/* roulang page: index */
:root {
      --deep-space: #0B0C10;
      --deep-space-alt: #0D0F1A;
      --aurora-cyan: #00F0C7;
      --energy-purple: #7B2FFF;
      --energy-purple-light: #8A4FFF;
      --starlight-gold: #FFD966;
      --text-primary: #E8E8EC;
      --text-secondary: #9A9CA8;
      --card-bg: rgba(20, 22, 35, 0.7);
      --card-bg-solid: rgba(18, 20, 32, 0.65);
      --border-subtle: rgba(255, 255, 255, 0.06);
      --border-purple: rgba(123, 47, 255, 0.25);
      --border-cyan: rgba(0, 240, 199, 0.5);
      --shadow-deep: 0 8px 32px rgba(0, 0, 0, 0.4);
      --glow-cyan: 0 0 20px rgba(0, 240, 199, 0.35);
      --glow-cyan-hover: 0 0 32px rgba(0, 240, 199, 0.55);
      --radius-card: 20px;
      --radius-btn: 40px;
      --radius-input: 12px;
      --font-h1: 3.5rem;
      --font-h2: 2.5rem;
      --transition-base: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--deep-space);
      color: var(--text-primary);
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    /* 深空噪点背景 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: 0;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      position: relative;
      z-index: 2;
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(123, 47, 255, 0.2);
      padding: 12px 0;
      position: sticky;
      top: 0;
      z-index: 1000;
      transition: var(--transition-base);
    }

    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(135deg, var(--aurora-cyan) 0%, #fff 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
    }

    .search-box {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 50px;
      padding: 8px 22px;
      color: white;
      width: 260px;
      transition: var(--transition-base);
    }

    .search-box:focus {
      outline: none;
      border-color: var(--aurora-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 199, 0.3);
      background: rgba(0, 240, 199, 0.04);
    }

    .search-box::placeholder {
      color: #9A9CA8;
      font-size: 0.9rem;
    }

    .nav-link-custom {
      color: var(--text-secondary) !important;
      font-weight: 500;
      margin: 0 6px;
      padding: 6px 14px !important;
      border-radius: 30px;
      transition: var(--transition-base);
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--aurora-cyan) !important;
      background: rgba(0, 240, 199, 0.08);
    }

    /* 按钮 */
    .btn-primary-custom {
      background: var(--aurora-cyan);
      color: #0B0C10;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      border: none;
      box-shadow: var(--glow-cyan);
      transition: var(--transition-base);
      letter-spacing: 0.3px;
    }

    .btn-primary-custom:hover {
      background: #33F5D8;
      box-shadow: var(--glow-cyan-hover);
      transform: scale(1.04);
      color: #0B0C10;
    }

    .btn-outline-custom {
      background: transparent;
      border: 1px solid rgba(123, 47, 255, 0.5);
      color: var(--text-primary);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 500;
      transition: var(--transition-base);
    }

    .btn-outline-custom:hover {
      border-color: var(--aurora-cyan);
      color: var(--aurora-cyan);
      background: rgba(0, 240, 199, 0.06);
    }

    /* 区块间距 */
    section {
      padding: 90px 0;
      position: relative;
      z-index: 2;
    }

    .section-title {
      font-size: var(--font-h2);
      font-weight: 600;
      margin-bottom: 1rem;
      letter-spacing: -0.01em;
      color: white;
    }

    .title-decor {
      display: inline-block;
      width: 60px;
      height: 4px;
      background: var(--aurora-cyan);
      margin-bottom: 1.5rem;
      border-radius: 2px;
    }

    /* Hero 区块 */
    #hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: radial-gradient(ellipse at 30% 40%, rgba(123, 47, 255, 0.25) 0%, transparent 60%),
                  radial-gradient(ellipse at 70% 60%, rgba(0, 240, 199, 0.15) 0%, transparent 55%);
      position: relative;
    }

    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mask-image: linear-gradient(to left, black 40%, transparent 100%);
      z-index: 0;
    }

    h1 {
      font-size: var(--font-h1);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      text-shadow: 0 0 30px rgba(0,0,0,0.5);
    }

    /* 深空玻璃卡片 */
    .glass-card {
      background: var(--card-bg-solid);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-purple);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-deep);
      transition: var(--transition-base);
      height: 100%;
    }

    .glass-card:hover {
      border-color: var(--border-cyan);
      box-shadow: 0 0 24px rgba(0, 240, 199, 0.12), var(--shadow-deep);
      transform: translateY(-6px);
    }

    .service-icon {
      color: var(--aurora-cyan);
      font-size: 2.2rem;
      margin-bottom: 1.2rem;
    }

    .data-number {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--aurora-cyan);
      line-height: 1.1;
    }

    .data-unit {
      font-size: 1.8rem;
      font-weight: 600;
      color: var(--starlight-gold);
    }

    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
      position: relative;
      overflow: hidden;
    }

    .case-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(0, 240, 199, 0);
      transition: 0.3s;
    }

    .glass-card:hover .case-img::after {
      background: rgba(0, 240, 199, 0.12);
    }

    .badge-custom {
      background: rgba(0, 240, 199, 0.12);
      color: var(--aurora-cyan);
      border-radius: 30px;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    .step-circle {
      width: 48px;
      height: 48px;
      border: 2px solid var(--aurora-cyan);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.3rem;
      color: var(--aurora-cyan);
      background: transparent;
      transition: var(--transition-base);
      margin: 0 auto 1rem;
    }

    .step-item:hover .step-circle {
      background: var(--aurora-cyan);
      color: #0B0C10;
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 1rem 0;
      cursor: pointer;
    }

    .faq-question {
      font-weight: 600;
      font-size: 1.2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: white;
    }

    .faq-answer {
      color: var(--text-secondary);
      max-height: 0;
      overflow: hidden;
      transition: 0.35s ease;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 0.8rem;
    }

    .faq-icon {
      color: var(--aurora-cyan);
      font-size: 1.4rem;
    }

    .form-control-custom {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-input);
      color: white;
      padding: 12px 16px;
    }

    .form-control-custom:focus {
      border-color: var(--aurora-cyan);
      box-shadow: 0 0 8px rgba(0,240,199,0.25);
      background: rgba(0,240,199,0.03);
      color: white;
    }

    footer {
      background: #0A0B0F;
      border-top: 1px solid rgba(123,47,255,0.2);
      color: var(--text-secondary);
    }

    @media (max-width: 992px) {
      :root {
        --font-h1: 2.8rem;
        --font-h2: 2rem;
      }
      .navbar-custom .search-box {
        width: 180px;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .hero-bg-img {
        width: 100%;
        opacity: 0.15;
      }
      .data-number {
        font-size: 2.8rem;
      }
    }