink-900:#160F26;
    --ink-800:#1E1533;
    --brand-600:#6C3BF4;
    --brand-500:#7F55FF;
    --brand-100:#EDE7FF;
    --accent:#21E6B4;
    --coral:#FF7A5A;
    --bg:#F6F4FB;
    --surface:#FFFFFF;
    --line:#E7E2F3;
    --text:#191326;
    --muted:#635C79;
    --grad:linear-gradient(120deg,#6C3BF4 0%,#B23BFF 55%,#FF7A5A 100%);
    --shadow-sm:0 2px 8px rgba(30,21,51,.06);
    --shadow-md:0 12px 32px rgba(30,21,51,.10);
    --radius-lg:24px;
    --radius-md:18px;
    --radius-sm:12px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul,ol{list-style:none;margin:0;padding:0;}
  button{font-family:inherit;cursor:pointer;}
  h1,h2,h3,h4,p{margin:0;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
  .num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(22,15,38,.92);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF 35%,#21E6B4 65%,transparent);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
  @media (min-width:1024px){.header-inner{height:72px;}}
  .logo-mark{
    width:28px;height:28px;border-radius:9px;display:inline-block;flex:none;
    background:var(--grad);
    box-shadow:inset 0 0 0 1.5px rgba(33,230,180,.65),0 0 18px rgba(108,59,244,.55);
  }
  .logo-text{color:#F3EFFF;font-weight:700;font-size:18px;letter-spacing:.5px;}
  .nav-link{
    position:relative;display:inline-block;padding:6px 2px;
    font-size:15px;font-weight:500;color:#B9AED6;
    transition:color .18s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:-8px;transform:translateX(-50%);
    width:0;height:2px;border-radius:2px;background:var(--accent);
    box-shadow:0 0 12px var(--accent);transition:width .22s ease;
  }
  .nav-link:hover{color:#F3EFFF;}
  .nav-link:hover::after{width:100%;}
  .nav-link.is-active{color:#F3EFFF;font-weight:700;}
  .nav-link.is-active::after{width:100%;}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border:0;border-radius:14px;font-weight:700;font-size:15px;
    padding:12px 22px;line-height:1.2;
    transition:transform .18s ease,filter .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease;
  }
  .btn-primary{
    background:var(--grad);color:#fff;
    box-shadow:0 8px 24px rgba(108,59,244,.28);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0) scale(.99);}
  .btn-ghost{
    background:#fff;color:var(--brand-600);
    border:1px solid var(--line);
    box-shadow:var(--shadow-sm);
  }
  .btn-ghost:hover{border-color:var(--brand-500);background:#F7F4FF;}
  .btn-glass{
    background:rgba(255,255,255,.06);color:#F3EFFF;
    border:1px solid rgba(33,230,180,.35);
  }
  .btn-glass:hover{background:rgba(33,230,180,.12);border-color:rgba(33,230,180,.7);}
  .btn-pill{border-radius:999px;}
  .btn-sm{padding:9px 16px;font-size:14px;border-radius:12px;}
  .btn-block{width:100%;}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.4px;
    background:var(--brand-100);color:var(--brand-600);
    white-space:nowrap;
  }
  .badge-line{
    background:transparent;color:#B9AED6;
    border:1px solid rgba(33,230,180,.35);
  }
  .badge-accent{
    background:rgba(33,230,180,.14);color:#0F8C6C;
    border:1px solid rgba(33,230,180,.35);
  }
  .badge-dark{
    background:var(--ink-800);color:#F3EFFF;
    border:1px solid rgba(33,230,180,.35);
  }
  .badge-dark .badge-num{color:var(--accent);font-weight:800;font-family:Inter,system-ui,sans-serif;}

  /* ---------- breadcrumb ---------- */
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding:12px 0;}
  .crumb .sep{color:#C6BEDD;}
  .crumb .now{color:var(--brand-600);font-weight:700;}

  /* ---------- hero ---------- */
  .hero{
    position:relative;overflow:hidden;
    background:
      radial-gradient(900px 420px at 88% -10%,rgba(178,59,255,.16),transparent 65%),
      radial-gradient(700px 360px at 4% 110%,rgba(33,230,180,.16),transparent 60%),
      linear-gradient(180deg,#FBFAFF 0%,#F6F4FB 100%);
    border-bottom:1px solid var(--line);
  }
  .hero-title{
    font-size:clamp(30px,4.2vw,52px);
    font-weight:800;line-height:1.18;letter-spacing:-.5px;
  }
  .hero-title .hl{
    background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-sub{font-size:16px;color:var(--muted);line-height:1.9;max-width:560px;}
  .hero-figure{
    position:relative;border-radius:20px;overflow:hidden;
    border:1px solid var(--line);background:#fff;
    box-shadow:var(--shadow-md);
  }
  .hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
  .float-card{
    position:absolute;background:#fff;border:1px solid var(--line);
    border-radius:12px;padding:10px 14px;box-shadow:var(--shadow-md);
    font-size:12px;font-weight:600;color:var(--muted);
  }
  .float-card b{display:block;font-size:20px;font-weight:800;color:var(--brand-600);font-family:Inter,system-ui,sans-serif;line-height:1.3;}

  /* ---------- sections ---------- */
  .section{padding:56px 0;}
  @media (min-width:1024px){.section{padding:96px 0;}}
  .section-head{max-width:720px;}
  .eyebrow{
    display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.2px;
    color:var(--brand-600);text-transform:uppercase;margin-bottom:10px;
  }
  .h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.3px;}
  .h2-underline{position:relative;display:inline-block;padding-bottom:10px;}
  .h2-underline::after{
    content:"";position:absolute;left:0;bottom:0;width:64px;height:4px;border-radius:4px;background:var(--grad);
  }
  .lead{color:var(--muted);font-size:16px;line-height:1.9;}

  /* ---------- cards ---------- */
  .card{
    position:relative;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--radius-lg);
    overflow:hidden;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  .card::before{
    content:"";position:absolute;top:0;left:0;height:3px;width:40%;
    background:var(--grad);border-radius:0 3px 3px 0;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#DCD4F0;}
  .card-body{padding:24px;}
  @media (min-width:768px){.card-body{padding:30px;}}
  .card-title{font-size:20px;font-weight:700;line-height:1.4;}
  .card-text{font-size:15px;color:var(--muted);line-height:1.9;}
  .card-img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px;border:1px solid var(--line);}

  .ability{padding:0;}
  .ability-inner{display:flex;flex-direction:column;gap:22px;padding:24px;}
  @media (min-width:768px){.ability-inner{padding:30px;}}
  @media (min-width:1024px){
    .ability-flip .ability-inner{flex-direction:row-reverse;}
    .ability-inner{flex-direction:row;align-items:center;gap:30px;}
    .ability-media{flex:0 0 46%;}
    .ability-copy{flex:1 1 auto;}
  }
  .ability-media{width:100%;}

  /* ---------- plan compare ---------- */
  .plan-card{
    position:relative;background:#fff;border:1px solid var(--line);
    border-radius:var(--radius-md);padding:26px;height:100%;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  .plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
  .plan-card.is-featured{
    border-color:rgba(108,59,244,.4);
    box-shadow:0 0 0 1px rgba(108,59,244,.18),0 14px 34px rgba(108,59,244,.14);
  }
  .plan-card.is-featured::after{
    content:"推荐";position:absolute;top:16px;right:16px;
    font-size:11px;font-weight:700;letter-spacing:.5px;color:#fff;
    background:var(--grad);padding:3px 10px;border-radius:999px;
  }
  .plan-price{font-size:28px;font-weight:800;letter-spacing:-.5px;font-family:Inter,system-ui,sans-serif;}
  .plan-list li{
    display:flex;gap:10px;align-items:flex-start;
    font-size:14px;color:var(--muted);line-height:1.8;padding:7px 0;
  }
  .plan-list li::before{
    content:"";flex:none;width:6px;height:6px;margin-top:10px;border-radius:2px;background:var(--brand-500);
  }
  .compare-wrap{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
    overflow:hidden;
  }
  .compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
  .compare-row{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
    min-width:640px;align-items:center;
  }
  .compare-row > div{padding:14px 18px;font-size:14px;border-bottom:1px solid var(--line);}
  .compare-row.head > div{
    background:#F3EFFF;font-weight:700;color:var(--ink-800);font-size:13px;letter-spacing:.3px;
  }
  .compare-row:last-child > div{border-bottom:0;}
  .compare-row .feat{font-weight:600;color:var(--text);}
  .compare-row .val{color:var(--muted);}
  .compare-row .val.ok{color:#0F8C6C;font-weight:600;}

