/* roulang page: index */
:root{
      --blue:#1769d2;
      --blue-deep:#123d76;
      --blue-soft:#eaf3ff;
      --cyan:#36b8c7;
      --ink:#162b46;
      --muted:#64748b;
      --paper:#ffffff;
      --mist:#f4f8fc;
      --line:#dce7f2;
      --accent:#f2a84b;
      --radius:22px;
      --shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;font-size:16px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    :focus-visible{outline:3px solid rgba(23,105,210,.35);outline-offset:3px}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:78px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:24px;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .nav-link{font-size:14px;color:#4b617b!important;padding:9px 12px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .phase-wrap{display:flex;gap:6px;align-items:center;margin-left:12px}
    .phase{font-size:12px;padding:5px 10px;border:1px solid var(--line);border-radius:30px;color:#75879b;white-space:nowrap}
    .phase.active{border-color:#9bc5f4;background:var(--blue-soft);color:var(--blue);font-weight:700}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .hero{padding:78px 0 34px;background:linear-gradient(180deg,#fff 0%,#f2f8ff 100%);overflow:hidden}
    .hero-copy{padding:30px 0 42px}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--blue);font-weight:800;text-transform:uppercase}
    h1{font-size:clamp(38px,5vw,66px);line-height:1.16;letter-spacing:-.045em;margin:15px 0 24px;color:var(--blue-deep);font-weight:850}
    .hero-lead{max-width:650px;color:#536b84;font-size:18px;line-height:1.9;margin-bottom:28px}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep);margin-left:8px}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .hero-note{display:flex;gap:24px;flex-wrap:wrap;margin-top:25px;color:var(--muted);font-size:13px}
    .hero-note strong{display:block;color:var(--blue-deep);font-size:21px;line-height:1.3}
    .hero-visual{position:relative;margin-left:auto;max-width:540px}
    .hero-visual img{width:100%;height:390px;object-fit:cover;border-radius:28px;box-shadow:var(--shadow)}
    .visual-card{position:absolute;left:-28px;bottom:24px;background:#fff;border:1px solid var(--line);border-radius:17px;padding:16px 19px;box-shadow:var(--shadow-sm);font-size:13px;color:var(--muted)}
    .visual-card b{display:block;color:var(--blue-deep);font-size:20px}
    .section{padding:80px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    h2{font-size:clamp(28px,3.2vw,42px);line-height:1.25;color:var(--blue-deep);margin:8px 0 0;font-weight:800;letter-spacing:-.03em}
    .section-desc{max-width:610px;color:var(--muted);margin:0}
    .metrics{margin-top:20px}
    .metric-board{background:#fff;border:1px solid var(--line);border-radius:24px;padding:9px;box-shadow:var(--shadow-sm)}
    .metric{padding:25px 26px;border-right:1px solid var(--line);height:100%}
    .metric:last-child{border-right:0}
    .metric small{display:block;color:var(--muted);font-size:13px;margin-bottom:8px}
    .metric strong{display:block;color:var(--blue);font-size:35px;line-height:1.2;letter-spacing:-.04em}
    .metric span{font-size:13px;color:#8293a5}
    .matrix{background:#fff;border-radius:var(--radius);padding:28px;border:1px solid var(--line);box-shadow:var(--shadow-sm);height:100%;transition:.25s}
    .matrix:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .matrix.tall{min-height:275px;background:var(--blue-deep);color:#fff}
    .matrix.tall h3,.matrix.tall p{color:#fff}
    .matrix h3{font-size:21px;margin:16px 0 10px;color:var(--blue-deep)}
    .matrix p{color:var(--muted);font-size:14px;margin:0}
    .matrix-no{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.12em}
    .matrix.tall .matrix-no{color:#9fd9ff}
    .matrix-tag{display:inline-block;margin-top:20px;padding:5px 9px;border-radius:20px;background:var(--blue-soft);color:var(--blue);font-size:12px}
    .matrix.tall .matrix-tag{background:rgba(255,255,255,.13);color:#d9f2ff}
    .compare{background:#eef6ff;padding:34px;border-radius:var(--radius);border:1px solid #d4e6f7}
    .compare-panel{height:100%;background:#fff;border-radius:17px;padding:25px;border:1px solid var(--line)}
    .compare-panel.improved{border-color:#8bc6e9;background:#fafdff}
    .compare-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;font-weight:800;color:var(--blue-deep)}
    .status{font-size:12px;border-radius:20px;padding:4px 9px;background:#f4ece0;color:#a46a22}
    .improved .status{background:#dff6ef;color:#168064}
    .compare-list{list-style:none;padding:0;margin:0}
    .compare-list li{padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
    .compare-list li:last-child{border-bottom:0}
    .compare-list b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
    .brand-story{background:#fff}
    .story-box{padding:36px 40px;border-left:4px solid var(--blue);background:#f9fcff;border-radius:0 20px 20px 0}
    .story-box p{color:#526b83;margin:0 0 15px}
    .story-box p:last-child{margin-bottom:0}
    .feature-img{height:330px;width:100%;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-sm)}
    .news-area{background:#f1f7fc}
    .news-list{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden}
    .news-item{display:flex;gap:18px;align-items:center;padding:19px 23px;border-bottom:1px solid var(--line)}
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:#f7fbff}
    .news-date{font-size:12px;color:var(--blue);min-width:74px;font-weight:700}
