/* roulang page: index */
:root{
      --brand:#1f5fbf;
      --brand-deep:#174a96;
      --brand-soft:#eaf2ff;
      --accent:#58a6ff;
      --accent-warm:#f5b96a;
      --bg:#f6f9fd;
      --surface:#ffffff;
      --surface-2:#f2f7fd;
      --line:#d9e4f2;
      --text:#18324d;
      --muted:#5e718a;
      --shadow:0 10px 30px rgba(25, 61, 106, .08);
      --shadow-hover:0 14px 36px rgba(25, 61, 106, .12);
      --radius:12px;
      --radius-sm:8px;
      --container:1180px;
      --gap:24px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(31,95,191,.08), transparent 28%),
        radial-gradient(circle at right top, rgba(88,166,255,.08), transparent 22%),
        linear-gradient(180deg,#fbfdff 0%,#f6f9fd 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    .container-custom{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{
      background:rgba(18,48,89,.96);
      color:#dce8f7;
      font-size:.92rem;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .topbar-inner{
      min-height:40px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:8px 0;
    }
    .topbar .mini-link{
      color:#fff;
      font-weight:600;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      transition:.2s ease;
    }
    .topbar .mini-link:hover{background:rgba(255,255,255,.14);transform:translateY(-1px)}
    .site-header{
      position:sticky;
      top:0;
      z-index:1020;
      backdrop-filter:saturate(160%) blur(12px);
      background:rgba(246,249,253,.88);
      border-bottom:1px solid rgba(217,228,242,.75);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:14px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
      font-weight:800;
      color:var(--text);
      letter-spacing:.2px;
    }
    .brand-mark{
      width:40px;height:40px;
      border-radius:10px;
      background:linear-gradient(135deg,var(--brand),#3f86e8);
      box-shadow:0 8px 20px rgba(31,95,191,.18);
      display:grid;
      place-items:center;
      color:#fff;
      flex:0 0 auto;
    }
    .brand-title{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-title strong{font-size:1.02rem}
    .brand-title span{font-size:.82rem;color:var(--muted);font-weight:500;margin-top:4px}
    .navbar-nav{
      gap:6px;
      align-items:center;
    }
    .nav-link-custom{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:10px 14px;
      border-radius:999px;
      color:var(--text);
      font-weight:600;
      transition:.2s ease;
    }
    .nav-link-custom:hover,
    .nav-link-custom:focus-visible,
    .nav-link-custom.active{
      background:var(--brand-soft);
      color:var(--brand-deep);
    }
    .nav-actions{
      display:flex;
      align-items:center;
      gap:10px;
      flex-shrink:0;
    }
    .btn-ghost,
    .btn-primary-custom{
      border:1px solid transparent;
      border-radius:999px;
      padding:11px 16px;
      font-weight:700;
      display:inline-flex;
      align-items:center;
      gap:8px;
      transition:.22s ease;
      min-height:44px;
    }
    .btn-primary-custom{
      background:var(--brand);
      color:#fff;
      box-shadow:0 10px 18px rgba(31,95,191,.14);
    }
    .btn-primary-custom:hover,
    .btn-primary-custom:focus-visible{
      background:var(--brand-deep);
      transform:translateY(-1px);
      box-shadow:0 14px 24px rgba(31,95,191,.18);
      color:#fff;
    }
    .btn-ghost{
      background:#fff;
      color:var(--brand-deep);
      border-color:var(--line);
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible{
      border-color:#c6d7ed;
      background:#f8fbff;
      transform:translateY(-1px);
      color:var(--brand-deep);
    }
    .navbar-toggler{
      border:1px solid var(--line);
      border-radius:10px;
      padding:.58rem .72rem;
      background:#fff;
      box-shadow:0 4px 12px rgba(14,38,74,.04);
    }
    .navbar-toggler:focus{box-shadow:0 0 0 .18rem rgba(31,95,191,.16)}
    .hero{
      padding:30px 0 18px;
    }
    .hero-shell{
      background:
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(245,249,254,.96)),
        var(--surface);
      border:1px solid rgba(217,228,242,.9);
      border-radius:18px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-shell::before{
      content:"";
      position:absolute;
      inset:auto -12% -18% auto;
      width:320px;
      height:320px;
      background:radial-gradient(circle, rgba(88,166,255,.13), transparent 65%);
      pointer-events:none;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.25fr .95fr;
      gap:0;
      padding:30px;
      align-items:stretch;
    }
    .hero-copy{
      padding-right:16px;
      display:flex;
      flex-direction:column;
      justify-content:center;
      gap:18px;
    }
    .eyebrow-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 11px;
      border-radius:999px;
      background:var(--brand-soft);
      color:var(--brand-deep);
      font-size:.88rem;
      font-weight:700;
      border:1px solid rgba(31,95,191,.08);
    }
    .tag.soft{
      background:#f3f7fb;
      color:#49627e;
    }
    .hero h1{
      margin:0;
      font-size:clamp(2rem,4vw,3.9rem);
      line-height:1.08;
      letter-spacing:-.02em;
      font-weight:900;
      max-width:12ch;
    }
    .hero-lead{
      margin:0;
      font-size:1.03rem;
      color:var(--muted);
      max-width:62ch;
    }
    .hero-cta{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      align-items:center;
    }
    .hero-data{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .data-pill{
      min-width:124px;
      border:1px solid var(--line);
      background:#fff;
      border-radius:14px;
      padding:12px 14px;
      box-shadow:0 8px 18px rgba(20,50,88,.04);
    }
    .data-pill strong{
      display:block;
      font-size:1.08rem;
      color:var(--brand-deep);
      line-height:1.2;
    }
    .data-pill span{
      color:var(--muted);
      font-size:.86rem;
    }
    .hero-bento{
      display:grid;
      grid-template-columns:1fr 1fr;
      grid-template-rows:auto auto auto;
      gap:14px;
      align-content:stretch;
    }
    .bento-card{
      background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid var(--line);
      border-radius:16px;
      padding:18px;
      box-shadow:0 10px 20px rgba(19,47,82,.05);
      transition:.22s ease;
      height:100%;
    }
    .bento-card:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow-hover);
      border-color:#cad8ea;
    }
    .bento-card.large{
      grid-column:1 / -1;
      min-height:168px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      background:
        linear-gradient(135deg, rgba(31,95,191,.08), rgba(255,255,255,.95)),
        #fff;
    }
    .bento-card h3,
    .section-title h2{
      margin:0;
      font-weight:800;
      letter-spacing:-.01em;
    }
    .bento-card h3{font-size:1.05rem}
    .bento-card p{
      margin:.45rem 0 0;
      color:var(--muted);
      font-size:.95rem;
    }
    .meter{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      margin-top:14px;
    }
    .meter-bar{
      height:8px;
      border-radius:999px;
      background:#e5edf8;
      overflow:hidden;
      flex:1;
    }
    .meter-bar span{
      display:block;
      height:100%;
      width:78%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--brand),#5ea0ff);
    }
    .tags-wall{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mini-stat{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      border:1px solid var(--line);
      border-radius:14px;
      padding:14px 16px;
      background:#fff;
    }
    .mini-stat strong{
      display:block;
      font-size:1.05rem;
      color:var(--brand-deep);
    }
    .mini-stat span{
      display:block;
      color:var(--muted);
      font-size:.84rem;
    }
    .section{
      padding:18px 0 8px;
    }
    .section-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(217,228,242,.95);
      border-radius:18px;
      box-shadow:var(--shadow);
      padding:28px;
    }
    .section-title{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
      flex-wrap:wrap;
    }
    .section-title h2{
      font-size:clamp(1.35rem,2vw,2rem);
    }
    .section-title p{
      margin:0;
      color:var(--muted);
      max-width:60ch;
    }
    .intro-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:18px;
    }
    .intro-panel{
      background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid var(--line);
      border-radius:16px;
      padding:20px;
      box-shadow:0 10px 18px rgba(17,38,69,.04);
    }
    .intro-panel h3{
      margin:0 0 10px;
      font-size:1.08rem;
      font-weight:800;
    }
    .intro-panel p{
      margin:0;
      color:var(--muted);
    }
    .feature-list{
      display:grid;
      gap:12px;
      margin-top:14px;
    }
    .feature-item{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:14px;
      border-radius:14px;
      background:#fff;
      border:1px solid var(--line);
    }
    .feature-icon{
      width:40px;
      height:40px;
      border-radius:12px;
      background:var(--brand-soft);
      color:var(--brand-deep);
      display:grid;
      place-items:center;
      flex:0 0 auto;
    }
    .feature-item strong{
      display:block;
      margin-bottom:2px;
      font-size:.98rem;
    }
    .feature-item span{
      display:block;
      color:var(--muted);
      font-size:.92rem;
    }
    .hot-grid{
      display:grid;
      grid-template-columns:repeat(12,1fr);
      gap:16px;
    }
    .hot-card{
      grid-column:span 3;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      padding:18px;
      box-shadow:0 10px 18px rgba(16,38,70,.04);
      height:100%;
      transition:.22s ease;
    }
    .hot-card:hover{
      transform:translateY(-3px);
      border-color:#cddcf0;
      box-shadow:var(--shadow-hover);
    }
    .hot-card .label{
      display:inline-flex;
      align-items:center;
      gap:6px;
      font-size:.84rem;
      color:var(--brand-deep);
      background:var(--brand-soft);
      border-radius:999px;
      padding:6px 10px;
      font-weight:700;
      margin-bottom:10px;
    }
    .hot-card h3{
      margin:0 0 8px;
      font-size:1.02rem;
      line-height:1.4;
      font-weight:800;
    }
    .hot-card p{
      margin:0;
      color:var(--muted);
      font-size:.93rem;
      min-height:56px;
    }
    .hot-card .card-link{
      margin-top:14px;
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--brand-deep);
      font-weight:700;
    }
    .stack-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:start;
    }
    .stack-list{
      display:grid;
      gap:12px;
    }
    .stack-item{
      display:flex;
      justify-content:space-between;
      gap:16px;
      align-items:flex-start;
      padding:16px 18px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      transition:.2s ease;
    }
    .stack-item:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow);
      border-color:#cddcf0;
    }
    .stack-item h4{
      margin:0 0 5px;
      font-size:1rem;
      font-weight:800;
    }
    .stack-item p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }
    .stack-meta{
      white-space:nowrap;
      color:var(--brand-deep);
      font-weight:700;
      font-size:.9rem;
    }
    .recommend{
      background:linear-gradient(180deg,#fbfdff,#f4f8fd);
      border:1px solid var(--line);
      border-radius:18px;
      padding:20px;
      box-shadow:0 10px 18px rgba(16,38,70,.04);
      position:sticky;
      top:106px;
    }
    .recommend .badge-soft{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 10px;
      border-radius:999px;
      background:#eef5ff;
      color:var(--brand-deep);
      font-weight:700;
      font-size:.84rem;
    }
    .recommend h3{
      margin:12px 0 10px;
      font-size:1.18rem;
      font-weight:800;
    }
    .recommend p{
      margin:0;
      color:var(--muted);
    }
    .recommend .bullet{
      display:grid;
      gap:10px;
      margin:16px 0 0;
      padding:0;
      list-style:none;
    }
    .recommend .bullet li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--text);
      background:#fff;
      border:1px solid var(--line);
      border-radius:12px;
      padding:11px 12px;
    }
    .recommend .bullet i{
      color:var(--brand-deep);
      flex:0 0 auto;
      margin-top:2px;
    }
    .quote-row{
      display:flex;
      gap:12px;
      overflow:auto;
      padding-bottom:8px;
      scroll-snap-type:x mandatory;
    }
    .quote-card{
      min-width:260px;
      flex:0 0 260px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      padding:16px;
      box-shadow:0 10px 18px rgba(16,38,70,.04);
      scroll-snap-align:start;
    }
    .quote-head{
      display:flex;
      align-items:center;
      gap:10px;
      margin-bottom:10px;
    }
    .avatar{
      width:38px;
      height:38px;
      border-radius:50%;
      background:linear-gradient(135deg,#d8e7fb,#fdfefe);
      border:1px solid #d3def0;
      display:grid;
      place-items:center;
      color:var(--brand-deep);
      font-weight:800;
      flex:0 0 auto;
    }
    .quote-head strong{
      display:block;
      font-size:.98rem;
    }
    .quote-head span{
      display:block;
      color:var(--muted);
      font-size:.84rem;
    }
    .quote-card p{
      margin:0;
      color:var(--text);
      font-size:.93rem;
    }
    .stars{
      color:#efb14a;
      letter-spacing:1px;
      font-size:.9rem;
      margin-top:10px;
    }
    .latest-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
    }
    .link-list{
      display:grid;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .link-list li a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:14px 16px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      transition:.2s ease;
    }
    .link-list li a:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow);
      border-color:#cddcf0;
    }
    .link-list .link-meta{
      color:var(--muted);
      font-size:.88rem;
      white-space:nowrap;
    }
    .side-card{
      background:linear-gradient(180deg,#ffffff,#f7fbff);
      border:1px solid var(--line);
      border-radius:18px;
      padding:20px;
      box-shadow:0 10px 18px rgba(16,38,70,.04);
    }
    .side-card h3{
      margin:0 0 10px;
      font-size:1.12rem;
      font-weight:800;
    }
    .side-card p{
      margin:0 0 14px;
      color:var(--muted);
    }
    .side-grid{
      display:grid;
      gap:12px;
    }
    .side-tile{
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      padding:14px;
      display:flex;
      gap:12px;
      align-items:flex-start;
    }
    .side-tile .dot{
      width:12px;height:12px;border-radius:50%;
      background:linear-gradient(135deg,var(--brand),#6fa8ff);
      margin-top:6px;
      flex:0 0 auto;
    }
    .side-tile strong{
      display:block;
      margin-bottom:4px;
      font-size:.98rem;
    }
    .side-tile span{
      color:var(--muted);
      font-size:.9rem;
    }
    .cta-band{
      background:linear-gradient(135deg, rgba(31,95,191,.95), rgba(77,139,232,.96));
      color:#fff;
      border-radius:18px;
      padding:28px;
      overflow:hidden;
      position:relative;
    }
    .cta-band::after{
      content:"";
      position:absolute;
      right:-18px;
      top:-18px;
      width:180px;
      height:180px;
      border-radius:50%;
      background:rgba(255,255,255,.12);
    }
    .cta-band h2{
      margin:0 0 10px;
      font-size:clamp(1.5rem,2.4vw,2.35rem);
      font-weight:900;
    }
    .cta-band p{
      margin:0;
      color:rgba(255,255,255,.92);
      max-width:62ch;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:18px;
    }
    .btn-white{
      background:#fff;
      color:var(--brand-deep);
      border-radius:999px;
      padding:12px 16px;
      font-weight:800;
      border:1px solid rgba(255,255,255,.25);
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:44px;
      transition:.22s ease;
    }
    .btn-white:hover,
    .btn-white:focus-visible{
      transform:translateY(-1px);
      color:var(--brand-deep);
      box-shadow:0 12px 22px rgba(0,0,0,.12);
    }
    .btn-soft{
      background:rgba(255,255,255,.12);
      color:#fff;
      border:1px solid rgba(255,255,255,.22);
      border-radius:999px;
      padding:12px 16px;
      font-weight:800;
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:44px;
      transition:.22s ease;
    }
    .btn-soft:hover,
    .btn-soft:focus-visible{
      background:rgba(255,255,255,.2);
      color:#fff;
      transform:translateY(-1px);
    }
    .faq .accordion{
      --bs-accordion-border-color:var(--line);
      --bs-accordion-border-radius:14px;
      --bs-accordion-inner-border-radius:14px;
      --bs-accordion-btn-padding-y:1rem;
      --bs-accordion-btn-padding-x:1.1rem;
      --bs-accordion-active-bg:#eff5ff;
      --bs-accordion-active-color:var(--brand-deep);
      --bs-accordion-btn-focus-box-shadow:0 0 0 .18rem rgba(31,95,191,.14);
      --bs-accordion-bg:#fff;
    }
    .accordion-item{
      border-radius:14px;
      overflow:hidden;
      box-shadow:0 8px 18px rgba(18,43,74,.04);
    }
    .accordion-button{
      font-weight:800;
      color:var(--text);
    }
    .accordion-button:not(.collapsed){
      box-shadow:none;
    }
    .accordion-body{
      color:var(--muted);
      padding-top:0;
    }
    .footer{
      margin-top:18px;
      padding:22px 0 36px;
      color:#dce8f7;
    }
    .footer-shell{
      background:linear-gradient(180deg,#163968,#122f56);
      border-radius:18px;
      padding:28px;
      box-shadow:0 18px 36px rgba(13,35,64,.16);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:18px;
      align-items:start;
    }
    .footer h3,
    .footer h4{
      margin:0 0 12px;
      color:#fff;
      font-weight:800;
    }
    .footer p,
    .footer a{
      color:#dbe7f7;
    }
    .footer-links{
      display:grid;
      gap:8px;
    }
    .footer-links a{
      display:inline-flex;
      align-items:center;
      gap:6px;
      width:max-content;
      transition:.2s ease;
    }
    .footer-links a:hover{color:#fff;transform:translateX(2px)}
    .copyright{
      margin-top:18px;
      padding-top:16px;
      border-top:1px solid rgba(255,255,255,.14);
      display:flex;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
      color:#bdd0ea;
      font-size:.92rem;
    }
    .back-top{
      position:fixed;
      right:18px;
      bottom:18px;
      width:46px;
      height:46px;
      border-radius:50%;
      background:var(--brand);
      color:#fff;
      display:grid;
      place-items:center;
      box-shadow:0 12px 24px rgba(31,95,191,.22);
      z-index:1030;
      transition:.2s ease;
    }
    .back-top:hover{transform:translateY(-2px);background:var(--brand-deep);color:#fff}
    .form-mini{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:16px;
    }
    .form-mini input{
      flex:1 1 220px;
      min-height:48px;
      border:1px solid var(--line);
      border-radius:12px;
      padding:0 14px;
      background:#fff;
      color:var(--text);
      outline:none;
      transition:.2s ease;
    }
    .form-mini input:focus{
      border-color:rgba(31,95,191,.45);
      box-shadow:0 0 0 .18rem rgba(31,95,191,.12);
    }
    .form-note{
      margin-top:10px;
      color:var(--muted);
      font-size:.88rem;
    }
    .micro-strip{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:8px;
    }
    .micro-strip .chip{
      padding:8px 11px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.86rem;
      font-weight:600;
    }
    .divider{
      height:1px;
      background:linear-gradient(90deg, transparent, var(--line), transparent);
      margin:18px 0;
    }
    .reassure{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:14px;
    }
    .reassure .pill{
      border:1px solid var(--line);
      background:#fff;
      color:var(--muted);
      padding:10px 12px;
      border-radius:12px;
      font-weight:600;
      font-size:.9rem;
    }
    @media (max-width: 1199.98px){
      .hero-grid,
      .intro-grid,
      .stack-grid,
      .latest-grid,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .recommend{
        position:static;
      }
      .hot-card{
        grid-column:span 6;
      }
    }
    @media (max-width: 991.98px){
      .hero{
        padding-top:20px;
      }
      .hero-grid{
        padding:22px;
      }
      .hero-copy{
        padding-right:0;
      }
      .navbar-collapse{
        padding:12px 0 6px;
      }
      .nav-actions{
        margin-top:8px;
      }
      .section-card{
        padding:22px;
      }
    }
    @media (max-width: 767.98px){
      .topbar-inner{
        flex-direction:column;
        align-items:flex-start;
      }
      .hero h1{
        max-width:none;
      }
      .hero-grid{
        grid-template-columns:1fr;
      }
      .hero-bento{
        grid-template-columns:1fr 1fr;
      }
      .hot-card{
        grid-column:span 12;
      }
      .section-title{
        align-items:flex-start;
        flex-direction:column;
      }
      .section-card{
        padding:18px;
      }
      .cta-band{
        padding:22px;
      }
    }
    @media (max-width: 575.98px){
      .container-custom{width:min(var(--container),calc(100% - 20px))}
      .nav-wrap{
        padding:12px 0;
      }
      .brand-title span{
        display:none;
      }
      .hero-grid,
      .section-card,
      .cta-band,
      .footer-shell{
        border-radius:14px;
      }
      .hero-bento{
        grid-template-columns:1fr;
      }
      .data-pill{
        min-width:calc(50% - 5px);
        flex:1 1 calc(50% - 5px);
      }
      .stack-item,
      .link-list li a{
        flex-direction:column;
        align-items:flex-start;
      }
      .link-list .link-meta{
        white-space:normal;
      }
      .quote-card{
        min-width:86%;
        flex-basis:86%;
      }
      .back-top{
        right:14px;
        bottom:14px;
      }
    }
    :focus-visible{
      outline:2px solid rgba(31,95,191,.22);
      outline-offset:2px;
    }

