/* roulang page: index */
:root {
      --primary-bg: #1A0B2E;
      --dark-bg: #0D0D0D;
      --gold: #D4AF37;
      --gold-bright: #F0C45A;
      --green: #00F0A8;
      --green-soft: rgba(0, 240, 168, 0.15);
      --white-muted: rgba(255, 255, 255, 0.7);
      --white-strong: rgba(255, 255, 255, 0.9);
      --border-light: rgba(212, 175, 55, 0.2);
      --border-glow: rgba(212, 175, 55, 0.5);
      --card-bg: rgba(255, 255, 255, 0.03);
      --shadow-gold: 0 0 20px rgba(212, 175, 55, 0.15);
      --radius-card: 12px;
      --radius-btn: 30px;
      --font-heading: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-body: "Inter", "Montserrat", "Noto Sans SC", sans-serif;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--primary-bg);
      color: #fff;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(circle at 30% 20%, rgba(212, 175, 55, 0.08) 0%, transparent 45%),
                        radial-gradient(circle at 80% 70%, rgba(0, 240, 168, 0.05) 0%, transparent 50%);
      background-attachment: fixed;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(13, 13, 13, 0.75);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      transition: background 0.3s ease;
    }
    
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    
    .logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.8rem;
      background: linear-gradient(135deg, #D4AF37 0%, #F0C45A 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.3px;
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }
    
    .nav-links a {
      color: var(--white-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.25s;
      letter-spacing: 0.3px;
    }
    
    .nav-links a:hover {
      color: var(--green);
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    
    .search-box {
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 30px;
      padding: 8px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--white-muted);
      font-size: 0.9rem;
    }
    
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: white;
      width: 140px;
      font-size: 0.9rem;
    }
    
    .search-box input::placeholder {
      color: rgba(255, 255, 255, 0.5);
    }
    
    .btn-gold {
      background: var(--gold);
      color: #0D0D0D;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: background 0.2s, box-shadow 0.2s;
      letter-spacing: 0.5px;
    }
    
    .btn-gold:hover {
      background: var(--gold-bright);
      box-shadow: 0 8px 18px rgba(212, 175, 55, 0.3);
    }
    
    .mobile-menu-icon {
      display: none;
      font-size: 1.8rem;
      color: var(--gold);
      cursor: pointer;
    }
    
    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
      position: relative;
      overflow: hidden;
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 3rem;
      width: 100%;
    }
    
    .hero-left {
      flex: 1 1 50%;
    }
    
    .hero-left h1 {
      font-family: var(--font-heading);
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 1.5rem;
    }
    
    .gold-highlight {
      color: var(--gold);
    }
    
    .hero-sub {
      font-size: 1.2rem;
      color: var(--white-muted);
      margin-bottom: 2.5rem;
      max-width: 480px;
      line-height: 1.7;
    }
    
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-outline-green {
      background: transparent;
      border: 1px solid var(--green);
      color: var(--green);
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.2s;
      cursor: pointer;
    }
    
    .btn-outline-green:hover {
      background: var(--green-soft);
      border-color: var(--green);
    }
    
    .hero-right {
      flex: 1 1 45%;
      position: relative;
      height: 420px;
    }
    
    .geometric-art {
      position: relative;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at center, rgba(212,175,55,0.1) 0%, transparent 70%);
    }
    
    .shape {
      position: absolute;
      border: 1px solid rgba(212, 175, 55, 0.4);
      opacity: 0.8;
    }
    
    .hex {
      width: 180px;
      height: 180px;
      top: 20%;
      right: 15%;
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      background: rgba(212,175,55,0.08);
      animation: float 6s infinite ease-in-out;
    }
    
    .diamond {
      width: 130px;
      height: 130px;
      top: 55%;
      left: 10%;
      clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
      background: rgba(0,240,168,0.08);
      border-color: rgba(0,240,168,0.5);
      animation: float 8s infinite reverse;
    }
    
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-18px); }
      100% { transform: translateY(0px); }
    }
    
    /* 信任条 */
    .trust-bar {
      background: rgba(13,13,13,0.6);
      border-top: 1px solid rgba(255,255,255,0.05);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      padding: 20px 0;
    }
    
    .partner-logos {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 3rem;
      flex-wrap: wrap;
      filter: grayscale(1) brightness(0.8);
      opacity: 0.7;
    }
    
    .partner-logos span {
      font-weight: 600;
      letter-spacing: 1px;
      color: rgba(255,255,255,0.5);
      transition: 0.3s;
      font-size: 1.1rem;
    }
    
    .partner-logos span:hover {
      color: var(--gold);
      filter: none;
    }
    
    /* 通用板块 */
    .section {
      padding: 100px 0;
    }
    
    .section-title {
      font-family: var(--font-heading);
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 1rem;
      letter-spacing: -0.3px;
    }
    
    .section-desc {
      color: var(--white-muted);
      max-width: 600px;
      margin-bottom: 3rem;
    }
    
    /* 服务 2x3 非对称 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: all 0.25s;
    }
    
    .service-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-gold);
      transform: translateY(-4px);
    }
    
    .service-icon {
      font-size: 2rem;
      margin-bottom: 20px;
      color: var(--gold);
    }
    
    .service-card h3 {
      font-weight: 600;
      margin-bottom: 12px;
    }
    
    /* 数据深色条 */
    .data-strip {
      background: #0A0A0F;
      padding: 70px 0;
      margin: 20px 0;
    }
    
    .stats {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
    }
    
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--green);
      font-family: 'Inter', sans-serif;
    }
    
    /* 案例交替 */
    .case-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 80px;
    }
    
    .case-row.reverse {
      flex-direction: row-reverse;
    }
    
    .case-img {
      flex: 1;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(0,0,0,0.5);
    }
    
    .case-text {
      flex: 1;
    }
    
    /* FAQ */
    .faq-grid {
      display: flex;
      gap: 3rem;
    }
    
    .accordion-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      margin-bottom: 4px;
    }
    
    .accordion-title {
      background: transparent;
      padding: 20px 0;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, rgba(26,11,46,0.9) 0%, #0D0D0D 100%);
      text-align: center;
      padding: 90px 0;
    }
    
    .cta-form input {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 30px;
      padding: 12px 20px;
      color: white;
      margin: 0 8px;
    }
    
    /* 页脚 */
    .footer {
      background: #050508;
      padding: 60px 0 30px;
    }
    
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-content { flex-direction: column; }
    }
    
    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-box { display: none; }
      .mobile-menu-icon { display: block; }
      .services-grid { grid-template-columns: 1fr; }
      .case-row, .case-row.reverse { flex-direction: column; }
      .faq-grid { flex-direction: column; }
    }