  /* ---------- faq ---------- */
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:last-child{border-bottom:0;}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 24px;background:transparent;border:0;text-align:left;
    font-size:16px;font-weight:700;color:var(--text);line-height:1.6;
  }
  .faq-q:hover{color:var(--brand-600);}
  .faq-icon{
    flex:none;width:26px;height:26px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);color:var(--brand-600);
    font-size:16px;font-weight:700;line-height:1;
    transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  }
  .faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(33,230,180,.16);border-color:rgba(33,230,180,.6);color:#0F8C6C;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
  .faq-a-inner{padding:0 24px 20px;font-size:14px;color:var(--muted);line-height:1.9;}

  /* ---------- cta ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:28px;
    background:
      radial-gradient(600px 260px at 12% 0%,rgba(33,230,180,.22),transparent 60%),
      radial-gradient(700px 320px at 90% 120%,rgba(255,122,90,.28),transparent 60%),
      linear-gradient(120deg,#2A1750 0%,#3A1E6B 55%,#4A1D5E 100%);
    color:#F3EFFF;
    padding:40px 26px;
  }
  @media (min-width:1024px){.cta-band{padding:56px 48px;}}
  .cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;}

  /* ---------- footer ---------- */
  .site-footer{
    position:relative;background:var(--ink-900);color:#B9AED6;
    margin-top:56px;
  }
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF 35%,#21E6B4 65%,transparent);
  }
  .footer-link{color:#B9AED6;font-size:14px;transition:color .18s ease;}
  .footer-link:hover{color:#F3EFFF;}
  .site-footer .num{color:#F3EFFF;font-weight:600;}

  /* ---------- mobile drawer ---------- */
  .drawer{
    position:fixed;inset:0;z-index:80;display:none;
    background:rgba(22,15,38,.98);
    backdrop-filter:blur(8px);
    padding:20px 24px 32px;
    flex-direction:column;
  }
  .drawer.open{display:flex;}
  .drawer-link{
    display:block;padding:16px 4px;font-size:17px;font-weight:600;color:#D9D0F0;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .drawer-link.is-active{color:#F3EFFF;}
  .drawer-link.is-active::before{content:"/";color:var(--accent);margin-right:8px;font-weight:800;}
  .burger{width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;}
  .burger span{display:block;width:18px;height:2px;border-radius:2px;background:#F3EFFF;transition:transform .2s ease,opacity .2s ease;}
  .burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .burger.is-open span:nth-child(2){opacity:0;}
  .burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .divider{height:1px;background:linear-gradient(90deg,transparent,#7F55FF 35%,#21E6B4 65%,transparent);opacity:.35;}
  .soft-panel{
    background:linear-gradient(180deg,#FBFAFF 0%,#F2EEFB 100%);
    border:1px solid var(--line);border-radius:var(--radius-lg);
  }

/* roulang page: article */
:root{
    --ink-900:#160F26;
    --ink-800:#1E1533;
    --brand-600:#6C3BF4;
    --brand-500:#7F55FF;
    --brand-100:#EDE7FF;
    --accent:#21E6B4;
    --coral:#FF7A5A;
    --bg:#F6F4FB;
    --card:#FFFFFF;
    --line:#E7E2F3;
    --text:#191326;
    --muted:#635C79;
    --light-text:#F3EFFF;
    --light-muted:#B9AED6;
    --radius-lg:24px;
    --radius-md:18px;
    --radius-sm:12px;
    --shadow-sm:0 2px 8px rgba(30,21,51,.06);
    --shadow-md:0 12px 32px rgba(30,21,51,.10);
    --glow:0 0 0 1px rgba(33,230,180,.35), 0 0 24px rgba(108,59,244,.30);
    --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    font-family:var(--font-cn);
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media(min-width:1024px){.container{padding-left:24px;padding-right:24px}}

  /* ============ 头部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(22,15,38,.92);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(127,85,255,.85),rgba(33,230,180,.85),transparent);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
  @media(min-width:1024px){.header-inner{height:72px}}
  .logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .logo-mark{
    position:relative;width:30px;height:30px;border-radius:9px;
    background:linear-gradient(120deg,#6C3BF4,#B23BFF 58%,#FF7A5A);
    box-shadow:0 0 0 1px rgba(33,230,180,.55),0 0 18px rgba(108,59,244,.55);
  }
  .logo-mark::after{content:"";position:absolute;inset:9px;border-radius:3px;background:rgba(255,255,255,.9)}
  .logo-text{color:var(--light-text);font-weight:700;font-size:17px;letter-spacing:.6px}
  .nav-link{position:relative;font-size:14.5px;font-weight:500;color:var(--light-muted);padding:6px 0;transition:color .18s ease}
  .nav-link:hover,.nav-link:focus-visible{color:#F3EFFF}
  .nav-link:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:4px}
  .nav-link.is-active{color:#F3EFFF}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;
    background:var(--accent);box-shadow:0 0 12px var(--accent);
  }
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:14px;font-weight:600;font-size:14px;line-height:1;
    padding:12px 22px;border:1px solid transparent;cursor:pointer;
    transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease,filter .18s ease,color .18s ease;
  }
  .btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  .btn-primary{
    background:linear-gradient(120deg,#6C3BF4,#B23BFF 58%,#FF7A5A);
    color:#fff;border-radius:999px;
    box-shadow:0 8px 22px rgba(108,59,244,.32);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0) scale(.99)}
  .btn-outline{background:#fff;color:var(--brand-600);border:1px solid var(--line)}
  .btn-outline:hover{border-color:var(--brand-500);background:#F7F4FF}
  .btn-glass{background:rgba(255,255,255,.08);color:var(--light-text);border:1px solid rgba(255,255,255,.22);border-radius:999px}
  .btn-glass:hover{background:rgba(255,255,255,.16);border-color:rgba(33,230,180,.6)}
  .btn-sm{padding:9px 17px;font-size:13px}
  .menu-toggle{
    display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.18);cursor:pointer;transition:background .18s,border-color .18s;
  }
  .menu-toggle:hover{background:rgba(255,255,255,.14);border-color:rgba(33,230,180,.5)}
  .menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--light-text);transition:transform .22s ease,opacity .18s ease}
  .menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle.is-open span:nth-child(2){opacity:0}
  .menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .mobile-menu{display:none;border-top:1px solid rgba(255,255,255,.08);background:rgba(22,15,38,.98)}
  .mobile-menu.is-open{display:block}
  .mobile-link{display:block;padding:14px 4px;font-size:15px;color:#D9D0F0;border-bottom:1px solid rgba(255,255,255,.07);transition:color .18s}
  .mobile-link:hover{color:var(--accent)}
  @media(min-width:1024px){.mobile-menu{display:none !important}}

  /* ============ 通用组件 ============ */
  .badge{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.4px;background:var(--brand-100);color:var(--brand-600)}
  .badge-line{background:transparent;border:1px solid rgba(185,174,214,.42);color:var(--light-muted)}
  .badge-accent{background:rgba(33,230,180,.14);color:#12BE95;border:1px solid rgba(33,230,180,.35)}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
  .card::before{content:"";position:absolute;top:0;left:0;height:3px;width:40%;background:linear-gradient(120deg,#6C3BF4,#B23BFF,#FF7A5A)}
  .card-hover{transition:transform .18s ease,box-shadow .18s ease}
  .card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}

  /* ============ 面包屑 ============ */
  .crumbs{padding:16px 0 0;font-size:13px;color:#8B84A0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .crumbs a{color:#8B84A0;transition:color .18s}
  .crumbs a:hover{color:var(--brand-600)}
  .crumbs .sep{margin:0 8px;color:#C6BFD8}
  .crumbs .current{color:var(--brand-600);font-weight:600}

  /* ============ 文章头 ============ */
  .article-head{padding:24px 0 30px;border-bottom:1px solid var(--line)}
  .article-title{font-size:clamp(25px,3.4vw,38px);line-height:1.32;font-weight:800;letter-spacing:-.5px;color:#191326;margin-top:16px}
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin-top:20px;font-size:13.5px;color:var(--muted)}
  .meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C6BFD8}

  /* ============ 版式 ============ */
  .article-layout{display:grid;grid-template-columns:1fr;gap:36px;padding:36px 0 64px}
  @media(min-width:1024px){
    .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:48px 0 80px}
  }

  /* ============ 正文排版 ============ */
  .article-body{max-width:760px;font-size:16px;line-height:1.9;color:#191326;overflow-wrap:break-word}
  .article-body h2{position:relative;font-size:24px;font-weight:700;line-height:1.5;margin:42px 0 16px;padding-left:16px;scroll-margin-top:96px}
  .article-body h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:2px;background:linear-gradient(180deg,#6C3BF4,#21E6B4)}
  .article-body h3{font-size:19px;font-weight:700;line-height:1.6;margin:30px 0 12px;scroll-margin-top:96px}
  .article-body h4{font-size:16.5px;font-weight:700;margin:22px 0 10px}
  .article-body p{margin:0 0 18px}
  .article-body ul,.article-body ol{margin:0 0 18px;padding-left:20px}
  .article-body ul li{position:relative;padding-left:18px;margin-bottom:10px;list-style:none}
  .article-body ul li::before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:2px;background:var(--brand-600)}
  .article-body ol{list-style:decimal}
  .article-body ol li{margin-bottom:10px;padding-left:4px}
  .article-body ol li::marker{color:var(--brand-600);font-weight:700}
  .article-body blockquote{
    margin:26px 0;padding:18px 22px;background:#F3EFFF;border-left:4px solid var(--brand-500);
    border-radius:0 14px 14px 0;color:#3A3350;
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:font-weight .15s}
  .article-body a:hover{font-weight:600}
  .article-body img{border-radius:16px;margin:24px auto;height:auto}
  .article-body figure{margin:26px 0}
  .article-body figcaption{font-size:13px;color:#8B84A0;text-align:center;margin-top:10px}
  .article-body table{
    width:100%;display:block;overflow-x:auto;margin:24px 0;border:1px solid var(--line);
    border-radius:14px;border-collapse:collapse;font-size:14px;line-height:1.7;
  }
  .article-body th{background:var(--brand-100);color:#3A2A6B;font-weight:700;text-align:left;padding:11px 14px;white-space:nowrap}
  .article-body td{padding:11px 14px;border-top:1px solid var(--line);color:#3A3350}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
  .article-body code{background:#F3EFFF;color:#5A32D6;border-radius:6px;padding:2px 6px;font-size:14px}

  /* ============ 侧栏 ============ */
  .sidebar{display:none}
  @media(min-width:1024px){
    .sidebar{display:block}
    .sticky-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
  }
  .side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
  .side-card::before{content:"";position:absolute;top:0;left:0;height:3px;width:40%;background:linear-gradient(120deg,#6C3BF4,#B23BFF,#FF7A5A)}
  .side-title{font-size:14px;font-weight:700;color:#191326;margin-bottom:14px;letter-spacing:.2px}
  .toc-list{max-height:340px;overflow:auto}
  .toc-list a{display:block;font-size:13.5px;line-height:1.65;color:var(--muted);padding:7px 0 7px 12px;border-left:2px solid var(--line);transition:color .18s,border-color .18s}
  .toc-list a:hover{color:var(--brand-600);border-left-color:var(--brand-500)}
  .toc-list a.is-current{color:var(--brand-600);font-weight:600;border-left-color:var(--brand-600)}
  .side-dl-thumb{border-radius:12px;overflow:hidden;border:1px solid var(--line);margin-bottom:14px}
  .side-dl-thumb img{width:100%;height:120px;object-fit:cover}
  .toc-toggle{
    display:inline-flex;align-items:center;justify-content:space-between;gap:10px;width:100%;
    padding:13px 16px;border-radius:12px;background:#fff;border:1px solid var(--line);
    font-size:14px;font-weight:600;color:#191326;cursor:pointer;transition:border-color .18s,background .18s;
  }
  .toc-toggle:hover{border-color:var(--brand-500);background:#F7F4FF}
  .toc-toggle:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
  .toc-panel{display:none;margin-top:12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
  .toc-panel.is-open{display:block}
  @media(min-width:1024px){.toc-mobile{display:none}}

  /* ============ 文末区块 ============ */
  .end-block{padding:0 0 72px}
  .section-title{font-size:clamp(20px,2.4vw,26px);font-weight:700;color:#191326;letter-spacing:-.2px}
  .section-sub{font-size:14.5px;color:var(--muted);margin-top:8px}
  .next-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;position:relative;overflow:hidden}
  .next-card::before{content:"";position:absolute;top:0;left:0;height:3px;width:40%;background:linear-gradient(120deg,#6C3BF4,#B23BFF,#FF7A5A)}
  .next-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#D9CFF5}
  .next-card .arrow{transition:transform .18s ease;color:var(--brand-600)}
  .next-card:hover .arrow{transform:translateX(4px)}
  .rc-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
  .rc-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
  .rc-card img{width:100%;height:150px;object-fit:cover}
  .rc-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px}
  .rc-title{font-size:16px;font-weight:700;line-height:1.55;color:#191326}
  .rc-desc{font-size:13.5px;line-height:1.75;color:var(--muted)}
  .cta-band{
    position:relative;overflow:hidden;border-radius:28px;padding:38px 28px;color:#fff;
    background:linear-gradient(120deg,#6C3BF4,#B23BFF 56%,#FF7A5A);
    box-shadow:0 18px 44px rgba(108,59,244,.28);
  }
  .cta-band::after{
    content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,255,255,.32),transparent 65%);
  }
  @media(min-width:768px){.cta-band{padding:48px 44px}}
  .cta-title{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.3px}
  .cta-sub{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.9);line-height:1.85}
  .btn-white{background:#fff;color:#5A2BE0;border-radius:999px;box-shadow:0 10px 26px rgba(22,15,38,.18)}
  .btn-white:hover{filter:brightness(1.03);transform:translateY(-1px)}
  .btn-ghost-white{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:999px}
  .btn-ghost-white:hover{background:rgba(255,255,255,.24)}

  /* 空态 */
  .empty-state{
    border:1px dashed #CFC5EA;border-radius:var(--radius-md);background:#FBF9FF;
    padding:48px 24px;text-align:center;
  }
  .empty-icon{width:48px;height:48px;border-radius:14px;margin:0 auto 16px;background:var(--brand-100);display:flex;align-items:center;justify-content:center;color:var(--brand-600)}

  /* ============ 页脚 ============ */
  .site-footer{position:relative;background:var(--ink-900);color:var(--light-muted)}
  .site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(127,85,255,.85),rgba(33,230,180,.85),transparent)}
  .footer-link{font-size:14px;color:var(--light-muted);transition:color .18s}
  .footer-link:hover{color:var(--accent)}
  .site-footer a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
  ::selection{background:rgba(108,59,244,.22);color:#1B1030}

/* roulang page: category2 */
:root{
    --ink-900:#160F26;
    --ink-800:#1E1533;
    --brand-600:#6C3BF4;
    --brand-500:#7F55FF;
    --brand-100:#EDE7FF;
    --accent:#21E6B4;
    --coral:#FF7A5A;
    --bg:#F6F4FB;
    --surface:#FFFFFF;
    --line:#E7E2F3;
    --text:#191326;
    --muted:#635C79;
    --inv:#F3EFFF;
    --inv-muted:#B9AED6;
    --r-lg:24px;
    --r-md:18px;
    --r-sm:12px;
    --shadow-sm:0 2px 8px rgba(30,21,51,.06);
    --shadow-md:0 12px 32px rgba(30,21,51,.10);
    --grad:linear-gradient(120deg,#6C3BF4 0%,#B23BFF 55%,#FF7A5A 100%);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',system-ui,sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{text-decoration:none;color:inherit}
  button{font-family:inherit}
  ul,ol{list-style:none;margin:0;padding:0}
  h1,h2,h3,h4,p,dl,dd{margin:0}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

  body .container{
    width:100%;
    max-width:1200px;
    margin-left:auto;
    margin-right:auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:1024px){
    body .container{padding-left:24px;padding-right:24px}
  }

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(22,15,38,.92);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
  }
  .site-header::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:0;
    height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF,#21E6B4,transparent);
    opacity:.8;
  }
  .logo-mark{
    display:inline-block;
    width:30px;height:30px;
    border-radius:9px;
    background:var(--grad);
    box-shadow:0 0 0 1px rgba(33,230,180,.55),0 0 18px rgba(108,59,244,.45);
    position:relative;
    flex:none;
  }
  .logo-mark::after{
    content:"";
    position:absolute;
    inset:9px;
    border-radius:3px;
    background:#160F26;
    opacity:.55;
  }
  .logo-text{
    color:#F3EFFF;
    font-weight:700;
    font-size:18px;
    letter-spacing:.5px;
  }
  .nav-link{
    position:relative;
    font-size:15px;
    color:var(--inv-muted);
    padding:6px 0;
    transition:color .18s ease;
    white-space:nowrap;
  }
  .nav-link:hover{color:#F3EFFF}
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-4px;
    height:2px;
    border-radius:2px;
    background:var(--accent);
    opacity:0;
    transform:scaleX(.4);
    transition:opacity .18s ease,transform .18s ease;
    box-shadow:0 0 12px var(--accent);
  }
  .nav-link:hover::after{opacity:.6;transform:scaleX(1)}
  .nav-link.is-active{color:#F3EFFF;font-weight:600}
  .nav-link.is-active::after{opacity:1;transform:scaleX(1)}

  .menu-toggle{
    width:44px;height:44px;
    display:inline-flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
    border-radius:12px;
    border:1px solid rgba(231,226,243,.18);
    background:rgba(255,255,255,.04);
    cursor:pointer;
    transition:border-color .18s ease,background .18s ease;
  }
  .menu-toggle span{
    display:block;
    width:18px;height:2px;
    border-radius:2px;
    background:#F3EFFF;
    transition:transform .22s ease,opacity .18s ease;
  }
  .menu-toggle:hover{border-color:var(--accent);background:rgba(33,230,180,.08)}
  .menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle.is-open span:nth-child(2){opacity:0}
  .menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .mobile-menu{
    display:none;
    position:fixed;
    left:0;right:0;top:64px;bottom:0;
    background:#160F26;
    border-top:1px solid rgba(231,226,243,.1);
    padding:24px 20px 40px;
    overflow-y:auto;
    z-index:55;
  }
  .mobile-menu.is-open{display:block}
  .mobile-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:14px 4px;
    font-size:16px;
    color:var(--inv-muted);
    border-bottom:1px solid rgba(231,226,243,.08);
    transition:color .18s ease;
  }
  .mobile-link:hover{color:#F3EFFF}
  .mobile-link.is-active{color:#21E6B4;font-weight:600}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    font-weight:600;
    border-radius:14px;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .18s ease,background .18s ease,border-color .18s ease,filter .18s ease,box-shadow .18s ease,color .18s ease;
    white-space:nowrap;
  }
  .btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  .btn-sm{padding:9px 16px;font-size:14px}
  .btn-md{padding:12px 24px;font-size:15px}
  .btn-lg{padding:14px 30px;font-size:16px}
  .btn-pill{border-radius:999px}
  .btn-primary{
    background:var(--grad);
    color:#fff;
    box-shadow:0 10px 24px rgba(108,59,244,.32);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0) scale(.99);box-shadow:0 6px 16px rgba(108,59,244,.28)}
  .btn-ghost{
    background:#fff;
    color:var(--brand-600);
    border:1px solid var(--line);
    box-shadow:var(--shadow-sm);
  }
  .btn-ghost:hover{border-color:var(--brand-500);background:#F7F4FF;transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0) scale(.99)}
  .btn-glass{
    background:rgba(255,255,255,.06);
    color:#F3EFFF;
    border:1px solid rgba(231,226,243,.22);
  }
  .btn-glass:hover{background:rgba(255,255,255,.12);border-color:var(--accent);color:#fff}
  .btn-block{width:100%}

  /* ---------- badges ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:5px 12px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    letter-spacing:.4px;
    background:var(--brand-100);
    color:var(--brand-600);
  }
  .badge-line{
    background:transparent;
    border:1px solid rgba(231,226,243,.22);
    color:var(--inv-muted);
  }
  .badge-accent{
    background:rgba(33,230,180,.12);
    border:1px solid rgba(33,230,180,.45);
    color:#21E6B4;
  }
  .badge-coral{
    background:rgba(255,122,90,.12);
    border:1px solid rgba(255,122,90,.4);
    color:#FF7A5A;
  }

  /* ---------- hero ---------- */
  .hero-dark{
    position:relative;
    background:var(--ink-900);
    overflow:hidden;
  }
  .hero-dark::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center right;
    opacity:.22;
  }
  .hero-dark::after{
    content:"";
    position:absolute;
    inset:0;
    background:
      radial-gradient(58% 70% at 10% 18%,rgba(108,59,244,.48),transparent 62%),
      radial-gradient(48% 58% at 90% 82%,rgba(33,230,180,.20),transparent 66%),
      linear-gradient(92deg,rgba(22,15,38,.96) 0%,rgba(22,15,38,.62) 52%,rgba(22,15,38,.88) 100%);
  }
  .hero-inner{position:relative;z-index:2}
  .hero-title{
    font-size:clamp(30px,4.2vw,50px);
    line-height:1.18;
    font-weight:800;
    letter-spacing:-.5px;
    color:#F3EFFF;
  }
  .hero-sub{
    color:var(--inv-muted);
    font-size:17px;
    line-height:1.9;
    max-width:600px;
  }
  .hero-shot{
    border-radius:20px;
    border:1px solid rgba(231,226,243,.2);
    box-shadow:0 0 0 1px rgba(33,230,180,.28),0 0 36px rgba(108,59,244,.35);
    overflow:hidden;
    background:rgba(255,255,255,.04);
  }
  .hero-shot img{width:100%;height:auto;border-radius:19px}
  .float-card{
    position:absolute;
    background:#fff;
    border-radius:12px;
    box-shadow:var(--shadow-md);
    padding:10px 14px;
    font-size:12px;
    color:var(--muted);
    line-height:1.5;
  }
  .float-card strong{
    display:block;
    font-size:18px;
    font-weight:800;
    color:var(--brand-600);
    font-variant-numeric:tabular-nums;
  }

  /* ---------- breadcrumb ---------- */
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--inv-muted);
    padding:12px 0 20px;
    overflow:hidden;
  }
  .breadcrumb a{transition:color .18s ease}
  .breadcrumb a:hover{color:#21E6B4}
  .breadcrumb .sep{opacity:.45}
  .breadcrumb .current{color:#21E6B4;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

  /* ---------- sections ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-head{max-width:720px}
  .eyebrow{
    font-size:12px;
    font-weight:600;
    letter-spacing:.4px;
    color:var(--brand-600);
    text-transform:uppercase;
  }
  .h2{
    font-size:clamp(24px,3vw,34px);
    font-weight:700;
    line-height:1.3;
    letter-spacing:-.3px;
    color:var(--text);
  }
  .h2-light{color:#F3EFFF}
  .h2-underline{
    position:relative;
    display:inline-block;
    padding-bottom:10px;
  }
  .h2-underline::after{
    content:"";
    position:absolute;
    left:0;bottom:0;
    width:56px;height:3px;
    border-radius:3px;
    background:var(--grad);
  }
  .lead{color:var(--muted);font-size:16px;line-height:1.9}

  /* ---------- cards ---------- */
  .card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:28px;
    box-shadow:var(--shadow-sm);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
    overflow:hidden;
  }
  .card::before{
    content:"";
    position:absolute;
    top:0;left:0;
    height:3px;width:40%;
    background:var(--grad);
    border-radius:0 3px 3px 0;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#D9D0F0}

  .plat-icon{
    width:48px;height:48px;
    border-radius:14px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:22px;
    color:var(--brand-600);
    background:var(--brand-100);
    border:1px solid rgba(108,59,244,.16);
  }
  .spec-list{
    margin-top:18px;
    border-top:1px solid var(--line);
    padding-top:14px;
  }
  .spec-list > div{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:6px 0;
    font-size:14px;
  }
  .spec-list dt{color:var(--muted)}
  .spec-list dd{color:var(--text);font-weight:600}

  /* ---------- steps ---------- */
  .steps{display:grid;gap:24px}
  @media (min-width:768px){.steps{grid-template-columns:repeat(3,1fr)}}
  .step{
    position:relative;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:26px;
    box-shadow:var(--shadow-sm);
    transition:transform .18s ease,box-shadow .18s ease;
  }
  .step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
  .step-num{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;height:42px;
    border-radius:50%;
    background:var(--grad);
    color:#fff;
    font-weight:800;
    font-size:17px;
    box-shadow:0 8px 18px rgba(108,59,244,.28);
  }
  .step h3{font-size:18px;font-weight:700;margin-top:16px}
  .step p{color:var(--muted);font-size:14px;line-height:1.85;margin-top:8px}
  @media (min-width:768px){
    .step::after{
      content:"";
      position:absolute;
      top:47px;left:100%;
      width:24px;
      border-top:1px dashed #C9BEEC;
    }
    .step:last-child::after{display:none}
  }

