* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --mint-50: #f2faf7;
      --mint-100: #e0f5ed;
      --mint-200: #c2eadb;
      --mint-300: #8dd7bd;
      --mint-400: #4fbe9c;
      --mint-500: #2da583;
      --mint-600: #218a6c;
      --mint-700: #1c7058;
      --ink-900: #11251f;
      --ink-800: #1c332c;
      --ink-700: #2a443c;
      --ink-600: #3d5a50;
      --ink-500: #58756a;
      --gray-100: #f4f7f5;
      --gray-200: #e7eeeb;
      --gray-300: #d3ded9;
      --white: #ffffff;
      --shadow-sm: 0 1px 3px rgba(17,37,31,0.06);
      --shadow-md: 0 4px 16px rgba(17,37,31,0.08);
      --shadow-lg: 0 8px 32px rgba(17,37,31,0.10);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font);
      background-color: var(--mint-50);
      background-image: linear-gradient(180deg, var(--mint-50) 0%, var(--gray-100) 45%, var(--mint-50) 100%);
      color: var(--ink-800);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* ---------- header ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--mint-200);
      transition: box-shadow 0.3s;
    }
    .site-header.scrolled {
      box-shadow: var(--shadow-md);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 66px;
      gap: 12px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-logo {
      width: 40px;
      height: 40px;
      object-fit: contain;
      border-radius: 8px;
    }
    .brand-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--ink-900);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 12px;
      font-size: 14px;
      color: var(--ink-600);
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--mint-600);
      background: var(--mint-100);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 999px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      font-family: var(--font);
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--mint-500), var(--mint-600));
      color: var(--white);
      box-shadow: 0 4px 14px rgba(45,165,131,0.30);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--mint-400), var(--mint-500));
      box-shadow: 0 6px 20px rgba(45,165,131,0.40);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: var(--white);
      color: var(--mint-700);
      border-color: var(--mint-300);
    }
    .btn-outline:hover {
      background: var(--mint-100);
      border-color: var(--mint-400);
    }
    .btn-lg {
      padding: 14px 32px;
      font-size: 16px;
    }
    .btn-block {
      width: 100%;
    }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
    }
    .mobile-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--ink-700);
      border-radius: 2px;
      transition: 0.3s;
    }
    /* ---------- hero ---------- */
    .hero {
      position: relative;
      padding: 80px 0 70px;
      background: radial-gradient(circle at 20% 20%, rgba(141,215,189,0.35), transparent 55%),
                  radial-gradient(circle at 80% 10%, rgba(79,190,156,0.20), transparent 50%),
                  linear-gradient(160deg, #eafaf4 0%, #f6fbf9 60%, #eef8f3 100%);
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      border: 1px solid rgba(79,190,156,0.20);
      top: -160px;
      right: -100px;
      animation: floatOrb 14s ease-in-out infinite;
      pointer-events: none;
    }
    .hero::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(45,165,131,0.10), transparent 70%);
      bottom: -80px;
      left: 5%;
      animation: floatOrb 18s ease-in-out infinite reverse;
      pointer-events: none;
    }
    @keyframes floatOrb {
      0%, 100% { transform: translate(0, 0) scale(1); }
      50% { transform: translate(-20px, 24px) scale(1.05); }
    }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--white);
      border: 1px solid var(--mint-200);
      color: var(--mint-700);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 22px;
      box-shadow: var(--shadow-sm);
    }
    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--mint-500);
      animation: pulseDot 2s infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.3); }
    }
    .hero h1 {
      font-size: 44px;
      line-height: 1.22;
      font-weight: 800;
      color: var(--ink-900);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero h1 .highlight {
      color: var(--mint-600);
      position: relative;
      display: inline-block;
    }
    .hero h1 .highlight::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 2px;
      height: 8px;
      background: rgba(141,215,189,0.45);
      border-radius: 4px;
      z-index: -1;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--ink-600);
      margin-bottom: 32px;
      max-width: 560px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .hero-stat {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 16px 14px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .hero-stat:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .hero-stat strong {
      display: block;
      font-size: 24px;
      font-weight: 800;
      color: var(--mint-600);
