/* roulang page: index */
:root {
      --primary-green: #0F5C4B;
      --accent-gold: #E8A838;
      --bg-warm: #FDF9F2;
      --dark-bg: #1A3C34;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --border-light: #E5DDD3;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(15,92,75,0.06);
      --card-hover-shadow: 0 8px 30px rgba(15,92,75,0.12);
      --radius-card: 16px;
      --radius-pill: 50px;
      --radius-input: 8px;
      --transition: 0.25s ease;
      --font-heading: 'Noto Sans SC', sans-serif;
      --font-body: 'Noto Sans SC', sans-serif;
      --font-en: 'Inter', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.8;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      color: var(--primary-green);
      font-weight: 700;
    }
    h1 {
      font-size: 42px;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 32px;
      line-height: 1.3;
      margin-bottom: 16px;
      position: relative;
    }
    h2::after {
      content: '';
      display: block;
      width: 40px;
      height: 8px;
      background-color: var(--accent-gold);
      margin-top: 12px;
      border-radius: 4px;
    }
    h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--primary-green);
    }
    p {
      color: var(--text-dark);
      margin-bottom: 1rem;
    }
    a {
      color: var(--primary-green);
      text-decoration: none;
      transition: color var(--transition);
    }
    a:hover {
      color: var(--accent-gold);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航悬浮胶囊 */
    .nav-capsule {
      background: rgba(253, 249, 242, 0.9);
      backdrop-filter: blur(12px);
      border-radius: 60px;
      padding: 12px 32px;
      box-shadow: 0 2px 16px rgba(0,0,0,0.04);
      max-width: 1100px;
      margin: 24px auto 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 24px;
      z-index: 999;
      width: 94%;
    }
    .brand {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-green);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
      margin: 0;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-dark);
      font-size: 16px;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }
    .nav-links a:hover {
      color: var(--accent-gold);
      border-bottom-color: var(--accent-gold);
    }
    .btn-primary {
      background: var(--accent-gold);
      color: var(--white);
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 16px;
      border: none;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition);
      display: inline-block;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: #C8891F;
      color: var(--white);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all var(--transition);
      display: inline-block;
      white-space: nowrap;
    }
    .btn-secondary:hover {
      background: var(--primary-green);
      color: var(--white);
    }
    /* 汉堡菜单隐藏桌面 */
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--primary-green);
      background: none;
      border: none;
      cursor: pointer;
    }
    /* 区块通用 */
    section {
      padding: 120px 0;
      scroll-margin-top: 100px;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      display: inline-block;
    }
    .bg-dark {
      background-color: var(--dark-bg);
    }
    .bg-dark h2, .bg-dark h3, .bg-dark p, .bg-dark .faq-question {
      color: var(--white);
    }
    .bg-dark h2::after {
      background-color: var(--accent-gold);
    }
    /* 卡片 */
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      padding: 32px;
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    .card-icon {
      font-size: 40px;
      color: var(--accent-gold);
      margin-bottom: 20px;
    }
    /* Hero */
    #hero {
      padding-top: 60px;
      padding-bottom: 100px;
      background-color: var(--bg-warm);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-left {
      flex: 0 0 55%;
    }
    .hero-right {
      flex: 0 0 45%;
      position: relative;
    }
    .hero-right img {
      border-radius: 24px;
      box-shadow: 0 15px 40px rgba(0,0,0,0.08);
      width: 100%;
      height: auto;
    }
    .hero-right::before {
      content: '';
      position: absolute;
      top: 20px;
      left: 20px;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle, rgba(232,168,56,0.15) 0%, rgba(253,249,242,0) 70%);
      border-radius: 24px;
      z-index: 0;
    }
    .hero-right img {
      position: relative;
      z-index: 1;
    }
    .trust-badges {
      display: flex;
      gap: 24px;
      margin-top: 24px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .trust-badges i {
      color: var(--accent-gold);
      margin-right: 6px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      margin-top: 32px;
      flex-wrap: wrap;
    }
    /* 网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    /* 服务卡片 */
    .service-card img {
      border-radius: 16px 16px 0 0;
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .service-card .card-content {
      padding: 24px;
      background: var(--white);
      border-radius: 0 0 16px 16px;
    }
    .text-link {
      color: var(--accent-gold);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 12px;
    }
    /* 流程 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .step-card {
      position: relative;
      padding: 24px;
    }
    .step-number {
      font-size: 64px;
      font-weight: 700;
      color: rgba(232,168,56,0.2);
      position: absolute;
      top: -20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 0;
      font-family: var(--font-en);
    }
    .step-title {
      font-weight: 600;
      font-size: 18px;
      margin: 20px 0 8px;
      position: relative;
      z-index: 1;
    }
    /* 案例瀑布流 */
    .masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: start;
    }
    .case-item {
      border-radius: var(--radius-card);
      overflow: hidden;
      position: relative;
      box-shadow: var(--card-shadow);
      transition: transform 0.3s;
    }
    .case-item img {
      width: 100%;
      height: auto;
      display: block;
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      color: white;
      padding: 24px 16px 16px;
    }
    .case-overlay h4 {
      color: white;
      font-size: 18px;
      margin-bottom: 4px;
    }
    .case-tag {
      font-size: 13px;
      background: rgba(232,168,56,0.8);
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-block;
    }
    .case-item:hover {
      transform: scale(1.02);
    }
    /* FAQ 手风琴 */
    .accordion-item {
      border-bottom: 1px solid rgba(255,255,255,0.2);
    }
    .accordion-title {
      font-weight: 500;
      font-size: 18px;
      padding: 20px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: white;
    }
    .accordion-content {
      padding-bottom: 20px;
      color: rgba(255,255,255,0.85);
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    .accordion-icon {
      color: var(--accent-gold);
      font-size: 22px;
    }
    /* 表单 */
    .contact-form input, .contact-form textarea {
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      background: var(--white);
      padding: 14px 16px;
      width: 100%;
      margin-bottom: 16px;
      font-family: var(--font-body);
    }
    .contact-form input:focus, .contact-form textarea:focus {
      outline: none;
      border-color: var(--primary-green);
      box-shadow: 0 0 0 3px rgba(15,92,75,0.1);
    }
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      color: var(--white);
    }
    .footer-grid h4 {
      color: var(--white);
      margin-bottom: 16px;
      font-size: 18px;
    }
    .footer-grid a {
      color: rgba(255,255,255,0.8);
      display: block;
      margin-bottom: 8px;
    }
    .footer-grid a:hover {
      color: var(--accent-gold);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.15);
      margin-top: 48px;
      padding-top: 24px;
      text-align: center;
      color: rgba(255,255,255,0.7);
      font-size: 14px;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .grid-3, .masonry { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .hero-grid { flex-direction: column; }
      .hero-left, .hero-right { flex: auto; width: 100%; }
    }
    @media (max-width: 768px) {
      .nav-capsule { padding: 12px 20px; width: 96%; }
      .nav-links { display: none; flex-direction: column; position: absolute; top: 70px; left: 20px; right: 20px; background: rgba(253,249,242,0.98); backdrop-filter: blur(16px); border-radius: 24px; padding: 24px; box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
      .nav-links.active { display: flex; }
      .hamburger { display: block; }
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .grid-3, .grid-2, .masonry, .process-steps, .footer-grid { grid-template-columns: 1fr; }
      section { padding: 80px 0; }
      .hero-buttons .btn-primary, .hero-buttons .btn-secondary { width: 100%; text-align: center; }
      .card:hover { transform: none; }
      .case-item:hover { transform: none; }
    }
    @media (max-width: 520px) {
      .brand { font-size: 20px; }
      .trust-badges { flex-direction: column; gap: 8px; }
    }