/* roulang page: index */
:root {
      --color-primary: #6D28D9;
      --color-primary-dark: #4A0E5C;
      --color-primary-light: #A855F7;
      --color-accent: #00E5FF;
      --color-accent-dark: #0099CC;
      --color-bg-dark: #0F0F1A;
      --color-bg-deep: #1A1A2E;
      --color-bg-light: #F8F6FF;
      --color-text-light: #E0DCE8;
      --color-text-dark: #2D2A3A;
      --color-success: #10B981;
      --color-warning: #F59E0B;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card-dark: 0 4px 24px rgba(0,0,0,0.4);
      --shadow-card-light: 0 2px 16px rgba(109,40,217,0.08);
      --transition-base: 0.3s ease;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }
    body {
      font-family: var(--font-body);
      line-height: 1.75;
      color: var(--color-text-dark);
      background-color: #fff;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(15, 15, 26, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      transition: background 0.3s, box-shadow 0.3s;
    }
    .header.scrolled {
      background: rgba(10, 10, 20, 0.96);
      box-shadow: 0 4px 24px rgba(0,0,0,0.5);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-logo {
      font-size: 26px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-logo-icon {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, #6D28D9, #A855F7);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }
    .nav-logo-icon::before {
      content: "";
      width: 16px;
      height: 18px;
      background: white;
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -62%);
    }
    .nav-logo-icon::after {
      content: "";
      width: 10px;
      height: 10px;
      background: #00E5FF;
      border-radius: 50%;
      position: absolute;
      bottom: 34%;
      right: 28%;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-menu a {
      position: relative;
      font-size: 14px;
      font-weight: 500;
      color: #D1CFE0;
      transition: color 0.2s;
      padding: 8px 0;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: white;
    }
    .nav-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--color-accent);
      transition: width 0.2s;
    }
    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }
    .burger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .burger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 10px;
      transition: 0.3s;
    }
    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      inset: 0;
      background: rgba(15, 15, 24, 0.98);
      backdrop-filter: blur(20px);
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      transform: translateX(100%);
      transition: transform 0.35s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      font-size: 22px;
      font-weight: 600;
      color: #E0DCE8;
    }
    .close-menu {
      position: absolute;
      top: 24px;
      right: 32px;
      background: none;
      border: none;
      font-size: 36px;
      color: white;
      cursor: pointer;
    }

    /* 通用区块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: clamp(24px, 4vw, 36px);
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      color: inherit;
    }
    .section-desc {
      color: #5B5773;
      font-size: 16px;
      max-width: 650px;
      margin-bottom: 40px;
    }
    .bg-light {
      background-color: var(--color-bg-light);
    }
    .bg-dark {
      background-color: var(--color-bg-dark);
      color: var(--color-text-light);
    }
    .bg-deep {
      background-color: var(--color-bg-deep);
      color: var(--color-text-light);
    }
    .button {
      display: inline-block;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-size: 16px;
      cursor: pointer;
      border: none;
      transition: all 0.25s;
      text-align: center;
      min-width: 120px;
    }
    .btn-primary {
      background: var(--color-primary);
      color: white;
      box-shadow: 0 4px 14px rgba(109,40,217,0.45);
    }
    .btn-primary:hover {
      background: #7B2FBE;
      box-shadow: 0 0 24px rgba(109,40,217,0.65);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--color-accent);
      color: var(--color-accent);
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.08);
      border-color: white;
      color: white;
    }
    .btn-accent {
      background: var(--color-accent);
      color: #0F0F1A;
      font-weight: 700;
    }
    .btn-accent:hover {
      background: #80F0FF;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1E1045, #0F0F1A);
      padding-top: 90px;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 420px;
    }
    .hero-image {
      flex: 1 1 480px;
      position: relative;
    }
    .hero-image img {
      border-radius: 16px;
      width: 100%;
      height: auto;
      min-height: 270px;
      object-fit: cover;
    }
    .badge {
      display: inline-block;
      background: rgba(0,229,255,0.12);
      color: #00E5FF;
      font-weight: 600;
      font-size: 13px;
      padding: 6px 16px;
      border-radius: 30px;
      margin-bottom: 20px;
    }
    .hero h1 {
      font-size: clamp(32px, 6vw, 54px);
      font-weight: 800;
      line-height: 1.2;
      color: white;
      margin-bottom: 18px;
    }
    .hero-sub {
      font-size: 18px;
      color: #C4BDD5;
      max-width: 540px;
      margin-bottom: 30px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    /*痛点交替*/
    .pain-row {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 58px;
    }
    .pain-row:nth-child(even) {
      flex-direction: row-reverse;
    }
    .pain-content, .pain-img {
      flex: 1;
    }
    .pain-img img {
      border-radius: 20px;
      width: 100%;
      object-fit: cover;
    }
    .pain-title {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    /*卡片网格*/
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
    }
    .solution-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card-light);
      border: 1px solid rgba(109,40,217,0.1);
      transition: all 0.25s;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      border-color: var(--color-accent);
      box-shadow: 0 14px 30px rgba(0,229,255,0.18);
    }
    .card-icon {
      width: 60px;
      height: 60px;
      background: linear-gradient(145deg, #6D28D9, #A855F7);
      border-radius: 10px;
      margin-bottom: 20px;
    }
    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin: 14px 0;
    }
    .tag {
      background: #F2E9FF;
      color: #4A2B7B;
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 600;
    }
    /*数据数字*/
    .stats-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
      text-align: center;
    }
    .stat-number {
      font-size: 52px;
      font-weight: 800;
      background: linear-gradient(to right, #A855F7, #00E5FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-item p {
      color: #ADA8C0;
    }
    /* 证言横向滑动 */
    .testimonial-scroll {
      display: flex;
      gap: 22px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .testimonial-card {
      flex: 0 0 300px;
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(4px);
      border-radius: 16px;
      padding: 24px;
      border: 1px solid rgba(255,255,255,0.08);
      scroll-snap-align: start;
    }
    .quote-icon {
      font-size: 30px;
      color: var(--color-accent);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #E2DEF0;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      font-weight: 700;
      font-size: 18px;
      padding: 18px 8px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: #47415C;
    }
    .faq-answer p {
      padding: 0 8px 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    /* 联系表单 */
    .contact-form {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      max-width: 700px;
    }
    .contact-form input, .contact-form textarea {
      flex: 1 1 240px;
      background: rgba(255,255,255,0.09);
      border: 1px solid rgba(255,255,255,0.18);
      border-radius: 8px;
      padding: 14px;
      color: white;
    }
    .contact-form button {
      flex: 0 0 auto;
    }
    footer {
      background: #0A0A14;
      color: #BCB8D0;
      padding-top: 60px;
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .burger { display: flex; }
      .pain-row, .pain-row:nth-child(even) { flex-direction: column; }
    }