    .news-item strong{font-size:16px;color:var(--blue-deep)}
    .news-item span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
    .recommend{height:100%;padding:25px;border-radius:20px;background:var(--blue-deep);color:#fff}
    .recommend img{height:145px;width:100%;object-fit:cover;border-radius:14px;margin-bottom:17px}
    .recommend h3{font-size:22px}
    .recommend p{color:#c8d9eb;font-size:14px}
    .faq-wrap{max-width:920px;margin:auto}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:12px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:20px 22px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 22px 21px;color:var(--muted);font-size:14px}
    .cta-section{padding:78px 0}
    .cta-panel{background:#e8f3ff;border:1px solid #c6def5;border-radius:26px;padding:42px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    .back-top{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;box-shadow:var(--shadow-sm)}
    @media(max-width:991px){
      .phase-wrap{margin:10px 0;flex-wrap:wrap}
      .nav-contact{margin:8px 0}
      .hero{padding-top:45px}
      .hero-visual{margin-top:25px;max-width:none}
      .metric{border-right:0;border-bottom:1px solid var(--line)}
      .metric:nth-last-child(-n+2){border-bottom:0}
      .story-box{margin-top:25px}
    }
    @media(max-width:767px){
      body{font-size:15px}
      .navbar{min-height:68px}
      .brand{font-size:21px}
      .hero{padding:35px 0 20px}
      .hero-copy{padding:15px 0 25px}
      h1{font-size:38px}
      .hero-lead{font-size:16px}
      .btn-main,.btn-sub{width:100%;margin:5px 0}
      .hero-visual img{height:260px}
      .visual-card{left:15px;bottom:15px}
      .section{padding:55px 0}
      .section-head{display:block}
      .section-desc{margin-top:14px}
      .metric{padding:19px 14px}
      .metric strong{font-size:28px}
      .matrix{min-height:0!important;margin-bottom:15px;padding:23px}
      .compare{padding:18px}
      .compare-panel{margin-bottom:15px}
      .story-box,.cta-panel{padding:25px 21px}
      .feature-img{height:240px}
      .news-item{align-items:flex-start;gap:10px;padding:16px}
      .news-date{min-width:60px}
      .recommend{margin-top:18px}
    }

/* roulang page: category1 */
:root{
      --blue:#1769d2;--blue-deep:#123d76;--blue-soft:#eaf3ff;--cyan:#36b8c7;
      --ink:#162b46;--muted:#64748b;--paper:#fff;--mist:#f4f8fc;--line:#dce7f2;
      --accent:#f2a84b;--radius:22px;--shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08)
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:68px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:21px;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .nav-link{font-size:14px;color:#4b617b!important;padding:9px 12px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .phase-wrap{display:flex;gap:6px;margin-left:auto;padding:5px 0}
    .phase{font-size:12px;color:#71839a;border:1px solid #cbdbea;border-radius:20px;padding:3px 10px;white-space:nowrap}
    .phase:hover,.phase.active{background:var(--blue-soft);border-color:#a9c9ec;color:var(--blue)}
    .navbar-toggler{padding:7px 9px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,210,.16)}
    .hero-inner{padding:62px 0 72px;background:#fff}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--blue);font-weight:800}
    h1{font-size:clamp(34px,5vw,61px);line-height:1.18;letter-spacing:-.045em;margin:14px 0 22px;color:var(--blue-deep);font-weight:800}
    h2{font-size:clamp(26px,3vw,38px);line-height:1.3;color:var(--blue-deep);margin:8px 0 15px;font-weight:800}
    h3{color:var(--blue-deep);font-size:19px;line-height:1.4}
    .hero-lead{max-width:650px;color:#536b84;font-size:18px;line-height:1.9;margin-bottom:28px}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep);margin-left:8px}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .hero-panel{background:#eef6ff;border:1px solid #cde1f5;border-radius:28px;padding:25px;position:relative;box-shadow:var(--shadow)}
    .hero-panel img{height:275px;width:100%;object-fit:cover;border-radius:19px}
    .panel-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;color:var(--blue-deep);font-weight:800}
    .status-badge,.matrix-tag{display:inline-block;padding:5px 10px;border-radius:20px;background:#d9f4f2;color:#147a7a;font-size:12px;font-weight:700}
    .floating-data{position:absolute;right:-18px;bottom:22px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px 17px;box-shadow:var(--shadow-sm);font-size:12px;color:var(--muted)}
    .floating-data strong{display:block;color:var(--blue);font-size:22px;line-height:1.2}
    .section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-desc{max-width:620px;color:var(--muted);margin:0}
    .metrics{margin-top:-1px;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .metric{padding:28px 24px;border-right:1px solid var(--line);min-height:125px}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:32px;color:var(--blue-deep);line-height:1.2}
    .metric span{font-size:13px;color:var(--muted)}
    .metric small{display:block;color:var(--cyan);font-size:12px;margin-top:6px}
    .content-band{background:#f0f7fd}
    .number-list{border-top:1px solid var(--line)}
    .number-item{display:grid;grid-template-columns:72px 1fr 150px;gap:22px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line)}
    .number{font-size:27px;font-weight:800;color:#a8c9ea}
    .number-item p{margin:5px 0 0;color:var(--muted);max-width:680px}
