/* ===== Reset ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#1a3a5c;
  --blue-light:#2c5f8a;
  --blue-bright:#1e88e5;
  --teal:#00897b;
  --orange:#f57c00;
  --purple:#7b1fa2;
  --green:#388e3c;
  --red:#d32f2f;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-dark:#1a3a5c;
  --text:#1a1a2e;
  --text-2:#555;
  --text-3:#888;
  --border:#e0e4e8;
  --border-light:#eef1f4;
  --radius:12px;
  --radius-sm:8px;
  --max-w:1280px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:var(--max-w);margin:0 auto;padding:0 32px}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .25s ease;border:none;white-space:nowrap;font-family:var(--font)}
.btn-sm{padding:8px 18px;font-size:.82rem}
.btn-lg{padding:14px 32px;font-size:1rem}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-light);transform:translateY(-1px);box-shadow:0 4px 16px rgba(26,58,92,.25)}
.btn-ghost{background:transparent;color:var(--blue);border:2px solid var(--blue)}
.btn-ghost:hover{background:var(--blue);color:#fff}
.btn-white{background:#fff;color:var(--blue)}
.btn-white:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,0,0,.15)}
.btn-outline-white{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.5)}
.btn-outline-white:hover{border-color:#fff;background:rgba(255,255,255,.1)}

/* ===== Ribbon ===== */
.ribbon{background:var(--blue);color:#fff;padding:8px 0;font-size:.8rem}
.ribbon-inner{max-width:var(--max-w);margin:0 auto;padding:0 32px;display:flex;justify-content:space-between;align-items:center}
.ribbon-tag{font-weight:600;letter-spacing:.05em;opacity:.9}
.ribbon-right{display:flex;gap:24px}
.ribbon-right a{color:rgba(255,255,255,.85);transition:color .2s;font-size:.8rem}
.ribbon-right a:hover{color:#fff}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border-light);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 2px 12px rgba(0,0,0,.06)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:0 32px;height:72px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--blue)}
.brand-mark{width:36px;height:36px;background:var(--blue);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;font-weight:700}
.nav{display:flex;align-items:center;gap:28px}
.nav-item{font-size:.92rem;color:var(--text-2);font-weight:500;transition:color .2s;cursor:pointer;display:flex;align-items:center;gap:4px}
.nav-item:hover{color:var(--blue)}
.nav-caret{width:0;height:0;border-left:3px solid transparent;border-right:3px solid transparent;border-top:4px solid var(--text-3);transition:border-top-color .2s}
.nav-item:hover .nav-caret{border-top-color:var(--blue)}
.header-right{display:flex;align-items:center;gap:16px}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:5px}
.nav-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}
.nav-close{display:none}

/* ===== Hero ===== */
.hero{position:relative;min-height:560px;display:flex;align-items:center;background:linear-gradient(135deg,var(--blue) 0%,#0d2b45 50%,#1a3050 100%);overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.25}
.hero-bg::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:50px 50px;opacity:.5}
.hero-inner{position:relative;z-index:1;max-width:var(--max-w);margin:0 auto;padding:80px 32px 100px;text-align:center}
.hero-eyebrow{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:rgba(255,255,255,.7);padding:6px 18px;border:1px solid rgba(255,255,255,.2);border-radius:20px;margin-bottom:28px}
.hero-title{font-size:3.2rem;font-weight:800;letter-spacing:-.02em;line-height:1.15;color:#fff;margin-bottom:24px}
.hero-desc{font-size:1.15rem;color:rgba(255,255,255,.8);line-height:1.7;margin-bottom:36px}
.hero-cta{display:flex;gap:16px;justify-content:center}
.hero-wave{position:absolute;bottom:-1px;left:0;right:0;line-height:0}
.hero-wave svg{width:100%;height:60px}

/* ===== Trust Bar ===== */
.trust-bar{background:var(--bg-alt);padding:36px 0;text-align:center;border-bottom:1px solid var(--border-light)}
.trust-label{font-size:.82rem;color:var(--text-3);margin-bottom:16px;letter-spacing:.05em}
.trust-tags{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.trust-tags span{font-size:.82rem;font-weight:500;color:var(--text-2);padding:6px 16px;background:#fff;border:1px solid var(--border);border-radius:20px}

/* ===== Section ===== */
.section{padding:80px 0}
.section-head{text-align:center;max-width:640px;margin:0 auto 56px}
.section-eyebrow{display:inline-block;font-size:.75rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--blue-bright);margin-bottom:12px}
.section-title{font-size:2.2rem;font-weight:700;letter-spacing:-.02em;color:var(--text);margin-bottom:14px}
.section-sub{font-size:1rem;color:var(--text-2)}

/* ===== Cards ===== */
.card-grid{display:grid;gap:24px}
.card-grid-3{grid-template-columns:repeat(3,1fr)}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);padding:32px;transition:all .3s;position:relative}
.card:hover{border-color:var(--blue-bright);box-shadow:0 12px 32px rgba(26,58,92,.08);transform:translateY(-4px)}
.card-icon{width:52px;height:52px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card-icon svg{width:28px;height:28px}
.icon-blue{background:#e3f2fd;color:#1565c0}
.icon-teal{background:#e0f2f1;color:#00695c}
.icon-orange{background:#fff3e0;color:#e65100}
.icon-purple{background:#f3e5f5;color:#6a1b9a}
.icon-green{background:#e8f5e9;color:#2e7d32}
.icon-red{background:#ffebee;color:#c62828}
.card-title{font-size:1.2rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.card-text{font-size:.9rem;color:var(--text-2);line-height:1.6;margin-bottom:16px;flex:1}
.card-list{margin-bottom:20px}
.card-list li{font-size:.85rem;color:var(--text-2);padding:4px 0 4px 18px;position:relative}
.card-list li::before{content:'';position:absolute;left:0;top:12px;width:6px;height:1px;background:var(--blue-bright)}
.card-link{font-size:.85rem;font-weight:600;color:var(--blue-bright);transition:gap .2s}
.card:hover .card-link{color:var(--blue)}

/* ===== Industries ===== */
.section-industries{background:var(--bg-alt)}
.industries-row{display:flex;gap:20px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory}
.ind-card{min-width:280px;max-width:340px;flex:1;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);overflow:hidden;scroll-snap-align:start;transition:all .3s}
.ind-card:hover{box-shadow:0 12px 32px rgba(26,58,92,.08);transform:translateY(-4px)}
.ind-img{height:160px;background-size:cover;background-position:center;position:relative}
.ind-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to bottom,transparent 50%,rgba(0,0,0,.35))}
.ind-img-1{background-color:#1565c0}
.ind-img-2{background-color:#00695c}
.ind-img-3{background-color:#e65100}
.ind-img-4{background-color:#6a1b9a}
.ind-img-5{background-color:#2e7d32}
.ind-body{padding:24px}
.ind-num{font-size:.8rem;font-weight:700;color:var(--blue-bright);font-family:'Inter',monospace}
.ind-body h3{font-size:1.15rem;font-weight:700;margin:6px 0 8px}
.ind-body p{font-size:.85rem;color:var(--text-2);margin-bottom:12px;line-height:1.5}
.ind-tags{display:flex;flex-wrap:wrap;gap:6px}
.ind-tags span{font-size:.72rem;padding:4px 10px;background:var(--bg-alt);color:var(--text-2);border-radius:12px}

/* ===== Approach ===== */
.section-approach{background:#fff}
.approach-timeline{max-width:900px;margin:0 auto;position:relative}
.approach-line{position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--blue-bright),var(--border));transform:translateX(-50%)}
.approach-item{display:flex;align-items:center;margin-bottom:40px;position:relative}
.approach-item:nth-child(odd){justify-content:flex-start}
.approach-item:nth-child(even){justify-content:flex-end}
.approach-item:nth-child(odd) .approach-card{margin-right:auto;padding-right:40px}
.approach-item:nth-child(even) .approach-card{margin-left:auto;padding-left:40px;text-align:right}
.approach-dot{position:absolute;left:50%;transform:translateX(-50%);width:44px;height:44px;background:#fff;border:3px solid var(--blue-bright);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--blue);z-index:1}
.approach-card{width:42%;background:var(--bg-alt);border-radius:var(--radius);padding:24px}
.approach-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.approach-card p{font-size:.85rem;color:var(--text-2)}

/* ===== Cases ===== */
.section-cases{background:var(--bg-alt)}
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.case-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:all .3s}
.case-card:hover{box-shadow:0 12px 32px rgba(26,58,92,.08);transform:translateY(-4px)}
.case-value{font-size:2.6rem;font-weight:800;color:var(--blue);margin-bottom:4px}
.case-label{font-size:.95rem;font-weight:600;margin-bottom:10px}
.case-text{font-size:.8rem;color:var(--text-3);line-height:1.5}

/* ===== About ===== */
.section-about{background:#fff}
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:start}
.about-photo{border-radius:var(--radius);overflow:hidden;margin-bottom:24px;box-shadow:0 4px 16px rgba(0,0,0,.08)}
.about-photo img{width:100%;height:auto;display:block}
.about-text{font-size:1rem;color:var(--text-2);margin-bottom:16px;line-height:1.8}
.about-features{margin-top:28px;display:flex;flex-direction:column;gap:14px}
.about-feature{display:flex;align-items:center;gap:12px;font-size:.95rem;color:var(--text)}
.check{width:22px;height:22px;background:var(--green);border-radius:50%;flex-shrink:0;position:relative}
.check::after{content:'';position:absolute;left:6px;top:3px;width:6px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.info-card{background:var(--bg-alt);border:1px solid var(--border-light);border-radius:var(--radius);overflow:hidden}
.info-card-head{padding:16px 24px;background:var(--blue);color:#fff;font-weight:600;font-size:.9rem}
.info-card-body{padding:20px 24px}
.info-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border-light)}
.info-row:last-child{border-bottom:none}
.info-label{color:var(--text-3);font-size:.85rem}
.info-val{color:var(--text);font-size:.88rem;font-weight:600}

/* ===== CTA ===== */
.section-cta{padding:80px 0;background:var(--bg-alt)}
.cta-box{background:linear-gradient(135deg,var(--blue) 0%,#0d2b45 100%);border-radius:var(--radius);padding:60px 48px;text-align:center;color:#fff}
.cta-title{font-size:2.2rem;font-weight:700;margin-bottom:14px}
.cta-desc{font-size:1.05rem;color:rgba(255,255,255,.8);margin-bottom:32px}
.cta-actions{display:flex;gap:16px;justify-content:center;margin-bottom:48px}
.cta-info{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-top:32px;border-top:1px solid rgba(255,255,255,.15)}
.cta-info-item{text-align:center}
.cta-info-label{display:block;font-size:.75rem;color:rgba(255,255,255,.5);margin-bottom:4px}
.cta-info-val{font-size:.88rem;font-weight:500}

/* ===== Footer ===== */
.footer{background:#0d1b2a;color:rgba(255,255,255,.6);padding:60px 0 24px}
.footer-top{display:grid;grid-template-columns:1fr 2fr;gap:60px;margin-bottom:40px}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand .brand{color:#fff}
.footer-brand .brand-mark{background:#fff;color:var(--blue)}
.footer-tag{font-size:.85rem;opacity:.6}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.footer-col h4{font-size:.9rem;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:.85rem;padding:4px 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:.8rem;opacity:.5}

/* ===== Animations ===== */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .5s ease,transform .5s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .card-grid-3{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:2.6rem}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .approach-card{width:40%}
}
@media(max-width:768px){
  .ribbon-right{display:none}
  .nav{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:#fff;flex-direction:column;padding:80px 24px 24px;gap:8px;transition:right .3s;box-shadow:-4px 0 20px rgba(0,0,0,.1);z-index:200}
  .nav.active{right:0}
  .nav-close{display:block;position:absolute;top:20px;right:20px;font-size:1.5rem;background:none;border:none;cursor:pointer;color:var(--text)}
  .nav-toggle{display:flex}
  .hero-title{font-size:2rem}
  .hero-desc{font-size:1rem}
  .hero-cta{flex-direction:column;align-items:center}
  .hero-inner{padding:60px 24px 80px}
  .section{padding:56px 0}
  .section-title{font-size:1.7rem}
  .card-grid-3{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .industries-row{flex-direction:column;overflow-x:visible}
  .ind-card{min-width:auto;max-width:none}
  .approach-line{left:22px}
  .approach-dot{left:22px}
  .approach-item{justify-content:flex-end !important}
  .approach-item:nth-child(odd) .approach-card,.approach-item:nth-child(even) .approach-card{width:auto;margin:0 0 0 60px;padding:20px;text-align:left}
  .approach-item:nth-child(odd) .approach-card{padding-right:20px}
  .approach-item:nth-child(even) .approach-card{padding-left:20px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-cols{grid-template-columns:repeat(2,1fr)}
  .cta-box{padding:40px 24px}
  .cta-info{grid-template-columns:1fr}
  .cta-actions{flex-direction:column}
}
@media(max-width:480px){
  .hero-title{font-size:1.7rem}
  .section-title{font-size:1.4rem}
  .footer-cols{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}