*,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
    -webkit-text-size-adjust: 100%;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: #161326;
    background-color: #fbf8ff;
    background-image:
      radial-gradient(760px 460px at 6% -6%, rgba(255, 61, 127, 0.16), transparent 60%),
      radial-gradient(700px 440px at 98% 2%, rgba(123, 61, 255, 0.15), transparent 62%),
      radial-gradient(820px 520px at 50% 104%, rgba(0, 201, 192, 0.12), transparent 64%),
      linear-gradient(180deg, #fff7fb 0%, #f6f4ff 48%, #fdf9ff 100%);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  a {
    color: #4a3fa8;
  }

  /* ---------- header ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(22, 19, 38, 0.07);
  }

  .nav-bar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 70px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    text-decoration: none;
    color: #161326;
  }

  .ai-page-logo {
    display: block;
    max-height: 38px;
    width: auto;
    max-width: 100%;
  }

  .brand-text {
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .nav-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 auto;
    gap: 0;
    flex-wrap: nowrap;
  }

  .nav-links a {
    display: inline-block;
    padding: 8px 9px;
    font-size: 14px;
    font-weight: 600;
    color: #3d3757;
    text-decoration: none;
    border-radius: 10px;
    white-space: nowrap;
    transition: color 0.2s ease, background 0.2s ease;
  }

  .nav-links a:hover {
    color: #161326;
    background: rgba(255, 61, 127, 0.1);
  }

  .nav-cta {
    flex: 0 0 auto;
    padding: 9px 18px;
    font-size: 14px;
  }

  .nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 40px;
    padding: 0 10px;
    background: #fff;
    border: 1px solid rgba(22, 19, 38, 0.12);
    border-radius: 11px;
    cursor: pointer;
  }

  .nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: #3d3757;
  }

  /* ---------- buttons ---------- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.22s ease, box-shadow 0.28s ease, border-color 0.22s ease, color 0.22s ease;
  }

  .btn-primary {
    color: #ffffff;
    background: linear-gradient(120deg, #ff3d7f 0%, #7b3dff 62%, #6d5bff 100%);
    box-shadow: 0 14px 28px -14px rgba(123, 61, 255, 0.8);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 34px -14px rgba(123, 61, 255, 0.9);
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-ghost {
    color: #161326;
    background: #ffffff;
    border-color: rgba(22, 19, 38, 0.14);
    box-shadow: 0 10px 22px -18px rgba(22, 19, 38, 0.6);
  }

  .btn-ghost:hover {
    transform: translateY(-2px);
    color: #c9235f;
    border-color: rgba(255, 61, 127, 0.5);
  }

  .btn-lg {
    padding: 14px 30px;
    font-size: 16px;
  }

  .btn-block {
    width: 100%;
  }

  /* ---------- hero ---------- */
  .hero {
    padding: 62px 0 46px;
    position: relative;
  }

  .hero-inner {
    position: relative;
    z-index: 1;
  }

  .eyebrow {
    display: inline-block;
    margin: 0 0 20px;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: #a3174f;
    background: rgba(255, 61, 127, 0.1);
    border: 1px solid rgba(255, 61, 127, 0.22);
    border-radius: 999px;
  }

  .hero h1 {
    margin: 0 0 18px;
    font-size: clamp(28px, 4.4vw, 50px);
    line-height: 1.24;
    font-weight: 900;
    letter-spacing: -0.01em;
    color: #14112b;
  }

  .hero h1 .hl {
    color: #7b3dff;
    position: relative;
    display: inline-block;
  }

  .hero h1 .hl::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 8px;
    border-radius: 6px;
    background: linear-gradient(90deg, rgba(255, 61, 127, 0.32), rgba(123, 61, 255, 0.28));
    z-index: -1;
  }

  .hero-lead {
    max-width: 780px;
    margin: 0 0 28px;
    font-size: clamp(15px, 1.6vw, 17px);
    color: #4b4566;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-bottom: 26px;
  }

  .hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    margin: 0 0 30px;
    padding: 0;
    list-style: none;
  }

  .hero-points li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #3d3757;
  }

  .hero-points li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff3d7f, #7b3dff);
  }

  .model-cloud {
    padding: 20px 22px;
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid rgba(22, 19, 38, 0.08);
    border-radius: 20px;
    box-shadow: 0 24px 54px -38px rgba(60, 30, 120, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  .cloud-label {
    display: block;
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.16em;
    color: #8a83a3;
  }

  .cloud-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .cloud-tags span {
    padding: 5px 13px;
    font-size: 13px;
    font-weight: 600;
    color: #4a3fa8;
    background: rgba(123, 61, 255, 0.08);
    border: 1px solid rgba(123, 61, 255, 0.16);
    border-radius: 999px;
    transition: transform 0.22s ease, background 0.22s ease, color 0.22s ease;
  }

  .cloud-tags span:hover {
    transform: translateY(-2px);
    color: #a3174f;
    background: linear-gradient(120deg, rgba(255, 61, 127, 0.16), rgba(123, 61, 255, 0.16));
  }

  /* ---------- section ---------- */
  .section {
    padding: 66px 0;
  }

  .section-head {
    max-width: 780px;
    margin: 0 auto 40px;
    text-align: center;
  }

  .kicker {
    display: inline-block;
    margin-bottom: 14px;
    padding: 5px 14px;
    font-size: 12.5px;
    font-weight: 800;
    letter-spacing: 0.16em;
    color: #c9235f;
    background: rgba(255, 61, 127, 0.1);
    border-radius: 999px;
  }

  .section-head h2 {
    margin: 0 0 14px;
    font-size: clamp(23px, 3vw, 34px);
    line-height: 1.35;
    font-weight: 900;
    letter-spacing: -0.01em;
    color: #14112b;
  }

  .section-head h2::after {
    content: "";
    display: block;
    width: 56px;
    height: 4px;
    margin: 16px auto 0;
    border-radius: 999px;
    background: linear-gradient(90deg, #ff3d7f, #ff8a3d, #7b3dff);
  }

  .section-head p {
    margin: 0;
    font-size: 15.5px;
    color: #565073;
  }

  /* ---------- metrics ---------- */
  .metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .metrics li {
    padding: 22px 18px;
    text-align: center;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 16px;
    box-shadow: 0 18px 40px -34px rgba(60, 30, 120, 0.6);
  }

  .metrics strong {
    display: block;
    font-size: 27px;
    font-weight: 900;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: #7b3dff;
  }

  .metrics span {
    font-size: 14px;
    color: #565073;
  }

  /* ---------- grid & cards ---------- */
  .grid {
    display: grid;
    gap: 20px;
  }

  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .card {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 24px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 18px;
    box-shadow: 0 18px 42px -34px rgba(60, 30, 120, 0.55);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  }

  .card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 61, 127, 0.28);
    box-shadow: 0 26px 50px -30px rgba(60, 30, 120, 0.6);
  }

  .card h3 {
    margin: 0 0 8px;
    font-size: 17px;
    font-weight: 800;
    color: #161326;
  }

  .card p {
    margin: 0;
    font-size: 14.5px;
    line-height: 1.72;
    color: #565073;
  }

  .feature-card::before {
    content: "";
    display: block;
    width: 34px;
    height: 4px;
    margin-bottom: 16px;
    border-radius: 999px;
    background: linear-gradient(90deg, #ff3d7f, #7b3dff);
  }

  .svc-mark {
    display: block;
    width: 34px;
    height: 34px;
    margin-bottom: 14px;
    border-radius: 11px;
    background: linear-gradient(135deg, #ff3d7f, #7b3dff);
  }

  .svc-grid .card:nth-child(3n+1) .svc-mark {
    background: linear-gradient(135deg, #ff3d7f, #ff8a3d);
  }

  .svc-grid .card:nth-child(3n+2) .svc-mark {
    background: linear-gradient(135deg, #7b3dff, #b56bff);
  }

  .svc-grid .card:nth-child(3n+3) .svc-mark {
    background: linear-gradient(135deg, #00c9c0, #4d8cff);
  }

  .tag-cloud {
    margin-top: 24px;
    padding: 22px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(22, 19, 38, 0.08);
    border-radius: 18px;
  }

  /* ---------- split ---------- */
  .split {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 28px;
    align-items: start;
  }

  .flow-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .flow-item {
    padding: 20px 22px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-left: 4px solid transparent;
    border-radius: 16px;
    box-shadow: 0 18px 40px -36px rgba(60, 30, 120, 0.6);
    transition: transform 0.26s ease, border-color 0.26s ease;
  }

  .flow-item:hover {
    transform: translateX(4px);
    border-left-color: #ff3d7f;
  }

  .flow-item h3 {
    margin: 0 0 6px;
    font-size: 16.5px;
    font-weight: 800;
    color: #161326;
  }

  .flow-item p {
    margin: 0;
    font-size: 14.5px;
    color: #565073;
  }

  .cta-panel {
    padding: 30px 26px;
    color: #ffffff;
    background: linear-gradient(145deg, #4b1fb8 0%, #7b3dff 52%, #ff3d7f 100%);
    border-radius: 20px;
    box-shadow: 0 26px 54px -30px rgba(123, 61, 255, 0.9);
  }

  .cta-panel .cta-kicker {
    margin: 0 0 10px;
    font-size: 12.5px;
    font-weight: 800;
    letter-spacing: 0.16em;
    color: rgba(255, 255, 255, 0.82);
  }

  .cta-panel h3 {
    margin: 0 0 10px;
    font-size: 21px;
    font-weight: 900;
    line-height: 1.4;
    color: #ffffff;
  }

  .cta-panel p {
    margin: 0 0 20px;
    font-size: 14.5px;
    color: rgba(255, 255, 255, 0.9);
  }

  .cta-panel .btn {
    width: 100%;
    color: #6a1a8f;
    background: #ffffff;
    box-shadow: 0 14px 28px -16px rgba(0, 0, 0, 0.5);
  }

  .cta-panel .btn:hover {
    color: #c9235f;
  }

  /* ---------- steps ---------- */
  .step-card {
    position: relative;
    padding-top: 26px;
  }

  .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-bottom: 14px;
    font-size: 15px;
    font-weight: 900;
    color: #ffffff;
    border-radius: 12px;
    background: linear-gradient(135deg, #ff3d7f, #7b3dff);
  }

  .step-card:nth-child(2) .step-num {
    background: linear-gradient(135deg, #7b3dff, #4d8cff);
  }

  .step-card:nth-child(3) .step-num {
    background: linear-gradient(135deg, #4d8cff, #00c9c0);
  }

  .step-card:nth-child(4) .step-num {
    background: linear-gradient(135deg, #ff8a3d, #ff3d7f);
  }

  /* ---------- network ---------- */
  .network-panel {
    padding: 30px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 20px;
    box-shadow: 0 20px 50px -38px rgba(60, 30, 120, 0.6);
  }

  .network-panel > p {
    margin: 0 0 20px;
    font-size: 15px;
    color: #565073;
  }

  .city-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .city-list li {
    padding: 7px 16px;
    font-size: 14px;
    font-weight: 600;
    color: #3d3757;
    background: rgba(123, 61, 255, 0.07);
    border: 1px solid rgba(123, 61, 255, 0.14);
    border-radius: 999px;
    transition: transform 0.22s ease, background 0.22s ease;
  }

  .city-list li:hover {
    transform: translateY(-2px);
    background: rgba(255, 61, 127, 0.12);
  }

  /* ---------- cases ---------- */
  .case-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    margin: 0;
    padding: 14px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 18px;
    box-shadow: 0 18px 44px -36px rgba(60, 30, 120, 0.6);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
  }

  .case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 26px 50px -32px rgba(60, 30, 120, 0.6);
  }

  .case-media {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: 13px;
    background: #f2eeff;
  }

  .case-media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .case-card:hover .case-media img {
    transform: scale(1.05);
  }

  .case-card figcaption {
    padding: 16px 8px 6px;
  }

  .case-card h3 {
    margin: 0 0 6px;
    font-size: 16.5px;
    font-weight: 800;
    color: #161326;
  }

  .case-card p {
    margin: 0;
    font-size: 14px;
    color: #565073;
  }

  /* ---------- review ---------- */
  .review-hero {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 22px;
    margin-bottom: 26px;
  }

  .score-box {
    padding: 30px 24px;
    text-align: center;
    background: #ffffff;
    border: 1px solid rgba(255, 61, 127, 0.24);
    border-radius: 20px;
    box-shadow: 0 24px 50px -34px rgba(255, 61, 127, 0.6);
  }

  .score-value {
    font-size: 52px;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: #c9235f;
  }

  .score-value span {
    margin-left: 4px;
    font-size: 20px;
    font-weight: 700;
    color: #8a83a3;
  }

  .score-stars {
    margin: 8px 0 6px;
    font-size: 21px;
    letter-spacing: 4px;
    color: #ff8a3d;
  }

  .score-box p {
    margin: 0;
    font-size: 14.5px;
    font-weight: 700;
    color: #565073;
  }

  .score-desc {
    padding: 28px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 20px;
    box-shadow: 0 20px 46px -38px rgba(60, 30, 120, 0.6);
  }

  .score-desc h3 {
    margin: 0 0 10px;
    font-size: 19px;
    font-weight: 800;
    color: #161326;
  }

  .score-desc p {
    margin: 0 0 12px;
    font-size: 14.8px;
    color: #565073;
  }

  .score-desc p:last-child {
    margin-bottom: 0;
  }

  .table-wrap {
    overflow-x: auto;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.08);
    border-radius: 18px;
    box-shadow: 0 20px 48px -38px rgba(60, 30, 120, 0.6);
  }

  .cmp-table {
    width: 100%;
    min-width: 700px;
    border-collapse: collapse;
    font-size: 14.5px;
  }

  .cmp-table th,
  .cmp-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid rgba(22, 19, 38, 0.07);
    color: #3d3757;
    vertical-align: top;
  }

  .cmp-table thead th {
    font-weight: 800;
    color: #161326;
    background: linear-gradient(120deg, rgba(255, 61, 127, 0.1), rgba(123, 61, 255, 0.1));
  }

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

  .cmp-table tbody tr:hover td {
    background: rgba(123, 61, 255, 0.04);
  }

  .cmp-table td:last-child {
    color: #5a3bd6;
    font-weight: 600;
  }

  /* ---------- voices ---------- */
  .voice-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    margin: 0;
    padding: 24px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 18px;
    box-shadow: 0 18px 44px -36px rgba(60, 30, 120, 0.6);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  }

  .voice-card:hover {
    transform: translateY(-4px);
    border-color: rgba(123, 61, 255, 0.28);
    box-shadow: 0 26px 50px -32px rgba(60, 30, 120, 0.6);
  }

  .voice-card blockquote {
    margin: 0 0 18px;
    padding: 0;
    font-size: 14.8px;
    line-height: 1.75;
    color: #3d3757;
  }

  .voice-card figcaption {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    font-size: 16px;
    font-weight: 800;
    color: #ffffff;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff3d7f, #7b3dff);
  }

  .voice-meta strong {
    display: block;
    font-size: 14.5px;
    font-weight: 800;
    color: #161326;
    line-height: 1.4;
  }

  .voice-meta em {
    display: block;
    font-style: normal;
    font-size: 13px;
    color: #8a83a3;
    line-height: 1.4;
  }

  /* ---------- token ---------- */
  .token-note {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 24px;
    padding: 22px 26px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px dashed rgba(123, 61, 255, 0.3);
    border-radius: 18px;
  }

  .token-note p {
    margin: 0;
    font-size: 14.5px;
    color: #565073;
    flex: 1 1 320px;
  }

  /* ---------- partner ---------- */
  .partner-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    padding: 36px 34px;
    color: #ffffff;
    background: linear-gradient(120deg, #3a1d6e 0%, #7b3dff 58%, #ff3d7f 100%);
    border-radius: 22px;
    box-shadow: 0 30px 60px -34px rgba(123, 61, 255, 0.9);
  }

  .partner-banner h2 {
    margin: 0 0 10px;
    font-size: clamp(20px, 2.6vw, 27px);
    font-weight: 900;
    line-height: 1.4;
    color: #ffffff;
  }

  .partner-banner p {
    margin: 0;
    max-width: 660px;
    font-size: 14.8px;
    color: rgba(255, 255, 255, 0.92);
  }

  .partner-banner .btn {
    color: #6a1a8f;
    background: #ffffff;
    box-shadow: 0 16px 30px -18px rgba(0, 0, 0, 0.5);
  }

  .partner-banner .btn:hover {
    color: #c9235f;
  }

  /* ---------- form ---------- */
  .contact-form {
    padding: 28px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 20px;
    box-shadow: 0 22px 50px -36px rgba(60, 30, 120, 0.6);
  }

  .form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .field {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: 16px;
  }

  .field label {
    font-size: 14px;
    font-weight: 700;
    color: #3d3757;
  }

  .field input,
  .field select,
  .field textarea {
    width: 100%;
    padding: 11px 14px;
    font-family: inherit;
    font-size: 14.5px;
    color: #161326;
    background: #faf8ff;
    border: 1px solid rgba(22, 19, 38, 0.12);
    border-radius: 11px;
    transition: border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
  }

  .field textarea {
    resize: vertical;
    min-height: 108px;
  }

  .field input::placeholder,
  .field textarea::placeholder {
    color: #9d97b3;
  }

  .field input:focus,
  .field select:focus,
  .field textarea:focus {
    outline: none;
    background: #ffffff;
    border-color: rgba(123, 61, 255, 0.55);
    box-shadow: 0 0 0 3px rgba(123, 61, 255, 0.12);
  }

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

  .qr-card {
    text-align: center;
  }

  .qr-img {
    display: block;
    width: 152px;
    max-width: 100%;
    height: auto;
    margin: 6px auto 12px;
    border-radius: 12px;
    border: 1px solid rgba(22, 19, 38, 0.08);
  }

  .qr-card p {
    font-size: 13.5px;
  }

  .contact-list {
    margin: 0;
    padding: 8px 22px;
    list-style: none;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.07);
    border-radius: 18px;
    box-shadow: 0 18px 44px -38px rgba(60, 30, 120, 0.55);
  }

  .contact-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 11px 0;
    font-size: 14px;
    border-bottom: 1px solid rgba(22, 19, 38, 0.06);
  }

  .contact-list li:last-child {
    border-bottom: none;
  }

  .contact-list span {
    color: #8a83a3;
    flex: 0 0 auto;
  }

  .contact-list a,
  .contact-list strong {
    color: #3d3757;
    font-weight: 700;
    text-decoration: none;
    text-align: right;
    word-break: break-all;
  }

  .contact-list a:hover {
    color: #c9235f;
  }

  /* ---------- faq ---------- */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
  }

  .faq-item {
    padding: 2px 20px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.08);
    border-radius: 14px;
    box-shadow: 0 14px 36px -34px rgba(60, 30, 120, 0.6);
    transition: border-color 0.24s ease;
  }

  .faq-item[open] {
    border-color: rgba(255, 61, 127, 0.35);
  }

  .faq-item summary {
    position: relative;
    padding: 15px 32px 15px 0;
    font-size: 15.5px;
    font-weight: 700;
    color: #161326;
    list-style: none;
    cursor: pointer;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 21px;
    font-weight: 400;
    line-height: 1;
    color: #7b3dff;
    transition: transform 0.24s ease;
  }

  .faq-item[open] summary::after {
    transform: translateY(-50%) rotate(45deg);
  }

  .faq-body p {
    margin: 0 0 16px;
    font-size: 14.5px;
    color: #565073;
  }

  /* ---------- news ---------- */
  .news-list {
    display: grid;
    gap: 12px;
    max-width: 920px;
    margin: 0 auto;
    padding: 0;
    list-style: none;
  }

  .news-list a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.08);
    border-radius: 14px;
    text-decoration: none;
    box-shadow: 0 14px 36px -36px rgba(60, 30, 120, 0.6);
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
  }

  .news-list a:hover {
    transform: translateY(-3px);
    border-color: rgba(123, 61, 255, 0.3);
    box-shadow: 0 22px 44px -32px rgba(60, 30, 120, 0.55);
  }

  .news-tag {
    flex: 0 0 auto;
    padding: 3px 11px;
    font-size: 12px;
    font-weight: 800;
    color: #5a3bd6;
    background: rgba(123, 61, 255, 0.1);
    border-radius: 999px;
  }

  .news-title {
    flex: 1 1 auto;
    font-size: 15px;
    font-weight: 700;
    color: #161326;
  }

  .news-arrow {
    flex: 0 0 auto;
    font-size: 15px;
    font-weight: 800;
    color: #7b3dff;
  }

  /* ---------- footer ---------- */
  .site-footer {
    margin-top: 10px;
    padding: 42px 0 22px;
    background: #ffffff;
    border-top: 1px solid rgba(22, 19, 38, 0.08);
  }

  .footer-top {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .footer-brand p {
    max-width: 460px;
    margin: 12px 0 10px;
    font-size: 14px;
    color: #565073;
  }

  .footer-site {
    font-size: 14px;
    font-weight: 700;
    color: #4a3fa8;
    text-decoration: none;
  }

  .footer-site:hover {
    color: #c9235f;
  }

  .footer-links h3 {
    margin: 0 0 14px;
    font-size: 15px;
    font-weight: 800;
    color: #161326;
  }

  .footer-links ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 18px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .footer-links a {
    font-size: 14px;
    color: #4a3fa8;
    text-decoration: none;
  }

  .footer-links a:hover {
    color: #c9235f;
    text-decoration: underline;
  }

  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 24px;
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid rgba(22, 19, 38, 0.08);
  }

  .footer-bottom p {
    margin: 0;
    font-size: 13px;
    color: #6b6484;
  }

  .footer-bottom a {
    color: #4a3fa8;
    text-decoration: none;
  }

  .footer-bottom a:hover {
    color: #c9235f;
  }

  /* ---------- float tools ---------- */
  .float-tools {
    position: fixed;
    right: 18px;
    bottom: 22px;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .float-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    padding: 0;
    font-family: inherit;
    font-size: 13px;
    font-weight: 800;
    color: #ffffff;
    background: linear-gradient(135deg, #ff3d7f, #7b3dff);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 16px 30px -14px rgba(123, 61, 255, 0.85);
    transition: transform 0.24s ease, opacity 0.24s ease;
  }

  .float-btn:hover {
    transform: translateY(-3px);
  }

  #topBtn {
    color: #3d3757;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.12);
    font-size: 18px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: transform 0.24s ease, opacity 0.24s ease, box-shadow 0.24s ease;
  }

  #topBtn.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .kefu-panel {
    position: fixed;
    right: 18px;
    bottom: 148px;
    z-index: 95;
    width: 220px;
    padding: 18px;
    text-align: center;
    background: #ffffff;
    border: 1px solid rgba(22, 19, 38, 0.1);
    border-radius: 16px;
    box-shadow: 0 26px 55px -24px rgba(60, 30, 120, 0.6);
  }

  .kefu-panel p {
    margin: 0 0 10px;
    font-size: 13.5px;
    font-weight: 700;
    color: #161326;
  }

  .kefu-panel img {
    display: block;
    width: 100%;
    max-width: 150px;
    height: auto;
    margin: 0 auto 12px;
    border-radius: 10px;
  }

  .kefu-close {
    padding: 6px 18px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    color: #3d3757;
    background: #f4f1ff;
    border: 1px solid rgba(22, 19, 38, 0.1);
    border-radius: 999px;
    cursor: pointer;
  }

  .kefu-close:hover {
    color: #c9235f;
  }

  /* ---------- reveal ---------- */
  .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.65s ease, transform 0.65s ease;
  }

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

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    .reveal {
      opacity: 1;
      transform: none;
      transition: none;
    }

    .btn,
    .card,
    .case-card,
    .voice-card,
    .news-list a,
    .flow-item,
    .city-list li,
    .cloud-tags span,
    .case-media img {
      transition: none;
    }
  }

  /* ---------- responsive ---------- */
  @media (max-width: 1080px) {
    .nav-toggle {
      display: flex;
    }

    .nav-links {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      flex-direction: column;
      align-items: stretch;
      justify-content: flex-start;
      gap: 0;
      padding: 10px 20px 18px;
      background: #ffffff;
      border-bottom: 1px solid rgba(22, 19, 38, 0.1);
      box-shadow: 0 26px 44px -32px rgba(22, 19, 38, 0.55);
    }

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

    .nav-links a {
      padding: 11px 8px;
      font-size: 15px;
      border-radius: 8px;
    }

    .nav-cta {
      padding: 9px 16px;
      font-size: 14px;
    }
  }

  @media (max-width: 980px) {
    .grid-3,
    .grid-4 {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .split,
    .review-hero {
      grid-template-columns: minmax(0, 1fr);
    }

    .about-grid > .card:last-child {
      grid-column: span 2;
    }

    .metrics {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-top {
      grid-template-columns: minmax(0, 1fr);
    }
  }

  @media (max-width: 640px) {
    .section {
      padding: 52px 0;
    }

    .hero {
      padding: 46px 0 36px;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
      grid-template-columns: minmax(0, 1fr);
    }

    .about-grid > .card:last-child {
      grid-column: span 1;
    }

    .form-row {
      grid-template-columns: minmax(0, 1fr);
    }

    .case-grid {
      grid-template-columns: minmax(0, 1fr);
    }

    .contact-form {
      padding: 22px 18px;
    }

    .partner-banner {
      padding: 28px 22px;
    }

    .cta-panel {
      padding: 26px 22px;
    }

    .news-title {
      font-size: 14px;
    }

    .footer-links ul {
      grid-template-columns: minmax(0, 1fr);
    }

    .float-btn {
      width: 48px;
      height: 48px;
      font-size: 12px;
    }

    #topBtn {
      font-size: 16px;
    }
  }

  @media (max-width: 420px) {
    .brand-text {
      display: none;
    }

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