/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --deep-forest: #0A1C1A;
      --muted-gold: #C5A46B;
      --champagne: #F2EBE1;
      --bronze: #8B6F47;
      --amber-orange: #D98C2E;
      --amber-dark: #B8741E;
      --white: #FFFFFF;
      --soft-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
      --hover-shadow: 0 14px 32px rgba(0, 0, 0, 0.14);
      --border-gold: rgba(197, 164, 107, 0.25);
      --radius-card: 10px;
      --radius-btn: 8px;
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-mono: 'Inter', monospace;
      --transition: all 0.25s ease;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-forest);
      color: #E5E0D5;
      line-height: 1.7;
      font-size: 16px;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 500;
      transition: var(--transition);
      border: none;
      outline: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-primary {
      background: var(--amber-orange);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 12px rgba(217, 140, 46, 0.25);
    }
    .btn-primary:hover {
      background: var(--amber-dark);
      box-shadow: 0 8px 20px rgba(184, 116, 30, 0.35);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--muted-gold);
      color: var(--muted-gold);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 500;
    }
    .btn-outline:hover {
      background: var(--muted-gold);
      color: var(--deep-forest);
      border-color: var(--muted-gold);
    }
    .section {
      padding: 90px 0;
    }
    h1, h2, h3 {
      font-family: var(--font-serif);
      font-weight: 700;
      line-height: 1.25;
      color: #F5F0E8;
    }
    h1 {
      font-size: clamp(2.8rem, 6vw, 4.2rem);
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: clamp(2.2rem, 4.5vw, 3rem);
      margin-bottom: 20px;
      color: var(--muted-gold);
    }
    h3 {
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--deep-forest);
    }
    .text-muted {
      color: #b7a98a;
    }
    .bg-champagne {
      background-color: var(--champagne);
      color: #1E2A28;
    }
    .bg-champagne h3, .bg-champagne h2 {
      color: var(--deep-forest);
    }
    .bg-champagne .text-muted {
      color: #5f5542;
    }
    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 28, 26, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-gold);
      z-index: 1000;
      padding: 0 24px;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1320px;
      margin: 0 auto;
      height: 72px;
    }
    .logo {
      font-family: var(--font-serif);
      font-size: 2rem;
      font-weight: 700;
      color: var(--muted-gold);
      letter-spacing: 1px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 40px;
      align-items: center;
    }
    .nav-links a {
      color: #E5DDD0;
      font-weight: 500;
      font-size: 1.05rem;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--muted-gold);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .search-box {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(197,164,107,0.35);
      border-radius: 30px;
      padding: 8px 18px;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      transition: var(--transition);
    }
    .search-box i {
      color: var(--muted-gold);
    }
    .search-box input {
      background: transparent;
      border: none;
      color: white;
      width: 110px;
      outline: none;
      font-family: var(--font-sans);
    }
    .search-box input::placeholder {
      color: #b1a58d;
    }
    .hamburger {
      display: none;
      font-size: 1.7rem;
      color: var(--muted-gold);
      background: none;
      border: none;
    }
    @media (max-width: 1024px) {
      .nav-links {
        gap: 24px;
      }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-box {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .nav-actions .btn-primary {
        padding: 10px 20px;
      }
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1E3A32, #0A1C1A 80%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 480px;
    }
    .hero-text h1 {
      color: #F2EBE1;
      margin-bottom: 24px;
      font-weight: 700;
    }
    .hero-sub {
      font-family: var(--font-serif);
      font-size: 1.35rem;
      color: #C5B391;
      margin-bottom: 32px;
    }
    .hero-image {
      flex: 1 1 400px;
      position: relative;
    }
    .hero-image img {
      border-radius: 24px;
      box-shadow: 0 30px 50px rgba(0,0,0,0.5);
      border: 1px solid var(--border-gold);
    }
    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
    }
    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .advantage-card {
      background: var(--champagne);
      border-radius: var(--radius-card);
      padding: 40px 24px;
      text-align: center;
      box-shadow: var(--soft-shadow);
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .advantage-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--hover-shadow);
      border-color: var(--muted-gold);
    }
    .advantage-icon {
      font-size: 2.6rem;
      color: var(--muted-gold);
      margin-bottom: 20px;
    }
    /* 叙事流程 */
    .narrative-flow {
      display: flex;
      flex-direction: column;
      gap: 32px;
    }
    .step-row {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }
    .step-pain {
      flex: 1;
      background: #0F2622;
      padding: 24px;
      border-radius: 12px;
      color: #F2EBE1;
    }
    .step-solution {
      flex: 1;
      background: var(--champagne);
      padding: 24px;
      border-radius: 12px;
      color: var(--deep-forest);
    }
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(4px);
      border-left: 5px solid var(--muted-gold);
      padding: 28px;
      border-radius: 10px;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(197,164,107,0.25);
    }
    .faq-question {
      background: transparent;
      width: 100%;
      text-align: left;
      padding: 24px 8px;
      font-weight: 600;
      font-size: 1.2rem;
      color: var(--muted-gold);
      display: flex;
      justify-content: space-between;
      border: none;
    }
    .faq-answer {
      padding: 0 8px 24px;
      color: #ddd6c8;
    }
    /* 页脚 */
    .footer {
      background: #051210;
      color: #c0b59b;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .grid-3, .testimonial-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
    }