/* roulang page: index */
:root{
    --brand-50:#EEF5FD;
    --brand-100:#D8E8F9;
    --brand-500:#1A73C7;
    --brand-600:#12589E;
    --brand-700:#0B3B62;
    --accent-500:#F2A03D;
    --accent-600:#D9862A;
    --teal-500:#17A2A2;
    --canvas:#F6F8FB;
    --card:#FFFFFF;
    --line:#E3E9F2;
    --ink-700:#1F2A37;
    --ink-500:#5B6B84;
    --ink-400:#8A97AB;
    --radius-card:16px;
    --radius-lg:20px;
    --radius-btn:10px;
    --radius-badge:999px;
    --shadow-1:0 6px 24px -10px rgba(16,42,72,.14);
    --shadow-2:0 16px 38px -14px rgba(16,42,72,.22);
    --shadow-3:0 20px 44px -16px rgba(16,42,72,.26);
    --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; scroll-padding-top:88px; -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    background:var(--canvas);
    color:var(--ink-700);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.85;
    letter-spacing:0;
    overflow-x:hidden;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button,input,select,textarea{ font-family:inherit; font-size:inherit; color:inherit; }
  button{ background:none; border:0; cursor:pointer; }
  h1,h2,h3,h4{ margin:0; font-weight:650; letter-spacing:-0.01em; line-height:1.35; }
  p{ margin:0; }
  ul{ margin:0; padding:0; list-style:none; }
  :focus-visible{ outline:2px solid var(--brand-500); outline-offset:2px; border-radius:6px; }

  .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:1024px){ .container{ padding-left:32px; padding-right:32px; } }

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

  /* 滚动条 */
  ::-webkit-scrollbar{ width:10px; height:10px; }
  ::-webkit-scrollbar-track{ background:#EDF1F7; }
  ::-webkit-scrollbar-thumb{ background:#C6D2E2; border-radius:999px; border:2px solid #EDF1F7; }
  ::-webkit-scrollbar-thumb:hover{ background:#9FB2CB; }

  /* 头部 */
  .site-header{
    position:sticky; top:0; z-index:60;
    background:rgba(255,255,255,.85);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .brand{ display:inline-flex; align-items:center; gap:10px; min-height:44px; }
  .brand-mark{
    width:34px; height:34px; border-radius:10px;
    background:var(--brand-500); color:#fff;
    display:inline-flex; align-items:center; justify-content:center;
    box-shadow:var(--shadow-1);
  }
  .brand-text{ font-weight:700; font-size:17px; color:var(--brand-700); letter-spacing:-0.01em; }
  .nav-main{ margin-left:8px; }
  .nav-link{
    position:relative; display:inline-flex; align-items:center; min-height:44px;
    padding:0 12px; font-size:15px; color:var(--ink-500);
    transition:color .2s ease-out;
  }
  .nav-link::after{
    content:""; position:absolute; left:12px; right:12px; bottom:10px; height:2px;
    background:var(--brand-500); transform:scaleX(0); transform-origin:left center;
    transition:transform .2s ease-out;
  }
  .nav-link:hover{ color:var(--brand-500); }
  .nav-link:hover::after{ transform:scaleX(1); }
  .nav-link.is-active{ color:var(--brand-700); font-weight:650; }
  .nav-link.is-active::after{ transform:scaleX(1); }

  .header-search{ position:relative; }
  .header-search input{
    width:200px; height:44px; border-radius:var(--radius-btn);
    border:1px solid var(--line); background:#fff;
    padding:0 14px 0 38px; font-size:14px;
    transition:border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .header-search input::placeholder{ color:var(--ink-400); }
  .header-search input:focus{ outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(26,115,199,.2); }
  .header-search svg{ position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--ink-400); }

  .menu-toggle{
    width:44px; height:44px; display:inline-flex; align-items:center; justify-content:center;
    border-radius:var(--radius-btn); border:1px solid var(--line); background:#fff; color:var(--ink-700);
  }
  .menu-toggle:hover{ background:#F1F5FB; }
  .mobile-drawer{
    display:none; border-top:1px solid var(--line); background:#fff;
    padding:14px 16px 20px;
  }
  .mobile-drawer.is-open{ display:block; }
  .mobile-drawer .nav-link{ display:flex; width:100%; padding-left:4px; }
  .mobile-drawer .nav-link::after{ display:none; }
  .mobile-drawer .nav-link.is-active{ background:var(--brand-50); border-radius:10px; padding-left:12px; }

  /* 按钮 */
  .btn{ display:inline-flex; align-items:center; justify-content:center; gap:8px; height:46px; padding:0 20px;
    border-radius:var(--radius-btn); font-size:15px; font-weight:600; letter-spacing:0;
    transition:background-color .2s ease-out, color .2s ease-out, border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
  }
  .btn-primary{ background:var(--brand-500); color:#fff; box-shadow:var(--shadow-1); }
  .btn-primary:hover{ background:var(--brand-600); box-shadow:var(--shadow-2); transform:translateY(-1px); }
  .btn-secondary{ background:#fff; color:var(--ink-700); border:1px solid var(--line); }
  .btn-secondary:hover{ background:#F1F5FB; border-color:var(--brand-200, #B6D3F0); }
  .btn-accent{ background:var(--accent-500); color:#fff; box-shadow:0 6px 20px -10px rgba(217,134,42,.6); }
  .btn-accent:hover{ background:var(--accent-600); transform:translateY(-1px); }
  .btn-ghost{ background:transparent; color:var(--ink-500); }
  .btn-ghost:hover{ background:#F1F5FB; color:var(--brand-600); }
  .btn:disabled,.btn[aria-disabled="true"]{ opacity:.55; pointer-events:none; }

  .text-link{ display:inline-flex; align-items:center; gap:6px; color:var(--brand-500); font-weight:600; font-size:15px; }
  .text-link:hover{ color:var(--brand-600); }
  .text-link svg{ transition:transform .2s ease-out; }
  .text-link:hover svg{ transform:translateX(3px); }

  /* 通用板块 */
  .section{ padding:56px 0; }
  @media (min-width:768px){ .section{ padding:80px 0; } }
  @media (min-width:1024px){ .section{ padding:96px 0; } }
  .sec-head{ display:flex; flex-wrap:wrap; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:28px; }
  .sec-title{ font-size:clamp(22px,2.4vw,32px); color:var(--brand-700); }
  .sec-sub{ color:var(--ink-500); font-size:15px; margin-top:8px; max-width:640px; }

  .badge{
    display:inline-flex; align-items:center; gap:6px;
    padding:4px 10px; border-radius:var(--radius-badge);
    background:var(--brand-50); color:var(--brand-600);
    font-size:12px; font-weight:600; letter-spacing:.02em; line-height:1.6;
  }
  .badge-teal{ background:#E6F6F6; color:#0F7C7C; }
  .badge-accent{ background:#FEF3E4; color:#A9691A; }

  .card{
    background:var(--card); border:1px solid var(--line); border-radius:var(--radius-card);
    box-shadow:var(--shadow-1);
    transition:border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
  }
  .card:hover{ border-color:rgba(26,115,199,.3); box-shadow:var(--shadow-2); transform:translateY(-2px); }
  .card-pad{ padding:24px; }

  /* Hero */
  .hero{ position:relative; overflow:hidden; border-bottom:1px solid var(--line); }
  .hero-bg{
    position:absolute; inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover; background-position:center;
    opacity:.16;
  }
  .hero-veil{
    position:absolute; inset:0;
    background:linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(246,248,251,.96) 62%, #F6F8FB 100%);
  }
  .hero-inner{ position:relative; padding:56px 0 40px; }
  @media (min-width:1024px){ .hero-inner{ padding:76px 0 52px; } }
  .hero h1{ font-size:clamp(30px,4vw,50px); color:var(--brand-700); }
  .hero-sub{ margin-top:18px; font-size:16px; color:var(--ink-500); max-width:620px; }
  .hero-tags{ margin-top:22px; display:flex; flex-wrap:wrap; gap:10px; }
  .hero-cta{ margin-top:28px; display:flex; flex-wrap:wrap; gap:12px; }

  .metric-mini{
    background:#fff; border:1px solid var(--line); border-radius:var(--radius-card);
    padding:16px 18px; box-shadow:var(--shadow-1);
    transition:border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
  }
  .metric-mini:hover{ border-color:rgba(26,115,199,.3); box-shadow:var(--shadow-2); transform:translateY(-2px); }
  .metric-mini .val{ font-size:26px; font-weight:650; color:var(--brand-700); line-height:1.2; }
  .metric-mini .unit{ font-size:13px; color:var(--ink-400); margin-left:4px; }
  .metric-mini .lbl{ font-size:13px; color:var(--ink-500); margin-top:6px; }

  .trust-band{
    position:relative; border-top:1px solid var(--line); background:rgba(255,255,255,.7);
  }
  .trust-item{ display:flex; align-items:center; gap:10px; padding:16px 0; font-size:14px; color:var(--ink-500); }
  .trust-item svg{ color:var(--brand-500); flex:none; }

  /* 指标看板 */
  .stat-card{
    background:#fff; border:1px solid var(--line); border-top:3px solid var(--brand-500);
    border-radius:var(--radius-card); padding:22px; box-shadow:var(--shadow-1);
    transition:box-shadow .2s ease-out, transform .2s ease-out, border-color .2s ease-out;
  }
  .stat-card:hover{ box-shadow:var(--shadow-2); transform:translateY(-2px); }
  .stat-val{ font-size:32px; font-weight:700; color:var(--brand-700); line-height:1.15; }
  .stat-unit{ font-size:13px; color:var(--ink-400); margin-left:5px; }
  .stat-label{ font-size:15px; font-weight:600; color:var(--ink-700); margin-top:8px; }
  .stat-note{ font-size:12px; color:var(--ink-400); margin-top:6px; line-height:1.7; }

  /* bento 服务矩阵 */
  .bento-card{ display:flex; flex-direction:column; height:100%; padding:26px; }
  .bento-title{ font-size:19px; color:var(--brand-700); }
  .bento-desc{ font-size:15px; color:var(--ink-500); margin-top:10px; }
  .bento-list{ margin-top:16px; display:grid; gap:10px; }
  .bento-list li{ display:flex; gap:10px; font-size:14px; color:var(--ink-500); line-height:1.7; }
  .bento-list svg{ color:var(--brand-500); flex:none; margin-top:4px; }
  .bento-foot{ margin-top:auto; padding-top:18px; }

  .icon-box{
    width:44px; height:44px; border-radius:12px; background:var(--brand-50); color:var(--brand-600);
    display:inline-flex; align-items:center; justify-content:center; margin-bottom:14px;
  }
  .icon-box-teal{ background:#E6F6F6; color:#0F7C7C; }

  /* 对比 */
  .cmp-card{ border-radius:var(--radius-card); padding:24px; border:1px solid var(--line); height:100%; }
  .cmp-before{ background:#F3F5F9; border-color:#E1E6EE; }
  .cmp-after{ background:var(--brand-50); border-color:rgba(26,115,199,.25); }
  .cmp-head{ font-size:17px; font-weight:650; margin-bottom:14px; }
  .cmp-before .cmp-head{ color:var(--ink-500); }
  .cmp-after .cmp-head{ color:var(--brand-700); }
  .cmp-list li{ display:flex; gap:10px; font-size:14px; color:var(--ink-500); line-height:1.75; padding:7px 0; }
  .cmp-list svg{ flex:none; margin-top:5px; }
  .cmp-before .cmp-list svg{ color:var(--ink-400); }
  .cmp-after .cmp-list svg{ color:var(--brand-500); }
  .cmp-step{
    width:38px; height:38px; border-radius:999px; background:#fff; border:1px solid var(--line);
    display:inline-flex; align-items:center; justify-content:center;
    font-family:ui-monospace,monospace; font-size:14px; font-weight:700; color:var(--brand-600);
    box-shadow:var(--shadow-1);
  }

  .bar-row{ padding:14px 0; border-bottom:1px dashed var(--line); }
  .bar-row:last-child{ border-bottom:0; }
  .bar-track{ height:8px; border-radius:999px; background:#EAEFF6; overflow:hidden; margin-top:10px; }
  .bar-fill{ height:100%; border-radius:999px; background:var(--brand-500); }
  .bar-fill-teal{ background:var(--teal-500); }

  /* 资讯卡 */
  .news-card{ display:flex; flex-direction:column; overflow:hidden; }
  .news-cover{ position:relative; aspect-ratio:16/10; background:var(--brand-50); overflow:hidden; }
  .news-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .22s ease-out; }
  .news-card:hover .news-cover img{ transform:scale(1.03); }
  .news-body{ padding:20px; display:flex; flex-direction:column; gap:10px; flex:1; }
  .meta-row{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
  .meta-time{ font-size:12px; color:var(--ink-400); font-family:ui-monospace,monospace; }
  .news-title{ font-size:17px; color:var(--ink-700); line-height:1.55; }
  .news-sum{ font-size:14px; color:var(--ink-500); line-height:1.75; }
  .clamp-2{ display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }

  .empty-state{
    min-height:180px; border:1px dashed #C9D5E5; border-radius:var(--radius-card);
    background:#fff; display:flex; flex-direction:column; align-items:center; justify-content:center;
    gap:8px; padding:28px; text-align:center;
  }
  .empty-state svg{ color:var(--brand-200,#B6D3F0); }
  .empty-state p{ font-size:15px; color:var(--ink-500); }
  .empty-state .empty-sub{ font-size:13px; color:var(--ink-400); }

  /* FAQ */
  .faq-item{
    background:#fff; border:1px solid var(--line); border-left:4px solid transparent;
    border-radius:12px; margin-bottom:12px; overflow:hidden;
    transition:border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .faq-item:hover{ box-shadow:var(--shadow-1); }
  .faq-item[open]{ border-left-color:var(--brand-500); box-shadow:var(--shadow-1); }
  .faq-item summary{
    list-style:none; cursor:pointer; display:flex; align-items:center; justify-content:space-between;
    gap:16px; padding:18px 20px; font-size:16px; font-weight:600; color:var(--ink-700);
    transition:color .2s ease-out;
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary:hover{ color:var(--brand-500); }
  .faq-item summary .chev{ flex:none; color:var(--ink-400); transition:transform .2s ease-out; }
  .faq-item[open] summary .chev{ transform:rotate(180deg); color:var(--brand-500); }
  .faq-body{ padding:0 20px 20px; font-size:15px; color:var(--ink-500); animation:faqIn .2s ease-out; }
  @keyframes faqIn{ from{ opacity:0; transform:translateY(-4px); } to{ opacity:1; transform:translateY(0); } }

  /* 表单 */
  .form-panel{
    background:var(--brand-50); border:1px solid rgba(26,115,199,.18);
    border-radius:var(--radius-lg); padding:28px; box-shadow:var(--shadow-1);
  }
  @media (min-width:1024px){ .form-panel{ padding:40px; } }
  .field{ margin-bottom:18px; }
  .field label{ display:block; font-size:14px; font-weight:600; color:var(--ink-700); margin-bottom:8px; }
  .field .req{ color:#DC2626; margin-left:3px; }
  .field input,.field select,.field textarea{
    width:100%; min-height:46px; border-radius:var(--radius-btn);
    border:1px solid #CDD9E8; background:#fff; padding:11px 14px; font-size:15px;
    transition:border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .field textarea{ min-height:118px; resize:vertical; line-height:1.75; }
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(26,115,199,.2);
  }
  .field .hint{ font-size:12px; color:var(--ink-400); margin-top:6px; }
  .field.has-error input,.field.has-error select,.field.has-error textarea{ border-color:#DC2626; }
  .field .err{ display:none; font-size:12px; color:#DC2626; margin-top:6px; }
  .field.has-error .err{ display:block; }

  /* 页脚 */
  .site-footer{ background:var(--brand-700); color:#C9DCEF; }
  .site-footer a{ color:#C9DCEF; transition:color .2s ease-out; }
  .site-footer a:hover{ color:#FFFFFF; }
  .footer-title{ color:#fff; font-size:15px; font-weight:650; margin-bottom:14px; }
  .footer-links li{ margin-bottom:10px; font-size:14px; }
  .footer-bottom{ border-top:1px solid rgba(255,255,255,.14); margin-top:40px; padding:20px 0; font-size:13px; color:#9DB9D6; }

  @media (prefers-reduced-motion: reduce){
    *{ transition:none !important; animation:none !important; scroll-behavior:auto !important; }
    .card:hover,.stat-card:hover,.metric-mini:hover,.btn:hover{ transform:none !important; }
  }

/* roulang page: article */
:root{
  --brand-50:#EEF5FD;
  --brand-100:#DCEAFB;
  --brand-500:#1A73C7;
  --brand-600:#12589E;
  --brand-700:#0B3B62;
  --accent-500:#F2A03D;
  --teal-500:#17A2A2;
  --canvas:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --ink-700:#1F2A37;
  --ink-500:#5B6B84;
  --ink-300:#8A97AB;
  --ok:#16A34A;
  --warn:#DC2626;
  --radius-card:16px;
  --radius-lg:20px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 6px 24px -10px rgba(16,42,72,.14);
  --shadow-2:0 16px 38px -14px rgba(16,42,72,.22);
  --shadow-3:0 20px 44px -16px rgba(16,42,72,.26);
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*,*::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-700);
  background:var(--canvas);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
::selection{background:rgba(26,115,199,.18);}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#CBD7E6;border-radius:99px;border:2px solid var(--canvas);}
::-webkit-scrollbar-thumb:hover{background:#AFC2D8;}
::-webkit-scrollbar-track{background:transparent;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

.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:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.85);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:68px;display:flex;align-items:center;gap:18px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--brand-700);flex:none;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600);
  border:1px solid rgba(26,115,199,.14);
}
.nav-main{gap:2px;margin-left:6px;flex:1 1 auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 12px;border-radius:8px;
  font-size:15px;color:var(--ink-500);
  transition:color .18s ease-out,background-color .18s ease-out;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:9px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--brand-600);background:rgba(26,115,199,.05);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-700);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;width:200px;padding:0 12px;
  background:#F1F5FB;border:1px solid var(--line);border-radius:var(--radius-pill);
  color:var(--ink-300);
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;
}
.search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(26,115,199,.2);background:#fff;}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink-700);}
.search-box input::placeholder{color:var(--ink-300);}

.nav-toggle{
  width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;color:var(--ink-500);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.nav-toggle:hover{background:#F1F5FB;color:var(--brand-600);border-color:rgba(26,115,199,.3);}
.mobile-drawer{
  border-top:1px solid var(--line);background:#fff;
  padding:16px 0 20px;
}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;
  background:#F1F5FB;border:1px solid var(--line);border-radius:var(--radius-btn);color:var(--ink-300);
}
.drawer-search input{border:0;background:transparent;outline:none;width:100%;font-size:15px;}
.drawer-links{display:flex;flex-direction:column;margin-top:14px;}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 6px;border-bottom:1px solid var(--line);
  font-size:15.5px;color:var(--ink-700);
}
.drawer-links a:last-child{border-bottom:0;}
.drawer-links a.is-active{color:var(--brand-600);font-weight:600;}
.drawer-cta{margin-top:16px;display:flex;gap:10px;}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--brand-500);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-600);box-shadow:var(--shadow-2);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-accent{background:var(--accent-500);color:#3A2404;box-shadow:var(--shadow-1);}
.btn-accent:hover{background:#E08F2B;box-shadow:var(--shadow-2);transform:translateY(-1px);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-outline:hover{background:#F1F5FB;border-color:rgba(26,115,199,.35);}
.btn-ghost{background:transparent;color:var(--ink-500);}
.btn-ghost:hover{background:#F1F5FB;color:var(--brand-600);}
.btn[disabled],.btn.is-disabled{opacity:.55;pointer-events:none;box-shadow:none;}

/* ============ badges & tags ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-600);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(26,115,199,.14);
}
.badge-teal{background:rgba(23,162,162,.1);color:#0F7C7C;border-color:rgba(23,162,162,.2);}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--ink-500);
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.tag:hover{border-color:rgba(26,115,199,.35);color:var(--brand-600);background:var(--brand-50);}

/* ============ page banner ============ */
.page-banner{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-color:#EDF3FA;
}
.page-banner .banner-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.28;
}
.page-banner .banner-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.86) 0%,rgba(255,255,255,.98) 100%);
}
.page-banner .banner-inner{position:relative;z-index:2;padding-top:20px;padding-bottom:26px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-300);min-height:24px;}
.breadcrumb a{color:var(--ink-500);transition:color .18s ease-out;}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .current{color:var(--ink-700);max-width:min(560px,62vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.banner-note{margin-top:12px;font-size:13.5px;color:var(--ink-500);display:flex;flex-wrap:wrap;gap:8px 18px;}
.banner-note span{display:inline-flex;align-items:center;gap:6px;}

/* ============ article head ============ */
.article-title{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.32;
  color:var(--brand-700);
  font-weight:700;
  letter-spacing:-.015em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:16px;font-size:13.5px;color:var(--ink-300);
}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.article-lead{
  margin-top:18px;padding:16px 20px;
  background:var(--brand-50);border-left:4px solid var(--brand-500);
  border-radius:0 14px 14px 0;
  font-size:15px;color:var(--ink-500);
}

/* ============ cards ============ */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.card:hover{border-color:rgba(26,115,199,.3);box-shadow:var(--shadow-2);transform:translateY(-2px);}
.card-pad{padding:22px 24px;}

/* ============ metrics strip ============ */
.metric-strip{
  display:grid;gap:16px;
  grid-template-columns:1fr;
}
@media(min-width:768px){.metric-strip{grid-template-columns:repeat(3,1fr);}}
.metric-card{
  background:#fff;border:1px solid var(--line);border-top:3px solid var(--brand-500);
  border-radius:var(--radius-card);padding:20px 22px;box-shadow:var(--shadow-1);
}
.metric-value{font-size:30px;font-weight:700;color:var(--brand-700);line-height:1.2;}
.metric-value small{font-size:14px;font-weight:600;color:var(--ink-500);margin-left:4px;}
.metric-label{margin-top:8px;font-size:14.5px;font-weight:600;color:var(--ink-700);}
.metric-desc{margin-top:6px;font-size:12.5px;color:var(--ink-300);line-height:1.7;}

/* ============ article prose ============ */
.article-prose{font-size:16px;line-height:1.85;color:var(--ink-700);margin-top:26px;}
.article-prose > *:first-child{margin-top:0;}
.article-prose p{margin:0 0 1.15em;text-align:left;}
.article-prose h2{
  position:relative;font-size:clamp(21px,2.2vw,27px);font-weight:650;
  margin:34px 0 14px;padding-left:15px;color:var(--brand-700);
}
.article-prose h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:3px;background:var(--brand-500);
}
.article-prose h3{font-size:19px;font-weight:650;margin:26px 0 10px;color:var(--ink-700);}
.article-prose h4{font-size:17px;font-weight:650;margin:20px 0 8px;color:var(--ink-700);}
.article-prose ul,.article-prose ol{margin:0 0 1.15em;padding-left:1.3em;}
.article-prose ul li{list-style:disc;margin-bottom:.5em;}
.article-prose ol li{list-style:decimal;margin-bottom:.5em;}
.article-prose blockquote{
  margin:22px 0;padding:14px 20px;background:var(--brand-50);
  border-left:4px solid var(--brand-500);border-radius:0 12px 12px 0;color:var(--ink-500);
}
.article-prose a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-prose a:hover{color:var(--brand-500);}
.article-prose img{border-radius:12px;margin:20px 0 8px;}
.article-prose figure{margin:22px 0;}
.article-prose figcaption{font-size:13px;color:var(--ink-300);text-align:center;line-height:1.7;}
.article-prose hr{border:0;border-top:1px solid var(--line);margin:30px 0;}
.article-prose table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px;}
.article-prose th{background:var(--brand-50);text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);font-weight:650;color:var(--brand-700);}
.article-prose td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--ink-500);}
.article-prose .table-wrap,
.article-prose > div:has(table){overflow-x:auto;-webkit-overflow-scrolling:touch;}
.article-prose pre{background:#0F2540;color:#DCE8F6;padding:16px 18px;border-radius:12px;overflow-x:auto;font-family:var(--font-mono);font-size:13.5px;line-height:1.7;}
.article-prose code{font-family:var(--font-mono);font-size:.94em;background:#F1F5FB;border-radius:6px;padding:1px 6px;}

/* ============ empty state ============ */
.empty-state{
  border:1.5px dashed #C4D3E6;border-radius:var(--radius-card);
  background:#fff;min-height:180px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  text-align:center;padding:28px 20px;
}
.empty-state .empty-icon{color:var(--brand-500);}
.empty-state .empty-title{font-size:16px;font-weight:650;color:var(--ink-700);}
.empty-state .empty-desc{font-size:13.5px;color:var(--ink-300);}

/* ============ sidebar ============ */
.sidebar-sticky{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:20px 20px;box-shadow:var(--shadow-1);}
.side-title{font-size:15px;font-weight:650;color:var(--brand-700);display:flex;align-items:center;gap:8px;margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;align-items:center;gap:10px;min-height:40px;padding:0 10px;border-radius:8px;
  font-size:14px;color:var(--ink-500);transition:background-color .18s ease-out,color .18s ease-out;
}
.toc-list a:hover{background:var(--brand-50);color:var(--brand-600);}
.toc-list a::before{content:"";width:6px;height:6px;border-radius:50%;background:#C4D3E6;flex:none;}
.toc-list a:hover::before{background:var(--brand-500);}
.mini-post{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);}
.mini-post:last-child{border-bottom:0;padding-bottom:0;}
.mini-post:first-of-type{padding-top:0;}
.mini-cover{width:78px;height:52px;flex:none;border-radius:10px;overflow:hidden;background:#E8EFF8;border:1px solid var(--line);}
.mini-cover img{width:100%;height:100%;object-fit:cover;}
.mini-title{font-size:14px;font-weight:600;line-height:1.6;color:var(--ink-700);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mini-post:hover .mini-title{color:var(--brand-600);}
.mini-meta{font-size:12px;color:var(--ink-300);margin-top:4px;}
.side-cta{
  border-radius:var(--radius-lg);border:1px solid rgba(26,115,199,.2);
  background:var(--brand-50);padding:22px 20px;
}
.side-cta h3{font-size:17px;color:var(--brand-700);}
.side-cta p{margin-top:8px;font-size:13.5px;color:var(--ink-500);line-height:1.8;}
.side-cta .btn{width:100%;margin-top:14px;}

/* ============ content cards grid ============ */
.grid-3{display:grid;gap:22px;grid-template-columns:1fr;}
@media(min-width:640px){.grid-3{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr);}}
.post-card{display:flex;flex-direction:column;overflow:hidden;height:100%;}
.cover{aspect-ratio:16/10;background:#E8EFF8;overflow:hidden;border-radius:0;}
.cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s ease-out;}
.post-card:hover .cover img{transform:scale(1.03);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto;}
.post-title{
  font-size:17.5px;font-weight:650;line-height:1.55;color:var(--ink-700);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover .post-title{color:var(--brand-600);}
.post-excerpt{
  font-size:14px;color:var(--ink-500);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--ink-300);}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);transition:gap .18s ease-out,color .18s ease-out;}
.link-more:hover{gap:10px;color:var(--brand-500);}

/* ============ section heading ============ */
.section{padding-top:56px;padding-bottom:56px;}
@media(min-width:768px){.section{padding-top:72px;padding-bottom:72px;}}
@media(min-width:1024px){.section{padding-top:88px;padding-bottom:88px;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:26px;}
.section-title{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--brand-700);letter-spacing:-.015em;}
.section-sub{margin-top:8px;font-size:14.5px;color:var(--ink-500);max-width:680px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:rgba(26,115,199,.35);box-shadow:var(--shadow-1);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;font-size:16px;font-weight:600;color:var(--ink-700);
  transition:color .18s ease-out,border-color .18s ease-out;
  border-left:4px solid transparent;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item[open] summary{color:var(--brand-700);border-left-color:var(--brand-500);}
.faq-icon{flex:none;color:var(--brand-500);transition:transform .2s ease-out;}
.faq-item[open] .faq-icon{transform:rotate(180deg);}
.faq-answer{padding:0 20px 18px 24px;font-size:15px;color:var(--ink-500);}
.faq-answer p{margin:0 0 .8em;}
.faq-answer p:last-child{margin-bottom:0;}

/* ============ footer ============ */
.site-footer{background:var(--brand-700);color:#C7DAEC;margin-top:0;}
.site-footer a{color:#C7DAEC;transition:color .18s ease-out;}
.site-footer a:hover{color:#fff;}
.footer-title{font-size:15px;font-weight:650;color:#fff;margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  margin-top:40px;padding:20px 0 28px;
  font-size:13px;color:#9DB9D6;
}

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

/* roulang page: category1 */
:root{
  --brand-500:#1A73C7; --brand-600:#12589E; --brand-700:#0B3B62; --brand-50:#EEF5FD;
  --accent-500:#F2A03D; --accent-600:#D98A28; --teal-500:#17A2A2;
  --canvas:#F6F8FB; --card:#FFFFFF; --line:#E3E9F2;
  --ink-700:#1F2A37; --ink-500:#5B6B84; --ink-400:#8A97AB;
  --ok:#16A34A; --warn:#DC2626;
  --r-card:16px; --r-lg:20px; --r-btn:10px; --r-input:10px; --r-badge:999px;
  --sh-1:0 6px 24px -10px rgba(16,42,72,.14);
  --sh-2:0 16px 38px -14px rgba(16,42,72,.22);
  --sh-3:0 20px 44px -16px rgba(16,42,72,.26);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0; background:var(--canvas); color:var(--ink-700);
  font-family:var(--font-cn); font-size:16px; line-height:1.85;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
button,input,select,textarea{font:inherit; color:inherit;}
h1,h2,h3,h4{margin:0; font-weight:700; letter-spacing:-.01em; line-height:1.35;}
p{margin:0;}
ul,ol{margin:0; padding:0; list-style:none;}
::selection{background:var(--brand-50); color:var(--brand-700);}
:focus-visible{outline:2px solid var(--brand-500); outline-offset:2px;}

.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:1024px){ .container{padding-left:32px; padding-right:32px;} }

.num{font-family:var(--font-num); font-variant-numeric:tabular-nums; letter-spacing:-.02em;}
.section{padding-top:56px; padding-bottom:56px;}
@media (min-width:768px){ .section{padding-top:80px; padding-bottom:80px;} }
@media (min-width:1024px){ .section{padding-top:96px; padding-bottom:96px;} }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:60;
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex; align-items:center; gap:16px; height:68px;}
.brand-logo{display:inline-flex; align-items:center; gap:10px; flex:none;}
.brand-mark{
  display:inline-flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:11px; flex:none;
  background:var(--brand-500); color:#fff;
}
.brand-text{font-weight:700; font-size:17px; color:var(--ink-700); letter-spacing:-.01em; white-space:nowrap;}
.nav-main{display:none; align-items:center; gap:4px; margin-left:8px;}
@media (min-width:1024px){ .nav-main{display:flex;} }
.nav-link{
  position:relative; display:inline-flex; align-items:center; height:40px;
  padding:0 12px; font-size:14.5px; font-weight:500; color:var(--ink-500);
  border-radius:8px; transition:color .2s ease-out, background-color .2s ease-out;
}
.nav-link::after{
  content:""; position:absolute; left:12px; right:12px; bottom:6px; height:2px;
  background:var(--brand-500); transform:scaleX(0); transform-origin:left center;
  transition:transform .2s ease-out; border-radius:2px;
}
.nav-link:hover{color:var(--brand-600); background:var(--brand-50);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-600); font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:none; align-items:center; gap:12px; margin-left:auto;}
@media (min-width:1024px){ .header-actions{display:flex;} }
.search-box{position:relative;}
.search-box svg{position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--ink-400);}
.search-input{
  width:200px; height:40px; padding:0 12px 0 36px; border-radius:var(--r-input);
  border:1px solid var(--line); background:#fff; font-size:14px;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.search-input::placeholder{color:var(--ink-400);}
.search-input:focus{outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(26,115,199,.2);}
.link-quiet{font-size:14.5px; color:var(--ink-500); padding:8px 6px; border-radius:8px; transition:color .2s ease-out;}
.link-quiet:hover{color:var(--brand-600);}
.burger{
  margin-left:auto; display:inline-flex; align-items:center; justify-content:center;
  width:44px; height:44px; border:1px solid var(--line); border-radius:var(--r-btn);
  background:#fff; cursor:pointer; transition:background-color .2s ease-out, border-color .2s ease-out;
}
.burger:hover{background:var(--brand-50); border-color:var(--brand-300, #8FBDE9);}
@media (min-width:1024px){ .burger{display:none;} }
.drawer{
  display:none; border-top:1px solid var(--line); background:#fff;
  padding:16px; 
}
.drawer.is-open{display:block;}
.drawer .drawer-nav{display:flex; flex-direction:column; gap:2px; margin-top:12px;}
.drawer .drawer-nav a{
  display:flex; align-items:center; min-height:44px; padding:0 12px;
  border-radius:8px; font-size:15px; color:var(--ink-700);
}
.drawer .drawer-nav a:hover{background:var(--brand-50); color:var(--brand-600);}
.drawer .drawer-nav a.is-active{background:var(--brand-50); color:var(--brand-600); font-weight:600;}
.drawer .search-input{width:100%;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:44px; padding:0 20px; border-radius:var(--r-btn);
  font-size:15px; font-weight:600; border:1px solid transparent; cursor:pointer;
  transition:background-color .2s ease-out, border-color .2s ease-out, color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
}
.btn:disabled{opacity:.55; pointer-events:none;}
.btn-primary{background:var(--brand-500); color:#fff; box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--brand-600); box-shadow:var(--sh-2); transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-accent{background:var(--accent-500); color:#4A2B05; box-shadow:var(--sh-1);}
.btn-accent:hover{background:var(--accent-600); box-shadow:var(--sh-2); transform:translateY(-1px);}
.btn-secondary{background:#fff; border-color:var(--line); color:var(--ink-700);}
.btn-secondary:hover{background:#F1F5FB; border-color:var(--brand-300,#8FBDE9); color:var(--brand-600);}
.btn-ghost{background:transparent; color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-50);}
.btn-sm{min-height:38px; padding:0 14px; font-size:14px;}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex; align-items:center; gap:6px;
  padding:3px 10px; border-radius:var(--r-badge); font-size:12px; font-weight:600;
  letter-spacing:.02em; background:var(--brand-50); color:var(--brand-600);
  white-space:nowrap;
}
.badge-accent{background:#FEF3E4; color:#8A5207;}
.badge-teal{background:#E6F6F6; color:#0E6E6E;}
.badge-line{background:#fff; border:1px solid var(--line); color:var(--ink-500);}

/* ---------- cards ---------- */
.card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--sh-1); padding:22px;
  transition:border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
}
.card:hover{border-color:rgba(26,115,199,.3); box-shadow:var(--sh-2); transform:translateY(-2px);}
.card-flat:hover{transform:none;}
.card-title{font-size:18px; font-weight:700; margin-bottom:10px; color:var(--ink-700);}

/* ---------- hero ---------- */
.hero-band{position:relative; overflow:hidden; background:linear-gradient(180deg,#FFFFFF 0%, var(--canvas) 100%);}
.hero-media{
  position:absolute; inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover; background-position:center;
  opacity:.16;
}
.hero-veil{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(255,255,255,.62) 0%, rgba(255,255,255,.94) 62%, #FFFFFF 100%);
}
.h-eyebrow{font-size:13px; font-weight:600; color:var(--brand-600); letter-spacing:.06em; text-transform:uppercase;}
h1.page-title{font-size:clamp(30px,4vw,50px); font-weight:700; line-height:1.22;}
.lede{font-size:16px; line-height:1.85; color:var(--ink-500); max-width:760px;}

.anchor-bar{display:flex; flex-wrap:wrap; gap:8px;}
.anchor-bar a{
  display:inline-flex; align-items:center; min-height:36px; padding:0 14px;
  border-radius:var(--r-badge); border:1px solid var(--line); background:#fff;
  font-size:13.5px; color:var(--ink-500);
  transition:color .2s ease-out, border-color .2s ease-out, background-color .2s ease-out;
}
.anchor-bar a:hover{color:var(--brand-600); border-color:var(--brand-300,#8FBDE9); background:var(--brand-50);}

/* ---------- side anchors ---------- */
.side-anchors{position:relative;}
@media (min-width:1024px){
  .side-anchors{position:sticky; top:92px;}
}
.side-anchors ol{counter-reset:step; display:flex; flex-direction:column; gap:2px;}
.side-anchors a{
  display:flex; align-items:center; gap:10px; min-height:44px; padding:0 12px;
  border-radius:10px; font-size:14.5px; color:var(--ink-500);
  border-left:3px solid transparent;
  transition:color .2s ease-out, background-color .2s ease-out, border-color .2s ease-out;
}
.side-anchors a:hover{color:var(--brand-600); background:var(--brand-50); border-left-color:var(--brand-500);}
.side-anchors .idx{
  font-family:var(--font-num); font-size:12px; color:var(--ink-400);
  width:22px; flex:none;
}

/* ---------- metric strip ---------- */
.metric{
  background:#fff; border:1px solid var(--line); border-top:1px solid var(--brand-500);
  border-radius:var(--r-card); padding:20px; box-shadow:var(--sh-1);
  transition:box-shadow .2s ease-out, transform .2s ease-out, border-color .2s ease-out;
}
.metric:hover{box-shadow:var(--sh-2); transform:translateY(-2px); border-color:rgba(26,115,199,.3); border-top-color:var(--brand-600);}
.metric-value{font-family:var(--font-num); font-size:32px; font-weight:700; color:var(--brand-700); line-height:1.1;}
.metric-unit{font-size:13px; color:var(--ink-400); margin-left:4px; font-weight:500;}
.metric-note{font-size:12.5px; color:var(--ink-400); margin-top:8px; line-height:1.7;}

/* ---------- content blocks ---------- */
.block-head{display:flex; align-items:center; gap:10px; margin-bottom:14px;}
.block-head .bar{width:4px; height:20px; border-radius:2px; background:var(--brand-500); flex:none;}
h2.block-title{font-size:clamp(22px,2.4vw,32px); font-weight:700;}
h3.sub-title{font-size:19px; font-weight:700; margin-bottom:8px;}
.body-text{font-size:15.5px; line-height:1.9; color:var(--ink-500);}
.body-text + .body-text{margin-top:14px;}

.check-list li{
  display:flex; gap:12px; padding:12px 0; border-bottom:1px dashed var(--line);
  font-size:15px; color:var(--ink-500); line-height:1.8;
}
.check-list li:last-child{border-bottom:none;}
.check-list .dot{
  flex:none; width:20px; height:20px; margin-top:5px; border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--brand-50); color:var(--brand-600);
}
.check-list strong{color:var(--ink-700); font-weight:600;}

.step-row{display:flex; gap:14px; padding:16px 0; border-bottom:1px solid var(--line);}
.step-row:last-child{border-bottom:none;}
.step-num{
  flex:none; width:34px; height:34px; border-radius:10px; background:var(--brand-50);
  color:var(--brand-600); font-family:var(--font-num); font-weight:700; font-size:14px;
  display:inline-flex; align-items:center; justify-content:center;
}

.figure{border:1px solid var(--line); border-radius:var(--r-card); overflow:hidden; background:#fff; box-shadow:var(--sh-1);}
.figure img{width:100%; aspect-ratio:16/10; object-fit:cover; background:var(--brand-50);}
.figure figcaption{font-size:12.5px; color:var(--ink-400); padding:10px 14px; border-top:1px solid var(--line);}

.table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:var(--r-card); background:#fff; box-shadow:var(--sh-1);}
table.spec{width:100%; min-width:640px; border-collapse:collapse; font-size:14.5px;}
table.spec th, table.spec td{padding:14px 16px; text-align:left; border-bottom:1px solid var(--line); vertical-align:top;}
table.spec thead th{background:#F8FBFF; color:var(--ink-700); font-weight:600; font-size:13.5px; letter-spacing:.02em; white-space:nowrap;}
table.spec tbody tr:last-child td{border-bottom:none;}
table.spec tbody tr:hover{background:#FBFCFE;}
table.spec td:first-child{font-weight:600; color:var(--ink-700); white-space:nowrap;}

.compare-grid{display:grid; gap:16px;}
@media (min-width:900px){ .compare-grid{grid-template-columns:1fr 1fr;} }
.compare-card{border-radius:var(--r-lg); padding:24px; border:1px solid var(--line); background:#F8FAFD;}
.compare-card.is-after{background:var(--brand-50); border-color:rgba(26,115,199,.28);}
.compare-card h3{font-size:18px; margin-bottom:6px;}
.compare-card .tagline{font-size:12.5px; color:var(--ink-400); margin-bottom:14px;}
.compare-card li{display:flex; gap:10px; padding:9px 0; font-size:14.5px; color:var(--ink-500); line-height:1.75;}
.compare-card li svg{flex:none; margin-top:5px;}

/* ---------- FAQ ---------- */
.faq-item{
  background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
  border-left:4px solid transparent; margin-bottom:10px; overflow:hidden;
  transition:border-color .2s ease-out, box-shadow .2s ease-out, background-color .2s ease-out;
}
.faq-item:hover{box-shadow:var(--sh-1); border-color:rgba(26,115,199,.28); border-left-color:rgba(26,115,199,.35);}
.faq-item[open]{border-left-color:var(--brand-500); box-shadow:var(--sh-1);}
.faq-item summary{
  list-style:none; cursor:pointer; padding:16px 20px; font-size:16px; font-weight:600;
  color:var(--ink-700); display:flex; align-items:center; justify-content:space-between; gap:14px;
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item summary .chev{flex:none; transition:transform .2s ease-out; color:var(--ink-400);}
.faq-item[open] summary .chev{transform:rotate(180deg); color:var(--brand-500);}
.faq-body{padding:0 20px 18px; font-size:15px; line-height:1.88; color:var(--ink-500);}

/* ---------- CTA ---------- */
.cta-bar{
  background:var(--brand-700); color:#EAF2FA; border-radius:var(--r-lg);
  padding:26px 24px; display:flex; flex-wrap:wrap; gap:16px; align-items:center; justify-content:space-between;
  box-shadow:var(--sh-2);
}
.cta-bar p{font-size:15.5px; line-height:1.8; max-width:720px; color:#D8E6F4;}
.cta-panel{background:var(--brand-50); border-radius:var(--r-lg); padding:24px; border:1px solid rgba(26,115,199,.16);}
@media (min-width:768px){ .cta-panel{padding:32px;} }

/* ---------- form ---------- */
.field{display:flex; flex-direction:column; gap:6px; margin-bottom:16px;}
.field label{font-size:14px; font-weight:600; color:var(--ink-700);}
.field .req{color:var(--warn); margin-left:2px;}
.control{
  min-height:46px; padding:10px 14px; border-radius:var(--r-input);
  border:1px solid var(--line); background:#fff; font-size:15px; width:100%;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.control::placeholder{color:var(--ink-400);}
.control:focus{outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(26,115,199,.2);}
textarea.control{min-height:112px; resize:vertical; line-height:1.75;}
select.control{appearance:none; background-image:linear-gradient(45deg,transparent 50%, var(--ink-400) 50%), linear-gradient(135deg, var(--ink-400) 50%, transparent 50%); background-position:calc(100% - 20px) 21px, calc(100% - 14px) 21px; background-size:6px 6px,6px 6px; background-repeat:no-repeat;}
.hint{font-size:12.5px; color:var(--ink-400);}
.err{font-size:12.5px; color:var(--warn); display:none;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700); color:#C7DCF0; margin-top:0;}
.footer-title{font-size:14px; font-weight:700; color:#fff; letter-spacing:.04em; margin-bottom:14px;}
.footer-links li{margin-bottom:9px;}
.footer-links a{font-size:14px; color:#B7D0E9; transition:color .2s ease-out;}
.footer-links a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14); margin-top:40px; padding:20px 0 26px; font-size:13px; color:#9DB9D6;}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important; animation:none !important;}
  .card:hover,.metric:hover,.btn:hover{transform:none !important;}
}

/* roulang page: category2 */
:root {
    --brand-50: #EEF5FD;
    --brand-100: #DCEAFB;
    --brand-500: #1A73C7;
    --brand-600: #12589E;
    --brand-700: #0B3B62;
    --accent-500: #F2A03D;
    --teal-500: #17A2A2;
    --canvas: #F6F8FB;
    --card: #FFFFFF;
    --line: #E3E9F2;
    --ink-700: #1F2A37;
    --ink-500: #5B6B84;
    --ink-400: #8A97AB;
    --ok: #16A34A;
    --warn: #DC2626;
    --r-card: 16px;
    --r-lg: 20px;
    --r-btn: 10px;
    --sh-1: 0 6px 24px -10px rgba(16, 42, 72, .14);
    --sh-2: 0 16px 38px -14px rgba(16, 42, 72, .22);
    --sh-3: 0 20px 44px -16px rgba(16, 42, 72, .26);
    --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-num: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }

  *, *::before, *::after { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink-700);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -.01em; line-height: 1.3; color: #16202C; }
  p { margin: 0; }
  ul, ol { margin: 0; padding: 0; list-style: none; }
  a { color: inherit; text-decoration: none; transition: color .2s ease-out, background-color .2s ease-out, border-color .2s ease-out; }
  img { display: block; max-width: 100%; height: auto; }
  button, input, select, textarea { font: inherit; color: inherit; }
  :focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; border-radius: 6px; }
  ::selection { background: rgba(26, 115, 199, .16); }

  /* 容器与板块 */
  .shell { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
  @media (min-width: 640px) { .shell { padding: 0 24px; } }
  @media (min-width: 1024px) { .shell { padding: 0 32px; } }
  .section { padding: 56px 0; }
  @media (min-width: 768px) { .section { padding: 80px 0; } }
  @media (min-width: 1024px) { .section { padding: 96px 0; } }
  .section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
  .section-sub { font-size: 15px; color: var(--ink-500); max-width: 660px; margin-top: 10px; }
  .hairline { height: 1px; background: var(--line); border: 0; margin: 0; }

  /* 顶部导航 */
  .site-header {
    position: sticky; top: 0; z-index: 60;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner { display: flex; align-items: center; gap: 18px; height: 68px; }
  .brand { display: flex; align-items: center; gap: 10px; flex: none; }
  .brand-mark {
    width: 36px; height: 36px; border-radius: 11px; flex: none;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--brand-500); color: #fff;
  }
  .brand-text { font-size: 17px; font-weight: 700; letter-spacing: -.01em; color: #16202C; white-space: nowrap; }
  .nav-main { gap: 2px; margin-left: 6px; }
  .nav-link {
    position: relative; display: inline-flex; align-items: center;
    min-height: 40px; padding: 8px 12px; border-radius: 8px;
    font-size: 15px; color: var(--ink-500); white-space: nowrap;
  }
  .nav-link::after {
    content: ""; position: absolute; left: 12px; right: 12px; bottom: 4px; height: 2px;
    background: var(--brand-500); transform: scaleX(0); transform-origin: left;
    transition: transform .2s ease-out;
  }
  .nav-link:hover { color: var(--brand-600); }
  .nav-link:hover::after,
  .nav-link.is-active::after { transform: scaleX(1); }
  .nav-link.is-active { color: var(--brand-600); font-weight: 600; }
  .header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
  .header-search { position: relative; display: none; }
  @media (min-width: 1024px) { .header-search { display: block; } }
  .header-search input {
    width: 200px; height: 40px; padding: 0 38px 0 14px;
    border: 1px solid var(--line); border-radius: var(--r-btn);
    background: var(--canvas); font-size: 14px; color: var(--ink-700);
    transition: border-color .2s ease-out, box-shadow .2s ease-out, background-color .2s ease-out;
  }
  .header-search input::placeholder { color: var(--ink-400); }
  .header-search input:focus {
    background: #fff; border-color: var(--brand-500);
    box-shadow: 0 0 0 3px rgba(26, 115, 199, .18); outline: none;
  }
  .header-search .s-ico { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-400); pointer-events: none; }

  /* 按钮 */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 44px; padding: 0 20px; border-radius: var(--r-btn);
    font-size: 15px; font-weight: 600; border: 1px solid transparent; cursor: pointer;
    transition: background-color .2s ease-out, color .2s ease-out, border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
  }
  .btn-primary { background: var(--brand-500); color: #fff; box-shadow: var(--sh-1); }
  .btn-primary:hover { background: var(--brand-600); box-shadow: var(--sh-2); transform: translateY(-1px); }
  .btn-primary:active { transform: translateY(0); }
  .btn-outline { background: #fff; border-color: var(--line); color: var(--brand-600); }
  .btn-outline:hover { background: #F1F5FB; border-color: rgba(26, 115, 199, .35); }
  .btn-accent { background: var(--accent-500); color: #3B2606; }
  .btn-accent:hover { background: #E8942C; box-shadow: var(--sh-2); transform: translateY(-1px); }
  .btn-ghost { background: transparent; color: var(--brand-600); }
  .btn-ghost:hover { background: var(--brand-50); }
  .btn-sm { min-height: 38px; padding: 0 16px; font-size: 14px; }
  .btn:disabled { opacity: .55; pointer-events: none; }
  .btn-text { display: inline-flex; align-items: center; min-height: 40px; padding: 0 10px; font-size: 15px; color: var(--ink-500); border-radius: 8px; }
  .btn-text:hover { color: var(--brand-600); background: var(--brand-50); }
  .link-more { display: inline-flex; align-items: center; gap: 6px; font-size: 14.5px; font-weight: 600; color: var(--brand-600); }
  .link-more:hover { color: var(--brand-700); }
  .link-more svg { transition: transform .2s ease-out; }
  .link-more:hover svg { transform: translateX(2px); }

  /* 移动端抽屉 */
  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border: 1px solid var(--line); border-radius: var(--r-btn);
    background: #fff; color: var(--ink-700); cursor: pointer;
    transition: background-color .2s ease-out, border-color .2s ease-out;
  }
  .nav-toggle:hover { background: var(--brand-50); border-color: rgba(26, 115, 199, .3); }
  @media (min-width: 1024px) { .nav-toggle { display: none; } }
  .mobile-drawer { border-top: 1px solid var(--line); background: #fff; padding: 16px 0 20px; }
  .mobile-drawer[hidden] { display: none; }
  .drawer-search { position: relative; margin-bottom: 12px; }
  .drawer-search input {
    width: 100%; height: 46px; padding: 0 40px 0 14px;
    border: 1px solid var(--line); border-radius: var(--r-btn);
    background: var(--canvas); font-size: 15px;
  }
  .drawer-search input:focus { background: #fff; border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(26, 115, 199, .18); outline: none; }
  .drawer-search .s-ico { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--ink-400); }
  .drawer-link {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 50px; font-size: 15.5px; color: var(--ink-700);
    border-bottom: 1px solid var(--line);
  }
  .drawer-link:last-of-type { border-bottom: 0; }
  .drawer-link.is-active { color: var(--brand-600); font-weight: 600; }
  .drawer-cta { margin-top: 14px; display: flex; flex-direction: column; gap: 10px; }

  /* 分类页头部 */
  .cat-hero { position: relative; overflow: hidden; background: #fff; border-bottom: 1px solid var(--line); }
  .cat-hero-bg {
    position: absolute; inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover; background-position: center; opacity: .16;
  }
  .cat-hero-veil {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, .74) 0%, rgba(255, 255, 255, .94) 58%, #fff 100%);
  }
  .cat-hero-inner { position: relative; padding: 48px 0 44px; }
  @media (min-width: 1024px) { .cat-hero-inner { padding: 76px 0 68px; } }
  .h1 { font-size: clamp(30px, 4vw, 50px); line-height: 1.18; font-weight: 700; letter-spacing: -.02em; color: #111C28; max-width: 940px; }
  .h2 { font-size: clamp(22px, 2.4vw, 32px); line-height: 1.3; }
  .h3 { font-size: 19px; line-height: 1.45; }
  .lede { font-size: 16px; line-height: 1.9; color: var(--ink-500); max-width: 760px; margin-top: 18px; }
  .badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 5px 12px; border-radius: 999px;
    background: var(--brand-50); color: var(--brand-600);
    font-size: 12.5px; font-weight: 600; letter-spacing: .02em; white-space: nowrap;
  }
  .chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
  .chip {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line);
    background: #fff; font-size: 13.5px; color: var(--ink-500);
  }
  .chip svg { color: var(--brand-500); flex: none; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

  /* 更新条 */
  .update-strip {
    display: flex; flex-wrap: wrap; align-items: center; gap: 14px 30px;
    padding: 16px 22px; background: #fff; border: 1px solid var(--line);
    border-radius: var(--r-card); box-shadow: var(--sh-1);
  }
  .update-label { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700; color: var(--brand-600); }
  .update-item { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; color: var(--ink-500); }
  .update-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-500); flex: none; }

  /* 双列大卡 */
  .big-grid { display: grid; grid-template-columns: 1fr; gap: 22px; }
  @media (min-width: 1024px) { .big-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; } }
  .big-card {
    display: grid; grid-template-columns: minmax(0, 1fr); overflow: hidden;
    background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--sh-1);
    transition: box-shadow .2s ease-out, border-color .2s ease-out, transform .2s ease-out;
  }
  .big-card:hover { border-color: rgba(26, 115, 199, .3); box-shadow: var(--sh-2); transform: translateY(-2px); }
  @media (min-width: 700px) { .big-card { grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); } }
  .big-card-body { padding: 24px 22px; display: flex; flex-direction: column; }
  @media (min-width: 1024px) { .big-card-body { padding: 28px 26px; } }
  .big-card-media { position: relative; aspect-ratio: 16 / 10; background: #E7EEF7; overflow: hidden; }
  .big-card-media img { width: 100%; height: 100%; object-fit: cover; }
  .big-card-index {
    font-family: var(--font-num); font-size: 13px; font-weight: 700; color: var(--brand-500);
    letter-spacing: .06em;
  }
  .big-card-desc { margin-top: 10px; font-size: 15px; color: var(--ink-500); line-height: 1.85; }
  .tick-list { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
  .tick-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--ink-500); line-height: 1.7; }
  .tick-list svg { flex: none; margin-top: 6px; color: var(--brand-500); }
  .card-foot { margin-top: auto; padding-top: 18px; }

  /* 要点条 */
  .point-bar { display: grid; grid-template-columns: 1fr; gap: 14px; }
  @media (min-width: 640px) { .point-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
  @media (min-width: 1024px) { .point-bar { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; } }
  .point-item {
    display: flex; gap: 14px; padding: 20px; background: #fff; border: 1px solid var(--line);
    border-radius: var(--r-card); box-shadow: var(--sh-1);
    transition: box-shadow .2s ease-out, border-color .2s ease-out, transform .2s ease-out;
  }
  .point-item:hover { border-color: rgba(26, 115, 199, .3); box-shadow: var(--sh-2); transform: translateY(-2px); }
  .point-ico {
    width: 42px; height: 42px; border-radius: 12px; flex: none;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--brand-50); color: var(--brand-600);
  }
  .point-title { font-size: 16px; font-weight: 700; color: #16202C; }
  .point-text { margin-top: 6px; font-size: 14px; color: var(--ink-500); line-height: 1.75; }

  /* 说明列表 */
  .rule-panel {
    background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
    box-shadow: var(--sh-1); padding: 26px 22px;
  }
  @media (min-width: 1024px) { .rule-panel { padding: 34px 36px; } }
  .rule-row {
    display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px;
    padding: 18px 0; border-bottom: 1px dashed var(--line);
  }
  .rule-row:first-of-type { padding-top: 0; }
  .rule-row:last-of-type { border-bottom: 0; padding-bottom: 0; }
  @media (min-width: 768px) {
    .rule-row { grid-template-columns: 200px minmax(0, 1fr); gap: 20px; align-items: start; }
  }
  .rule-key { font-size: 15px; font-weight: 700; color: #16202C; }
  .rule-val { font-size: 15px; color: var(--ink-500); line-height: 1.85; }
  .num { font-family: var(--font-num); font-variant-numeric: tabular-nums; font-weight: 700; color: var(--brand-600); }

  /* FAQ */
  .faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 940px; }
  .faq-item {
    background: #fff; border: 1px solid var(--line); border-left: 4px solid transparent;
    border-radius: 14px; box-shadow: var(--sh-1); overflow: hidden;
    transition: border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .faq-item[open] { border-left-color: var(--brand-500); box-shadow: var(--sh-2); }
  .faq-item summary {
    list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px;
    min-height: 58px; padding: 16px 22px; font-size: 16px; font-weight: 600; color: #16202C;
    transition: color .2s ease-out;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary:hover { color: var(--brand-600); }
  .faq-arrow { flex: none; color: var(--ink-400); transition: transform .2s ease-out, color .2s ease-out; }
  .faq-item[open] .faq-arrow { transform: rotate(180deg); color: var(--brand-500); }
  .faq-body { padding: 0 22px 20px; font-size: 15px; color: var(--ink-500); line-height: 1.85; }
  .faq-body p + p { margin-top: 10px; }

  /* 表单 CTA */
  .cta-panel {
    background: var(--brand-50); border: 1px solid #D6E6F8; border-radius: var(--r-lg);
    padding: 28px 20px;
  }
  @media (min-width: 1024px) { .cta-panel { padding: 46px 48px; } }
  .cta-points { display: flex; flex-direction: column; gap: 12px; margin-top: 22px; }
  .cta-points li { display: flex; gap: 10px; font-size: 14.5px; color: var(--brand-700); line-height: 1.7; }
  .cta-points svg { flex: none; margin-top: 6px; color: var(--brand-500); }
  .form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  @media (max-width: 639px) { .form-grid { grid-template-columns: minmax(0, 1fr); } }
  .field { display: flex; flex-direction: column; gap: 8px; }
  .field.full { grid-column: 1 / -1; }
  .field label { font-size: 14px; font-weight: 600; color: #22303F; }
  .field .req { color: var(--warn); margin-left: 2px; }
  .control {
    width: 100%; min-height: 46px; padding: 11px 14px;
    border: 1px solid #D7E0EC; border-radius: var(--r-btn); background: #fff;
    font-size: 15px; color: var(--ink-700);
    transition: border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .control::placeholder { color: var(--ink-400); }
  .control:focus { border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(26, 115, 199, .18); outline: none; }
  .control[aria-invalid="true"] { border-color: var(--warn); box-shadow: 0 0 0 3px rgba(220, 38, 38, .12); }
  textarea.control { min-height: 118px; resize: vertical; line-height: 1.8; }
  .select-wrap { position: relative; }
  .select-wrap select { appearance: none; -webkit-appearance: none; padding-right: 42px; cursor: pointer; }
  .select-wrap .sel-ico { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--ink-400); pointer-events: none; }
  .err { display: none; font-size: 12.5px; color: var(--warn); }
  .err.show { display: block; }
  .form-note { font-size: 12.5px; color: var(--ink-500); }
  .form-msg {
    display: none; margin-top: 14px; padding: 12px 16px; border-radius: var(--r-btn);
    background: #EAF6EE; border: 1px solid #BFE3CC; color: #14612F; font-size: 14px;
  }
  .form-msg.show { display: block; }

  /* 页脚 */
  .site-footer { background: var(--brand-700); color: #CFE0F1; }
  .site-footer p, .site-footer li { font-size: 14px; line-height: 1.85; color: #BBD2E8; }
  .footer-title { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 14px; }
  .footer-links { display: flex; flex-direction: column; gap: 10px; }
  .footer-links a { color: #BBD2E8; font-size: 14px; }
  .footer-links a:hover { color: #fff; }
  .footer-bottom { margin-top: 38px; padding: 18px 0 26px; border-top: 1px solid rgba(255, 255, 255, .14); font-size: 13px; }
  .footer-bottom p { font-size: 13px; color: #9DB9D6; }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
    .btn:hover, .big-card:hover, .point-item:hover { transform: none !important; }
    html { scroll-behavior: auto; }
  }