/* roulang page: index */
/* ----- 设计变量 & 全局重置 ----- */
    :root {
      --bg-deep: #1E1E24;
      --bg-card: rgba(20, 20, 26, 0.85);
      --bg-card-solid: #14141a;
      --red-accent: #D42E2E;
      --red-hover: #E84545;
      --gold: #C8A96E;
      --gold-soft: rgba(200, 169, 110, 0.2);
      --text-primary: #F5F5F7;
      --text-secondary: #B0B0B8;
      --text-muted: #7A7A84;
      --border-subtle: rgba(200, 169, 110, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-red: 0 4px 16px rgba(212, 46, 46, 0.4);
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --transition-smooth: all 0.25s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }
    
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 背景纹理与全局氛围 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(200, 169, 110, 0.08) 0%, transparent 50%);
      pointer-events: none;
      z-index: -1;
    }
    
    /* ----- 导航 (固定顶部, 暗色半透明) ----- */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(20, 20, 26, 0.9);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--gold-soft);
      z-index: 1000;
      padding: 0 24px;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--gold);
      font-size: 1.8rem;
    }
    .logo span {
      background: linear-gradient(135deg, #fff 0%, #C8A96E 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-menu a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 0;
      position: relative;
      transition: color 0.2s;
    }
    .nav-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--red-accent);
      transition: width 0.25s ease;
    }
    .nav-menu a:hover {
      color: var(--gold);
    }
    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }
    .nav-menu a.active {
      color: #fff;
    }
    
    .mobile-toggle {
      display: none;
      font-size: 1.8rem;
      color: var(--gold);
      background: none;
      border: none;
    }
    
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(20, 20, 26, 0.95);
        backdrop-filter: blur(15px);
        border-radius: 40px;
        padding: 8px 20px;
        gap: 20px;
        border: 1px solid var(--gold-soft);
        box-shadow: 0 8px 20px rgba(0,0,0,0.5);
        width: auto;
        display: flex;
        justify-content: center;
        z-index: 999;
      }
      .nav-menu a {
        font-size: 0.8rem;
        padding: 4px 8px;
        white-space: nowrap;
      }
      .header {
        justify-content: center;
      }
      .mobile-toggle {
        display: none; /* 使用底部胶囊导航，隐藏汉堡 */
      }
    }
    
    /* ----- 通用板块样式 ----- */
    section {
      padding: 90px 0;
      position: relative;
    }
    
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
      text-align: center;
    }
    .section-subtitle {
      color: var(--text-secondary);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 48px;
      font-size: 1.1rem;
    }
    
    /* 卡片通用设计 */
    .card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .card:hover {
      border-color: var(--gold);
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0,0,0,0.6);
    }
    
    /* 按钮体系 */
    .btn-primary {
      background: var(--red-accent);
      color: #fff;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: var(--shadow-red);
      transition: background 0.2s, transform 0.2s;
      letter-spacing: 0.5px;
      border: none;
      font-size: 1rem;
    }
    .btn-primary:hover {
      background: var(--red-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(212,46,46,0.6);
    }
    
    .btn-outline {
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      padding: 14px 34px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline:hover {
      background: var(--gold);
      color: #1E1E24;
      border-color: var(--gold);
    }
    
    /* ----- Hero 首屏 ----- */
    .hero {
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      margin-top: 0;
      padding-top: 70px;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 50%, rgba(30,30,36,0.4) 0%, rgba(20,20,26,0.9) 90%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      width: 100%;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      color: #fff;
    }
    .hero h1 span {
      color: var(--gold);
    }
    .hero p {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 550px;
    }
    .hero-visual {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }
    .hero-visual img {
      max-height: 380px;
      filter: drop-shadow(0 0 30px rgba(200,169,110,0.3));
      border-radius: 20px;
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--text-muted);
      font-size: 0.9rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }
    
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.4rem;
      }
      .hero-visual {
        margin-top: 30px;
      }
      .section-title {
        font-size: 2rem;
      }
    }
    
    /* 痛点对比卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .pain-card.left {
      background: rgba(40,40,48,0.7);
      border-color: rgba(255,255,255,0.08);
    }
    .pain-card.right {
      border-left: 4px solid var(--red-accent);
      background: rgba(30,30,36,0.9);
    }
    
    /* 解决方案三列 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card img {
      width: 64px;
      height: 64px;
      margin-bottom: 20px;
      border-radius: 12px;
    }
    
    /* 成果数据 */
    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 30px;
      text-align: center;
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 800;
      color: var(--gold);
      line-height: 1.2;
    }
    
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-subtle);
      padding: 18px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #2a1215 0%, #1E1E24 100%);
      border-top: 1px solid var(--red-accent);
    }
    
    /* 页脚 */
    .footer {
      background: #0f0f13;
      padding: 40px 0;
      border-top: 1px solid rgba(200,169,110,0.2);
    }
    
    @media (max-width: 768px) {
      .pain-grid, .solutions-grid, .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
    }