/* roulang page: index */
:root{
    --brand-50:#EEF4FF; --brand-100:#DCE8FB; --brand-300:#8FB4EE;
    --brand-500:#2B6FE3; --brand-600:#1B5AC9; --brand-700:#14459C; --brand-900:#0B2A63;
    --accent:#FF7A2F; --accent-soft:#FFF1E6;
    --ink:#0E1826; --ink-2:#46586E; --line:#E3EAF3; --bg:#F6F9FD; --surface:#FFFFFF;
    --radius-card:16px; --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
    --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0; background:var(--bg); color:var(--ink-2);
    font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
    font-size:16px; line-height:1.85; -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0; list-style:none;}
  a{color:inherit; text-decoration:none; transition:color .2s ease, background-color .2s ease;}
  img{max-width:100%; display:block;}
  button,input,select,textarea{font:inherit; color:inherit;}
  button{cursor:pointer; background:none; border:0;}
  :focus-visible{outline:3px solid rgba(43,111,227,.35); outline-offset:2px; border-radius:6px;}
  .num{font-variant-numeric:tabular-nums;}

  .container{max-width:1200px; margin:0 auto; padding:0 16px;}
  @media (min-width:768px){ .container{padding:0 24px;} }
  @media (min-width:1280px){ .container{max-width:1280px; padding:0 32px;} }

  .top-bar{height:3px; background:linear-gradient(90deg,var(--brand-600),var(--brand-500) 45%,var(--accent));}

  /* ---------- Header ---------- */
  .site-header{background:#fff; border-bottom:1px solid var(--line);}
  .brand-row{height:64px; display:flex; align-items:center; justify-content:space-between; gap:16px;}
  .brand{display:flex; align-items:center; gap:10px; min-width:0;}
  .brand-mark{width:38px; height:38px; border-radius:11px; background:linear-gradient(140deg,var(--brand-600),var(--brand-500)); display:flex; align-items:center; justify-content:center; flex:0 0 auto;}
  .brand-name{font-size:17px; font-weight:700; color:var(--ink); letter-spacing:-.01em; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
  .brand-sub{font-size:12px; color:var(--ink-2); line-height:1.2;}
  .header-meta{display:flex; align-items:center; gap:22px; font-size:13px; color:var(--ink-2);}
  .header-meta .meta-item{display:flex; align-items:center; gap:6px;}
  .header-actions{display:flex; align-items:center; gap:10px;}

  .btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; height:44px; padding:0 20px; border-radius:var(--radius-btn); font-size:15px; font-weight:600; white-space:nowrap; transition:all .2s ease-out;}
  .btn-primary{background:var(--brand-600); color:#fff;}
  .btn-primary:hover{background:var(--brand-700); transform:translateY(-1px); box-shadow:var(--shadow-hover);}
  .btn-primary:active{transform:translateY(0); filter:brightness(.96);}
  .btn-secondary{background:#fff; border:1px solid var(--line); color:var(--brand-600);}
  .btn-secondary:hover{background:var(--brand-50); border-color:var(--brand-500);}
  .btn-lg{height:48px; padding:0 26px; font-size:16px;}
  .icon-btn{width:40px; height:40px; border-radius:10px; border:1px solid var(--line); background:#fff; display:inline-flex; align-items:center; justify-content:center; color:var(--ink-2);}
  .icon-btn:hover{background:var(--brand-50); color:var(--brand-600); border-color:var(--brand-300);}

  /* ---------- Nav ---------- */
  .nav-row{position:sticky; top:0; z-index:40; background:var(--bg); border-bottom:1px solid var(--line); transition:background .2s ease;}
  .nav-row.is-stuck{background:rgba(255,255,255,.88); backdrop-filter:blur(6px); box-shadow:0 6px 20px -18px rgba(11,42,99,.6);}
  .nav-inner{display:flex; align-items:center; gap:8px; height:52px;}
  .nav-scroll{display:flex; align-items:center; gap:6px; overflow-x:auto; scrollbar-width:none; -ms-overflow-style:none; flex:1;}
  .nav-scroll::-webkit-scrollbar{display:none;}
  .nav-link{position:relative; display:inline-flex; align-items:center; gap:6px; padding:8px 14px; border-radius:999px; font-size:15px; font-weight:500; color:var(--ink-2); white-space:nowrap; transition:all .2s ease;}
  .nav-link:hover{background:var(--brand-50); color:var(--brand-600);}
  .nav-link.active{background:var(--brand-50); color:var(--brand-600); font-weight:600;}
  .nav-link.active::after{content:""; position:absolute; left:50%; transform:translateX(-50%); bottom:-11px; width:22px; height:3px; border-radius:3px; background:var(--brand-600);}
  .nav-fade{width:32px; align-self:stretch; background:linear-gradient(90deg,rgba(246,249,253,0),var(--bg)); pointer-events:none;}
  .nav-row.is-stuck .nav-fade{background:linear-gradient(90deg,rgba(255,255,255,0),#fff);}
  .hamburger{display:none;}

  /* ---------- Drawer ---------- */
  .drawer-mask{position:fixed; inset:0; background:rgba(11,42,99,.5); opacity:0; visibility:hidden; transition:opacity .24s ease; z-index:60;}
  .drawer{position:fixed; top:0; right:0; bottom:0; width:280px; background:#fff; z-index:61; transform:translateX(100%); transition:transform .24s ease-out; padding:20px; overflow-y:auto;}
  .drawer.open{transform:translateX(0);}
  .drawer-mask.open{opacity:1; visibility:visible;}
  .drawer-head{display:flex; align-items:center; justify-content:space-between; padding-bottom:16px; border-bottom:1px solid var(--line);}
  .drawer-link{display:block; padding:13px 12px; border-radius:10px; font-size:15px; color:var(--ink-2); font-weight:500;}
  .drawer-link:hover,.drawer-link.active{background:var(--brand-50); color:var(--brand-600);}

  /* ---------- Section ---------- */
  .section{padding:56px 0;}
  @media (min-width:768px){ .section{padding:80px 0;} }
  @media (min-width:1024px){ .section{padding:92px 0;} }
  .section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:30px; flex-wrap:wrap;}
  .section-title{position:relative; padding-left:14px; font-size:clamp(22px,3vw,32px); line-height:1.35; font-weight:700; color:var(--ink); letter-spacing:-.01em;}
  .section-title::before{content:""; position:absolute; left:0; top:8px; bottom:8px; width:4px; border-radius:3px; background:var(--brand-500);}
  .section-desc{font-size:15px; color:var(--ink-2); max-width:640px; margin-top:12px;}
  .text-link{color:var(--brand-600); font-weight:600; font-size:15px; display:inline-flex; align-items:center; gap:6px;}
  .text-link:hover{text-decoration:underline; text-underline-offset:4px; text-decoration-color:var(--accent);}
  .text-link svg{transition:transform .2s ease;}
  .text-link:hover svg{transform:translateX(2px);}

  .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:6px 14px; border-radius:999px; background:var(--brand-50); color:var(--brand-600); font-size:12px; font-weight:600; letter-spacing:.02em;}

  /* ---------- Hero ---------- */
  .hero{position:relative; overflow:hidden; padding:44px 0 56px; background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);}
  .hero::after{content:""; position:absolute; right:-80px; bottom:-120px; width:420px; height:420px; background:repeating-linear-gradient(45deg,rgba(20,69,156,.06) 0 1px,transparent 1px 12px); pointer-events:none;}
  .hero-grid{display:grid; grid-template-columns:1fr; gap:40px; align-items:center; position:relative; z-index:1;}
  @media (min-width:1024px){ .hero-grid{grid-template-columns:6fr 6fr; gap:48px;} .hero{padding:64px 0 84px;} }
  .hero h1{font-size:clamp(28px,4.6vw,44px); line-height:1.25; font-weight:700; color:var(--ink); letter-spacing:-.01em; margin-top:18px;}
  .hero-sub{margin-top:18px; font-size:16px; line-height:1.85; color:var(--ink-2); max-width:560px;}
  .hero-cta{display:flex; flex-wrap:wrap; gap:12px; margin-top:28px;}
  .trust-row{display:flex; flex-wrap:wrap; gap:18px; margin-top:28px; font-size:13px; color:var(--ink-2);}
  .trust-item{display:flex; align-items:center; gap:6px;}

  .hero-visual{position:relative; border-radius:20px; overflow:hidden; box-shadow:var(--shadow-hover); aspect-ratio:16/11;}
  .hero-visual img{width:100%; height:100%; object-fit:cover;}
  .hero-visual::before{content:""; position:absolute; inset:0; background:rgba(11,42,99,.35);}
  .phone-card{position:absolute; right:18px; bottom:18px; width:196px; background:#fff; border-radius:16px; padding:14px; box-shadow:0 18px 40px -16px rgba(11,42,99,.55);}
  .phone-bar{height:6px; width:56px; border-radius:999px; background:var(--brand-100); margin-bottom:12px;}
  .phone-field{height:32px; border-radius:8px; border:1px solid var(--line); background:var(--bg); margin-bottom:10px;}
  .phone-btn{height:36px; border-radius:8px; background:var(--brand-600); display:flex; align-items:center; justify-content:center; color:#fff;}
  @media (max-width:520px){ .phone-card{width:160px; right:12px; bottom:12px; padding:12px;} }

  /* ---------- Cards ---------- */
  .card{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-card); box-shadow:var(--shadow-card); transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease;}
  .card:hover{transform:translateY(-2px); box-shadow:var(--shadow-hover);}
  .card-pad{padding:24px;}
  @media (min-width:768px){ .card-pad{padding:28px;} }
  .card h3{font-size:20px; font-weight:600; color:var(--ink); line-height:1.5;}
  .card p{font-size:15px; color:var(--ink-2);}
  .card:hover h3{color:var(--brand-600);}
  .icon-round{width:40px; height:40px; border-radius:999px; background:var(--brand-50); color:var(--brand-600); display:flex; align-items:center; justify-content:center; flex:0 0 auto;}

  .q-card{position:relative; padding-left:22px;}
  .q-card::before{content:""; position:absolute; left:0; top:26px; bottom:26px; width:4px; border-radius:3px; background:var(--brand-300);}
  .q-card h3{font-size:17px; font-weight:600; color:var(--ink); line-height:1.6;}

  .check-list li{display:flex; align-items:flex-start; gap:8px; font-size:14px; color:var(--ink-2); line-height:1.8;}
  .check-list svg{flex:0 0 auto; margin-top:6px; color:var(--brand-500);}

  .data-band{background:var(--brand-900); color:#fff; border-radius:20px; padding:36px 24px; position:relative; overflow:hidden;}
  .data-band::before{content:""; position:absolute; left:24px; top:36px; width:3px; height:52px; border-radius:3px; background:var(--accent);}
  @media (min-width:768px){ .data-band{padding:48px 40px;} }
  .data-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:28px 20px;}
  @media (min-width:1024px){ .data-grid{grid-template-columns:repeat(4,1fr); gap:32px;} }
  .data-num{font-size:clamp(30px,4vw,40px); line-height:1.1; font-weight:700; color:#fff;}
  .data-num .unit{font-size:18px; font-weight:600; margin-left:2px;}
  .data-num em{font-style:normal; color:var(--accent);}
  .data-label{font-size:14px; color:rgba(255,255,255,.78); margin-top:6px;}

  /* ---------- News ---------- */
  .news-main-img{aspect-ratio:16/9; width:100%; object-fit:cover; border-radius:14px; transition:transform .35s ease;}
  .news-main:hover .news-main-img{transform:scale(1.03);}
  .news-main h3{font-size:20px; font-weight:700; color:var(--ink); line-height:1.5; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;}
  .news-main:hover h3{color:var(--brand-600);}
  .news-side{display:flex; flex-direction:column; justify-content:center;}
  .news-side-item{padding:16px 0; border-bottom:1px solid var(--line);}
  .news-side-item:first-child{padding-top:0;}
  .news-side-item h4{font-size:16px; font-weight:600; color:var(--ink); line-height:1.65; display:-webkit-box; -webkit-line-clamp:1; -webkit-box-orient:vertical; overflow:hidden;}
  .news-side-item:hover h4{color:var(--brand-600);}
  .meta-line{display:flex; align-items:center; gap:12px; font-size:13px; color:var(--ink-2); margin-top:8px; flex-wrap:wrap;}
  .badge{display:inline-flex; align-items:center; padding:4px 10px; border-radius:999px; background:var(--brand-50); color:var(--brand-600); font-size:12px; font-weight:600; line-height:1;}
  .empty-box{border:1px dashed var(--line); border-radius:var(--radius-card); min-height:220px; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px; color:var(--ink-2); font-size:14px; background:#fff;}
  .line-clamp-2{display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;}

  /* ---------- Form ---------- */
  .form-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius-card); box-shadow:var(--shadow-card); padding:26px;}
  @media (min-width:768px){ .form-card{padding:32px;} }
  .field{display:flex; flex-direction:column; gap:8px; margin-bottom:18px;}
  .field label{font-size:14px; font-weight:600; color:var(--ink);}
  .field .req{color:var(--accent); margin-left:2px;}
  .input,.select,.textarea{width:100%; border:1px solid var(--line); border-radius:var(--radius-btn); background:#fff; padding:11px 14px; font-size:15px; color:var(--ink); line-height:1.6; transition:border-color .2s ease, box-shadow .2s ease;}
  .input:focus,.select:focus,.textarea:focus{outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(43,111,227,.15);}
  .textarea{min-height:112px; resize:vertical;}
  .hint{font-size:13px; color:var(--ink-2); line-height:1.6;}
  .check-inline{display:flex; align-items:flex-start; gap:8px; font-size:13px; color:var(--ink-2); line-height:1.7;}
  .check-inline input{width:16px; height:16px; margin-top:4px; flex:0 0 auto; accent-color:var(--brand-600);}
  .service-list li{display:flex; align-items:flex-start; gap:10px; font-size:15px; color:var(--ink-2); line-height:1.8;}

  /* ---------- FAQ ---------- */
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{width:100%; display:flex; align-items:center; justify-content:space-between; gap:16px; text-align:left; padding:20px 0; font-size:16px; font-weight:600; color:var(--ink); line-height:1.6;}
  .faq-q:hover{color:var(--brand-600);}
  .faq-sign{width:26px; height:26px; border-radius:999px; background:var(--brand-50); color:var(--brand-600); display:flex; align-items:center; justify-content:center; flex:0 0 auto; transition:transform .2s ease;}
  .faq-item.open .faq-sign{transform:rotate(180deg); background:var(--brand-600); color:#fff;}
  .faq-a{overflow:hidden; max-height:0; transition:max-height .22s ease;}
  .faq-a p{font-size:15px; line-height:1.85; color:var(--ink-2); padding:0 0 20px;}

  /* ---------- CTA ---------- */
  .privacy-strip{background:var(--brand-50); border:1px solid var(--brand-100); border-radius:14px; padding:16px 20px; font-size:14px; color:var(--brand-700); display:flex; gap:10px; align-items:flex-start;}
  .cta-band{background:linear-gradient(120deg,var(--brand-700),var(--brand-600)); border-radius:20px; padding:36px 24px; color:#fff; display:flex; flex-direction:column; gap:22px; align-items:flex-start;}
  @media (min-width:1024px){ .cta-band{flex-direction:row; align-items:center; justify-content:space-between; padding:44px 44px;} }
  .cta-band h2{font-size:clamp(22px,3vw,30px); font-weight:700; line-height:1.4; color:#fff;}
  .cta-band p{color:rgba(255,255,255,.85); font-size:15px; margin-top:10px; max-width:560px;}
  .btn-white{background:#fff; color:var(--brand-700); height:48px; padding:0 28px; border-radius:var(--radius-btn); font-weight:600; display:inline-flex; align-items:center; gap:8px;}
  .btn-white:hover{background:var(--brand-50); transform:translateY(-1px);}

  /* ---------- Modal ---------- */
  .modal-mask{position:fixed; inset:0; background:rgba(11,42,99,.5); display:flex; align-items:center; justify-content:center; padding:20px; opacity:0; visibility:hidden; transition:opacity .2s ease; z-index:70;}
  .modal-mask.open{opacity:1; visibility:visible;}
  .modal{width:100%; max-width:448px; background:#fff; border-radius:18px; padding:28px; position:relative; transform:translateY(10px); transition:transform .22s ease-out;}
  .modal-mask.open .modal{transform:translateY(0);}
  .modal-close{position:absolute; top:14px; right:14px; width:32px; height:32px; border-radius:999px; background:var(--bg); color:var(--ink-2); display:flex; align-items:center; justify-content:center;}
  .modal-close:hover{background:var(--brand-50); color:var(--brand-600);}
  @media (max-width:640px){
    .modal-mask{align-items:flex-end; padding:0;}
    .modal{max-width:100%; border-radius:18px 18px 0 0; transform:translateY(100%);}
    .modal-mask.open .modal{transform:translateY(0);}
  }

  /* ---------- Footer ---------- */
  .site-footer{background:var(--bg); border-top:1px solid var(--line); margin-top:56px;}
  .footer-grid{display:grid; grid-template-columns:1fr; gap:32px; padding:48px 0 36px;}
  @media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; padding:56px 0 44px;} }
  .footer-title{font-size:15px; font-weight:600; color:var(--ink); margin-bottom:14px;}
  .footer-link{display:block; font-size:14px; color:var(--ink-2); padding:6px 0;}
  .footer-link:hover{color:var(--brand-600);}
  .footer-bottom{border-top:1px solid var(--line); padding:18px 0 28px; display:flex; flex-wrap:wrap; gap:10px 20px; justify-content:space-between; font-size:13px; color:var(--ink-2);}

  @media (max-width:1023px){
    .header-meta{display:none;}
    .header-actions .btn-secondary{display:none;}
    .header-actions .btn-primary{display:none;}
    .hamburger{display:inline-flex;}
    .nav-row{display:none;}
  }
  @media (max-width:520px){
    .brand-sub{display:none;}
    .brand-name{font-size:15px;}
  }

/* roulang page: article */
:root{
  --brand-50:#EEF4FF;
  --brand-100:#DCE8FB;
  --brand-300:#8FB4EE;
  --brand-500:#2B6FE3;
  --brand-600:#1B5AC9;
  --brand-700:#14459C;
  --brand-900:#0B2A63;
  --accent:#FF7A2F;
  --accent-soft:#FFF1E6;
  --ink:#0E1826;
  --ink-2:#46586E;
  --line:#E3EAF3;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
  --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;border-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer;background:none;border:none;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:2px;border-radius:6px}
.no-scrollbar{scrollbar-width:none;-ms-overflow-style:none}
.no-scrollbar::-webkit-scrollbar{display:none}
.tnum{font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px}}
@media (min-width:1280px){.container{max-width:1280px;padding-left:32px;padding-right:32px}}

.top-stripe{height:3px;background:linear-gradient(90deg,var(--brand-500),var(--brand-300) 48%,var(--accent))}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line)}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:8px 0}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand-500),var(--brand-700));display:inline-flex;align-items:center;justify-content:center;flex:none;box-shadow:0 6px 16px -8px rgba(20,69,156,.7)}
.brand-name{display:block;font-size:15px;font-weight:700;line-height:1.25;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:230px}
.brand-sub{display:block;font-size:12px;line-height:1.4;color:var(--ink-2)}
.header-meta{display:none;align-items:center;gap:22px;font-size:13px;color:var(--ink-2);flex:1;justify-content:center}
@media (min-width:1024px){.header-meta{display:flex}}
.meta-item{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.meta-item svg{color:var(--brand-500);flex:none}
.header-actions{display:flex;align-items:center;gap:10px;flex:none}
.icon-btn{width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease-out}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-300);background:var(--brand-50)}
.header-actions .btn-secondary{display:none}
@media (min-width:1024px){.header-actions .btn-secondary{display:inline-flex}}
.hamburger{display:inline-flex}
@media (min-width:1024px){.hamburger{display:none}}
.header-actions .btn-primary{display:none}
@media (min-width:640px){.header-actions .btn-primary{display:inline-flex}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 18px;border-radius:var(--r-btn);font-size:14px;font-weight:600;border:1px solid transparent;transition:background .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out,color .2s ease-out;white-space:nowrap}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(20,69,156,.75)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-secondary{background:#fff;color:var(--brand-600);border-color:var(--line)}
.btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-500)}
.btn-lg{height:48px;padding:0 24px;font-size:15px}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}

/* ---------- channel nav ---------- */
.channel-nav{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40;transition:background .2s ease-out,box-shadow .2s ease-out}
.channel-nav.is-stuck{background:rgba(255,255,255,.86);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 6px 20px -16px rgba(20,69,156,.55)}
.channel-scroll{display:flex;align-items:center;gap:6px;height:52px;overflow-x:auto}
.channel-link{position:relative;display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:var(--r-pill);font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap;transition:background .2s ease-out,color .2s ease-out}
.channel-link svg{flex:none;opacity:.85}
.channel-link:hover{background:var(--brand-50);color:var(--brand-600)}
.channel-link.active{background:var(--brand-50);color:var(--brand-600)}
.channel-link.active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-9px;width:22px;height:3px;border-radius:3px;background:var(--brand-600)}

/* ---------- article hero ---------- */
.article-hero{position:relative;overflow:hidden;background:var(--brand-900);padding:30px 0 40px}
.article-hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.38}
.article-hero-veil{position:absolute;inset:0;background:linear-gradient(118deg,rgba(11,42,99,.94) 0%,rgba(20,69,156,.78) 58%,rgba(11,42,99,.86) 100%)}
.article-hero-inner{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);min-width:0}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .2s ease-out}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:#fff;max-width:52vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media (min-width:1024px){.breadcrumb .current{max-width:420px}}
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1;background:var(--brand-50);color:var(--brand-600)}
.badge-on-dark{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.28)}
.article-title{font-size:clamp(23px,3.6vw,36px);line-height:1.34;font-weight:700;letter-spacing:-.01em;color:#fff;margin:16px 0 14px;max-width:900px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13px;color:rgba(255,255,255,.8)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.5)}
.article-meta .mi{display:inline-flex;align-items:center;gap:6px}
.article-meta svg{opacity:.8}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:1fr;gap:24px;padding:26px 0 0}
@media (min-width:1024px){.article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:40px;padding-top:44px}}
.article-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:22px}
@media (min-width:768px){.article-main{padding:36px 38px}}
.article-body{max-width:820px;font-size:16px;line-height:1.9;color:var(--ink-2);word-wrap:break-word}
.article-body p{margin:0 0 1.35em}
.article-body h2{font-size:clamp(19px,2.1vw,23px);line-height:1.45;font-weight:700;color:var(--ink);margin:1.9em 0 .75em;padding-left:12px;border-left:4px solid var(--brand-500);border-radius:2px}
.article-body h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink);margin:1.6em 0 .6em}
.article-body h4{font-size:16px;line-height:1.6;font-weight:600;color:var(--ink);margin:1.4em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1.35em;padding-left:1.35em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.45em}
.article-body ul li::marker{color:var(--brand-300)}
.article-body ol li::marker{color:var(--brand-500);font-weight:600}
.article-body strong{color:var(--ink);font-weight:600}
.article-body a{color:var(--brand-600);border-bottom:1px solid var(--brand-300);transition:border-color .2s ease-out,color .2s ease-out}
.article-body a:hover{color:var(--brand-700);border-bottom-color:var(--accent)}
.article-body blockquote{margin:1.5em 0;padding:14px 18px;background:var(--brand-50);border-left:4px solid var(--brand-300);border-radius:0 10px 10px 0;color:var(--ink-2);font-size:15px}
.article-body img{border-radius:12px;margin:1.5em auto;box-shadow:var(--shadow-card)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:10px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0}
.article-body .table-scroll{overflow-x:auto;margin:1.5em 0;border:1px solid var(--line);border-radius:12px}
.article-body table{width:100%;min-width:520px;border-collapse:collapse;font-size:14px}
.article-body th{background:var(--brand-50);color:var(--brand-700);font-weight:600;text-align:left}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even) td{background:#FAFCFF}
.article-body tbody tr:last-child td{border-bottom:none}
.article-body code{background:var(--brand-50);color:var(--brand-700);padding:2px 6px;border-radius:6px;font-size:14px}

.empty-state{border:1px dashed var(--line);border-radius:14px;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:32px 20px;background:#FBFDFF}
.empty-state svg{color:var(--brand-300)}
.empty-state p{font-size:14px;color:var(--ink-2)}

/* ---------- sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:18px}
@media (min-width:1024px){.sidebar{position:sticky;top:88px;align-self:start}}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:20px}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:12px}
.side-title::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--brand-500)}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:9px;font-size:14px;color:var(--ink-2);transition:background .2s ease-out,color .2s ease-out}
.side-link:hover{background:var(--brand-50);color:var(--brand-600)}
.side-link svg{flex:none;opacity:.6;transition:transform .2s ease-out}
.side-link:hover svg{transform:translateX(2px);opacity:1}
.side-list li + li{border-top:1px solid var(--line)}
.side-hot{display:flex;gap:10px;padding:11px 0;font-size:14px;color:var(--ink-2);transition:color .2s ease-out}
.side-hot:hover{color:var(--brand-600)}
.side-hot .idx{flex:none;width:20px;height:20px;border-radius:6px;background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;margin-top:3px;font-variant-numeric:tabular-nums}
.side-hot .idx.top{background:var(--accent-soft);color:var(--accent)}
.side-cta{background:linear-gradient(160deg,var(--brand-900),var(--brand-700));color:#fff;border:none}
.side-cta p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.82);margin:8px 0 16px}
.side-cta .side-title{color:#fff}
.side-cta .side-title::before{background:var(--accent)}

/* ---------- recommend ---------- */
.section{padding:48px 0 0}
@media (min-width:1024px){.section{padding:72px 0 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.section-title{font-size:clamp(20px,2.4vw,26px);line-height:1.4;font-weight:700;color:var(--ink)}
.section-sub{font-size:14px;color:var(--ink-2);margin-top:8px;max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);border-bottom:1px solid transparent;transition:color .2s ease-out,border-color .2s ease-out}
.text-link svg{transition:transform .2s ease-out}
.text-link:hover{border-bottom-color:var(--accent)}
.text-link:hover svg{transform:translateX(2px)}
.rec-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.rec-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.rec-grid{grid-template-columns:repeat(3,1fr)}}
.rec-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-100)}
.rec-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50)}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.rec-card:hover .rec-thumb img{transform:scale(1.03)}
.rec-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-title{font-size:16px;line-height:1.55;font-weight:600;color:var(--ink);transition:color .2s ease-out}
.rec-card:hover .rec-title{color:var(--brand-600)}
.rec-desc{font-size:14px;line-height:1.8;color:var(--ink-2)}
.rec-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-2);padding-top:4px}

/* ---------- cta band ---------- */
.cta-wrap{padding:48px 0 0}
@media (min-width:1024px){.cta-wrap{padding:72px 0 0}}
.cta-band{position:relative;overflow:hidden;background:var(--brand-900);border-radius:20px;padding:32px 26px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px}
@media (min-width:768px){.cta-band{padding:40px 44px}}
.cta-band::after{content:"";position:absolute;right:-60px;top:-40px;width:240px;height:240px;border-radius:50%;background:rgba(43,111,227,.22);filter:blur(6px)}
.cta-band-inner{position:relative;z-index:2;max-width:640px}
.cta-band h2{font-size:clamp(19px,2.4vw,26px);line-height:1.4;font-weight:700;color:#fff}
.cta-band p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.8);margin-top:10px}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:#F6F9FD;border-top:1px solid var(--line);margin-top:56px}
@media (min-width:1024px){.site-footer{margin-top:88px}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.35fr 1fr 1fr 1.1fr;gap:36px;padding:56px 0 36px}}
.footer-title{font-size:15px;font-weight:700;color:var(--brand-900);margin-bottom:14px}
.footer-link{display:block;font-size:14px;color:var(--ink-2);padding:5px 0;transition:color .2s ease-out}
.footer-link:hover{color:var(--brand-600)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;border-top:1px solid var(--line);padding:18px 0 24px;font-size:13px;color:var(--ink-2)}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(11,42,99,.5);opacity:0;visibility:hidden;transition:opacity .25s ease-out,visibility .25s ease-out;z-index:60}
.drawer{position:fixed;top:0;right:0;width:280px;max-width:84vw;height:100%;background:#fff;transform:translateX(100%);transition:transform .28s ease-out;z-index:61;padding:20px;display:flex;flex-direction:column;gap:6px;overflow-y:auto}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink)}
.drawer-link{display:flex;align-items:center;justify-content:space-between;padding:12px 12px;border-radius:10px;font-size:14px;font-weight:600;color:var(--ink-2);transition:background .2s ease-out,color .2s ease-out}
.drawer-link:hover,.drawer-link.active{background:var(--brand-50);color:var(--brand-600)}
.drawer-foot{margin-top:auto;padding-top:18px;display:flex;flex-direction:column;gap:10px}

/* roulang page: category1 */
:root{
    --brand-50:#EEF4FF;
    --brand-100:#DCE8FB;
    --brand-300:#8FB4EE;
    --brand-500:#2B6FE3;
    --brand-600:#1B5AC9;
    --brand-700:#14459C;
    --brand-900:#0B2A63;
    --accent:#FF7A2F;
    --accent-soft:#FFF1E6;
    --ink:#0E1826;
    --ink-2:#46586E;
    --line:#E3EAF3;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --r-card:16px;
    --r-btn:10px;
    --r-img:12px;
    --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
    --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:124px;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--ink-2);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color .2s ease-out;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input,select,textarea{font:inherit;color:inherit;}
  .num{font-variant-numeric:tabular-nums;}
  :focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:2px;border-radius:8px;}
  .no-scrollbar{scrollbar-width:none;-ms-overflow-style:none;}
  .no-scrollbar::-webkit-scrollbar{display:none;}

  div.container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:16px;
    padding-right:16px;
  }
  @media (min-width:768px){
    div.container{padding-left:24px;padding-right:24px;}
  }
  @media (min-width:1440px){
    div.container{max-width:1280px;padding-left:32px;padding-right:32px;}
  }

  .top-bar{
    height:3px;
    background:linear-gradient(90deg,var(--brand-600) 0%,var(--brand-500) 58%,var(--accent) 100%);
  }

  /* ============ 头部 ============ */
  .site-header{
    background:#fff;
    border-bottom:1px solid var(--line);
    position:relative;
    z-index:30;
  }
  .brand-row{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:68px;
    padding:10px 0;
  }
  .brand{display:flex;align-items:center;gap:12px;min-width:0;}
  .brand-mark{
    width:40px;height:40px;flex-shrink:0;
    border-radius:12px;
    background:linear-gradient(140deg,var(--brand-500),var(--brand-700));
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 8px 18px -10px rgba(20,69,156,.7);
  }
  .brand-name{display:block;font-size:15px;font-weight:700;color:var(--ink);line-height:1.28;}
  .brand-sub{display:block;font-size:12px;color:var(--ink-2);line-height:1.45;}
  .header-meta{display:none;align-items:center;gap:24px;font-size:13px;color:var(--ink-2);}
  .meta-item{display:inline-flex;align-items:center;gap:6px;}
  .header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .icon-btn{
    width:40px;height:40px;border-radius:10px;
    border:1px solid var(--line);background:#fff;color:var(--ink-2);
    display:inline-flex;align-items:center;justify-content:center;
    transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  }
  .icon-btn:hover{background:var(--brand-50);color:var(--brand-600);border-color:var(--brand-300);}
  .hamburger{display:inline-flex;}
  @media (min-width:1024px){
    .header-meta{display:flex;}
    .hamburger{display:none;}
  }
  @media (max-width:1023px){
    .header-actions .btn-secondary,
    .header-actions .icon-btn:not(.hamburger){display:none;}
  }
  @media (max-width:520px){
    .brand-name{font-size:13.5px;}
    .brand-sub{display:none;}
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    transition:transform .2s ease-out,background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,color .2s ease-out;
  }
  .btn-primary{
    background:var(--brand-600);color:#fff;
    box-shadow:0 10px 22px -12px rgba(27,90,201,.9);
  }
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 16px 30px -14px rgba(20,69,156,.85);}
  .btn-primary:active{transform:translateY(0);filter:brightness(.96);}
  .btn-secondary{
    background:#fff;color:var(--brand-600);border:1px solid var(--line);
  }
  .btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-500);transform:translateY(-1px);}
  .btn-secondary:active{transform:translateY(0);}
  .btn-light{
    background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.42);
  }
  .btn-light:hover{background:rgba(255,255,255,.26);transform:translateY(-1px);}
  .btn-lg{height:48px;padding:0 24px;}

  /* ============ 频道导航 ============ */
  .site-nav{
    position:sticky;top:0;z-index:40;
    background:var(--bg);
    border-bottom:1px solid var(--line);
    transition:background .25s ease-out,box-shadow .25s ease-out;
  }
  .site-nav.is-stuck{
    background:rgba(255,255,255,.86);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    box-shadow:0 10px 26px -22px rgba(14,24,38,.75);
  }
  .nav-inner{position:relative;}
  .nav-list{
    display:flex;align-items:center;gap:8px;
    height:52px;overflow-x:auto;overflow-y:hidden;
  }
  .nav-list > li{flex-shrink:0;display:flex;align-items:center;}
  .nav-link{
    position:relative;
    display:inline-flex;align-items:center;height:36px;padding:0 14px;
    border-radius:999px;font-size:15px;font-weight:600;color:var(--ink-2);
    white-space:nowrap;
    transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-link:hover{background:var(--brand-50);color:var(--brand-600);}
  .nav-link.active{background:var(--brand-50);color:var(--brand-600);}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:4px;height:3px;
    border-radius:3px;background:var(--brand-600);
  }
  .nav-fade{
    position:absolute;top:0;right:0;width:52px;height:100%;
    background:linear-gradient(90deg,rgba(246,249,253,0),var(--bg));
    pointer-events:none;
  }

  /* ============ 分类页首屏 ============ */
  .hero-sm{
    position:relative;overflow:hidden;background:var(--brand-900);isolation:isolate;
  }
  .hero-sm-bg{
    position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.52;
  }
  .hero-sm-overlay{
    position:absolute;inset:0;
    background:linear-gradient(105deg,rgba(11,42,99,.95) 0%,rgba(11,42,99,.8) 48%,rgba(20,69,156,.62) 100%);
  }
  .hero-sm::after{
    content:"";position:absolute;right:-70px;bottom:-70px;width:300px;height:300px;
    background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.16) 0 1px,transparent 1px 12px);
    opacity:.28;pointer-events:none;
  }
  .hero-sm-inner{position:relative;z-index:2;padding-top:52px;padding-bottom:56px;}
  @media (min-width:1024px){
    .hero-sm-inner{padding-top:68px;padding-bottom:72px;}
  }
  .hero-sm-text{max-width:820px;}
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:rgba(255,255,255,.72);margin-bottom:20px;
  }
  .breadcrumb a:hover{color:#fff;}
  .breadcrumb .sep{opacity:.5;}
  .breadcrumb .current{color:#fff;}
  .hero-badge{
    display:inline-flex;align-items:center;gap:7px;
    font-size:12px;font-weight:600;line-height:1;padding:7px 13px;border-radius:999px;
    background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#fff;
  }
  .hero-sm h1{
    color:#fff;font-size:clamp(28px,4.4vw,42px);line-height:1.28;
    margin-top:18px;letter-spacing:-.01em;
  }
  .hero-sub{
    color:rgba(255,255,255,.86);font-size:16px;line-height:1.85;
    margin-top:16px;max-width:730px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
  .hero-trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
  .trust-pill{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;color:rgba(255,255,255,.92);
    background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
    border-radius:999px;padding:7px 14px;
  }
  .trust-pill svg{color:rgba(255,255,255,.85);flex-shrink:0;}

  /* ============ 锚点条 ============ */
  .anchor-bar{
    position:sticky;top:52px;z-index:29;
    background:rgba(255,255,255,.94);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .anchor-inner{
    display:flex;align-items:center;gap:8px;height:56px;
    overflow-x:auto;overflow-y:hidden;
  }
  .anchor-label{
    flex-shrink:0;font-size:12px;font-weight:700;letter-spacing:.12em;
    color:var(--ink-2);margin-right:4px;
  }
  .anchor-link{
    flex-shrink:0;display:inline-flex;align-items:center;height:34px;padding:0 14px;
    border-radius:999px;border:1px solid transparent;
    font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap;
    transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out;
  }
  .anchor-link:hover{color:var(--brand-600);background:var(--brand-50);border-color:var(--brand-100);}

  /* ============ 板块 ============ */
  .section{padding:56px 0;}
  @media (min-width:1024px){
    .section{padding:88px 0;}
  }
  .section-alt{
    background:#fff;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .section-head{max-width:740px;margin-bottom:32px;}
  @media (min-width:1024px){
    .section-head{margin-bottom:40px;}
  }
  .section-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand-600);
    margin-bottom:12px;
  }
  .section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.35;}
  .section-head p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--ink-2);}

  /* ============ 卡片网格 ============ */
  .grid-2{display:grid;grid-template-columns:1fr;gap:20px;}
  @media (min-width:768px){
    .grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
  }
  .grid-3{display:grid;grid-template-columns:1fr;gap:18px;}
  @media (min-width:768px){
    .grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
  }

  .feature-card{
    display:flex;flex-direction:column;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
  .feature-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);}
  .feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease-out;}
  .feature-card:hover .feature-media img{transform:scale(1.03);}
  .feature-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,42,99,0) 48%,rgba(11,42,99,.42) 100%);
  }
  .feature-body{
    display:flex;flex-direction:column;gap:12px;
    padding:22px;flex:1;
  }
  @media (min-width:768px){
    .feature-body{padding:26px;}
  }
  .feature-body h3{font-size:20px;line-height:1.5;transition:color .2s ease-out;}
  .feature-card:hover .feature-body h3{color:var(--brand-600);}
  .feature-body p{font-size:15px;line-height:1.85;}

  .badge{
    align-self:flex-start;
    display:inline-flex;align-items:center;
    font-size:12px;font-weight:600;line-height:1;padding:5px 11px;
    border-radius:999px;background:var(--brand-50);color:var(--brand-600);
  }

  .check-list{display:grid;gap:8px;}
  .check-list li{display:flex;gap:9px;font-size:14px;line-height:1.7;color:var(--ink-2);}
  .check-list svg{flex-shrink:0;margin-top:5px;color:var(--brand-500);}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;width:fit-content;
    margin-top:auto;padding-top:6px;
    font-size:14px;font-weight:600;color:var(--brand-600);
    text-decoration:underline;text-decoration-thickness:1px;
    text-underline-offset:4px;text-decoration-color:rgba(27,90,201,.35);
    transition:color .2s ease-out,text-decoration-color .2s ease-out;
  }
  .text-link:hover{color:var(--brand-700);text-decoration-color:var(--accent);}
  .text-link svg{transition:transform .2s ease-out;}
  .text-link:hover svg{transform:translateX(3px);}

  /* ============ 检查项 ============ */
  .info-tile{
    background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px;
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .info-tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
  .info-icon{
    width:38px;height:38px;border-radius:12px;
    background:var(--brand-50);color:var(--brand-600);
    display:flex;align-items:center;justify-content:center;margin-bottom:14px;
  }
  .info-tile h3{font-size:17px;line-height:1.6;}
  .info-tile p{margin-top:8px;font-size:14px;line-height:1.8;}

  /* ============ 底部 CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    background:var(--brand-900);border-radius:20px;
    padding:40px 24px 42px;
    box-shadow:0 28px 52px -32px rgba(11,42,99,.75);
  }
  @media (min-width:768px){
    .cta-band{padding:52px 48px 54px;}
  }
  .cta-band::before{
    content:"";position:absolute;left:0;top:28px;bottom:28px;width:3px;
    border-radius:0 3px 3px 0;background:var(--accent);
  }
  .cta-band::after{
    content:"";position:absolute;right:-50px;top:-50px;width:250px;height:250px;
    background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.09) 0 1px,transparent 1px 11px);
    opacity:.55;pointer-events:none;
  }
  .cta-band > *{position:relative;z-index:2;}
  .cta-band h2{color:#fff;font-size:clamp(20px,2.6vw,28px);line-height:1.4;}
  .cta-band p{color:rgba(255,255,255,.82);margin-top:14px;max-width:640px;font-size:15px;line-height:1.85;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
  .cta-note{
    display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;
    font-size:13px;color:rgba(255,255,255,.72);
  }
  .cta-note span{display:inline-flex;align-items:center;gap:6px;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--bg);border-top:1px solid var(--line);
    padding:56px 0 28px;
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
  @media (min-width:768px){
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}
  }
  @media (min-width:1024px){
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.15fr;gap:40px;}
  }
  .footer-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px;}
  .footer-link{display:block;font-size:14px;color:var(--ink-2);padding:5px 0;}
  .footer-link:hover{color:var(--brand-600);}
  .footer-bottom{
    margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;color:var(--ink-2);
  }

  /* ============ 移动端抽屉 ============ */
  .drawer-mask{
    position:fixed;inset:0;z-index:60;
    background:rgba(11,42,99,.5);
    opacity:0;visibility:hidden;
    transition:opacity .25s ease-out,visibility .25s ease-out;
  }
  .drawer-mask.open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:70;
    width:280px;max-width:86vw;background:#fff;
    transform:translateX(100%);
    transition:transform .28s ease-out;
    padding:20px 18px 28px;overflow-y:auto;
    box-shadow:-24px 0 48px -28px rgba(11,42,99,.6);
  }
  .drawer.open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
  .drawer-title{font-size:15px;font-weight:700;color:var(--ink);}
  .drawer-link{
    display:block;padding:13px 12px;border-radius:10px;
    font-size:15px;font-weight:600;color:var(--ink-2);
    transition:background .2s ease-out,color .2s ease-out;
  }
  .drawer-link:hover{background:var(--brand-50);color:var(--brand-600);}
  .drawer-link.active{background:var(--brand-50);color:var(--brand-600);}
  .drawer-cta{margin-top:18px;display:grid;gap:10px;}
  @media (min-width:1024px){
    .drawer,.drawer-mask{display:none;}
  }

/* roulang page: category2 */
:root{
  --brand-50:#EEF4FF; --brand-100:#DCE8FB; --brand-300:#8FB4EE; --brand-500:#2B6FE3;
  --brand-600:#1B5AC9; --brand-700:#14459C; --brand-900:#0B2A63;
  --accent:#FF7A2F; --accent-soft:#FFF1E6;
  --ink:#0E1826; --ink-2:#46586E; --line:#E3EAF3; --bg:#F6F9FD; --surface:#FFFFFF;
  --radius-card:16px; --radius-btn:10px; --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
  --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
  --gap:24px;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.85;color:var(--ink-2);
  background:var(--bg);
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-0.01em;}
p{margin:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
ul{margin:0;padding:0;list-style:none;}
meta{display:none;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1280px){.container{max-width:1280px;padding:0 32px;}}
.no-scrollbar{-ms-overflow-style:none;scrollbar-width:none;}
.no-scrollbar::-webkit-scrollbar{display:none;}

/* 顶部细条 */
.topbar{height:3px;background:linear-gradient(90deg,var(--brand-600),var(--brand-300) 45%,var(--accent));}

/* Header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-900));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px -8px rgba(20,69,156,.6);
}
.brand-name{display:block;font-size:16px;font-weight:700;color:var(--ink);line-height:1.35;}
.brand-sub{display:block;font-size:12px;color:var(--ink-2);line-height:1.4;}
.header-meta{display:none;gap:22px;align-items:center;}
@media (min-width:1024px){.header-meta{display:flex;}}
.meta-item{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-2);}
.header-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:38px;height:38px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .2s ease-out;
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-300);background:var(--brand-50);}
.icon-btn:focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:2px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--radius-btn);font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out, border-color .2s ease-out, color .2s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px -10px rgba(27,90,201,.75);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(20,69,156,.85);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-secondary{background:var(--surface);color:var(--brand-600);border-color:var(--line);}
.btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-500);}
.btn-secondary:active{background:var(--brand-100);}
.btn:focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:2px;}
.btn-lg{height:48px;padding:0 22px;font-size:15px;}
.hamburger{display:inline-flex;}
@media (min-width:1024px){.hamburger{display:none;}}
.header-actions .btn-secondary{display:none;}
@media (min-width:1024px){.header-actions .btn-secondary{display:inline-flex;}}

/* Nav 频道行 */
.site-nav{
  position:sticky;top:0;z-index:40;background:var(--bg);border-bottom:1px solid var(--line);
  transition:background .2s ease-out, box-shadow .2s ease-out;
}
.site-nav.is-stuck{background:rgba(255,255,255,.86);backdrop-filter:blur(8px);box-shadow:0 6px 18px -14px rgba(14,24,38,.4);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px;}
.nav-scroll{display:flex;align-items:center;gap:6px;overflow-x:auto;padding:6px 0;flex:1;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
  padding:7px 14px;border-radius:var(--radius-pill);font-size:14px;font-weight:600;color:var(--ink-2);
  transition:background .2s ease-out, color .2s ease-out;
}
.nav-link:hover{background:var(--brand-50);color:var(--brand-600);}
.nav-link.active{background:var(--brand-50);color:var(--brand-600);}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);
  width:22px;height:3px;border-radius:3px;background:var(--brand-600);
}
.nav-link:focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:2px;}
.nav-cta{display:none;font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap;}
.nav-cta:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--accent);}
@media (min-width:1024px){.nav-cta{display:inline-flex;}}
.nav-fade{display:none;}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,42,99,.5);opacity:0;visibility:hidden;
  transition:opacity .24s ease-out, visibility .24s;z-index:60;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:86vw;background:var(--surface);
  z-index:61;transform:translateX(100%);transition:transform .24s ease-out;
  padding:20px;overflow-y:auto;box-shadow:-14px 0 40px -24px rgba(11,42,99,.6);
}
.drawer.open{transform:translateX(0);}
.drawer-title{font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:10px;}
.drawer-link{
  display:block;padding:11px 12px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;color:var(--ink);
  transition:background .2s ease-out,color .2s ease-out;
}
.drawer-link:hover{background:var(--brand-50);color:var(--brand-600);}
.drawer-link.active{background:var(--brand-50);color:var(--brand-600);}
.drawer .btn{width:100%;margin-top:14px;}

/* 面包屑 */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs .sep{color:#A9B7C9;}
.crumbs .current{color:var(--ink);font-weight:600;}

/* Hero */
.page-hero{
  position:relative;overflow:hidden;border-radius:20px;margin-top:24px;
  background-image:linear-gradient(115deg, rgba(11,42,99,.86), rgba(27,90,201,.62)), url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  padding:40px 24px;
}
@media (min-width:768px){.page-hero{padding:56px 48px;}}
.page-hero .hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.16);color:#EAF1FF;font-size:12px;font-weight:600;letter-spacing:.02em;
}
.page-hero h1{color:#fff;font-size:clamp(28px,4.6vw,44px);line-height:1.25;margin:18px 0 14px;}
.page-hero .hero-sub{color:rgba(255,255,255,.86);font-size:16px;line-height:1.85;max-width:660px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.page-hero .btn-secondary{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4);}
.page-hero .btn-secondary:hover{background:rgba(255,255,255,.24);border-color:#fff;}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:rgba(255,255,255,.9);}

/* 板块 */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.35;}
.section-head p{font-size:15px;color:var(--ink-2);margin-top:8px;max-width:720px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);}
.text-link svg{transition:transform .2s ease-out;}
.text-link:hover svg{transform:translateX(2px);}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--accent);}

/* 主体两栏 */
.layout{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){.layout{grid-template-columns:3fr 9fr;gap:28px;}}
.side-anchor{position:sticky;top:76px;}
.anchor-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:22px;}
.anchor-card h3{font-size:15px;margin-bottom:14px;}
.anchor-list{display:flex;flex-direction:column;gap:4px;}
.anchor-list a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-btn);
  font-size:14px;color:var(--ink-2);transition:background .2s ease-out,color .2s ease-out;
}
.anchor-list a:hover{background:var(--brand-50);color:var(--brand-600);}
.anchor-list a .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-300);flex:none;}
.anchor-list a:hover .dot{background:var(--accent);}
.anchor-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;line-height:1.8;color:var(--ink-2);}

/* 图文条目列表 */
.entry-list{display:flex;flex-direction:column;gap:20px;}
.entry{
  display:grid;grid-template-columns:1fr;gap:20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:22px;transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
}
@media (min-width:640px){.entry{grid-template-columns:200px 1fr;align-items:flex-start;}}
.entry:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
.entry:hover h3{color:var(--brand-600);}
.entry figure{margin:0;border-radius:12px;overflow:hidden;background:var(--brand-50);}
.entry figure img{width:100%;height:100%;aspect-ratio:200/140;object-fit:cover;}
.entry h3{font-size:18px;line-height:1.5;margin-bottom:10px;transition:color .2s ease-out;}
.entry p{font-size:15px;line-height:1.8;color:var(--ink-2);}
.entry-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:14px;}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:600;line-height:1.4;
}
.tag-accent{background:var(--accent-soft);color:#C0521A;}
.entry-foot{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);}

/* 分页 */
.pager{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:28px;}
.pager-item{
  min-width:36px;height:36px;padding:0 10px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.pager-item:hover{background:var(--brand-50);color:var(--brand-600);border-color:var(--brand-300);}
.pager-item.current{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}

/* 数据带 */
.stats{background:var(--brand-900);color:#fff;border-radius:20px;padding:36px 24px;position:relative;overflow:hidden;}
.stats::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),rgba(255,122,47,.15));
}
@media (min-width:768px){.stats{padding:44px 48px;}}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
@media (min-width:1024px){.stats-grid{grid-template-columns:repeat(4,1fr);}}
.stat-num{font-size:clamp(28px,4vw,40px);line-height:1.1;font-weight:700;color:#fff;font-variant-numeric:tabular-nums;}
.stat-num em{color:var(--accent);font-style:normal;}
.stat-label{font-size:14px;color:rgba(255,255,255,.78);margin-top:8px;}

/* 通用卡片 */
.grid-3{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:768px){.grid-3{grid-template-columns:repeat(3,1fr);}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:26px;transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
.card:hover h3{color:var(--brand-600);}
.card h3{font-size:20px;line-height:1.5;margin-bottom:10px;transition:color .2s ease-out;}
.card p{font-size:15px;}
.icon-round{
  width:40px;height:40px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;
  background:var(--brand-600);color:#fff;font-size:13px;font-weight:700;margin-bottom:14px;
}
.check-list{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.check-list li{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--ink-2);}
.check-list li svg{flex:none;margin-top:5px;color:var(--brand-500);}

/* FAQ */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;}
.faq details{border-bottom:1px solid var(--line);}
.faq details:last-child{border-bottom:none;}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;transition:color .2s ease-out,background .2s ease-out;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--brand-600);background:var(--brand-50);}
.faq summary:focus-visible{outline:3px solid rgba(43,111,227,.25);outline-offset:-3px;}
.faq summary .chev{flex:none;color:var(--brand-600);transition:transform .2s ease-out;}
.faq details[open] summary .chev{transform:rotate(180deg);}
.faq .answer{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}

/* CTA 带 */
.cta-band{
  background:linear-gradient(120deg,var(--brand-700),var(--brand-500));
  border-radius:20px;padding:36px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
}
@media (min-width:768px){.cta-band{padding:44px 48px;}}
.cta-band h2{color:#fff;font-size:clamp(20px,2.6vw,28px);line-height:1.4;}
.cta-band p{color:rgba(255,255,255,.85);font-size:15px;margin-top:10px;max-width:640px;}
.cta-band .btn-secondary{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.42);}
.cta-band .btn-secondary:hover{background:rgba(255,255,255,.24);border-color:#fff;}

/* Footer */
.site-footer{background:var(--bg);border-top:1px solid var(--line);margin-top:56px;padding:48px 0 28px;}
.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 1.2fr;}}
.footer-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.footer-link{display:block;font-size:14px;color:var(--ink-2);padding:5px 0;transition:color .2s ease-out;}
.footer-link:hover{color:var(--brand-600);}
.footer-bottom{
  margin-top:32px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:var(--ink-2);
}

/* 弹层 */
.modal-mask{
  position:fixed;inset:0;background:rgba(11,42,99,.5);z-index:80;display:flex;align-items:center;justify-content:center;
  padding:16px;opacity:0;visibility:hidden;transition:opacity .22s ease-out, visibility .22s;
}
.modal-mask.open{opacity:1;visibility:visible;}
.modal-card{
  width:100%;max-width:440px;background:var(--surface);border-radius:18px;padding:28px;position:relative;
  box-shadow:0 30px 70px -30px rgba(11,42,99,.7);
}
.modal-card h3{font-size:20px;margin-bottom:8px;}
.modal-card p.hint{font-size:14px;color:var(--ink-2);margin-bottom:18px;}
.modal-close{
  position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  transition:background .2s ease-out,color .2s ease-out;
}
.modal-close:hover{background:var(--brand-50);color:var(--brand-600);}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
.field label{font-size:14px;font-weight:600;color:var(--ink);}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;font-size:14px;font-family:inherit;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-btn);transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.field textarea{resize:vertical;min-height:92px;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,111,227,.15);
}
.form-note{font-size:13px;color:var(--ink-2);margin-top:12px;}
.form-msg{font-size:13px;color:var(--brand-600);margin-top:10px;display:none;}
.form-msg.show{display:block;}

@media (max-width:519px){
  .page-hero{padding:32px 18px;border-radius:16px;}
  .entry{padding:18px;}
  .card{padding:20px;}
  .brand-sub{display:none;}
}

/* roulang page: category3 */
:root{
  --brand-50:#EEF4FF; --brand-100:#DCE8FB; --brand-300:#8FB4EE; --brand-500:#2B6FE3;
  --brand-600:#1B5AC9; --brand-700:#14459C; --brand-900:#0B2A63;
  --accent:#FF7A2F; --accent-soft:#FFF1E6;
  --ink:#0E1826; --ink-2:#46586E; --line:#E3EAF3; --bg:#F6F9FD; --surface:#FFFFFF;
  --radius-card:16px; --radius-btn:10px; --radius-img:14px;
  --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
  --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; padding:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px; line-height:1.85; color:var(--ink-2); background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block; border-style:none}
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}
table{border-collapse:collapse; width:100%}
:focus-visible{outline:3px solid rgba(43,111,227,.35); outline-offset:2px; border-radius:6px}

.top-bar{height:3px; background:linear-gradient(90deg,var(--brand-700),var(--brand-500) 55%,var(--accent))}

.container{max-width:1200px; margin:0 auto; padding:0 16px; position:relative}
@media (min-width:768px){ .container{padding:0 24px} }
@media (min-width:1280px){ .container{max-width:1280px; padding:0 32px} }

/* ---------- Header ---------- */
.site-header{background:var(--surface); border-bottom:1px solid var(--line)}
.brand-row{display:flex; align-items:center; justify-content:space-between; gap:16px; min-height:64px; padding:10px 0}
.brand{display:inline-flex; align-items:center; gap:10px; min-width:0}
.brand-mark{
  width:38px; height:38px; flex:0 0 38px; border-radius:11px;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-500));
  display:inline-flex; align-items:center; justify-content:center;
  box-shadow:0 6px 16px -8px rgba(27,90,201,.9);
}
.brand-name{display:block; font-size:16px; font-weight:700; color:var(--ink); line-height:1.25; letter-spacing:-.01em}
.brand-sub{display:block; font-size:12px; color:var(--ink-2); line-height:1.4; margin-top:1px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.header-meta{display:flex; align-items:center; gap:22px; font-size:13px; color:var(--ink-2)}
.meta-item{display:inline-flex; align-items:center; gap:6px; white-space:nowrap}
.meta-item svg{color:var(--brand-500)}
@media (max-width:1023px){ .header-meta{display:none} }
.header-actions{display:flex; align-items:center; gap:10px}
@media (max-width:1023px){ .header-actions .btn-secondary{display:none} }

.icon-btn{
  width:40px; height:40px; border-radius:10px; border:1px solid var(--line); background:var(--surface);
  color:var(--ink-2); display:inline-flex; align-items:center; justify-content:center; cursor:pointer;
  transition:background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.icon-btn:hover{background:var(--brand-50); color:var(--brand-600); border-color:var(--brand-100)}
.hamburger{display:none}
@media (max-width:1023px){ .hamburger{display:inline-flex} }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:44px; padding:0 18px; border-radius:var(--radius-btn);
  font-size:14px; font-weight:600; line-height:1; cursor:pointer; border:1px solid transparent;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand-600); color:#fff; box-shadow:0 8px 18px -12px rgba(27,90,201,.95)}
.btn-primary:hover{background:var(--brand-700); transform:translateY(-1px); box-shadow:0 14px 26px -14px rgba(20,69,156,.95)}
.btn-primary:active{transform:translateY(0); filter:brightness(.96)}
.btn-secondary{background:var(--surface); color:var(--brand-600); border-color:var(--line)}
.btn-secondary:hover{background:var(--brand-50); border-color:var(--brand-500)}
.btn-lg{height:48px; padding:0 22px}
.btn-light{background:#fff; color:var(--brand-700); box-shadow:0 10px 24px -14px rgba(0,0,0,.6)}
.btn-light:hover{background:var(--brand-50); transform:translateY(-1px)}
.btn-ghost-light{background:rgba(255,255,255,.08); color:#fff; border-color:rgba(255,255,255,.55)}
.btn-ghost-light:hover{background:rgba(255,255,255,.18)}

/* ---------- Channel nav ---------- */
.channel-nav{
  position:sticky; top:0; z-index:40; background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:background-color .25s var(--ease), box-shadow .25s var(--ease);
}
.channel-nav.is-stuck{background:rgba(255,255,255,.86); backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px); box-shadow:0 10px 26px -22px rgba(11,42,99,.7)}
.nav-inner{display:flex; align-items:center; gap:10px; height:52px; overflow-x:auto; scroll-snap-type:x proximity}
@media (min-width:768px){ .nav-inner{gap:18px} }
.no-scrollbar::-webkit-scrollbar{display:none}
.no-scrollbar{scrollbar-width:none; -ms-overflow-style:none}
.nav-link{
  position:relative; flex:0 0 auto; padding:6px 13px; border-radius:999px;
  font-size:14px; color:var(--ink-2); line-height:24px; white-space:nowrap;
  transition:background-color .2s var(--ease), color .2s var(--ease);
}
.nav-link:hover{background:var(--brand-50); color:var(--brand-600)}
.nav-link.active{background:var(--brand-50); color:var(--brand-600); font-weight:600}
.nav-link.active::after{content:""; position:absolute; left:14px; right:14px; bottom:1px; height:3px; border-radius:3px; background:var(--brand-600)}
.nav-fade{
  position:absolute; right:16px; top:0; height:52px; width:44px; pointer-events:none;
  background:linear-gradient(90deg, rgba(246,249,253,0), var(--bg) 70%);
}
@media (min-width:768px){ .nav-fade{right:24px} }
@media (min-width:1280px){ .nav-fade{right:32px} }

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;
  background-image:linear-gradient(115deg, rgba(11,42,99,.88), rgba(20,69,156,.72) 60%, rgba(11,42,99,.82)), url('/assets/images/backpic/back-2.png');
  background-size:cover; background-position:center;
  color:#fff; padding:44px 0 52px;
}
@media (min-width:768px){ .cat-hero{padding:60px 0 68px} }
.cat-hero::after{
  content:""; position:absolute; right:0; bottom:0; width:280px; height:150px; pointer-events:none;
  background:repeating-linear-gradient(45deg, rgba(255,255,255,.07) 0 1px, transparent 1px 12px);
  opacity:.9;
}
.breadcrumb{display:flex; flex-wrap:wrap; align-items:center; gap:8px; font-size:13px; color:rgba(255,255,255,.72); margin-bottom:18px}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:#fff; font-weight:600}
.eyebrow{
  display:inline-flex; align-items:center; gap:7px; padding:5px 12px; border-radius:999px;
  background:rgba(255,255,255,.15); color:#fff; font-size:12px; font-weight:600; letter-spacing:.02em;
}
.cat-hero h1{
  margin-top:18px; font-size:clamp(28px,4.6vw,44px); line-height:1.25; font-weight:700;
  letter-spacing:-.01em; color:#fff; max-width:900px;
}
.hero-lede{margin-top:18px; font-size:16px; line-height:1.85; color:rgba(255,255,255,.87); max-width:790px}
.hero-cta{display:flex; flex-wrap:wrap; gap:12px; margin-top:28px}
.hero-facts{display:flex; flex-wrap:wrap; gap:10px 22px; margin-top:26px; font-size:13px; color:rgba(255,255,255,.8)}
.hero-facts span{display:inline-flex; align-items:center; gap:6px}
.hero-facts svg{color:var(--accent)}

/* ---------- Sections ---------- */
.section{padding:56px 0}
@media (min-width:768px){ .section{padding:88px 0} }
.section--tight{padding-top:48px}
.section-head{max-width:760px; margin-bottom:28px}
@media (min-width:768px){ .section-head{margin-bottom:36px} }
.section-kicker{font-size:12px; font-weight:600; letter-spacing:.08em; color:var(--brand-600); text-transform:uppercase}
.section-head h2{margin-top:10px; font-size:clamp(22px,3vw,32px); line-height:1.35; font-weight:700; color:var(--ink); letter-spacing:-.01em}
.section-head p{margin-top:14px; font-size:16px; line-height:1.85; color:var(--ink-2)}

/* ---------- Stats band ---------- */
.stats-band{background:var(--brand-900); color:#fff; padding:44px 0}
@media (min-width:768px){ .stats-band{padding:56px 0} }
.stats-kicker{font-size:12px; font-weight:600; letter-spacing:.1em; color:rgba(255,255,255,.62); margin-bottom:22px}
.stat-grid{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:22px 20px}
@media (min-width:768px){ .stat-grid{grid-template-columns:repeat(4,minmax(0,1fr)); gap:24px} }
.stat-item{border-left:2px solid rgba(255,255,255,.2); padding-left:16px}
.stat-item:first-child{border-left-color:var(--accent)}
.stat-num{font-size:clamp(24px,3.2vw,32px); font-weight:700; line-height:1.15; font-variant-numeric:tabular-nums; color:#fff; letter-spacing:-.01em}
.stat-label{margin-top:8px; font-size:14px; color:rgba(255,255,255,.72); line-height:1.6}

/* ---------- Table ---------- */
.table-card{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-card); box-shadow:var(--shadow-card); overflow:hidden}
.table-tools{display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px; padding:20px 22px; border-bottom:1px solid var(--line)}
.table-tools h3{font-size:17px; font-weight:600; color:var(--ink)}
.table-tools span{font-size:13px; color:var(--ink-2); display:inline-flex; align-items:center; gap:6px}
.table-scroll{overflow-x:auto}
.table-scroll table{min-width:840px; font-size:14px}
.table-scroll thead th{
  background:var(--brand-50); color:var(--brand-700); font-size:13px; font-weight:600;
  text-align:left; padding:14px 20px; white-space:nowrap; border-bottom:1px solid var(--line);
}
.table-scroll tbody td{padding:16px 20px; border-bottom:1px solid var(--line); color:var(--ink-2); vertical-align:top; line-height:1.75}
.table-scroll tbody tr:last-child td{border-bottom:0}
.table-scroll tbody tr:nth-child(even){background:#FAFCFF}
.table-scroll tbody th{
  text-align:left; font-weight:600; color:var(--ink); padding:16px 20px; border-bottom:1px solid var(--line);
  background:transparent; font-size:14px; line-height:1.7; min-width:180px;
}
.pill{display:inline-block; padding:4px 10px; border-radius:999px; font-size:12px; font-weight:600; line-height:1.4; white-space:nowrap}
.pill--self{background:var(--brand-50); color:var(--brand-600)}
.pill--mix{background:var(--accent-soft); color:#B94706}
.pill--human{background:#EAF7F0; color:#1B7A4C}

/* ---------- Cards 5/4/3 ---------- */
.grid-cards{display:grid; grid-template-columns:1fr; gap:22px}
@media (min-width:768px){ .grid-cards{grid-template-columns:repeat(12,minmax(0,1fr)); gap:24px} .span-5{grid-column:span 5} .span-4{grid-column:span 4} .span-3{grid-column:span 3} }
@media (min-width:768px) and (max-width:1023px){ .span-5,.span-4,.span-3{grid-column:span 6} }
.card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-card);
  box-shadow:var(--shadow-card); overflow:hidden; display:flex; flex-direction:column;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px); box-shadow:var(--shadow-hover); border-color:var(--brand-100)}
.card-media{aspect-ratio:16/9; overflow:hidden; background:var(--brand-50)}
.card-media img{width:100%; height:100%; object-fit:cover}
.card-body{padding:24px; display:flex; flex-direction:column; gap:14px; flex:1}
.card-body h3{font-size:19px; font-weight:600; color:var(--ink); line-height:1.5}
.card:hover .card-title-link{color:var(--brand-600)}
.card-body p{font-size:15px; line-height:1.8; color:var(--ink-2)}
.card-icon{
  width:42px; height:42px; border-radius:12px; background:var(--brand-50); color:var(--brand-600);
  display:inline-flex; align-items:center; justify-content:center;
}
.check-list{display:flex; flex-direction:column; gap:9px; margin-top:2px}
.check-list li{display:flex; align-items:flex-start; gap:8px; font-size:14px; color:var(--ink-2); line-height:1.65}
.check-list svg{flex:0 0 16px; margin-top:4px; color:var(--brand-500)}
.card--soft{background:var(--brand-50); border-color:var(--brand-100)}
.card--soft .card-body h3{color:var(--brand-700)}
.text-link{
  display:inline-flex; align-items:center; gap:6px; font-size:14px; font-weight:600; color:var(--brand-600);
  text-decoration:underline; text-underline-offset:4px; text-decoration-thickness:1px; margin-top:auto;
  transition:color .2s var(--ease);
}
.text-link svg{transition:transform .2s var(--ease)}
.text-link:hover{color:var(--brand-700); text-decoration-color:var(--accent)}
.text-link:hover svg{transform:translateX(2px)}

/* ---------- FAQ ---------- */
.faq-list{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-card); box-shadow:var(--shadow-card); padding:6px 24px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%; background:none; border:0; padding:20px 0; cursor:pointer; text-align:left;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  font-size:16px; font-weight:600; color:var(--ink); line-height:1.6; transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-600)}
.faq-q .faq-mark{
  flex:0 0 26px; width:26px; height:26px; border-radius:50%; background:var(--brand-50); color:var(--brand-600);
  display:inline-flex; align-items:center; justify-content:center; transition:transform .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}
.faq-item.open .faq-mark{transform:rotate(180deg); background:var(--brand-600); color:#fff}
.faq-a{max-height:0; overflow:hidden; transition:max-height .28s var(--ease)}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{font-size:15px; line-height:1.85; color:var(--ink-2); padding:0 40px 20px 0}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#EEF4FF 0%, #FFFFFF 62%), var(--surface);
  border:1px solid var(--line); border-radius:20px; padding:32px 26px;
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:24px;
  box-shadow:var(--shadow-card);
}
@media (min-width:768px){ .cta-band{padding:40px 44px} }
.cta-band h2{font-size:clamp(20px,2.6vw,26px); font-weight:700; color:var(--ink); line-height:1.4}
.cta-band p{margin-top:10px; font-size:15px; line-height:1.8; color:var(--ink-2); max-width:620px}
.cta-actions{display:flex; flex-wrap:wrap; gap:12px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg); border-top:1px solid var(--line); margin-top:8px}
.footer-grid{display:grid; grid-template-columns:1fr; gap:30px; padding:48px 0 32px}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr)); gap:32px} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr; padding:56px 0 32px} }
.footer-title{font-size:14px; font-weight:600; color:var(--brand-900); margin-bottom:14px}
.footer-link{display:block; font-size:14px; color:var(--ink-2); padding:5px 0; transition:color .2s var(--ease), transform .2s var(--ease)}
.footer-link:hover{color:var(--brand-600); transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid var(--line); padding:20px 0 32px; display:flex; flex-wrap:wrap;
  justify-content:space-between; gap:10px; font-size:13px; color:var(--ink-2);
}

/* ---------- Drawer ---------- */
.drawer{
  position:fixed; top:0; right:0; z-index:60; width:280px; max-width:86vw; height:100%;
  background:var(--surface); box-shadow:-18px 0 44px -24px rgba(11,42,99,.6);
  transform:translateX(100%); transition:transform .26s var(--ease);
  padding:20px; overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex; align-items:center; justify-content:space-between; gap:12px; padding-bottom:16px; border-bottom:1px solid var(--line)}
.drawer-title{font-size:15px; font-weight:700; color:var(--ink)}
.drawer-nav{display:flex; flex-direction:column; gap:4px; padding-top:16px}
.drawer-nav a{padding:11px 12px; border-radius:10px; font-size:15px; color:var(--ink-2); transition:background-color .2s var(--ease), color .2s var(--ease)}
.drawer-nav a:hover{background:var(--brand-50); color:var(--brand-600)}
.drawer-nav a.active{background:var(--brand-50); color:var(--brand-600); font-weight:600}
.drawer-actions{display:flex; flex-direction:column; gap:10px; margin-top:22px}
.overlay{position:fixed; inset:0; z-index:55; background:rgba(11,42,99,.5); opacity:0; pointer-events:none; transition:opacity .26s var(--ease)}
.overlay.show{opacity:1; pointer-events:auto}

/* roulang page: category4 */
:root{
  --brand-50:#EEF4FF;
  --brand-100:#DCE8FB;
  --brand-300:#8FB4EE;
  --brand-500:#2B6FE3;
  --brand-600:#1B5AC9;
  --brand-700:#14459C;
  --brand-900:#0B2A63;
  --accent:#FF7A2F;
  --accent-soft:#FFF1E6;
  --ink:#0E1826;
  --ink-2:#46586E;
  --line:#E3EAF3;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(14,24,38,.04), 0 8px 24px -12px rgba(20,69,156,.18);
  --shadow-hover:0 2px 6px rgba(14,24,38,.06), 0 18px 40px -16px rgba(20,69,156,.28);
  --font-sans:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-0.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:3px solid rgba(43,111,227,.35);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1280px){.container{max-width:1280px;padding:0 32px;}}

.top-line{height:3px;background:linear-gradient(90deg,var(--brand-500),var(--brand-300) 55%,var(--accent));}

.no-scrollbar::-webkit-scrollbar{display:none;}
.no-scrollbar{-ms-overflow-style:none;scrollbar-width:none;}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;padding:8px 0;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px -8px rgba(20,69,156,.7);
}
.brand-name{display:block;font-size:15px;font-weight:700;color:var(--ink);line-height:1.25;}
.brand-sub{display:block;font-size:12px;color:var(--ink-2);line-height:1.5;}
.header-meta{display:none;align-items:center;gap:22px;}
@media (min-width:1024px){.header-meta{display:flex;}}
.meta-item{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-2);}
.header-actions{display:flex;align-items:center;gap:10px;}
.header-actions .btn{display:none;}
@media (min-width:768px){.header-actions .btn{display:inline-flex;}}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .2s ease-out;
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-300);background:var(--brand-50);}
@media (min-width:1024px){.hamburger{display:none;}}

/* ---------- nav ---------- */
.nav-bar{
  position:sticky;top:0;z-index:40;background:var(--bg);border-bottom:1px solid var(--line);
  transition:background .25s ease, box-shadow .25s ease;
}
.nav-bar.is-stuck{background:rgba(255,255,255,.88);backdrop-filter:blur(8px);box-shadow:0 8px 24px -20px rgba(11,42,99,.6);}
.channel-list{display:flex;align-items:stretch;gap:28px;overflow-x:auto;position:relative;}
.channel{
  position:relative;display:inline-flex;align-items:center;height:52px;padding:0 12px;
  font-size:14px;color:var(--ink-2);white-space:nowrap;transition:color .2s ease-out;
}
.channel::before{
  content:'';position:absolute;left:0;right:0;top:8px;bottom:8px;border-radius:999px;
  background:transparent;transition:background .2s ease-out;
}
.channel>span{position:relative;z-index:1;display:inline-flex;align-items:center;gap:7px;}
.channel:hover{color:var(--brand-600);}
.channel:hover::before{background:var(--brand-50);}
.channel.active{color:var(--brand-600);font-weight:600;}
.channel.active::before{background:var(--brand-50);}
.channel.active::after{
  content:'';position:absolute;left:50%;bottom:4px;transform:translateX(-50%);
  width:20px;height:3px;border-radius:3px;background:var(--brand-600);
}
.nav-fade{
  position:absolute;right:0;top:0;bottom:0;width:40px;pointer-events:none;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.95));
}
.nav-inner{position:relative;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  white-space:nowrap;transition:all .2s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 14px 26px -14px rgba(20,69,156,.75);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--brand-600);}
.btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-500);}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);border-color:#fff;}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-block{width:100%;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
  border-bottom:1px solid rgba(43,111,227,.35);padding-bottom:2px;transition:all .2s ease-out;
}
.text-link:hover{border-bottom-color:var(--accent);}
.text-link svg{transition:transform .2s ease-out;}
.text-link:hover svg{transform:translateX(3px);}

/* ---------- shared blocks ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-tight{padding:44px 0;}
@media (min-width:1024px){.section-tight{padding:64px 0;}}
.section-label{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--brand-600);background:var(--brand-50);padding:5px 12px;border-radius:999px;
}
.section-title{font-size:clamp(22px,3vw,32px);line-height:1.35;margin-top:14px;}
.section-desc{margin-top:12px;font-size:15px;line-height:1.85;max-width:760px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- hero ---------- */
.hero-cat{
  position:relative;color:#fff;padding:52px 0 60px;overflow:hidden;
  background:#0B2A63 url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.hero-cat::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(11,42,99,.94) 0%,rgba(20,69,156,.80) 55%,rgba(11,42,99,.90) 100%);
}
.hero-inner{position:relative;z-index:1;}
.hero-cat::after{
  content:'';position:absolute;right:-40px;bottom:-60px;width:320px;height:320px;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.09) 0 1px,transparent 1px 14px);
  opacity:.5;pointer-events:none;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.75);}
.breadcrumb a{color:rgba(255,255,255,.85);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .current{color:#fff;}
.hero-title{font-size:clamp(28px,4.6vw,44px);line-height:1.25;color:#fff;margin-top:20px;max-width:860px;}
.hero-lead{margin-top:18px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.88);max-width:720px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:28px;}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.85);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:36px;}
.step{
  position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 24px;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.step::before{
  content:'';position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--brand-500),var(--brand-300));
}
.step:nth-child(4)::before{background:linear-gradient(90deg,var(--brand-500),var(--accent));}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.step-num{
  width:40px;height:40px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.step-now .step-num{background:var(--brand-600);color:#fff;}
.step h3{font-size:17px;line-height:1.5;margin-top:16px;}
.step p{margin-top:8px;font-size:14px;line-height:1.8;}
.step-tag{
  display:inline-block;margin-top:14px;font-size:12px;font-weight:600;color:var(--brand-600);
  background:var(--brand-50);border-radius:999px;padding:4px 10px;
}

/* ---------- feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px;}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.feature-body{padding:22px 24px 26px;}
.feature-body h3{font-size:17px;line-height:1.5;}
.feature-body p{margin-top:10px;font-size:14px;line-height:1.8;}
.chip{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand-600);
  background:var(--brand-50);border-radius:999px;padding:4px 10px;line-height:1.4;
}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;margin-top:32px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;padding:20px 0;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  text-align:left;font-size:16px;font-weight:600;line-height:1.6;color:var(--ink);
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--brand-600);}
.faq-icon{flex:0 0 auto;margin-top:3px;color:var(--brand-500);transition:transform .2s ease-out;}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease-out;}
.faq-a p{padding-bottom:20px;font-size:15px;line-height:1.85;}

/* ---------- form ---------- */
.form-wrap{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;margin-top:36px;}
.form-side p{margin-top:14px;font-size:15px;line-height:1.85;}
.check-list{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.check-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.8;}
.check-list svg{flex:0 0 auto;margin-top:5px;color:var(--brand-500);}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-card);
}
@media (min-width:768px){.form-card{padding:32px;}}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:10px;
  background:#fff;font-size:15px;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.75;resize:vertical;}
.field select{
  appearance:none;-webkit-appearance:none;padding-right:40px;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2346586E' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,111,227,.15);
}
.field-hint{font-size:13px;color:var(--ink-2);margin-top:8px;}
.form-note{font-size:13px;line-height:1.7;color:var(--ink-2);margin-top:14px;}
.form-tip{margin-top:14px;font-size:14px;font-weight:600;color:var(--brand-600);min-height:22px;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;padding:40px 32px;
  background:linear-gradient(135deg,var(--brand-900),var(--brand-700));
  color:#fff;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:0 24px 48px -30px rgba(11,42,99,.8);
}
@media (min-width:768px){.cta-band{padding:48px;}}
.cta-band::after{
  content:'';position:absolute;right:-30px;top:-40px;width:260px;height:260px;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.08) 0 1px,transparent 1px 13px);
  pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.6vw,28px);line-height:1.4;position:relative;z-index:1;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.85);font-size:15px;max-width:560px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}

/* ---------- footer ---------- */
.site-footer{background:var(--bg);border-top:1px solid var(--line);margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:52px 0 36px;}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.footer-link{display:block;font-size:14px;color:var(--ink-2);padding:6px 0;transition:color .2s ease-out;}
.footer-link:hover{color:var(--brand-600);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;justify-content:space-between;
  align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--ink-2);
}

/* ---------- drawer & modal ---------- */
.overlay{
  position:fixed;inset:0;background:rgba(11,42,99,.5);z-index:55;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.overlay.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;background:#fff;z-index:60;
  transform:translateX(100%);transition:transform .28s ease-out;padding:24px;overflow-y:auto;
  box-shadow:-20px 0 44px -22px rgba(11,42,99,.5);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink);}
.drawer-link{
  display:block;font-size:15px;color:var(--ink-2);padding:12px 10px;border-radius:10px;
  transition:all .2s ease-out;
}
.drawer-link:hover{background:var(--brand-50);color:var(--brand-600);}
.drawer-link.active{background:var(--brand-50);color:var(--brand-600);font-weight:600;}

.modal-mask{
  position:fixed;inset:0;background:rgba(11,42,99,.5);z-index:70;
  display:flex;align-items:center;justify-content:center;padding:16px;
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
}
.modal-mask.open{opacity:1;visibility:visible;}
.modal-box{
  width:100%;max-width:440px;background:#fff;border-radius:18px;padding:28px;
  box-shadow:0 40px 80px -40px rgba(11,42,99,.7);transform:translateY(10px);
  transition:transform .24s ease-out;max-height:92vh;overflow-y:auto;
}
.modal-mask.open .modal-box{transform:translateY(0);}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px;}
.modal-title{font-size:18px;font-weight:700;color:var(--ink);}
.modal-close{
  width:32px;height:32px;flex:0 0 32px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--ink-2);cursor:pointer;display:inline-flex;align-items:center;
  justify-content:center;transition:all .2s ease-out;
}
.modal-close:hover{background:var(--brand-50);color:var(--brand-600);border-color:var(--brand-300);}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .steps{grid-template-columns:1fr;gap:16px;}
  .step{display:grid;grid-template-columns:52px 1fr;column-gap:16px;align-items:start;padding:22px;}
  .step::before{top:0;bottom:0;left:0;right:auto;width:3px;height:auto;background:linear-gradient(180deg,var(--brand-500),var(--brand-300));}
  .step-num{grid-row:span 3;margin-top:2px;}
  .step h3{margin-top:0;}
  .step p{margin-top:6px;}
  .step-tag{margin-top:10px;grid-column:2;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .faq-grid{grid-template-columns:1fr;gap:0;}
  .form-wrap{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:639px){
  .feature-grid{grid-template-columns:1fr;gap:20px;}
  .cta-band{padding:32px 24px;}
  .cta-actions .btn{width:100%;}
  .hero-title{font-size:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}