/* roulang page: category1 */
:root{
      --bg:#f5f8fc;
      --bg-soft:#eef4fb;
      --card:#ffffff;
      --text:#17304f;
      --muted:#5f728c;
      --line:#d7e2ef;
      --blue:#2f6fed;
      --blue-dark:#1e56c5;
      --blue-soft:#e6efff;
      --cyan:#dff5f7;
      --warm:#fff4dd;
      --shadow:0 12px 30px rgba(32, 66, 117, .08);
      --shadow-hover:0 16px 38px rgba(32, 66, 117, .14);
      --radius:8px;
      --radius-sm:6px;
      --space:24px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,111,237,.08), transparent 28%),
        radial-gradient(circle at top right, rgba(31,165,174,.05), transparent 24%),
        linear-gradient(180deg, #fbfdff 0%, var(--bg) 100%);
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none;transition:all .22s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(47,111,237,.16)}
    .container-custom{
      width:min(1180px, calc(100% - 32px));
      margin:0 auto;
    }
    .top-strip{
      background:rgba(255,255,255,.74);
      border-bottom:1px solid rgba(215,226,239,.9);
      backdrop-filter:saturate(180%) blur(10px);
      position:relative;
      z-index:1030;
    }
    .top-strip__inner{
      min-height:44px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      color:var(--muted);
      font-size:.92rem;
      padding:8px 0;
    }
    .top-strip__meta{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }
    .top-strip__pill{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:5px 10px;
      border-radius:999px;
      background:var(--blue-soft);
      color:var(--blue-dark);
      border:1px solid rgba(47,111,237,.1);
      white-space:nowrap;
    }
    .top-strip__action{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--blue-dark);
      font-weight:600;
      white-space:nowrap;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:1020;
      background:rgba(255,255,255,.82);
      backdrop-filter:saturate(180%) blur(12px);
      border-bottom:1px solid rgba(215,226,239,.75);
      box-shadow:0 1px 0 rgba(255,255,255,.6);
    }
    .nav-wrap{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:18px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
      color:var(--text);
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:12px;
      background:linear-gradient(145deg, var(--blue), #4b84ff);
      color:#fff;
      display:grid;
      place-items:center;
      box-shadow:0 12px 24px rgba(47,111,237,.22);
      flex:0 0 auto;
    }
    .brand-title{
      display:flex;
      flex-direction:column;
      min-width:0;
      line-height:1.15;
    }
    .brand-title strong{
      font-size:1.02rem;
      letter-spacing:.01em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-title span{
      font-size:.84rem;
      color:var(--muted);
      margin-top:4px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .navbar-nav{
      gap:8px;
    }
    .nav-link-custom{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:8px 14px;
      border-radius:999px;
      color:var(--text);
      font-weight:600;
      border:1px solid transparent;
    }
    .nav-link-custom:hover{
      background:rgba(47,111,237,.07);
      border-color:rgba(47,111,237,.08);
      color:var(--blue-dark);
    }
    .nav-link-custom.active,
    .nav-link-custom[aria-current="page"]{
      background:var(--blue);
      color:#fff;
      box-shadow:0 10px 20px rgba(47,111,237,.18);
    }
    .nav-actions{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .btn-primary-custom,
    .btn-ghost,
    .chip-btn,
    .card-action,
    .pager-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border-radius:999px;
      min-height:44px;
      padding:10px 16px;
      font-weight:700;
      line-height:1;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
      border:1px solid transparent;
    }
    .btn-primary-custom{
      background:var(--blue);
      color:#fff;
      box-shadow:0 12px 20px rgba(47,111,237,.18);
    }
    .btn-primary-custom:hover{
      background:var(--blue-dark);
      color:#fff;
      transform:translateY(-1px);
      box-shadow:0 14px 26px rgba(47,111,237,.22);
    }
    .btn-ghost{
      background:#fff;
      color:var(--blue-dark);
      border-color:var(--line);
      box-shadow:0 8px 20px rgba(21,43,72,.04);
    }
    .btn-ghost:hover{
      border-color:rgba(47,111,237,.22);
      color:var(--blue-dark);
      transform:translateY(-1px);
      box-shadow:0 14px 24px rgba(21,43,72,.08);
    }
    .hero{
      padding:34px 0 14px;
    }
    .hero-shell{
      background:
        linear-gradient(180deg, rgba(255,255,255,.95), rgba(245,249,255,.96));
      border:1px solid rgba(215,226,239,.9);
      border-radius:18px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-shell::before{
      content:"";
      position:absolute;
      inset:auto -120px -120px auto;
      width:280px;
      height:280px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(47,111,237,.09) 0%, rgba(47,111,237,0) 68%);
      pointer-events:none;
    }
    .hero-inner{
      padding:32px;
      display:grid;
      grid-template-columns:1.12fr .88fr;
      gap:26px;
      align-items:center;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(47,111,237,.08);
      color:var(--blue-dark);
      font-size:.9rem;
      font-weight:700;
      border:1px solid rgba(47,111,237,.08);
      margin-bottom:14px;
    }
    h1{
      font-size:clamp(2rem, 4vw, 3.35rem);
      line-height:1.08;
      margin:0 0 16px;
      letter-spacing:-.03em;
      font-weight:800;
    }
    .hero-lead{
      font-size:1.05rem;
      color:var(--muted);
      max-width:58ch;
      margin:0 0 22px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-bottom:18px;
    }
    .hero-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .meta-pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.93rem;
      box-shadow:0 6px 18px rgba(32,66,117,.04);
    }
    .hero-side{
      display:grid;
      gap:14px;
      position:relative;
      z-index:1;
    }
    .matrix-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
    }
    .matrix-card,
    .summary-card,
    .spot-card{
      background:#fff;
      border:1px solid rgba(215,226,239,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .matrix-card{
      padding:16px;
      min-height:112px;
    }
    .matrix-card .label{
      display:flex;
      align-items:center;
      gap:8px;
      color:var(--muted);
      font-size:.88rem;
      margin-bottom:10px;
    }
    .matrix-card strong{
      display:block;
      font-size:1.15rem;
      line-height:1.35;
      margin-bottom:6px;
    }
    .matrix-card p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }
    .summary-card{
      padding:18px;
      background:
        linear-gradient(180deg, #fff, #f8fbff);
    }
    .summary-card__top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:14px;
    }
    .ring{
      width:62px;
      height:62px;
      border-radius:50%;
      background:conic-gradient(var(--blue) 0 76%, #e5edf8 76% 100%);
      display:grid;
      place-items:center;
      flex:0 0 auto;
    }
    .ring span{
      width:44px;
      height:44px;
      border-radius:50%;
      background:#fff;
      display:grid;
      place-items:center;
      color:var(--blue-dark);
      font-weight:800;
      box-shadow:inset 0 0 0 1px rgba(215,226,239,.8);
    }
    .summary-card h2,
    .section-head h2{
      font-size:1.4rem;
      margin:0 0 8px;
      line-height:1.25;
      letter-spacing:-.02em;
    }
    .summary-card p{
      margin:0;
      color:var(--muted);
    }
    .summary-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:14px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      padding:6px 10px;
      border-radius:999px;
      font-size:.86rem;
      font-weight:700;
      background:var(--blue-soft);
      color:var(--blue-dark);
      border:1px solid rgba(47,111,237,.08);
    }
    .section-block{
      padding:20px 0 0;
    }
    .section-surface{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(215,226,239,.82);
      border-radius:18px;
      box-shadow:var(--shadow);
      padding:22px;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:20px;
      align-items:end;
      margin-bottom:16px;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      max-width:66ch;
    }
    .filter-bar{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      align-items:center;
      padding:14px;
      background:#f7faff;
      border:1px solid rgba(215,226,239,.9);
      border-radius:14px;
      margin-bottom:18px;
    }
    .filter-bar .hint{
      color:var(--muted);
      font-size:.93rem;
      margin-right:8px;
    }
    .chip-btn{
      background:#fff;
      color:var(--text);
      border-color:var(--line);
      min-height:40px;
      padding:9px 14px;
      font-size:.93rem;
      box-shadow:0 6px 16px rgba(32,66,117,.04);
    }
    .chip-btn:hover{
      border-color:rgba(47,111,237,.22);
      color:var(--blue-dark);
      transform:translateY(-1px);
    }
    .chip-btn.active{
      background:var(--blue);
      color:#fff;
      border-color:transparent;
    }
    .status-line{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
      padding:12px 14px;
      border-radius:14px;
      background:linear-gradient(180deg, #fff, #f8fbff);
      border:1px solid rgba(215,226,239,.8);
      margin-bottom:18px;
      color:var(--muted);
    }
    .status-line strong{
      color:var(--text);
    }
    .status-line .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:#4cc38a;
      display:inline-block;
      box-shadow:0 0 0 4px rgba(76,195,138,.12);
    }
    .cards-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:16px;
    }
    .content-card{
      background:#fff;
      border:1px solid rgba(215,226,239,.95);
      border-radius:16px;
      box-shadow:0 10px 24px rgba(32,66,117,.06);
      padding:18px;
      display:flex;
      flex-direction:column;
      min-height:100%;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .content-card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(47,111,237,.18);
    }
    .content-card__head{
      display:flex;
      justify-content:space-between;
      gap:12px;
      margin-bottom:12px;
    }
    .content-card__badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      background:var(--blue-soft);
      color:var(--blue-dark);
      font-size:.84rem;
      font-weight:700;
      align-self:flex-start;
      flex:0 0 auto;
    }
    .content-card__title{
      font-size:1.18rem;
      margin:0 0 10px;
      line-height:1.35;
    }
    .content-card__desc{
      color:var(--muted);
      margin:0 0 14px;
      font-size:.97rem;
    }
    .content-card__list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:8px;
    }
    .content-card__list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--text);
      font-size:.93rem;
    }
    .content-card__list i{
      margin-top:4px;
      color:var(--blue);
      flex:0 0 auto;
    }
    .content-card__footer{
      margin-top:auto;
      padding-top:16px;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:space-between;
      gap:12px;
    }
    .mini-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mini-meta span{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 9px;
      border-radius:999px;
      background:#f8fbff;
      border:1px solid rgba(215,226,239,.8);
      color:var(--muted);
      font-size:.84rem;
    }
    .card-action{
      min-height:40px;
      padding:9px 14px;
      background:#fff;
      color:var(--blue-dark);
      border:1px solid rgba(47,111,237,.18);
    }
    .card-action:hover{
      color:#fff;
      background:var(--blue);
      border-color:var(--blue);
      transform:translateY(-1px);
    }
    .pager-shell{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      margin-top:18px;
      padding:14px 16px;
      background:#f7faff;
      border:1px solid rgba(215,226,239,.85);
      border-radius:14px;
    }
    .pager-info{
      color:var(--muted);
    }
    .pager{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
    }
    .pager-link{
      min-width:44px;
      padding:10px 14px;
      background:#fff;
      color:var(--text);
      border:1px solid var(--line);
      box-shadow:0 8px 18px rgba(32,66,117,.04);
    }
    .pager-link:hover{
      border-color:rgba(47,111,237,.22);
      color:var(--blue-dark);
      transform:translateY(-1px);
    }
    .pager-link.active{
      background:var(--blue);
      color:#fff;
      border-color:transparent;
    }
    .rail{
      margin-top:20px;
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:18px;
    }
    .spot-card{
      padding:20px;
    }
    .spot-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .spot-list li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px;
      border-radius:12px;
      background:#f8fbff;
      border:1px solid rgba(215,226,239,.72);
    }
    .spot-list .num{
      width:28px;
      height:28px;
      border-radius:50%;
      background:var(--warm);
      color:#9b6b12;
      display:grid;
      place-items:center;
      font-weight:800;
      flex:0 0 auto;
      margin-top:2px;
    }
    .spot-list strong{
      display:block;
      margin-bottom:4px;
    }
    .spot-list p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }
    .support-grid{
      display:grid;
      gap:12px;
    }
    .support-item{
      padding:14px 16px;
      background:#fff;
      border:1px solid rgba(215,226,239,.85);
      border-radius:14px;
      box-shadow:0 10px 22px rgba(32,66,117,.05);
    }
    .support-item .top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:8px;
    }
    .support-item h3{
      font-size:1rem;
      margin:0;
    }
    .support-item span{
      color:var(--blue-dark);
      font-weight:700;
      font-size:.9rem;
    }
    .support-item p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }
    .faq-section{
      margin-top:20px;
    }
    .faq-accordion{
      display:grid;
      gap:12px;
    }
    .accordion-item{
      border:1px solid rgba(215,226,239,.9);
      border-radius:14px;
      overflow:hidden;
      box-shadow:0 10px 20px rgba(32,66,117,.04);
      background:#fff;
    }
    .accordion-button{
      background:#fff;
      color:var(--text);
      font-weight:700;
      box-shadow:none !important;
      padding:18px 18px;
    }
    .accordion-button:not(.collapsed){
      color:var(--blue-dark);
      background:linear-gradient(180deg, #fff, #f8fbff);
    }
    .accordion-button::after{
      filter:hue-rotate(180deg);
    }
    .accordion-body{
      color:var(--muted);
      padding:0 18px 18px;
    }
    .cta-panel{
      margin:26px 0 8px;
      background:linear-gradient(135deg, #225bd3 0%, #2f6fed 48%, #4a8dff 100%);
      color:#fff;
      border-radius:20px;
      overflow:hidden;
      position:relative;
      box-shadow:0 18px 36px rgba(47,111,237,.18);
    }
    .cta-panel::before{
      content:"";
      position:absolute;
      inset:-40px auto auto -60px;
      width:180px;
      height:180px;
      border-radius:50%;
      background:rgba(255,255,255,.1);
    }
    .cta-panel::after{
      content:"";
      position:absolute;
      inset:auto -80px -100px auto;
      width:240px;
      height:240px;
      border-radius:50%;
      background:rgba(255,255,255,.08);
    }
    .cta-inner{
      position:relative;
      z-index:1;
      padding:28px;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:18px;
      flex-wrap:wrap;
    }
    .cta-inner h2{
      margin:0 0 8px;
      font-size:1.55rem;
      line-height:1.28;
    }
    .cta-inner p{
      margin:0;
      color:rgba(255,255,255,.86);
      max-width:64ch;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }
    .btn-light-custom{
      background:#fff;
      color:var(--blue-dark);
      border:1px solid #fff;
    }
    .btn-light-custom:hover{
      transform:translateY(-1px);
      color:var(--blue-dark);
      box-shadow:0 10px 20px rgba(0,0,0,.12);
    }
    .btn-outline-light-custom{
      background:transparent;
      color:#fff;
      border-color:rgba(255,255,255,.5);
    }
    .btn-outline-light-custom:hover{
      color:#fff;
      border-color:#fff;
      background:rgba(255,255,255,.09);
      transform:translateY(-1px);
    }
    .footer{
      margin-top:24px;
      padding:34px 0 28px;
      background:linear-gradient(180deg, #f7fbff, #eef4fb);
      border-top:1px solid rgba(215,226,239,.85);
    }
    .footer-shell{
      background:#fff;
      border:1px solid rgba(215,226,239,.9);
      border-radius:18px;
      box-shadow:var(--shadow);
      padding:24px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.15fr .7fr .8fr;
      gap:22px;
    }
    .footer h3{
      font-size:1.15rem;
      margin:0 0 10px;
    }
    .footer h4{
      font-size:1rem;
      margin:0 0 12px;
    }
    .footer p{
      color:var(--muted);
      margin:0;
    }
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a,
    .footer-links span{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--muted);
      font-size:.94rem;
    }
    .footer-links a:hover{
      color:var(--blue-dark);
      transform:translateX(2px);
    }
    .copyright{
      margin-top:18px;
      padding-top:16px;
      border-top:1px solid rgba(215,226,239,.9);
      display:flex;
      gap:12px;
      justify-content:space-between;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:.92rem;
    }
    .navbar-toggler{
      border:1px solid var(--line);
      border-radius:12px;
      width:44px;
      height:44px;
      display:grid;
      place-items:center;
      color:var(--text);
      box-shadow:0 8px 18px rgba(32,66,117,.05);
    }
    .navbar-toggler:focus{
      box-shadow:0 0 0 4px rgba(47,111,237,.14);
    }
    .btn:focus,
    .btn-primary-custom:focus,
    .btn-ghost:focus,
    .chip-btn:focus,
    .card-action:focus,
    .pager-link:focus,
    .nav-link-custom:focus,
    .accordion-button:focus{
      box-shadow:0 0 0 4px rgba(47,111,237,.16) !important;
      outline:none;
    }
    @media (max-width: 991.98px){
      .hero-inner,
      .rail,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .hero-inner{padding:24px}
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .nav-actions{
        margin-top:16px;
        flex-wrap:wrap;
      }
      .navbar-collapse{
        padding:16px 0 8px;
      }
      .navbar-nav{
        gap:6px;
        padding:10px 0 4px;
      }
      .nav-link-custom{
        width:100%;
        justify-content:flex-start;
      }
    }
    @media (max-width: 767.98px){
      .top-strip__inner{
        align-items:flex-start;
        flex-direction:column;
      }
      .cards-grid{
        grid-template-columns:1fr;
      }
      .matrix-grid{
        grid-template-columns:1fr;
      }
      .hero{
        padding-top:18px;
      }
      h1{
        font-size:2.1rem;
      }
      .hero-lead{
        font-size:1rem;
      }
      .section-surface{
        padding:16px;
        border-radius:16px;
      }
      .cta-inner{
        padding:22px;
      }
      .cta-inner h2{
        font-size:1.3rem;
      }
      .top-strip{
        display:none;
      }
    }
    @media (max-width: 575.98px){
      .container-custom{
        width:min(100% - 20px, 1180px);
      }
      .hero-inner{
        padding:18px;
      }
      .summary-card,
      .matrix-card,
      .content-card,
      .spot-card{
        border-radius:14px;
      }
      .hero-actions,
      .cta-actions{
        width:100%;
      }
      .hero-actions .btn,
      .cta-actions .btn{
        width:100%;
      }
      .pager-shell{
        padding:12px;
      }
      .pager{
        width:100%;
      }
      .pager-link{
        flex:1 0 calc(25% - 8px);
      }
    }

