/* roulang page: index */
:root {
      --deep-green: #0B1E1A;
      --amber-gold: #D4A843;
      --gold-light: #E0B84D;
      --warm-white: #F7F5F0;
      --body-text: #2C3A37;
      --muted-text: #6B7A76;
      --card-bg: #FFFFFF;
      --card-border: #E8E3D9;
      --shadow-card: 0 4px 24px rgba(11, 30, 26, 0.06);
      --shadow-card-hover: 0 8px 40px rgba(11, 30, 26, 0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--warm-white);
      color: var(--body-text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      z-index: 50;
      transition: box-shadow 0.3s ease, background 0.3s ease;
      padding: 16px 0;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      background: #ffffff;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--deep-green);
    }
    .logo-text span {
      color: var(--amber-gold);
    }
    .nav-links {
      display: flex;
      gap: 2.5rem;
      align-items: center;
      font-weight: 500;
      color: var(--deep-green);
    }
    .nav-links a {
      transition: color 0.2s;
      font-size: 1rem;
    }
    .nav-links a:hover {
      color: var(--amber-gold);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--deep-green);
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(11,30,26,0.96);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      transform: translateY(-100%);
      transition: transform 0.4s ease;
      z-index: 40;
      color: white;
      font-size: 1.5rem;
    }
    .mobile-menu.active {
      transform: translateY(0);
    }
    .mobile-menu a {
      color: white;
      font-weight: 600;
    }
    .close-mobile {
      position: absolute;
      top: 24px;
      right: 24px;
      background: none;
      border: none;
      font-size: 2rem;
      color: white;
      cursor: pointer;
    }
    /* 板块间距 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--deep-green);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--muted-text);
      font-size: 1.125rem;
      margin-bottom: 48px;
    }
    /* Hero */
    .hero {
      padding-top: 130px;
      padding-bottom: 80px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(247,245,240,0.7);
      backdrop-filter: blur(2px);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      color: var(--deep-green);
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }
    .hero-left .sub {
      font-size: 1.2rem;
      color: var(--body-text);
      margin-bottom: 2rem;
    }
    .btn-gold {
      background: var(--amber-gold);
      color: var(--deep-green);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      font-size: 1rem;
      transition: 0.3s ease;
      display: inline-block;
    }
    .btn-gold:hover {
      background: var(--gold-light);
      transform: scale(1.02);
    }
    .metrics {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .metric-card {
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-card);
      padding: 16px 20px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--card-border);
      min-width: 100px;
    }
    .metric-value {
      font-family: 'Courier New', monospace;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--deep-green);
    }
    .metric-label {
      font-size: 0.8rem;
      color: var(--muted-text);
    }
    /* 服务矩阵 2x3 不对称 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }
    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-left: 4px solid var(--amber-gold);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .service-card i {
      color: var(--amber-gold);
      font-size: 2rem;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.375rem;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .service-card p {
      color: var(--muted-text);
      margin-bottom: 20px;
      flex:1;
    }
    .text-link {
      color: var(--amber-gold);
      font-weight: 600;
      transition: 0.2s;
    }
    .text-link:hover {
      text-decoration: underline;
    }
    /* 对比模块 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 1.5rem;
      align-items: center;
    }
    .vs-divider {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--amber-gold);
    }
    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .compare-card.traditional {
      background: #f2f0eb;
      border: 1px solid #ddd8cc;
    }
    .compare-card.j9 {
      border: 2px solid var(--amber-gold);
      background: white;
    }
    .compare-value {
      font-family: monospace;
      font-size: 2rem;
      font-weight: 700;
    }
    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      position: relative;
      margin-top: 30px;
    }
    .step {
      text-align: center;
      flex:1;
      position: relative;
    }
    .step-icon {
      width: 60px;
      height: 60px;
      background: var(--deep-green);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 15px;
      font-size: 1.5rem;
    }
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      padding: 18px 24px;
      border:1px solid var(--card-border);
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--muted-text);
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    /* CTA */
    .cta-dark {
      background: var(--deep-green);
      color: white;
      padding: 80px 0;
    }
    .cta-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .cta-form input {
      padding: 14px;
      border-radius: var(--radius-btn);
      border: none;
      min-width: 250px;
    }
    .footer {
      background: var(--deep-green);
      color: #cccccc;
      padding: 24px 0;
    }
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .vs-divider { display: none; }
      .faq-grid { grid-template-columns: 1fr; }
      .steps { flex-direction: column; gap: 30px; }
      h1 { font-size: 2rem !important; }
    }