*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  :root{
    --blue-900:#0a1628;--blue-800:#0d2240;--blue-700:#0f3460;--blue-600:#165a9c;
    --blue-500:#1a73e8;--blue-400:#4a90e2;--blue-300:#7ab8f5;--blue-200:#a8d4ff;
    --blue-100:#d6eaff;--blue-50:#eef5fc;--accent:#00c9db;--gold:#f0a500;
    --white:#ffffff;--gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;
    --gray-300:#cbd5e1;--gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;
    --gray-700:#334155;--gray-800:#1e293b;--gray-900:#0f172a;
    --red:#e74c3c;--green:#27ae60;--orange:#f39c12;--purple:#8e44ad;
    --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;
    --shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 16px rgba(0,0,0,.1);
    --shadow-lg:0 8px 32px rgba(0,0,0,.12);--shadow-xl:0 16px 48px rgba(13,34,64,.15);
    --transition:all .3s cubic-bezier(.4,0,.2,1);--max-width:1200px;
  }
  html{scroll-behavior:smooth;font-size:16px}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    color:var(--gray-800);background:var(--gray-50);line-height:1.7;
    overflow-x:hidden;-webkit-font-smoothing:antialiased;
  }
  a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;height:auto;display:block}
  .container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

  /* ========== Hero Banner ========== */
  .hero{
    background:linear-gradient(160deg,var(--blue-900),var(--blue-700));
    padding:70px 20px 72px;position:relative;overflow:hidden;text-align:center;
  }
  .hero::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at 30% 50%,rgba(0,201,219,.12),transparent 60%),
               radial-gradient(ellipse at 70% 30%,rgba(26,115,232,.1),transparent 60%);
  }
  .hero .container{position:relative;z-index:1}
  .hero .breadcrumb{
    display:flex;align-items:center;justify-content:center;gap:8px;
    font-size:.85rem;color:rgba(255,255,255,.5);margin-bottom:20px;
  }
  .hero .breadcrumb a{color:rgba(255,255,255,.7);transition:var(--transition)}
  .hero .breadcrumb a:hover{color:var(--accent)}
  .hero h1{font-size:clamp(2rem,5vw,3rem);font-weight:800;color:var(--white);margin-bottom:16px;letter-spacing:-.5px}
  .hero .hero-sub{color:rgba(255,255,255,.7);font-size:1.1rem;max-width:840px;margin:0 auto 36px}
  .hero-stats{
    display:flex;justify-content:center;gap:48px;flex-wrap:wrap;
    padding-top:36px;border-top:1px solid rgba(255,255,255,.1);
  }
  .hero-stat{text-align:center}
  .hero-stat .num{font-size:2.2rem;font-weight:800;color:var(--accent)}
  .hero-stat .label{font-size:.85rem;color:rgba(255,255,255,.6);margin-top:4px}

  /* ========== Filter Bar ========== */
  .filter-bar{
    background:var(--white);border-bottom:1px solid var(--gray-200);
    position:sticky;top:68px;z-index:100;box-shadow:var(--shadow-sm);
  }
  .filter-inner{
    max-width:var(--max-width);margin:0 auto;padding:16px 20px;
    display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  }
  .filter-chips{display:flex;gap:10px;flex-wrap:wrap}
  .filter-chip{
    padding:8px 20px;border-radius:50px;font-size:.88rem;font-weight:600;
    background:var(--gray-100);color:var(--gray-600);border:1px solid transparent;
    cursor:pointer;transition:var(--transition);white-space:nowrap;
  }
  .filter-chip:hover{background:var(--blue-50);color:var(--blue-600)}
  .filter-chip.active{
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    color:var(--white);box-shadow:0 4px 14px rgba(0,201,219,.3);
  }
  .filter-chip .count{
    display:inline-block;margin-left:6px;font-size:.75rem;opacity:.7;
  }
  .filter-search{
    display:flex;align-items:center;gap:8px;
    background:var(--gray-100);border-radius:50px;padding:8px 18px;
    border:1px solid var(--gray-200);transition:var(--transition);
  }
  .filter-search:focus-within{border-color:var(--blue-400);box-shadow:0 0 0 3px rgba(26,115,232,.1)}
  .filter-search input{
    border:none;background:none;outline:none;font-size:.88rem;
    color:var(--gray-700);width:180px;
  }
  .filter-search input::placeholder{color:var(--gray-400)}
  .filter-search .search-icon{font-size:1rem;color:var(--gray-400)}

