/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
      --primary: #E8734A;
      --primary-light: #FDE8DF;
      --primary-hover: #D4A843;
      --secondary: #2D2A26;
      --accent: #D4A843;
      --bg-warm: #FBF7F2;
      --white: #FFFFFF;
      --gray-text: #5A5550;
      --border-light: #EDE8E2;
      --border-input: #D1C9C0;
      --radius-card: 20px;
      --radius-button: 50px;
      --radius-inner: 12px;
      --shadow-card: 0 2px 16px rgba(45, 42, 38, 0.06);
      --shadow-hover: 0 8px 24px rgba(45, 42, 38, 0.12);
      --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "DIN Alternate", "Helvetica Neue", sans-serif;
      --max-width: 1200px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--secondary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    /* 悬浮胶囊导航 */
    .main-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 95%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-radius: 50px;
      padding: 10px 28px;
      box-shadow: 0 4px 20px rgba(45, 42, 38, 0.08);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: background 0.3s ease;
    }
    .main-nav.scrolled {
      background: rgba(255, 255, 255, 0.98);
    }
    .nav-logo {
      font-weight: 700;
      font-size: 1.4rem;
      letter-spacing: 0.5px;
      color: var(--primary);
      text-decoration: none;
      margin-right: 32px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      align-items: center;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--secondary);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 16px;
      border-radius: 40px;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .nav-links a:hover,
    .nav-links a:focus {
      color: var(--primary);
      background: var(--primary-light);
      outline: none;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--secondary);
      cursor: pointer;
      padding: 6px 12px;
      border-radius: 40px;
    }

    /* 通用容器 */
    .container-custom {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    section {
      padding: 80px 0;
    }

    /* Hero */
    #hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #E8734A 0%, #FBF7F2 70%);
      padding-top: 100px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 400px;
    }
    .hero-text h1 {
      font-size: clamp(2.2rem, 5vw, 3.4rem);
      font-weight: 700;
      line-height: 1.2;
      color: var(--secondary);
      margin-bottom: 20px;
    }
    .hero-text .subtitle {
      font-size: 1.15rem;
      color: #5A5550;
      margin-bottom: 36px;
      max-width: 480px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-size: 1rem;
      text-decoration: none;
      display: inline-block;
      transition: background 0.25s ease, transform 0.2s;
      box-shadow: 0 4px 12px rgba(232, 115, 74, 0.3);
    }
    .btn-primary:hover, .btn-primary:focus {
      background: var(--primary-hover);
      transform: translateY(-2px);
      color: white;
      outline: none;
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-size: 1rem;
      text-decoration: none;
      display: inline-block;
      transition: all 0.25s ease;
    }
    .btn-outline:hover, .btn-outline:focus {
      background: var(--primary-light);
      color: var(--primary);
      outline: none;
    }
    .hero-image {
      flex: 1 1 400px;
      position: relative;
    }
    .hero-image img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-hover);
    }
    .hero-badge {
      position: absolute;
      bottom: -16px;
      right: -16px;
      background: var(--white);
      border-radius: 16px;
      padding: 16px 24px;
      box-shadow: var(--shadow-card);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .badge-number {
      font-family: var(--font-number);
      font-weight: 700;
      font-size: 2.4rem;
      color: var(--accent);
      line-height: 1;
    }
    .badge-label {
      font-size: 0.9rem;
      color: var(--gray-text);
      font-weight: 500;
    }

    /* 通用标题 */
    .section-title {
      font-size: clamp(1.8rem, 4vw, 2.4rem);
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 16px;
      text-align: center;
    }
    .section-subtitle {
      color: var(--gray-text);
      text-align: center;
      max-width: 640px;
      margin: 0 auto 48px;
      font-size: 1.05rem;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .pain-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      flex: 1 1 260px;
      max-width: 360px;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .pain-icon {
      font-size: 2.4rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    /* 解决方案卡片 */
    .solution-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .solution-card {
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      flex: 1 1 300px;
      max-width: 380px;
      display: flex;
      flex-direction: column;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .solution-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .solution-body {
      padding: 28px 24px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      font-family: var(--font-number);
      font-size: 1.3rem;
      padding: 10px 18px;
      border-radius: 30px;
      margin-top: auto;
      align-self: flex-start;
    }

    /* 成果数据 */
    .outcome-grid {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      justify-content: center;
      text-align: center;
    }
    .outcome-item {
      flex: 1 1 160px;
      max-width: 220px;
      padding: 24px 16px;
      background: var(--white);
      border-radius: var(--radius-inner);
      box-shadow: var(--shadow-card);
      transition: transform 0.2s;
    }
    .outcome-item:hover { transform: translateY(-3px); }
    .outcome-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 证言 */
    .testimonial-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .testimonial-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 36px 28px;
      box-shadow: var(--shadow-card);
      flex: 1 1 300px;
      max-width: 380px;
      position: relative;
    }
    .testimonial-card::before {
      content: "“";
      font-size: 5rem;
      color: var(--primary-light);
      position: absolute;
      top: -8px;
      left: 20px;
      line-height: 1;
    }

    /* 流程 */
    .process-steps {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .step-item {
      flex: 1 1 200px;
      max-width: 240px;
      text-align: center;
    }
    .step-circle {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      background: var(--primary);
      color: white;
      font-weight: 700;
      font-size: 1.8rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* FAQ */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-inner);
      margin-bottom: 12px;
      box-shadow: 0 1px 6px rgba(0,0,0,0.03);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 18px 24px;
      text-align: left;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--secondary);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--gray-text);
      display: none;
    }
    .faq-item.open .faq-answer { display: block; }
    .faq-icon { transition: transform 0.25s; }
    .faq-item.open .faq-icon { transform: rotate(45deg); }

    /* CTA */
    #cta {
      background: linear-gradient(135deg, #E8734A 0%, #D4A843 100%);
      color: white;
      text-align: center;
      padding: 80px 24px;
      border-radius: 0;
    }

    /* 页脚 */
    .footer {
      background: #2D2A26;
      color: #FBF7F2;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      justify-content: space-between;
    }
    .footer a { color: #ccc; text-decoration: none; }
    .footer a:hover { color: var(--primary); }

    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; text-align: center; }
      .hero-text .subtitle { margin: 0 auto 36px; }
      .btn-group { justify-content: center; }
      .hero-badge { position: static; margin-top: 16px; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; flex-direction: column; background: white; position: absolute; top: 70px; left: 10px; right: 10px; border-radius: 30px; padding: 16px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
      .nav-links.active { display: flex; }
      .menu-toggle { display: block; }
      section { padding: 60px 0; }
    }