/* roulang page: index */
:root {
      --deep-space: #0A0E27;
      --deep-space-light: #141832;
      --blaze-red: #FF4655;
      --blaze-red-dark: #E63946;
      --champion-gold: #FFD700;
      --bg-light: #F5F5F7;
      --white: #FFFFFF;
      --card-bg: #FFFFFF;
      --card-bg-alt: #FAFAFA;
      --text-dark: #1A1A1A;
      --text-muted: #555555;
      --text-light-muted: #888888;
      --text-white: #FFFFFF;
      --border-light: #EEEEEE;
      --border-input: #DDDDDD;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-md: 0 8px 30px rgba(0,0,0,0.12);
      --radius-lg: 12px;
      --radius-md: 8px;
      --radius-pill: 30px;
      --font-en: 'Rajdhani', 'Orbitron', sans-serif;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
      --transition-base: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-cn);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
      font-weight: 400;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-cn);
      font-weight: 700;
    }
    
    .en-font {
      font-family: var(--font-en);
      font-weight: 600;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航栏 - 固定顶部 chip 风格 */
    .navbar-custom {
      background-color: rgba(10, 14, 39, 0.92);
      backdrop-filter: blur(10px);
      height: 72px;
      box-shadow: 0 2px 15px rgba(0,0,0,0.3);
      transition: var(--transition-base);
      padding: 0 1.5rem;
    }
    .navbar-custom.scrolled {
      background-color: rgba(10, 14, 39, 0.98);
    }
    .logo-text {
      font-family: var(--font-en);
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: 1px;
      color: var(--white);
      line-height: 1;
      display: flex;
      align-items: center;
    }
    .logo-text span {
      color: var(--champion-gold);
      font-family: var(--font-cn);
      font-weight: 700;
      margin-left: 5px;
      font-size: 1.4rem;
    }
    .nav-chip {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
    }
    .nav-chip .nav-link {
      background: rgba(255,255,255,0.1);
      color: rgba(255,255,255,0.85);
      border-radius: var(--radius-pill);
      padding: 8px 22px;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-base);
      text-decoration: none;
      white-space: nowrap;
    }
    .nav-chip .nav-link:hover,
    .nav-chip .nav-link.active {
      background: var(--blaze-red);
      color: white;
      box-shadow: 0 0 12px rgba(255,70,85,0.6);
    }
    .btn-cta-nav {
      background: var(--blaze-red);
      color: white;
      border-radius: var(--radius-md);
      padding: 10px 24px;
      font-weight: 600;
      border: none;
      transition: var(--transition-base);
      margin-left: 16px;
      white-space: nowrap;
    }
    .btn-cta-nav:hover {
      background: var(--blaze-red-dark);
      transform: scale(1.03);
      color: white;
    }
    
    /* Hero 全屏 */
    #hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #0A0E27 0%, #1A1F40 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      color: white;
      padding-top: 72px;
    }
    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
      color: white;
    }
    .hero-highlight {
      color: var(--champion-gold);
    }
    .hero-sub {
      font-size: 1.3rem;
      opacity: 0.9;
      margin-top: 1.2rem;
      margin-bottom: 2rem;
    }
    .btn-hero-primary {
      background: var(--blaze-red);
      border: none;
      padding: 14px 36px;
      font-weight: 600;
      border-radius: var(--radius-md);
      color: white;
      transition: var(--transition-base);
      margin: 0 8px;
    }
    .btn-hero-primary:hover {
      background: var(--blaze-red-dark);
      transform: scale(1.04);
    }
    .btn-hero-outline {
      background: transparent;
      border: 2px solid white;
      padding: 14px 36px;
      font-weight: 600;
      border-radius: var(--radius-md);
      color: white;
      transition: var(--transition-base);
      margin: 0 8px;
    }
    .btn-hero-outline:hover {
      background: rgba(255,255,255,0.15);
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(255,255,255,0.7);
      font-size: 1.8rem;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%,20%,50%,80%,100% {transform:translateX(-50%) translateY(0);}
      40% {transform:translateX(-50%) translateY(-10px);}
      60% {transform:translateX(-50%) translateY(-5px);}
    }
    
    /* 区块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section { padding: 70px 0; }
      .hero-content h1 { font-size: 2.4rem; }
    }
    .section-title h2 {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 8px;
      position: relative;
    }
    .section-title .decor-line {
      width: 60px;
      height: 4px;
      background: var(--blaze-red);
      margin: 12px auto 24px;
    }
    
    /* 优势数据 */
    .advantage-item {
      text-align: center;
    }
    .advantage-number {
      font-family: var(--font-en);
      font-size: 3.8rem;
      font-weight: 700;
      color: var(--champion-gold);
      line-height: 1;
    }
    .advantage-desc {
      color: var(--text-muted);
      font-weight: 500;
    }
    
    /* 服务卡片非对称 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      height: 100%;
      border: 1px solid var(--border-light);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .service-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .service-overlay {
      position: absolute;
      top:0;left:0;right:0;bottom:0;
      background: rgba(255,70,85,0.25);
    }
    .service-body { padding: 28px 24px; }
    
    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }
    .case-card {
      min-width: 280px;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border-left: 5px solid var(--blaze-red);
    }
    
    /* 流程时间线 */
    .timeline-step {
      display: flex;
      gap: 24px;
      margin-bottom: 32px;
    }
    .step-marker {
      width: 48px;
      height: 48px;
      background: var(--blaze-red);
      border-radius: 50%;
      color: white;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--blaze-red);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--blaze-red);
      box-shadow: 0 0 0 3px rgba(255,70,85,0.2);
    }
    
    /* 联系表单 */
    .form-control {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-input);
      padding: 12px 16px;
    }
    .form-control:focus {
      border-color: var(--blaze-red);
      box-shadow: 0 0 0 3px rgba(255,70,85,0.15);
    }
    .btn-submit {
      background: var(--blaze-red);
      border: none;
      padding: 12px 32px;
      font-weight: 600;
      border-radius: var(--radius-md);
      color: white;
    }
    .btn-submit:hover {
      background: var(--blaze-red-dark);
    }
    
    footer {
      background: var(--deep-space);
      color: rgba(255,255,255,0.8);
      padding: 60px 0 20px;
    }
    footer a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
    }
    footer a:hover { color: var(--blaze-red); }
    
    @media (max-width: 991px) {
      .navbar-custom .nav-chip { display: none; }
      .navbar-mobile-toggle { display: block; }
    }