/* roulang page: index */
:root{
      --bg:#080a14;
      --bg-2:#0d1020;
      --panel:#11162a;
      --panel-2:#151b32;
      --text:#f7f8ff;
      --muted:#aab3d0;
      --muted-2:#7f8aa8;
      --line:rgba(148,163,184,.22);
      --line-strong:rgba(125,92,255,.38);
      --primary:#8b5cf6;
      --primary-2:#22d3ee;
      --primary-3:#ff3d81;
      --success:#38d996;
      --warning:#fbbf24;
      --danger:#fb7185;
      --white:#ffffff;
      --shadow:0 24px 70px rgba(0,0,0,.38);
      --shadow-soft:0 18px 45px rgba(2,6,23,.22);
      --radius-xl:30px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --container:1180px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      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 18% 4%, rgba(139,92,246,.28), transparent 34%),
        radial-gradient(circle at 88% 12%, rgba(34,211,238,.20), transparent 30%),
        linear-gradient(180deg,#080a14 0%,#0b0f1d 46%,#090b14 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--primary-2)}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(34,211,238,.25);color:#fff}
    .container-custom{width:min(var(--container), calc(100% - 36px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      background:rgba(7,10,22,.82);
      border-bottom:1px solid rgba(34,211,238,.18);
      backdrop-filter:blur(18px);
      box-shadow:0 10px 30px rgba(0,0,0,.22);
    }
    .navbar{padding:14px 0}
    .brand-mark{
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      font-weight:900;
      letter-spacing:.02em;
      white-space:nowrap;
    }
    .brand-icon{
      width:42px;
      height:42px;
      border-radius:15px;
      display:grid;
      place-items:center;
      background:
        linear-gradient(135deg,rgba(139,92,246,1),rgba(34,211,238,1));
      box-shadow:0 0 26px rgba(34,211,238,.35), inset 0 1px 0 rgba(255,255,255,.32);
      position:relative;
      overflow:hidden;
    }
    .brand-icon:after{
      content:"";
      position:absolute;
      inset:9px 11px;
      border-left:12px solid rgba(255,255,255,.96);
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      filter:drop-shadow(0 0 8px rgba(255,255,255,.55));
    }
    .navbar-toggler{
      border:1px solid rgba(34,211,238,.35);
      border-radius:14px;
      padding:9px 11px;
      color:#fff;
      box-shadow:none!important;
    }
    .navbar-toggler:focus{outline:3px solid rgba(34,211,238,.22)}
    .navbar-toggler-icon{
      background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28247,248,255,0.95%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    .nav-shell{
      display:flex;
      align-items:center;
      gap:18px;
    }
    .navbar-nav .nav-link{
      color:var(--muted);
      font-weight:700;
      padding:10px 16px!important;
      border-radius:999px;
      position:relative;
    }
    .navbar-nav .nav-link:before{
      content:"";
      position:absolute;
      left:16px;
      right:16px;
      bottom:5px;
      height:2px;
      transform:scaleX(0);
      transform-origin:left;
      background:linear-gradient(90deg,var(--primary-2),var(--primary));
      transition:var(--ease);
      border-radius:999px;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active{
      color:#fff;
      background:rgba(139,92,246,.13);
      text-shadow:0 0 14px rgba(34,211,238,.42);
    }
    .navbar-nav .nav-link:hover:before,
    .navbar-nav .nav-link.active:before{transform:scaleX(1)}
    .nav-search{
      display:flex;
      align-items:center;
      gap:8px;
      padding:7px 8px 7px 14px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(255,255,255,.05);
      border-radius:999px;
      min-width:240px;
    }
    .nav-search input{
      width:100%;
      color:#fff;
      background:transparent;
      border:0;
      outline:0;
      font-size:14px;
    }
    .nav-search input::placeholder{color:rgba(170,179,208,.7)}
    .nav-search button,
    .btn-neon{
      border:0;
      color:#06111b;
      font-weight:900;
      border-radius:999px;
      padding:10px 18px;
      background:linear-gradient(135deg,var(--primary-2),#a7f3d0);
      box-shadow:0 0 24px rgba(34,211,238,.28);
      transition:var(--ease);
      white-space:nowrap;
    }
    .nav-search button:hover,
    .btn-neon:hover{
      transform:translateY(-2px);
      box-shadow:0 16px 38px rgba(34,211,238,.26);
      color:#06111b;
    }