  /* ---------- table ---------- */
  .table-wrap{
    border:1px solid var(--line);
    border-radius:var(--r-md);
    background:#fff;
    overflow-x:auto;
    box-shadow:var(--shadow-sm);
  }
  .spec-table{
    width:100%;
    min-width:640px;
    border-collapse:collapse;
    font-size:14px;
  }
  .spec-table thead th{
    background:var(--brand-100);
    color:#3A2A66;
    font-weight:700;
    text-align:left;
    padding:14px 18px;
    font-size:13px;
    letter-spacing:.3px;
    white-space:nowrap;
  }
  .spec-table tbody td{
    padding:14px 18px;
    border-top:1px solid var(--line);
    color:var(--muted);
    vertical-align:top;
  }
  .spec-table tbody th{
    padding:14px 18px;
    border-top:1px solid var(--line);
    color:var(--text);
    font-weight:600;
    text-align:left;
    white-space:nowrap;
  }
  .spec-table tbody tr:hover td,.spec-table tbody tr:hover th{background:#FBFAFE}

  /* ---------- verify box ---------- */
  .verify-box{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:28px;
    box-shadow:var(--shadow-sm);
  }
  .hash-row{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px;
    margin-top:16px;
  }
  .hash{
    flex:1 1 260px;
    min-width:0;
    font-family:'SFMono-Regular',Consolas,'Liberation Mono',monospace;
    font-size:13px;
    color:#3A2A66;
    background:#F6F4FB;
    border:1px solid var(--line);
    border-radius:12px;
    padding:12px 14px;
    overflow-x:auto;
    white-space:nowrap;
  }

  /* ---------- faq ---------- */
  .faq-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:8px 28px;
    box-shadow:var(--shadow-sm);
  }
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:last-child{border-bottom:0}
  .faq-q{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    width:100%;
    padding:18px 0;
    font-size:16px;
    font-weight:700;
    color:var(--text);
    text-align:left;
    background:none;
    border:0;
    cursor:pointer;
    transition:color .18s ease;
  }
  .faq-q:hover{color:var(--brand-600)}
  .faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
  .faq-icon{
    flex:none;
    width:26px;height:26px;
    border-radius:50%;
    border:1px solid var(--line);
    display:inline-flex;
    align-items:center;
    justify-content:center;
    color:var(--brand-600);
    font-weight:700;
    font-size:15px;
    line-height:1;
    transition:transform .2s ease,color .2s ease,border-color .2s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);color:#0FB98F;border-color:#21E6B4}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s ease;
  }
  .faq-a p{
    padding:0 0 20px;
    font-size:14px;
    line-height:1.9;
    color:var(--muted);
    max-width:860px;
  }

  /* ---------- cta band ---------- */
  .cta-band{
    position:relative;
    border-radius:28px;
    padding:44px 32px;
    background:
      radial-gradient(70% 120% at 8% 10%,rgba(108,59,244,.85),transparent 62%),
      radial-gradient(60% 110% at 92% 90%,rgba(255,122,90,.55),transparent 66%),
      linear-gradient(120deg,#1E1533,#2A1B4A 60%,#160F26);
    overflow:hidden;
    box-shadow:0 24px 60px rgba(30,21,51,.28);
  }
  @media (min-width:768px){.cta-band{padding:52px 48px}}
  .cta-band::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;
    background-position:center;
    opacity:.16;
  }
  .cta-band > *{position:relative;z-index:2}

  /* ---------- footer ---------- */
  .site-footer{
    position:relative;
    background:var(--ink-900);
    color:var(--inv-muted);
  }
  .site-footer::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;
    height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF,#21E6B4,transparent);
  }
  .footer-link{
    color:var(--inv-muted);
    font-size:14px;
    transition:color .18s ease;
  }
  .footer-link:hover{color:#21E6B4}
  .site-footer h3{letter-spacing:.3px}

  /* ---------- misc ---------- */
  .soft-panel{
    background:linear-gradient(180deg,#FBFAFE 0%,#F3EFFF 100%);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
  }
  .divider-grad{
    height:1px;
    background:linear-gradient(90deg,transparent,var(--line),transparent);
  }

/* roulang page: category3 */
:root{
    --ink-900:#160F26;
    --ink-800:#1E1533;
    --brand-600:#6C3BF4;
    --brand-500:#7F55FF;
    --brand-100:#EDE7FF;
    --accent:#21E6B4;
    --coral:#FF7A5A;
    --bg:#F6F4FB;
    --surface:#FFFFFF;
    --line:#E7E2F3;
    --text:#191326;
    --muted:#635C79;
    --dark-text:#F3EFFF;
    --dark-muted:#B9AED6;
    --radius-lg:24px;
    --radius-md:18px;
    --radius-sm:12px;
    --shadow-sm:0 2px 8px rgba(30,21,51,.06);
    --shadow-md:0 12px 32px rgba(30,21,51,.10);
    --grad:linear-gradient(120deg,#6C3BF4 0%,#B23BFF 55%,#FF7A5A 100%);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
  .num{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-variant-numeric:tabular-nums}
  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media (min-width:1024px){.container{padding-left:24px;padding-right:24px}}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(22,15,38,.92);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,rgba(108,59,244,0),#7F55FF 32%,#21E6B4 68%,rgba(108,59,244,0));
    opacity:.75;
  }
  .header-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
  @media (min-width:1024px){.header-inner{height:72px;gap:32px}}
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .logo-mark{
    width:32px;height:32px;border-radius:10px;display:inline-block;
    background:var(--grad);
    box-shadow:0 0 0 1px rgba(33,230,180,.55),0 6px 18px rgba(108,59,244,.45);
    position:relative;
  }
  .logo-mark::after{
    content:"";position:absolute;inset:9px;border-radius:3px;
    border:1.5px solid rgba(243,239,255,.85);
  }
  .logo-text{color:#FFFFFF;font-size:19px;font-weight:800;letter-spacing:.6px;line-height:1}
  .main-nav{display:none}
  @media (min-width:1024px){.main-nav{display:flex;align-items:center;gap:36px}}
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--dark-muted);
    padding:6px 0;transition:color .18s ease;
  }
  .nav-link:hover{color:#F3EFFF}
  .nav-link.is-active{color:#F3EFFF;font-weight:700}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
    background:var(--accent);box-shadow:0 0 12px rgba(33,230,180,.9);
  }
  .nav-link:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:4px}
  .header-actions{display:flex;align-items:center;gap:12px}
  .header-download{display:none}
  @media (min-width:640px){.header-download{display:inline-flex}}
  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;border-radius:12px;padding:10px 9px;
    border:1px solid rgba(243,239,255,.16);background:rgba(243,239,255,.05);
  }
  .nav-toggle span{display:block;height:2px;border-radius:2px;background:#EDE7FF;transition:transform .22s ease,opacity .22s ease}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media (min-width:1024px){.nav-toggle{display:none}}
  .mobile-drawer{
    display:none;position:fixed;inset:0;z-index:90;
    background:rgba(22,15,38,.98);
    padding:84px 24px 32px;
    flex-direction:column;
    overflow-y:auto;
  }
  .mobile-drawer.is-open{display:flex}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 4px;font-size:17px;font-weight:600;color:var(--dark-muted);
    border-bottom:1px solid rgba(243,239,255,.10);
  }
  .drawer-link:hover,.drawer-link.is-active{color:#F3EFFF}
  .drawer-link.is-active span.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px rgba(33,230,180,.9)}
  .drawer-close{
    position:absolute;top:18px;right:20px;width:42px;height:42px;border-radius:12px;
    border:1px solid rgba(243,239,255,.16);color:#F3EFFF;font-size:20px;line-height:1;
    display:flex;align-items:center;justify-content:center;
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;line-height:1.2;
    padding:13px 24px;border-radius:14px;
    transition:transform .16s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,filter .18s ease;
    white-space:nowrap;
  }
  .btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  .btn-sm{font-size:14px;padding:10px 18px}
  .btn-pill{border-radius:999px}
  .btn-primary{
    background:var(--grad);color:#FFFFFF;
    box-shadow:0 8px 22px rgba(108,59,244,.32);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 12px 28px rgba(108,59,244,.42)}
  .btn-primary:active{transform:scale(.99);filter:brightness(.98)}
  .btn-ghost{
    background:rgba(243,239,255,.06);color:#F3EFFF;
    border:1px solid rgba(243,239,255,.22);
  }
  .btn-ghost:hover{background:rgba(243,239,255,.12);border-color:rgba(33,230,180,.65);box-shadow:0 0 0 1px rgba(33,230,180,.25)}
  .btn-outline{
    background:#FFFFFF;color:var(--brand-600);
    border:1px solid var(--line);
  }
  .btn-outline:hover{border-color:var(--brand-500);background:#F7F4FF}
  .btn-light{background:#FFFFFF;color:var(--brand-600);box-shadow:0 10px 26px rgba(22,15,38,.22)}
  .btn-light:hover{filter:brightness(.98);transform:translateY(-1px)}
  .btn-glass{
    background:rgba(243,239,255,.08);color:#F3EFFF;
    border:1px solid rgba(243,239,255,.22);
  }
  .btn-glass:hover{background:rgba(243,239,255,.16);border-color:rgba(33,230,180,.6)}

  /* ============ 徽章 ============ */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:6px 13px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.4px;line-height:1.5;
  }
  .badge-brand{background:var(--brand-100);color:var(--brand-600)}
  .badge-accent{background:rgba(33,230,180,.12);color:#8FF6DC;border:1px solid rgba(33,230,180,.45)}
  .badge-coral{background:rgba(255,122,90,.14);color:#FF9C82;border:1px solid rgba(255,122,90,.35)}
  .badge-line{background:transparent;border:1px solid rgba(243,239,255,.22);color:var(--dark-muted)}
  .badge-neutral{background:#F1EDFB;color:var(--muted);border:1px solid var(--line)}

  /* ============ 首屏 ============ */
  .page-hero{
    position:relative;overflow:hidden;
    background:var(--ink-900);color:var(--dark-text);
    padding:32px 0 52px;
  }
  @media (min-width:1024px){.page-hero{padding:44px 0 72px}}
  .page-hero .hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center right;
    opacity:.2;
    -webkit-mask-image:linear-gradient(90deg,rgba(0,0,0,.25),rgba(0,0,0,.9));
    mask-image:linear-gradient(90deg,rgba(0,0,0,.25),rgba(0,0,0,.9));
  }
  .page-hero::before{
    content:"";position:absolute;width:640px;height:640px;right:-200px;top:-280px;
    background:radial-gradient(circle,rgba(108,59,244,.55),rgba(108,59,244,0) 66%);
    pointer-events:none;
  }
  .page-hero::after{
    content:"";position:absolute;width:520px;height:520px;left:-220px;bottom:-320px;
    background:radial-gradient(circle,rgba(33,230,180,.22),rgba(33,230,180,0) 64%);
    pointer-events:none;
  }
  .hero-inner{position:relative;z-index:2}
  .breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--dark-muted);padding:0 0 4px}
  .breadcrumb a{color:var(--dark-muted);transition:color .18s ease}
  .breadcrumb a:hover{color:#F3EFFF}
  .crumb-sep{color:rgba(243,239,255,.32)}
  .crumb-current{color:var(--accent);font-weight:700}
  .hero-title{
    font-size:clamp(28px,4.2vw,48px);font-weight:800;line-height:1.2;letter-spacing:-.5px;
    color:#F3EFFF;margin:18px 0 0;max-width:760px;
  }
  .hero-rule{width:72px;height:1px;background:var(--accent);box-shadow:0 0 12px rgba(33,230,180,.85);margin:22px 0 0}
  .hero-sub{margin:18px 0 0;font-size:17px;line-height:1.9;color:var(--dark-muted);max-width:620px}
  .hero-visual{
    border-radius:20px;overflow:hidden;
    box-shadow:0 0 0 1px rgba(33,230,180,.35),0 0 42px rgba(108,59,244,.42);
  }
  .hero-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
  .stat-row{margin-top:34px}
  .stat-item{
    background:rgba(243,239,255,.05);
    border:1px solid rgba(243,239,255,.13);
    border-radius:16px;padding:16px 18px;
    transition:border-color .18s ease,background-color .18s ease;
  }
  .stat-item:hover{border-color:rgba(33,230,180,.42);background:rgba(243,239,255,.08)}
  .stat-num{
    display:block;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:26px;font-weight:800;line-height:1.15;color:var(--accent);
    font-variant-numeric:tabular-nums;letter-spacing:-.5px;
  }
  .stat-label{display:block;margin-top:4px;font-size:12px;color:var(--dark-muted);letter-spacing:.4px}

  /* ============ 通用板块 ============ */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-title{
    font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.3px;
    margin:0;color:var(--text);
  }
  .section-desc{margin:12px 0 0;font-size:15px;line-height:1.9;color:var(--muted);max-width:680px}
  .title-underline{
    display:block;width:56px;height:3px;border-radius:3px;background:var(--grad);margin-top:18px;
  }

  /* ============ 行业筛选 ============ */
  .filter-row{display:flex;flex-wrap:wrap;gap:10px}
  .filter-pill{
    padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;
    background:#FFFFFF;border:1px solid var(--line);color:var(--muted);
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .16s ease;
  }
  .filter-pill:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
  .filter-pill.is-active{
    background:var(--ink-900);color:#FFFFFF;border-color:var(--ink-900);
    box-shadow:0 8px 20px rgba(22,15,38,.22);
  }
  .filter-pill:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

  /* ============ 案例大卡 ============ */
  .case-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-sm);
    position:relative;
    transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  }
  .case-card::before{
    content:"";position:absolute;top:0;left:0;width:40%;height:3px;
    background:var(--grad);border-bottom-right-radius:3px;z-index:3;
  }
  .case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#DAD2F0}
  .case-media{position:relative;overflow:hidden;background:#EDE7FF;min-height:180px}
  .case-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .35s ease}
  .case-card:hover .case-media img{transform:scale(1.03)}
  .case-body{padding:24px}
  @media (min-width:1024px){.case-body{padding:30px 32px}}
  .case-title{font-size:20px;font-weight:700;line-height:1.45;margin:12px 0 0;color:var(--text)}
  @media (min-width:768px){.case-title{font-size:22px}}
  .case-desc{margin:10px 0 0;font-size:15px;line-height:1.9;color:var(--muted)}
  .case-meta{font-size:13px;color:#8C84A3;line-height:1.7}
  .metric-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:20px}
  @media (max-width:519px){.metric-row{grid-template-columns:1fr 1fr}}
  .metric{
    background:linear-gradient(180deg,#FAF8FF,#F4F0FE);
    border:1px solid #EDE7FF;border-radius:var(--radius-sm);
    padding:12px 14px;
  }
  .metric-num{
    display:block;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:20px;font-weight:800;color:var(--brand-600);
    font-variant-numeric:tabular-nums;line-height:1.25;letter-spacing:-.3px;
  }
  .metric-num em{font-style:normal;font-size:13px;font-weight:600;margin-left:2px}
  .metric-label{display:block;font-size:12px;color:var(--muted);margin-top:2px;line-height:1.6}
  .case-quote{
    margin:18px 0 0;padding:14px 18px;
    background:#F8F5FF;border-left:3px solid var(--brand-500);border-radius:0 12px 12px 0;
    font-size:14px;line-height:1.9;color:#4A4363;
  }
  .case-link{
    display:inline-flex;align-items:center;gap:6px;margin-top:18px;
    font-size:14px;font-weight:700;color:var(--brand-600);
    border-bottom:1px solid transparent;transition:border-color .18s ease,gap .18s ease;
  }
  .case-link:hover{border-color:var(--brand-600);gap:10px}
  .case-link:focus-visible{outline:2px solid var(--brand-500);outline-offset:4px;border-radius:4px}

  /* ============ 共性做法 ============ */
  .summary-band{
    background:linear-gradient(120deg,#EDE7FF 0%,#F6F4FB 62%,#EAF7F3 100%);
    border:1px solid #E3DBF7;
    border-radius:28px;
    padding:32px 24px;
  }
  @media (min-width:1024px){.summary-band{padding:52px 56px}}
  .summary-list{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:14px}
  .summary-list li{display:flex;gap:12px;font-size:15px;line-height:1.85;color:#3E3757}
  .summary-list li::before{
    content:"";flex-shrink:0;width:8px;height:8px;border-radius:3px;margin-top:10px;
    background:var(--grad);
  }
  .summary-figure{border-radius:20px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid #E3DBF7;background:#fff}
  .summary-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
  .summary-figure figcaption{font-size:12px;color:var(--muted);padding:10px 14px;background:#fff;line-height:1.7}

  /* ============ 评价墙 ============ */
  .testi-card{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-md);padding:24px;
    box-shadow:var(--shadow-sm);position:relative;
    transition:transform .18s ease-out,box-shadow .18s ease-out;
    height:100%;
  }
  .testi-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
  .avatar{
    width:44px;height:44px;border-radius:50%;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    background:var(--grad);color:#FFFFFF;font-weight:700;font-size:16px;
    box-shadow:0 6px 16px rgba(108,59,244,.28);
  }
  .stars{color:var(--coral);font-size:13px;letter-spacing:2px;line-height:1}
  .testi-name{font-size:15px;font-weight:700;color:var(--text);line-height:1.5}
  .testi-role{font-size:12px;color:#8C84A3;line-height:1.6}
  .testi-text{margin:14px 0 0;font-size:15px;line-height:1.9;color:#3E3757}
  .testi-date{margin-top:16px;font-size:12px;color:#948DA9;font-variant-numeric:tabular-nums;letter-spacing:.3px}

  /* ============ FAQ ============ */
  .faq-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
  .faq-item + .faq-item{border-top:1px solid var(--line)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;text-align:left;font-size:16px;font-weight:700;color:var(--text);
    transition:background-color .18s ease;
  }
  @media (min-width:768px){.faq-q{padding:22px 28px}}
  .faq-q:hover{background:#FAF8FF}
  .faq-q:focus-visible{outline:2px solid var(--brand-500);outline-offset:-2px}
  .faq-icon{
    flex-shrink:0;width:26px;height:26px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);color:var(--brand-600);font-size:16px;line-height:1;
    transition:transform .24s ease,color .18s ease,border-color .18s ease,background-color .18s ease;
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);color:#0F9E7C;border-color:rgba(33,230,180,.6);background:rgba(33,230,180,.12)}
  .faq-a{
    max-height:0;overflow:hidden;
    padding:0 22px;font-size:14px;line-height:1.9;color:var(--muted);
    transition:max-height .28s ease,padding .28s ease;
  }
  @media (min-width:768px){.faq-a{padding:0 28px}}
  .faq-item.is-open .faq-a{max-height:360px;padding:0 22px 22px}
  @media (min-width:768px){.faq-item.is-open .faq-a{padding:0 28px 24px}}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    background:var(--grad);
    border-radius:28px;
    padding:36px 24px;
    color:#FFFFFF;
  }
  @media (min-width:1024px){.cta-band{padding:56px 56px}}
  .cta-band::after{
    content:"";position:absolute;width:420px;height:420px;right:-160px;top:-200px;
    background:radial-gradient(circle,rgba(255,255,255,.28),rgba(255,255,255,0) 68%);
    pointer-events:none;
  }
  .cta-title{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.35;letter-spacing:-.3px;margin:0;position:relative;z-index:2}
  .cta-desc{margin:12px 0 0;font-size:15px;line-height:1.9;color:rgba(255,255,255,.88);max-width:560px;position:relative;z-index:2}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink-900);color:var(--dark-muted);
    border-top:1px solid transparent;
    position:relative;
  }
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,rgba(108,59,244,0),#7F55FF 32%,#21E6B4 68%,rgba(108,59,244,0));
    opacity:.7;
  }
  .footer-link{font-size:14px;color:var(--dark-muted);transition:color .18s ease}
  .footer-link:hover{color:#F3EFFF}
  .footer-link:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}

/* roulang page: category4 */
:root{
    --ink-900:#160F26;
    --ink-800:#1E1533;
    --brand-600:#6C3BF4;
    --brand-500:#7F55FF;
    --brand-100:#EDE7FF;
    --accent:#21E6B4;
    --coral:#FF7A5A;
    --bg:#F6F4FB;
    --card:#FFFFFF;
    --line:#E7E2F3;
    --text:#191326;
    --muted:#635C79;
    --dark-text:#F3EFFF;
    --dark-muted:#B9AED6;
    --radius-lg:24px;
    --radius-md:18px;
    --radius-sm:12px;
    --shadow-sm:0 2px 8px rgba(30,21,51,.06);
    --shadow-md:0 12px 32px rgba(30,21,51,.10);
    --grad-brand:linear-gradient(120deg,#6C3BF4 0%,#B23BFF 55%,#FF7A5A 100%);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  ul{list-style:none;margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:Inter,system-ui,"PingFang SC",sans-serif}

  div.container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){
    div.container{padding-left:24px;padding-right:24px}
  }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(22,15,38,.92);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(243,239,255,.08);
  }
  .site-header::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-1px;
    height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF,#21E6B4,transparent);
    opacity:.75;
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    height:64px;
  }
  @media (min-width:1024px){ .header-inner{height:72px} }

  .logo-link{display:flex;align-items:center;gap:10px;flex:none}
  .logo-mark{
    width:30px;height:30px;border-radius:9px;flex:none;
    background:linear-gradient(120deg,#6C3BF4,#B23BFF 60%,#FF7A5A);
    box-shadow:0 0 0 1px rgba(33,230,180,.55),0 0 18px rgba(108,59,244,.5);
    position:relative;
  }
  .logo-mark::after{
    content:"";position:absolute;inset:8px;border:2px solid rgba(255,255,255,.92);
    border-radius:4px;transform:rotate(45deg);
  }
  .logo-text{
    color:var(--dark-text);
    font-weight:700;
    font-size:18px;
    letter-spacing:.6px;
    white-space:nowrap;
  }

  .nav-link{
    position:relative;
    color:var(--dark-muted);
    font-size:15px;
    font-weight:500;
    padding:6px 0;
    transition:color .18s ease;
  }
  .nav-link:hover{color:var(--dark-text)}
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
    background:var(--accent);opacity:0;transition:opacity .18s ease;
    box-shadow:0 0 12px var(--accent);
  }
  .nav-link:hover::after{opacity:.55}
  .nav-link.is-active{color:var(--dark-text);font-weight:600}
  .nav-link.is-active::after{opacity:1}

  .header-actions{display:flex;align-items:center;gap:10px;flex:none}

  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:40px;height:40px;border-radius:12px;flex:none;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(243,239,255,.18);
    cursor:pointer;transition:background .18s ease,border-color .18s ease;
  }
  .nav-toggle:hover{background:rgba(255,255,255,.12);border-color:rgba(33,230,180,.5)}
  .nav-toggle span{
    display:block;width:18px;height:2px;margin:0 auto;border-radius:2px;
    background:var(--dark-text);transition:transform .2s ease,opacity .2s ease;
  }
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media (min-width:1024px){ .nav-toggle{display:none} }

  .mobile-drawer{
    display:none;
    position:fixed;
    top:64px;left:0;right:0;bottom:0;
    z-index:55;
    background:var(--ink-900);
    padding:20px 24px 32px;
    overflow-y:auto;
  }
  .mobile-drawer.open{display:block}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 2px;
    color:var(--dark-text);
    font-size:16px;
    font-weight:600;
    border-bottom:1px solid rgba(243,239,255,.09);
    transition:color .18s ease;
  }
  .drawer-link:hover{color:var(--accent)}
  .drawer-link.is-active{color:var(--accent)}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:14px;
    font-weight:600;
    font-size:15px;
    padding:12px 22px;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,filter .18s ease;
  }
  .btn-primary{
    background:var(--grad-brand);
    color:#fff;
    box-shadow:0 8px 24px rgba(108,59,244,.35);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
  .btn-primary:active{transform:scale(.99);box-shadow:0 4px 14px rgba(108,59,244,.30)}

  .btn-outline{
    background:#fff;
    border-color:var(--line);
    color:var(--brand-600);
  }
  .btn-outline:hover{border-color:var(--brand-500);background:#F7F4FF}

  .btn-glass{
    background:rgba(255,255,255,.06);
    border-color:rgba(243,239,255,.22);
    color:var(--dark-text);
  }
  .btn-glass:hover{background:rgba(255,255,255,.12);border-color:rgba(33,230,180,.55)}

  .btn-sm{padding:9px 16px;font-size:14px;border-radius:12px}
  .btn-pill{border-radius:999px}

  a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
  }

  /* ---------- 徽章 ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    letter-spacing:.4px;
    padding:5px 12px;
    white-space:nowrap;
  }
  .badge-brand{background:var(--brand-100);color:var(--brand-600)}
  .badge-line{
    background:transparent;
    border:1px solid rgba(33,230,180,.45);
    color:var(--dark-muted);
  }

  /* ---------- 面包屑 ---------- */
  .breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
  .breadcrumb a{color:var(--muted);transition:color .18s ease}
  .breadcrumb a:hover{color:var(--brand-600)}
  .breadcrumb .sep{color:#C3BBD9}
  .breadcrumb .cur{color:var(--brand-600);font-weight:700;max-width:70vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  /* ---------- 帮助首屏 ---------- */
  .hero-support{
    position:relative;
    overflow:hidden;
    background:var(--ink-900);
    color:var(--dark-text);
    padding:44px 0 60px;
  }
  @media (min-width:1024px){ .hero-support{padding:64px 0 84px} }
  .hero-bg{
    position:absolute;inset:0;
    background-image:url(/assets/images/backpic/back-1.png);
    background-size:cover;
    background-position:center;
    opacity:.22;
  }
  .hero-mask{
    position:absolute;inset:0;
    background:
      radial-gradient(58% 80% at 12% 18%,rgba(108,59,244,.55),transparent 65%),
      radial-gradient(48% 70% at 88% 78%,rgba(33,230,180,.16),transparent 70%),
      linear-gradient(90deg,rgba(22,15,38,.95) 0%,rgba(22,15,38,.72) 55%,rgba(22,15,38,.92) 100%);
  }
  .hero-inner{position:relative;z-index:2}
  .hero-title{
    font-size:clamp(28px,4.2vw,46px);
    font-weight:800;
    line-height:1.2;
    letter-spacing:-.5px;
    color:var(--dark-text);
    margin-top:18px;
  }
  .hero-title .hl{
    background:var(--grad-brand);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .hero-sub{
    margin-top:16px;
    max-width:640px;
    font-size:16px;
    line-height:1.9;
    color:var(--dark-muted);
  }

  .search-shell{
    display:flex;
    gap:8px;
    background:#fff;
    border-radius:14px;
    padding:8px;
    max-width:640px;
    margin-top:26px;
    box-shadow:0 16px 40px rgba(9,4,20,.38);
  }
  .search-shell input{
    flex:1;
    min-width:0;
    border:none;
    outline:none;
    background:transparent;
    padding:10px 14px;
    font-size:15px;
    color:var(--text);
    font-family:inherit;
  }
  .search-shell input::placeholder{color:#A9A2BC}
  .search-shell .btn{flex:none}
  @media (max-width:639px){
    .search-shell{flex-direction:column;padding:12px;gap:10px}
    .search-shell .btn{width:100%}
  }
  .hero-hint{
    margin-top:14px;
    font-size:13px;
    color:var(--dark-muted);
  }
  .hero-hint a{color:var(--accent);border-bottom:1px dashed rgba(33,230,180,.45);padding-bottom:1px}
  .hero-hint a:hover{color:#fff}

  /* ---------- 问题分类卡 ---------- */
  .topic-card{
    position:relative;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    padding:26px 24px 24px;
    overflow:hidden;
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .topic-card::before{
    content:"";
    position:absolute;
    top:0;left:24px;
    width:40%;
    height:3px;
    border-radius:0 0 3px 3px;
    background:var(--grad-brand);
  }
  .topic-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-md);
    border-color:#D9D0F5;
  }
  .topic-icon{
    width:46px;height:46px;border-radius:14px;
    display:grid;place-items:center;
    background:var(--brand-100);
    color:var(--brand-600);
    font-size:18px;
    margin-bottom:16px;
    transition:background .18s ease,color .18s ease;
  }
  .topic-card:hover .topic-icon{background:var(--brand-600);color:#fff}
  .topic-title{font-size:18px;font-weight:700;color:var(--text)}
  .topic-desc{margin-top:8px;font-size:14px;line-height:1.85;color:var(--muted)}
  .topic-meta{
    margin-top:16px;
    display:flex;align-items:center;justify-content:space-between;
    font-size:12px;font-weight:600;color:var(--brand-600);letter-spacing:.4px;
  }
  .topic-meta .count{color:#A9A2BC}

  /* ---------- FAQ ---------- */
  .faq-group-title{
    display:flex;align-items:center;gap:10px;
    font-size:14px;font-weight:700;letter-spacing:.4px;
    color:var(--muted);
    margin-bottom:14px;
  }
  .faq-group-title::before{
    content:"";width:16px;height:3px;border-radius:2px;background:var(--grad-brand);
  }
  .faq-card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:6px 24px;
    box-shadow:var(--shadow-sm);
  }
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:last-child{border-bottom:none}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:16px;
    padding:18px 0;
    font-size:16px;
    font-weight:700;
    color:var(--text);
    transition:color .18s ease;
  }
  .faq-item summary:hover{color:var(--brand-600)}
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";
    flex:none;
    font-size:22px;
    font-weight:400;
    line-height:1;
    color:var(--brand-600);
    transition:transform .2s ease,color .2s ease;
  }
  .faq-item[open] summary::after{transform:rotate(45deg);color:var(--accent)}
  .faq-answer{
    padding:0 0 18px;
    font-size:14px;
    line-height:1.9;
    color:var(--muted);
  }
  .faq-answer strong{color:var(--text)}

  /* ---------- 表单 ---------- */
  .form-card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:28px 24px;
    box-shadow:var(--shadow-md);
  }
  @media (min-width:768px){ .form-card{padding:36px 34px} }
  .field{display:block;margin-bottom:18px}
  .field-label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px}
  .req{color:var(--coral);margin-right:4px}
  .input,.select,.textarea{
    width:100%;
    background:#fff;
    border:1px solid var(--line);
    border-radius:12px;
    padding:12px 16px;
    font-size:15px;
    color:var(--text);
    font-family:inherit;
    line-height:1.7;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .textarea{min-height:132px;resize:vertical}
  .input::placeholder,.textarea::placeholder{color:#A9A2BC}
  .input:focus,.select:focus,.textarea:focus{
    outline:none;
    border-color:var(--brand-500);
    box-shadow:0 0 0 3px rgba(108,59,244,.10);
  }
  .field-note{font-size:12px;color:var(--coral);margin-top:6px}
  .field-hint{font-size:12px;color:#A9A2BC;margin-top:6px}
  .form-foot{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    margin-top:8px;
  }
  @media (min-width:768px){
    .form-foot .btn{min-width:160px;margin-left:auto}
  }

  .aside-card{
    background:linear-gradient(160deg,#F7F4FF 0%,#FFFFFF 70%);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:24px;
    box-shadow:var(--shadow-sm);
  }
  .aside-card + .aside-card{margin-top:20px}
  .aside-list li{
    display:flex;align-items:flex-start;gap:10px;
    font-size:14px;color:var(--muted);line-height:1.8;
    padding:9px 0;
    border-bottom:1px dashed var(--line);
  }
  .aside-list li:last-child{border-bottom:none}
  .aside-list i{color:var(--brand-600);margin-top:5px;font-size:13px}

  /* ---------- CTA 条 ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:28px;
    padding:40px 26px;
    background:linear-gradient(120deg,#6C3BF4 0%,#8D3BFA 45%,#FF7A5A 100%);
    color:#fff;
    box-shadow:0 20px 48px rgba(108,59,244,.32);
  }
  @media (min-width:768px){ .cta-band{padding:52px 48px} }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(60% 100% at 90% 10%,rgba(33,230,180,.30),transparent 65%);
    pointer-events:none;
  }
  .cta-band > *{position:relative;z-index:2}
  .cta-title{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.3}
  .cta-sub{margin-top:10px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.86);max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
  .cta-actions .btn-white{background:#fff;color:var(--brand-600);box-shadow:0 10px 26px rgba(22,15,38,.22)}
  .cta-actions .btn-white:hover{transform:translateY(-1px);filter:brightness(1.02)}
  .cta-actions .btn-ghost{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);color:#fff}
  .cta-actions .btn-ghost:hover{background:rgba(255,255,255,.24)}

  /* ---------- 页脚 ---------- */
  .site-footer{
    position:relative;
    background:var(--ink-900);
    color:var(--dark-muted);
    border-top:1px solid rgba(243,239,255,.08);
  }
  .site-footer::before{
    content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,#7F55FF,#21E6B4,transparent);
  }
  .footer-link{
    color:var(--dark-muted);
    font-size:14px;
    transition:color .18s ease;
  }
  .footer-link:hover{color:var(--dark-text)}

  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important}
  }