/* ===== ESITC Intro Section ===== */
    .esitc-intro {
      padding: 120px 40px;
      background: var(--white);
    }
    .esitc-intro-inner {
      max-width: 1320px; margin: 0 auto;
    }
    .esitc-intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
    }
    .esitc-intro-text .section-desc {
      margin-bottom: 32px;
    }
    .esitc-intro-actions {
      display: flex; gap: 12px; flex-wrap: wrap;
    }
    .btn-primary {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 14px 32px; font-size: 15px; font-weight: 700;
      background: var(--blue); color: var(--white);
      border: none; border-radius: 10px;
      cursor: pointer; transition: var(--transition);
      font-family: var(--font-ko); text-decoration: none;
    }
    .btn-primary:hover {
      background: var(--blue-light);
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(30,109,212,0.4);
    }
    .btn-secondary {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 14px 32px; font-size: 15px; font-weight: 600;
      background: none; color: var(--gray-800);
      border: 1.5px solid var(--gray-200); border-radius: 10px;
      cursor: pointer; transition: var(--transition);
      text-decoration: none; font-family: var(--font-ko);
    }
    .btn-secondary:hover {
      border-color: var(--blue); color: var(--blue);
    }

    /* Screenshot Placeholder */
    .esitc-screenshot {
      background: var(--gray-50);
      border: 1px solid var(--gray-100);
      border-radius: var(--radius-lg);
      overflow: hidden;
      aspect-ratio: 4/3;
      display: flex; flex-direction: column;
    }
    .screenshot-bar {
      display: flex; align-items: center; gap: 6px;
      padding: 12px 16px;
      background: var(--white);
      border-bottom: 1px solid var(--gray-100);
    }
    .screenshot-dot {
      width: 10px; height: 10px; border-radius: 50%;
    }
    .screenshot-dot.red { background: #ff5f56; }
    .screenshot-dot.yellow { background: #ffbd2e; }
    .screenshot-dot.green { background: #27ca40; }
    .screenshot-url {
      flex: 1; margin-left: 8px;
      padding: 5px 12px;
      background: var(--gray-50);
      border-radius: 6px;
      font-family: var(--font-en);
      font-size: 12px; color: var(--gray-400);
    }
    .screenshot-body {
      flex: 1; display: flex;
      align-items: center; justify-content: center;
      padding: 40px;
    }
    .screenshot-placeholder {
      text-align: center;
    }
    .screenshot-placeholder svg {
      width: 64px; height: 64px; margin-bottom: 16px;
      opacity: 0.3;
    }
    .screenshot-placeholder p {
      font-size: 14px; color: var(--gray-400);
    }

    /* ===== Features Section ===== */
    .features {
      padding: 120px 40px;
      background: #fff;
    }
    .features-inner {
      max-width: 1320px; margin: 0 auto;
    }
    .features-header {
      text-align: center;
      margin-bottom: 64px;
    }
    .features-header .section-desc {
      margin-left: auto; margin-right: auto;
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      position: relative;
      background: var(--white);
      border: 1px solid var(--gray-100);
      border-radius: var(--radius-lg);
      transition: var(--transition);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .feature-card::before {
      content: '';
      position: absolute; top: 0; left: 0; right: 0;
      height: 3px; background: var(--blue); z-index: 1;
      transform: scaleX(0); transform-origin: left;
      transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .feature-card:hover {
      border-color: rgba(30,109,212,0.2);
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .feature-card:hover::before { transform: scaleX(1); }
    .feature-img {
      position: relative;
      aspect-ratio: 16/10;
      background: var(--gray-50);
      overflow: hidden;
    }
    .feature-img img {
      width: 100%; height: 100%;
      object-fit: cover;
      object-position: top left;
      transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .feature-card:hover .feature-img img {
      transform: scale(1.03);
    }
    .feature-img img[src=""] { display: none; }
    .feature-img-placeholder {
      position: absolute; inset: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: 13px; color: var(--gray-400);
      background: var(--gray-50);
    }
    .feature-img img[src=""]:not([src]) ~ .feature-img-placeholder,
    .feature-img img:not([src=""]) ~ .feature-img-placeholder { display: none; }
    .feature-text {
      padding: 24px 24px 28px;
    }
    .feature-card h3 {
      font-size: 17px; font-weight: 700;
      color: var(--navy); margin-bottom: 8px;
      word-break: keep-all;
    }
    .feature-card p {
      font-size: 14px; color: var(--gray-600);
      line-height: 1.7; word-break: keep-all;
    }

    /* ===== How to Use Section ===== */
    .how-to-use {
      padding: 120px 40px;
      background: var(--white);
    }
    .how-to-use-inner {
      max-width: 1320px; margin: 0 auto;
    }
    .how-to-use-header {
      text-align: center;
      margin-bottom: 72px;
    }
    .how-to-use-header .section-desc {
      margin-left: auto; margin-right: auto;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
    }
    /* Connecting line between steps */
    .steps-grid::before {
      content: '';
      position: absolute;
      top: 44px; left: 10%; right: 10%;
      height: 2px;
      background: linear-gradient(90deg, var(--blue-pale), var(--blue), var(--blue-pale));
      z-index: 0;
    }
    .step-item {
      text-align: center;
      position: relative;
      z-index: 1;
    }
    .step-number {
      width: 88px; height: 88px;
      background: var(--white);
      border: 2px solid var(--blue);
      border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      margin: 0 auto 24px;
      font-family: var(--font-en);
      font-size: 32px; font-weight: 800;
      color: var(--blue);
      transition: var(--transition);
    }
    .step-item:hover .step-number {
      background: var(--blue);
      color: var(--white);
      box-shadow: 0 8px 30px rgba(30,109,212,0.3);
    }
    .step-item h3 {
      font-size: 17px; font-weight: 700;
      color: var(--navy); margin-bottom: 8px;
      word-break: keep-all;
    }
    .step-item p {
      font-size: 14px; color: var(--gray-600);
      line-height: 1.6; word-break: keep-all;
    }

    /* ===== CTA Section ===== */
    .cta-section {
      padding: 100px 40px;
      background: var(--navy);
      position: relative;
      overflow: hidden;
    }
    .cta-section::before {
      content: ''; position: absolute; inset: 0;
      background:
        radial-gradient(ellipse at 20% 50%, rgba(30,109,212,0.3) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(79,195,247,0.15) 0%, transparent 50%);
    }
    .cta-inner {
      position: relative; z-index: 1;
      max-width: 720px; margin: 0 auto;
      text-align: center;
    }
    .cta-inner .section-label { color: var(--sky); }
    .cta-inner h2 {
      font-size: clamp(26px, 3.5vw, 38px);
      font-weight: 800; color: var(--white);
      margin-bottom: 16px; letter-spacing: -0.5px;
      word-break: keep-all;
    }
    .cta-inner p {
      font-size: 16px; color: rgba(255,255,255,0.55);
      margin-bottom: 40px; line-height: 1.7;
      word-break: keep-all;
    }
    .cta-buttons {
      display: flex; gap: 12px;
      justify-content: center; flex-wrap: wrap;
    }
    .btn-cta-primary {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 16px 36px; font-size: 16px; font-weight: 700;
      background: var(--blue); color: var(--white);
      border: none; border-radius: 10px;
      cursor: pointer; transition: var(--transition);
      font-family: var(--font-ko); text-decoration: none;
    }
    .btn-cta-primary:hover {
      background: var(--blue-light);
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(30,109,212,0.5);
    }
    .btn-cta-secondary {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 16px 36px; font-size: 16px; font-weight: 600;
      background: none; color: var(--white);
      border: 1.5px solid rgba(255,255,255,0.2); border-radius: 10px;
      cursor: pointer; transition: var(--transition);
      text-decoration: none; font-family: var(--font-ko);
    }
    .btn-cta-secondary:hover {
      border-color: rgba(255,255,255,0.5);
      background: rgba(255,255,255,0.05);
    }

    /* ===== Footer ===== */
    .footer {
      background: var(--navy);
      padding: 80px 40px 40px;
    }
    .footer-inner { max-width: 1320px; margin: 0 auto; }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
      gap: 40px; margin-bottom: 60px;
    }
    .footer-brand .footer-logo {
      display: flex; align-items: center; gap: 10px;
      margin-bottom: 20px;
    }
    .footer-desc {
      font-size: 13.5px; color: rgba(255,255,255,0.35);
      line-height: 1.8;
    }
    .footer-col-title {
      font-family: var(--font-en);
      font-size: 12px; font-weight: 700;
      text-transform: uppercase; letter-spacing: 1.5px;
      color: rgba(255,255,255,0.3); margin-bottom: 20px;
    }
    .footer-links { display: flex; flex-direction: column; gap: 12px; }
    .footer-links a {
      font-size: 14px; color: rgba(255,255,255,0.55);
      text-decoration: none; transition: var(--transition);
    }
    .footer-links a:hover { color: var(--white); }
    .footer-bottom {
      display: flex; justify-content: space-between;
      align-items: center;
      padding-top: 32px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-copy {
      font-family: var(--font-en);
      font-size: 13px; color: rgba(255,255,255,0.25);
    }
    .footer-legal { display: flex; gap: 24px; }
    .footer-legal a {
      font-size: 13px; color: rgba(255,255,255,0.25);
      text-decoration: none; transition: var(--transition);
    }
    .footer-legal a:hover { color: rgba(255,255,255,0.5); }

    /* ===== Scroll Animations ===== */
    .fade-up {
      opacity: 0; transform: translateY(30px);
      transition: opacity 0.7s, transform 0.7s;
    }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .delay-1 { transition-delay: 0.1s; }
    .delay-2 { transition-delay: 0.2s; }
    .delay-3 { transition-delay: 0.3s; }
    .delay-4 { transition-delay: 0.4s; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .esitc-intro-grid { grid-template-columns: 1fr; gap: 48px; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
      .steps-grid::before { display: none; }
      .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .nav-container { padding: 0 20px; }
      .mobile-menu-btn { display: flex; }
      .lang-switch, .btn-track { display: none; }
      .page-hero { padding: 100px 20px 20px; }
      .esitc-intro { padding: 80px 20px; }
      .features { padding: 80px 20px; }
      .features-grid { grid-template-columns: 1fr; }
      .how-to-use { padding: 80px 20px; }
      .steps-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
      .cta-section { padding: 80px 20px; }
      .footer { padding: 60px 20px 32px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    }
    @media (max-width: 480px) {
      .steps-grid { grid-template-columns: 1fr; }
      .esitc-intro-actions { flex-direction: column; }
      .esitc-intro-actions a { text-align: center; justify-content: center; }
      .cta-buttons { flex-direction: column; align-items: center; }
      .footer-grid { grid-template-columns: 1fr; }
    }