/* roulang page: index */
:root {
      --primary: #0B3B2F;
      --primary-light: #0F4D3D;
      --primary-deep: #07251D;
      --accent-gold: #C9A96E;
      --accent-gold-light: #D4BA82;
      --cta-amber: #D4843A;
      --cta-amber-deep: #B86E2C;
      --bg-warm: #FAF8F5;
      --bg-card: #FFFFFF;
      --bg-light-green: #EDF3F1;
      --text-main: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8C8C8C;
      --text-on-dark: #F5F0E8;
      --border-light: #E8E3DC;
      --shadow-sm: 0 4px 12px rgba(11, 59, 47, 0.04);
      --shadow-card: 0 8px 30px rgba(11, 59, 47, 0.08);
      --shadow-btn: 0 6px 20px rgba(212, 132, 58, 0.25);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --transition-base: 0.25s ease;
      --transition-smooth: 0.3s cubic-bezier(0.2, 0.0, 0, 1.0);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    h1, h2, h3 {
      color: var(--text-main);
      font-weight: 600;
      letter-spacing: -0.01em;
    }

    h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-number);
      font-weight: 600;
      border: none;
      border-radius: var(--radius-sm);
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--cta-amber);
      color: white;
      padding: 14px 32px;
      font-size: 1rem;
      box-shadow: var(--shadow-btn);
    }

    .btn-primary:hover {
      background-color: var(--cta-amber-deep);
      transform: scale(1.02);
      box-shadow: 0 10px 28px rgba(212, 132, 58, 0.35);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      font-size: 1rem;
    }

    .btn-outline:hover {
      background-color: rgba(11, 59, 47, 0.04);
      border-color: var(--primary-light);
    }

    .text-accent {
      color: var(--accent-gold);
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: 72px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: var(--transition-smooth);
    }

    .header.scrolled {
      background: rgba(255, 255, 255, 0.92);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--primary);
      clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-gold);
      font-size: 1.2rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-body);
      transition: color 0.2s;
      font-size: 0.95rem;
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary);
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-content {
      flex: 0 0 58%;
    }

    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: var(--text-main);
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 2rem;
    }

    .hero-actions {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .hero-visual {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      min-height: 360px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .stats-board {
      background: rgba(255,255,255,0.9);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 24px;
      position: absolute;
      bottom: 24px;
      right: 24px;
      left: 24px;
      display: flex;
      justify-content: space-around;
      box-shadow: var(--shadow-sm);
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
    }

    .stat-label {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }

    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
    }

    .icon-gold {
      color: var(--accent-gold);
      font-size: 2rem;
      margin-bottom: 1.2rem;
    }

    /* 对比 */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 24px;
      align-items: center;
    }

    .compare-card {
      padding: 40px 32px;
      border-radius: var(--radius-md);
    }

    .compare-before {
      background: #f5f3f0;
      color: var(--text-muted);
    }

    .compare-after {
      background: #eaf3ef;
      border: 1px solid var(--primary-light);
    }

    .vs-badge {
      font-weight: 700;
      color: var(--accent-gold);
      font-size: 2rem;
    }

    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
    }

    .step {
      text-align: center;
      flex: 1;
    }

    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 1rem;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1.2rem 0;
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--text-main);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-body);
    }

    .faq-item.active .faq-answer {
      max-height: 160px;
      margin-top: 0.8rem;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #07251D 0%, #0B3B2F 100%);
      color: var(--text-on-dark);
      border-radius: 0;
    }

    .form-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 40px;
      max-width: 480px;
      margin: 0 auto;
      color: var(--text-main);
    }

    .input-group {
      margin-bottom: 1.2rem;
    }

    .input-group input {
      width: 100%;
      padding: 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-family: var(--font-sans);
    }

    /* Footer */
    .footer {
      background: var(--primary-deep);
      color: var(--text-on-dark);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .mobile-menu {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        padding: 24px;
        gap: 20px;
        box-shadow: 0 20px 30px rgba(0,0,0,0.1);
      }
      .grid-3, .comparison-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .steps {
        flex-direction: column;
        gap: 30px;
      }
    }