:root {
  --green-900:#1a4a2e;--green-800:#1e5e38;--green-700:#256b41;
  --green-600:#2e7d4f;--green-500:#3a9960;--green-400:#4fb87a;
  --green-300:#7dcf9e;--green-100:#d4f4e1;--green-50:#eaf8f0;
  --blue-900:#0d2a4e;--blue-800:#1a3f6f;--blue-700:#1e4d8c;
  --blue-600:#2563a8;--blue-500:#2d74c4;--blue-400:#4d91da;
  --gray-900:#1a1f2e;--gray-800:#2d3341;--gray-700:#3d4455;
  --gray-600:#525a6b;--gray-400:#8b93a6;--gray-200:#e2e5ec;
  --gray-100:#f4f6f9;--gray-50:#f9fafc;
  --gold:#c9a227;--white:#ffffff;
  --shadow-sm:0 1px 4px rgba(0,0,0,0.08);
  --shadow-md:0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.16);
  --shadow-xl:0 16px 48px rgba(0,0,0,0.20);
  --radius-sm:8px;--radius-md:14px;
  --transition:all 0.28s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Prompt','Sarabun',sans-serif;background:var(--gray-100);color:var(--gray-900);line-height:1.65;min-height:100vh;display:flex;flex-direction:column}
a{text-decoration:none;color:inherit}
::-webkit-scrollbar{width:7px}
::-webkit-scrollbar-track{background:var(--gray-100)}
::-webkit-scrollbar-thumb{background:var(--green-400);border-radius:4px}

/* HEADER */
header{background:linear-gradient(135deg,var(--green-900) 0%,var(--green-800) 40%,var(--blue-900) 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,0.35)}
.header-top-bar{background:rgba(0,0,0,0.2);display:flex;justify-content:flex-end;align-items:center;gap:.5rem;padding:.4rem 2rem;font-size:.78rem;color:rgba(255,255,255,.65)}
.dot{font-size:.4rem;color:var(--green-400)}
.header-main{display:flex;align-items:center;justify-content:space-between;padding:1.1rem 2.5rem;gap:1rem}
.header-brand{display:flex;align-items:center;gap:1rem}
.header-logo-circle{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--green-500),var(--blue-600));display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.18);flex-shrink:0}
.header-title-group h1{font-size:clamp(.9rem,2.2vw,1.25rem);font-weight:700;color:#fff;line-height:1.3;letter-spacing:.02em}
.header-title-group p{font-size:.78rem;color:rgba(255,255,255,.65);font-weight:300;margin-top:.1rem}
nav.main-nav{background:rgba(0,0,0,.18);border-top:1px solid rgba(255,255,255,.08)}
.nav-inner{display:flex;align-items:center;padding:0 2.5rem;max-width:1400px;margin:0 auto}
.nav-link{display:flex;align-items:center;gap:.45rem;padding:.8rem 1.2rem;font-size:.88rem;font-weight:500;color:rgba(255,255,255,.80);border-bottom:3px solid transparent;transition:var(--transition);cursor:pointer;white-space:nowrap}
.nav-link:hover,.nav-link.active{color:#fff;border-bottom-color:var(--green-400);background:rgba(255,255,255,.06)}
.nav-link i{font-size:.85rem}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.4rem;cursor:pointer;padding:.4rem}

/* HERO */
.hero{background:linear-gradient(160deg,var(--green-800) 0%,var(--green-700) 35%,var(--blue-800) 100%);padding:3.5rem 2.5rem 4.5rem;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-60px;right:-60px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.04)}
.hero::after{content:'';position:absolute;bottom:-80px;left:-30px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.03)}
.hero-inner{max-width:1400px;margin:0 auto;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:.4rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:100px;padding:.3rem .9rem;font-size:.78rem;color:rgba(255,255,255,.9);margin-bottom:1rem}
.hero h2{font-size:clamp(1.5rem,3.5vw,2.4rem);font-weight:700;color:#fff;line-height:1.4;margin-bottom:.75rem}
.hero p{font-size:clamp(.9rem,1.8vw,1.05rem);color:rgba(255,255,255,.78);max-width:680px;font-weight:300}
.hero-stats{display:flex;gap:2.5rem;margin-top:2rem;flex-wrap:wrap}
.stat-number{font-size:1.75rem;font-weight:700;color:var(--green-300);line-height:1}
.stat-label{font-size:.8rem;color:rgba(255,255,255,.65);margin-top:.2rem}