    .item-side{text-align:right;color:var(--blue);font-size:13px;font-weight:700}
    .insight-card{height:100%;background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--shadow-sm);transition:.25s}
    .insight-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .insight-card img{height:155px;width:100%;object-fit:cover;border-radius:14px;margin-bottom:20px}
    .insight-card p{color:var(--muted);margin:0}
    .compare-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;height:100%;box-shadow:var(--shadow-sm)}
    .compare-panel.improved{background:var(--blue-deep);border-color:var(--blue-deep);color:#d8e8fa}
    .compare-panel.improved h3,.compare-panel.improved strong{color:#fff}
    .compare-panel h3{margin:0 0 20px}
    .compare-list{list-style:none;padding:0;margin:0}
    .compare-list li{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
    .compare-list li:last-child{border-bottom:0}
    .compare-list b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
    .improved .compare-list li{border-color:rgba(255,255,255,.16);color:#c1d4e9}
    .improved .compare-list b{color:#fff}
    .faq-wrap{max-width:930px;margin:auto}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:12px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:20px 22px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 22px 21px;color:var(--muted);font-size:14px}
    .cta-section{padding:78px 0}
    .cta-panel{background:#e8f3ff;border:1px solid #c6def5;border-radius:26px;padding:42px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    .required{color:#d96868}
    .focus-link:focus,.btn-main:focus,.btn-sub:focus,.phase:focus,.nav-link:focus{outline:3px solid rgba(54,184,199,.35);outline-offset:2px}
    @media(max-width:991px){.phase-wrap{margin:12px 0;justify-content:flex-start}.nav-contact{margin:6px 0}.hero-inner{padding-top:42px}.number-item{grid-template-columns:54px 1fr}.item-side{text-align:left;grid-column:2}}
    @media(max-width:767px){.hero-lead{font-size:16px}.hero-panel{margin-top:28px;padding:16px}.hero-panel img{height:220px}.floating-data{right:10px;bottom:12px}.metric{border-right:0;border-bottom:1px solid var(--line);padding:20px}.metric:nth-child(odd){border-right:1px solid var(--line)}.metric:last-child{border-bottom:0}.section{padding:57px 0}.section-head{display:block}.section-desc{margin-top:12px}.cta-panel{padding:27px 20px}}
    @media(max-width:520px){h1{font-size:35px}.btn-main,.btn-sub{width:100%;margin:5px 0}.number-item{grid-template-columns:42px 1fr;gap:12px}.number{font-size:22px}.metric:nth-child(odd){border-right:0}.footer-line{display:block}.footer-line div+div{margin-top:12px}}

/* roulang page: category2 */
:root{
      --blue:#1769d2;
      --blue-deep:#123d76;
      --blue-soft:#eaf3ff;
      --cyan:#36b8c7;
      --ink:#162b46;
      --muted:#64748b;
      --paper:#fff;
      --mist:#f4f8fc;
      --line:#dce7f2;
      --accent:#f2a84b;
      --radius:22px;
      --shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:68px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:22px;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .navbar-toggler{padding:8px}
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(23,105,210,.14)}
    .navbar-toggler-icon{width:22px;height:22px}
    .nav-link{font-size:14px;color:#4b617b!important;padding:9px 11px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .phase-wrap{display:flex;gap:6px;margin-left:auto;padding-left:13px}
    .phase{font-size:12px;color:#7b8da2;border:1px solid #d5e1ec;border-radius:20px;padding:4px 10px;white-space:nowrap}
    .phase:hover,.phase.active{background:var(--blue-soft);border-color:#a8c9ed;color:var(--blue)}
    .hero{padding:64px 0 52px;background:#fff;overflow:hidden}
    .hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.15em;color:var(--blue);font-weight:800}
    h1{font-size:clamp(36px,5vw,62px);line-height:1.15;letter-spacing:-.04em;color:var(--blue-deep);margin:14px 0 20px;font-weight:800}
    h2{font-size:clamp(26px,3vw,38px);line-height:1.25;letter-spacing:-.025em;color:var(--blue-deep);margin:9px 0 14px;font-weight:800}
    h3{color:var(--blue-deep)}
    .hero-lead{max-width:620px;color:#536b84;font-size:18px;line-height:1.9;margin-bottom:27px}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep);margin-left:8px}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .btn-main:focus,.btn-sub:focus,.nav-link:focus,.phase:focus,a:focus{outline:3px solid rgba(54,184,199,.35);outline-offset:3px}
    .hero-note{display:flex;gap:25px;flex-wrap:wrap;margin-top:24px;color:var(--muted);font-size:13px}
    .hero-note strong{display:block;color:var(--blue-deep);font-size:21px;line-height:1.3}
    .hero-visual{position:relative}
    .hero-visual img{width:100%;height:370px;object-fit:cover;border-radius:28px;box-shadow:var(--shadow)}
    .info-ticket{position:absolute;left:-25px;bottom:24px;background:#fff;border:1px solid var(--line);border-radius:17px;padding:16px 20px;box-shadow:var(--shadow-sm);font-size:13px;color:var(--muted)}
    .info-ticket b{display:block;color:var(--blue-deep);font-size:20px}
    .section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
    .section-desc{max-width:610px;color:var(--muted);margin:0}
    .metrics{margin-top:-1px;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .metric-row{display:grid;grid-template-columns:repeat(4,1fr)}
    .metric{padding:26px 25px;border-right:1px solid var(--line);position:relative}
