:root {
      --primary: #059669;
      --primary-dark: #047857;
      --primary-light: #10B981;
      --secondary: #0891B2;
      --secondary-light: #06B6D4;
      --accent: #064E3B;
      --bg-light: #ECFDF5;
      --bg-blue: #F0F9FF;
      --white: #ffffff;
      --gray-10: #fdfdfd;
      --gray-50: #f9fafb;
      --gray-100: #f3f4f6;
      --gray-200: #e5e7eb;
      --gray-300: #d1d5db;
      --gray-400: #9ca3af;
      --gray-500: #6b7280;
      --gray-600: #4b5563;
      --gray-700: #374151;
      --gray-800: #1f2937;
      --gray-900: #111827;
      --green-100: #d1fae5;
      --green-200: #a7f3d0;
      --green-300: #6ee7b7;
      --green-400: #34d399;
      --green-800: #065f46;
      --green-900: #064e3b;
      --cyan-100: #cffafe;
      --cyan-300: #67e8f9;
      --cyan-400: #22d3ee;
      --blue-100: #dbeafe;
      --blue-300: #93c5fd;
      --blue-600: #2563eb;
      --blue-800: #1e40af;
      --emerald-10: #e8faf0;
      --emerald-100: #d1fae5;
      --emerald-400: #34d399;
      --emerald-600: #059669;
      --emerald-900: #064e3b;
      --teal-10: #fcfffb;
      --teal-100: #ccfbf1;
      --teal-300: #5eead4;
      --teal-400: #2dd4bf;
      --teal-600: #0d9488;
      --amber-100: #fef3c7;
      --amber-300: #fcd34d;
      --amber-400: #fbbf24;
      --amber-600: #d97706;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; background: var(--white); color: var(--gray-800); overflow-x: hidden; line-height: 1.6; }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; height: auto; }
    .container { max-width: 1280px; margin: 0 auto; padding: 0 16px; }
    @media (min-width: 640px) { .container { padding: 0 24px; } }
    @media (min-width: 1024px) { .container { padding: 0 32px; } }

    .gradient-green { background: linear-gradient(135deg, #059669 0%, #10B981 50%, #06B6D4 100%); }
    .card-hover { transition: all 0.3s ease; }
    .card-hover:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(5, 150, 105, 0.15); }

    .fade-in { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
    .fade-in.visible { opacity: 1; transform: translateY(0); }
    .stat-card { background: rgba(255,255,255,0.9); }
    .hero-overlay { background: linear-gradient(180deg, rgba(5,150,105,0.7) 0%, rgba(6,78,59,0.5) 50%, rgba(8,145,178,0.3) 100%); }
    .icon-glow { filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.5)); }
    @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
    .float-animation { animation: float 3s ease-in-out infinite; }
    @keyframes bounce { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, -10px); } }
    .animate-bounce { animation: bounce 1.5s ease-in-out infinite; }

    /* Navigation */
    #navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 50; transition: all 0.3s; background: linear-gradient(90deg, rgba(170, 201, 165, 0.8) 15%,rgba(41, 118, 27, 0.81)40%, rgba(41, 118, 27, 0.82)70%, rgba(41, 118, 27, 0.85) 100%); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,255,255,0.08); }
    #navbar.scrolled { background: rgba(255,255,255,0.95) !important; box-shadow: 0 4px 12px rgba(0,0,0,0.1); border-bottom-color: transparent; }
    #navbar.scrolled::after { display: none; }
    .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
    @media (min-width: 1024px) { .nav-inner { height: 80px; } }
    .nav-links { display: none; align-items: center; gap: 32px; }
    @media (min-width: 1024px) { .nav-links { display: flex; } }
    .nav-link-item { font-size: 15px; font-weight: 500; transition: color 0.2s; position: relative; color: rgba(255,255,255,0.9); }
    #navbar.scrolled .nav-link-item { color: var(--gray-700); }
    .nav-link-item:hover { color: var(--white); }
    #navbar.scrolled .nav-link-item:hover { color: var(--primary); }
    .nav-link-item::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--primary-light); transition: width 0.3s ease; }
    .nav-link-item:hover::after { width: 100%; }
    .logo-text { color: var(--white); font-weight: 700; font-size: 18px; }
    @media (min-width: 1024px) { .logo-text { font-size: 20px; } }
    #navbar.scrolled .logo-text { color: var(--primary); }
    .logo-sub { color: var(--green-200); font-size: 12px; display: block; margin-top: -4px; }
    #navbar.scrolled .logo-sub { color: var(--gray-500); }
    #mobile-menu-btn { display: block; background: none; border: none; padding: 8px; cursor: pointer; color: var(--white); }
    @media (min-width: 1024px) { #mobile-menu-btn { display: none; } }
    #navbar.scrolled #mobile-menu-btn { color: var(--gray-700); }
    #mobile-menu { display: none; background: rgba(4,120,87,0.95); backdrop-filter: blur(12px); }
    #mobile-menu.show { display: block; }
    #mobile-menu a { display: block; padding: 12px 16px; color: rgba(255,255,255,0.9); font-size: 14px; transition: color 0.2s; }
    #mobile-menu a:hover { color: var(--white); }

    /* Dropdown */
    .dropdown { position: relative; }
    .dropdown-toggle { display: flex; align-items: center; gap: 4px; cursor: pointer; font-size: 15px; font-weight: 500; transition: color 0.2s; color: rgba(255,255,255,0.9); }
    #navbar.scrolled .dropdown-toggle { color: var(--gray-700); }
    .dropdown-toggle:hover { color: var(--white); }
    #navbar.scrolled .dropdown-toggle:hover { color: var(--primary); }
    .dropdown-toggle .arrow { width: 14px; height: 14px; transition: transform 0.3s ease; }
    .dropdown:hover .arrow { transform: rotate(180deg); }
    .dropdown-menu {
      position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(10px);
      min-width: 180px; background: var(--white); border-radius: 12px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.15); opacity: 0; visibility: hidden;
      transition: all 0.3s ease; padding: 8px 0; z-index: 100;
    }
    .dropdown-menu::before {
      content: ''; position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
      width: 0; height: 0; border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 8px solid var(--white);
    }
    .dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
    .dropdown-menu a {
      display: block; padding: 10px 20px; color: var(--gray-600); font-size: 14px;
      transition: all 0.2s ease; white-space: nowrap;
    }
    .dropdown-menu a:hover { background: var(--bg-light); color: var(--primary); padding-left: 24px; }



    /* Footer */
    .footer { background: var(--gray-900); color: var(--white); }
    .footer-main { padding: 48px 0; }
    @media (min-width: 1024px) { .footer-main { padding: 64px 0; } }
    .footer-grid { display: flex; gap: 32px; justify-content: space-between; flex-wrap: wrap; }
    @media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }
    @media (min-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr 1fr 1fr 1.2fr; gap: 32px; } }
    .footer-brand { }
    @media (min-width: 640px) { .footer-brand { grid-column: span 2; } }
    @media (min-width: 768px) { .footer-brand { grid-column: span 4; } }
    @media (min-width: 1024px) { .footer-brand { grid-column: span 1; } }
    .footer-brand-inner { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
    .footer-brand-inner svg { width: 40px; height: 40px; }
    .footer-brand-name { font-weight: 700; font-size: 18px; }
    .footer-brand-sub { color: var(--green-400); font-size: 12px; display: block; }
    .footer-brand p { color: var(--gray-400); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
    .footer-social { display: flex; gap: 16px; }
    .footer-social a { width: 32px; height: 32px; border-radius: 50%; background: var(--gray-800); display: flex; align-items: center; justify-content: center; transition: background 0.2s; cursor: pointer; }
    .footer-social a:hover { background: var(--primary); }
    .footer-social a svg { width: 16px; height: 16px; color: var(--gray-400); }
     
    .footer-col h4 { font-weight: 600; margin-bottom: 16px; }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 8px; }
    .footer-col a { color: var(--gray-400); font-size: 14px; transition: color 0.2s; }
    .footer-col a:hover { color: var(--green-400); }
    .footer-contact-item { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 12px; }
    .footer-contact-item svg { width: 16px; height: 16px; color: var(--gray-400); flex-shrink: 0; margin-top: 4px; }
    .footer-contact-item span { color: var(--gray-400); font-size: 14px; }
    .footer-bottom { border-top: 1px solid var(--gray-800); padding: 32px 0; }
    .footer-bottom-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }
    @media (min-width: 768px) { .footer-bottom-inner { flex-direction: row; justify-content: space-between; } }
    .footer-bottom p { color: var(--gray-500); font-size: 12px; }
    .footer-bottom-links { display: flex; align-items: center; gap: 16px; }
    .footer-bottom-links a { color: var(--gray-500); font-size: 12px; transition: color 0.2s; }
    .footer-bottom-links a:hover { color: var(--green-400); }
    .footer-bottom-links .sep { color: var(--gray-700); font-size: 12px;}

    /* Back to top */
    #back-to-top {
      position: fixed; bottom: 24px; right: 24px; width: 48px; height: 48px;
      background: var(--primary); color: var(--white); border-radius: 50%; border: none;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15); display: flex; align-items: center; justify-content: center;
      opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 50; cursor: pointer;
    }
    #back-to-top.show { opacity: 1; pointer-events: auto; }
    #back-to-top:hover { background: var(--primary-dark); }
    #back-to-top svg { width: 20px; height: 20px; }

    /* Utility */
    .hidden { display: none; }
    .block { display: block; }
    .inline-flex { display: inline-flex; }
    .flex { display: flex; }
    .items-center { align-items: center; }
    .justify-center { justify-content: center; }
    .space-x-3 { gap: 12px; }
    .text-center { text-align: center; }
    .text-sm { font-size: 14px; }
    .text-xs { font-size: 12px; }
    .font-medium { font-weight: 500; }
    .font-bold { font-weight: 700; }
    .text-white { color: var(--white); }
    .text-primary { color: var(--primary); }
    .transition-colors { transition: color 0.2s; }
    .cursor-pointer { cursor: pointer; }
    .rounded-full { border-radius: 9999px; }
    .rounded-xl { border-radius: 12px; }
    .rounded-2xl { border-radius: 16px; }
    .overflow-hidden { overflow: hidden; }
    .relative { position: relative; }
    .absolute { position: absolute; }
    .w-full { width: 100%; }
    .h-full { height: 100%; }
    .object-cover { object-fit: cover; }
    .shadow-lg { box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
    .shadow-2xl { box-shadow: 0 25px 50px rgba(0,0,0,0.15); }
    .p-6 { padding: 24px; }
    .mb-2 { margin-bottom: 8px; }
    .mb-3 { margin-bottom: 12px; }
    .mb-4 { margin-bottom: 16px; }
    .mb-6 { margin-bottom: 24px; }
    .mb-8 { margin-bottom: 32px; }
    .mb-10 { margin-bottom: 40px; }
    .mt-3 { margin-top: 12px; }
    .mt-6 { margin-top: 24px; }
    .mt-8 { margin-top: 32px; }
    .mt-10 { margin-top: 40px; }
    .mt-12 { margin-top: 48px; }
    .mx-auto { margin-left: auto; margin-right: auto; }
    .line-clamp-2 { overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }