/* roulang page: index */
:root {
      --primary: #00E5A0;
      --primary-dark: #00C78C;
      --secondary: #1A0033;
      --dark-blue: #0B1D3A;
      --bg-deep: #0A0F1A;
      --card-bg: rgba(255,255,255,0.03);
      --border-light: rgba(0,229,160,0.15);
      --text-light: #E0E6F0;
      --text-muted: #8892A4;
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow-glow: 0 0 20px rgba(0,229,160,0.25);
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'Inter', 'MiSans', 'PingFang SC', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      background: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 导航 */
    .top-bar {
      background: rgba(10,15,26,0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 2px solid var(--primary);
      padding: 0.75rem 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      transition: background 0.3s;
    }
    .top-bar.scrolled {
      background: rgba(8,12,22,0.96);
    }
    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }
    .logo span {
      color: var(--primary);
      text-shadow: 0 0 10px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-links a {
      color: #ccd6e0;
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s ease;
      box-shadow: 0 0 8px var(--primary);
    }
    .nav-links a:hover {
      color: #fff;
      text-shadow: 0 0 8px var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #0A0F1A !important;
      padding: 0.6rem 1.8rem !important;
      border-radius: 30px;
      font-weight: 700;
      box-shadow: 0 4px 14px rgba(0,229,160,0.4);
      transition: 0.25s;
      display: inline-block;
    }
    .nav-cta:hover {
      filter: brightness(1.15);
      box-shadow: 0 6px 20px rgba(0,229,160,0.6);
      text-shadow: none !important;
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: #fff;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(8,12,22,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem 1.5rem;
        gap: 1.8rem;
        border-bottom: 2px solid var(--primary);
        z-index: 99;
        align-items: flex-start;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        font-size: 1.2rem;
        border-left: 3px solid transparent;
        padding-left: 1rem;
      }
      .nav-links a:hover {
        border-left-color: var(--primary);
        text-shadow: 0 0 8px var(--primary);
      }
      .hamburger {
        display: block;
      }
      .nav-cta {
        align-self: flex-start;
      }
    }
    /* Hero */
    #hero {
      padding: 8rem 0 4rem;
      background: radial-gradient(circle at 30% 20%, rgba(0,229,160,0.08), transparent 60%);
      position: relative;
    }
    .hero-bg {
      position: absolute;
      top: 0;
      right: 0;
      width: 55%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.18;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.4), transparent);
      z-index: 0;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 3rem;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 1;
    }
    .hero-left h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #fff, #c0f0ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: #b0bed0;
      margin-bottom: 2rem;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00E5A0, #00C78C);
      border: none;
      padding: 0.9rem 2.2rem;
      border-radius: 30px;
      font-weight: 700;
      color: #0A0F1A;
      box-shadow: 0 8px 18px rgba(0,229,160,0.35);
      transition: 0.25s;
      display: inline-block;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 10px 24px rgba(0,229,160,0.5);
      color: #0A0F1A;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      padding: 0.85rem 2.2rem;
      border-radius: 30px;
      font-weight: 700;
      color: var(--primary);
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(0,229,160,0.08);
      box-shadow: 0 0 16px rgba(0,229,160,0.4);
      color: #fff;
    }
    .hero-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
      align-items: flex-end;
    }
    .float-badge {
      background: rgba(10,15,26,0.8);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 1rem 1.8rem;
      color: #fff;
      font-weight: 700;
      font-size: 2rem;
      display: flex;
      align-items: baseline;
      gap: 0.5rem;
      box-shadow: 0 0 24px rgba(0,229,160,0.2);
      animation: pulseGlow 2.2s infinite;
    }
    .badge-sm {
      font-size: 1rem;
      color: var(--primary);
    }
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 18px rgba(0,229,160,0.15); }
      50% { box-shadow: 0 0 28px rgba(0,229,160,0.4); }
      100% { box-shadow: 0 0 18px rgba(0,229,160,0.15); }
    }
    @media (max-width: 1024px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-right {
        flex-direction: row;
        justify-content: center;
        align-items: center;
      }
      .hero-left h1 {
        font-size: 2.5rem;
      }
    }
    /* 通用区块 */
    section {
      padding: 4.5rem 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 2.5rem;
    }
    .section-title h2 {
      font-size: 2.2rem;
      font-weight: 700;
      color: #fff;
    }
    .section-title h3 {
      font-size: 1.25rem;
      color: #99aabf;
      margin-top: 0.5rem;
    }
    .grid-3, .grid-4 {
      display: grid;
      gap: 2rem;
    }
    .grid-3 { grid-template-columns: repeat(3,1fr); }
    .grid-4 { grid-template-columns: repeat(4,1fr); }
    @media (max-width: 1024px) {
      .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .grid-3, .grid-4 { grid-template-columns: 1fr; }
    }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 1.8rem;
      transition: all 0.3s ease;
      backdrop-filter: blur(8px);
    }
    .card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-glow);
      transform: translateY(-6px);
    }
    .badge-num {
      background: rgba(0,229,160,0.1);
      color: var(--primary);
      padding: 0.2rem 1rem;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
      display: inline-block;
      margin-top: 1rem;
      font-feature-settings: "tnum";
    }
    /* 案例瀑布 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
    }
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      transition: 0.3s;
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-glow);
    }
    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .case-body {
      padding: 1.5rem;
    }
    @media (max-width: 1024px) {
      .case-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .case-grid { grid-template-columns: 1fr; }
    }
    /* 对比表 */
    .compare-table {
      display: flex;
      gap: 2rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .plan-card {
      background: rgba(255,255,255,0.02);
      border-radius: 24px;
      padding: 2rem;
      flex: 1;
      min-width: 260px;
      border: 1px solid var(--border-light);
    }
    .plan-highlight {
      border-color: var(--primary);
      box-shadow: 0 0 24px rgba(0,229,160,0.15);
    }
    /* FAQ */
    .accordion-title {
      background: rgba(10,15,26,0.7);
      border: 1px solid rgba(255,255,255,0.05);
      border-radius: 12px;
      padding: 1rem 1.5rem;
      font-weight: 600;
      cursor: pointer;
      transition: 0.2s;
      margin-bottom: 0.5rem;
      display: flex;
      justify-content: space-between;
    }
    .accordion-title:hover {
      border-left: 4px solid var(--primary);
    }
    .accordion-content {
      padding: 0 1.5rem 1rem;
      color: #b0bed0;
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    .accordion-item.active .accordion-title {
      border-left: 4px solid var(--primary);
      box-shadow: 0 0 12px rgba(0,229,160,0.15);
    }
    footer {
      background: #060b14;
      padding: 3rem 0 1.5rem;
      border-top: 1px solid rgba(0,229,160,0.2);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 480px) {
      .footer-grid { grid-template-columns: 1fr; }
    }