/* ========== RESET & BASE ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: 'Noto Sans SC', sans-serif;
      background: #f0f4f9;
      color: #0f2740;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }
    ul { list-style: none; }
    img { max-width: 100%; display: block; }

    /* ========== CSS VARIABLES ========== */
    :root {
      --brand-blue: #2b5a8c;
      --brand-dark: #0f2740;
      --brand-light: #8aaac8;
      --bg: #f0f4f9;
      --card: #ffffff;
      --border: rgba(43, 90, 140, 0.15);
      --text-muted: #5a7a99;
      --bg-tint: #e6eef7;
    }

    /* ========== UTILITY ========== */
    .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
    .section { padding: 96px 0; }

    /* ========== NAV ========== */
    .nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
      transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
      height: 56px;
      background: rgba(255,255,255,0.95);
      border-bottom: 1px solid rgba(43,90,140,0.08);
      box-shadow: 0 1px 8px rgba(15,39,64,0.06);
    }
    .nav.scrolled {
      background: var(--brand-dark);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      box-shadow: 0 2px 24px rgba(15,39,64,0.18);
    }
    .nav .nav-logo-light { opacity: 1; transition: opacity 0.3s; }
    .nav .nav-logo-dark  { opacity: 0; transition: opacity 0.3s; }
    .nav.scrolled .nav-logo-light { opacity: 0; }
    .nav.scrolled .nav-logo-dark  { opacity: 1; }
    .nav-inner {
      max-width: 1280px; margin: 0 auto; padding: 0 24px;
      display: flex; align-items: center; justify-content: space-between;
      height: 100%;
    }
    .nav-brand { display: flex; align-items: center; gap: 8px; }
    .nav-brand-icon {
      position: relative;
      height: 50px;
      display: flex; align-items: center; justify-content: center;
    }
    .nav-brand-name {
      font-weight: 600; font-size: 14px; letter-spacing: 0.5px;
      transition: color 0.3s;
    }
    .nav-brand-badge {
      font-size: 11px; padding: 2px 6px; border-radius: 4px;
      background: rgba(43,90,140,0.15); font-family: 'Noto Sans SC', sans-serif;
      transition: color 0.3s;
    }
    .nav-links { display: flex; align-items: center; gap: 24px; }
    .nav-links button {
      font-size: 13px; color: var(--brand-dark); opacity: 0.8;
      transition: color 0.2s, opacity 0.2s;
    }
    .nav-links button:hover { opacity: 1; }
    .nav.scrolled .nav-links button { color: #fff; opacity: 1; }
    .nav.scrolled .nav-brand-name { color: #fff; }
    .nav.scrolled .nav-brand-badge { color: rgba(255,255,255,0.7); }
    .nav-actions { display: flex; align-items: center; gap: 12px; }
    .btn-outline {
      font-size: 13px; padding: 6px 16px; border-radius: 6px;
      border: 1px solid var(--brand-blue); color: var(--brand-blue);
      transition: all 0.2s;
    }
    .btn-outline:hover { opacity: 0.8; }
    .nav.scrolled .btn-outline { border-color: rgba(255,255,255,0.3); color: #fff; }
    .nav-menu-btn { display: none; }

    .mobile-menu {
      display: none; padding: 0 24px 16px; flex-direction: column; gap: 12px;
      background: var(--brand-dark);
    }
    .mobile-menu button { font-size: 13px; color: rgba(255,255,255,0.8); text-align: left; padding: 4px 0; }
    .mobile-menu-actions { display: flex; gap: 12px; padding-top: 8px; }
    .mobile-menu-actions button { flex: 1; text-align: center; padding: 6px 0; border-radius: 6px; font-size: 13px; }
    .mobile-menu-actions .btn-outline-m { border: 1px solid rgba(255,255,255,0.3); color: #fff; }
    .mobile-menu-actions .btn-solid-m { background: var(--brand-blue); color: #fff; font-weight: 500; }

    /* ========== HERO ========== */
    .hero {
      min-height: 100vh; display: flex; align-items: center;
      background: linear-gradient(135deg, var(--brand-dark) 0%, #1a3d6b 55%, var(--brand-blue) 100%);
      position: relative;
    }
    .hero-grid {
      position: absolute; inset: 0; opacity: 0.05;
      background-image: linear-gradient(rgba(255,255,255,0.6) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(255,255,255,0.6) 1px, transparent 1px);
      background-size: 60px 60px;
    }
    .hero-content {
      position: relative; max-width: 1280px; margin: 0 auto; width: 100%;
      padding: 88px 24px;
    }
    .hero-grid-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
    .hero h1 { font-size: 48px; font-weight: 700; line-height: 1.15; color: #fff; letter-spacing: -0.02em; margin-bottom: 16px; }
    .hero h1 span { color: var(--brand-light); }
    .hero-subtitle { font-size: 16px; font-weight: 500; color: rgba(255,255,255,0.75); margin-bottom: 12px; }
    .hero-desc { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 520px; margin-bottom: 40px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; }
    .btn-glass {
      display: flex; align-items: center; gap: 8px; padding: 12px 24px;
      border-radius: 8px; font-size: 14px; font-weight: 500; color: #fff;
      background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
      transition: opacity 0.2s;
    }
    .btn-glass:hover { opacity: 0.8; }

    /* Hero panel */
    .hero-panel {
      background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
      border-radius: 12px; padding: 24px;
    }
    .hero-panel-title { font-size: 12px; font-family: 'Noto Sans SC', sans-serif; color: rgba(255,255,255,0.4); margin-bottom: 16px; font-weight: 500; }
    .hero-panel-row {
      display: flex; gap: 16px; padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .hero-panel-label { font-size: 11px; font-family: 'Noto Sans SC', sans-serif; color: rgba(255,255,255,0.4); width: 64px; flex-shrink: 0; margin-top: 2px; }
    .hero-panel-value { font-size: 13px; color: rgba(255,255,255,0.8); line-height: 1.6; }

    /* Scroll hint */
    .scroll-hint {
      position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
      display: flex; flex-direction: column; align-items: center; gap: 4px;
      color: rgba(255,255,255,0.3);
    }
    .scroll-hint svg { animation: bounce 2s infinite; }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
      40% { transform: translateY(-8px); }
      60% { transform: translateY(-4px); }
    }

    /* ========== SECTION HEADER ========== */
    .section-header { margin-bottom: 48px; }
    .section-header h2 { font-size: 28px; font-weight: 700; color: var(--brand-dark); margin-bottom: 8px; }
    .section-header p { font-size: 14px; color: var(--text-muted); }
    .section-header.dark h2 { color: #fff; }
    .section-header.dark p { color: rgba(255,255,255,0.5); }

    /* ========== ADVANTAGES ========== */
    .advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .adv-card {
      background: var(--card); border: 1px solid var(--border);
      border-radius: 12px; padding: 24px;
      box-shadow: 0 1px 4px rgba(15,39,64,0.06);
      transition: all 0.3s;
    }
    .adv-card:hover { transform: translateY(-4px); border-color: var(--brand-blue); box-shadow: 0 4px 20px rgba(43,90,140,0.15); }
    .adv-card-icon {
      width: 40px; height: 40px; border-radius: 8px; background: var(--bg-tint);
      display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
    }
    .adv-card h3 { font-size: 14px; font-weight: 600; color: var(--brand-dark); margin-bottom: 8px; line-height: 1.4; }
    .adv-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

    /* ========== CORE FUNCTIONS ========== */
    .features-section { background: var(--bg-tint); }
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .feature-card {
      background: var(--card); border: 1px solid var(--border);
      border-radius: 12px; overflow: hidden; cursor: pointer;
      transition: all 0.3s;
      box-shadow: 0 1px 4px rgba(15,39,64,0.06);
    }
    .feature-card.active { border-color: var(--brand-blue); box-shadow: 0 4px 20px rgba(43,90,140,0.15); }
    .feature-card-body { padding: 20px; }
    .feature-card-header { display: flex; align-items: flex-start; gap: 12px; }
    .feature-card-icon {
      width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      background: var(--bg-tint); transition: background 0.2s;
    }
    .feature-card.active .feature-card-icon { background: var(--brand-blue); }
    .feature-card-icon svg { transition: stroke 0.2s; }
    .feature-card.active .feature-card-icon svg { stroke: #fff; }
    .feature-card-title-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex: 1; min-width: 0; }
    .feature-card h3 { font-size: 14px; font-weight: 600; color: var(--brand-dark); line-height: 1.4; }
    .feature-card-chevron {
      flex-shrink: 0; transition: transform 0.2s; color: var(--brand-blue);
    }
    .feature-card.active .feature-card-chevron { transform: rotate(180deg); }
    .feature-card-summary { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
    .feature-card-detail {
      font-size: 12px; color: #3d5a73; line-height: 1.6; margin-top: 16px;
      padding-top: 16px; border-top: 1px solid var(--border);
      display: none;
    }
    .feature-card.active .feature-card-detail { display: block; }

    /* Extra tags */
    .extra-tags {
      margin-top: 32px; padding: 20px; border-radius: 12px;
      background: rgba(15,39,64,0.05); border: 1px solid var(--border);
    }
    .extra-tags h3 { font-size: 12px; font-weight: 600; color: var(--brand-dark); margin-bottom: 12px; }
    .extra-tags-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag {
      font-size: 12px; padding: 4px 10px; border-radius: 999px;
      background: var(--bg-tint); color: var(--brand-blue);
      border: 1px solid rgba(43,90,140,0.2);
    }

    /* ========== DETAIL SECTIONS ========== */
    .details-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .detail-card {
      background: var(--card); border: 1px solid var(--border);
      border-radius: 12px; padding: 24px;
      box-shadow: 0 1px 4px rgba(15,39,64,0.06);
      transition: all 0.3s;
    }
    .detail-card:hover { transform: translateY(-2px); border-color: var(--brand-blue); box-shadow: 0 4px 20px rgba(43,90,140,0.12); }
    .detail-card-num-row { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
    .detail-card-num { font-size: 28px; font-weight: 700; line-height: 1; font-family: 'Noto Sans SC', sans-serif; color: rgba(43,90,140,0.2); }
    .detail-card h3 { font-size: 14px; font-weight: 600; color: var(--brand-dark); padding-top: 2px; line-height: 1.4; }
    .detail-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; }
    .detail-card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
    .detail-card-tags span { font-size: 11px; padding: 2px 8px; border-radius: 4px; background: var(--bg-tint); color: var(--brand-blue); }

    /* ========== DEPLOYMENT ========== */
    .deploy-section { background: var(--brand-dark); }
    .deploy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .deploy-card {
      border-radius: 12px; padding: 24px; display: flex; flex-direction: column;
      transition: all 0.3s; position: relative;
    }
    .deploy-card.default { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); }
    .deploy-card.highlight { background: var(--brand-blue); border: 1px solid var(--brand-blue); }
    .deploy-badge {
      font-size: 11px; padding: 2px 8px; border-radius: 999px;
      font-family: 'Noto Sans SC', sans-serif; display: inline-block; margin-bottom: 12px;
    }
    .deploy-card.default .deploy-badge { background: rgba(43,90,140,0.3); color: var(--brand-light); }
    .deploy-card.highlight .deploy-badge { background: rgba(255,255,255,0.2); color: #fff; }
    .deploy-card h3 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 8px; }
    .deploy-card .deploy-target { font-size: 12px; line-height: 1.6; margin-bottom: 16px; }
    .deploy-card.default .deploy-target { color: rgba(255,255,255,0.5); }
    .deploy-card.highlight .deploy-target { color: rgba(255,255,255,0.75); }
    .deploy-features { display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .deploy-features li { display: flex; align-items: center; gap: 8px; font-size: 12px; }
    .deploy-card.default .deploy-features li { color: rgba(255,255,255,0.65); }
    .deploy-card.highlight .deploy-features li { color: rgba(255,255,255,0.85); }
    .deploy-card .btn-deploy {
      margin-top: 24px; width: 100%; padding: 10px 0; border-radius: 8px;
      font-size: 14px; font-weight: 500; transition: opacity 0.2s;
    }
    .deploy-card .btn-deploy:hover { opacity: 0.9; }
    .deploy-card.default .btn-deploy { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
    .deploy-card.highlight .btn-deploy { background: #fff; color: var(--brand-dark); }

    /* ========== INDUSTRIES ========== */
    .industries-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .industry-card {
      background: var(--card); border: 1px solid var(--border);
      border-radius: 12px; padding: 24px;
      box-shadow: 0 1px 4px rgba(15,39,64,0.06);
      transition: all 0.3s;
    }
    .industry-card:hover { transform: translateY(-2px); border-color: var(--brand-blue); box-shadow: 0 4px 20px rgba(43,90,140,0.12); }
    .industry-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
    .industry-card-icon {
      width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      background: var(--bg-tint);
    }
    .industry-card-tag { font-size: 11px; padding: 2px 8px; border-radius: 4px; background: var(--bg-tint); color: var(--brand-blue); }
    .industry-card h3 { font-size: 14px; font-weight: 600; color: var(--brand-dark); margin-bottom: 8px; line-height: 1.4; }
    .industry-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

    /* ========== SERVICES ========== */
    .services-section { background: var(--bg-tint); }
    .services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 40px; }
    .service-card {
      background: var(--card); border: 1px solid var(--border);
      border-radius: 12px; padding: 24px;
      box-shadow: 0 1px 4px rgba(15,39,64,0.06);
    }
    .service-card h3 { font-size: 16px; font-weight: 600; color: var(--brand-dark); margin-bottom: 8px; }
    .service-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; }
    .service-card-tags { display: flex; flex-wrap: wrap; gap: 8px; }

    /* Process timeline */
    .process-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
    .process-card h3 { font-size: 14px; font-weight: 600; color: var(--brand-dark); margin-bottom: 20px; }
    .process-steps { display: flex; flex-wrap: wrap; gap: 0; }
    .process-step { display: flex; align-items: center; }
    .process-step-inner { display: flex; flex-direction: column; align-items: center; }
    .process-step-num {
      width: 28px; height: 28px; border-radius: 50%;
      background: var(--brand-blue); color: #fff;
      display: flex; align-items: center; justify-content: center;
      font-size: 11px; font-weight: 700; font-family: 'Noto Sans SC', sans-serif;
    }
    .process-step-label { font-size: 11px; color: var(--brand-dark); text-align: center; margin-top: 6px; white-space: nowrap; }
    .process-step-line { width: 24px; height: 1px; background: rgba(43,90,140,0.25); margin: 0 4px 20px; }

    /* ========== CTA ========== */
    .cta-section {
      background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-blue) 100%);
      padding: 80px 0;
    }
    .cta-inner { max-width: 768px; margin: 0 auto; text-align: center; padding: 0 24px; }
    .cta-inner h2 { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 12px; }
    .cta-inner p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.6; margin-bottom: 32px; }
    .cta-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }

    /* ========== FOOTER ========== */
    .footer {
      background: var(--brand-dark); border-top: 1px solid rgba(255,255,255,0.06);
      padding: 32px 24px;
    }
    .footer-inner {
      max-width: 1280px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      flex-wrap: wrap; gap: 16px;
    }
    .footer-brand { display: flex; align-items: center; gap: 8px; }
    .footer-brand-icon {
      width: auto; height: auto; border-radius: 0;
      background: transparent;
      display: flex; align-items: center; justify-content: center;
    }
    .footer-brand-name { font-size: 14px; font-weight: 500; color: rgba(255,255,255,0.8); }
    .footer-links { display: flex; flex-wrap: wrap; gap: 24px; font-size: 12px; color: rgba(255,255,255,0.4); }
    .footer-copy { font-size: 12px; color: rgba(255,255,255,0.25); }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1024px) {
      .advantages-grid { grid-template-columns: repeat(2, 1fr); }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .details-grid { grid-template-columns: repeat(2, 1fr); }
      .industries-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hero-grid-layout { grid-template-columns: 1fr; gap: 40px; }
      .hero h1 { font-size: 32px; }
      .hero-panel { display: none; }
      .nav-links, .nav-actions { display: none; }
      .nav-menu-btn { display: flex; align-items: center; justify-content: center; color: var(--brand-dark); }
      .nav.scrolled .nav-menu-btn { color: #fff; }
      .mobile-menu.open { display: flex; }
      .advantages-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr; }
      .details-grid { grid-template-columns: 1fr; }
      .deploy-grid { grid-template-columns: 1fr; }
      .industries-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .section { padding: 64px 0; }
      .section-header h2 { font-size: 24px; }
      .footer-inner { flex-direction: column; text-align: center; }
      .process-steps { justify-content: center; }
    }

    /* ========== SVG ICON PLACEHOLDERS ========== */
    .icon-sm { width: 18px; height: 18px; }
    .icon-md { width: 20px; height: 20px; }
    .icon-lg { width: 24px; height: 24px; }