    .metric:last-child{border-right:0}
    .metric:before{content:"";position:absolute;left:0;top:25px;width:3px;height:28px;background:var(--cyan);border-radius:5px}
    .metric small{display:block;color:var(--muted);font-size:13px}
    .metric strong{display:block;color:var(--blue-deep);font-size:32px;line-height:1.25;margin:2px 0}
    .metric em{font-size:12px;color:var(--blue);font-style:normal}
    .feature-band{background:#eef6fd}
    .schedule-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:28px;align-items:stretch}
    .side-panel,.schedule-list,.compare-panel,.faq-panel,.cta-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
    .side-panel{padding:30px;display:flex;flex-direction:column;justify-content:space-between}
    .side-panel img{height:180px;width:100%;object-fit:cover;border-radius:16px;margin-top:25px}
    .badge-soft,.status{display:inline-block;padding:5px 10px;border-radius:20px;font-size:12px;font-weight:700}
    .badge-soft{background:var(--blue-soft);color:var(--blue)}
    .status{background:#e7f8f3;color:#16816e}
    .schedule-list{overflow:hidden}
    .schedule-item{display:grid;grid-template-columns:92px 1fr auto;gap:20px;align-items:center;padding:23px 27px;border-bottom:1px solid var(--line)}
    .schedule-item:last-child{border-bottom:0}
    .schedule-date{color:var(--blue);font-weight:800;font-size:14px}
    .schedule-date b{display:block;color:var(--blue-deep);font-size:25px;line-height:1.2}
    .schedule-item h3{font-size:17px;margin:0 0 4px}
    .schedule-item p{color:var(--muted);font-size:13px;margin:0}
    .arrow{font-size:22px;color:#91abc5}
    .schedule-item:hover{background:#f8fbff}
    .matrix-grid{display:grid;grid-template-columns:1.3fr .85fr .85fr;grid-template-rows:1fr 1fr;gap:18px}
    .matrix-card{padding:27px;background:#fff;border:1px solid var(--line);border-radius:19px;box-shadow:var(--shadow-sm);transition:.25s ease}
    .matrix-card:first-child{grid-row:span 2;background:var(--blue-deep);color:#dcecff}
    .matrix-card:first-child h3{color:#fff;font-size:25px}
    .matrix-card h3{font-size:18px;margin:14px 0 8px}
    .matrix-card p{font-size:14px;color:var(--muted);margin:0}
    .matrix-card:first-child p{color:#c4d7ed}
    .matrix-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .matrix-num{color:var(--cyan);font-weight:800;letter-spacing:.08em}
    .compare-section{background:#fff}
    .compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-panel{padding:29px}
    .compare-panel.improved{background:#f0f7ff;border-color:#b9d5f0}
    .compare-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-weight:800;color:var(--blue-deep)}
    .compare-list{list-style:none;padding:0;margin:0}
    .compare-list li{padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
    .compare-list li:last-child{border-bottom:0}
    .compare-list b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
    .faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:38px;align-items:start}
    .faq-intro{padding:10px 0}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:12px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:19px 21px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 21px 20px;color:var(--muted);font-size:14px}
    .cta-section{padding:78px 0}
    .cta-panel{background:#e8f3ff;border-color:#c6def5;padding:40px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    .success-note{display:none;color:#157b67;font-size:14px;font-weight:700;margin-top:14px}
    @media(max-width:991px){
      .navbar-collapse{padding:16px 0 12px}
      .navbar-nav{align-items:stretch!important}
      .phase-wrap{margin:10px 0;padding:0;justify-content:flex-start}
      .nav-contact{display:inline-flex;width:max-content;margin:8px 0 0}
      .hero-grid,.schedule-layout,.faq-layout{grid-template-columns:1fr}
      .hero-visual{max-width:620px}
      .matrix-grid{grid-template-columns:1fr 1fr;grid-template-rows:auto}
      .matrix-card:first-child{grid-row:auto;grid-column:span 2}
    }
    @media(max-width:767px){
      .hero{padding:45px 0 35px}
      .hero-copy{padding:0}
      .hero-visual img{height:280px}
      .info-ticket{left:14px;bottom:14px}
      .metric-row{grid-template-columns:1fr 1fr}
      .metric{border-bottom:1px solid var(--line)}
      .metric:nth-child(2){border-right:0}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-desc{margin-top:12px}
      .schedule-item{grid-template-columns:70px 1fr;gap:13px;padding:19px}
      .schedule-item .arrow{display:none}
      .matrix-grid,.compare-grid{grid-template-columns:1fr}
      .matrix-card:first-child{grid-column:auto}
      .cta-panel{padding:27px 21px}
    }
    @media(max-width:520px){
      h1{font-size:36px}
      h2{font-size:28px}
      .hero-lead{font-size:16px}
      .btn-main,.btn-sub{width:100%;margin:6px 0 0}
      .metric{padding:21px 16px}
      .metric strong{font-size:27px}
      .phase-wrap{overflow-x:auto}
      .footer-line{display:block}
      .footer-line>div+div{margin-top:12px}
    }

/* roulang page: category3 */
:root{
      --blue:#1769d2;
      --blue-deep:#123d76;
      --blue-soft:#eaf3ff;
      --cyan:#36b8c7;
      --ink:#162b46;
      --muted:#64748b;
      --paper:#fff;
      --mist:#f4f8fc;
      --line:#dce7f2;
      --accent:#f2a84b;
      --radius:22px;
      --shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:72px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:22px;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .navbar-toggler{padding:7px 9px}
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(23,105,210,.14)}
    .navbar-toggler-icon{filter:invert(25%) sepia(70%) saturate(1100%) hue-rotate(180deg)}
    .nav-link{font-size:14px;color:#4b617b!important;padding:8px 11px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .phase-wrap{display:flex;gap:6px;margin-left:auto;padding-left:12px}
    .phase{font-size:12px;color:#7890a8;border:1px solid #d5e2ee;border-radius:20px;padding:4px 10px;white-space:nowrap}
    .phase:hover,.phase.active{color:var(--blue);border-color:#9bc4ed;background:var(--blue-soft)}
    .hero-guide{padding:72px 0 64px;background:#fff;position:relative;overflow:hidden}
    .hero-guide:after{content:"";position:absolute;width:380px;height:380px;border-radius:50%;background:#edf6ff;right:-130px;top:-150px;z-index:0}
    .hero-guide .container{position:relative;z-index:1}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--blue);font-weight:800}
    h1{font-size:clamp(38px,5vw,64px);line-height:1.18;letter-spacing:-.04em;color:var(--blue-deep);margin:14px 0 22px;font-weight:800}
    h2{font-size:clamp(28px,3vw,40px);line-height:1.3;color:var(--blue-deep);font-weight:800;margin:8px 0 16px}
    h3{color:var(--blue-deep);font-size:19px;font-weight:800}
    .hero-lead{max-width:650px;color:#536b84;font-size:18px;line-height:1.9;margin-bottom:28px}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep);margin-left:8px}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .btn-main:focus,.btn-sub:focus,.phase:focus,.nav-link:focus{outline:3px solid rgba(54,184,199,.35);outline-offset:3px}
    .guide-panel{background:#f6faff;border:1px solid var(--line);border-radius:26px;padding:25px;box-shadow:var(--shadow);position:relative}
    .panel-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
    .mini-label,.badge-soft{font-size:12px;color:var(--blue);background:var(--blue-soft);border-radius:20px;padding:5px 10px;font-weight:700}
    .signal{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px}
    .signal i{width:8px;height:8px;background:#43c48a;border-radius:50%;display:inline-block}
    .guide-panel img{width:100%;height:205px;object-fit:cover;border-radius:17px}
    .panel-stat{display:flex;justify-content:space-between;align-items:end;padding-top:18px}
    .panel-stat strong{font-size:37px;line-height:1;color:var(--blue-deep)}
    .panel-stat span{color:var(--muted);font-size:13px}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-desc{max-width:610px;color:var(--muted);margin:0}
    .metric-strip{margin-top:-1px;background:#edf6ff;border-top:1px solid #d9e9f7;border-bottom:1px solid #d9e9f7;padding:24px 0}
    .metric{padding:6px 24px;border-right:1px solid #cfe0ef}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:30px;line-height:1.2;color:var(--blue-deep)}
    .metric span{font-size:13px;color:var(--muted)}
    .timeline{position:relative;padding-left:34px}
    .timeline:before{content:"";position:absolute;left:9px;top:9px;bottom:10px;width:2px;background:#c7dff4}
    .timeline-item{position:relative;padding:0 0 30px 24px}
    .timeline-item:last-child{padding-bottom:0}
    .timeline-item:before{content:"";position:absolute;left:-1px;top:7px;width:20px;height:20px;border:5px solid #fff;border-radius:50%;background:var(--blue);box-shadow:0 0 0 2px #aad0f2}
    .timeline-item.current:before{background:var(--cyan);box-shadow:0 0 0 4px #c9f1f3}
    .timeline-meta{font-size:12px;color:var(--blue);font-weight:800;margin-bottom:4px}
    .timeline-item p{color:var(--muted);margin:5px 0 0}
    .scene-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px}
    .scene-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:25px;box-shadow:var(--shadow-sm);transition:.25s ease}
    .scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .scene-card.large{grid-row:span 2;padding:0;overflow:hidden}
    .scene-card.large img{height:260px;width:100%;object-fit:cover}
    .scene-content{padding:25px}
    .scene-card p{color:var(--muted);font-size:14px;margin:8px 0 0}
    .faq-wrap{max-width:960px;margin:auto}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:12px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:20px 22px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 22px 21px;color:var(--muted);font-size:14px}
    .cta-section{padding:78px 0}
    .cta-panel{background:#e8f3ff;border:1px solid #c6def5;border-radius:26px;padding:42px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    @media(max-width:991px){
      .phase-wrap{margin:14px 0 8px;padding-left:0}
      .nav-contact{margin:5px 0 12px;display:inline-flex}
      .hero-guide{padding-top:48px}
      .metric{padding:8px 15px}
    }
    @media(max-width:767px){
      .section{padding:58px 0}
      .section-head{display:block}
      .section-desc{margin-top:12px}
      .hero-lead{font-size:16px}
      .btn-main,.btn-sub{width:100%;margin:5px 0}
      .metric{border-right:0;border-bottom:1px solid #cfe0ef;padding:14px 5px}
      .metric:last-child{border-bottom:0}
      .scene-grid{grid-template-columns:1fr}
      .scene-card.large{grid-row:auto}
      .cta-panel{padding:27px 20px}
      .footer-line{display:block}
      .footer-line div+div{margin-top:12px}
    }

/* roulang page: category5 */
:root{
      --blue:#1769d2;
      --blue-deep:#123d76;
      --blue-soft:#eaf3ff;
      --cyan:#36b8c7;
      --ink:#162b46;
      --muted:#64748b;
      --paper:#fff;
      --mist:#f4f8fc;
      --line:#dce7f2;
      --accent:#f2a84b;
      --radius:22px;
      --shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08);
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:68px}
    .brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:800;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .nav-link{font-size:14px;color:#4b617b!important;padding:9px 12px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .phase-wrap{display:flex;gap:6px;margin-left:auto;padding:0 8px}
    .phase{font-size:12px;color:#71839a;border:1px solid #d3e0ec;border-radius:20px;padding:4px 10px;white-space:nowrap}
    .phase:hover,.phase.active{background:var(--blue-soft);border-color:#b8d3ef;color:var(--blue)}
    .hero{padding:52px 0 45px;background:#fff;position:relative;overflow:hidden}
    .hero:after{content:"";position:absolute;right:-100px;top:-160px;width:420px;height:420px;border:1px solid #d8eaff;border-radius:50%;opacity:.8}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.15em;color:var(--blue);font-weight:800;text-transform:uppercase}
    h1{font-size:clamp(34px,5vw,62px);line-height:1.16;letter-spacing:-.04em;color:var(--blue-deep);margin:14px 0 18px;font-weight:800}
    h2{font-size:clamp(26px,3vw,38px);line-height:1.3;color:var(--blue-deep);font-weight:800;margin:8px 0 14px}
    h3{color:var(--blue-deep);font-size:19px;font-weight:800}
    .hero-lead{max-width:650px;color:#536b84;font-size:17px;line-height:1.9;margin-bottom:26px}
    .hero-visual{position:relative;z-index:1}
    .hero-visual img{width:100%;height:300px;object-fit:cover;border-radius:24px;box-shadow:var(--shadow)}
    .hero-panel{position:absolute;left:-22px;bottom:22px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px 19px;box-shadow:var(--shadow-sm);min-width:190px}
    .hero-panel b{display:block;font-size:25px;line-height:1.3;color:var(--blue)}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep);margin-left:8px}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .btn-main:focus,.btn-sub:focus,.nav-link:focus,.phase:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{outline:3px solid rgba(54,184,199,.35);outline-offset:2px}
    .section{padding:76px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
    .section-desc{max-width:590px;color:var(--muted);margin:0}
    .metrics{margin-top:-1px;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .metric-row{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:0}
    .metric{padding:27px 25px;border-right:1px solid var(--line)}
    .metric:last-child{border-right:0}
    .metric small{display:block;color:var(--muted);font-size:12px;margin-bottom:7px}
    .metric strong{font-size:29px;color:var(--blue-deep);line-height:1.2}
    .metric span{display:block;color:var(--muted);font-size:12px;margin-top:5px}
    .overview-box{background:var(--blue-deep);border-radius:24px;color:#d8e7f7;padding:33px;min-height:100%;box-shadow:var(--shadow)}
    .overview-box h2{color:#fff}
    .overview-box p{margin:0;color:#c5d7e9}
    .overview-box .mini-line{margin-top:26px;padding-top:17px;border-top:1px solid rgba(255,255,255,.18);font-size:13px}
    .compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow-sm)}
    .compare-panel.improved{background:#f0f7ff;border-color:#bfd9f2}
    .compare-title{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:10px;color:var(--blue-deep);font-weight:800}
    .status{font-size:11px;padding:4px 9px;border-radius:20px;background:#edf1f5;color:#718096}
    .improved .status{background:#d9edff;color:var(--blue)}
    .compare-list{list-style:none;padding:0;margin:0}
    .compare-list li{padding:13px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .compare-list li:last-child{border-bottom:0}
    .compare-list b{display:block;color:var(--ink);font-size:15px;margin-bottom:3px}
    .matrix-wrap{background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:var(--shadow-sm)}
    .matrix-row{display:grid;grid-template-columns:1.1fr 1.5fr 1fr 1.1fr;align-items:stretch;border-bottom:1px solid var(--line)}
    .matrix-row:last-child{border-bottom:0}
    .matrix-row>div{padding:18px 20px;border-right:1px solid var(--line);font-size:14px}
    .matrix-row>div:last-child{border-right:0}
    .matrix-head{background:#edf6ff;color:var(--blue-deep);font-size:12px!important;font-weight:800;text-transform:uppercase}
    .matrix-row:not(.matrix-head):hover{background:#f8fbff}
    .matrix-label{font-weight:800;color:var(--blue-deep)}
    .badge-soft{display:inline-block;padding:4px 9px;border-radius:20px;background:var(--blue-soft);color:var(--blue);font-size:12px}
    .faq-layout{display:grid;grid-template-columns:.8fr 1.5fr;gap:55px;align-items:start}
    .faq-note{color:var(--muted)}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:12px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:20px 22px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 22px 21px;color:var(--muted);font-size:14px}
    .cta-section{padding:78px 0}
    .cta-panel{background:#e8f3ff;border:1px solid #c6def5;border-radius:26px;padding:42px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    @media(max-width:991px){
      .navbar-nav{padding:15px 0}
      .phase-wrap{margin:5px 0 12px;padding:0;justify-content:flex-start}
      .nav-contact{display:inline-flex;margin-left:0}
      .hero{padding-top:35px}
      .hero-visual{margin-top:28px}
      .metric-row{grid-template-columns:repeat(2,1fr)}
      .metric:nth-child(2){border-right:0}
      .metric:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .faq-layout{grid-template-columns:1fr;gap:25px}
    }
    @media(max-width:767px){
      .section{padding:56px 0}
      .section-head{display:block;margin-bottom:24px}
      .section-desc{margin-top:12px}
      h1{font-size:38px}
      .hero-visual img{height:240px}
      .hero-panel{left:12px;bottom:12px}
      .metric{padding:21px 15px}
      .metric strong{font-size:24px}
      .compare-grid{grid-template-columns:1fr}
      .matrix-wrap{overflow-x:auto}
      .matrix-row{min-width:680px}
      .cta-panel{padding:27px 20px}
    }
    @media(max-width:520px){
      .brand{font-size:20px}
      .btn-main,.btn-sub{width:100%;margin:0 0 10px}
      .hero-lead{font-size:16px}
      .metric-row{grid-template-columns:1fr 1fr}
      .metric small{font-size:11px}
      .metric strong{font-size:21px}
      .overview-box,.compare-panel{padding:23px}
    }

/* roulang page: category4 */
:root{
      --blue:#1769d2;
      --blue-deep:#123d76;
      --blue-soft:#eaf3ff;
      --cyan:#36b8c7;
      --ink:#162b46;
      --muted:#64748b;
      --paper:#fff;
      --mist:#f4f8fc;
      --line:#dce7f2;
      --accent:#f2a84b;
      --radius:22px;
      --shadow:0 18px 45px rgba(34,77,127,.10);
      --shadow-sm:0 8px 22px rgba(34,77,127,.08);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--mist);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,67,110,.04)}
    .navbar{min-height:72px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:23px;letter-spacing:.02em;color:var(--blue-deep)}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;display:inline-block;box-shadow:0 7px 15px rgba(23,105,210,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:4px;transform:rotate(35deg)}
    .brand-mark:before{width:7px;height:22px;left:10px;top:6px}
    .brand-mark:after{width:7px;height:14px;right:7px;top:10px;opacity:.7}
    .navbar-toggler{padding:8px;border-radius:10px}
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(23,105,210,.14)}
    .navbar-toggler-icon{width:1.35em;height:1.35em}
    .nav-link{font-size:14px;color:#4b617b!important;padding:9px 11px!important;border-radius:10px}
    .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)!important}
    .nav-contact{background:var(--blue);color:#fff!important;padding:9px 16px!important;border-radius:10px;margin-left:10px}
    .nav-contact:hover{background:var(--blue-deep);color:#fff!important}
    .phase-wrap{display:flex;align-items:center;gap:6px;margin-left:auto;padding-left:12px}
    .phase{font-size:12px;color:#71849a;border:1px solid #cbdbea;border-radius:20px;padding:4px 10px;white-space:nowrap}
    .phase:hover,.phase.active{background:var(--blue-soft);border-color:#a9c9eb;color:var(--blue)}
    .hero-inner{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--line)}
    .hero-banner{min-height:460px;display:flex;align-items:center;background-image:linear-gradient(90deg,rgba(255,255,255,.98) 0%,rgba(255,255,255,.9) 43%,rgba(255,255,255,.2) 100%),url('/assets/images/backpic/back-2.webp');background-position:center;background-size:cover}
    .hero-copy{max-width:650px;padding:72px 0}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.15em;color:var(--blue);font-weight:800}
    h1,h2,h3{color:var(--blue-deep);font-weight:800;letter-spacing:-.025em}
    h1{font-size:clamp(2.25rem,5vw,4.35rem);line-height:1.12;margin:15px 0 20px}
    h2{font-size:clamp(1.75rem,3vw,2.6rem);line-height:1.25;margin:8px 0 14px}
    h3{font-size:1.1rem;line-height:1.4}
    .hero-lead{max-width:610px;color:#536b84;font-size:18px;line-height:1.9;margin-bottom:28px}
    .hero-actions{display:flex;gap:10px;flex-wrap:wrap}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:12px;font-weight:700;border:1px solid transparent;transition:.25s ease}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(23,105,210,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
    .btn-main:focus,.btn-sub:focus,.nav-link:focus,.phase:focus{outline:3px solid rgba(54,184,199,.35);outline-offset:2px}
    .btn-sub{background:#fff;border-color:#b9d0e8;color:var(--blue-deep)}
    .btn-sub:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
    .hero-meta{display:flex;gap:24px;flex-wrap:wrap;margin-top:27px;color:var(--muted);font-size:13px}
    .hero-meta strong{display:block;color:var(--blue-deep);font-size:21px;line-height:1.3}
    .status-strip{position:absolute;bottom:20px;right:5%;display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:12px 16px;box-shadow:var(--shadow-sm);font-size:13px;color:var(--muted)}
    .status-dot{width:9px;height:9px;background:#35b779;border-radius:50%;box-shadow:0 0 0 5px rgba(53,183,121,.12)}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:32px}
    .section-desc{max-width:590px;color:var(--muted);margin:0}
    .soft-section{background:#edf5fc}
    .metric-panel{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow-sm);padding:10px;display:grid;grid-template-columns:repeat(4,1fr)}
    .metric-item{padding:25px 26px;border-right:1px solid var(--line);position:relative}
    .metric-item:last-child{border-right:0}
    .metric-item:before{content:"";position:absolute;top:16px;left:26px;width:28px;height:3px;background:var(--cyan);border-radius:4px}
    .metric-label{display:block;color:var(--muted);font-size:13px;margin-top:16px}
    .metric-number{display:block;color:var(--blue-deep);font-size:32px;font-weight:800;line-height:1.2;margin:5px 0}
    .metric-note{font-size:12px;color:#8293a6}
    .service-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}
    .service-main,.service-side,.problem-card,.result-panel,.form-panel,.faq-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
    .service-main{padding:34px}
    .service-side{padding:26px;background:var(--blue-deep);color:#d5e6f8}
    .service-side h3{color:#fff}
    .module-list{list-style:none;padding:0;margin:22px 0 0}
    .module-list li{display:grid;grid-template-columns:42px 1fr auto;gap:16px;align-items:start;padding:20px 0;border-top:1px solid var(--line)}
    .module-no{width:31px;height:31px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:12px}
    .module-list h3{margin:0 0 4px}
    .module-list p{margin:0;color:var(--muted);font-size:14px}
    .arrow-link{color:var(--blue);font-weight:700;font-size:13px;white-space:nowrap}
    .side-stat{border-top:1px solid rgba(255,255,255,.18);padding-top:18px;margin-top:24px}
    .side-stat strong{font-size:31px;color:#fff;display:block}
    .side-tag{display:inline-block;background:rgba(255,255,255,.12);color:#d9f2ff;border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:4px 9px;font-size:12px;margin-bottom:19px}
    .problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .problem-card{padding:25px;min-height:205px}
    .problem-card .tag{display:inline-block;color:var(--blue);background:var(--blue-soft);border-radius:20px;padding:4px 10px;font-size:12px;margin-bottom:16px}
    .problem-card p{color:var(--muted);font-size:14px;margin:0}
    .result-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:20px;align-items:stretch}
    .result-panel{padding:30px}
    .result-panel.blue{background:#eaf3ff;border-color:#c8def4}
    .result-panel h3{margin-bottom:20px}
    .result-list{list-style:none;padding:0;margin:0}
    .result-list li{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .result-list li:last-child{border-bottom:0}
    .result-list b{color:var(--ink)}
    .result-list .good{color:#18805a;font-weight:700}
    .faq-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:35px;align-items:start}
    .faq-intro{padding:15px 0}
    .faq-intro p{color:var(--muted);max-width:370px}
    .faq-panel{padding:10px}
    .accordion-item{border:1px solid var(--line)!important;border-radius:13px!important;margin-bottom:10px;overflow:hidden;background:#fff}
    .accordion-item:last-child{margin-bottom:0}
    .accordion-button{font-weight:700;color:var(--blue-deep);padding:19px 20px;background:#fff;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue)}
    .accordion-body{padding:0 20px 20px;color:var(--muted);font-size:14px}
    .cta-section{padding:82px 0}
    .form-panel{background:#e8f3ff;border-color:#c6def5;padding:40px}
    .form-panel h2{margin-top:4px}
    .form-intro{color:var(--muted);max-width:580px}
    .form-control,.form-select{border:1px solid #cbdbea;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fff;min-height:48px}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,210,.12)}
    .form-label{font-size:13px;font-weight:700;color:var(--blue-deep);margin-bottom:7px}
    textarea.form-control{min-height:130px;resize:vertical}
    .form-tip{font-size:13px;color:var(--muted);margin-top:15px}
    .footer{background:#112a4b;color:#b9cadc;padding:50px 0 22px}
    .footer .brand{color:#fff;margin-bottom:15px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    .footer a{font-size:13px;color:#b9cadc;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-line{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .footer-phases{display:flex;gap:7px;flex-wrap:wrap}
    .footer-phases span{border:1px solid rgba(255,255,255,.2);padding:3px 9px;border-radius:20px;font-size:11px}
    @media(max-width:991.98px){
      .navbar-nav{padding:15px 0 8px}
      .phase-wrap{margin:8px 0;justify-content:flex-start;padding-left:0}
      .nav-contact{display:inline-flex;margin:8px 0 16px}
      .hero-banner{background-position:62% center}
      .service-layout,.result-layout,.faq-grid{grid-template-columns:1fr}
      .metric-panel{grid-template-columns:repeat(2,1fr)}
      .metric-item:nth-child(2){border-right:0}
      .metric-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
    }
    @media(max-width:767.98px){
      .section,.cta-section{padding:58px 0}
      .hero-copy{padding:55px 0 75px}
      .hero-lead{font-size:16px}
      h1{font-size:2.4rem}
      .status-strip{left:18px;right:auto;bottom:16px}
      .section-head{display:block}
      .section-desc{margin-top:12px}
      .problem-grid{grid-template-columns:1fr}
      .service-main,.service-side,.result-panel,.form-panel{padding:25px}
      .module-list li{grid-template-columns:36px 1fr}
      .module-list .arrow-link{grid-column:2}
      .metric-item{padding:20px 15px}
      .metric-item:before{left:15px}
      .metric-number{font-size:27px}
    }
    @media(max-width:520px){
      body{font-size:14px}
      .brand{font-size:21px}
      .metric-panel{grid-template-columns:1fr 1fr}
      .metric-item{min-width:0}
      .hero-actions .btn-main,.hero-actions .btn-sub{width:100%;margin:0}
      .phase-wrap{overflow-x:auto;max-width:100%;padding-bottom:3px}
      .phase{flex:0 0 auto}
      .footer-line{display:block}
      .footer-line>div+div{margin-top:12px}
    }