/* ===== 全局与变量 ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --bg-body: #f6f9fc;
      --bg-section: #ffffff;
      --bg-soft: #eef4fd;
      --bg-dark: #0b1120;
      --text-main: #0b1a33;
      --text-sub: #3e4e68;
      --text-light: #6b7b96;
      --neon-cyan: #00e5ff;
      --neon-blue: #4f7fff;
      --neon-purple: #8b5cf6;
      --neon-pink: #f472b6;
      --glow-cyan: rgba(0, 229, 255, 0.25);
      --glow-blue: rgba(79, 127, 255, 0.3);
      --border-light: rgba(0, 229, 255, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 40, 100, 0.06);
      --shadow-hover: 0 16px 48px rgba(0, 100, 255, 0.12);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --container: 1200px;
      --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font);
      background: var(--bg-body);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    /* 全局霓虹光晕背景 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -2;
      background:
        radial-gradient(ellipse 60% 50% at 15% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
        radial-gradient(ellipse 50% 40% at 85% 10%, rgba(139, 92, 246, 0.07), transparent 60%),
        radial-gradient(ellipse 40% 40% at 50% 100%, rgba(79, 127, 255, 0.06), transparent 60%);
      pointer-events: none;
    }
    /* 统一容器 */
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 通用标题与文本 */
    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.25;
      color: var(--text-main);
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul {
      list-style: none;
    }
    /* 霓虹渐变文字 */
    .gradient-text {
      background: linear-gradient(135deg, #00c6ff 0%, #4f7fff 40%, #a855f7 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* 按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 50px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      border: none;
      white-space: nowrap;
      text-align: center;
      line-height: 1.2;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00c6ff, #4f7fff 50%, #8b5cf6);
      color: #ffffff;
      box-shadow: 0 4px 20px rgba(79, 127, 255, 0.35);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 32px rgba(79, 127, 255, 0.5);
    }
    .btn-outline {
      background: transparent;
      color: var(--text-main);
      border: 1.5px solid rgba(79, 127, 255, 0.4);
    }
    .btn-outline:hover {
      border-color: var(--neon-blue);
      background: rgba(79, 127, 255, 0.06);
      transform: translateY(-2px);
    }
    /* 分区标题 */
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-head .eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: #4f7fff;
      background: rgba(79, 127, 255, 0.08);
      padding: 6px 16px;
      border-radius: 50px;
      margin-bottom: 14px;
    }
    .section-head h2 {
      font-size: clamp(26px, 4vw, 38px);
      margin-bottom: 14px;
    }
    .section-head p {
      font-size: 16px;
      color: var(--text-sub);
    }
    section {
      padding: 80px 0;
      position: relative;
    }
    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.08);
      transition: box-shadow 0.3s;
    }
    .nav.scrolled {
      box-shadow: 0 2px 24px rgba(0, 60, 150, 0.08);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand img {
      max-height: 38px;
      width: auto;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 1px;
      background: linear-gradient(135deg, #0b1a33, #4f7fff);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      justify-content: flex-end;
      flex: 1;
    }
    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
      padding: 8px 14px;
      border-radius: 8px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: #4f7fff;
      background: rgba(79, 127, 255, 0.06);
    }
    .nav-cta {
      margin-left: 12px;
      flex-shrink: 0;
    }
    .nav-cta .btn {
      padding: 10px 24px;
      font-size: 14px;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      display: block;
      width: 26px;
      height: 2.5px;
      background: var(--text-main);
      border-radius: 2px;
      transition: 0.3s;
    }
    .menu-toggle.active span:nth-child(1) {
      transform: rotate(45deg) translate(5px, 5px);
    }
    .menu-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
      transform: rotate(-45deg) translate(5px, -5px);
    }
    /* Hero 首屏 —— 无图片 */
    .hero {
      padding: 160px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      top: -20%;
      left: -10%;
      width: 55%;
      height: 70%;
      background: radial-gradient(circle, rgba(0, 229, 255, 0.12) 0%, transparent 70%);
      pointer-events: none;
      animation: floatGlow 12s ease-in-out infinite;
    }
    .hero::after {
      content: "";
      position: absolute;
      bottom: -10%;
      right: -5%;
      width: 45%;
      height: 60%;
      background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
      pointer-events: none;
