/* roulang page: index */
:root {
      --primary-deep: #1A1F3A;
      --primary-bg-start: #0D1120;
      --primary-bg-end: #1A1F3A;
      --accent-gold: #F2C94C;
      --accent-gold-dark: #E0A800;
      --accent-cyan: #4CD9B9;
      --text-primary: #E8ECF1;
      --text-secondary: #8A93A8;
      --text-highlight: #F2C94C;
      --card-bg: rgba(255, 255, 255, 0.04);
      --card-border: rgba(242, 201, 76, 0.15);
      --footer-bg: #0A0D18;
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
      --font-body: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background: linear-gradient(180deg, var(--primary-bg-start) 0%, var(--primary-bg-end) 100%);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-smooth);
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(13, 17, 32, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(242, 201, 76, 0.2);
      transition: background 0.4s, box-shadow 0.4s;
    }

    .navbar.scrolled {
      background: rgba(10, 13, 24, 0.98);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-heading);
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 1px;
    }

    .logo i {
      font-size: 2rem;
      color: var(--accent-gold);
      filter: drop-shadow(0 0 6px rgba(242, 201, 76, 0.5));
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-gold);
    }

    .btn-nav {
      background: linear-gradient(135deg, #F2C94C 0%, #E0A800 100%);
      color: #1A1F3A;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
      transition: all var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(242, 201, 76, 0.3);
    }

    .btn-nav:hover {
      background: #FFD966;
      box-shadow: 0 6px 18px rgba(242, 201, 76, 0.5);
      transform: translateY(-1px);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--accent-gold);
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero 区 */
    .hero {
      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 30%;
      background-blend-mode: overlay;
      background-color: rgba(13, 17, 32, 0.75);
      padding-top: 70px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 50%, rgba(242, 201, 76, 0.08) 0%, transparent 60%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      display: flex;
      flex-direction: column;
      gap: 28px;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-size: clamp(2.4rem, 6vw, 3.5rem);
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.3;
      letter-spacing: -0.5px;
      text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    }

    .hero h1 span {
      color: var(--accent-gold);
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: #C0C7D6;
      max-width: 550px;
      line-height: 1.8;
    }

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 12px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #F2C94C, #E0A800);
      color: #1A1F3A;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.3s;
      box-shadow: 0 6px 18px rgba(242, 201, 76, 0.4);
    }

    .btn-primary:hover {
      background: #FFD966;
      box-shadow: 0 8px 24px rgba(242, 201, 76, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s;
    }

    .btn-outline:hover {
      background: rgba(242, 201, 76, 0.1);
      border-color: #FFD966;
    }

    .hero-trust {
      display: flex;
      gap: 48px;
      margin-top: 20px;
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .hero-trust i {
      color: var(--accent-gold);
      margin-right: 6px;
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
      position: relative;
    }

    .section-title {
      font-family: var(--font-heading);
      font-size: clamp(2rem, 4vw, 2.6rem);
      font-weight: 700;
      text-align: center;
      margin-bottom: 20px;
      color: #FFFFFF;
      letter-spacing: -0.3px;
    }

    .section-sub {
      text-align: center;
      color: var(--text-secondary);
      max-width: 650px;
      margin: 0 auto 50px;
      font-size: 1.05rem;
    }

    .gold {
      color: var(--accent-gold);
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 32px;
    }

    .service-card {
      background: rgba(30, 35, 53, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      transition: all var(--transition-smooth);
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .service-card:hover {
      transform: translateY(-6px);
      border-color: rgba(242, 201, 76, 0.5);
      background: rgba(30, 35, 53, 0.85);
    }

    .service-icon {
      font-size: 2.5rem;
      color: var(--accent-gold);
    }

    .service-card h3 {
      font-size: 1.5rem;
      font-weight: 700;
    }

    .service-card p {
      color: #C0C7D6;
      font-size: 0.95rem;
    }

    /* 数据区 */
    .stats-band {
      background: rgba(10, 13, 24, 0.7);
      border-top: 1px solid rgba(242, 201, 76, 0.2);
      border-bottom: 1px solid rgba(242, 201, 76, 0.2);
      padding: 60px 0;
    }

    .stats-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-around;
      gap: 30px;
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-gold);
      line-height: 1.2;
    }

    .stat-label {
      color: #8A93A8;
      font-size: 0.95rem;
      margin-top: 8px;
    }

    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .case-card {
      background: rgba(30, 35, 53, 0.7);
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid var(--card-border);
      transition: all 0.3s;
    }

    .case-card:hover {
      border-color: rgba(242, 201, 76, 0.6);
      transform: translateY(-4px);
    }

    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .case-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(26, 31, 58, 0.8) 0%, transparent 60%);
    }

    .case-body {
      padding: 22px;
    }

    .case-body h3 {
      font-weight: 700;
      font-size: 1.3rem;
      margin-bottom: 8px;
    }

    .tag {
      display: inline-block;
      background: rgba(76, 217, 185, 0.15);
      color: var(--accent-cyan);
      font-size: 0.75rem;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    /* 流程 */
    .steps {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
    }

    .step {
      text-align: center;
      flex: 1 1 180px;
    }

    .step-circle {
      width: 70px;
      height: 70px;
      background: rgba(242, 201, 76, 0.15);
      border: 2px solid var(--accent-gold);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-gold);
      margin: 0 auto 20px;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border: 1px solid rgba(242, 201, 76, 0.2);
      border-radius: 10px;
      margin-bottom: 16px;
      background: rgba(30, 35, 53, 0.5);
      overflow: hidden;
    }

    .faq-question {
      padding: 22px 28px;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: none;
      border: none;
      color: #E8ECF1;
      width: 100%;
      font-size: 1.05rem;
    }

    .faq-answer {
      padding: 0 28px 22px;
      color: #C0C7D6;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active {
      border-color: var(--accent-gold);
    }

    /* 联系 CTA */
    .cta-section {
      background: radial-gradient(circle at 50% 30%, rgba(242, 201, 76, 0.08) 0%, transparent 60%);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 20px;
      max-width: 520px;
      margin: 0 auto;
    }

    .contact-form input,
    .contact-form textarea {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(242, 201, 76, 0.25);
      border-radius: 8px;
      padding: 14px 18px;
      color: #E8ECF1;
      font-size: 1rem;
      outline: none;
      transition: 0.2s;
    }

    .contact-form input:focus,
    .contact-form textarea:focus {
      border-color: var(--accent-gold);
    }

    /* 页脚 */
    .footer {
      background: #0A0D18;
      border-top: 1px solid rgba(242, 201, 76, 0.4);
      padding: 60px 0 30px;
      color: #8A93A8;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      margin-bottom: 18px;
      font-weight: 700;
    }

    .footer a {
      display: block;
      margin-bottom: 10px;
      font-size: 0.9rem;
    }

    .footer a:hover {
      color: var(--accent-gold);
    }

    .copyright {
      margin-top: 40px;
      text-align: center;
      font-size: 0.85rem;
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 20px;
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 767px) {
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(10, 13, 24, 0.95);
        backdrop-filter: blur(12px);
        border-top: 1px solid rgba(242,201,76,0.3);
        justify-content: space-around;
        padding: 12px 0;
        z-index: 999;
      }
      .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        color: #8A93A8;
      }
      .mobile-bottom-nav i {
        font-size: 1.2rem;
        margin-bottom: 2px;
      }
      .hero {
        padding-top: 90px;
      }
      section {
        padding: 60px 0;
      }
    }