/* roulang page: index */
:root {
      --primary: #00E5A0;
      --primary-hover: #00C78C;
      --bg-deep: #1A1A2E;
      --bg-card: #16213E;
      --accent: #FF6B35;
      --text-body: #E8ECF1;
      --text-white: #FFFFFF;
      --text-muted: #8B95A5;
      --glass-bg: rgba(22, 33, 62, 0.55);
      --glass-border: rgba(0, 229, 160, 0.15);
      --glow-sm: 0 0 15px rgba(0, 229, 160, 0.4);
      --glow-md: 0 0 25px rgba(0, 229, 160, 0.6);
      --radius-card: 16px;
      --radius-btn: 50px;
      --sidebar-width: 230px;
      --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-body);
      margin: 0;
      line-height: 1.75;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    h1, h2, h3, h4 {
      color: var(--text-white);
      font-weight: 700;
    }
    /* 左侧竖向导航 (桌面) */
    .sidebar {
      position: fixed;
      left: 0;
      top: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background: rgba(26, 26, 46, 0.85);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border-right: 1px solid;
      border-image: linear-gradient(to bottom, rgba(0,229,160,0.35), transparent) 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2rem 1.2rem;
      z-index: 1040;
      transition: transform 0.3s ease;
    }
    .logo-area {
      margin-bottom: 2.5rem;
      text-align: center;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--primary);
      text-shadow: 0 0 12px rgba(0,229,160,0.7);
      line-height: 1.2;
    }
    .logo-sub {
      font-size: 0.7rem;
      color: var(--text-muted);
      letter-spacing: 1px;
      margin-top: 4px;
    }
    .nav-menu {
      flex: 1;
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
      margin-top: 1rem;
    }
    .nav-item {
      position: relative;
      padding: 0.7rem 1rem 0.7rem 1.8rem;
      font-weight: 500;
      color: var(--text-muted);
      border-left: 3px solid transparent;
      transition: all 0.25s;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
    }
    .nav-item:hover,
    .nav-item.active {
      color: var(--primary);
      border-left-color: var(--primary);
      text-shadow: 0 0 8px rgba(0,229,160,0.5);
      background: linear-gradient(90deg, rgba(0,229,160,0.08), transparent);
    }
    .social-side {
      margin-top: auto;
      display: flex;
      gap: 1rem;
      font-size: 1.2rem;
      color: var(--text-muted);
    }
    .social-side a:hover {
      color: var(--primary);
      text-shadow: 0 0 10px var(--primary);
    }
    /* 移动端顶部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      width: 100%;
      height: 60px;
      background: rgba(26, 26, 46, 0.9);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 1050;
      align-items: center;
      justify-content: space-between;
      padding: 0 1.5rem;
      border-bottom: 1px solid rgba(0,229,160,0.2);
    }
    .hamburger {
      font-size: 1.6rem;
      color: var(--primary);
      background: none;
      border: none;
    }
    .mobile-menu-panel {
      position: fixed;
      top: 60px;
      left: 0;
      width: 100%;
      background: rgba(10, 10, 26, 0.95);
      backdrop-filter: blur(25px);
      padding: 1.5rem;
      display: none;
      flex-direction: column;
      gap: 0.8rem;
      z-index: 1045;
    }
    .mobile-menu-panel a {
      color: var(--text-body);
      font-weight: 500;
      padding: 0.6rem 1rem;
      border-left: 3px solid transparent;
    }
    .mobile-menu-panel a:hover {
      color: var(--primary);
      border-left-color: var(--primary);
    }
    /* 主内容区偏移 */
    .main-content {
      margin-left: var(--sidebar-width);
      width: calc(100% - var(--sidebar-width));
      position: relative;
    }
    /* 通用区块 */
    section {
      padding: clamp(80px, 10vh, 120px) 0;
      position: relative;
      overflow: hidden;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 2rem;
    }
    .section-title {
      font-size: clamp(2rem, 4vw, 2.8rem);
      font-weight: 700;
      letter-spacing: -0.01em;
      margin-bottom: 1.5rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 0;
      width: 60px;
      height: 3px;
      background: var(--primary);
      box-shadow: 0 0 15px var(--primary);
      border-radius: 2px;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: 0 8px 32px rgba(0,0,0,0.4);
      transition: all 0.35s ease;
    }
    .glass-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 40px rgba(0,229,160,0.25);
      border-color: rgba(0,229,160,0.4);
    }
    .btn-primary-glow {
      background: var(--primary);
      color: #1A1A2E;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      border: none;
      box-shadow: 0 0 20px rgba(0,229,160,0.5);
      transition: all 0.3s ease;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .btn-primary-glow:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 35px rgba(0,229,160,0.8);
      transform: translateY(-2px);
      color: #0a0a1a;
    }
    .btn-outline-glow {
      background: transparent;
      color: var(--primary);
      border: 2px solid rgba(0,229,160,0.5);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s;
    }
    .btn-outline-glow:hover {
      border-color: var(--primary);
      background: rgba(0,229,160,0.08);
      box-shadow: 0 0 15px rgba(0,229,160,0.3);
      color: var(--primary);
    }
    /* Hero区域 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 20% 30%, rgba(0,229,160,0.06) 0%, transparent 50%);
      position: relative;
    }
    .hero-grid-bg {
      position: absolute;
      inset: 0;
      background-image: radial-gradient(rgba(0,229,160,0.08) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }
    .floating-cards {
      position: absolute;
      right: 5%;
      bottom: 15%;
      display: flex;
      gap: 1.5rem;
      animation: float 4s ease-in-out infinite;
    }
    @keyframes float {
      0%,100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }
    .stat-mini {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      padding: 1rem 1.5rem;
      border-radius: 14px;
      border: 1px solid var(--glass-border);
      text-align: center;
    }
    .stat-num {
      font-family: var(--font-mono);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    /* 痛点区 */
    .pain-quote {
      font-size: 2rem;
      font-weight: 600;
      color: var(--text-muted);
      opacity: 0.7;
    }
    /* FAQ 手风琴重写 */
    .accordion-button {
      background: rgba(22,33,62,0.4);
      color: var(--text-white);
      font-weight: 600;
      border-left: 3px solid var(--text-muted);
      border-radius: 0 !important;
      box-shadow: none;
      padding: 1.2rem 1.8rem;
      transition: 0.3s;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(0,229,160,0.08);
      border-left-color: var(--primary);
      box-shadow: 0 0 18px rgba(0,229,160,0.4);
      color: var(--primary);
    }
    .accordion-body {
      background: rgba(22,33,62,0.25);
      color: var(--text-body);
      padding: 1.5rem 1.8rem;
    }
    .accordion-item {
      border: none;
      margin-bottom: 1rem;
      background: transparent;
    }
    /* 页脚 */
    .footer-top {
      border-top: 1px solid rgba(0,229,160,0.3);
      background: #0F0F1A;
    }
    /* 响应式 */
    @media (max-width: 992px) {
      .sidebar {
        display: none;
      }
      .mobile-nav {
        display: flex;
      }
      .main-content {
        margin-left: 0;
        width: 100%;
        padding-top: 60px;
      }
      .floating-cards {
        position: static;
        justify-content: center;
        margin-top: 2rem;
        flex-wrap: wrap;
      }
    }

@keyframes pulse-glow {
      0% { box-shadow: 0 0 15px rgba(0,229,160,0.6); }
      50% { box-shadow: 0 0 35px rgba(0,229,160,0.9); }
      100% { box-shadow: 0 0 15px rgba(0,229,160,0.6); }
    }