/* roulang page: index */
:root {
      --green-main: #1B8E3F;
      --black-tactical: #1A1A2E;
      --orange-passion: #F15A24;
      --bg-light: #F9F9F5;
      --text-dark: #2D2D2D;
      --text-on-dark: #FFFFFF;
      --border-soft: #D0E0D0;
      --card-bg: #FFFFFF;
      --card-shadow: 0 4px 12px rgba(0,0,0,0.06);
      --card-shadow-hover: 0 12px 28px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-input: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      --transition-smooth: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-card);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 600;
      letter-spacing: 0.03em;
      border-radius: var(--radius-btn);
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
    }

    /* 顶部信息条 */
    .top-bar {
      background-color: var(--black-tactical);
      color: #ccc;
      font-size: 0.8rem;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      letter-spacing: 0.3px;
    }
    .top-bar .domain {
      color: #aaa;
    }
    .top-bar .action-link {
      color: #ddd;
      margin-left: 24px;
      font-weight: 500;
    }
    .top-bar .action-link:hover {
      color: var(--orange-passion);
    }

    /* 主导航 */
    .main-nav {
      background: white;
      height: 68px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      box-shadow: 0 4px 14px rgba(0,0,0,0.03);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(8px);
      background: rgba(255,255,255,0.92);
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-icon {
      font-size: 2rem;
      color: var(--green-main);
    }
    .logo-text {
      font-weight: 800;
      font-size: 1.6rem;
      letter-spacing: -0.5px;
      color: var(--black-tactical);
    }
    .logo-text span {
      color: var(--green-main);
    }
    .nav-links {
      display: flex;
      gap: 2.2rem;
      font-weight: 600;
      color: #2c2c2c;
    }
    .nav-links a {
      position: relative;
      padding: 8px 0;
      font-size: 1rem;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--green-main);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--green-main);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      background: none;
      border: none;
      color: var(--black-tactical);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--black-tactical);
    }
    .section-sub {
      text-align: center;
      color: #4a4a4a;
      max-width: 640px;
      margin: 0 auto 48px;
      font-size: 1.1rem;
    }

    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      gap: 3rem;
      background: linear-gradient(135deg, #f4f9f4 0%, #eaf3ea 100%);
      min-height: 80vh;
      padding: 0 0 0 0;
    }
    .hero-content {
      flex: 1 1 50%;
      padding-left: 24px;
    }
    .hero h1 {
      font-size: clamp(2.8rem, 6vw, 4.2rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      color: var(--black-tactical);
    }
    .hero h1 .green {
      color: var(--green-main);
    }
    .hero p {
      font-size: 1.2rem;
      margin: 1.8rem 0 2.5rem;
      color: #333;
    }
    .hero-visual {
      flex: 1 1 45%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 500px;
      border-radius: 24px 0 0 24px;
      position: relative;
      box-shadow: -8px 0 30px rgba(0,0,0,0.1);
    }
    .btn-primary {
      background: var(--orange-passion);
      color: white;
      padding: 14px 34px;
      font-size: 1rem;
      box-shadow: 0 6px 14px rgba(241,90,36,0.3);
    }
    .btn-primary:hover {
      background: #d94a1a;
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(241,90,36,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--green-main);
      color: var(--green-main);
      padding: 14px 34px;
      margin-left: 16px;
    }
    .btn-outline:hover {
      background: var(--green-main);
      color: white;
      border-color: var(--green-main);
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 20px;
    }
    .highlight-card {
      background: white;
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      text-align: left;
      border: 1px solid #e8ede8;
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    .icon-circle {
      width: 52px;
      height: 52px;
      background: rgba(27,142,63,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      color: var(--green-main);
      margin-bottom: 1.6rem;
      transition: 0.2s;
    }
    .highlight-card:hover .icon-circle {
      background: rgba(241,90,36,0.1);
      color: var(--orange-passion);
    }
    .highlight-card h3 {
      font-size: 1.5rem;
      font-weight: 650;
      margin-bottom: 0.6rem;
    }

    /* 案例瀑布流 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
      background: #1e1e2a;
      color: white;
      box-shadow: var(--card-shadow);
    }
    .case-card img {
      width: 100%;
      height: 260px;
      object-fit: cover;
      opacity: 0.9;
      transition: 0.3s;
    }
    .case-card:hover img {
      transform: scale(1.04);
    }
    .case-info {
      padding: 20px;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      position: absolute;
      bottom: 0;
      width: 100%;
    }
    .case-info h4 {
      font-size: 1.3rem;
      color: white;
    }
    .dark-section {
      background: var(--black-tactical);
      color: white;
    }

    /* 方案对比 */
    .comparison-row {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .plan-card {
      background: white;
      flex: 1 1 280px;
      max-width: 320px;
      border-radius: var(--radius-card);
      padding: 36px 24px;
      box-shadow: var(--card-shadow);
      text-align: center;
      border: 1px solid #e8ede8;
    }
    .plan-card h3 {
      font-size: 1.8rem;
      margin-bottom: 0.5rem;
    }
    .price {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--green-main);
    }
    .feature-list {
      list-style: none;
      margin: 28px 0;
      text-align: left;
    }
    .feature-list li {
      padding: 8px 0;
      border-bottom: 1px solid #eee;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: white;
      border: 1px solid #d0e0d0;
      border-radius: 12px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      background: #f9fcf9;
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: #333;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 联系 */
    .contact-form {
      max-width: 600px;
      margin: 0 auto;
      background: white;
      padding: 40px;
      border-radius: 24px;
      box-shadow: var(--card-shadow);
    }
    .form-group input, .form-group textarea {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid #d0e0d0;
      border-radius: var(--radius-input);
      font-family: inherit;
      margin-top: 8px;
    }
    .form-group input:focus, .form-group textarea:focus {
      border-color: var(--green-main);
      box-shadow: 0 0 0 3px rgba(27,142,63,0.15);
      outline: none;
    }

    footer {
      background: var(--black-tactical);
      color: #b0b0b0;
      padding: 70px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer-logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: white;
    }
    .footer a:hover { color: var(--orange-passion); }

    @media (max-width: 1024px) {
      .hero { flex-direction: column; }
      .hero-visual { width: 100%; border-radius: 0; min-height: 350px; }
      .cases-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .highlights-grid, .cases-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-content { padding: 40px 20px; }
    }