/* roulang page: index */
:root {
      --primary-red: #E8313A;
      --secondary-dark: #1A1A2E;
      --accent-gold: #F0C040;
      --bg-deep: #0D0D1A;
      --card-bg: #16162B;
      --text-white: #FFFFFF;
      --text-light-gray: #B0B0C0;
      --border-red-opacity: rgba(231,49,58,0.2);
      --shadow-red: 0 4px 24px rgba(231,49,58,0.15);
      --shadow-red-hover: 0 8px 40px rgba(231,49,58,0.35);
      --radius-card: 12px;
      --radius-button: 8px;
      --font-mono: 'Rajdhani', 'Orbitron', sans-serif;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-smooth: all 0.25s ease-in-out;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-light-gray);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    /* 自定义滚动条 */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: var(--secondary-dark);
    }
    ::-webkit-scrollbar-thumb {
      background: var(--primary-red);
      border-radius: 3px;
    }

    /* 容器、栅格与留白 */
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
      width: 100%;
    }

    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    /* 背景动态斜切网格装饰 */
    .bg-grid-pattern {
      position: relative;
      background-color: var(--bg-deep);
    }
    .bg-grid-pattern::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(231,49,58,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(231,49,58,0.08) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      opacity: 0.5;
    }

    /* 导航样式 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(13,13,26,0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 50;
      transition: background 0.3s ease;
      border-bottom: 1px solid rgba(231,49,58,0.25);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--text-white);
      letter-spacing: 1px;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      color: var(--primary-red);
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-light-gray);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      transition: color 0.2s;
      padding: 4px 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-red);
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-red);
      transition: width 0.25s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .btn-outline-nav {
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 600;
      transition: 0.2s;
      text-decoration: none;
    }
    .btn-outline-nav:hover {
      background: rgba(240,192,64,0.1);
    }

    /* 移动端菜单 */
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-white);
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(13,13,22,0.98);
        backdrop-filter: blur(24px);
        padding: 30px 20px;
        gap: 24px;
        border-bottom: 1px solid var(--primary-red);
        box-shadow: 0 10px 25px rgba(0,0,0,0.6);
      }
    }

    /* Hero 区域 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 20% 20%, #1f1f3a, #0D0D1A 80%);
      position: relative;
      overflow: hidden;
      padding-top: 90px;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-white);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--accent-gold);
    }
    .hero-desc {
      font-size: 1.2rem;
      color: #ccccdd;
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-visual {
      flex: 1;
      position: relative;
    }
    .hero-img {
      width: 100%;
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(231,49,58,0.25);
      border: 1px solid rgba(240,192,64,0.2);
    }
    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-title {
        font-size: 2.4rem;
      }
      .hero-buttons {
        justify-content: center;
      }
    }

    /* 按钮组件 */
    .btn-primary {
      background: var(--primary-red);
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      text-decoration: none;
      display: inline-block;
      transition: background 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      background: #C72830;
      box-shadow: 0 0 18px rgba(231,49,58,0.6);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      text-decoration: none;
      transition: 0.2s;
    }
    .btn-secondary:hover {
      background: rgba(240,192,64,0.08);
    }

    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid var(--border-red-opacity);
      box-shadow: var(--shadow-red);
      transition: var(--transition-smooth);
    }
    .card:hover {
      box-shadow: var(--shadow-red-hover);
      transform: translateY(-4px);
      border-color: rgba(240,192,64,0.4);
    }

    /* 痛点卡片红色竖线 */
    .pain-card {
      border-left: 3px solid var(--primary-red);
    }
    .pain-card:hover {
      border-left-color: var(--accent-gold);
    }

    /* 数据指标数字 */
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: var(--card-bg);
      border-radius: 10px;
      margin-bottom: 12px;
      border: 1px solid var(--border-red-opacity);
      overflow: hidden;
    }
    .faq-question {
      background: #1A1A2E;
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-white);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #0f0f20;
      color: #ccc;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 20px 24px;
    }
    .faq-item.active {
      border-color: var(--primary-red);
    }

    /* 证言卡片装饰 */
    .testimonial-card {
      border-left: 4px solid var(--accent-gold);
      background: #16162B;
    }

    footer {
      background: #0b0b16;
      border-top: 1px solid var(--primary-red);
    }

@keyframes countPulse { 0%{transform:scale(1);} 50%{transform:scale(1.05); color:#F0C040;} 100%{transform:scale(1);} }
    @keyframes bounce { 0%,100%{transform:translateY(0);} 50%{transform:translateY(10px);} }
    .snap-x::-webkit-scrollbar { height:4px; }
    .snap-x::-webkit-scrollbar-thumb { background:var(--primary-red); border-radius:4px; }