/* roulang page: index */
:root {
      --primary: #E53935;
      --primary-dark: #C62828;
      --secondary: #1E1E2F;
      --accent: #FFB300;
      --bg-light: #F5F6FA;
      --text-main: #1A1A1A;
      --text-soft: #5A5A5A;
      --white: #FFFFFF;
      --card-shadow: 0 8px 30px rgba(0,0,0,0.05);
      --card-shadow-hover: 0 18px 36px rgba(0,0,0,0.11);
      --radius-lg: 20px;
      --radius-btn: 40px;
      --radius-sm: 12px;
      --transition: all 0.25s ease;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
      --font-number: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

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

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

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

    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 28px;
    }

    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      z-index: 50;
      transition: box-shadow 0.3s;
      box-shadow: 0 1px 10px rgba(0,0,0,0.02);
    }

    #nav.scrolled {
      box-shadow: 0 8px 26px rgba(0,0,0,0.08);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: 0.5px;
      color: var(--primary);
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .logo span {
      color: var(--secondary);
      font-weight: 600;
      font-size: 1.2rem;
      margin-left: 6px;
      letter-spacing: 0.2px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-main);
      font-size: 0.95rem;
      transition: var(--transition);
      position: relative;
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .nav-cta {
      background: linear-gradient(135deg, #E53935 0%, #FF6F00 100%);
      color: white !important;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 6px 18px rgba(229,57,53,0.3);
      transition: var(--transition);
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(229,57,53,0.4);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
    }

    .hamburger span {
      width: 24px;
      height: 2.5px;
      background: var(--text-main);
      border-radius: 4px;
      transition: 0.3s;
    }

    /* 首屏 */
    #hero {
      background: var(--secondary);
      position: relative;
      overflow: hidden;
      padding: 130px 0 90px;
      color: white;
    }

    .hero-bg-glow {
      position: absolute;
      top: -180px;
      right: -120px;
      width: 700px;
      height: 700px;
      background: radial-gradient(circle, rgba(229,57,53,0.45) 0%, rgba(30,30,47,0) 70%);
      pointer-events: none;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
    }

    .hero-left {
      flex: 1 1 55%;
    }

    .hero-left h1 {
      font-size: clamp(2.2rem, 5.5vw, 3.6rem);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .hero-left .sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
      max-width: 520px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #E53935 0%, #FF6F00 100%);
      border: none;
      color: white;
      font-weight: 600;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      cursor: pointer;
      display: inline-block;
      box-shadow: 0 12px 28px rgba(229,57,53,0.45);
      transition: var(--transition);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 36px rgba(229,57,53,0.55);
    }

    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 28px;
      margin-top: 30px;
    }

    .badge {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,179,0,0.35);
      border-radius: 20px;
      padding: 20px 24px;
      min-width: 140px;
      animation: float 5s infinite alternate ease-in-out;
    }

    @keyframes float {
      0% { transform: translateY(0); }
      100% { transform: translateY(-8px); }
    }

    .badge-num {
      font-family: var(--font-number);
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }

    .badge-label {
      font-size: 0.9rem;
      color: rgba(255,255,255,0.8);
    }

    .hero-right {
      flex: 0 0 280px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    /* 痛点 */
    #pain-points {
      padding: 90px 0 70px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

    .dark-card {
      background: #2A2A3A;
      border-radius: var(--radius-lg);
      padding: 28px;
      border-left: 5px solid var(--primary);
      color: #ddd;
    }

    .dark-card h3 {
      color: white;
      margin-bottom: 12px;
    }

    /* 解决方案 */
    #solutions {
      padding: 80px 0;
      background: white;
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .solution-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.02);
    }

    .solution-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--card-shadow-hover);
    }

    .card-icon {
      height: 60px;
      width: 60px;
      background: rgba(229,57,53,0.08);
      border-radius: 18px;
      margin-bottom: 22px;
      background-image: url('/assets/images/coverpic/cover-1.webp');
      background-size: cover;
      background-position: center;
    }

    /* 成果数据 */
    #results {
      background: var(--secondary);
      padding: 70px 0;
      color: white;
    }

    .badge-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 32px;
      margin-top: 35px;
    }

    .stat-badge {
      background: rgba(255,255,255,0.04);
      border: 1.5px solid var(--accent);
      border-radius: 28px;
      padding: 28px 36px;
      text-align: center;
    }

    /* 证言 */
    #testimonials {
      padding: 80px 0;
    }

    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .testimonial-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 28px;
      display: flex;
      gap: 18px;
      align-items: flex-start;
      box-shadow: var(--card-shadow);
    }

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

    /* FAQ */
    #faq {
      padding: 80px 0;
      background: white;
    }

    .faq-item {
      border-bottom: 1px solid #eee;
      padding: 22px 0;
      cursor: pointer;
    }

    .faq-question {
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
    }

    .faq-answer {
      color: var(--text-soft);
      margin-top: 8px;
      display: none;
    }

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

    /* 终局 CTA */
    #final-cta {
      background: linear-gradient(135deg, #E53935 0%, #FF6F00 100%);
      padding: 80px 0;
      text-align: center;
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 18px;
    }

    footer {
      background: var(--secondary);
      color: #ccc;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 30px;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-grid { flex-direction: column; }
      .footer-grid { flex-direction: column; }
    }