    .btn-ghost{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      border:1px solid rgba(148,163,184,.26);
      color:#fff;
      background:rgba(255,255,255,.06);
      border-radius:999px;
      padding:12px 20px;
      font-weight:800;
      transition:var(--ease);
    }
    .btn-ghost:hover{
      transform:translateY(-2px);
      border-color:rgba(34,211,238,.52);
      background:rgba(34,211,238,.10);
      color:#fff;
      box-shadow:0 14px 34px rgba(0,0,0,.20);
    }
    .btn-pink{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      border:0;
      color:#fff;
      background:linear-gradient(135deg,var(--primary-3),var(--primary));
      border-radius:999px;
      padding:12px 20px;
      font-weight:900;
      box-shadow:0 18px 38px rgba(255,61,129,.22);
      transition:var(--ease);
    }
    .btn-pink:hover{transform:translateY(-2px);color:#fff;box-shadow:0 24px 48px rgba(255,61,129,.28)}
    .hero{
      position:relative;
      padding:94px 0 64px;
      overflow:hidden;
      border-bottom:1px solid rgba(148,163,184,.14);
    }
    .hero:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(180deg,rgba(8,10,20,.2),rgba(8,10,20,.94)),
        radial-gradient(circle at center,rgba(139,92,246,.18),transparent 46%);
      pointer-events:none;
    }
    .hero-stage{
      position:relative;
      border:1px solid rgba(148,163,184,.22);
      background:
        linear-gradient(135deg,rgba(17,22,42,.78),rgba(15,23,42,.50)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 86px);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow);
      padding:44px;
      overflow:hidden;
    }
    .hero-stage:after{
      content:"";
      position:absolute;
      width:360px;
      height:360px;
      right:-120px;
      top:-130px;
      background:radial-gradient(circle,rgba(34,211,238,.26),transparent 68%);
      filter:blur(2px);
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:8px 13px;
      border-radius:999px;
      color:#dffbff;
      background:rgba(34,211,238,.10);
      border:1px solid rgba(34,211,238,.26);
      font-size:14px;
      font-weight:800;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
    }
    .pulse-dot{
      width:9px;
      height:9px;
      border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 6px rgba(56,217,150,.12),0 0 20px rgba(56,217,150,.62);
    }
    h1{
      margin:20px auto 0;
      max-width:980px;
      font-size:clamp(34px,6vw,68px);
      line-height:1.08;
      letter-spacing:-.05em;
      font-weight:950;
    }
    .text-gradient{
      background:linear-gradient(90deg,#fff 0%,#b9f7ff 46%,#c4b5fd 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-desc{
      max-width:860px;
      margin:22px auto 0;
      color:#d7def4;
      font-size:clamp(16px,2vw,19px);
    }
    .hero-search{
      max-width:820px;
      margin:34px auto 0;
      padding:10px;
      display:flex;
      gap:10px;
      align-items:center;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(148,163,184,.22);
      border-radius:999px;
      box-shadow:0 20px 55px rgba(0,0,0,.24);
    }
    .hero-search input{
      flex:1;
      min-width:0;
      color:#fff;
      border:0;
      outline:0;
      background:transparent;
      padding:13px 16px;
      font-size:16px;
    }
    .hero-search input::placeholder{color:rgba(215,222,244,.64)}
    .hero-search .btn-neon{padding:13px 28px}
    .quick-tags{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:12px;
      margin:23px auto 0;
      max-width:900px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border-radius:999px;
      padding:9px 13px;
      border:1px solid rgba(148,163,184,.20);
      background:rgba(255,255,255,.055);
      color:#d7def4;
      font-size:14px;
      font-weight:800;
      transition:var(--ease);
    }
    .tag:hover{
      border-color:rgba(34,211,238,.45);
      transform:translateY(-2px);
      color:#fff;
      box-shadow:0 12px 28px rgba(0,0,0,.20);
    }
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin:32px auto 0;
      max-width:840px;
    }
    .metric{
      padding:18px;
      border:1px solid rgba(148,163,184,.18);
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035));
      text-align:left;
    }
    .metric strong{
      display:block;
      font-size:24px;
      line-height:1.1;
      color:#fff;
    }
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:14px}
    main{position:relative}
    .section{
      padding:76px 0;
      position:relative;
    }
    .section-sm{padding:56px 0}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:28px;
      margin-bottom:30px;
    }
    .section-kicker{
      color:var(--primary-2);
      font-weight:900;
      letter-spacing:.08em;
      font-size:13px;
      margin-bottom:9px;
    }
    .section-title{
      margin:0;
      font-size:clamp(26px,4vw,42px);
      line-height:1.18;
      font-weight:950;
      letter-spacing:-.035em;
    }
    .section-desc{
      max-width:560px;
      margin:10px 0 0;
      color:var(--muted);
      font-size:16px;
    }
    .glass-card{
      border:1px solid rgba(148,163,184,.18);
      background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035));
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
      overflow:hidden;
    }
    .glass-card:hover{
      transform:translateY(-4px);
      border-color:rgba(34,211,238,.34);
      box-shadow:0 26px 60px rgba(0,0,0,.30);
    }
    .progress-wrap{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:22px;
      align-items:stretch;
    }
    .progress-panel{padding:28px}
    .progress-item{margin-bottom:22px}
    .progress-item:last-child{margin-bottom:0}
    .progress-label{
      display:flex;
      justify-content:space-between;
      gap:12px;
      color:#eef4ff;
      font-weight:850;
      margin-bottom:10px;
    }
    .progress-label small{color:var(--muted);font-weight:700}
    .progress{
      height:12px;
      border-radius:999px;
      background:rgba(148,163,184,.15);
      overflow:visible;
    }
    .progress-bar{
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary-2),var(--primary));
      box-shadow:0 0 18px rgba(34,211,238,.40);
    }
    .notice-panel{
      padding:28px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      background:
        linear-gradient(135deg,rgba(139,92,246,.20),rgba(34,211,238,.08)),
        rgba(255,255,255,.035);
    }
    .notice-panel p{color:#d7def4;margin:12px 0 0}
    .status-list{display:grid;gap:12px;margin-top:24px}
    .status-line{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:14px 16px;
      border-radius:16px;
      background:rgba(7,10,22,.35);
      border:1px solid rgba(148,163,184,.15);
    }
    .status-line span{color:var(--muted)}
    .badge-soft{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:999px;
      padding:6px 10px;
      color:#eaffff;
      background:rgba(34,211,238,.12);
      border:1px solid rgba(34,211,238,.26);
      font-size:13px;
      font-weight:850;
      white-space:nowrap;
    }
    .tier-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:20px;
      align-items:stretch;
    }
    .tier-card{
      padding:26px;
      position:relative;
      min-height:100%;
    }
    .tier-card.featured{
      border-color:rgba(255,61,129,.42);
      background:
        radial-gradient(circle at 50% 0,rgba(255,61,129,.18),transparent 42%),
        linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.04));
    }
    .tier-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:18px;
    }
    .tier-name{font-size:22px;font-weight:950}
    .tier-price{
      display:flex;
      align-items:flex-end;
      gap:6px;
      margin:12px 0 14px;
    }
    .tier-price strong{font-size:34px;line-height:1;font-weight:950}
    .tier-price span{color:var(--muted)}
    .tier-card p{color:var(--muted);margin:0 0 18px}
    .check-list{
      list-style:none;
      padding:0;
      margin:0 0 22px;
      display:grid;
      gap:12px;
    }
    .check-list li{
      position:relative;
      padding-left:28px;
      color:#dce4fb;
    }
    .check-list li:before{
      content:"✓";
      position:absolute;
      left:0;
      top:0;
      width:20px;
      height:20px;
      border-radius:50%;
      display:grid;
      place-items:center;
      color:#06111b;
      background:var(--success);
      font-size:12px;
      font-weight:950;
      line-height:20px;
    }
    .wall-strip{
      display:grid;
      grid-template-columns:1fr 1.2fr;
      gap:22px;
    }
    .quote-large{
      padding:30px;
      background:
        linear-gradient(135deg,rgba(34,211,238,.14),rgba(139,92,246,.10)),
        rgba(255,255,255,.035);
    }
    .quote-mark{
      font-size:54px;
      line-height:1;
      color:var(--primary-2);
      filter:drop-shadow(0 0 18px rgba(34,211,238,.35));
    }
    .quote-large p{
      margin:10px 0 18px;
      color:#eef4ff;
      font-size:20px;
      line-height:1.75;
    }
    .supporter-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:14px;
    }
    .supporter{
      padding:18px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(255,255,255,.055);
      border-radius:18px;
      transition:var(--ease);
    }
    .supporter:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.35)}
    .supporter strong{display:block;color:#fff;margin-bottom:4px}
    .supporter span{color:var(--muted);font-size:14px}
    .news-layout{
      display:grid;
      grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);
      gap:24px;
      align-items:start;
    }
    .news-list{
      border:1px solid rgba(148,163,184,.18);
      border-radius:var(--radius-lg);
      overflow:hidden;
      background:rgba(255,255,255,.045);
      box-shadow:var(--shadow-soft);
    }
    .news-item{
      display:grid;
      grid-template-columns:120px 1fr auto;
      gap:18px;
      align-items:center;
      padding:20px 22px;
      border-bottom:1px solid rgba(148,163,184,.14);
      transition:var(--ease);
    }
    .news-item:last-child{border-bottom:0}
    .news-item:hover{
      background:rgba(34,211,238,.07);
      color:#fff;
    }
    .news-date{
      color:var(--primary-2);
      font-weight:900;
      font-size:14px;
    }
    .news-title{
      color:#f6f8ff;
      font-weight:900;
      line-height:1.45;
    }
    .news-summary{
      display:block;
      color:var(--muted);
      font-weight:500;
      margin-top:4px;
      font-size:14px;
    }
    .arrow{
      width:34px;
      height:34px;
      border-radius:50%;
      display:grid;
      place-items:center;
      border:1px solid rgba(148,163,184,.22);
      color:#fff;
    }
    .news-item:hover .arrow{border-color:rgba(34,211,238,.45);background:rgba(34,211,238,.12)}
    .recommend-box{padding:24px;position:sticky;top:96px}
    .recommend-box h3{font-size:22px;font-weight:950;margin:0 0 12px}
    .recommend-box p{color:var(--muted);margin-bottom:18px}
    .mini-topic{
      display:flex;
      justify-content:space-between;
      gap:14px;
      padding:14px 0;
      border-top:1px solid rgba(148,163,184,.14);
    }
    .mini-topic strong{color:#fff}
    .mini-topic span{color:var(--muted);font-size:13px}
    .cta-band{
      padding:34px;
      border-radius:var(--radius-xl);
      background:
        radial-gradient(circle at 18% 10%,rgba(255,61,129,.22),transparent 34%),
        radial-gradient(circle at 86% 20%,rgba(34,211,238,.22),transparent 36%),
        linear-gradient(135deg,rgba(139,92,246,.34),rgba(15,23,42,.88));
      border:1px solid rgba(255,255,255,.16);
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:26px;
      align-items:center;
    }
    .cta-band h2{font-size:clamp(26px,4vw,42px);line-height:1.18;font-weight:950;margin:0}
    .cta-band p{color:#dce4fb;margin:14px 0 0}
    .cta-actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap}
    .guarantee-row{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
    }
    .guarantee{
      padding:22px;
      min-height:170px;
    }
    .icon-bubble{
      width:48px;
      height:48px;
      display:grid;
      place-items:center;
      border-radius:17px;
      margin-bottom:15px;
      background:rgba(34,211,238,.12);
      border:1px solid rgba(34,211,238,.24);
      color:#bff8ff;
      font-weight:950;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
    }
    .guarantee h3,
    .topic-card h3{font-size:19px;font-weight:950;margin:0 0 8px}
    .guarantee p,
    .topic-card p{color:var(--muted);margin:0}
    .topic-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      grid-auto-rows:minmax(190px,auto);
      gap:18px;
    }
    .topic-card{
      padding:24px;
      position:relative;
    }
    .topic-card.large{grid-row:span 2;background:linear-gradient(150deg,rgba(34,211,238,.16),rgba(139,92,246,.08))}
    .topic-card .tag{margin-bottom:18px}
    .topic-card ul{
      margin:18px 0 0;
      padding-left:20px;
      color:#dce4fb;
    }
    .topic-card li{margin:7px 0}
    .faq-wrap{
      display:grid;
      grid-template-columns:.72fr 1.28fr;
      gap:26px;
      align-items:start;
    }
    .faq-side{
      padding:28px;
      background:linear-gradient(180deg,rgba(139,92,246,.16),rgba(255,255,255,.04));
    }
    .faq-side p{color:var(--muted);margin:12px 0 0}
    .accordion{
      --bs-accordion-bg:transparent;
      --bs-accordion-border-color:rgba(148,163,184,.18);
      --bs-accordion-color:#fff;
      --bs-accordion-btn-color:#fff;
      --bs-accordion-active-color:#fff;
      --bs-accordion-active-bg:rgba(34,211,238,.08);
      --bs-accordion-btn-focus-box-shadow:0 0 0 .25rem rgba(34,211,238,.16);
    }
    .accordion-item{
      border-radius:18px!important;
      overflow:hidden;
      margin-bottom:12px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(148,163,184,.18)!important;
    }
    .accordion-button{
      font-weight:900;
      padding:18px 20px;
      box-shadow:none!important;
    }
    .accordion-button:not(.collapsed){background:rgba(34,211,238,.08)}
    .accordion-button::after{
      filter:invert(1) grayscale(1);
      opacity:.8;
    }
    .accordion-body{
      color:var(--muted);
      padding:0 20px 20px;
    }
    .site-footer{
      padding:48px 0 26px;
      border-top:1px solid rgba(148,163,184,.16);
      background:linear-gradient(180deg,rgba(7,10,22,.40),rgba(3,6,16,.92));
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1fr auto;
      gap:28px;
      align-items:start;
    }
    .footer-brand{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:950}
    .footer-text{max-width:720px;color:var(--muted);margin:14px 0 0}
    .footer-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{
      color:var(--muted);
      border:1px solid rgba(148,163,184,.16);
      background:rgba(255,255,255,.035);
      border-radius:999px;
      padding:8px 12px;
      font-weight:750;
    }
    .footer-links a:hover{color:#fff;border-color:rgba(34,211,238,.38);background:rgba(34,211,238,.08)}
    .copyright{
      margin-top:30px;
      padding-top:20px;
      border-top:1px solid rgba(148,163,184,.14);
      color:var(--muted-2);
      font-size:14px;
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .form-hint{
      color:rgba(215,222,244,.78);
      font-size:13px;
      margin-top:10px;
    }
    .focus-ring:focus,
    .btn-neon:focus,
    .btn-ghost:focus,
    .btn-pink:focus{
      outline:3px solid rgba(34,211,238,.24);
      outline-offset:3px;
    }
    @media (max-width:1024px){
      .nav-search{min-width:190px}
      .hero-stage{padding:34px}
      .progress-wrap,
      .wall-strip,
      .cta-band,
      .faq-wrap{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
      .guarantee-row{grid-template-columns:repeat(2,1fr)}
      .topic-grid{grid-template-columns:1fr 1fr}
      .topic-card.large{grid-row:auto;grid-column:span 2}
      .news-layout{grid-template-columns:1fr}
      .recommend-box{position:relative;top:auto}
    }
    @media (max-width:768px){
      .navbar-collapse{
        margin-top:14px;
        padding:14px;
        border-radius:22px;
        border:1px solid rgba(148,163,184,.18);
        background:rgba(10,14,28,.96);
      }
      .nav-shell{align-items:stretch;flex-direction:column;width:100%}
      .nav-search{width:100%;min-width:0}
      .navbar-nav .nav-link{padding:11px 14px!important}
      .hero{padding:58px 0 42px}
      .hero-stage{padding:26px 18px;border-radius:24px}
      .hero-search{border-radius:24px;flex-direction:column;align-items:stretch}
      .hero-search .btn-neon{width:100%}
      .hero-metrics{grid-template-columns:1fr}
      .section{padding:56px 0}
      .section-head{display:block}
      .tier-grid{grid-template-columns:1fr}
      .supporter-grid{grid-template-columns:1fr}
      .news-item{grid-template-columns:1fr;gap:10px}
      .news-date{font-size:13px}
      .arrow{display:none}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .container-custom{width:min(100% - 24px,var(--container))}
      h1{font-size:34px;letter-spacing:-.035em}
      .section-title{font-size:27px}
      .quick-tags{justify-content:flex-start}
      .tag{font-size:13px}
      .metric{padding:16px}
      .progress-panel,
      .notice-panel,
      .quote-large,
      .recommend-box,
      .cta-band,
      .faq-side{padding:22px}
      .guarantee-row,
      .topic-grid{grid-template-columns:1fr}
      .topic-card.large{grid-column:auto}
      .cta-actions .btn-neon,
      .cta-actions .btn-ghost,
      .cta-actions .btn-pink{width:100%}
    }

/* 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}