/* roulang page: index */
:root {
      --deep-purple: #3D1E4A;
      --electric-orange: #FF6B35;
      --dark-gold: #C9A96E;
      --bg-light: #FAF9F7;
      --white: #FFFFFF;
      --text-dark: #2D2D2D;
      --text-gray: #6B6B6B;
      --border-light: #F0EBF5;
      --shadow-sm: 0 4px 20px rgba(61,30,74,0.08);
      --shadow-md: 0 8px 30px rgba(61,30,74,0.15);
      --radius-lg: 12px;
      --radius-md: 8px;
      --font-title: 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --container-max: 1200px;
      --section-padding: 100px;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 600;
      line-height: 1.3;
    }

    h2 {
      font-size: 2.25rem;
      margin-bottom: 1rem;
      color: var(--deep-purple);
      letter-spacing: -0.3px;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.25rem;
    }

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

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

    /* 按钮系统 */
    .btn {
      display: inline-block;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      cursor: pointer;
      font-family: var(--font-title);
      letter-spacing: 0.3px;
    }

    .btn-primary {
      background-color: var(--electric-orange);
      color: #fff;
      padding: 0.875rem 2rem;
      border: 2px solid var(--electric-orange);
      box-shadow: 0 4px 12px rgba(255,107,53,0.25);
    }

    .btn-primary:hover {
      background-color: #FF8C5A;
      border-color: #FF8C5A;
      box-shadow: 0 0 20px rgba(255,107,53,0.5);
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--deep-purple);
      color: var(--deep-purple);
      padding: 0.875rem 2rem;
    }

    .btn-outline:hover {
      background-color: #F3EAF7;
    }

    .btn-light-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 0.875rem 2rem;
    }

    .btn-light-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: #fff;
    }

    .btn-lg {
      padding: 1.125rem 3rem;
      font-size: 1.15rem;
      border-radius: 50px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--white);
      z-index: 1000;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 0 1.25rem;
    }

    .header-inner {
      max-width: var(--container-max);
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .logo {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--deep-purple);
      display: flex;
      align-items: center;
      gap: 0.3rem;
    }

    .logo i {
      font-size: 1.8rem;
      color: var(--electric-orange);
    }

    .nav-menu {
      display: flex;
      gap: 2rem;
      list-style: none;
    }

    .nav-menu a {
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding-bottom: 4px;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--electric-orange);
      transition: width 0.2s ease;
    }

    .nav-menu a:hover {
      color: var(--electric-orange);
    }

    .nav-menu a:hover::after {
      width: 100%;
    }

    .header-cta {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--deep-purple);
      cursor: pointer;
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 650px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      margin-top: 0;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(61,30,74,0.88) 0%, rgba(20,10,28,0.93) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      color: white;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
      text-shadow: 0 2px 10px rgba(0,0,0,0.5);
    }

    .hero-sub {
      font-size: 1.25rem;
      color: #E0D3B8;
      margin-bottom: 2rem;
    }

    .hero-actions {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .floating-card {
      position: absolute;
      right: 2rem;
      bottom: 10%;
      background: rgba(255,255,255,0.07);
      backdrop-filter: blur(12px);
      border: 1px solid var(--dark-gold);
      border-radius: 12px;
      padding: 1rem 1.8rem;
      color: white;
      font-weight: 600;
    }

    /* 板块共用 */
    section {
      padding: var(--section-padding) 1.25rem;
    }

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

    .grid-3, .grid-2 {
      display: grid;
      gap: 24px;
    }
    .grid-3 { grid-template-columns: repeat(3,1fr); }
    .grid-2 { grid-template-columns: repeat(2,1fr); }

    .card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 2rem 1.5rem;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .pain-card i {
      font-size: 2.5rem;
      color: var(--electric-orange);
      margin-bottom: 1rem;
    }

    .solution-img {
      border-radius: 8px;
      border: 1px solid var(--dark-gold);
      aspect-ratio: 16/9;
      object-fit: cover;
      margin-bottom: 1.2rem;
    }

    .data-highlight {
      font-family: 'Inter', sans-serif;
      font-weight: 700;
      font-size: 3rem;
      color: var(--electric-orange);
    }

    /* 背景条 */
    .bg-light-purple {
      background-color: #F3EAF7;
    }

    /* FAQ */
    .faq-item {
      background: var(--white);
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      font-weight: 600;
      padding: 1.2rem 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      color: var(--deep-purple);
    }

    /* CTA深色 */
    .dark-cta {
      background: linear-gradient(135deg, #3D1E4A 0%, #1A0A20 100%);
      text-align: center;
    }

    footer {
      background: #2D1538;
      color: white;
      padding: 3rem 1.25rem 1.5rem;
    }

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

    @media (max-width: 768px) {
      :root { --section-padding: 60px; }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
      .hamburger { display: block; }
      .header-cta .btn { display: none; }
      .hero h1 { font-size: 2.2rem; }
      .floating-card { right: 1rem; bottom: 5%; padding: 0.7rem 1.2rem; font-size: 0.9rem; }
      section { padding: 3rem 1rem; }
    }