      line-height: 1.2;
    }
    .hero-stat span {
      font-size: 13px;
      color: var(--ink-500);
    }
    .hero-visual {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .visual-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 22px 24px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(194,234,219,0.5);
      transition: transform 0.3s;
    }
    .visual-card:hover {
      transform: translateY(-4px);
    }
    .visual-card .vc-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--mint-600);
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .visual-card .vc-line {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 15px;
      color: var(--ink-700);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .visual-card .vc-line .tag {
      font-size: 12px;
      font-weight: 600;
      background: var(--mint-100);
      color: var(--mint-700);
      padding: 2px 10px;
      border-radius: 999px;
    }
    .visual-card .vc-desc {
      font-size: 13px;
      color: var(--ink-500);
    }
    .visual-card.dark {
      background: linear-gradient(135deg, var(--mint-600), var(--mint-700));
      border: none;
      color: var(--white);
    }
    .visual-card.dark .vc-title { color: var(--mint-200); }
    .visual-card.dark .vc-line { color: var(--white); }
    .visual-card.dark .vc-line .tag {
      background: rgba(255,255,255,0.18);
      color: var(--white);
    }
    .visual-card.dark .vc-desc { color: rgba(255,255,255,0.80); }
    /* ---------- section shared ---------- */
    section {
      padding: 72px 0;
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-kicker {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      color: var(--mint-600);
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--ink-900);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-head p {
      font-size: 15px;
      color: var(--ink-500);
    }
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* ---------- about / platform ---------- */
    .about-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }
    .about-text h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 16px;
    }
    .about-text p {
      font-size: 15px;
      color: var(--ink-600);
      margin-bottom: 14px;
    }
    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }
    .about-feature {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-sm);
      padding: 14px;
      transition: border-color 0.25s, box-shadow 0.25s;
    }
    .about-feature:hover {
      border-color: var(--mint-400);
      box-shadow: var(--shadow-sm);
    }
    .about-feature .icon {
      width: 30px;
      height: 30px;
      border-radius: 8px;
      background: var(--mint-100);
      color: var(--mint-700);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .about-feature strong {
      display: block;
      font-size: 14px;
      color: var(--ink-900);
      margin-bottom: 2px;
    }
    .about-feature span {
      font-size: 12px;
      color: var(--ink-500);
      line-height: 1.5;
    }
    .about-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .side-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .side-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .side-card h4::before {
      content: "";
      width: 4px;
      height: 16px;
      border-radius: 2px;
      background: var(--mint-500);
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .tag-cloud span {
      font-size: 12px;
      font-weight: 500;
      color: var(--mint-700);
      background: var(--mint-100);
      padding: 5px 12px;
      border-radius: 999px;
      transition: background 0.2s, color 0.2s;
    }
    .tag-cloud span:hover {
      background: var(--mint-500);
      color: var(--white);
    }
    .price-ref {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .price-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      background: var(--gray-100);
      color: var(--ink-700);
    }
    .price-row strong {
      color: var(--mint-600);
      font-weight: 700;
    }
    /* ---------- capabilities ---------- */
    .capability-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .capability-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      transition: transform 0.28s, box-shadow 0.28s, border-color 0.28s;
      position: relative;
      overflow: hidden;
    }
    .capability-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--mint-400), var(--mint-600));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.35s ease;
    }
    .capability-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: var(--mint-300);
    }
    .capability-card:hover::before {
      transform: scaleX(1);
    }
    .capability-icon {
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--mint-100), var(--mint-200));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: var(--mint-700);
      margin-bottom: 16px;
    }
    .capability-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 8px;
    }
    .capability-card p {
      font-size: 13.5px;
      color: var(--ink-500);
      line-height: 1.6;
    }
    /* ---------- process ---------- */
    .process-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }
    .process-step {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      position: relative;
      transition: transform 0.28s, box-shadow 0.28s;
    }
    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .process-step .step-num {
      font-size: 34px;
      font-weight: 800;
      color: var(--mint-200);
      line-height: 1;
      margin-bottom: 12px;
    }
    .process-step h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 8px;
    }
    .process-step p {
      font-size: 13px;
      color: var(--ink-500);
      line-height: 1.6;
    }
    /* ---------- cases ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 24px;
    }
    .case-main {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: box-shadow 0.3s;
    }
    .case-main:hover {
      box-shadow: var(--shadow-lg);
    }
    .case-main .img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--mint-100);
      overflow: hidden;
    }
    .case-main .img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-main:hover .img-wrap img {
      transform: scale(1.04);
    }
    .case-main .case-body {
      padding: 22px 24px;
    }
    .case-main .case-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 8px;
    }
    .case-main .case-body p {
      font-size: 14px;
      color: var(--ink-500);
    }
    .case-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .case-side-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      align-items: stretch;
      transition: box-shadow 0.3s;
    }
    .case-side-card:hover {
      box-shadow: var(--shadow-md);
    }
    .case-side-card .side-img {
      width: 42%;
      flex-shrink: 0;
      background: var(--mint-100);
      overflow: hidden;
    }
    .case-side-card .side-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-side-card:hover .side-img img {
      transform: scale(1.05);
    }
    .case-side-card .side-info {
      padding: 16px 18px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-side-card .side-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 4px;
    }
    .case-side-card .side-info span {
      font-size: 12.5px;
      color: var(--ink-500);
    }
    /* ---------- comparison ---------- */
    .compare-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .compare-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 28px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--mint-200);
    }
    .compare-top h3 {
      font-size: 22px;
      font-weight: 800;
      color: var(--ink-900);
    }
    .rating-block {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .rating-score {
      font-size: 42px;
      font-weight: 800;
      color: var(--mint-600);
      line-height: 1;
    }
    .rating-meta {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .stars {
      color: #f5a623;
      font-size: 16px;
      letter-spacing: 2px;
    }
    .rating-meta span {
      font-size: 13px;
      color: var(--ink-500);
    }
    .table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      min-width: 640px;
    }
    .compare-table thead th {
      background: var(--mint-100);
      color: var(--ink-900);
      font-weight: 700;
      padding: 14px 16px;
      text-align: left;
      border-bottom: 2px solid var(--mint-300);
      white-space: nowrap;
    }
    .compare-table thead th:first-child {
      border-radius: 10px 0 0 0;
    }
    .compare-table thead th:last-child {
      border-radius: 0 10px 0 0;
    }
    .compare-table tbody td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--gray-200);
      color: var(--ink-600);
      vertical-align: top;
    }
    .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(--ink-800);
    }
    .compare-table .highlight-cell {
      color: var(--mint-700);
      font-weight: 600;
      background: rgba(224,245,237,0.5);
    }
    /* ---------- reviews ---------- */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform 0.28s, box-shadow 0.28s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #f5a623;
      font-size: 14px;
      letter-spacing: 2px;
    }
    .review-card p {
      font-size: 14px;
      color: var(--ink-600);
      line-height: 1.7;
      flex-grow: 1;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 10px;
      padding-top: 12px;
      border-top: 1px solid var(--gray-200);
    }
    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--mint-300), var(--mint-500));
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .review-user strong {
      display: block;
      font-size: 14px;
      color: var(--ink-900);
    }
    .review-user span {
      font-size: 12px;
      color: var(--ink-500);
    }
    /* ---------- form ---------- */
    .form-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 40px;
      align-items: start;
    }
    .form-info h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--ink-900);
      margin-bottom: 14px;
    }
    .form-info p {
      font-size: 15px;
      color: var(--ink-600);
      margin-bottom: 24px;
    }
    .contact-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--ink-700);
    }
    .contact-item .c-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--mint-100);
      color: var(--mint-700);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
    }
    .contact-item a {
      color: var(--mint-600);
      font-weight: 600;
    }
    .contact-item a:hover {
      text-decoration: underline;
    }
    .form-card {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: 1 / -1;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--ink-700);
    }
    .form-group label .req {
      color: #e05252;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 11px 14px;
      font-size: 14px;
      font-family: var(--font);
      color: var(--ink-800);
      background: var(--gray-100);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
      -webkit-appearance: none;
      appearance: none;
    }
    .form-group select {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2358756a' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 14px center;
      padding-right: 36px;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      background: var(--white);
      border-color: var(--mint-400);
      box-shadow: 0 0 0 3px rgba(79,190,156,0.15);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 96px;
    }
    /* ---------- faq ---------- */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: box-shadow 0.25s, border-color 0.25s;
    }
    .faq-item:hover {
      border-color: var(--mint-300);
    }
    .faq-item.open {
      box-shadow: var(--shadow-md);
      border-color: var(--mint-400);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      background: none;
      border: none;
      font-family: var(--font);
      font-size: 15px;
      font-weight: 600;
      color: var(--ink-900);
      text-align: left;
      cursor: pointer;
      transition: color 0.2s;
    }
    .faq-question:hover {
      color: var(--mint-600);
    }
    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--mint-100);
      color: var(--mint-700);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 700;
      flex-shrink: 0;
      transition: transform 0.3s, background 0.3s;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--mint-500);
      color: var(--white);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 400px;
    }
    .faq-answer-inner {
      padding: 0 22px 20px;
      font-size: 14px;
      color: var(--ink-600);
      line-height: 1.7;
    }
    /* ---------- articles ---------- */
    .article-links {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
    }
    .article-link {
      display: flex;
      flex-direction: column;
      gap: 8px;
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    }
    .article-link:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-400);
    }
    .article-link .a-num {
      font-size: 12px;
      font-weight: 700;
      color: var(--mint-500);
      letter-spacing: 1px;
    }
    .article-link strong {
      font-size: 14px;
      color: var(--ink-900);
      font-weight: 600;
      line-height: 1.5;
    }
    .article-link span {
      font-size: 12px;
      color: var(--ink-500);
    }
    /* ---------- footer ---------- */
    .site-footer {
      background: var(--ink-900);
      color: #c8dbd4;
      padding: 56px 0 28px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand .brand {
      margin-bottom: 16px;
    }
    .footer-brand .brand-text {
      color: var(--white);
    }
    .footer-brand p {
      font-size: 13.5px;
      color: #9fbcb2;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-social {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .footer-social span {
      font-size: 12px;
      color: #c8dbd4;
      background: rgba(255,255,255,0.08);
      padding: 5px 12px;
      border-radius: 999px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      font-size: 13.5px;
      color: #9fbcb2;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: var(--mint-300);
    }
    .footer-contact li {
      font-size: 13.5px;
      color: #9fbcb2;
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }
    .footer-contact li strong {
      color: #c8dbd4;
      font-weight: 600;
    }
    .footer-qr {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }
    .footer-qr img {
      width: 72px;
      height: 72px;
      object-fit: contain;
      border-radius: 8px;
      background: var(--white);
      padding: 4px;
    }
    .footer-qr span {
      font-size: 12px;
      color: #9fbcb2;
      line-height: 1.6;
    }
    .footer-friend {
      border-top: 1px solid rgba(255,255,255,0.10);
      padding-top: 22px;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px 20px;
    }
    .footer-friend .fl-title {
      font-size: 13px;
      font-weight: 700;
      color: #c8dbd4;
    }
    .footer-friend a {
      font-size: 13px;
      color: #9fbcb2;
      transition: color 0.2s;
    }
    .footer-friend a:hover {
      color: var(--mint-300);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.10);
      padding-top: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 12.5px;
      color: #7f9d93;
    }
    .footer-bottom a {
      color: #9fbcb2;
    }
    .footer-bottom a:hover {
      color: var(--mint-300);
    }
    /* ---------- floating ---------- */
    .back-top {
      position: fixed;
      right: 20px;
      bottom: 96px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--white);
      border: 1px solid var(--mint-300);
      color: var(--mint-700);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      cursor: pointer;
      box-shadow: var(--shadow-md);
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: all 0.3s;
      z-index: 90;
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .back-top:hover {
      background: var(--mint-500);
      color: var(--white);
      border-color: var(--mint-500);
    }
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 36px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--mint-500), var(--mint-600));
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(45,165,131,0.45);
      z-index: 95;
      transition: transform 0.25s;
    }
    .float-service:hover {
      transform: scale(1.08);
    }
    .service-pop {
      position: fixed;
      right: 76px;
      bottom: 36px;
      width: 240px;
      background: var(--white);
      border: 1px solid var(--mint-200);
      border-radius: var(--radius-md);
      padding: 18px;
      box-shadow: var(--shadow-lg);
      z-index: 94;
      opacity: 0;
      visibility: hidden;
      transform: translateX(10px);
      transition: all 0.3s;
    }
    .service-pop.show {
      opacity: 1;
      visibility: visible;
      transform: translateX(0);
    }
    .service-pop h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 10px;
    }
    .service-pop img {
      width: 100%;
      max-width: 170px;
      margin: 0 auto 10px;
      border-radius: 8px;
    }
    .service-pop p {
      font-size: 12px;
      color: var(--ink-500);
      text-align: center;
      line-height: 1.6;
    }
    /* ---------- responsive ---------- */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 36px; }
      .hero-grid { gap: 32px; }
      .capability-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .article-links { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .process-wrap { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 880px) {
      .nav-links {
        position: fixed;
        top: 66px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: stretch;
        padding: 12px 20px 20px;
        border-bottom: 1px solid var(--mint-200);
        box-shadow: var(--shadow-md);
        max-height: calc(100vh - 66px);
        overflow-y: auto;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: all 0.3s;
      }
      .nav-links.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
      }
      .nav-links a {
        padding: 11px 12px;
        font-size: 15px;
        border-bottom: 1px solid var(--gray-200);
        border-radius: 0;
      }
      .nav-links a:last-child {
        border-bottom: none;
      }
      .mobile-toggle {
        display: flex;
      }
      .nav-cta .btn {
        display: none;
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-visual {
        max-width: 480px;
        margin: 0 auto;
        width: 100%;
      }
      .hero h1 { font-size: 32px; }
      .about-wrap { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .case-side { flex-direction: row; flex-wrap: wrap; }
      .case-side-card { flex: 1 1 46%; }
      .form-grid { grid-template-columns: 1fr; }
      .compare-card { padding: 24px; }
    }
    @media (max-width: 640px) {
      section { padding: 52px 0; }
      .hero { padding: 52px 0 48px; }
      .hero h1 { font-size: 27px; }
      .hero-desc { font-size: 15px; }
      .hero-stats { gap: 10px; }
      .hero-stat { padding: 12px 8px; }
      .hero-stat strong { font-size: 19px; }
      .hero-stat span { font-size: 11px; }
      .section-head h2 { font-size: 24px; }
      .capability-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .article-links { grid-template-columns: repeat(2, 1fr); }
      .process-wrap { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .about-features { grid-template-columns: 1fr; }
      .case-side { flex-direction: column; }
      .case-side-card { flex: 1 1 auto; }
      .compare-top { flex-direction: column; align-items: flex-start; }
      .form-row { grid-template-columns: 1fr; }
      .form-card { padding: 22px; }
      .hero-actions .btn { flex: 1 1 100%; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
      .article-links { grid-template-columns: 1fr 1fr; }
    }
    @media (prefers-reduced-motion: reduce) {
      * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }