/* roulang page: index */
:root{
      --primary:#2F6FEB;
      --primary-dark:#1F4FA3;
      --primary-soft:#EAF3FF;
      --cyan:#5CC8E8;
      --warm:#F5B85B;
      --bg:#F6FAFF;
      --bg-2:#FAFCFF;
      --surface:#FFFFFF;
      --text:#172033;
      --muted:#5F6F86;
      --weak:#8190A6;
      --border:#E3ECF6;
      --border-strong:#BBD3F8;
      --success:#2FA66A;
      --warning:#F59E0B;
      --shadow:0 10px 30px rgba(31,79,135,.07);
      --shadow-strong:0 20px 50px rgba(31,79,135,.11);
      --radius-sm:10px;
      --radius:16px;
      --radius-lg:24px;
      --radius-xl:32px;
      --sidebar:104px;
      --container:1220px;
      --ease:180ms ease;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 18% 8%, rgba(92,200,232,.18), transparent 28%),
        radial-gradient(circle at 88% 18%, rgba(47,111,235,.10), transparent 26%),
        linear-gradient(180deg,#FAFCFF 0%,#F6FAFF 46%,#FFFFFF 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(47,111,235,.18)}
    :focus-visible{outline:3px solid rgba(47,111,235,.28);outline-offset:3px}
    .site-shell{min-height:100vh;padding-left:var(--sidebar)}
    .container{width:min(var(--container), calc(100% - 80px));margin:0 auto}
    .section{padding:88px 0}
    .section-tight{padding:64px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      color:var(--primary-dark);background:var(--primary-soft);
      border:1px solid #D9E9FF;font-size:13px;font-weight:700;
    }
    .eyebrow::before{
      content:"";width:8px;height:8px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 0 0 5px rgba(92,200,232,.14);
    }
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:34px}
    .section-kicker{color:var(--primary);font-size:14px;font-weight:800;letter-spacing:.04em;margin:0 0 8px}
    h1,h2,h3,p{margin-top:0}
    h1{
      margin-bottom:22px;font-size:clamp(32px,4.2vw,48px);
      line-height:1.18;letter-spacing:-.03em;font-weight:800;
    }
    h2{
      margin-bottom:14px;font-size:clamp(26px,3vw,36px);
      line-height:1.25;letter-spacing:-.025em;font-weight:800;
    }
    h3{font-size:21px;line-height:1.35;margin-bottom:10px}
    .lead{font-size:17px;line-height:1.9;color:var(--muted)}
    .muted{color:var(--muted)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:12px 18px;border-radius:14px;
      border:1px solid transparent;font-weight:800;font-size:15px;
      transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
      white-space:nowrap;
    }
    .btn:active{transform:translateY(1px)}
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 14px 28px rgba(47,111,235,.22)}
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 18px 36px rgba(31,79,163,.25)}
    .btn-secondary{background:#fff;color:var(--primary);border-color:var(--border-strong)}
    .btn-secondary:hover{background:#EEF6FF;transform:translateY(-2px)}
    .btn-ghost{background:transparent;color:var(--primary);border-color:#D7E7FA}
    .btn-ghost:hover{background:#F2F8FF}
    .tag{
      display:inline-flex;align-items:center;border-radius:999px;
      padding:5px 10px;background:#EAF3FF;color:var(--primary-dark);
      font-size:12px;font-weight:800;border:1px solid #D9E9FF;
    }
    .desktop-sidebar{
      position:fixed;z-index:50;left:0;top:0;width:var(--sidebar);height:100vh;
      display:flex;flex-direction:column;align-items:center;
      padding:22px 12px;background:linear-gradient(180deg,#F2F8FF 0%,#FFFFFF 78%);
      border-right:1px solid var(--border);box-shadow:8px 0 28px rgba(31,79,135,.04);
    }
    .brand-mark{
      width:64px;min-height:88px;border-radius:22px;
      display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
      color:var(--primary-dark);background:#fff;border:1px solid #DCEBFB;
      box-shadow:var(--shadow);padding:8px 6px;text-align:center;
    }
    .brand-symbol{
      width:34px;height:34px;border-radius:12px;
      display:grid;place-items:center;color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 12px 24px rgba(47,111,235,.18);
    }
    .brand-short{font-size:11px;line-height:1.18;font-weight:900;letter-spacing:.02em}
    .side-nav{margin-top:34px;width:100%;display:flex;flex-direction:column;gap:10px}
    .side-link{
      position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;
      padding:12px 6px;border-radius:16px;color:#63748D;font-size:12px;font-weight:800;
      transition:background var(--ease),color var(--ease),transform var(--ease);
    }
    .side-link svg{width:21px;height:21px;stroke:currentColor;stroke-width:2;fill:none}
    .side-link:hover{background:#F0F7FF;color:var(--primary);transform:translateX(1px)}
    .side-link.active{background:#EAF3FF;color:var(--primary-dark)}
    .side-link.active::before{
      content:"";position:absolute;left:-12px;top:14px;bottom:14px;width:4px;border-radius:999px;background:var(--primary);
    }
    .side-trust{
      margin-top:auto;width:100%;padding:12px 8px;border-radius:16px;text-align:center;
      background:#fff;border:1px solid var(--border);color:var(--muted);font-size:11px;line-height:1.55;
    }
    .side-trust strong{display:block;color:var(--primary-dark);font-size:12px;margin-bottom:2px}
    .mobile-header{display:none}
    .hero{position:relative;padding:58px 0 82px}
    .hero::before{
      content:"";position:absolute;right:-120px;top:30px;width:360px;height:360px;border-radius:50%;
      background:rgba(92,200,232,.12);filter:blur(6px);z-index:-1;
    }
    .hero-grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(430px,.86fr);gap:54px;align-items:center}
    .hero-copy .eyebrow{margin-bottom:20px}
    .hero-copy .lead{max-width:660px;margin-bottom:28px}
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
    .hero-note{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:14px}
    .note-pill{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;background:#fff;border:1px solid var(--border);border-radius:999px}
    .note-pill i{width:8px;height:8px;border-radius:50%;background:var(--success)}
    .dashboard{
      position:relative;min-height:500px;border-radius:var(--radius-xl);
      background:linear-gradient(145deg,#FFFFFF,#F2F8FF);
      border:1px solid #DDEAF8;box-shadow:var(--shadow-strong);
      overflow:hidden;padding:28px;
    }
    .dashboard::before{
      content:"";position:absolute;inset:0;
      background-image:linear-gradient(rgba(47,111,235,.07) 1px, transparent 1px),linear-gradient(90deg, rgba(47,111,235,.07) 1px, transparent 1px);
      background-size:26px 26px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.18));
    }
    .dash-top,.metric-card,.dash-panel{position:relative;z-index:1}
    .dash-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
    .dash-title{font-weight:900;color:var(--primary-dark)}
    .status{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--success);font-weight:800}
    .status::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 5px rgba(47,166,106,.12)}
    .dash-panel{
      margin-top:18px;padding:22px;border-radius:22px;background:rgba(255,255,255,.86);
      border:1px solid rgba(227,236,246,.9);box-shadow:0 16px 36px rgba(31,79,135,.08);
    }
    .panel-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 0;border-bottom:1px solid #EDF3FA}
    .panel-row:last-child{border-bottom:0}
    .bar{height:9px;border-radius:999px;background:#E6EEF8;overflow:hidden;flex:1;max-width:170px}
    .bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),var(--cyan))}
    .metric-card{
      position:absolute;width:178px;padding:18px;border-radius:20px;background:#fff;border:1px solid var(--border);
      box-shadow:0 14px 34px rgba(31,79,135,.10);
    }
    .metric-card strong{display:block;font-size:26px;line-height:1.15;color:var(--primary-dark);margin-bottom:5px}
    .metric-card span{font-size:13px;color:var(--muted)}
    .metric-a{right:28px;top:112px}
    .metric-b{left:30px;bottom:40px}
    .metric-c{right:42px;bottom:74px}
    .orbit{
      position:absolute;left:54px;top:112px;width:138px;height:138px;border-radius:50%;
      border:1px dashed rgba(47,111,235,.26);z-index:1;
    }
    .orbit::after{content:"";position:absolute;right:8px;top:18px;width:18px;height:18px;border-radius:50%;background:var(--warm);box-shadow:0 0 0 8px rgba(245,184,91,.13)}
    .pain-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:44px;align-items:start}
    .sticky-copy{position:sticky;top:36px}
    .problem-list{display:flex;flex-direction:column;gap:18px}
    .problem-card,.quote-card,.info-card,.faq-item{
      background:#fff;border:1px solid var(--border);border-radius:var(--radius);
      box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
    }
    .problem-card{display:grid;grid-template-columns:52px 1fr;gap:18px;padding:24px}
    .problem-card:hover,.quote-card:hover,.info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-strong);border-color:#CFE2F8}
    .icon-box{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:#EEF6FF;color:var(--primary);
    }
    .icon-box svg{width:25px;height:25px;stroke:currentColor;stroke-width:2;fill:none}
    .problem-card p{margin:0;color:var(--muted);font-size:15px}
    .solution{background:linear-gradient(180deg,#FFFFFF 0%,#F6FAFF 100%);border-top:1px solid #EFF5FC;border-bottom:1px solid #EFF5FC}
    .steps{
      position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px;
    }
    .steps::before{
      content:"";position:absolute;left:10%;right:10%;top:42px;height:2px;background:linear-gradient(90deg,#D8E9FF,var(--cyan),#D8E9FF);
    }
    .step{
      position:relative;background:#fff;border:1px solid var(--border);border-radius:22px;padding:24px;
      box-shadow:var(--shadow);min-height:190px;
    }
    .step-num{
      position:relative;z-index:1;width:42px;height:42px;border-radius:50%;
      display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:900;margin-bottom:18px;
      box-shadow:0 12px 24px rgba(47,111,235,.18);
    }
    .step p{margin:0;color:var(--muted);font-size:15px}
    .result-band{
      position:relative;overflow:hidden;background:#F3F8FF;border:1px solid #DDEBFB;border-radius:28px;
      padding:30px;box-shadow:var(--shadow);
    }
    .result-band::after{
      content:"";position:absolute;right:-70px;top:-90px;width:260px;height:260px;border-radius:50%;
      background:rgba(92,200,232,.18);
    }
    .stats-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .stat-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:22px;box-shadow:0 8px 22px rgba(31,79,135,.05)}
    .stat-card strong{display:block;font-size:34px;line-height:1;color:var(--primary-dark);margin-bottom:10px}
    .stat-card span{font-size:14px;color:var(--muted)}
    .latest-wrap{
      display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:22px;align-items:stretch;
    }
    .info-card{padding:24px;display:flex;flex-direction:column;min-height:230px}
    .info-card.featured{min-height:100%;border-radius:24px;background:linear-gradient(145deg,#fff,#F7FBFF)}
    .info-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}
    .info-time{color:var(--weak);font-size:13px;font-weight:700}
    .info-title{font-size:21px;line-height:1.35;margin-bottom:10px;transition:color var(--ease)}
    .featured .info-title{font-size:26px}
    .info-card:hover .info-title{color:var(--primary)}
    .info-summary{
      color:var(--muted);font-size:15px;margin-bottom:20px;
      display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
    }
    .info-link{margin-top:auto;color:var(--primary);font-weight:900;display:inline-flex;align-items:center;gap:8px}
    .info-link::after{content:"→";transition:transform var(--ease)}
    .info-card:hover .info-link::after{transform:translateX(3px)}
    .compact-list{display:grid;grid-template-columns:1fr;gap:16px}
    .empty-state{
      grid-column:1/-1;text-align:center;background:#fff;border:1px dashed #BBD3F8;border-radius:24px;
      padding:42px 24px;box-shadow:var(--shadow);
    }
    .empty-ill{
      width:74px;height:74px;margin:0 auto 16px;border-radius:50%;
      background:radial-gradient(circle at 34% 32%,#fff 0 16%,#BFE8F6 17% 38%,#EAF3FF 39% 100%);
      box-shadow:0 12px 30px rgba(47,111,235,.13);
    }
    .trust-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .quote-card{position:relative;padding:30px;overflow:hidden}
    .quote-card::before{
      content:"“";position:absolute;right:24px;top:-10px;color:#DCEBFF;font-size:96px;font-weight:900;line-height:1;
    }
    .quote-card p{position:relative;color:#334158;font-size:17px;line-height:1.85;margin-bottom:20px}
    .quote-person{display:flex;align-items:center;justify-content:space-between;gap:14px;color:var(--muted);font-size:14px}
    .scenario-tags{display:flex;flex-wrap:wrap;gap:8px}
    .faq-list{display:grid;gap:14px;max-width:920px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;background:#fff;border:0;display:flex;align-items:center;justify-content:space-between;
      padding:19px 22px;text-align:left;color:var(--text);font-size:16px;font-weight:900;
      transition:background var(--ease);
    }
    .faq-q:hover{background:#F5FAFF}
    .faq-q span:last-child{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#EEF6FF;color:var(--primary);transition:transform var(--ease)}
    .faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
    .faq-a{display:none;padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.85}
    .faq-item.open .faq-a{display:block}
    .contact-cta{
      position:relative;overflow:hidden;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;
      padding:36px;border-radius:30px;background:linear-gradient(135deg,#EAF3FF,#F8FCFF);
      border:1px solid #D8E9FB;box-shadow:var(--shadow-strong);
    }
    .contact-cta::before{
      content:"";position:absolute;inset:0;
