/* roulang page: index */
:root {
      --deep-bg: #0A0E27;
      --card-bg: rgba(20, 24, 51, 0.85);
      --accent-red: #E62E2E;
      --accent-red-hover: #FF4747;
      --energy-cyan: #00F0FF;
      --energy-cyan-15: rgba(0, 240, 255, 0.15);
      --energy-cyan-40: rgba(0, 240, 255, 0.4);
      --gray-text: #B0B3C1;
      --light-bg: #F5F5F7;
      --white: #FFFFFF;
      --border-light: rgba(0, 240, 255, 0.15);
      --border-medium: rgba(0, 240, 255, 0.2);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow-red: 0 0 20px rgba(230, 46, 46, 0.5);
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-number: 'DIN Alternate', 'Bebas Neue', 'Rajdhani', sans-serif;
      --border-radius-lg: 16px;
      --border-radius-md: 12px;
      --border-radius-sm: 8px;
      --section-gap: 100px;
      --container-max: 1200px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--deep-bg);
      color: var(--gray-text);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--white);
      margin-bottom: 1rem;
    }
    
    h1 {
      font-size: 48px;
      font-weight: 700;
    }
    
    h2 {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    
    h3 {
      font-size: 22px;
      font-weight: 500;
    }
    
    p {
      margin-bottom: 1.2rem;
      color: var(--gray-text);
    }
    
    a {
      color: var(--energy-cyan);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--white);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: var(--container-max);
      padding-left: 20px;
      padding-right: 20px;
      margin: 0 auto;
    }
    
    /* 导航 - 悬浮胶囊 */
    .navbar-custom {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1050;
      width: auto;
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: blur(12px);
      border-radius: 40px;
      padding: 8px 28px;
      border: 1px solid var(--border-medium);
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    
    .nav-logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--energy-cyan);
      margin-right: 28px;
      letter-spacing: 1px;
    }
    
    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
      flex-wrap: wrap;
    }
    
    .nav-link-item {
      color: var(--gray-text);
      font-size: 14px;
      font-weight: 500;
      text-decoration: none;
      padding: 4px 6px;
      transition: color 0.2s;
      position: relative;
      white-space: nowrap;
    }
    
    .nav-link-item:hover,
    .nav-link-item.active {
      color: var(--energy-cyan);
    }
    
    .nav-link-item.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 6px;
      right: 6px;
      height: 2px;
      background-color: var(--energy-cyan);
    }
    
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--white);
      font-size: 1.8rem;
      cursor: pointer;
    }
    
    /* Hero */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      padding-top: 100px;
      padding-bottom: 50px;
    }
    
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 30%, rgba(0,240,255,0.08) 0%, rgba(10,14,39,0.85) 80%);
      z-index: 1;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 650px;
    }
    
    .hero-highlight {
      color: var(--energy-cyan);
      font-weight: 700;
    }
    
    .hero-subtitle {
      font-size: 20px;
      color: var(--gray-text);
      margin-bottom: 2.5rem;
    }
    
    .btn-primary-custom {
      background: var(--accent-red);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 40px;
      font-size: 16px;
      transition: all 0.25s;
      box-shadow: 0 4px 12px rgba(230,46,46,0.3);
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-primary-custom:hover {
      background: var(--accent-red-hover);
      box-shadow: var(--shadow-glow-red);
      color: white;
      transform: translateY(-2px);
    }
    
    .btn-outline-cyan {
      background: transparent;
      border: 1.5px solid var(--energy-cyan);
      color: var(--energy-cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 40px;
      font-size: 16px;
      transition: all 0.25s;
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-outline-cyan:hover {
      background: var(--energy-cyan-15);
      border-color: var(--energy-cyan);
      color: var(--energy-cyan);
      box-shadow: 0 0 14px rgba(0,240,255,0.3);
    }
    
    /* 通用板块 */
    .section-block {
      padding: var(--section-gap) 0;
    }
    
    .section-title {
      margin-bottom: 48px;
    }
    
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--border-radius-md);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s, border-color 0.2s, box-shadow 0.2s;
      height: 100%;
    }
    
    .card-custom:hover {
      transform: translateY(-6px);
      border-color: var(--energy-cyan-40);
      box-shadow: 0 12px 36px rgba(0,0,0,0.6);
    }
    
    /* 痛点区 */
    .pain-point-item {
      background: rgba(20,24,51,0.6);
      border-left: 4px solid var(--accent-red);
      padding: 28px;
      border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    }
    
    /* 解决方案卡片 */
    .solution-icon {
      font-size: 2.4rem;
      color: var(--energy-cyan);
      margin-bottom: 20px;
    }
    
    /* 数据区 */
    .stat-number {
      font-family: var(--font-number);
      font-size: 58px;
      font-weight: 700;
      color: var(--energy-cyan);
      line-height: 1.1;
    }
    
    /* 证言 */
    .testimonial-card {
      background: #F5F5F7;
      color: #1a1a2e;
      border-radius: var(--border-radius-md);
      padding: 28px;
      border-left: 6px solid var(--accent-red);
    }
    
    .avatar-placeholder {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #ccc;
      overflow: hidden;
    }
    
    /* FAQ 手风琴覆盖 */
    .accordion-button {
      background-color: rgba(20,24,51,0.9) !important;
      color: white !important;
      font-weight: 500;
      border: 1px solid var(--border-light);
    }
    
    .accordion-button:not(.collapsed) {
      background-color: rgba(0,240,255,0.1) !important;
      border-color: var(--energy-cyan);
      color: var(--energy-cyan) !important;
    }
    
    .accordion-item {
      background: transparent;
      border: 1px solid var(--border-light);
      margin-bottom: 12px;
      border-radius: var(--border-radius-sm);
      overflow: hidden;
    }
    
    .accordion-body {
      background: rgba(10,14,39,0.7);
      color: var(--gray-text);
    }
    
    /* CTA 区 */
    .cta-full {
      background: linear-gradient(135deg, #141833 0%, #0A0E27 100%);
      border-top: 2px solid var(--energy-cyan);
      border-bottom: 2px solid var(--energy-cyan);
    }
    
    /* 页脚 */
    .footer-custom {
      background: #0A0E27;
      border-top: 2px solid var(--energy-cyan);
      padding: 50px 0 20px;
      color: var(--gray-text);
    }
    
    @media (max-width: 992px) {
      h1 { font-size: 38px; }
      .navbar-custom { width: 95%; padding: 8px 16px; }
      .nav-links { gap: 12px; }
    }
    
    @media (max-width: 768px) {
      .navbar-custom {
        justify-content: space-between;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 20px;
        right: 20px;
        background: rgba(10,14,39,0.95);
        backdrop-filter: blur(12px);
        border-radius: 24px;
        flex-direction: column;
        padding: 20px;
        border: 1px solid var(--border-medium);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-section {
        text-align: center;
      }
      .hero-content {
        margin: 0 auto;
      }
    }
    
    @media (max-width: 576px) {
      h1 { font-size: 30px; }
      h2 { font-size: 26px; }
      .btn-primary-custom, .btn-outline-cyan {
        padding: 12px 24px;
        font-size: 15px;
        display: block;
        width: 100%;
        margin-bottom: 10px;
      }
    }