      animation: floatGlow 14s ease-in-out infinite reverse;
    }
    @keyframes floatGlow {
      0%, 100% { transform: translate(0, 0) scale(1); }
      50% { transform: translate(30px, -20px) scale(1.08); }
    }
    .hero-inner {
      display: grid;
      grid-template-columns: 1fr 0.75fr;
      gap: 50px;
      align-items: center;
      position: relative;
      z-index: 1;
    }
    .hero-text h1 {
      font-size: clamp(30px, 4.2vw, 52px);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-text h1 .highlight {
      background: linear-gradient(135deg, #00c6ff, #4f7fff, #a855f7);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-text .lead {
      font-size: 17px;
      color: var(--text-sub);
      max-width: 540px;
      margin-bottom: 28px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      padding-top: 20px;
      border-top: 1px solid rgba(0, 0, 0, 0.06);
    }
    .hero-stats .stat-item .num {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
    }
    .hero-stats .stat-item .label {
      font-size: 13px;
      color: var(--text-light);
      margin-top: 2px;
    }
    /* Hero 右侧装饰卡片（纯CSS，无图片） */
    .hero-visual {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .glow-card {
      background: rgba(255, 255, 255, 0.65);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(0, 229, 255, 0.2);
      border-radius: var(--radius-lg);
      padding: 24px 28px;
      box-shadow: 0 8px 40px rgba(0, 100, 255, 0.08);
      transition: transform 0.4s, box-shadow 0.4s;
    }
    .glow-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 56px rgba(0, 150, 255, 0.16);
    }
    .glow-card h4 {
      font-size: 15px;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .glow-card .mini-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .mini-list span {
      font-size: 12px;
      font-weight: 500;
      color: #2b5fc9;
      background: rgba(79, 127, 255, 0.08);
      padding: 5px 12px;
      border-radius: 30px;
      white-space: nowrap;
    }
    .glow-card .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 12px;
    }
    .tag-row span {
      font-size: 11px;
      color: var(--text-light);
      background: rgba(0, 0, 0, 0.04);
      padding: 4px 10px;
      border-radius: 20px;
    }
    /* 数据指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      border: 1px solid rgba(0, 229, 255, 0.1);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .metric-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .metric-card .metric-num {
      font-size: 32px;
      font-weight: 800;
      background: linear-gradient(135deg, #00c6ff, #4f7fff, #8b5cf6);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
      margin-bottom: 6px;
    }
    .metric-card .metric-label {
      font-size: 14px;
      color: var(--text-sub);
    }
    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      border: 1px solid rgba(0, 229, 255, 0.08);
      box-shadow: var(--shadow-card);
      transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, #00c6ff, #4f7fff, #8b5cf6);
      opacity: 0;
      transition: opacity 0.35s;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 229, 255, 0.25);
    }
    .service-card:hover::before {
      opacity: 1;
    }
    .service-card .icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(0, 198, 255, 0.12), rgba(139, 92, 246, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 22px;
    }
    .service-card h3 {
      font-size: 18px;
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }
    /* 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }
    .step-item {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      border: 1px solid rgba(0, 229, 255, 0.08);
      position: relative;
      counter-increment: step;
      transition: transform 0.3s;
    }
    .step-item:hover {
      transform: translateY(-4px);
    }
    .step-item::before {
      content: counter(step, decimal-leading-zero);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00c6ff, #4f7fff);
      color: #fff;
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .step-item h4 {
      font-size: 16px;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-sub);
    }
    /* 对比评测 */
    .compare-wrap {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: start;
    }
    .compare-score-card {
      background: linear-gradient(145deg, #0b1120, #1a2a4a);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      color: #e8f0ff;
      box-shadow: 0 20px 60px rgba(0, 30, 80, 0.25);
      position: relative;
      overflow: hidden;
    }
    .compare-score-card::before {
      content: "";
      position: absolute;
      top: -50%;
      right: -30%;
      width: 80%;
      height: 100%;
      background: radial-gradient(circle, rgba(0, 229, 255, 0.18), transparent 70%);
      pointer-events: none;
    }
    .compare-score-card .stars {
      font-size: 26px;
      color: #ffd93d;
      letter-spacing: 4px;
      margin-bottom: 10px;
    }
    .compare-score-card .big-score {
      font-size: 64px;
      font-weight: 800;
      line-height: 1;
      margin-bottom: 6px;
      background: linear-gradient(135deg, #00e5ff, #4f7fff);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .compare-score-card .score-label {
      font-size: 14px;
      color: #8ba0c4;
      margin-bottom: 24px;
    }
    .compare-score-card ul {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .compare-score-card ul li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: #c8d8f0;
      line-height: 1.5;
    }
    .compare-score-card ul li::before {
      content: "◆";
      color: #00e5ff;
      font-size: 10px;
      margin-top: 6px;
      flex-shrink: 0;
    }
    .compare-table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      border-radius: var(--radius-md);
      border: 1px solid rgba(0, 229, 255, 0.12);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      background: var(--bg-section);
      min-width: 420px;
    }
    .compare-table th {
      background: #f0f6ff;
      color: var(--text-main);
      font-weight: 700;
      padding: 16px 18px;
      text-align: left;
      white-space: nowrap;
    }
    .compare-table td {
      padding: 14px 18px;
      border-top: 1px solid rgba(0, 0, 0, 0.05);
      color: var(--text-sub);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .highlight-cell {
      color: #2b5fc9;
      font-weight: 600;
    }
    /* FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      border: 1px solid rgba(0, 229, 255, 0.1);
      overflow: hidden;
      transition: box-shadow 0.3s, border-color 0.3s;
    }
    .faq-item:hover {
      border-color: rgba(0, 229, 255, 0.3);
      box-shadow: 0 6px 24px rgba(0, 100, 255, 0.06);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-main);
      transition: background 0.2s;
      user-select: none;
    }
    .faq-question:hover {
      background: rgba(79, 127, 255, 0.03);
    }
    .faq-question .plus {
      font-size: 22px;
      font-weight: 300;
      color: #4f7fff;
      transition: transform 0.35s;
      line-height: 1;
      flex-shrink: 0;
      width: 28px;
      text-align: center;
    }
    .faq-item.open .faq-question .plus {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    .faq-answer-inner {
      padding: 0 24px 22px 24px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }
    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid rgba(0, 229, 255, 0.08);
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .review-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .review-card .review-head {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-card .avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
      color: #fff;
    }
    .review-card .avatar.a1 { background: linear-gradient(135deg, #00c6ff, #4f7fff); }
    .review-card .avatar.a2 { background: linear-gradient(135deg, #8b5cf6, #f472b6); }
    .review-card .avatar.a3 { background: linear-gradient(135deg, #00b894, #00e5ff); }
    .review-card .avatar.a4 { background: linear-gradient(135deg, #f59e0b, #f472b6); }
    .review-card .avatar.a5 { background: linear-gradient(135deg, #4f7fff, #8b5cf6); }
    .review-card .avatar.a6 { background: linear-gradient(135deg, #06b6d4, #2b5fc9); }
    .review-card .reviewer-info .name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .review-card .reviewer-info .role {
      font-size: 12px;
      color: var(--text-light);
    }
    .review-card .review-body {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.65;
      flex: 1;
    }
    .review-card .review-stars {
      color: #ffd93d;
      font-size: 13px;
      letter-spacing: 2px;
    }
    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(0, 229, 255, 0.08);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-card .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #eef4fd;
    }
    .case-card .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-card .case-info {
      padding: 20px 22px;
    }
    .case-card .case-info h4 {
      font-size: 16px;
      margin-bottom: 6px;
    }
    .case-card .case-info p {
      font-size: 13px;
      color: var(--text-sub);
    }
    /* 文章列表 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .article-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid rgba(0, 229, 255, 0.08);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s, box-shadow 0.3s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .article-card .art-tag {
      font-size: 11px;
      font-weight: 600;
      color: #4f7fff;
      background: rgba(79, 127, 255, 0.08);
      padding: 4px 12px;
      border-radius: 30px;
      align-self: flex-start;
    }
    .article-card h4 {
      font-size: 16px;
      line-height: 1.4;
    }
    .article-card p {
      font-size: 13px;
      color: var(--text-sub);
      flex: 1;
    }
    .article-card a {
      font-size: 13px;
      font-weight: 600;
      color: #4f7fff;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: gap 0.25s;
    }
    .article-card a:hover {
      gap: 8px;
    }
    /* 表单区 */
    .form-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .form-info h2 {
      font-size: clamp(24px, 3vw, 34px);
      margin-bottom: 16px;
    }
    .form-info p {
      font-size: 15px;
      color: var(--text-sub);
      margin-bottom: 28px;
    }
    .contact-channels {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 14px;
      color: var(--text-sub);
    }
    .contact-item .ci-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: rgba(79, 127, 255, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }
    .contact-item strong {
      color: var(--text-main);
      font-weight: 600;
    }
    .qrcode-box {
      margin-top: 16px;
      display: flex;
      align-items: center;
      gap: 14px;
      background: var(--bg-section);
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(0, 229, 255, 0.1);
      max-width: 280px;
    }
    .qrcode-box img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      border-radius: 8px;
    }
    .qrcode-box span {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.5;
    }
    .form-card {
      background: var(--bg-section);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: 0 12px 40px rgba(0, 40, 100, 0.08);
      border: 1px solid rgba(0, 229, 255, 0.12);
    }
    .form-card .form-group {
      margin-bottom: 18px;
    }
    .form-card label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-card input,
    .form-card select,
    .form-card textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1.5px solid #dce6f5;
      font-size: 14px;
      font-family: var(--font);
      color: var(--text-main);
      background: #fafcff;
      transition: border-color 0.25s, box-shadow 0.25s;
      outline: none;
    }
    .form-card input:focus,
    .form-card select:focus,
    .form-card textarea:focus {
      border-color: #4f7fff;
      box-shadow: 0 0 0 4px rgba(79, 127, 255, 0.1);
    }
    .form-card textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-card .btn {
      width: 100%;
      margin-top: 6px;
      padding: 15px 32px;
    }
    /* 页脚 */
    .footer {
      background: var(--bg-dark);
      color: #b8c8e8;
      padding: 60px 0 0;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .brand-name {
      color: #ffffff;
      -webkit-text-fill-color: #ffffff;
      background: none;
      font-size: 22px;
      margin-bottom: 12px;
      display: block;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #8ba0c4;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      font-size: 13px;
      color: #8ba0c4;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #00e5ff;
    }
    .footer-bottom {
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 12px;
      color: #6b7b96;
    }
    .footer-bottom a {
      color: #8ba0c4;
      transition: color 0.2s;
    }
    .footer-bottom a:hover {
      color: #00e5ff;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 84px;
      z-index: 900;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-service .fs-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      cursor: pointer;
      background: #ffffff;
      color: #4f7fff;
      box-shadow: 0 4px 20px rgba(0, 80, 200, 0.15);
      border: 1px solid rgba(0, 229, 255, 0.2);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .float-service .fs-btn:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: 0 8px 28px rgba(0, 100, 255, 0.25);
    }
    .float-service .fs-btn.qr-trigger {
      background: linear-gradient(135deg, #00c6ff, #4f7fff);
      color: #fff;
    }
    .qr-pop {
      position: fixed;
      right: 84px;
      bottom: 84px;
      z-index: 950;
      background: #fff;
      border-radius: var(--radius-md);
      padding: 18px;
      box-shadow: 0 12px 40px rgba(0, 40, 100, 0.18);
      border: 1px solid rgba(0, 229, 255, 0.15);
      display: none;
      text-align: center;
      width: 180px;
    }
    .qr-pop.show {
      display: block;
      animation: fadeUp 0.3s ease;
    }
    .qr-pop img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      margin: 0 auto 8px;
      border-radius: 8px;
    }
    .qr-pop p {
      font-size: 12px;
      color: var(--text-light);
    }
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }
    /* 返回顶部 */
    .back-top {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 900;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid rgba(0, 229, 255, 0.2);
      box-shadow: 0 4px 16px rgba(0, 80, 200, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #4f7fff;
      font-size: 20px;
      transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .back-top:hover {
      background: #f0f6ff;
      transform: translateY(-2px);
    }
    /* 动效 */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .tag-cloud span {
      font-size: 13px;
      color: var(--text-sub);
      background: var(--bg-section);
      padding: 8px 18px;
      border-radius: 50px;
      border: 1px solid rgba(0, 229, 255, 0.12);
      transition: all 0.25s;
      cursor: default;
    }
    .tag-cloud span:hover {
      border-color: #4f7fff;
      color: #4f7fff;
      transform: translateY(-2px);
    }
    /* 价格参考卡片 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: var(--bg-section);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      border: 1px solid rgba(0, 229, 255, 0.1);
      box-shadow: var(--shadow-card);
      text-align: center;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .price-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .price-card .plan-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .price-card .plan-price {
      font-size: 38px;
      font-weight: 800;
      color: #2b5fc9;
      line-height: 1.2;
    }
    .price-card .plan-price small {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-light);
    }
    .price-card ul {
      margin: 20px 0 0;
      text-align: left;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .price-card ul li {
      font-size: 13px;
      color: var(--text-sub);
      display: flex;
      gap: 8px;
      align-items: flex-start;
    }
    .price-card ul li::before {
      content: "✓";
      color: #00b894;
      font-weight: 700;
      flex-shrink: 0;
    }
    /* 时间线 */
    .timeline {
      display: flex;
      flex-direction: column;
      gap: 0;
      max-width: 760px;
      margin: 0 auto;
      position: relative;
    }
    .timeline::before {
      content: "";
      position: absolute;
      left: 18px;
      top: 6px;
      bottom: 6px;
      width: 2px;
      background: linear-gradient(180deg, #00c6ff, #4f7fff, #8b5cf6);
      opacity: 0.25;
    }
    .timeline-item {
      display: flex;
      gap: 24px;
      padding: 0 0 32px 0;
      position: relative;
    }
    .timeline-item:last-child {
      padding-bottom: 0;
    }
    .timeline-item .dot {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00c6ff, #4f7fff);
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 14px;
      position: relative;
      z-index: 1;
    }
    .timeline-item .tl-content h4 {
      font-size: 16px;
      margin-bottom: 4px;
    }
    .timeline-item .tl-content p {
      font-size: 13px;
      color: var(--text-sub);
    }
    /* 服务网络 */
    .network-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      justify-content: center;
    }
    .network-tags span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      background: var(--bg-section);
      padding: 12px 24px;
      border-radius: 50px;
      border: 1px solid rgba(0, 229, 255, 0.15);
      transition: all 0.25s;
    }
    .network-tags span:hover {
      border-color: #4f7fff;
      color: #4f7fff;
      box-shadow: 0 4px 16px rgba(79, 127, 255, 0.1);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-visual {
        max-width: 480px;
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .compare-wrap {
        grid-template-columns: 1fr;
      }
      .form-wrap {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .price-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      section {
        padding: 56px 0;
      }
      .hero {
        padding: 130px 0 56px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 12px 20px 20px;
        gap: 4px;
        border-bottom: 1px solid rgba(0, 229, 255, 0.1);
        box-shadow: 0 12px 32px rgba(0, 40, 100, 0.08);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 12px 14px;
      }
      .nav-cta {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .article-grid {
        grid-template-columns: 1fr;
      }
      .steps-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .price-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        gap: 20px;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .form-card {
        padding: 24px 20px;
      }
      .floating-service {
        right: 14px;
        bottom: 76px;
      }
      .float-service .fs-btn {
        width: 46px;
        height: 46px;
        font-size: 18px;
      }
      .qr-pop {
        right: 70px;
        bottom: 76px;
      }
      .back-top {
        right: 14px;
        bottom: 14px;
        width: 42px;
        height: 42px;
        font-size: 18px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .friend-links {
        justify-content: center;
      }
    }
    @media (max-width: 480px) {
      .container {
        padding: 0 16px;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .compare-table {
        min-width: 360px;
      }
    }