* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --mint-50: #f0fbf7;
      --mint-100: #d9f5eb;
      --mint-200: #b3ebd8;
      --mint-300: #7edbc0;
      --mint-400: #45c9a5;
      --mint-500: #1fb389;
      --mint-600: #149673;
      --mint-700: #117a5f;
      --mint-800: #0e624d;
      --mint-900: #0a4a3a;
      --grey-50: #f8fafb;
      --grey-100: #f0f3f4;
      --grey-200: #e1e8ea;
      --grey-600: #5f6b6d;
      --grey-700: #3f4a4c;
      --grey-800: #2a3235;
      --grey-900: #1a2224;
      --white: #ffffff;
      --shadow-sm: 0 2px 8px rgba(14, 98, 77, 0.06);
      --shadow-md: 0 6px 20px rgba(14, 98, 77, 0.09);
      --shadow-lg: 0 16px 40px rgba(14, 98, 77, 0.12);
      --radius-md: 14px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --transition: 0.25s ease;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background: linear-gradient(180deg, var(--mint-50) 0%, #f7fcf9 30%, var(--grey-50) 100%);
      color: var(--grey-800);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    a:hover {
      color: var(--mint-600);
    }

    ul {
      list-style: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* ---------- Header / Nav ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.86);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(30, 179, 137, 0.12);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .brand .ai-page-logo {
      height: 34px;
      width: auto;
    }

    .brand-name {
      font-family: var(--font-heading);
      font-size: 20px;
      font-weight: 700;
      color: var(--mint-800);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: nowrap;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }

    .nav-links::-webkit-scrollbar {
      display: none;
    }

    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--grey-700);
      white-space: nowrap;
      border-radius: 8px;
      transition: background var(--transition), color var(--transition);
    }

    .nav-links a:hover {
      background: var(--mint-50);
      color: var(--mint-700);
    }

    .nav-cta {
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px 22px;
      font-family: var(--font-body);
      font-size: 14px;
      font-weight: 600;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--mint-500), var(--mint-600));
      color: var(--white);
      box-shadow: 0 4px 14px rgba(31, 179, 137, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(31, 179, 137, 0.42);
      color: var(--white);
    }

    .btn-outline {
      background: transparent;
      color: var(--mint-700);
      border: 1.5px solid var(--mint-400);
    }

    .btn-outline:hover {
      background: var(--mint-50);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      width: 40px;
      height: 40px;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border-radius: 8px;
      color: var(--mint-800);
    }

    .menu-toggle:hover {
      background: var(--mint-50);
    }

    .menu-toggle svg {
      width: 24px;
      height: 24px;
    }

    /* ---------- Hero ---------- */
    .hero {
      position: relative;
      padding: 80px 0 72px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(69, 201, 165, 0.14) 0%, transparent 70%);
      top: -180px;
      right: -120px;
      pointer-events: none;
    }

    .hero::after {
      content: "";
      position: absolute;
      width: 380px;
      height: 380px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(31, 179, 137, 0.09) 0%, transparent 70%);
      bottom: -160px;
      left: -80px;
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 820px;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px 6px 10px;
      background: var(--mint-100);
      color: var(--mint-800);
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 22px;
      animation: fadeUp 0.6s ease both;
    }

    .hero-tag .dot {
      width: 8px;
      height: 8px;
      background: var(--mint-500);
      border-radius: 50%;
      animation: pulse 2s ease infinite;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-size: clamp(30px, 4.6vw, 46px);
      line-height: 1.28;
      font-weight: 800;
      color: var(--mint-900);
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      animation: fadeUp 0.6s 0.08s ease both;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--mint-600);
      background: linear-gradient(120deg, var(--mint-500), var(--mint-700));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--grey-600);
      line-height: 1.75;
      max-width: 640px;
      margin-bottom: 30px;
      animation: fadeUp 0.6s 0.16s ease both;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      animation: fadeUp 0.6s 0.24s ease both;
    }

    .hero-actions .btn {
      padding: 14px 30px;
      font-size: 15px;
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 14px 40px;
      margin-top: 48px;
      padding-top: 30px;
      border-top: 1px solid var(--mint-200);
      max-width: 640px;
      animation: fadeUp 0.6s 0.32s ease both;
    }

    .hero-stat {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .hero-stat strong {
      font-family: var(--font-heading);
      font-size: 26px;
      font-weight: 800;
      color: var(--mint-700);
      line-height: 1.2;
    }

    .hero-stat span {
      font-size: 13px;
      color: var(--grey-600);
    }

    /* ---------- Section common ---------- */
    section {
      padding: 64px 0;
      position: relative;
    }

    .section-head {
      max-width: 700px;
      margin-bottom: 42px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--mint-600);
      margin-bottom: 12px;
    }

    .section-head h2 {
      font-family: var(--font-heading);
      font-size: clamp(24px, 3.2vw, 34px);
      font-weight: 800;
      color: var(--grey-900);
      line-height: 1.3;
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }

    .section-head p {
      font-size: 15.5px;
      color: var(--grey-600);
      line-height: 1.75;
    }

    /* ---------- About ---------- */
    .about-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: start;
    }

    .about-text p {
      font-size: 15.5px;
      color: var(--grey-600);
      line-height: 1.8;
      margin-bottom: 16px;
    }

    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }

    .about-feature {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      background: var(--white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      font-size: 14px;
      font-weight: 500;
      color: var(--grey-700);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .about-feature:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .about-feature .ico {
      flex-shrink: 0;
      width: 30px;
      height: 30px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--mint-100);
      border-radius: 8px;
      color: var(--mint-700);
      font-size: 15px;
    }

    .about-banner {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--mint-100);
    }

    .banner-img-group {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .banner-img-group img {
      width: 100%;
      border-radius: 12px;
      object-fit: cover;
      aspect-ratio: 16 / 9;
      box-shadow: var(--shadow-sm);
    }

    /* ---------- Data cards ---------- */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .data-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .data-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .data-card .num {
      font-family: var(--font-heading);
      font-size: 32px;
      font-weight: 800;
      color: var(--mint-600);
      line-height: 1.2;
      display: block;
    }

    .data-card .label {
      font-size: 14px;
      color: var(--grey-600);
      margin-top: 4px;
      display: block;
    }

    /* ---------- Services ---------- */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 20px;
    }

    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-300);
    }

    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--mint-100), var(--mint-50));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--mint-700);
      margin-bottom: 4px;
    }

    .service-card h3 {
      font-family: var(--font-heading);
      font-size: 17px;
      font-weight: 700;
      color: var(--grey-900);
    }

    .service-card p {
      font-size: 14px;
      color: var(--grey-600);
      line-height: 1.7;
    }

    /* ---------- Process ---------- */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }

    .process-step {
      position: relative;
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 30px 22px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .process-step::before {
      counter-increment: step;
      content: "0" counter(step);
      font-family: var(--font-heading);
      font-size: 28px;
      font-weight: 800;
      color: var(--mint-200);
      line-height: 1;
      display: block;
      margin-bottom: 12px;
    }

    .process-step h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--grey-900);
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 13.5px;
      color: var(--grey-600);
      line-height: 1.7;
    }

    /* ---------- Compare ---------- */
    .compare-wrap {
      display: grid;
      grid-template-columns: 1.35fr 0.65fr;
      gap: 28px;
      align-items: start;
    }

    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      background: var(--white);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      min-width: 540px;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 18px;
      text-align: left;
      border-bottom: 1px solid var(--grey-100);
      vertical-align: middle;
    }

    .compare-table thead th {
      background: var(--mint-50);
      color: var(--mint-800);
      font-weight: 700;
      font-size: 13.5px;
      white-space: nowrap;
    }

    .compare-table tbody tr:last-child td {
      border-bottom: none;
    }

    .compare-table tbody tr:hover {
      background: var(--mint-50);
    }

    .compare-table td:first-child {
      font-weight: 600;
      color: var(--grey-800);
      white-space: nowrap;
    }

    .compare-table .good {
      color: var(--mint-700);
      font-weight: 600;
    }

    .score-card {
      background: linear-gradient(160deg, var(--mint-700), var(--mint-800));
      border-radius: var(--radius-lg);
      padding: 34px 28px;
      color: var(--white);
      text-align: center;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }

    .score-card::after {
      content: "";
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      top: -80px;
      right: -60px;
      pointer-events: none;
    }

    .score-card .stars {
      font-size: 22px;
      letter-spacing: 4px;
      color: #ffe082;
      margin-bottom: 12px;
    }

    .score-card .score-num {
      font-family: var(--font-heading);
      font-size: 64px;
      font-weight: 800;
      line-height: 1;
      color: var(--white);
    }

    .score-card .score-num small {
      font-size: 22px;
      font-weight: 500;
      color: var(--mint-200);
    }

    .score-card .score-label {
      display: block;
      margin-top: 8px;
      font-size: 14px;
      color: var(--mint-200);
      letter-spacing: 1px;
    }

    .score-card .score-tag {
      display: inline-block;
      margin-top: 18px;
      padding: 8px 20px;
      background: rgba(255, 255, 255, 0.16);
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
    }

    /* ---------- Reviews ---------- */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .review-stars {
      color: #f5b93d;
      font-size: 15px;
      letter-spacing: 2px;
    }

    .review-text {
      font-size: 14px;
      color: var(--grey-700);
      line-height: 1.75;
      flex: 1;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 12px;
      border-top: 1px solid var(--grey-100);
    }

    .review-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--mint-100);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 700;
      color: var(--mint-700);
      flex-shrink: 0;
    }

    .review-author strong {
      display: block;
      font-size: 14px;
      color: var(--grey-900);
    }

    .review-author span {
      font-size: 12px;
      color: var(--grey-600);
    }

    /* ---------- Cases ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .case-card {
      background: var(--white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      flex-direction: column;
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .case-thumb {
      aspect-ratio: 16 / 10;
      background: var(--mint-50);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body {
      padding: 18px 20px 22px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }

    .case-body .case-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--mint-600);
      letter-spacing: 0.5px;
    }

    .case-body h3 {
      font-family: var(--font-heading);
      font-size: 16px;
      font-weight: 700;
      color: var(--grey-900);
    }

    .case-body p {
      font-size: 13.5px;
      color: var(--grey-600);
      line-height: 1.7;
    }

    /* ---------- Token & Price ---------- */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .token-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .token-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .token-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--grey-900);
      margin-bottom: 10px;
    }

    .token-card .price {
      font-family: var(--font-heading);
      font-size: 26px;
      font-weight: 800;
      color: var(--mint-600);
      margin-bottom: 10px;
    }

    .token-card .price span {
      font-size: 13px;
      font-weight: 500;
      color: var(--grey-600);
    }

    .token-card ul {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .token-card li {
      font-size: 13.5px;
      color: var(--grey-600);
      padding-left: 16px;
      position: relative;
      line-height: 1.6;
    }

    .token-card li::before {
      content: "·";
      position: absolute;
      left: 0;
      color: var(--mint-500);
      font-weight: 700;
    }

    /* ---------- FAQ ---------- */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 880px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-100);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: border-color var(--transition);
    }

    .faq-item.active {
      border-color: var(--mint-300);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      background: none;
      border: none;
      cursor: pointer;
      font-family: var(--font-body);
      font-size: 15px;
      font-weight: 600;
      color: var(--grey-900);
      text-align: left;
      transition: color var(--transition);
    }

    .faq-question:hover {
      color: var(--mint-700);
    }

    .faq-question .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: var(--mint-50);
      color: var(--mint-600);
      font-size: 16px;
      transition: transform var(--transition), background var(--transition);
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: var(--mint-100);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 22px;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 22px 18px;
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--grey-600);
      line-height: 1.75;
    }

    /* ---------- Articles ---------- */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px 22px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .article-date {
      font-size: 12.5px;
      color: var(--mint-600);
      font-weight: 600;
      letter-spacing: 0.5px;
    }

    .article-card h3 {
      font-family: var(--font-heading);
      font-size: 16px;
      font-weight: 700;
      color: var(--grey-900);
      line-height: 1.5;
    }

    .article-card p {
      font-size: 13.5px;
      color: var(--grey-600);
      line-height: 1.7;
      flex: 1;
    }

    .article-link {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--mint-600);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 4px;
    }

    .article-link:hover {
      color: var(--mint-800);
    }

    /* ---------- Form ---------- */
    .form-section {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 44px 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--mint-100);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-field {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-field.full {
      grid-column: 1 / -1;
    }

    .form-field label {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--grey-800);
    }

    .form-field input,
    .form-field select,
    .form-field textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid var(--grey-200);
      border-radius: 10px;
      font-family: var(--font-body);
      font-size: 14px;
      color: var(--grey-800);
      background: var(--grey-50);
      transition: border-color var(--transition), box-shadow var(--transition);
    }

    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
      outline: none;
      border-color: var(--mint-400);
      box-shadow: 0 0 0 3px rgba(69, 201, 165, 0.16);
      background: var(--white);
    }

    .form-field textarea {
      resize: vertical;
      min-height: 110px;
    }

    .form-submit {
      grid-column: 1 / -1;
      display: flex;
      justify-content: flex-start;
    }

    .form-submit .btn {
      padding: 13px 40px;
      font-size: 15px;
    }

    /* ---------- Contact / Footer ---------- */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: start;
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px 18px;
      background: var(--white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .contact-item:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .contact-item .c-ico {
      flex-shrink: 0;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--mint-100);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--mint-700);
      font-size: 16px;
    }

    .contact-item .c-info strong {
      display: block;
      font-size: 14px;
      color: var(--grey-900);
      margin-bottom: 2px;
    }

    .contact-item .c-info span {
      font-size: 13.5px;
      color: var(--grey-600);
      word-break: break-all;
    }

    .contact-qr {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-100);
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .contact-qr img {
      width: 180px;
      height: 180px;
      object-fit: contain;
      border-radius: 12px;
    }

    .contact-qr span {
      font-size: 13.5px;
      color: var(--grey-600);
    }

    .site-footer {
      background: var(--mint-900);
      color: var(--mint-100);
      padding: 52px 0 24px;
      margin-top: 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-brand .ai-page-logo {
      height: 32px;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 13.5px;
      color: var(--mint-200);
      line-height: 1.75;
      max-width: 300px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col li a {
      font-size: 13.5px;
      color: var(--mint-200);
      transition: color var(--transition);
    }

    .footer-col li a:hover {
      color: var(--white);
    }

    .footer-links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 28px;
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-links-cloud a {
      font-size: 12.5px;
      color: var(--mint-200);
      padding: 5px 12px;
      background: rgba(255, 255, 255, 0.06);
      border-radius: 50px;
      transition: background var(--transition), color var(--transition);
    }

    .footer-links-cloud a:hover {
      background: rgba(255, 255, 255, 0.14);
      color: var(--white);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      font-size: 12.5px;
      color: var(--mint-300);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 8px;
    }

    .footer-bottom a {
      color: var(--mint-200);
    }

    .footer-bottom a:hover {
      color: var(--white);
    }

    /* ---------- Floating buttons ---------- */
    .float-btns {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 900;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--shadow-md);
      transition: transform var(--transition), box-shadow var(--transition);
      font-size: 18px;
    }

    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-lg);
    }

    .float-btn.service {
      background: var(--mint-500);
      color: var(--white);
      font-size: 20px;
    }

    .float-btn.top {
      background: var(--white);
      color: var(--mint-700);
      border: 1px solid var(--mint-200);
      opacity: 0;
      visibility: hidden;
      transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    }

    .float-btn.top.show {
      opacity: 1;
      visibility: visible;
    }

    /* ---------- Animations ---------- */
    @keyframes fadeUp {
      from {
        opacity: 0;
        transform: translateY(24px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes pulse {
      0%,
      100% {
        opacity: 1;
        transform: scale(1);
      }
      50% {
        opacity: 0.5;
        transform: scale(1.3);
      }
    }

    .reveal {
      opacity: 0;
      transform: translateY(26px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 992px) {
      .about-grid,
      .compare-wrap,
      .contact-grid {
        grid-template-columns: 1fr;
      }

      .data-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }

      .review-grid,
      .case-grid,
      .article-grid,
      .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: stretch;
        padding: 12px 24px 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--mint-100);
        gap: 4px;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        padding: 10px 12px;
      }

      .menu-toggle {
        display: flex;
      }
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 16px;
      }

      section {
        padding: 48px 0;
      }

      .hero {
        padding: 56px 0 48px;
      }

      .hero-desc {
        font-size: 15px;
      }

      .hero-actions .btn {
        padding: 12px 24px;
        font-size: 14px;
      }

      .hero-stats {
        gap: 16px 28px;
      }

      .hero-stat strong {
        font-size: 22px;
      }

      .data-grid,
      .process-steps,
      .review-grid,
      .case-grid,
      .article-grid,
      .token-grid,
      .about-features,
      .form-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .form-section {
        padding: 28px 20px;
      }

      .compare-table th,
      .compare-table td {
        padding: 10px 12px;
        font-size: 13px;
      }

      .nav-cta .btn {
        padding: 8px 16px;
        font-size: 13px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }