/* roulang page: index */
:root {
      --gold: #C89B3C;
      --gold-dark: #B8862D;
      --deep-dark: #1A1A2E;
      --accent-red: #D43D3D;
      --warm-bg: #F9F6F0;
      --white: #FFFFFF;
      --text-primary: #1A1A2E;
      --text-secondary: #5C5C5C;
      --border-light: rgba(200, 155, 60, 0.2);
      --shadow-sm: 0 2px 12px rgba(26, 26, 46, 0.06);
      --shadow-hover: 0 8px 24px rgba(26, 26, 46, 0.12);
      --radius-card: 16px;
      --radius-pill: 50px;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Inter', 'Noto Sans SC', sans-serif;
      --font-mono: 'DM Mono', monospace;
      --nav-height: 72px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background: var(--warm-bg);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 600;
      margin: 0;
    }

    a {
      color: var(--gold);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      text-decoration: underline;
      text-decoration-color: var(--gold);
    }

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

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

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: var(--deep-dark);
      box-shadow: 0 1px 0 var(--gold);
      z-index: 100;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--gold);
      letter-spacing: 1px;
      white-space: nowrap;
    }
    .logo a {
      color: inherit;
      text-decoration: none;
    }

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

    .nav-links a {
      color: #F9F6F0;
      font-weight: 500;
      font-size: 0.95rem;
      text-decoration: none;
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--gold);
      border-bottom-color: var(--gold);
    }

    .nav-cta {
      background: var(--gold);
      color: var(--deep-dark) !important;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      border-bottom: none !important;
      transition: 0.25s;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--gold-dark);
      color: var(--deep-dark) !important;
      box-shadow: 0 0 16px rgba(200, 155, 60, 0.5);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #F9F6F0;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: radial-gradient(circle at center, #2a2a44 0%, #1A1A2E 90%);
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 100px 24px 60px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
      mix-blend-mode: overlay;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }

    .hero h1 {
      font-size: clamp(36px, 7vw, 60px);
      line-height: 1.2;
      color: var(--white);
      font-weight: 700;
      margin-bottom: 20px;
    }
    .hero h1 span {
      color: var(--gold);
    }
    .hero .subtitle {
      font-size: 1.2rem;
      color: rgba(249, 246, 240, 0.85);
      margin-bottom: 36px;
      font-weight: 400;
    }

    .btn-primary {
      background: var(--gold);
      color: var(--deep-dark);
      font-weight: 600;
      padding: 14px 38px;
      border-radius: var(--radius-pill);
      font-size: 1rem;
      border: none;
      cursor: pointer;
      transition: 0.25s;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 0 20px rgba(200, 155, 60, 0.3);
    }
    .btn-primary:hover {
      background: var(--gold-dark);
      box-shadow: 0 0 24px rgba(200, 155, 60, 0.5);
      text-decoration: none;
      color: var(--deep-dark);
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 12px 32px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      transition: 0.2s;
      display: inline-block;
      margin-left: 16px;
    }
    .btn-secondary:hover {
      background: rgba(200, 155, 60, 0.1);
      text-decoration: none;
    }

    .section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 48px;
      text-align: center;
      color: var(--deep-dark);
    }
    .gold-line {
      width: 60px;
      height: 1px;
      background: rgba(200, 155, 60, 0.4);
      margin: 16px auto 40px;
    }

    /* 痛点区 */
    .pain-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
      justify-content: center;
    }
    .pain-item {
      display: flex;
      align-items: flex-start;
      gap: 20px;
      background: var(--white);
      padding: 28px 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      max-width: 500px;
    }
    .pain-icon {
      font-size: 2rem;
      color: var(--accent-red);
    }

    /* 优势卡片 混合布局 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .adv-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
      position: relative;
      border-top: 3px solid transparent;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-top-color: var(--gold);
    }
    .adv-icon {
      font-size: 3rem;
      margin-bottom: 20px;
      color: var(--gold);
    }
    .adv-card h3 {
      font-size: 1.4rem;
      margin-bottom: 12px;
    }
    .badge {
      background: var(--warm-bg);
      color: var(--gold);
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 30px;
      font-size: 0.8rem;
      display: inline-block;
      margin-top: 14px;
    }

    /* 数据墙 */
    .stats-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 36px;
      text-align: center;
    }
    .stat-item {
      background: var(--white);
      padding: 24px 32px;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
      min-width: 150px;
      border-left: 4px solid var(--gold);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.2;
    }
    .stat-label {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .testimonial-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      box-shadow: var(--shadow-sm);
    }
    .avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #ddd;
      flex-shrink: 0;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
    }
    .quote {
      font-style: italic;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .author {
      font-weight: 600;
      color: var(--gold);
    }

    /* FAQ */
    .accordion-item {
      background: var(--white);
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }
    .accordion-title {
      font-weight: 600;
      padding: 20px 28px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      color: var(--deep-dark);
      border-left: 3px solid transparent;
      transition: 0.2s;
    }
    .accordion-title:hover {
      border-left-color: var(--gold);
    }
    .accordion-content {
      padding: 0 28px 20px;
      color: var(--text-secondary);
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    .accordion-item.active .accordion-title {
      border-left-color: var(--gold);
      background: #fdfaf3;
    }

    /* CTA 区 */
    .cta-section {
      background: var(--deep-dark);
      text-align: center;
      padding: 80px 24px;
      color: white;
      position: relative;
    }
    .cta-section h2 {
      font-size: 2.5rem;
      margin-bottom: 20px;
    }

    /* 页脚 */
    .site-footer {
      background: #111122;
      color: #aaa;
      padding: 48px 24px 24px;
    }
    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 40px;
      max-width: 1200px;
      margin: 0 auto 32px;
    }
    .footer-logo {
      font-family: var(--font-serif);
      font-size: 1.6rem;
      color: var(--gold);
    }
    .footer-links a {
      display: block;
      color: #bbb;
      margin-bottom: 6px;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        background: var(--deep-dark);
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        padding: 30px;
        gap: 24px;
      }
      .nav-links.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .hero h1 {
        font-size: 2.4rem;
      }
    }