  /* ========== Featured Activity ========== */
  .featured-activity{padding:56px 0 32px}
  .featured-card{
    display:grid;grid-template-columns:1fr 1fr;gap:0;
    border-radius:var(--radius-xl);overflow:hidden;
    box-shadow:var(--shadow-xl);background:var(--white);
  }
  .featured-img{
    position:relative;min-height:360px;overflow:hidden;
    background:linear-gradient(135deg,var(--blue-700),var(--blue-500));
  }
  .featured-img img{
    width:100%;height:100%;object-fit:cover;
    transition:transform .6s ease;
  }
  .featured-card:hover .featured-img img{transform:scale(1.05)}
  .featured-img .featured-status{
    position:absolute;top:20px;left:20px;
    background:var(--red);color:var(--white);
    padding:6px 16px;border-radius:50px;font-size:.8rem;font-weight:700;
    display:flex;align-items:center;gap:6px;
    box-shadow:0 4px 14px rgba(231,76,60,.4);
  }
  .featured-img .featured-status .pulse-dot{
    width:8px;height:8px;background:var(--white);border-radius:50%;
    animation:livePulse 1.5s infinite;
  }
  @keyframes livePulse{0%,100%{opacity:1}50%{opacity:.3}}
  .featured-img .featured-countdown{
    position:absolute;bottom:20px;left:20px;right:20px;
    background:rgba(10,22,40,.8);backdrop-filter:blur(10px);
    border-radius:var(--radius-md);padding:14px 20px;
    display:flex;align-items:center;justify-content:center;gap:16px;
    color:var(--white);
  }
  .featured-img .featured-countdown .cd-label{
    font-size:.78rem;color:rgba(255,255,255,.6);white-space:nowrap;
  }
  .featured-img .featured-countdown .cd-box{
    text-align:center;
  }
  .featured-img .featured-countdown .cd-num{
    font-size:1.6rem;font-weight:800;color:var(--accent);line-height:1;
  }
  .featured-img .featured-countdown .cd-unit{
    font-size:.68rem;color:rgba(255,255,255,.5);margin-top:2px;
  }
  .featured-content{padding:40px 36px;display:flex;flex-direction:column;justify-content:center}
  .featured-content .featured-tag{
    display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
    padding:5px 14px;border-radius:20px;font-size:.78rem;font-weight:700;
    background:#e3f2fd;color:#1565c0;margin-bottom:16px;
  }
  .featured-content h2{
    font-size:1.6rem;font-weight:800;color:var(--gray-900);
    line-height:1.4;margin-bottom:14px;
  }
  .featured-content .featured-desc{
    color:var(--gray-500);font-size:.95rem;line-height:1.8;margin-bottom:24px;
  }
  .featured-info{
    display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:28px;
  }
  .featured-info-item{
    display:flex;align-items:flex-start;gap:10px;font-size:.88rem;
  }
  .featured-info-item .fi-icon{
    width:36px;height:36px;border-radius:10px;flex-shrink:0;
    background:var(--blue-50);display:flex;align-items:center;justify-content:center;
    font-size:1rem;
  }
  .featured-info-item .fi-text{display:flex;flex-direction:column}
  .featured-info-item .fi-label{font-size:.72rem;color:var(--gray-400)}
  .featured-info-item .fi-value{font-size:.88rem;color:var(--gray-700);font-weight:600}
  .featured-actions{display:flex;gap:12px;flex-wrap:wrap}
  .btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:12px 28px;border-radius:10px;font-size:.92rem;font-weight:600;
    cursor:pointer;transition:var(--transition);border:none;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    color:var(--white);box-shadow:0 6px 20px rgba(26,115,232,.3);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(26,115,232,.4)}
  .btn-outline{
    background:transparent;color:var(--gray-700);
    border:1px solid var(--gray-300);
  }
  .btn-outline:hover{border-color:var(--blue-400);color:var(--blue-500);background:var(--blue-50)}

  /* ========== Activity Grid ========== */
  .activity-section{padding:32px 0 64px}
  .section-header{text-align:center;margin-bottom:40px}
  .section-header .eyebrow{
    display:inline-block;padding:4px 14px;border-radius:20px;
    background:var(--blue-50);color:var(--blue-500);font-size:.82rem;font-weight:600;
    margin-bottom:14px;
  }
  .section-header h2{font-size:clamp(1.6rem,3.5vw,2rem);font-weight:800;color:var(--gray-900);margin-bottom:10px}
  .section-header p{color:var(--gray-500);font-size:.95rem}

  .activity-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
  }
  .act-card{
    background:var(--white);border-radius:var(--radius-lg);overflow:hidden;
    border:1px solid var(--gray-200);transition:var(--transition);
    display:flex;flex-direction:column;
  }
  .act-card:hover{
    box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:var(--blue-200);
  }
  .act-card.hidden{display:none}
  .act-card-img{
    position:relative;width:100%;aspect-ratio:16/10;overflow:hidden;
    background:linear-gradient(135deg,var(--blue-100),var(--blue-200));
  }
  .act-card-img img{
    width:100%;height:100%;object-fit:cover;transition:transform .5s ease;
  }
  .act-card:hover .act-card-img img{transform:scale(1.08)}
  .act-card-img .act-status{
    position:absolute;top:14px;right:14px;
    padding:4px 12px;border-radius:20px;font-size:.72rem;font-weight:700;
    backdrop-filter:blur(8px);
  }
  .act-status.upcoming{background:rgba(39,174,96,.9);color:var(--white)}
  .act-status.ongoing{background:rgba(231,76,60,.9);color:var(--white)}
  .act-status.ended{background:rgba(100,116,139,.85);color:var(--white)}
  .act-card-img .act-date-badge{
    position:absolute;bottom:14px;left:14px;
    background:rgba(255,255,255,.95);border-radius:var(--radius-md);
    padding:8px 14px;display:flex;flex-direction:column;align-items:center;
    box-shadow:var(--shadow-md);min-width:56px;
  }
  .act-date-badge .day{font-size:1.4rem;font-weight:800;color:var(--gray-900);line-height:1}
  .act-date-badge .month{font-size:.68rem;color:var(--gray-500);margin-top:2px}
  .act-card-body{padding:22px 24px;flex:1;display:flex;flex-direction:column}
  .act-card-body .act-tag{
    display:inline-block;align-self:flex-start;
    padding:3px 12px;border-radius:20px;font-size:.72rem;font-weight:600;
    margin-bottom:12px;
  }
  .tag-roadshow{background:#e3f2fd;color:#1565c0}
  .tag-training{background:#e8f5e9;color:#2e7d32}
  .tag-meetup{background:#fff3e0;color:#e65100}
  .tag-competition{background:#f3e5f5;color:#6a1b9a}
  .tag-online{background:#e0f7fa;color:#00838f}
  .act-card-body h3{
    font-size:1.05rem;font-weight:700;color:var(--gray-900);
    line-height:1.5;margin-bottom:10px;
  }
  .act-card-body .act-desc{
    font-size:.86rem;color:var(--gray-500);line-height:1.7;margin-bottom:16px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .act-card-meta{
    display:flex;flex-direction:column;gap:8px;margin-bottom:16px;
    padding-top:16px;border-top:1px solid var(--gray-100);
  }
  .act-card-meta .meta-row{
    display:flex;align-items:center;gap:8px;font-size:.82rem;color:var(--gray-500);
  }
  .act-card-meta .meta-row .meta-icon{font-size:.9rem;flex-shrink:0}
  .act-card-footer{
    display:flex;align-items:center;justify-content:space-between;
    margin-top:auto;
  }
  .act-card-footer .act-price{
    font-size:.95rem;font-weight:700;color:var(--blue-600);
  }
  .act-card-footer .act-price.free{color:var(--green)}
  .act-card-footer .act-link{
    font-size:.85rem;font-weight:600;color:var(--blue-500);
    display:flex;align-items:center;gap:4px;transition:var(--transition);
  }
  .act-card-footer .act-link:hover{gap:8px;color:var(--blue-600)}
  .act-card-footer .act-link.ended-link{color:var(--gray-400);cursor:default}
  .act-card-footer .act-link.ended-link:hover{gap:4px}

