/* roulang page: index */
:root{
      --brand:#7c3aed;
      --brand-2:#ec4899;
      --brand-3:#22d3ee;
      --ink:#181827;
      --muted:#69677b;
      --soft:#f6f2ff;
      --soft-2:#fff1f7;
      --surface:#ffffff;
      --line:rgba(35,31,55,.12);
      --dark:#171128;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:32px;
      --shadow-sm:0 10px 26px rgba(35,31,55,.08);
      --shadow:0 22px 70px rgba(48,27,91,.16);
      --shadow-brand:0 20px 55px rgba(124,58,237,.28);
      --container:1180px;
      --nav-h:74px;
      --ease:all .22s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
      color:var(--ink);
      line-height:1.75;
      background:
        radial-gradient(circle at 8% 0%, rgba(236,72,153,.16), transparent 34%),
        radial-gradient(circle at 92% 12%, rgba(34,211,238,.14), transparent 32%),
        linear-gradient(180deg,#fbfaff 0%,#fff 38%,#faf7ff 100%);
      overflow-x:hidden;
      padding-bottom:0;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--brand)}
    img{max-width:100%;height:auto;display:block}
    button,input{font:inherit}
    input:focus,button:focus,a:focus,.btn:focus{
      outline:3px solid rgba(124,58,237,.22)!important;
      outline-offset:3px;
      box-shadow:none!important;
    }
    .container-xl{max-width:var(--container)}
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      height:var(--nav-h);
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(35,31,55,.08);
    }
    .navbar{min-height:var(--nav-h);padding:0}
    .navbar-brand{
      display:flex;
      align-items:center;
      gap:12px;
      font-weight:900;
      letter-spacing:-.02em;
      color:var(--ink);
      max-width:64%;
      white-space:normal;
      line-height:1.15;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:var(--shadow-brand);
      flex:0 0 auto;
    }
    .nav-link{
      color:#4c4860;
      font-weight:800;
      padding:10px 16px!important;
      border-radius:999px;
    }
    .nav-link:hover,.nav-link.active{
      color:var(--brand);
      background:rgba(124,58,237,.09);
    }
    .nav-cta{
      border:0;
      color:#fff!important;
      font-weight:900;
      border-radius:999px;
      padding:11px 18px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 12px 30px rgba(124,58,237,.22);
    }
    .nav-cta:hover{transform:translateY(-2px);color:#fff!important;box-shadow:0 18px 42px rgba(124,58,237,.3)}
    main{overflow:hidden}
    section{position:relative}
    .section-pad{padding:82px 0}
    .section-head{margin-bottom:30px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;
      border:1px solid rgba(124,58,237,.16);
      color:var(--brand);
      background:rgba(255,255,255,.78);
      border-radius:999px;
      font-size:13px;
      font-weight:900;
      box-shadow:var(--shadow-sm);
    }
    .section-title{
      margin:14px 0 10px;
      font-size:clamp(28px,4vw,46px);
      font-weight:950;
      letter-spacing:-.045em;
      line-height:1.12;
    }
    .section-desc{
      color:var(--muted);
      max-width:760px;
      font-size:17px;
      margin:0;
    }
    .hero{
      min-height:620px;
      display:flex;
      align-items:center;
      padding:78px 0 58px;
      background:
        linear-gradient(135deg,rgba(124,58,237,.08),rgba(236,72,153,.08)),
        radial-gradient(circle at 50% 28%,rgba(255,255,255,.92),transparent 42%);
    }
    .hero-panel{
      max-width:1010px;
      margin:0 auto;
      text-align:center;
      padding:48px;
      border-radius:42px;
      border:1px solid rgba(255,255,255,.86);
      background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,.66));
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero-panel:before{
      content:"";
      position:absolute;inset:-2px;
      background:
        radial-gradient(circle at 18% 22%,rgba(236,72,153,.18),transparent 24%),
        radial-gradient(circle at 82% 18%,rgba(34,211,238,.17),transparent 22%);
      pointer-events:none;
    }
    .hero-content{position:relative;z-index:1}
    h1{
      margin:18px auto 16px;
      max-width:920px;
      font-size:clamp(34px,6vw,72px);
      line-height:1.02;
      letter-spacing:-.06em;
      font-weight:950;
    }
    .gradient-text{
      background:linear-gradient(135deg,var(--brand),var(--brand-2) 55%,#f59e0b);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-intro{
      max-width:820px;
      margin:0 auto 26px;
      color:#555067;
      font-size:18px;
    }
    .search-wrap{
      display:flex;
      align-items:center;
      gap:12px;
      max-width:760px;
      margin:0 auto 22px;
      background:#fff;
      border:1px solid rgba(124,58,237,.16);
      border-radius:22px;
      padding:10px;
      box-shadow:0 18px 42px rgba(31,20,62,.1);
    }
    .search-wrap i{color:var(--brand);font-size:20px;margin-left:12px}
    .search-input{
      flex:1;
      min-width:0;
      border:0;
      color:var(--ink);
      padding:12px 4px;
      background:transparent;
    }
    .search-input::placeholder{color:#9a96a8}
    .btn-brand,.btn-soft,.btn-darkline{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      border-radius:999px;
      padding:12px 20px;
      font-weight:900;
      border:1px solid transparent;
      transition:var(--ease);
      white-space:nowrap;
    }
    .btn-brand{
      color:#fff!important;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 16px 34px rgba(124,58,237,.24);
    }
    .btn-brand:hover{transform:translateY(-2px);box-shadow:0 22px 46px rgba(124,58,237,.32)}
    .btn-soft{
      color:var(--brand)!important;
      background:rgba(124,58,237,.09);
      border-color:rgba(124,58,237,.14);
    }
    .btn-soft:hover{background:rgba(124,58,237,.14);transform:translateY(-2px)}
    .btn-darkline{
      color:#fff!important;
      background:rgba(255,255,255,.12);
      border-color:rgba(255,255,255,.26);
    }
    .btn-darkline:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
    .quick-tags{
      display:flex;flex-wrap:wrap;justify-content:center;gap:10px;
      margin:16px auto 0;
      max-width:850px;
    }
    .quick-tag{
      display:inline-flex;align-items:center;gap:8px;
      padding:9px 13px;
      border-radius:999px;
      color:#403b54;
      font-weight:800;
      background:rgba(255,255,255,.72);
      border:1px solid rgba(35,31,55,.08);
    }
    .quick-tag:hover{border-color:rgba(124,58,237,.28);background:#fff;transform:translateY(-2px)}
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin:28px auto 0;
      max-width:760px;
    }
    .metric-pill{
      padding:16px 14px;
      border-radius:22px;
      background:rgba(255,255,255,.78);
      border:1px solid rgba(255,255,255,.9);
      box-shadow:var(--shadow-sm);
    }
    .metric-num{display:block;font-size:24px;font-weight:950;color:var(--brand);line-height:1}
    .metric-label{display:block;color:var(--muted);font-size:13px;margin-top:6px}
    .story-band{
      padding:30px 0;
      background:linear-gradient(135deg,var(--dark),#2a1548);
      color:#fff;
    }
    .band-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px;align-items:center}
    .band-title{font-size:28px;font-weight:950;letter-spacing:-.03em;margin:0 0 8px}
    .band-text{margin:0;color:rgba(255,255,255,.72)}
    .band-badges{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
    .data-badge{
      display:inline-flex;align-items:center;gap:8px;
      border-radius:999px;
      padding:10px 13px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.16);
      color:#fff;
      font-weight:850;
    }
    .card-modern{
      height:100%;
      border:1px solid rgba(35,31,55,.09);
      border-radius:var(--radius-lg);
      background:rgba(255,255,255,.82);
      box-shadow:var(--shadow-sm);
      transition:var(--ease);
      overflow:hidden;
    }
    .card-modern:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(124,58,237,.18)}
    .split-card{
      padding:30px;
      border-radius:var(--radius-lg);
      background:linear-gradient(135deg,#fff,#faf6ff);
      border:1px solid rgba(124,58,237,.12);
      box-shadow:var(--shadow-sm);
    }
    .step-list{display:grid;gap:14px;margin-top:22px}
    .step-item{
      display:grid;
      grid-template-columns:46px 1fr;
      gap:14px;
      align-items:start;
      padding:16px;
      border-radius:20px;
      background:#fff;
      border:1px solid rgba(35,31,55,.08);
    }
    .step-no{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;
      font-weight:950;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
    }
    .step-item strong{display:block;font-size:17px;margin-bottom:2px}
    .step-item p{margin:0;color:var(--muted);font-size:14px}
    .progress-shell{
      padding:30px;
      border-radius:36px;
      background:
        radial-gradient(circle at 10% 5%,rgba(236,72,153,.18),transparent 28%),
        linear-gradient(135deg,#ffffff,#f7f2ff);
      border:1px solid rgba(124,58,237,.12);
      box-shadow:var(--shadow);
    }
    .progress-stage{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:12px;
      margin-top:22px;
    }
    .stage{
      position:relative;
      padding:18px 14px;
      border-radius:22px;
      background:#fff;
      border:1px solid rgba(35,31,55,.08);
    }
    .stage.active{border-color:rgba(124,58,237,.38);box-shadow:0 14px 34px rgba(124,58,237,.13)}
    .stage span{font-size:12px;color:var(--muted);font-weight:850}
    .stage strong{display:block;margin-top:5px;font-size:18px}
    .bar{
      height:12px;
      border-radius:999px;
      background:rgba(124,58,237,.1);
      overflow:hidden;
      margin-top:20px;
    }
    .bar i{
      display:block;height:100%;width:68%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--brand-3));
    }
    .rank-wrap{
      border-radius:34px;
      overflow:hidden;
      border:1px solid rgba(35,31,55,.1);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .rank-row{
      display:grid;
      grid-template-columns:70px 1.2fr .55fr .55fr .55fr;
      gap:14px;
      align-items:center;
      padding:18px 22px;
      border-bottom:1px solid rgba(35,31,55,.08);
      transition:var(--ease);
    }
    .rank-row:last-child{border-bottom:0}
    .rank-row:hover{background:#fbf8ff}
    .rank-head{background:#211638;color:#fff;font-weight:900}
    .rank-title strong{display:block;font-size:16px}
    .rank-title span,.rank-cell span{display:block;color:var(--muted);font-size:13px}
    .rank-head .rank-cell span,.rank-head .rank-title span{color:rgba(255,255,255,.62)}
    .rank-no{
      width:38px;height:38px;border-radius:14px;
      display:grid;place-items:center;
      font-weight:950;
      background:rgba(124,58,237,.1);
      color:var(--brand);
    }
    .rank-row:nth-child(2) .rank-no{background:linear-gradient(135deg,#f59e0b,#ec4899);color:#fff}
    .rank-cell{font-weight:900}
    .trend-up{color:#10b981}
    .matrix-grid{
      display:grid;
      grid-template-columns:repeat(6,1fr);
      gap:14px;
    }
    .matrix-item{
      min-height:126px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      padding:18px;
      border-radius:26px;
      background:#fff;
      border:1px solid rgba(35,31,55,.09);
      box-shadow:var(--shadow-sm);
      transition:var(--ease);
    }
    .matrix-item:hover{transform:translateY(-5px);border-color:rgba(124,58,237,.25);box-shadow:var(--shadow)}
    .matrix-icon{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
    }
    .matrix-item strong{font-size:16px;margin-top:14px}
    .matrix-item span{color:var(--muted);font-size:13px}
    .vertical-flow{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:22px;
      align-items:stretch;
    }
    .poster-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:16px;
    }
    .poster-card{
      position:relative;
      min-height:270px;
      border-radius:30px;
      padding:18px;
      overflow:hidden;
      color:#fff;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      box-shadow:var(--shadow-sm);
      transition:var(--ease);
      background:
        linear-gradient(180deg,rgba(17,12,31,.14),rgba(17,12,31,.78)),
        radial-gradient(circle at 30% 12%,rgba(255,255,255,.28),transparent 24%),
        linear-gradient(135deg,var(--brand),var(--brand-2));
    }
    .poster-card:nth-child(2){background:linear-gradient(180deg,rgba(17,12,31,.1),rgba(17,12,31,.82)),radial-gradient(circle at 70% 20%,rgba(34,211,238,.42),transparent 26%),linear-gradient(135deg,#0f172a,#7c3aed)}
    .poster-card:nth-child(3){background:linear-gradient(180deg,rgba(17,12,31,.1),rgba(17,12,31,.84)),radial-gradient(circle at 30% 22%,rgba(245,158,11,.36),transparent 26%),linear-gradient(135deg,#831843,#ec4899)}
    .poster-card:hover{transform:translateY(-6px) rotate(-1deg);box-shadow:var(--shadow)}
    .poster-tag{
      align-self:flex-start;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.16);
      border:1px solid rgba(255,255,255,.24);
      font-size:12px;
      font-weight:900;
    }
    .poster-card h3{font-size:22px;font-weight:950;line-height:1.15;margin:0 0 8px}
    .poster-card p{font-size:13px;color:rgba(255,255,255,.76);margin:0 0 12px}
    .poster-card a{color:#fff;font-weight:950}
    .filter-panel{
      padding:28px;
      border-radius:34px;
      background:#fff;
      border:1px solid rgba(35,31,55,.09);
      box-shadow:var(--shadow-sm);
    }
    .filter-list{display:grid;gap:12px;margin-top:18px}
    .filter-item{
      display:flex;justify-content:space-between;align-items:center;gap:12px;
      padding:14px 16px;border-radius:18px;
      background:#faf8ff;
      border:1px solid rgba(124,58,237,.1);
      font-weight:850;
    }
    .filter-item em{font-style:normal;color:var(--brand);font-size:13px}
    .news-zone{
      display:grid;
      grid-template-columns:1.35fr .65fr;
      gap:22px;
    }
    .news-list,.recommend-box{
      border-radius:34px;
      background:#fff;
      border:1px solid rgba(35,31,55,.09);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .news-item{
      display:grid;
      grid-template-columns:110px 1fr auto;
      gap:16px;
      align-items:center;
      padding:18px 20px;
      border-bottom:1px solid rgba(35,31,55,.08);
    }
    .news-item:last-child{border-bottom:0}
    .news-date{
      color:var(--brand);
      font-weight:950;
      padding:8px 10px;
      border-radius:16px;
      background:rgba(124,58,237,.09);
      text-align:center;
    }
    .news-item h3{font-size:17px;margin:0 0 3px;font-weight:950}
    .news-item p{margin:0;color:var(--muted);font-size:14px}
    .news-arrow{
      width:38px;height:38px;border-radius:50%;
      display:grid;place-items:center;
      background:#faf8ff;color:var(--brand);
    }
    .news-item:hover{background:#fbf8ff}
    .recommend-box{padding:24px}
    .mini-card{
      padding:16px;border-radius:22px;
      background:linear-gradient(135deg,#fbf8ff,#fff1f7);
      border:1px solid rgba(124,58,237,.1);
      margin-top:14px;
    }
    .mini-card strong{display:block;font-size:16px}
    .mini-card span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .faq-wrap{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:28px;
      align-items:start;
    }
    .accordion-item{
      border:1px solid rgba(35,31,55,.09)!important;
      border-radius:22px!important;
      margin-bottom:12px;
      overflow:hidden;
      box-shadow:var(--shadow-sm);
      background:#fff;
    }
    .accordion-button{
      padding:18px 20px;
      font-weight:950;
      color:var(--ink);
      background:#fff!important;
      box-shadow:none!important;
    }
    .accordion-button:not(.collapsed){color:var(--brand)}
    .accordion-button::after{filter:hue-rotate(40deg)}
    .accordion-body{color:var(--muted);padding:0 20px 20px}
    .cta-section{padding:30px 0 88px}
    .cta-box{
      position:relative;
      overflow:hidden;
      border-radius:42px;
      padding:48px;
      color:#fff;
      background:
        radial-gradient(circle at 20% 18%,rgba(255,255,255,.2),transparent 24%),
        radial-gradient(circle at 90% 20%,rgba(34,211,238,.24),transparent 28%),
        linear-gradient(135deg,#22113b,var(--brand),var(--brand-2));
      box-shadow:var(--shadow-brand);
    }
    .cta-box h2{font-size:clamp(28px,4vw,48px);font-weight:950;letter-spacing:-.04em;line-height:1.12;margin:0 0 12px}
    .cta-box p{color:rgba(255,255,255,.78);max-width:720px;margin:0 0 22px}
    .claim-form{
      display:flex;
      gap:12px;
      max-width:690px;
      padding:10px;
      border-radius:22px;
      background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.22);
      backdrop-filter:blur(10px);
    }
    .claim-form input{
      flex:1;min-width:0;
      border:0;border-radius:16px;
      padding:13px 15px;
      color:#fff;
      background:rgba(255,255,255,.13);
    }
    .claim-form input::placeholder{color:rgba(255,255,255,.68)}
    .btn-white{
      border:0;border-radius:16px;
      padding:13px 18px;
      color:var(--brand);
      background:#fff;
      font-weight:950;
      transition:var(--ease);
      white-space:nowrap;
    }
    .btn-white:hover{transform:translateY(-2px);background:#fff7fb}
    .site-footer{
      color:#d8d2e7;
      background:#120b20;
      padding:54px 0 34px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:26px;
      align-items:start;
    }
    .footer-brand{
      display:flex;align-items:center;gap:12px;
      color:#fff;font-weight:950;font-size:20px;margin-bottom:12px;
    }
    .footer-text{color:#a9a1ba;max-width:690px;margin:0}
    .footer-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{
      color:#d8d2e7;
      padding:9px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.08);
      font-weight:800;
    }
    .footer-links a:hover{background:rgba(255,255,255,.12);color:#fff}
    .copyright{
      margin-top:30px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8d849f;
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
      font-size:14px;
    }
    .mobile-tabs{
      display:none;
      position:fixed;
      left:12px;right:12px;bottom:12px;
      z-index:1001;
      grid-template-columns:repeat(4,1fr);
      gap:8px;
      padding:9px;
      border-radius:24px;
      background:rgba(255,255,255,.9);
      backdrop-filter:blur(18px);
      border:1px solid rgba(35,31,55,.1);
      box-shadow:0 18px 48px rgba(31,20,62,.18);
    }
    .mobile-tabs a{
      display:flex;flex-direction:column;align-items:center;justify-content:center;
      gap:4px;
      min-height:54px;
      color:#6b657c;
      border-radius:18px;
      font-size:12px;
      font-weight:900;
    }
    .mobile-tabs a i{font-size:17px}
    .mobile-tabs a.active,.mobile-tabs a:hover{color:var(--brand);background:rgba(124,58,237,.09)}
    @media (max-width:1024px){
      .matrix-grid{grid-template-columns:repeat(3,1fr)}
      .vertical-flow,.news-zone,.faq-wrap,.band-grid{grid-template-columns:1fr}
      .band-badges{justify-content:flex-start}
      .poster-grid{grid-template-columns:repeat(3,1fr)}
      .rank-row{grid-template-columns:58px 1.3fr .55fr .55fr;gap:10px}
      .rank-row .rank-cell:nth-child(5){display:none}
    }
    @media (max-width:768px){
      body{padding-bottom:88px}
      .site-header{height:auto}
      .navbar{padding:12px 0;min-height:auto}
      .navbar-brand{font-size:15px;max-width:76%}
      .brand-mark{width:38px;height:38px;border-radius:14px}
      .desktop-nav{display:none!important}
      .mobile-tabs{display:grid}
      .hero{padding:42px 0 34px;min-height:auto}
      .hero-panel{padding:30px 18px;border-radius:30px}
      .hero-intro{font-size:16px}
      .search-wrap{flex-direction:column;align-items:stretch;border-radius:24px}
      .search-wrap i{display:none}
      .search-input{padding:12px 14px;text-align:center}
      .search-wrap .btn-brand{width:100%}
      .hero-metrics{grid-template-columns:1fr;gap:10px}
      .section-pad{padding:58px 0}
      .progress-stage{grid-template-columns:1fr 1fr}
      .rank-head{display:none}
      .rank-row{
        grid-template-columns:46px 1fr;
        padding:16px;
      }
      .rank-cell{display:flex;justify-content:space-between;color:var(--muted);font-size:14px}
      .rank-cell:before{content:attr(data-label);font-weight:850;color:#918b9e}
      .rank-row .rank-cell:nth-child(5){display:flex}
      .matrix-grid{grid-template-columns:repeat(2,1fr)}
      .poster-grid{grid-template-columns:1fr}
      .poster-card{min-height:220px}
      .news-item{grid-template-columns:1fr;gap:8px}
      .news-date{width:max-content}
      .news-arrow{display:none}
      .claim-form{flex-direction:column}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .container-xl{padding-left:18px;padding-right:18px}
      h1{font-size:34px}
      .section-title{font-size:28px}
      .quick-tags{justify-content:flex-start}
      .metric-num{font-size:22px}
      .split-card,.progress-shell,.filter-panel,.cta-box{padding:22px;border-radius:28px}
      .progress-stage,.matrix-grid{grid-template-columns:1fr}
      .cta-section{padding-bottom:40px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }

/* 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}