/* roulang page: category2 */
:root {
      --color-primary: #2368d5;
      --color-primary-dark: #174fa8;
      --color-primary-soft: #eaf2ff;
      --color-secondary: #12a3a8;
      --color-accent: #f59e43;
      --color-bg: #f7faff;
      --color-surface: #ffffff;
      --color-surface-soft: #f3f7fc;
      --color-text: #172033;
      --color-muted: #66728a;
      --color-light: #8a96aa;
      --color-border: #dce5f2;
      --radius-sm: 6px;
      --radius-md: 8px;
      --shadow-sm: 0 8px 22px rgba(25, 73, 130, .07);
      --shadow-md: 0 16px 40px rgba(25, 73, 130, .11);
      --container: 1180px;
      --nav-height: 76px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--color-text);
      background:
        radial-gradient(circle at 8% 5%, rgba(35, 104, 213, .08), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(18, 163, 168, .08), transparent 26%),
        var(--color-bg);
      line-height: 1.75;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }

    img,
    svg {
      max-width: 100%;
      vertical-align: middle;
    }

    button,
    input,
    select {
      font: inherit;
    }

    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible {
      outline: 3px solid rgba(35, 104, 213, .22);
      outline-offset: 3px;
      border-radius: var(--radius-sm);
    }

    .container-custom {
      width: min(100% - 32px, var(--container));
      margin-inline: auto;
    }

    .top-strip {
      border-bottom: 1px solid rgba(220, 229, 242, .85);
      background: rgba(255, 255, 255, .9);
      backdrop-filter: blur(14px);
      font-size: 13px;
      color: var(--color-muted);
    }

    .top-strip-inner {
      min-height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .top-strip-left,
    .top-strip-right {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .top-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: var(--color-primary-soft);
      color: var(--color-primary-dark);
      border-radius: 999px;
      font-weight: 600;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .94);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(220, 229, 242, .9);
      box-shadow: 0 8px 28px rgba(25, 73, 130, .04);
    }

    .nav-wrap {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 255px;
    }

    .brand:hover .brand-mark {
      transform: translateY(-1px);
      box-shadow: var(--shadow-sm);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      transition: transform .2s ease, box-shadow .2s ease;
    }

    .brand-title {
      display: flex;
      flex-direction: column;
      line-height: 1.25;
    }

    .brand-title strong {
      font-size: 17px;
      letter-spacing: -.2px;
      color: var(--color-text);
    }

    .brand-title span {
      font-size: 12px;
      color: var(--color-light);
      margin-top: 3px;
    }

    .navbar-toggler {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      color: var(--color-primary);
      background: #fff;
      box-shadow: none;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(35, 104, 213, .12);
    }

    .navbar-nav {
      align-items: center;
      gap: 6px;
    }

    .nav-link-custom {
      display: inline-flex;
      align-items: center;
      min-height: 42px;
      padding: 8px 13px;
      border-radius: var(--radius-sm);
      color: var(--color-muted);
      font-size: 14px;
      font-weight: 650;
      border: 1px solid transparent;
    }

    .nav-link-custom:hover {
      color: var(--color-primary);
      background: var(--color-primary-soft);
    }

    .nav-link-custom.active {
      color: var(--color-primary-dark);
      background: #fff;
      border-color: rgba(35, 104, 213, .16);
      box-shadow: var(--shadow-sm);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-primary-custom,
    .btn-ghost,
    .btn-line {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-md);
      font-size: 14px;
      font-weight: 750;
      padding: 10px 16px;
      border: 1px solid transparent;
      cursor: pointer;
      white-space: nowrap;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
    }

    .btn-primary-custom {
      color: #fff;
      background: var(--color-primary);
      box-shadow: 0 10px 22px rgba(35, 104, 213, .22);
    }

    .btn-primary-custom:hover {
      color: #fff;
      background: var(--color-primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 16px 32px rgba(35, 104, 213, .25);
    }

    .btn-ghost,
    .btn-line {
      color: var(--color-primary-dark);
      background: #fff;
      border-color: var(--color-border);
    }

    .btn-ghost:hover,
    .btn-line:hover {
      color: var(--color-primary);
      border-color: rgba(35, 104, 213, .28);
      background: var(--color-primary-soft);
      transform: translateY(-1px);
    }

    main {
      overflow: hidden;
    }

    .section {
      padding: 78px 0;
    }

    .section.compact {
      padding: 56px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 11px;
      border: 1px solid rgba(35, 104, 213, .14);
      border-radius: 999px;
      background: rgba(234, 242, 255, .78);
      color: var(--color-primary-dark);
      font-size: 13px;
      font-weight: 750;
      margin-bottom: 16px;
    }

    .hero {
      padding: 68px 0 54px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, .78), rgba(247, 250, 255, .98)),
        radial-gradient(circle at 76% 20%, rgba(35, 104, 213, .09), transparent 35%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
      gap: 38px;
      align-items: stretch;
    }

    .hero-copy {
      padding-top: 18px;
    }

    .hero h1 {
      font-size: clamp(34px, 4.6vw, 58px);
      line-height: 1.08;
      letter-spacing: -.8px;
      margin: 0 0 20px;
      font-weight: 900;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--color-muted);
      max-width: 690px;
      margin: 0 0 26px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }

    .hero-mini {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 640px;
    }

    .mini-stat {
      padding: 15px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .88);
      box-shadow: var(--shadow-sm);
    }

    .mini-stat strong {
      display: block;
      font-size: 23px;
      line-height: 1.1;
      color: var(--color-primary-dark);
      margin-bottom: 5px;
    }

    .mini-stat span {
      color: var(--color-light);
      font-size: 13px;
    }

    .whitepaper-card {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #fff;
      box-shadow: var(--shadow-md);
      padding: 18px;
      position: relative;
    }

    .paper-top {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 18px;
      align-items: stretch;
      margin-bottom: 18px;
    }

    .paper-cover {
      min-height: 205px;
      border-radius: var(--radius-md);
      padding: 18px;
      color: #fff;
      background:
        linear-gradient(150deg, rgba(35, 104, 213, .95), rgba(18, 163, 168, .82)),
        radial-gradient(circle at 25% 15%, rgba(255, 255, 255, .25), transparent 26%);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2);
    }

    .paper-cover small {
      opacity: .86;
      font-weight: 700;
    }

    .paper-cover b {
      font-size: 25px;
      line-height: 1.16;
      letter-spacing: -.3px;
    }

    .paper-cover span {
      font-size: 12px;
      opacity: .9;
    }

    .paper-summary h2 {
      font-size: 22px;
      line-height: 1.3;
      margin: 2px 0 10px;
      font-weight: 850;
    }

    .paper-summary p {
      margin: 0 0 14px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .toc-list {
      display: grid;
      gap: 9px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .toc-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 9px 10px;
      border-radius: var(--radius-sm);
      background: var(--color-surface-soft);
      color: var(--color-muted);
      font-size: 13px;
    }

    .toc-list strong {
      color: var(--color-text);
      font-weight: 750;
    }

    .lead-form {
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(35, 104, 213, .12);
      background: linear-gradient(180deg, #f8fbff, #fff);
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 10px;
    }

    .form-control-custom {
      width: 100%;
      min-height: 44px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 10px 13px;
      color: var(--color-text);
      background: #fff;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    .form-control-custom:focus {
      border-color: rgba(35, 104, 213, .55);
      box-shadow: 0 0 0 4px rgba(35, 104, 213, .1);
      outline: 0;
    }

    .form-note {
      color: var(--color-light);
      font-size: 12px;
      margin: 9px 0 0;
    }

    .status-bar {
      margin-top: 28px;
      padding: 12px 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .76);
      box-shadow: var(--shadow-sm);
    }

    .status-group {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .filter-chip,
    .tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 34px;
      padding: 6px 11px;
      border-radius: 999px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 700;
    }

    .filter-chip.active {
      color: #fff;
      background: var(--color-primary);
      border-color: var(--color-primary);
    }

    .intro-band {
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
      background: rgba(255, 255, 255, .75);
    }

    .intro-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 34px;
      align-items: center;
    }

    .section-title {
      margin: 0 0 14px;
      font-size: clamp(27px, 3vw, 42px);
      line-height: 1.18;
      font-weight: 900;
      letter-spacing: -.4px;
    }

    .section-desc {
      color: var(--color-muted);
      margin: 0;
      font-size: 16px;
    }

    .compare-panel {
      display: grid;
      gap: 12px;
    }

    .compare-row {
      display: grid;
      grid-template-columns: 150px 1fr auto;
      gap: 14px;
      align-items: center;
      padding: 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .compare-row strong {
      font-size: 15px;
    }

    .score-line {
      height: 8px;
      border-radius: 999px;
      overflow: hidden;
      background: #e9eef7;
    }

    .score-line span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    }

    .flow-layout {
      display: grid;
      grid-template-columns: 300px minmax(0, 1fr);
      gap: 28px;
      align-items: start;
    }

    .side-filter {
      position: sticky;
      top: 104px;
      padding: 18px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .92);
      box-shadow: var(--shadow-sm);
    }

    .side-filter h2 {
      font-size: 19px;
      margin: 0 0 14px;
      font-weight: 850;
    }

    .filter-block {
      padding-top: 15px;
      margin-top: 15px;
      border-top: 1px solid var(--color-border);
    }

    .filter-block:first-of-type {
      padding-top: 0;
      margin-top: 0;
      border-top: 0;
    }

    .filter-title {
      display: block;
      color: var(--color-text);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .filter-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .topic-flow {
      display: grid;
      gap: 18px;
    }

    .topic-card {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 190px;
      gap: 18px;
      padding: 20px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #fff;
      box-shadow: var(--shadow-sm);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .topic-card:hover {
      transform: translateY(-2px);
      border-color: rgba(35, 104, 213, .22);
      box-shadow: var(--shadow-md);
    }

    .topic-meta {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
      margin-bottom: 10px;
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 9px;
      border-radius: 999px;
      background: var(--color-primary-soft);
      color: var(--color-primary-dark);
      font-size: 12px;
      font-weight: 800;
    }

    .badge-warm {
      background: #fff4e7;
      color: #a65b0b;
    }

    .topic-card h3 {
      font-size: 22px;
      line-height: 1.3;
      margin: 0 0 10px;
      font-weight: 880;
    }

    .topic-card p {
      color: var(--color-muted);
      margin: 0 0 14px;
    }

    .check-list {
      display: grid;
      gap: 9px;
      padding: 0;
      margin: 0;
      list-style: none;
    }

    .check-list li {
      display: flex;
      gap: 8px;
      align-items: flex-start;
      color: var(--color-muted);
      font-size: 14px;
    }

    .check-list i {
      color: var(--color-secondary);
      margin-top: 4px;
      flex: 0 0 auto;
    }

    .topic-aside {
      display: grid;
      align-content: space-between;
      gap: 14px;
      padding: 15px;
      border-radius: var(--radius-md);
      background: var(--color-surface-soft);
      border: 1px solid rgba(220, 229, 242, .8);
    }

    .rating {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .rating strong {
      font-size: 28px;
      color: var(--color-primary-dark);
      line-height: 1;
    }

    .stars {
      color: var(--color-accent);
      letter-spacing: 1px;
      font-size: 13px;
    }

    .aside-note {
      color: var(--color-light);
      font-size: 13px;
      margin: 0;
    }

    .guide-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 24px;
      align-items: stretch;
    }

    .process-card,
    .recommend-card,
    .faq-card,
    .cta-box {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .process-card {
      padding: 24px;
    }

    .process-steps {
      counter-reset: step;
      display: grid;
      gap: 14px;
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
    }

    .process-steps li {
      counter-increment: step;
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      align-items: start;
      padding: 15px;
      border-radius: var(--radius-md);
      background: var(--color-surface-soft);
      border: 1px solid rgba(220, 229, 242, .85);
    }

    .process-steps li::before {
      content: counter(step);
      width: 36px;
      height: 36px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      background: var(--color-primary);
      color: #fff;
      font-weight: 850;
    }

    .process-steps strong {
      display: block;
      margin-bottom: 3px;
      font-size: 15px;
    }

    .process-steps span {
      color: var(--color-muted);
      font-size: 14px;
    }

    .recommend-card {
      padding: 24px;
      background:
        linear-gradient(180deg, #fff, #f8fbff);
    }

    .recommend-list {
      display: grid;
      gap: 12px;
      margin-top: 18px;
    }

    .recommend-item {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 12px;
      align-items: start;
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      background: #fff;
    }

    .recommend-item span {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      background: var(--color-primary-soft);
      color: var(--color-primary-dark);
      font-weight: 850;
    }

    .recommend-item strong {
      display: block;
      margin-bottom: 3px;
    }

    .recommend-item p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .review-strip {
      overflow: hidden;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
      background: #fff;
    }

    .review-track {
      display: flex;
      gap: 14px;
      width: max-content;
      animation: reviewMove 26s linear infinite;
      padding: 18px 0;
    }

    .review-item {
      min-width: 300px;
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: var(--color-surface-soft);
      box-shadow: var(--shadow-sm);
    }

    .avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      font-weight: 850;
      flex: 0 0 auto;
    }

    .review-item strong {
      display: block;
      font-size: 14px;
      line-height: 1.3;
    }

    .review-item span {
      color: var(--color-muted);
      font-size: 13px;
    }

    @keyframes reviewMove {
      from {
        transform: translateX(0);
      }
      to {
        transform: translateX(-50%);
      }
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: .85fr 1.15fr;
      gap: 28px;
      align-items: start;
    }

    .faq-card {
      padding: 0;
      overflow: hidden;
    }

    .accordion-item {
      border-color: var(--color-border);
    }

    .accordion-button {
      padding: 18px 20px;
      font-weight: 800;
      color: var(--color-text);
      background: #fff;
      box-shadow: none;
    }

    .accordion-button:not(.collapsed) {
      color: var(--color-primary-dark);
      background: var(--color-primary-soft);
      box-shadow: none;
    }

    .accordion-button:focus {
      border-color: rgba(35, 104, 213, .3);
      box-shadow: 0 0 0 4px rgba(35, 104, 213, .1);
    }

    .accordion-body {
      color: var(--color-muted);
      padding: 0 20px 18px;
    }

    .cta-box {
      padding: 30px;
      background:
        linear-gradient(135deg, rgba(35, 104, 213, .95), rgba(18, 163, 168, .9)),
        radial-gradient(circle at 15% 20%, rgba(255, 255, 255, .22), transparent 24%);
      color: #fff;
      overflow: hidden;
    }

    .cta-box h2 {
      font-size: clamp(26px, 3vw, 40px);
      line-height: 1.18;
      margin: 0 0 12px;
      font-weight: 900;
    }

    .cta-box p {
      max-width: 760px;
      margin: 0 0 22px;
      color: rgba(255, 255, 255, .86);
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
    }

    .cta-box .btn-primary-custom {
      background: #fff;
      color: var(--color-primary-dark);
      box-shadow: 0 14px 28px rgba(5, 27, 56, .18);
    }

    .cta-box .btn-primary-custom:hover {
      background: #f5f8ff;
      color: var(--color-primary-dark);
    }

    .cta-box .btn-line {
      color: #fff;
      background: rgba(255, 255, 255, .1);
      border-color: rgba(255, 255, 255, .35);
    }

    .cta-box .btn-line:hover {
      background: rgba(255, 255, 255, .18);
      color: #fff;
      border-color: rgba(255, 255, 255, .55);
    }

    .footer {
      padding: 54px 0 32px;
      background: #0f1c31;
      color: rgba(255, 255, 255, .78);
    }

    .footer-shell {
      border: 1px solid rgba(255, 255, 255, .1);
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .04);
      padding: 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr .8fr .8fr;
      gap: 28px;
    }

    .footer h3,
    .footer h4 {
      color: #fff;
      margin: 0 0 12px;
      font-weight: 850;
    }

    .footer p {
      margin: 0;
      color: rgba(255, 255, 255, .66);
      max-width: 470px;
    }

    .footer-links {
      display: grid;
      gap: 9px;
      color: rgba(255, 255, 255, .66);
      font-size: 14px;
    }

    .footer-links a,
    .footer-links span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 26px;
    }

    .footer-links a:hover {
      color: #fff;
      transform: translateX(2px);
    }

    .copyright {
      margin-top: 24px;
      padding-top: 18px;
      border-top: 1px solid rgba(255, 255, 255, .1);
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      color: rgba(255, 255, 255, .58);
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .hero-grid,
      .intro-grid,
      .guide-grid,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .flow-layout {
        grid-template-columns: 260px minmax(0, 1fr);
        gap: 20px;
      }

      .topic-card {
        grid-template-columns: 1fr;
      }

      .topic-aside {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 991px) {
      .nav-wrap {
        padding: 12px 0;
        align-items: flex-start;
      }

      .navbar-collapse {
        width: 100%;
        margin-top: 12px;
        padding: 14px;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        background: #fff;
        box-shadow: var(--shadow-sm);
      }

      .navbar-nav {
        align-items: stretch;
      }

      .nav-link-custom {
        width: 100%;
      }

      .nav-actions {
        margin-top: 12px;
        display: grid;
        grid-template-columns: 1fr 1fr;
      }

      .top-strip-inner {
        align-items: flex-start;
        padding: 8px 0;
      }
    }

    @media (max-width: 768px) {
      .section {
        padding: 58px 0;
      }

      .hero {
        padding: 46px 0;
      }

      .hero-mini,
      .topic-aside,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .paper-top {
        grid-template-columns: 1fr;
      }

      .paper-cover {
        min-height: 180px;
      }

      .flow-layout {
        grid-template-columns: 1fr;
      }

      .side-filter {
        position: static;
      }

      .compare-row {
        grid-template-columns: 1fr;
      }

      .form-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .container-custom {
        width: min(100% - 22px, var(--container));
      }

      .brand {
        min-width: 0;
      }

      .brand-title span {
        display: none;
      }

      .hero-actions,
      .cta-actions,
      .nav-actions {
        grid-template-columns: 1fr;
        width: 100%;
      }

      .btn-primary-custom,
      .btn-ghost,
      .btn-line {
        width: 100%;
      }

      .topic-card,
      .process-card,
      .recommend-card,
      .cta-box,
      .footer-shell {
        padding: 18px;
      }

      .review-item {
        min-width: 260px;
      }

      .copyright {
        flex-direction: column;
      }
    }