  /* ========== Pagination ========== */
  .pagination{
    display:flex;justify-content:center;align-items:center;gap:8px;
    margin-top:48px;
  }
  .page-btn{
    width:40px;height:40px;border-radius:var(--radius-sm);
    display:flex;align-items:center;justify-content:center;
    font-size:.9rem;font-weight:600;color:var(--gray-600);
    background:var(--white);border:1px solid var(--gray-200);
    cursor:pointer;transition:var(--transition);
  }
  .page-btn:hover:not(:disabled){border-color:var(--blue-400);color:var(--blue-500)}
  .page-btn.active{
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    color:var(--white);border-color:transparent;
    box-shadow:0 4px 14px rgba(0,201,219,.3);
  }
  .page-btn:disabled{opacity:.4;cursor:not-allowed}
  .page-ellipsis{
    width:40px;display:flex;align-items:center;justify-content:center;
    color:var(--gray-400);font-size:.9rem;
  }

  /* ========== CTA Section ========== */
  .cta-section{padding:64px 0}
  .cta-box{
    background:linear-gradient(135deg,var(--blue-700),var(--blue-900));
    border-radius:var(--radius-xl);padding:56px 40px;text-align:center;
    position:relative;overflow:hidden;
  }
  .cta-box::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at top right,rgba(0,201,219,.15),transparent 60%);
  }
  .cta-box .cta-icon{
    font-size:2.4rem;margin-bottom:16px;position:relative;z-index:1;
  }
  .cta-box h2{
    font-size:1.8rem;font-weight:800;color:var(--white);
    margin-bottom:14px;position:relative;z-index:1;
  }
  .cta-box p{
    color:rgba(255,255,255,.7);font-size:1rem;max-width:520px;
    margin:0 auto 28px;position:relative;z-index:1;
  }
  .cta-box .btn{
    position:relative;z-index:1;
    background:var(--white);color:var(--blue-600);
  }
  .cta-box .btn:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(0,0,0,.2)}

  /* ========== No Results ========== */
  .no-results{
    display:none;text-align:center;padding:80px 20px;
  }
  .no-results.show{display:block}
  .no-results .nr-icon{font-size:3.5rem;margin-bottom:16px;opacity:.4}
  .no-results h3{font-size:1.2rem;font-weight:700;color:var(--gray-700);margin-bottom:8px}
  .no-results p{color:var(--gray-400);font-size:.9rem}

  /* ========== Animations ========== */
  @keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

  /* ========== Responsive ========== */
  @media (max-width:1024px){
    .featured-card{grid-template-columns:1fr}
    .featured-img{min-height:280px}
    .activity-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr}
    .filter-search input{width:140px}
  }
  @media (max-width:768px){
    .nav-links{
      position:fixed;top:68px;left:0;right:0;bottom:0;
      background:rgba(255,255,255,.98);flex-direction:column;
      align-items:stretch;padding:20px;gap:4px;
      transform:translateX(100%);transition:transform .35s ease;
      backdrop-filter:blur(16px);
    }
    .nav-links.open{transform:translateX(0)}
    .nav-links a{padding:14px 20px;font-size:1rem;border-radius:var(--radius-md)}
    .nav-toggle{display:flex}
    .hero{padding:120px 16px 56px}
    .hero-stats{gap:24px}
    .hero-stat .num{font-size:1.6rem}
    .filter-inner{flex-direction:column;align-items:stretch}
    .filter-search{width:100%}
    .filter-search input{width:100%;flex:1}
    .featured-content{padding:28px 24px}
    .featured-content h2{font-size:1.3rem}
    .featured-info{grid-template-columns:1fr}
    .activity-grid{grid-template-columns:1fr}
    section{padding:48px 0}
    .footer-grid{grid-template-columns:1fr;gap:32px}
    .cta-box{padding:40px 24px}
    .cta-box h2{font-size:1.4rem}
    .pagination{gap:6px}
    .page-btn{width:36px;height:36px}
  }