@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
  *{margin:0;padding:0;box-sizing:border-box}
  :root{
    --c-primary:#1E40AF;
    --c-primary-light:#3B82F6;
    --c-accent:#F59E0B;
    --c-bg:#F8FAFF;
    --c-white:#FFFFFF;
    --c-text:#1F2937;
    --c-muted:#6B7280;
    --c-border:#E5E7EB;
    --c-success:#10B981;
    --c-danger:#EF4444;
    --c-purple:#8B5CF6;
    --shadow-sm:0 1px 3px rgba(0,0,0,.08);
    --shadow-md:0 4px 16px rgba(0,0,0,.10);
    --shadow-lg:0 12px 40px rgba(0,0,0,.14);
    --radius:16px;
    --radius-sm:10px;
    --max-w:1200px;
  }
  html{scroll-behavior:smooth;font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;color:var(--c-text);background:var(--c-bg)}
  body{min-height:100vh}

  /* === NAV === */
  .navbar{
    position:sticky;top:0;z-index:200;
    background:rgba(255,255,255,0.92);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(0,0,0,.06);
    transition:box-shadow .3s;
  }
  .navbar.scrolled{box-shadow:var(--shadow-md)}
  .nav-inner{
    max-width:var(--max-w);margin:0 auto;
    padding:0 24px;
    height:64px;
    display:flex;align-items:center;gap:32px;
  }
  .nav-logo{
    display:flex;align-items:center;gap:10px;
    text-decoration:none;color:var(--c-text);font-weight:700;font-size:18px;flex-shrink:0;
  }
  .nav-logo svg{width:32px;height:32px}
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-link{
    text-decoration:none;color:var(--c-muted);font-size:14px;font-weight:500;
    padding:6px 14px;border-radius:var(--radius-sm);
    transition:color .2s,background .2s;
  }
  .nav-link:hover,.nav-link.active{color:var(--c-primary);background:rgba(30,64,175,.06)}
  .nav-link.active{color:var(--c-primary);font-weight:600}
  .nav-cta{
    margin-left:16px;
    background:var(--c-primary);color:#fff;text-decoration:none;
    font-size:14px;font-weight:600;padding:8px 20px;border-radius:var(--radius-sm);
    transition:background .2s,transform .15s;
    flex-shrink:0;
  }
  .nav-cta:hover{background:var(--c-primary-light);transform:translateY(-1px)}
  .hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;border:none;background:none;padding:4px;margin-left:auto}
  .hamburger span{display:block;width:24px;height:2px;background:var(--c-text);border-radius:2px;transition:all .3s}

  /* mobile overlay */
  .nav-overlay{
    display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:150;opacity:0;transition:opacity .3s;
  }
  .nav-overlay.open{display:block;opacity:1}
  .mobile-menu{
    position:fixed;top:0;right:-300px;width:300px;height:100vh;
    background:#fff;z-index:160;
    transition:right .35s cubic-bezier(0.4,0,0.2,1);
    padding:24px;overflow-y:auto;
    box-shadow:var(--shadow-lg);
  }
  .mobile-menu.open{right:0}
  .mobile-menu-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}
  .mobile-menu-header h3{font-size:18px;color:var(--c-text)}
  .mobile-close{border:none;background:none;cursor:pointer;padding:4px;font-size:24px;color:var(--c-muted)}
  .mobile-nav{display:flex;flex-direction:column;gap:4px}
  .mobile-nav a{
    text-decoration:none;color:var(--c-text);font-size:15px;font-weight:500;
    padding:12px 16px;border-radius:var(--radius-sm);
    transition:background .2s;
  }
  .mobile-nav a:hover,.mobile-nav a.active{background:rgba(30,64,175,.06);color:var(--c-primary)}
  .mobile-sub{
    display:flex;flex-direction:column;gap:2px;padding-left:16px;
    max-height:0;overflow:hidden;transition:max-height .3s;
  }
  .mobile-sub.open{max-height:300px}
  .mobile-sub a{font-size:14px;color:var(--c-muted)}
  .mobile-actions{margin-top:24px;display:flex;flex-direction:column;gap:8px}
  .mobile-actions a{
    text-align:center;text-decoration:none;font-size:14px;font-weight:600;
    padding:12px;border-radius:var(--radius-sm);display:block;
  }
  .mobile-actions .btn-ghost{border:1px solid var(--c-border);color:var(--c-text)}
  .mobile-actions .btn-primary{background:var(--c-primary);color:#fff}

  /* === HERO === */
  .hero{
    background:linear-gradient(135deg,#1E40AF 0%,#312E81 60%,#1E3A8A 100%);
    padding:72px 24px 80px;
    position:relative;overflow:hidden;
  }
  .hero::before{
    content:'';position:absolute;inset:0;
    background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  }
  .hero-inner{max-width:var(--max-w);margin:0 auto;text-align:center;position:relative;z-index:1}
  .hero-badge{
    display:inline-block;
    background:rgba(245,158,11,.15);color:#FCD34D;
    font-size:13px;font-weight:600;padding:6px 16px;border-radius:99px;
    border:1px solid rgba(245,158,11,.3);
    margin-bottom:24px;
  }
  .hero h1{
    font-size:clamp(28px,5vw,52px);font-weight:800;color:#fff;line-height:1.15;
    margin-bottom:20px;letter-spacing:-.02em;
  }
  .hero h1 em{font-style:normal;color:#60A5FA}
  .hero-sub{
    font-size:17px;color:rgba(255,255,255,.72);max-width:680px;
    margin:0 auto 40px;line-height:1.7;
  }
  .hero-stats{
    display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
    max-width:800px;margin:0 auto;
  }
  .stat-item{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:20px 16px;text-align:center;backdrop-filter:blur(8px)}
  .stat-num{font-size:30px;font-weight:800;color:#fff;display:block}
  .stat-label{font-size:12px;color:rgba(255,255,255,.6);margin-top:4px;display:block}

  /* === SECTION COMMON === */
  .section{padding:72px 24px;max-width:var(--max-w);margin:0 auto}
  .section-alt{background:var(--c-white);border-radius:var(--radius) var(--radius) 0 0;margin-top:-24px;position:relative;z-index:2}
  .section-header{text-align:center;margin-bottom:48px}
  .section-tag{
    display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
    color:var(--c-primary);background:rgba(30,64,175,.08);
    padding:4px 14px;border-radius:99px;margin-bottom:12px;
  }
  .section h2{font-size:clamp(24px,3vw,36px);font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
  .section p{color:var(--c-muted);font-size:16px;max-width:560px;margin:0 auto;line-height:1.6}

  /* === FILTER BAR === */
  .filter-bar{
    display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:40px;
  }
  .filter-btn{
    border:1px solid var(--c-border);background:var(--c-white);
    font-size:13px;font-weight:500;color:var(--c-muted);
    padding:7px 18px;border-radius:99px;cursor:pointer;
    transition:all .2s;
  }
  .filter-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
  .filter-btn.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

  /* === SERVICE GRID === */
  .services-grid{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;
  }
  .service-card{
    background:var(--c-white);border:1px solid var(--c-border);
    border-radius:var(--radius);padding:24px;
    transition:box-shadow .25s,transform .25s;
    cursor:pointer;
  }
  .service-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
  .service-card[data-hidden]{display:none}
  .sc-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
  .sc-title{font-size:15px;font-weight:700;margin-bottom:6px}
  .sc-desc{font-size:13px;color:var(--c-muted);line-height:1.6}
  .sc-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
  .sc-tag{font-size:11px;font-weight:600;padding:3px 10px;border-radius:99px}
  .sc-tag.monthly{background:#EFF6FF;color:#2563EB}
  .sc-tag.quarterly{background:#FFF7ED;color:#D97706}
  .sc-tag.annual{background:#F0FDF4;color:#16A34A}
  .sc-tag.ongoing{background:#F5F3FF;color:#7C3AED}

  /* === CASE CARDS === */
  .cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
  .case-card{
    background:var(--c-white);border:1px solid var(--c-border);
    border-radius:var(--radius);overflow:hidden;
    transition:box-shadow .25s,transform .25s;
  }
  .case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
  .case-card[data-hidden]{display:none}
  .case-header{
    padding:24px 24px 16px;
    border-bottom:1px solid var(--c-border);
  }
  .case-industry{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;font-weight:700;color:var(--c-primary);
    background:rgba(30,64,175,.08);
    padding:4px 12px;border-radius:99px;margin-bottom:12px;
  }
  .case-name{font-size:18px;font-weight:800;margin-bottom:4px}
  .case-sub{font-size:13px;color:var(--c-muted)}
  .case-body{padding:20px 24px}
  .case-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}
  .metric{
    text-align:center;
    background:var(--c-bg);
    border-radius:var(--radius-sm);
    padding:12px 8px;
  }
  .metric-val{font-size:18px;font-weight:800;color:var(--c-primary);display:block}
  .metric-key{font-size:11px;color:var(--c-muted);margin-top:2px;display:block}
  .case-problem{
    font-size:13px;color:var(--c-muted);line-height:1.6;
    background:var(--c-bg);padding:12px 14px;border-radius:var(--radius-sm);
    border-left:3px solid #FCD34D;margin-bottom:16px;
  }
  .case-problem strong{color:var(--c-text)}
  .case-services{margin-bottom:20px}
  .case-services-title{font-size:12px;font-weight:700;color:var(--c-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
  .case-services-list{display:flex;flex-wrap:wrap;gap:6px}
  .cs-item{
    font-size:12px;font-weight:500;
    background:var(--c-bg);color:var(--c-text);
    padding:4px 10px;border-radius:99px;border:1px solid var(--c-border);
  }
  .case-footer{padding:16px 24px;border-top:1px solid var(--c-border);display:flex;align-items:center;justify-content:space-between}
  .case-period{font-size:12px;color:var(--c-muted)}
  .case-period span{font-weight:700;color:var(--c-text)}
  .case-btn{
    font-size:13px;font-weight:600;color:var(--c-primary);
    text-decoration:none;display:inline-flex;align-items:center;gap:4px;
    transition:gap .2s;
  }
  .case-btn:hover{gap:8px}
  .case-timeline{
    background:var(--c-bg);padding:16px 24px;
    display:flex;gap:0;
    border-top:1px solid var(--c-border);
    overflow-x:auto;
  }
  .tl-item{min-width:120px;flex-shrink:0;position:relative;padding-left:16px}
  .tl-item::before{content:'';position:absolute;left:0;top:6px;width:8px;height:8px;border-radius:50%;background:var(--c-primary)}
  .tl-item::after{content:'';position:absolute;left:4px;top:14px;bottom:-16px;width:1px;background:var(--c-border)}
  .tl-item:last-child::after{display:none}
  .tl-date{font-size:11px;font-weight:700;color:var(--c-muted);display:block}
  .tl-event{font-size:12px;color:var(--c-text);line-height:1.4;margin-top:2px}

  /* === TESTIMONIALS === */
  .testimonials{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
  .testimonial{
    background:var(--c-bg);border:1px solid var(--c-border);
    border-radius:var(--radius);padding:24px;
  }
  .testi-stars{color:#F59E0B;font-size:14px;margin-bottom:12px;letter-spacing:2px}
  .testi-text{font-size:14px;color:var(--c-text);line-height:1.7;margin-bottom:16px;font-style:italic}
  .testi-author{display:flex;align-items:center;gap:12px}
  .testi-avatar{width:40px;height:40px;border-radius:50%;background:var(--c-primary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;flex-shrink:0}
  .testi-name{font-size:14px;font-weight:700}
  .testi-role{font-size:12px;color:var(--c-muted)}

  /* === CTA === */
  .cta-section{
    background:linear-gradient(135deg,#1E40AF,#312E81);
    border-radius:var(--radius);margin:0 24px 72px;
    padding:64px 24px;text-align:center;
    position:relative;overflow:hidden;
  }
  .cta-section::before{
    content:'';position:absolute;inset:0;
    background:url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.03' fill-rule='evenodd'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
  }
  .cta-section h2{font-size:clamp(22px,3vw,36px);font-weight:800;color:#fff;margin-bottom:12px;position:relative}
  .cta-section p{color:rgba(255,255,255,.7);font-size:16px;margin-bottom:32px;position:relative}
  .cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;position:relative}
  .btn-primary-lg{
    background:#fff;color:var(--c-primary);
    font-size:15px;font-weight:700;padding:14px 32px;border-radius:var(--radius-sm);
    text-decoration:none;transition:all .2s;
    display:inline-flex;align-items:center;gap:8px;
  }
  .btn-primary-lg:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
  .btn-outline-lg{
    border:1px solid rgba(255,255,255,.35);color:#fff;
    font-size:15px;font-weight:600;padding:14px 32px;border-radius:var(--radius-sm);
    text-decoration:none;transition:all .2s;
  }
  .btn-outline-lg:hover{background:rgba(255,255,255,.1)}

  /* === RESPONSIVE === */
  @media(max-width:768px){
    .nav-links,.nav-cta,.hamburger{display:none}
    .hamburger{display:flex;margin-left:auto}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
    .cases-grid{grid-template-columns:1fr}
    .case-metrics{grid-template-columns:repeat(3,1fr)}
  }