/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --neon-orange: #FF5E13;
      --cyan-accent: #00F2FE;
      --deep-black: #0B0C10;
      --light-bg: #F8F9FC;
      --white: #FFFFFF;
      --text-main: #4A4A5A;
      --text-muted: #7A7A8A;
      --border-light: #E8E8EF;
      --input-bg: #F3F4F8;
      --shadow-sm: 0 10px 30px rgba(0,0,0,0.05);
      --shadow-hover: 0 20px 40px rgba(123,47,247,0.12);
      --radius-card: 20px;
      --radius-btn: 30px;
      --radius-input: 12px;
      --radius-capsule: 40px;
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: 0.2s ease-in-out;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--text-main);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, textarea {
      font-family: inherit;
      outline: none;
      border: none;
    }

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

    /* 悬浮胶囊导航 */
    .nav-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 1200px;
      background: rgba(11, 12, 16, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-capsule);
      padding: 0 24px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    }

    .logo {
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-orange));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-link {
      color: #FFFFFF;
      font-weight: 600;
      font-size: 0.95rem;
      transition: color var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover {
      color: var(--neon-orange);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      cursor: pointer;
      padding: 4px;
    }

    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: #FFFFFF;
      border-radius: 2px;
      transition: var(--transition);
    }

    /* Hero 深色背景 */
    .hero-section {
      background: radial-gradient(circle at 30% 30%, #7B2FF7, #0B0C10 80%);
      min-height: 90vh;
      display: flex;
      align-items: center;
      padding: 120px 0 80px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-title {
      font-size: clamp(2.5rem, 5vw, 4rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      background: linear-gradient(to right, #7B2FF7, #FF5E13);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 24px;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      max-width: 500px;
      margin-bottom: 32px;
    }

    .btn-primary {
      background: var(--neon-orange);
      color: white;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      display: inline-block;
      transition: all 0.25s;
      box-shadow: 0 8px 18px rgba(255,94,19,0.3);
      letter-spacing: 0.3px;
    }

    .btn-primary:hover {
      background: #ff7b3d;
      box-shadow: 0 0 24px rgba(255,94,19,0.7);
      transform: translateY(-2px);
    }

    .hero-image-placeholder {
      background: rgba(255,255,255,0.05);
      border-radius: 32px;
      height: 380px;
      display: flex;
      align-items: center;
      justify-content: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      backdrop-filter: blur(2px);
      border: 1px solid rgba(255,255,255,0.15);
    }

    /* 通用板块 */
    .section {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 56px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--deep-black);
      margin-bottom: 12px;
    }

    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    /* 服务卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(123,47,247,0.25);
    }

    .icon-circle {
      width: 56px;
      height: 56px;
      border-radius: 18px;
      background: #EEF0F5;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      font-size: 1.8rem;
    }

    .card-title {
      font-weight: 700;
      font-size: 1.4rem;
      margin-bottom: 12px;
      color: var(--deep-black);
    }

    .card-text {
      color: var(--text-muted);
    }

    /* 数据徽章 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-item {
      padding: 16px;
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      background: linear-gradient(135deg, #00F2FE, #7B2FF7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }

    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .case-img {
      height: 200px;
      background-color: #dce0e8;
      background-size: cover;
      background-position: center;
    }

    .case-content {
      padding: 20px;
    }

    /* 流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .step-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--primary-purple);
      opacity: 0.8;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: transparent;
      width: 100%;
      font-size: 1.05rem;
      color: var(--deep-black);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 20px;
      color: var(--text-main);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }

    .faq-item.active .faq-question {
      color: var(--primary-purple);
    }

    /* CTA */
    .cta-section {
      background: var(--deep-black);
      padding: 80px 0;
      color: white;
    }

    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .input-field {
      width: 100%;
      padding: 14px 18px;
      background: var(--input-bg);
      border-radius: var(--radius-input);
      margin-bottom: 16px;
      font-size: 1rem;
      border: 1px solid transparent;
      transition: 0.2s;
    }

    .input-field:focus {
      border-color: var(--primary-purple);
      box-shadow: 0 0 0 3px rgba(123,47,247,0.25);
    }

    /* 页脚 */
    .footer {
      background: #0B0C10;
      color: #aaa;
      padding: 40px 0;
      text-align: center;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
      }
      .cards-grid, .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 20px;
        right: 20px;
        background: rgba(11,12,16,0.9);
        backdrop-filter: blur(16px);
        border-radius: 28px;
        padding: 24px;
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
      .cards-grid, .steps-grid, .stats-grid {
        grid-template-columns: 1fr;
      }
      .cta-grid {
        grid-template-columns: 1fr;
      }
    }