/* roulang page: index */
:root {
      --primary: #E94057;
      --primary-hover: #C83045;
      --secondary: #0A0E27;
      --accent: #F0E6D2;
      --bg-light: #FAFAFC;
      --bg-dark: #0A0E27;
      --card-dark: #141A33;
      --text-main: #1A1A2E;
      --text-muted: #5B5B7A;
      --text-light: #FFFFFF;
      --font-heading: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif;
      --font-mono: 'Rajdhani', 'Orbitron', monospace;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-card: 0 4px 24px rgba(10,14,39,0.08);
      --shadow-hover: 0 12px 32px rgba(233,64,87,0.18);
      --border-dark-card: 1px solid rgba(240,230,210,0.12);
      --transition: all 0.25s ease;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10,14,39,0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(240,230,210,0.18);
      transition: background 0.3s ease;
    }
    #header.scrolled {
      background: rgba(10,14,39,0.98);
      border-bottom: 1px solid var(--accent);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 24px;
      letter-spacing: 1px;
      color: var(--accent);
      text-transform: uppercase;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 15px;
      transition: var(--transition);
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent);
    }
    .nav-cta {
      background: var(--primary);
      color: white;
      padding: 10px 22px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
      letter-spacing: 0.5px;
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      transform: scale(1.03);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 4px;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
      display: block;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--secondary);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      z-index: 999;
      transform: translateX(100%);
      transition: transform 0.35s ease;
      list-style: none;
    }
    .mobile-menu.open { transform: translateX(0); }
    .mobile-menu a {
      color: white;
      font-size: 22px;
      font-weight: 600;
      letter-spacing: 1px;
    }
    /* Hero */
    #hero {
      padding: 140px 0 80px;
      background: radial-gradient(circle at 20% 30%, #1A1A3E 0%, #0A0E27 90%);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .hero-left h1 {
      font-family: var(--font-heading);
      font-size: 56px;
      font-weight: 700;
      letter-spacing: -1.5px;
      color: white;
      line-height: 1.15;
      margin-bottom: 20px;
    }
    .hero-left h1 span { color: var(--primary); }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 36px;
      max-width: 480px;
    }
    .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-primary:hover { background: var(--primary-hover); transform: scale(1.03); }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-secondary:hover { background: var(--primary); color: white; }
    .hero-panel {
      background: rgba(20,26,51,0.85);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(240,230,210,0.25);
      border-radius: 16px;
      padding: 24px;
      color: white;
    }
    .score-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .team { font-size: 22px; font-weight: 600; }
    .live-badge {
      background: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
    }
    /* 板块通用 */
    section { padding: 80px 0; }
    .section-title {
      font-family: var(--font-heading);
      font-size: 40px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .section-sub {
      color: var(--text-muted);
      margin-bottom: 40px;
      font-size: 18px;
    }
    .dark-bg { background: var(--bg-dark); color: white; }
    .dark-bg .section-title { color: white; }
    /* 痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--card-dark);
      border-left: 3px solid var(--primary);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .pain-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .pain-icon { font-size: 28px; color: var(--accent); margin-bottom: 16px; }
    .pain-card h3 { font-size: 20px; margin-bottom: 10px; color: white; }
    /* solutions 交错 */
    .solution-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 60px;
    }
    .solution-img {
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      min-height: 280px;
      border-radius: 16px;
      position: relative;
      overflow: hidden;
    }
    .solution-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10,14,39,0.7) 0%, rgba(233,64,87,0.3) 100%);
    }
    .solution-text h3 { font-size: 28px; margin-bottom: 16px; }
    /* results */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .stat-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      background: linear-gradient(135deg, #E94057, #F0E6D2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    /* testimonials 横向滚动 */
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }
    .testimonial-card {
      min-width: 280px;
      background: white;
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.04);
      border-left: 3px solid var(--primary);
    }
    .user-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
    .avatar {
      width: 44px; height: 44px;
      background: url('/assets/images/coverpic/cover-1.webp') center/cover;
      border-radius: 50%;
    }
    /* faq */
    .faq-item {
      border-bottom: 1px solid rgba(10,14,39,0.1);
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer { max-height: 0; overflow: hidden; transition: 0.3s; color: var(--text-muted); }
    .faq-item.active .faq-answer { max-height: 200px; margin-top: 12px; }
    /* cta */
    #cta {
      background: linear-gradient(135deg, #0A0E27, #1A1A3E);
      text-align: center;
    }
    .cta-button {
      background: linear-gradient(135deg, #E94057, #F05A6F);
      padding: 18px 42px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 18px;
      color: white;
      display: inline-block;
      margin-top: 24px;
      box-shadow: 0 0 20px rgba(233,64,87,0.5);
    }
    /* footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 60px 0 40px;
      color: #ccc;
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      text-align: center;
      color: var(--text-muted);
    }
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .pain-grid, .stats-grid { grid-template-columns: repeat(2,1fr); }
      .solution-row { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-left h1 { font-size: 36px; }
      .pain-grid, .stats-grid { grid-template-columns: 1fr; }
    }