/* roulang page: index */
:root {
      --primary: #C8A96E;
      --primary-dark: #A6854A;
      --primary-light: #E0CFB0;
      --secondary: #0F1A2F;
      --secondary-light: #1A2740;
      --accent: #D98C2E;
      --accent-hover: #B8731F;
      --ivory: #F9F6F0;
      --ivory-dark: #EBE4D8;
      --text-dark: #1E1E1E;
      --text-muted: #5A5A5A;
      --border-light: rgba(200,169,110,0.25);
      --glass-bg: rgba(15,26,47,0.15);
      --glass-border: rgba(255,255,255,0.15);
      --card-shadow: 0 10px 30px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 18px 40px rgba(0,0,0,0.12);
      --nav-blur: blur(18px);
      --radius-card: 24px;
      --radius-btn: 50px;
      --radius-input: 12px;
      --radius-badge: 30px;
      --transition: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', '思源黑体', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--ivory);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, .serif-title {
      font-family: 'Noto Serif SC', '思源宋体', 'Georgia', serif;
      font-weight: 500;
      letter-spacing: -0.02em;
    }
    
    .section-title {
      font-size: 2.5rem;
      font-weight: 500;
      margin-bottom: 1rem;
      color: var(--secondary);
    }
    
    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto 3rem auto;
      font-weight: 400;
    }
    
    /* 玻璃导航 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 1rem 0;
      transition: var(--transition);
      background: var(--glass-bg);
      backdrop-filter: var(--nav-blur);
      -webkit-backdrop-filter: var(--nav-blur);
      border-bottom: 1px solid var(--glass-border);
    }
    
    .navbar-scrolled {
      background: rgba(10, 17, 40, 0.96) !important;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(200,169,110,0.3);
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }
    
    .navbar-brand {
      font-family: 'Noto Serif SC', serif;
      font-weight: 600;
      font-size: 1.6rem;
      color: #fff !important;
      letter-spacing: 2px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-brand i {
      color: var(--primary);
      font-size: 1.8rem;
    }
    
    .nav-link {
      color: rgba(255,255,255,0.9) !important;
      font-weight: 400;
      margin: 0 0.3rem;
      padding: 0.5rem 1rem !important;
      border-radius: 30px;
      transition: var(--transition);
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(255,255,255,0.08);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: 0.3s;
    }
    .nav-link:hover::after {
      width: 60%;
    }
    
    .btn-cta-nav {
      background: var(--accent);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.5rem 1.8rem;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      letter-spacing: 0.5px;
      box-shadow: 0 4px 12px rgba(217,140,46,0.4);
    }
    .btn-cta-nav:hover {
      background: var(--accent-hover);
      color: white;
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(217,140,46,0.5);
    }
    
    /* 移动端菜单 */
    .navbar-toggler {
      border: none;
      color: white;
    }
    .offcanvas-glass {
      background: rgba(10,17,40,0.95);
      backdrop-filter: blur(25px);
    }
    
    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(135deg, #0F1A2F 0%, #2E2A1C 100%);
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: white;
      padding: 6rem 1rem 4rem;
      overflow: hidden;
    }
    .hero-bg-img {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center 30%;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(200,169,110,0.15), transparent 70%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }
    .hero h1 {
      font-size: 3.7rem;
      font-weight: 500;
      color: #fff;
      text-shadow: 0 4px 20px rgba(0,0,0,0.3);
      margin-bottom: 1.5rem;
    }
    .hero .lead {
      font-size: 1.3rem;
      opacity: 0.9;
      margin-bottom: 2.5rem;
    }
    .btn-primary-hero {
      background: linear-gradient(135deg, var(--accent), #C07B2A);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      letter-spacing: 1px;
      box-shadow: 0 8px 24px rgba(217,140,46,0.5);
      transition: var(--transition);
    }
    .btn-primary-hero:hover {
      background: linear-gradient(135deg, #E69735, #B36B1E);
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(217,140,46,0.7);
    }
    .btn-outline-hero {
      border: 1.5px solid rgba(255,255,255,0.7);
      color: white;
      background: transparent;
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-btn);
      font-weight: 500;
      backdrop-filter: blur(8px);
      transition: var(--transition);
    }
    .btn-outline-hero:hover {
      background: rgba(255,255,255,0.12);
      border-color: white;
    }
    .badge-float {
      background: rgba(15,26,47,0.75);
      backdrop-filter: blur(12px);
      color: var(--primary);
      border-radius: 40px;
      padding: 0.5rem 1.5rem;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin: 0 0.4rem;
      border: 1px solid rgba(200,169,110,0.35);
    }
    
    /* 通用区块 */
    .section-padding {
      padding: 6rem 0;
    }
    
    /* 价值卡片 */
    .value-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2.2rem 1.8rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.03);
      height: 100%;
    }
    .value-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }
    .icon-circle {
      width: 60px;
      height: 60px;
      background: rgba(200,169,110,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
    }
    
    /* 交错功能 */
    .feature-img {
      border-radius: 20px;
      box-shadow: 0 15px 30px rgba(0,0,0,0.1);
      transition: var(--transition);
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .feature-img:hover {
      transform: translateY(-5px);
      box-shadow: 0 22px 40px rgba(0,0,0,0.18);
    }
    .badge-stat {
      background: rgba(200,169,110,0.15);
      color: var(--secondary);
      border-radius: 30px;
      padding: 0.3rem 1.2rem;
      font-weight: 600;
      display: inline-block;
    }
    
    /* 场景卡 */
    .scenario-card {
      border-radius: var(--radius-card);
      overflow: hidden;
      background: white;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }
    .scenario-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-hover-shadow);
    }
    .scenario-card img {
      transition: transform 0.5s ease;
      height: 240px;
      object-fit: cover;
    }
    .scenario-card:hover img {
      transform: scale(1.04);
    }
    
    /* 数据墙 */
    .data-badge-large {
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.2;
    }
    
    /* FAQ */
    .accordion-button {
      font-weight: 500;
      background: transparent;
      border-bottom: 1px solid var(--border-light);
      border-radius: 0 !important;
      box-shadow: none;
      color: var(--secondary);
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(200,169,110,0.06);
      color: var(--secondary);
      box-shadow: none;
    }
    .accordion-item {
      border: none;
      background: transparent;
    }
    
    /* 表单 */
    .form-control {
      border-radius: var(--radius-input);
      border: 1px solid #E0D6C8;
      background: white;
      padding: 0.8rem 1.2rem;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(200,169,110,0.2);
    }
    
    .footer {
      background: #0B1322;
      color: #B0B8C5;
      padding: 2.5rem 0;
    }
    
    @media (max-width: 768px) {
      .hero h1 { font-size: 2.3rem; }
      .section-title { font-size: 2rem; }
      .navbar-brand { font-size: 1.3rem; }
      .badge-float { margin-bottom: 0.8rem; }
    }