      background-image:radial-gradient(circle,rgba(47,111,235,.10) 1px, transparent 1px);
      background-size:22px 22px;opacity:.7;
    }
    .contact-cta>*{position:relative}
    .contact-cta h2{margin-bottom:10px}
    .contact-cta p{margin:0;color:var(--muted);max-width:680px}
    .footer{
      margin-top:18px;padding:42px 0 28px;background:#F7FAFE;border-top:1px solid var(--border);
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:start}
    .footer-brand{display:flex;gap:14px;align-items:flex-start}
    .footer-logo{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      color:#fff;font-weight:900;background:linear-gradient(135deg,var(--primary),var(--cyan));
      flex:0 0 auto;
    }
    .footer h3{font-size:18px;margin-bottom:6px}
    .footer p{color:var(--muted);font-size:14px;margin:0;max-width:680px}
    .footer-links{display:flex;justify-content:flex-end;gap:16px;flex-wrap:wrap}
    .footer-links a{color:var(--muted);font-weight:800;font-size:14px}
    .footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
    .copyright{margin-top:28px;padding-top:20px;border-top:1px solid #E7EEF7;color:var(--weak);font-size:13px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
    @media (max-width:1199px){
      :root{--sidebar:92px}
      .container{width:min(100% - 56px, 1120px)}
      .hero-grid{grid-template-columns:1fr;gap:34px}
      .dashboard{min-height:430px}
      .pain-layout{grid-template-columns:1fr}
      .sticky-copy{position:static}
      .steps{grid-template-columns:repeat(2,1fr)}
      .steps::before{display:none}
      .stats-grid{grid-template-columns:repeat(2,1fr)}
      .latest-wrap{grid-template-columns:1fr}
    }
    @media (max-width:767px){
      .site-shell{padding-left:0;padding-top:70px}
      .desktop-sidebar{display:none}
      .mobile-header{
        position:fixed;z-index:60;left:0;right:0;top:0;height:70px;
        display:flex;align-items:center;justify-content:space-between;gap:12px;
        padding:10px 18px;background:rgba(250,252,255,.96);backdrop-filter:blur(12px);
        border-bottom:1px solid var(--border);
      }
      .mobile-brand{display:flex;align-items:center;gap:10px;min-width:0;font-weight:900;color:var(--primary-dark);line-height:1.2}
      .mobile-brand .brand-symbol{width:38px;height:38px;flex:0 0 auto}
      .mobile-brand span{font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
      .menu-btn{
        width:44px;height:44px;border-radius:14px;border:1px solid var(--border);
        background:#fff;color:var(--primary);display:grid;place-items:center;
      }
      .mobile-menu{
        display:none;position:fixed;z-index:59;left:14px;right:14px;top:78px;
        padding:12px;background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-strong);
      }
      .mobile-menu.open{display:block}
      .mobile-menu a{display:flex;padding:13px 14px;border-radius:12px;color:var(--muted);font-weight:900}
      .mobile-menu a:hover,.mobile-menu a.active{background:#EEF6FF;color:var(--primary)}
      .container{width:min(100% - 36px, 680px)}
      .section{padding:62px 0}
      .section-tight{padding:48px 0}
      .section-head{display:block;margin-bottom:26px}
      .hero{padding:36px 0 56px}
      .hero-actions .btn{flex:1 1 100%}
      .dashboard{padding:20px;min-height:auto}
      .metric-card{position:relative;left:auto;right:auto;top:auto;bottom:auto;width:auto;margin-top:14px}
      .orbit{display:none}
      .dash-panel{padding:18px}
      .panel-row{align-items:flex-start;flex-direction:column}
      .bar{width:100%;max-width:none}
      .problem-card{grid-template-columns:44px 1fr;padding:20px;gap:14px}
      .icon-box{width:44px;height:44px;border-radius:14px}
      .steps,.stats-grid,.trust-grid{grid-template-columns:1fr}
      .step{min-height:auto}
      .result-band{padding:22px;border-radius:24px}
      .featured .info-title{font-size:22px}
      .contact-cta{grid-template-columns:1fr;padding:26px;border-radius:24px}
      .contact-cta .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:480px){
      .container{width:min(100% - 28px, 440px)}
      h1{font-size:30px}
      h2{font-size:25px}
      .lead{font-size:16px}
      .hero-note{display:block}
      .note-pill{margin:0 0 8px}
      .info-card,.quote-card{padding:20px}
      .faq-q{padding:17px 18px}
      .faq-a{padding:0 18px 18px}
    }

/* roulang page: article */
:root{
      --primary:#2F6FEB;
      --primary-dark:#1F4FA3;
      --cyan:#5CC8E8;
      --warm:#F5B85B;
      --success:#2FA66A;
      --warning:#F59E0B;
      --bg:#F6FAFF;
      --bg-soft:#FAFCFF;
      --surface:#FFFFFF;
      --surface-blue:#F3F8FF;
      --text:#172033;
      --muted:#5F6F86;
      --light:#8A99AD;
      --border:#E3ECF6;
      --border-strong:#CFE0F4;
      --shadow:0 10px 30px rgba(31,79,135,.07);
      --shadow-lg:0 20px 50px rgba(31,79,135,.11);
      --radius-sm:10px;
      --radius:16px;
      --radius-lg:24px;
      --radius-xl:32px;
      --side:104px;
      --container:1180px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 88% 8%, rgba(92,200,232,.18), transparent 28%),
        radial-gradient(circle at 16% 22%, rgba(47,111,235,.10), transparent 26%),
        linear-gradient(180deg,#FAFCFF 0%,#F6FAFF 46%,#FFFFFF 100%);
      line-height:1.75;
      min-height:100vh;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(47,111,235,.16);color:var(--primary-dark)}
    :focus-visible{outline:3px solid rgba(47,111,235,.28);outline-offset:3px;border-radius:10px}
    .page-shell{min-height:100vh}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .desktop-rail{
      position:fixed;
      z-index:50;
      left:0;
      top:0;
      width:var(--side);
      height:100vh;
      padding:18px 12px;
      background:linear-gradient(180deg,#F2F8FF 0%,#FFFFFF 58%,#F7FAFE 100%);
      border-right:1px solid var(--border);
      display:flex;
      flex-direction:column;
      align-items:center;
      box-shadow:8px 0 30px rgba(31,79,135,.04);
    }
    .rail-brand{
      width:100%;
      display:flex;
      flex-direction:column;
      align-items:center;
      gap:10px;
      padding:8px 4px 18px;
      border-bottom:1px solid var(--border);
    }
    .brand-mark{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 12px 26px rgba(47,111,235,.22);
      letter-spacing:.04em;
    }
    .rail-brand span{
      font-size:12px;
      line-height:1.35;
      font-weight:800;
      text-align:center;
      color:var(--primary-dark);
      writing-mode:vertical-rl;
      letter-spacing:.08em;
      max-height:150px;
    }
    .side-nav{
      width:100%;
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:22px;
      align-items:center;
    }
    .side-link{
      width:76px;
      min-height:70px;
      border-radius:18px;
      color:var(--muted);
      display:flex;
      flex-direction:column;
      justify-content:center;
      align-items:center;
      gap:7px;
      position:relative;
      transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease;
    }
    .side-link svg{
      width:23px;
      height:23px;
      stroke:currentColor;
      stroke-width:1.9;
      fill:none;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .side-link span{font-size:13px;font-weight:700}
    .side-link:hover{
      background:#EEF6FF;
      color:var(--primary);
      transform:translateY(-1px);
    }
    .side-link.active{
      background:#EAF3FF;
      color:var(--primary);
      box-shadow:inset 3px 0 0 var(--primary);
    }
    .rail-trust{
      margin-top:auto;
      width:100%;
      border:1px solid var(--border);
      background:rgba(255,255,255,.78);
      border-radius:18px;
      padding:12px 8px;
      text-align:center;
      color:var(--muted);
      font-size:12px;
      line-height:1.55;
    }
    .rail-trust strong{
      display:block;
      color:var(--primary-dark);
      font-size:13px;
      margin-bottom:3px;
    }
    .mobile-header{
      display:none;
      position:sticky;
      top:0;
      z-index:60;
      background:rgba(250,252,255,.94);
      backdrop-filter:blur(14px);
      border-bottom:1px solid var(--border);
    }
    .mobile-bar{
      height:66px;
      width:min(100% - 32px, var(--container));
      margin:0 auto;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }
    .mobile-logo{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
    }
    .mobile-logo .brand-mark{width:40px;height:40px;border-radius:14px;flex:0 0 auto}
    .mobile-logo strong{
      display:block;
      font-size:14px;
      line-height:1.25;
      color:var(--primary-dark);
      white-space:normal;
    }
    .menu-toggle{
      width:42px;
      height:42px;
      border:1px solid var(--border-strong);
      background:#fff;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:var(--primary-dark);
      box-shadow:var(--shadow);
    }
    .menu-toggle i,
    .menu-toggle i::before,
    .menu-toggle i::after{
      content:"";
      width:18px;
      height:2px;
      display:block;
      background:currentColor;
      border-radius:99px;
      transition:transform .2s ease,opacity .2s ease;
    }
    .menu-toggle i::before{transform:translateY(-6px)}
    .menu-toggle i::after{transform:translateY(4px)}
    .mobile-menu{
      display:none;
      width:min(100% - 32px,var(--container));
      margin:0 auto 14px;
      padding:10px;
      border:1px solid var(--border);
      background:#fff;
      border-radius:18px;
      box-shadow:var(--shadow);
    }
    .mobile-menu.open{display:block}
    .mobile-menu a{
      display:flex;
      align-items:center;
      gap:10px;
      padding:13px 14px;
      border-radius:14px;
      color:var(--primary);
      font-weight:700;
      background:#F3F8FF;
    }
    .main-area{
      margin-left:var(--side);
      min-height:100vh;
    }
    .article-hero{
      padding:48px 0 34px;
      position:relative;
      overflow:hidden;
    }
    .article-hero::before{
      content:"";
      position:absolute;
      right:-120px;
      top:-160px;
      width:430px;
      height:430px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(92,200,232,.18),transparent 68%);
      pointer-events:none;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      font-size:14px;
      color:var(--muted);
      margin-bottom:24px;
    }
    .breadcrumb a{
      color:var(--primary);
      font-weight:700;
      transition:color .2s ease;
    }
    .breadcrumb a:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:4px}
    .breadcrumb .sep{color:#A7B5C7}
    .breadcrumb .current{
      max-width:560px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .article-title-wrap{
      max-width:900px;
      position:relative;
      z-index:1;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:#EAF3FF;
      color:var(--primary-dark);
      font-weight:800;
      font-size:13px;
      border:1px solid #D8E9FF;
      margin-bottom:16px;
    }
    .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 5px rgba(47,166,106,.10);
    }
    h1{
      margin:0;
      font-size:clamp(30px,4.2vw,42px);
      line-height:1.2;
      letter-spacing:-.02em;
      color:var(--text);
      font-weight:800;
    }
    .article-summary{
      margin:18px 0 0;
      max-width:760px;
      font-size:17px;
      line-height:1.85;
      color:var(--muted);
    }
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:22px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 12px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--border);
      color:var(--muted);
      font-size:13px;
      font-weight:700;
      box-shadow:0 8px 22px rgba(31,79,135,.05);
    }
    .pill.blue{background:#EEF6FF;color:var(--primary-dark);border-color:#D7E8FF}
    .pill.warm{background:#FFF8EC;color:#8A5A11;border-color:#F8E4BE}
    .article-layout{
      display:grid;
      grid-template-columns:minmax(0,820px) 280px;
      gap:34px;
      align-items:start;
      padding:14px 0 72px;
    }
    .reader-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
      padding:34px;
      overflow:hidden;
    }
    .article-content{
      color:#27364A;
      font-size:17px;
      line-height:1.92;
      overflow-wrap:anywhere;
    }
    .article-content p{margin:0 0 1.25em}
    .article-content h2{
      margin:42px 0 16px;
      font-size:26px;
      line-height:1.35;
      color:var(--text);
      letter-spacing:-.01em;
    }
    .article-content h3{
      margin:30px 0 12px;
      font-size:21px;
      line-height:1.45;
      color:var(--text);
    }
    .article-content h4{
      margin:24px 0 10px;
      font-size:18px;
      color:var(--primary-dark);
    }
    .article-content a{
      color:var(--primary);
      font-weight:700;
      text-decoration:none;
      border-bottom:1px solid rgba(47,111,235,.25);
      transition:color .2s ease,border-color .2s ease;
    }
    .article-content a:hover{
      color:var(--primary-dark);
      border-color:var(--primary-dark);
    }
    .article-content ul,
    .article-content ol{
      margin:0 0 1.35em 1.25em;
      padding:0;
    }
    .article-content li{margin:.45em 0;padding-left:.18em}
    .article-content blockquote{
      margin:28px 0;
      padding:20px 22px;
      border-left:4px solid var(--primary);
      background:#F3F8FF;
      border-radius:14px;
      color:#344A66;
      box-shadow:inset 0 0 0 1px rgba(47,111,235,.06);
    }
    .article-content blockquote p:last-child{margin-bottom:0}
    .article-content img{
      width:auto;
      max-width:100%;
      height:auto;
      margin:28px auto;
      border-radius:18px;
      box-shadow:0 14px 34px rgba(31,79,135,.10);
      border:1px solid var(--border);
    }
    .article-content table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      margin:26px 0;
