/* roulang page: index */
:root {
      --primary: #00E676;
      --primary-dark: #00c853;
      --secondary: #1A1A2E;
      --accent: #FF1744;
      --text-light: #F5F5F5;
      --text-dark: #212121;
      --bg-light: #FAFAFA;
      --card-bg: #FFFFFF;
      --border-light: rgba(255,255,255,0.15);
      --border-dark: rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 50px;
      --shadow-card: 0 8px 20px rgba(0,0,0,0.02), 0 2px 6px rgba(0,0,0,0.04);
      --shadow-glow: 0 0 18px rgba(0,230,118,0.35);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
      --spacing-xs: 8px;
      --spacing-sm: 16px;
      --spacing-md: 24px;
      --spacing-lg: 40px;
      --spacing-xl: 64px;
      --spacing-2xl: 96px;
      --navbar-height: 72px;
      --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--navbar-height);
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 var(--spacing-md);
    }
    @media (min-width: 1400px) {
      .container {
        max-width: 1320px;
      }
    }

    /* 导航栏 SaaS 命令栏风格 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--navbar-height);
      background: rgba(26,26,46,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: background var(--transition), box-shadow var(--transition);
    }
    .navbar.scrolled {
      background: rgba(10,10,20,0.92);
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }
    .navbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.5px;
      z-index: 1001;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2"><polygon points="12,2 22,8.5 22,15.5 12,22 2,15.5 2,8.5"/></svg>') center/contain no-repeat;
      -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2"><polygon points="12,2 22,8.5 22,15.5 12,22 2,15.5 2,8.5"/></svg>') center/contain no-repeat;
      background: var(--primary);
      display: inline-block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      text-decoration: none;
      color: rgba(245,245,245,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
      transition: color var(--transition);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      z-index: 1001;
    }
    .search-box {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-full);
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: rgba(245,245,245,0.7);
      font-size: 0.9rem;
      width: 180px;
      transition: all var(--transition);
    }
    .search-box i {
      font-size: 0.9rem;
      color: rgba(245,245,245,0.5);
    }
    .search-box input {
      background: transparent;
      border: none;
      color: white;
      outline: none;
      width: 100%;
      font-size: 0.9rem;
    }
    .search-box input::placeholder {
      color: rgba(245,245,245,0.4);
    }
    .btn-login {
      color: rgba(245,245,245,0.9);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color var(--transition);
    }
    .btn-login:hover {
      color: var(--primary);
    }
    .btn-primary-nav {
      background: var(--primary);
      color: #1A1A2E;
      border: none;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 0.95rem;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary-nav:hover {
      background: #00ff84;
      box-shadow: var(--shadow-glow);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
      z-index: 1002;
      padding: 4px;
    }
    @media (max-width: 1024px) {
      .nav-links {
        gap: 18px;
      }
      .search-box {
        width: 140px;
      }
    }
    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(10,10,22,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
      }
      .nav-links.active {
        transform: translateY(0);
      }
      .nav-links a {
        font-size: 1.3rem;
      }
      .nav-actions .search-box {
        display: none;
      }
      .nav-actions .btn-login {
        display: none;
      }
    }

    /* Hero */
    .hero {
      background: var(--secondary);
      background-image: radial-gradient(circle at 30% 40%, rgba(0,230,118,0.08) 0%, transparent 50%),
                        linear-gradient(135deg, #1A1A2E 0%, #0F0F1A 100%);
      position: relative;
      overflow: hidden;
      padding: calc(var(--navbar-height) + 80px) 0 100px;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 20%;
      right: 10%;
      width: 500px;
      height: 500px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      border-radius: 50%;
      filter: blur(40px);
      z-index: 0;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: clamp(2.4rem, 5vw, 3.4rem);
      font-weight: 800;
      line-height: 1.2;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-content p {
      font-size: 1.15rem;
      color: rgba(245,245,245,0.8);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-hero-primary {
      background: var(--primary);
      color: #1A1A2E;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
    }
    .btn-hero-primary:hover {
      background: #00ff84;
      box-shadow: 0 0 24px rgba(0,230,118,0.5);
      transform: translateY(-2px);
    }
    .btn-hero-secondary {
      background: transparent;
      border: 1.5px solid rgba(245,245,245,0.7);
      color: #FFFFFF;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1.05rem;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
    }
    .btn-hero-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .hero-visual {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero-img {
      width: 100%;
      max-width: 500px;
      aspect-ratio: 1/1;
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      border: 1px solid rgba(255,255,255,0.1);
      position: relative;
      z-index: 2;
    }
    .data-overlay {
      position: absolute;
      bottom: -20px;
      right: -20px;
      background: rgba(0,0,0,0.7);
      backdrop-filter: blur(8px);
      padding: 16px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      color: white;
      font-family: var(--font-mono);
      z-index: 5;
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-content p {
        margin-left: auto;
        margin-right: auto;
      }
      .hero-buttons {
        justify-content: center;
      }
      .hero-img {
        max-width: 320px;
        margin-top: 24px;
      }
    }

    /* 通用区块 */
    section {
      padding: var(--spacing-2xl) 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--secondary);
    }
    .section-sub {
      font-size: 1.1rem;
      color: #555;
      margin-bottom: 48px;
    }

    /* 核心价值 非对称栅格 */
    .values-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 32px;
    }
    .value-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: all var(--transition);
    }
    .value-card:hover {
      background: white;
      box-shadow: var(--shadow-card);
      border-color: rgba(0,230,118,0.2);
    }
    .value-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    @media (max-width: 768px) {
      .values-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 功能分组 左右交替 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .feature-row.reverse {
      flex-direction: row-reverse;
    }
    .feature-text {
      flex: 1;
    }
    .feature-img {
      flex: 1;
      background: #eee;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      aspect-ratio: 4/3;
    }
    .feature-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    @media (max-width: 768px) {
      .feature-row, .feature-row.reverse {
        flex-direction: column;
      }
    }

    /* 场景卡片横向滚动 */
    .scenarios-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
    }
    .scenario-card {
      min-width: 280px;
      background: white;
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      border-left: 5px solid var(--primary);
    }

    /* 数据深色区块 */
    .stats-dark {
      background: var(--secondary);
      color: white;
      text-align: center;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
      margin-top: 40px;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-sm);
      padding: 20px;
      cursor: pointer;
      box-shadow: var(--shadow-card);
    }
    @media (max-width: 768px) {
      .faq-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr; }
    }

    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, #0F0F1A, #1A1A2E);
      color: white;
      text-align: center;
      padding: 80px 0;
    }
    .cta-input-group {
      display: flex;
      max-width: 480px;
      margin: 32px auto 0;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .cta-input-group input {
      flex: 1;
      padding: 14px;
      border-radius: var(--radius-sm);
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
    }

    footer {
      background: #0A0A14;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }