/* roulang page: index */
:root {
      --deep-space: #0f0f2d;
      --cosmic-purple: #1a1a3e;
      --star-gold: #d4a843;
      --star-gold-light: #e8c97a;
      --nebula-cyan: #2dd4bf;
      --warm-white: #faf7f2;
      --text-light: #e0e0e0;
      --text-muted: #b0b0c0;
      --card-bg: rgba(20, 20, 45, 0.7);
      --card-border: rgba(212, 168, 67, 0.25);
      --card-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
      --gold-gradient: linear-gradient(135deg, #d4a843 0%, #b58a2e 100%);
      --glass-bg: rgba(255, 255, 255, 0.04);
      --radius-md: 16px;
      --radius-sm: 12px;
      --font-title: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', '苹方', '思源黑体', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', '苹方', 'Helvetica Neue', sans-serif;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-body);
      background: radial-gradient(circle at 20% 10%, #1a1a3e 0%, #0a0a20 90%);
      color: var(--text-light);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 600;
      letter-spacing: 0.5px;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 卡片化导航面板 */
    .stellar-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 1240px;
      background: rgba(15, 15, 35, 0.8);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-radius: 60px;
      padding: 8px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(212, 168, 67, 0.2);
      z-index: 99;
      transition: var(--transition);
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--star-gold-light);
      letter-spacing: 1px;
      text-shadow: 0 0 15px rgba(212,168,67,0.5);
    }

    .nav-brand i {
      font-size: 2rem;
      color: var(--nebula-cyan);
    }

    .nav-links {
      display: flex;
      gap: 8px;
      align-items: center;
    }

    .nav-link {
      padding: 10px 16px;
      border-radius: 40px;
      font-weight: 500;
      color: #ddd;
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(5px);
      transition: var(--transition);
      font-size: 0.95rem;
      border: 1px solid transparent;
    }

    .nav-link:hover {
      color: var(--star-gold);
      background: rgba(212,168,67,0.15);
      border-color: rgba(212,168,67,0.5);
      box-shadow: 0 0 12px rgba(212,168,67,0.3);
    }

    .nav-cta {
      background: var(--gold-gradient);
      color: #0a0a20;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: 40px;
      border: none;
      box-shadow: 0 4px 15px rgba(212,168,67,0.5);
    }

    .nav-cta:hover {
      box-shadow: 0 0 22px #d4a843;
      color: #000;
    }

    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--star-gold);
      cursor: pointer;
      background: transparent;
      border: none;
    }

    /* Hero */
    #hero {
      padding: 160px 0 100px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }

    .hero-content {
      flex: 1 1 500px;
    }

    .hero-visual {
      flex: 1 1 400px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 380px;
      border-radius: 32px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.7);
      border: 1px solid rgba(212,168,67,0.3);
      backdrop-filter: blur(4px);
    }

    h1 {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--warm-white);
      text-shadow: 0 4px 20px rgba(0,0,0,0.7);
      line-height: 1.2;
    }

    .highlight {
      color: var(--star-gold);
      text-shadow: 0 0 18px #d4a843;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: #cccccc;
      margin: 20px 0 32px;
      max-width: 550px;
    }

    .btn-primary {
      background: var(--gold-gradient);
      color: #0f0f2d;
      font-weight: bold;
      padding: 14px 36px;
      border-radius: 40px;
      font-size: 1.1rem;
      display: inline-block;
      transition: var(--transition);
      border: none;
      box-shadow: 0 6px 20px rgba(212,168,67,0.4);
    }

    .btn-primary:hover {
      box-shadow: 0 0 26px #e8c97a;
      transform: translateY(-2px);
    }

    .section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 2.5rem;
      margin-bottom: 18px;
      color: var(--warm-white);
      position: relative;
    }

    .section-sub {
      color: var(--text-muted);
      margin-bottom: 50px;
      font-size: 1.1rem;
    }

    /* 痛点交替图文 */
    .pain-row {
      display: flex;
      align-items: center;
      gap: 50px;
      margin-bottom: 70px;
      flex-wrap: wrap;
    }

    .pain-text {
      flex: 1 1 300px;
    }

    .pain-img {
      flex: 1 1 300px;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      height: 260px;
      border-radius: 24px;
      border: 1px solid var(--card-border);
    }

    .solution-cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
      margin-top: 30px;
    }

    .card {
      background: var(--card-bg);
      backdrop-filter: blur(14px);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      border: 1px solid var(--card-border);
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .card:hover {
      transform: translateY(-8px);
      border-color: var(--star-gold);
      box-shadow: 0 20px 40px rgba(212,168,67,0.25);
    }

    .card-icon {
      font-size: 2.4rem;
      color: var(--nebula-cyan);
      margin-bottom: 18px;
    }

    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 30px;
      text-align: center;
    }

    .stat-number {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--star-gold);
    }

    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 18px;
    }

    .testimonial-card {
      min-width: 300px;
      background: rgba(30,30,55,0.8);
      border-radius: 24px;
      padding: 28px;
      border: 1px solid rgba(212,168,67,0.3);
    }

    .faq-item {
      background: rgba(20,20,40,0.6);
      border-radius: 16px;
      margin-bottom: 14px;
      border: 1px solid rgba(212,168,67,0.15);
      backdrop-filter: blur(8px);
    }

    .faq-question {
      padding: 22px 28px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      color: var(--warm-white);
    }

    .faq-answer {
      padding: 0 28px 22px;
      color: #ccc;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    footer {
      background: #0a0a1a;
      padding: 50px 0 20px;
      border-top: 1px solid rgba(212,168,67,0.2);
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 2.4rem;
      }
      .stellar-nav .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 20px;
        right: 20px;
        background: rgba(10,10,30,0.95);
        border-radius: 30px;
        padding: 20px;
      }
      .stellar-nav .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .hero-visual {
        min-height: 250px;
      }
    }