      overflow:hidden;
      border:1px solid var(--border);
      border-radius:16px;
      display:block;
      max-width:100%;
      overflow-x:auto;
      background:#fff;
    }
    .article-content thead{background:#EEF6FF}
    .article-content th,
    .article-content td{
      padding:13px 15px;
      border-bottom:1px solid var(--border);
      white-space:nowrap;
      text-align:left;
      font-size:15px;
    }
    .article-content th{
      color:var(--primary-dark);
      font-weight:800;
    }
    .article-content tr:last-child td{border-bottom:0}
    .article-content code,
    .article-content pre{
      background:#F1F6FC;
      color:#28435F;
      border:1px solid #DDE9F6;
      border-radius:10px;
    }
    .article-content code{
      padding:.15em .42em;
      font-size:.92em;
    }
    .article-content pre{
      padding:16px;
      overflow:auto;
      line-height:1.7;
    }
    .empty-state{
      text-align:center;
      padding:56px 18px;
      border:1px dashed #CFE0F4;
      background:linear-gradient(180deg,#F8FBFF,#FFFFFF);
      border-radius:22px;
    }
    .empty-icon{
      width:76px;
      height:76px;
      margin:0 auto 18px;
      border-radius:28px;
      background:
        radial-gradient(circle at 70% 28%,rgba(245,184,91,.45),transparent 18%),
        linear-gradient(135deg,#EAF3FF,#F7FBFF);
      display:grid;
      place-items:center;
      color:var(--primary);
      font-weight:900;
      font-size:28px;
      border:1px solid #D7E8FF;
    }
    .empty-state h2{
      margin:0 0 10px;
      font-size:24px;
      color:var(--text);
    }
    .empty-state p{
      margin:0 auto 22px;
      color:var(--muted);
      max-width:460px;
    }
    .sidebar{
      position:sticky;
      top:28px;
      display:flex;
      flex-direction:column;
      gap:16px;
    }
    .side-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:22px;
      padding:20px;
      box-shadow:var(--shadow);
    }
    .side-card h2,
    .side-card h3{
      margin:0 0 12px;
      font-size:18px;
      line-height:1.4;
      color:var(--text);
    }
    .side-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
    }
    .btn-row{
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:10px 16px;
      border-radius:14px;
      border:1px solid transparent;
      font-weight:800;
      line-height:1.2;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn-primary{
      color:#fff;
      background:var(--primary);
      box-shadow:0 14px 28px rgba(47,111,235,.22);
    }
    .btn-primary:hover{background:var(--primary-dark);box-shadow:0 16px 34px rgba(31,79,163,.26)}
    .btn-secondary{
      color:var(--primary);
      background:#fff;
      border-color:#BBD3F8;
    }
    .btn-secondary:hover{background:#EEF6FF;border-color:#8FB8F5}
    .related-list{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .related-item{
      padding:14px;
      border:1px solid var(--border);
      background:#FAFCFF;
      border-radius:16px;
      transition:transform .2s ease,border-color .2s ease,background .2s ease;
    }
    .related-item:hover{
      transform:translateY(-2px);
      border-color:#BBD3F8;
      background:#F3F8FF;
    }
    .related-item strong{
      display:block;
      font-size:14px;
      line-height:1.55;
      color:var(--text);
      margin-bottom:6px;
    }
    .related-item span{
      display:block;
      font-size:12px;
      color:var(--light);
    }
    .brand-mini{
      position:relative;
      overflow:hidden;
      background:linear-gradient(135deg,#F3F8FF 0%,#FFFFFF 62%);
    }
    .brand-mini::after{
      content:"";
      position:absolute;
      right:-32px;
      bottom:-36px;
      width:104px;
      height:104px;
      border-radius:50%;
      background:rgba(92,200,232,.18);
    }
    .brand-mini .mini-logo{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      color:#fff;
      font-weight:900;
      margin-bottom:12px;
      box-shadow:0 12px 26px rgba(47,111,235,.18);
    }
    .reading-note{
      display:grid;
      gap:10px;
      padding:18px;
      background:#F8FBFF;
      border:1px solid var(--border);
      border-radius:18px;
      margin-top:28px;
    }
    .reading-note strong{color:var(--primary-dark)}
    .reading-note span{font-size:14px;color:var(--muted);line-height:1.75}
    .article-cta{
      margin-top:34px;
      border:1px solid #D7E8FF;
      background:
        linear-gradient(135deg,#EEF6FF 0%,#FFFFFF 70%),
        radial-gradient(circle at 90% 18%,rgba(92,200,232,.20),transparent 30%);
      border-radius:24px;
      padding:26px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:20px;
      align-items:center;
      box-shadow:var(--shadow);
    }
    .article-cta h2{
      margin:0 0 8px;
      font-size:23px;
      line-height:1.35;
      color:var(--text);
    }
    .article-cta p{
      margin:0;
      color:var(--muted);
      line-height:1.75;
    }
    .quality-strip{
      padding:0 0 74px;
    }
    .strip-card{
      border-radius:26px;
      background:#F3F8FF;
      border:1px solid #DCEBFB;
      padding:24px;
      display:grid;
      grid-template-columns:1.2fr repeat(3,1fr);
      gap:14px;
      box-shadow:var(--shadow);
    }
    .strip-intro{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:20px;
    }
    .strip-intro h2{margin:0 0 8px;font-size:22px}
    .strip-intro p{margin:0;color:var(--muted);font-size:14px}
    .metric{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:18px;
      display:flex;
      flex-direction:column;
      justify-content:center;
      min-height:118px;
    }
    .metric strong{
      font-size:26px;
      line-height:1;
      color:var(--primary);
      margin-bottom:10px;
    }
    .metric span{
      color:var(--muted);
      font-size:14px;
      line-height:1.6;
    }
    .footer{
      margin-left:var(--side);
      background:#F7FAFE;
      border-top:1px solid var(--border);
      padding:36px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1fr auto;
      gap:28px;
      align-items:center;
    }
    .footer-brand{
      display:flex;
      align-items:flex-start;
      gap:14px;
      max-width:720px;
    }
    .footer-logo{
      width:44px;
      height:44px;
      border-radius:15px;
      flex:0 0 auto;
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:900;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 12px 24px rgba(47,111,235,.18);
    }
    .footer-brand h3{
      margin:0 0 7px;
      font-size:18px;
      color:var(--primary-dark);
    }
    .footer-brand p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      justify-content:flex-end;
      gap:10px;
    }
    .footer-links a{
      padding:9px 12px;
      border-radius:999px;
      color:var(--muted);
      font-weight:700;
      font-size:14px;
      transition:background .2s ease,color .2s ease;
    }
    .footer-links a:hover{
      background:#EAF3FF;
      color:var(--primary);
    }
    .copyright{
      margin-top:24px;
      padding-top:18px;
      border-top:1px solid var(--border);
      display:flex;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
      color:var(--light);
      font-size:13px;
    }
    @media (max-width:1199px){
      :root{--side:92px}
      .desktop-rail{width:var(--side);padding-left:8px;padding-right:8px}
      .side-link{width:70px}
      .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:24px}
      .container{width:min(var(--container),calc(100% - 36px))}
      .strip-card{grid-template-columns:1fr 1fr}
    }
    @media (max-width:991px){
      .article-layout{grid-template-columns:1fr}
      .sidebar{position:static;display:grid;grid-template-columns:1fr 1fr}
      .sidebar .brand-mini{grid-column:1/-1}
      .article-cta{grid-template-columns:1fr}
      .article-cta .btn-row{flex-direction:row;flex-wrap:wrap}
    }
    @media (max-width:767px){
      .desktop-rail{display:none}
      .mobile-header{display:block}
      .main-area,.footer{margin-left:0}
      .article-hero{padding:32px 0 20px}
      .container{width:min(100% - 32px,var(--container))}
      .breadcrumb{font-size:13px;margin-bottom:18px}
      .breadcrumb .current{max-width:100%}
      .article-summary{font-size:16px}
      .reader-card{padding:22px;border-radius:22px}
      .article-content{font-size:16px;line-height:1.9}
      .article-content h2{font-size:24px;margin-top:34px}
      .article-content h3{font-size:20px}
      .sidebar{grid-template-columns:1fr}
      .quality-strip{padding-bottom:54px}
      .strip-card{grid-template-columns:1fr;padding:18px;border-radius:22px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .mobile-bar{width:calc(100% - 24px)}
      .container{width:calc(100% - 24px)}
      .mobile-logo strong{font-size:13px}
      h1{font-size:28px}
      .meta-row{gap:8px}
      .pill{font-size:12px;padding:7px 10px}
      .reader-card{padding:18px}
      .article-content table{font-size:14px}
      .article-cta{padding:20px;border-radius:20px}
      .article-cta .btn-row{flex-direction:column}
      .btn{width:100%}
      .footer-brand{flex-direction:column}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }