/* roulang page: index */
:root {
      --primary-red: #E43D2A;
      --deep-blue: #1A1F3A;
      --gold-yellow: #F5B642;
      --bg-light: #F7F8FA;
      --white: #FFFFFF;
      --text-dark: #1A1F3A;
      --text-gray: #5C6170;
      --border-light: rgba(26,31,58,0.08);
      --shadow-sm: 0 6px 24px rgba(26,31,58,0.06);
      --shadow-hover: 0 16px 36px rgba(26,31,58,0.12);
      --radius-card: 20px;
      --radius-btn: 10px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition: 0.25s ease;
    }

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

    body {
      font-family: var(--font-body);
      background: var(--white);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

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

    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 3.4rem;
      line-height: 1.2;
      font-weight: 800;
    }

    h2 {
      font-size: 2.2rem;
      margin-bottom: 1rem;
      font-weight: 700;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
    }

    p {
      color: var(--text-gray);
      margin-bottom: 1.25rem;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-card);
    }

    .btn-primary {
      display: inline-block;
      background: var(--primary-red);
      color: white;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 18px rgba(228,61,42,0.2);
      letter-spacing: 0.5px;
    }

    .btn-primary:hover {
      background: #C62F1F;
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(228,61,42,0.3);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--deep-blue);
      color: var(--deep-blue);
      font-weight: 600;
      padding: 12px 34px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      display: inline-block;
    }

    .btn-outline:hover {
      background: var(--deep-blue);
      color: white;
      transform: translateY(-2px);
    }

    .section {
      padding: 100px 0;
    }

    .section-alt {
      background: var(--bg-light);
    }

    /* 导航 */
    .top-bar {
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 100;
      background: rgba(26,31,58,0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      transition: background 0.3s;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 2rem;
      height: 72px;
      max-width: 1300px;
      margin: 0 auto;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 1px;
    }

    .logo i {
      color: var(--gold-yellow);
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      gap: 2.5rem;
      align-items: center;
    }

    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 5px 0;
      transition: color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: white;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 3px;
      background: var(--gold-yellow);
      transition: 0.25s;
      border-radius: 4px;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .menu-icon {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--deep-blue);
        flex-direction: column;
        padding: 2rem;
        gap: 1.8rem;
        border-top: 1px solid rgba(255,255,255,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-icon {
        display: block;
      }
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1A1F3A 0%, #0D1020 100%);
      position: relative;
      overflow: hidden;
      padding: 160px 0 120px;
      color: white;
    }

    .hero::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" opacity="0.08"><path d="M45 40 Q80 10 110 40 T170 45" stroke="%23F5B642" fill="none" stroke-width="1.2"/><path d="M30 80 Q70 55 105 85 T165 82" stroke="%23E43D2A" fill="none" stroke-width="1"/></svg>');
      background-size: cover;
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 3rem;
    }

    .hero-left {
      flex: 1;
    }

    .hero-left h1 {
      font-size: 3.6rem;
      margin-bottom: 1.5rem;
      color: white;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.75);
      margin-bottom: 2rem;
      max-width: 500px;
    }

    .hero-badges {
      display: flex;
      gap: 2rem;
      margin-top: 2.5rem;
    }

    .badge-item {
      text-align: center;
    }

    .badge-number {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--gold-yellow);
      line-height: 1.2;
    }

    .badge-label {
      font-size: 0.85rem;
      color: rgba(255,255,255,0.7);
    }

    .hero-right img {
      max-height: 420px;
      object-fit: contain;
      border-radius: 28px;
      box-shadow: 0 30px 50px rgba(0,0,0,0.5);
    }

    /* 卡片通用 */
    .card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
      height: 100%;
    }

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

    .pain-card, .advantage-card {
      background: white;
    }

    .icon-circle {
      width: 50px;
      height: 50px;
      background: rgba(228,61,42,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-red);
      font-size: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .data-badge {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--gold-yellow);
      line-height: 1;
      margin-bottom: 0.5rem;
    }

    .testimonial-card {
      background: white;
      padding: 2rem;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
    }

    .stars {
      color: var(--gold-yellow);
      margin-bottom: 1rem;
    }

    .avatar {
      width: 48px;
      height: 48px;
      background: #ddd;
      border-radius: 50%;
      margin-right: 1rem;
      background-image: url('/assets/images/coverpic/cover-3.webp');
      background-size: cover;
    }

    .accordion-title {
      font-weight: 700;
      font-size: 1.1rem;
      border-left: 4px solid var(--gold-yellow);
      padding-left: 1rem;
      background: transparent;
      border-top: none;
    }

    .footer-cta {
      background: var(--deep-blue);
      color: white;
      padding: 80px 0;
      text-align: center;
    }

    footer {
      background: #0D1020;
      color: rgba(255,255,255,0.7);
      padding: 60px 0 30px;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 2.6rem; }
      .hero-content { flex-direction: column; }
      .section { padding: 70px 0; }
    }

    @media (max-width: 640px) {
      h1 { font-size: 2rem; }
      .hero-badges { flex-wrap: wrap; gap: 1rem; }
      .grid-x { grid-template-columns: 1fr; }
    }