/* MAIN */
main{flex:1;max-width:1400px;width:100%;margin:0 auto;padding:2.5rem 2rem}
.page-section{display:none}
.page-section.active{display:block}

/* SECTION HEADING */
.section-heading{display:flex;align-items:center;gap:.75rem;margin-bottom:1.75rem}
.section-heading-icon{width:44px;height:44px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--green-600),var(--green-500));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;flex-shrink:0;box-shadow:var(--shadow-sm)}
.section-heading-text h3{font-size:1.2rem;font-weight:700;color:var(--gray-900)}
.section-heading-text p{font-size:.82rem;color:var(--gray-600)}

/* CARDS GRID */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-bottom:2.5rem}
.menu-card{background:#fff;border-radius:var(--radius-md);border:1px solid var(--gray-200);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);display:flex;flex-direction:column}
.menu-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:var(--green-300)}
.menu-card-accent{height:5px;background:linear-gradient(90deg,var(--green-500),var(--blue-500))}
.menu-card-accent.b{background:linear-gradient(90deg,var(--blue-600),var(--blue-400))}
.menu-card-accent.gold{background:linear-gradient(90deg,var(--gold),#e8c84c)}
.menu-card-body{padding:1.6rem 1.6rem 1.2rem;flex:1}
.menu-card-icon-wrap{width:52px;height:52px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:#fff;margin-bottom:1rem}
.icon-green{background:linear-gradient(135deg,var(--green-600),var(--green-400))}
.icon-blue{background:linear-gradient(135deg,var(--blue-700),var(--blue-500))}
.icon-teal{background:linear-gradient(135deg,#0e7490,#06b6d4)}
.icon-gold{background:linear-gradient(135deg,#92400e,var(--gold))}
.icon-purple{background:linear-gradient(135deg,#6d28d9,#a78bfa)}
.menu-card-title{font-size:1rem;font-weight:700;color:var(--gray-900);margin-bottom:.5rem;line-height:1.4}
.menu-card-desc{font-size:.82rem;color:var(--gray-600);font-weight:300;line-height:1.6}
.menu-card-footer{padding:.9rem 1.6rem;border-top:1px solid var(--gray-100);display:flex;align-items:center;justify-content:space-between}
.card-link-btn{display:inline-flex;align-items:center;gap:.4rem;font-size:.82rem;font-weight:600;color:var(--green-700);transition:var(--transition)}
.card-link-btn:hover{color:var(--green-500);gap:.65rem}
.card-tag{font-size:.72rem;background:var(--green-50);color:var(--green-700);border:1px solid var(--green-100);border-radius:100px;padding:.18rem .7rem}

/* DOWNLOAD */
.download-group{margin-bottom:2.2rem}
.download-group-label{display:flex;align-items:center;gap:.6rem;font-size:.78rem;font-weight:600;color:var(--gray-400);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:2px solid var(--gray-200)}
.download-card{background:#fff;border-radius:var(--radius-md);border:1px solid var(--gray-200);padding:1.1rem 1.4rem;display:flex;align-items:center;gap:1rem;margin-bottom:.75rem;transition:var(--transition);box-shadow:var(--shadow-sm)}
.download-card:hover{border-color:var(--green-300);transform:translateX(4px);box-shadow:var(--shadow-md)}
.dl-file-icon{width:46px;height:46px;border-radius:var(--radius-sm);background:linear-gradient(135deg,#dc2626,#f87171);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0}
.dl-info{flex:1;min-width:0}
.dl-name{font-size:.9rem;font-weight:600;color:var(--gray-900);margin-bottom:.25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dl-meta{display:flex;align-items:center;gap:1rem;font-size:.75rem;color:var(--gray-400)}
.dl-meta span{display:flex;align-items:center;gap:.3rem}
.dl-count{display:flex;align-items:center;gap:.25rem;font-size:.78rem;color:var(--green-700);font-weight:600;white-space:nowrap;flex-shrink:0}
.dl-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;background:linear-gradient(135deg,var(--green-600),var(--green-500));color:#fff;border-radius:var(--radius-sm);font-size:.8rem;font-weight:600;transition:var(--transition);white-space:nowrap;flex-shrink:0;box-shadow:0 2px 8px rgba(46,125,79,.3)}
.dl-btn:hover{background:linear-gradient(135deg,var(--green-700),var(--green-600));box-shadow:0 4px 16px rgba(46,125,79,.4);transform:translateY(-1px)}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:2fr 1fr;gap:1.75rem;margin-bottom:2rem}
.about-card{background:#fff;border-radius:var(--radius-md);border:1px solid var(--gray-200);padding:2rem;box-shadow:var(--shadow-sm)}
.about-card h4{font-size:1rem;font-weight:700;color:var(--green-800);margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}
.about-card p{font-size:.9rem;color:var(--gray-700);line-height:1.8;font-weight:300}
.contact-item{display:flex;align-items:flex-start;gap:.85rem;padding:.85rem 0;border-bottom:1px solid var(--gray-100)}
.contact-item:last-child{border-bottom:none}
.contact-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--green-50);border:1px solid var(--green-100);display:flex;align-items:center;justify-content:center;color:var(--green-700);font-size:.9rem;flex-shrink:0}
.contact-text strong{display:block;font-size:.78rem;color:var(--gray-400);font-weight:500;text-transform:uppercase;letter-spacing:.06em;margin-bottom:.2rem}
.contact-text span{font-size:.88rem;color:var(--gray-800);font-weight:400;line-height:1.55}
.testimonial-card{background:linear-gradient(135deg,var(--green-900) 0%,var(--blue-900) 100%);border-radius:var(--radius-md);padding:2rem;color:#fff;position:relative;overflow:hidden}
.testimonial-card::before{content:'\201C';font-size:8rem;line-height:0;position:absolute;top:3rem;right:1.5rem;color:rgba(255,255,255,.07);font-family:Georgia,serif}
.testimonial-card h4{font-size:.88rem;font-weight:600;color:var(--green-300);margin-bottom:1rem;text-transform:uppercase;letter-spacing:.08em}
.testimonial-card p{font-size:.9rem;color:rgba(255,255,255,.82);line-height:1.8;font-weight:300;position:relative;z-index:1}

/* FOOTER */
footer{background:linear-gradient(135deg,var(--gray-900) 0%,var(--green-900) 100%);color:rgba(255,255,255,.65);text-align:center;padding:1.5rem 2rem;font-size:.82rem;font-weight:300;border-top:1px solid rgba(255,255,255,.06)}
footer span{color:var(--green-300)}

/* BACK TO TOP */
.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--green-600),var(--green-500));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1rem;cursor:pointer;box-shadow:var(--shadow-lg);transition:var(--transition);opacity:0;pointer-events:none;border:none}
.back-to-top.show{opacity:1;pointer-events:all}
.back-to-top:hover{transform:translateY(-3px);box-shadow:var(--shadow-xl)}

/* ANIMATIONS */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .45s ease both}
.a1{animation-delay:.08s}.a2{animation-delay:.16s}.a3{animation-delay:.24s}.a4{animation-delay:.32s}.a5{animation-delay:.40s}

/* RESPONSIVE */
@media(max-width:1024px){.cards-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
  .header-main{padding:.9rem 1.2rem}
  .hero{padding:2rem 1.2rem 3rem}
  main{padding:1.5rem 1rem}
  .nav-toggle{display:block}
  .nav-inner{flex-direction:column;align-items:flex-start;padding:0 1.2rem;max-height:0;overflow:hidden;transition:max-height .3s ease}
  .nav-inner.open{max-height:320px}
  .nav-link{padding:.7rem 0;width:100%;border-bottom:1px solid rgba(255,255,255,.06);border-left:3px solid transparent}
  .nav-link:hover,.nav-link.active{border-bottom:1px solid rgba(255,255,255,.06);border-left:3px solid var(--green-400)}
  .header-top-bar{display:none}
  .dl-name{white-space:normal}
  .about-grid{grid-template-columns:1fr}
}
@media(max-width:600px){.cards-grid{grid-template-columns:1fr}}