/* roulang page: index */
/* 全局变量与重置 */
    :root {
      --primary-orange: #FF6A3D;
      --primary-orange-hover: #FF8A6D;
      --deep-purple: #1E0A3C;
      --darker-bg: #0F0525;
      --neon-cyan: #00F0B5;
      --text-light: #E0D7FF;
      --text-white: #FFFFFF;
      --card-bg: rgba(30, 10, 60, 0.7);
      --card-border: rgba(255, 106, 61, 0.15);
      --card-hover-border: rgba(0, 240, 181, 0.5);
      --glass-blur: blur(20px);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --shadow-glow: 0 0 25px rgba(255, 106, 61, 0.5);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --font-mono: "Inter", "SF Pro Display", system-ui, sans-serif;
      --spacing-section: 100px;
      --max-width: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: radial-gradient(circle at 20% 10%, #2D1654 0%, #1E0A3C 45%, #0F0525 100%);
      background-attachment: fixed;
      color: var(--text-light);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    button, input {
      font-family: inherit;
      outline: none;
    }

    /* 容器 */
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 - 桌面固定顶部 */
    .desktop-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(15, 5, 37, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 106, 61, 0.2);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .nav-container {
      max-width: var(--max-width);
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 24px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-white);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--primary-orange);
      font-size: 2rem;
    }
    .logo span {
      background: linear-gradient(135deg, #FF6A3D, #FFA06D);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-light);
      position: relative;
      padding: 6px 0;
      transition: color 0.25s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-orange);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--primary-orange);
    }
    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      background: var(--primary-orange);
      color: white;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.95rem;
      box-shadow: 0 4px 15px rgba(255, 106, 61, 0.4);
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
    }
    .nav-cta:hover {
      background: var(--primary-orange-hover);
      box-shadow: 0 0 30px rgba(255, 106, 61, 0.7);
      transform: translateY(-1px);
    }

    /* 移动端底部胶囊导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 500px;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border-radius: 40px;
      padding: 8px 12px;
      z-index: 1001;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
      border: 1px solid rgba(255,255,255,0.2);
    }
    .mobile-nav-icons {
      display: flex;
      justify-content: space-around;
      align-items: center;
    }
    .mobile-nav-icons a {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: rgba(255,255,255,0.7);
      font-size: 0.7rem;
      transition: 0.2s;
      padding: 6px 10px;
      border-radius: 20px;
    }
    .mobile-nav-icons a i {
      font-size: 1.4rem;
      margin-bottom: 2px;
    }
    .mobile-nav-icons a.active {
      color: var(--primary-orange);
    }
    .mobile-cta-btn {
      background: var(--primary-orange);
      color: white;
      border-radius: 30px;
      padding: 8px 18px;
      font-weight: 700;
      font-size: 0.9rem;
      box-shadow: 0 0 20px rgba(255,106,61,0.7);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块通用 */
    section {
      padding: var(--spacing-section) 0;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 600;
      color: var(--text-white);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .section-title::after {
      content: '';
      display: inline-block;
      width: 48px;
      height: 3px;
      background: var(--neon-cyan);
      border-radius: 2px;
    }
    .section-sub {
      color: var(--text-light);
      margin-bottom: 48px;
      max-width: 600px;
    }

    /* 卡片网格 */
    .grid-4, .grid-6, .grid-2 {
      display: grid;
      gap: 24px;
    }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .grid-6 { grid-template-columns: repeat(3, 1fr); }

    .card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: all 0.3s ease;
    }
    .card:hover {
      border-color: var(--card-hover-border);
      box-shadow: 0 20px 35px rgba(0,0,0,0.4);
      transform: translateY(-6px);
    }
    .card-icon {
      font-size: 2.5rem;
      color: var(--neon-cyan);
      margin-bottom: 16px;
    }

    /* Hero 区域 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 72px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero-text h1 {
      font-size: 3rem;
      font-weight: 700;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-text .highlight {
      color: var(--primary-orange);
    }
    .hero-desc {
      font-size: 1.1rem;
      margin-bottom: 32px;
      color: var(--text-light);
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 700;
      border: none;
      box-shadow: 0 0 20px rgba(255,106,61,0.6);
      transition: 0.3s;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: #FF8A6D;
      box-shadow: 0 0 35px rgba(255,106,61,0.9);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 600;
      transition: 0.3s;
    }
    .btn-outline:hover {
      border-color: var(--primary-orange);
      color: var(--primary-orange);
    }
    .hero-image {
      flex: 1 1 400px;
    }
    .hero-image img {
      border-radius: 24px;
      box-shadow: 0 0 40px rgba(0,240,181,0.2);
    }

    /* 安全流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .step-item {
      text-align: center;
      flex: 1;
    }
    .step-num {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--neon-cyan);
    }

    /* 数据数字 */
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--neon-cyan);
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: rgba(30,10,60,0.5);
      border-radius: 12px;
      margin-bottom: 12px;
      border: 1px solid rgba(255,106,61,0.2);
    }
    .faq-question {
      padding: 20px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    /* 表单 */
    .cta-form input {
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,106,61,0.4);
      padding: 14px;
      border-radius: 30px;
      color: white;
      width: 100%;
      margin-bottom: 16px;
    }

    footer {
      background: #0F0525;
      padding: 60px 0 30px;
    }

    @media (max-width: 1023px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-6 { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
      .desktop-nav { display: none; }
      .mobile-bottom-nav { display: block; }
      .grid-4, .grid-6 { grid-template-columns: 1fr; }
      .hero-text h1 { font-size: 2.2rem; }
      section { padding: 60px 0; }
    }