/* roulang page: index */
:root{
      --bg:#f6f7fb;
      --bg-soft:#ffffff;
      --bg-dark:#111827;
      --bg-deep:#0b1020;
      --primary:#7c3aed;
      --primary-2:#06b6d4;
      --primary-3:#f97316;
      --text:#172033;
      --muted:#657085;
      --muted-2:#8a94a7;
      --line:#e5e7ef;
      --line-dark:rgba(255,255,255,.13);
      --success:#10b981;
      --warning:#f59e0b;
      --danger:#ef4444;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --shadow-sm:0 10px 26px rgba(15,23,42,.08);
      --shadow:0 22px 60px rgba(17,24,39,.13);
      --shadow-hover:0 28px 75px rgba(17,24,39,.18);
      --gradient:linear-gradient(135deg,#7c3aed 0%,#06b6d4 52%,#22c55e 100%);
      --gradient-warm:linear-gradient(135deg,#ff7a45 0%,#f43f5e 48%,#7c3aed 100%);
      --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(--text);
      background:
        radial-gradient(circle at 8% 3%,rgba(124,58,237,.14),transparent 28%),
        radial-gradient(circle at 92% 8%,rgba(6,182,212,.13),transparent 30%),
        linear-gradient(180deg,#fbfcff 0%,var(--bg) 45%,#fff 100%);
      line-height:1.65;
      text-rendering:optimizeLegibility;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,box-shadow .2s ease,transform .2s ease}
    a:hover{color:var(--primary)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0}
    ::selection{background:rgba(124,58,237,.18);color:#22123b}
    :focus-visible{outline:3px solid rgba(6,182,212,.36);outline-offset:3px;border-radius:10px}

    .container-page{
      width:min(100% - 32px,var(--container));
      margin-inline:auto;
    }
    .section{
      padding:76px 0;
      position:relative;
    }
    .section-tight{padding:58px 0}
    .section-heading{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:28px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--primary);
      background:rgba(124,58,237,.09);
      border:1px solid rgba(124,58,237,.15);
      padding:7px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:800;
      letter-spacing:.02em;
      margin-bottom:12px;
    }
    .section-title{
      margin:0;
      font-weight:900;
      letter-spacing:-.035em;
      font-size:clamp(28px,3.4vw,44px);
      line-height:1.18;
    }
    .section-desc{
      max-width:640px;
      margin:12px 0 0;
      color:var(--muted);
      font-size:16px;
    }
    .text-gradient{
      background:var(--gradient);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }

    .btn-brand,
    .btn-ghost,
    .btn-dark-soft,
    .btn-light-soft{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      font-weight:850;
      line-height:1;
      transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
      white-space:nowrap;
    }
    .btn-brand{
      color:#fff;
      background:var(--gradient);
      box-shadow:0 16px 34px rgba(124,58,237,.28);
    }
    .btn-brand:hover{
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 22px 46px rgba(124,58,237,.35);
    }
    .btn-ghost{
      color:var(--text);
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .btn-ghost:hover{
      color:var(--primary);
      transform:translateY(-2px);
      border-color:rgba(124,58,237,.24);
      box-shadow:0 20px 44px rgba(15,23,42,.1);
    }
    .btn-dark-soft{
      color:#fff;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.18);
    }
    .btn-dark-soft:hover{
      color:#fff;
      background:rgba(255,255,255,.16);
      transform:translateY(-2px);
    }
    .btn-light-soft{
      color:#fff;
      background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.2);
    }
    .btn-light-soft:hover{
      color:#fff;
      background:rgba(255,255,255,.22);
      transform:translateY(-2px);
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      background:rgba(255,255,255,.86);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(229,231,239,.78);
      box-shadow:0 10px 28px rgba(15,23,42,.05);
    }
    .promo-bar{
      background:linear-gradient(90deg,#12182b 0%,#2b155b 52%,#063447 100%);
      color:#eaf2ff;
      font-size:13px;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .promo-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }
    .promo-text{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
    }
    .promo-text strong{
      color:#fff;
      font-weight:850;
    }
    .promo-dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:#22c55e;
      box-shadow:0 0 0 6px rgba(34,197,94,.14);
      flex:0 0 auto;
    }
    .promo-actions{
      display:flex;
      align-items:center;
      gap:14px;
      flex:0 0 auto;
      color:#dce9ff;
    }
    .promo-actions span{
      display:inline-flex;
      align-items:center;
      gap:7px;
      opacity:.92;
    }
    .main-nav{
      min-height:var(--nav-height);
      padding:0;
    }
    .navbar-brand.logo{
      display:flex;
      align-items:center;
      gap:12px;
      margin-right:26px;
      color:var(--text);
      font-weight:950;
      letter-spacing:-.03em;
      font-size:20px;
    }
    .logo-mark{
      width:42px;
      height:42px;
      border-radius:15px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--gradient);
      box-shadow:0 12px 30px rgba(124,58,237,.28);
    }
    .nav-pill{
      display:flex;
      align-items:center;
      gap:6px;
      padding:10px 14px!important;
      border-radius:999px;
      color:var(--muted)!important;
      font-weight:800;
    }
    .nav-pill:hover,
    .nav-pill.active{
      color:var(--primary)!important;
      background:rgba(124,58,237,.09);
    }
    .nav-search{
      width:min(430px,34vw);
      position:relative;
      margin-left:auto;
    }
    .nav-search input{
      width:100%;
      border:1px solid var(--line);
      border-radius:999px;
      padding:12px 46px 12px 18px;
      background:#f9fafc;
      color:var(--text);
      transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .nav-search input:focus{
      background:#fff;
      border-color:rgba(124,58,237,.42);
      box-shadow:0 0 0 4px rgba(124,58,237,.10);
      outline:0;
    }
    .nav-search button{
      position:absolute;
      right:5px;
      top:5px;
      width:38px;
      height:38px;
      border-radius:50%;
      color:#fff;
      background:var(--gradient);
      display:grid;
      place-items:center;
    }
    .nav-icons{
      display:flex;
      align-items:center;
      gap:10px;
      margin-left:14px;
    }
    .icon-btn{
      width:43px;
      height:43px;
      display:grid;
      place-items:center;
      border-radius:15px;
      color:var(--text);
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 8px 18px rgba(15,23,42,.05);
      position:relative;
    }
    .icon-btn:hover{
      transform:translateY(-2px);
      color:var(--primary);
      border-color:rgba(124,58,237,.24);
      box-shadow:0 14px 30px rgba(15,23,42,.1);
    }
    .icon-dot{
      position:absolute;
      top:9px;
      right:9px;
      width:7px;
      height:7px;
      background:#f43f5e;
      border-radius:50%;
      border:2px solid #fff;
    }
    .navbar-toggler{
      border:1px solid var(--line);
      border-radius:14px;
      padding:9px 11px;
      box-shadow:none!important;
    }

    .hero{
      padding:42px 0 72px;
    }
    .hero-shell{
      background:
        radial-gradient(circle at 18% 18%,rgba(124,58,237,.42),transparent 28%),
        radial-gradient(circle at 86% 14%,rgba(6,182,212,.35),transparent 28%),
        linear-gradient(135deg,#0b1020 0%,#111827 58%,#111c3a 100%);
      color:#fff;
      border-radius:36px;
      box-shadow:0 34px 90px rgba(11,16,32,.28);
      overflow:hidden;
      position:relative;
      border:1px solid rgba(255,255,255,.1);
    }
    .hero-shell:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px),
        linear-gradient(180deg,rgba(255,255,255,.05) 1px,transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(90deg,rgba(0,0,0,.55),transparent 78%);
      pointer-events:none;
    }
    .hero-content{
      position:relative;
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:28px;
      padding:46px;
      align-items:stretch;
    }
    .hero-left{
      min-height:480px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:28px;
    }
    .hero-eyebrow{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:10px;
    }
    .hero-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 13px;
      border-radius:999px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.16);
      color:#e7eeff;
      font-size:13px;
      font-weight:850;
    }
    .hero h1{
      margin:18px 0 0;
      max-width:760px;
      font-size:clamp(34px,5.3vw,66px);
      line-height:1.04;
      font-weight:950;
      letter-spacing:-.06em;
    }
    .hero-intro{
      max-width:710px;
      color:#d5ddef;
      font-size:18px;
      margin:20px 0 0;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      max-width:720px;
    }
    .metric-tile{
      padding:16px;
      border-radius:20px;
      background:rgba(255,255,255,.09);
      border:1px solid rgba(255,255,255,.14);
      backdrop-filter:blur(10px);
    }
    .metric-tile strong{
      display:block;
      font-size:26px;
      line-height:1;
      letter-spacing:-.03em;
    }
    .metric-tile span{
      display:block;
      margin-top:8px;
      color:#c3cce1;
      font-size:13px;
    }
    .hero-board{
      display:grid;
      gap:16px;
    }
    .board-card{
      background:rgba(255,255,255,.94);
      color:var(--text);
      border-radius:28px;
      padding:22px;
      box-shadow:0 28px 70px rgba(0,0,0,.22);
      border:1px solid rgba(255,255,255,.42);
    }
    .board-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:18px;
    }
    .board-title{
      font-weight:950;
      font-size:18px;
      letter-spacing:-.02em;
    }
    .live-tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 10px;
      border-radius:999px;
      background:rgba(16,185,129,.12);
      color:#047857;
      font-size:12px;
      font-weight:900;
    }
    .rank-list{
      display:grid;
      gap:12px;
    }
    .rank-item{
      display:grid;
      grid-template-columns:34px 1fr auto;
      gap:12px;
      align-items:center;
      padding:12px;
      border-radius:18px;
      background:#f7f8fc;
      border:1px solid rgba(229,231,239,.78);
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .rank-item:hover{
      transform:translateX(3px);
      background:#fff;
      box-shadow:0 12px 28px rgba(15,23,42,.08);
    }
    .rank-no{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      border-radius:12px;
      color:#fff;
      background:var(--gradient);
      font-weight:950;
    }
    .rank-name{
      min-width:0;
    }
    .rank-name strong{
      display:block;
      font-weight:900;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .rank-name span{
      color:var(--muted);
      font-size:13px;
    }
    .rank-score{
      font-weight:950;
      color:var(--primary);
    }
    .signal-card{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
    }
    .signal-box{
      padding:18px;
      border-radius:24px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
      color:#fff;
    }
    .signal-box i{
      width:40px;
      height:40px;
      display:grid;
      place-items:center;
      border-radius:15px;
      background:rgba(255,255,255,.16);
      margin-bottom:12px;
    }
    .signal-box strong{
      display:block;
      font-size:19px;
      margin-bottom:4px;
    }
    .signal-box span{
      color:#cbd5e1;
      font-size:13px;
    }

    .update-layout{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:24px;
      align-items:start;
    }
    .timeline-card,
    .matrix-card,
    .compare-card,
    .faq-card,
    .article-panel,
    .safe-card,
    .app-card,
    .form-card{
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .timeline-card{
      padding:10px;
    }
    .timeline-item{
      display:grid;
      grid-template-columns:88px 1fr;
      gap:18px;
      padding:20px;
      border-radius:24px;
      transition:background .2s ease,transform .2s ease;
    }
    .timeline-item + .timeline-item{
      border-top:1px solid #eef0f6;
    }
    .timeline-item:hover{
      background:#fafbff;
      transform:translateY(-2px);
    }
    .time-badge{
      display:inline-flex;
      justify-content:center;
      align-items:center;
      align-self:start;
      min-height:36px;
      padding:8px 10px;
      border-radius:999px;
      color:#4c1d95;
      background:rgba(124,58,237,.1);
      font-size:13px;
      font-weight:900;
    }
    .timeline-item h3{
      margin:0 0 6px;
      font-size:18px;
      font-weight:950;
      letter-spacing:-.02em;
    }
    .timeline-item p{
      margin:0;
      color:var(--muted);
      font-size:15px;
    }
    .service-matrix{
      display:grid;
      gap:14px;
    }
    .matrix-card{
      padding:22px;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .matrix-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow);
      border-color:rgba(124,58,237,.22);
    }
    .matrix-head{
      display:flex;
      align-items:center;
      gap:14px;
      margin-bottom:10px;
    }
    .feature-icon{
      width:48px;
      height:48px;
      border-radius:18px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--gradient);
      box-shadow:0 14px 28px rgba(124,58,237,.22);
      flex:0 0 auto;
    }
    .matrix-card h3{
      margin:0;
      font-size:18px;
      font-weight:950;
    }
    .matrix-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
    }

    .answer-grid{
      display:grid;
      grid-template-columns:.86fr 1.14fr;
      gap:24px;
      align-items:stretch;
    }
    .compare-card{
      padding:26px;
      background:
        linear-gradient(180deg,#fff 0%,#fbfbff 100%);
    }
    .compare-row{
      padding:16px 0;
      border-bottom:1px solid #edf0f6;
    }
    .compare-row:last-child{border-bottom:0}
    .compare-head{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      margin-bottom:10px;
      font-weight:900;
    }
    .compare-head span:last-child{
      color:var(--primary);
      font-size:13px;
    }
    .bar{
      height:10px;
      background:#eef1f7;
      border-radius:999px;
      overflow:hidden;
    }
    .bar-fill{
      height:100%;
      border-radius:999px;
      background:var(--gradient);
    }
    .accordion{
      --bs-accordion-border-width:0;
      --bs-accordion-bg:transparent;
      display:grid;
      gap:12px;
    }
    .accordion-item{
      border:1px solid var(--line)!important;
      border-radius:22px!important;
      overflow:hidden;
      background:#fff;
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .accordion-button{
      padding:18px 20px;
      font-weight:950;
      color:var(--text);
      background:#fff;
      box-shadow:none!important;
      border-radius:22px!important;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary);
      background:linear-gradient(90deg,rgba(124,58,237,.08),rgba(6,182,212,.06));
    }
    .accordion-button:after{
      filter:saturate(.6);
    }
    .accordion-body{
      color:var(--muted);
      padding:0 20px 20px;
      font-size:15px;
    }

    .entry-strip{
      background:#fff;
      border:1px solid var(--line);
      border-radius:34px;
      box-shadow:var(--shadow-sm);
      padding:22px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .entry-item{
      min-height:138px;
      border-radius:24px;
      padding:20px;
      background:linear-gradient(180deg,#fafbff 0%,#fff 100%);
      border:1px solid #edf0f6;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .entry-item:hover{
      transform:translateY(-4px);
      box-shadow:0 18px 42px rgba(15,23,42,.1);
      border-color:rgba(6,182,212,.28);
    }
    .entry-item i{
      width:42px;
      height:42px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:rgba(6,182,212,.1);
      color:#0891b2;
      margin-bottom:16px;
    }
    .entry-item strong{
      font-size:17px;
      font-weight:950;
    }
    .entry-item span{
      color:var(--muted);
      font-size:14px;
      margin-top:6px;
    }

    .news-layout{
      display:grid;
      grid-template-columns:1.35fr .65fr;
      gap:24px;
      align-items:start;
    }
    .article-panel{
      padding:12px;
    }
    .article-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:2px;
    }
    .article-list li a{
      display:grid;
      grid-template-columns:1fr auto;
      gap:16px;
      align-items:center;
      padding:18px;
      border-radius:20px;
      border:1px solid transparent;
    }
    .article-list li a:hover{
      background:#fafbff;
      border-color:#edf0f6;
      transform:translateX(3px);
    }
    .article-title{
      min-width:0;
    }
    .article-title strong{
      display:block;
      font-size:17px;
      font-weight:950;
      color:var(--text);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .article-title span{
      display:block;
      color:var(--muted);
      margin-top:4px;
      font-size:14px;
    }
    .article-meta{
      color:var(--muted-2);
      font-size:13px;
      font-weight:800;
      white-space:nowrap;
    }
    .recommend-card{
      border-radius:var(--radius-lg);
      padding:26px;
      color:#fff;
      background:
        radial-gradient(circle at 80% 20%,rgba(255,255,255,.28),transparent 25%),
        var(--gradient-warm);
      box-shadow:0 24px 58px rgba(244,63,94,.2);
      position:sticky;
      top:128px;
      overflow:hidden;
    }
    .recommend-card:after{
      content:"";
      position:absolute;
      width:160px;
      height:160px;
      border-radius:50%;
      right:-60px;
      bottom:-70px;
      background:rgba(255,255,255,.18);
    }
    .recommend-card h3{
      margin:0;
      font-size:24px;
      font-weight:950;
      letter-spacing:-.03em;
      position:relative;
      z-index:1;
    }
    .recommend-card p{
      color:rgba(255,255,255,.88);
      margin:12px 0 20px;
      position:relative;
      z-index:1;
    }
    .tag-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
      position:relative;
      z-index:1;
    }
    .tag-cloud span{
      display:inline-flex;
      padding:8px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.16);
      border:1px solid rgba(255,255,255,.2);
      font-size:13px;
      font-weight:850;
    }

    .safe-wrap{
      display:grid;
      grid-template-columns:.92fr 1.08fr;
      gap:24px;
      align-items:stretch;
    }
    .safe-hero{
      border-radius:34px;
      padding:34px;
      color:#fff;
      background:
        radial-gradient(circle at 12% 10%,rgba(6,182,212,.35),transparent 28%),
        linear-gradient(135deg,#101827 0%,#172554 100%);
      box-shadow:var(--shadow);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      min-height:420px;
      overflow:hidden;
      position:relative;
    }
    .safe-hero:after{
      content:"";
      position:absolute;
      inset:auto -30px -50px auto;
      width:230px;
      height:230px;
      border-radius:50%;
      background:rgba(124,58,237,.34);
      filter:blur(2px);
    }
    .safe-hero h2{
      margin:0;
      font-size:clamp(28px,3.4vw,44px);
      line-height:1.12;
      font-weight:950;
      letter-spacing:-.04em;
      position:relative;
      z-index:1;
    }
    .safe-hero p{
      color:#dbeafe;
      margin:14px 0 0;
      position:relative;
      z-index:1;
    }
    .safe-checks{
      display:grid;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .safe-check{
      display:flex;
      align-items:flex-start;
      gap:12px;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
    }
    .safe-check i{
      color:#67e8f9;
      margin-top:3px;
    }
    .safe-card{
      padding:24px;
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:14px;
    }
    .safe-mini{
      padding:20px;
      border-radius:24px;
      background:#fafbff;
      border:1px solid #edf0f6;
      transition:transform .22s ease,box-shadow .22s ease;
    }
    .safe-mini:hover{
      transform:translateY(-3px);
      box-shadow:0 18px 40px rgba(15,23,42,.08);
      background:#fff;
    }
    .safe-mini i{
      width:42px;
      height:42px;
      border-radius:16px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--gradient);
      margin-bottom:14px;
    }
    .safe-mini h3{
      font-size:18px;
      font-weight:950;
      margin:0 0 8px;
    }
    .safe-mini p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }

    .app-stage{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:24px;
      align-items:stretch;
    }
    .app-card{
      padding:34px;
      background:
        radial-gradient(circle at 18% 18%,rgba(124,58,237,.14),transparent 30%),
        linear-gradient(180deg,#fff 0%,#f8fbff 100%);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      min-height:410px;
    }
    .app-card h2{
      font-size:clamp(28px,3.4vw,44px);
      font-weight:950;
      line-height:1.14;
      margin:0;
      letter-spacing:-.04em;
    }
    .app-card p{
      color:var(--muted);
      margin:14px 0 0;
    }
    .app-steps{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:28px;
    }
    .app-step{
      padding:16px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .app-step strong{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      border-radius:13px;
      color:#fff;
      background:var(--gradient);
      margin-bottom:12px;
    }
    .app-step span{
      color:var(--muted);
      font-size:14px;
    }
    .form-card{
      padding:30px;
      background:#111827;
      color:#fff;
      position:relative;
      overflow:hidden;
    }
    .form-card:before{
      content:"";
      position:absolute;
      width:210px;
      height:210px;
      right:-70px;
      top:-70px;
      border-radius:50%;
      background:rgba(6,182,212,.28);
    }
    .form-card h3{
      margin:0;
      font-size:26px;
      font-weight:950;
      letter-spacing:-.03em;
      position:relative;
      z-index:1;
    }
    .form-card p{
      color:#cbd5e1;
      margin:10px 0 22px;
      position:relative;
      z-index:1;
    }
    .lead-form{
      position:relative;
      z-index:1;
      display:grid;
      gap:13px;
    }
    .form-control,
    .form-select{
      border:1px solid rgba(255,255,255,.16);
      border-radius:16px;
      padding:13px 15px;
      min-height:50px;
      background:rgba(255,255,255,.08);
      color:#fff;
      box-shadow:none!important;
    }
    .form-control::placeholder{color:#98a5bb}
    .form-select{
      color:#e5e7eb;
      background-color:rgba(255,255,255,.08);
    }
    .form-select option{color:#172033}
    .form-control:focus,
    .form-select:focus{
      border-color:rgba(6,182,212,.55);
      background:rgba(255,255,255,.12);
      outline:0;
    }
    .form-hint{
      color:#94a3b8;
      font-size:13px;
      margin:0;
    }
    .form-message{
      display:none;
      margin-top:8px;
      padding:12px 14px;
      border-radius:16px;
      color:#d1fae5;
      background:rgba(16,185,129,.13);
      border:1px solid rgba(16,185,129,.25);
      font-size:14px;
    }

    .site-footer{
      background:#0b1020;
      color:#cbd5e1;
      padding:52px 0 26px;
      position:relative;
      overflow:hidden;
    }
    .site-footer:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 15% 0%,rgba(124,58,237,.22),transparent 28%),
        radial-gradient(circle at 90% 20%,rgba(6,182,212,.18),transparent 26%);
      pointer-events:none;
    }
    .footer-inner{
      position:relative;
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:30px;
      align-items:start;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      font-size:20px;
      font-weight:950;
      letter-spacing:-.03em;
      margin-bottom:14px;
    }
    .footer-brand .logo-mark{
      box-shadow:none;
    }
    .footer-desc{
      max-width:620px;
      color:#aeb9cc;
      margin:0;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      justify-content:flex-end;
      gap:10px;
    }
    .footer-links a{
      color:#dbe4f3;
      padding:9px 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.10);
      background:rgba(255,255,255,.05);
      font-weight:800;
      font-size:14px;
    }
    .footer-links a:hover{
      color:#fff;
      background:rgba(255,255,255,.12);
      transform:translateY(-2px);
    }
    .copyright{
      position:relative;
      border-top:1px solid rgba(255,255,255,.10);
      margin-top:34px;
      padding-top:22px;
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      color:#8f9cb2;
      font-size:13px;
    }

    .floating-cta{
      position:fixed;
      right:18px;
      bottom:18px;
      z-index:1020;
      display:flex;
      align-items:center;
      gap:10px;
      padding:10px 12px 10px 16px;
      border-radius:999px;
      color:#fff;
      background:rgba(17,24,39,.86);
      backdrop-filter:blur(14px);
      border:1px solid rgba(255,255,255,.14);
      box-shadow:0 18px 50px rgba(15,23,42,.24);
    }
    .floating-cta span{
      font-size:13px;
      font-weight:850;
    }
    .floating-cta a{
      padding:9px 12px;
      border-radius:999px;
      background:var(--gradient);
      color:#fff;
      font-size:13px;
      font-weight:900;
    }
    .floating-cta a:hover{
      color:#fff;
      transform:translateY(-1px);
    }

    @media (max-width: 1024px){
      .hero-content,
      .update-layout,
      .answer-grid,
      .news-layout,
      .safe-wrap,
      .app-stage{
        grid-template-columns:1fr;
      }
      .hero-left{min-height:auto}
      .hero-board{grid-template-columns:1fr 1fr}
      .board-card{grid-column:1 / -1}
      .entry-strip{grid-template-columns:repeat(2,1fr)}
      .recommend-card{position:relative;top:auto}
      .nav-search{width:100%;margin:14px 0 0}
      .nav-icons{margin:14px 0 0}
    }

    @media (max-width: 991px){
      .main-nav{padding:12px 0}
      .navbar-collapse{
        padding:16px 0 4px;
        border-top:1px solid var(--line);
        margin-top:12px;
      }
      .nav-pill{
        width:100%;
        justify-content:flex-start;
      }
      .nav-icons{
        justify-content:flex-start;
        flex-wrap:wrap;
      }
      .promo-actions{display:none}
    }

    @media (max-width: 768px){
      .section{padding:58px 0}
      .hero{padding:28px 0 56px}
      .hero-shell{border-radius:28px}
      .hero-content{padding:28px;gap:20px}
      .hero-metrics{grid-template-columns:1fr}
      .hero-board{grid-template-columns:1fr}
      .signal-card{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr;gap:10px}
      .safe-card{grid-template-columns:1fr}
      .app-steps{grid-template-columns:1fr}
      .footer-inner{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
      .section-heading{
        display:block;
      }
    }

    @media (max-width: 520px){
      .container-page{width:min(100% - 22px,var(--container))}
      .promo-inner{min-height:34px}
      .promo-text{
        font-size:12px;
        white-space:nowrap;
        overflow:hidden;
        text-overflow:ellipsis;
      }
      .navbar-brand.logo{
        font-size:17px;
        gap:9px;
      }
      .logo-mark{
        width:38px;
        height:38px;
        border-radius:14px;
      }
      .hero-content{padding:22px}
      .hero h1{
        font-size:34px;
        letter-spacing:-.045em;
      }
      .hero-intro{font-size:16px}
      .hero-actions .btn-brand,
      .hero-actions .btn-dark-soft,
      .btn-ghost{
        width:100%;
      }
      .entry-strip{grid-template-columns:1fr;padding:14px}
      .article-list li a{
        grid-template-columns:1fr;
        gap:6px;
      }
      .article-title strong{
        white-space:normal;
      }
      .app-card,
      .form-card,
      .safe-hero{
        padding:24px;
        border-radius:26px;
      }
      .floating-cta{
        left:12px;
        right:12px;
        justify-content:space-between;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}