/* roulang page: index */
:root {
      --primary-deep: #1E1E1E;
      --accent-gold: #D4A843;
      --accent-gold-dark: #B88D2E;
      --accent-gold-deeper: #9E7622;
      --bg-warm-light: #F7F5F0;
      --bg-khaki: #EDE7DB;
      --white: #FFFFFF;
      --text-dark: #2B2B2B;
      --text-body: #4A4A4A;
      --text-muted: #6B6B6B;
      --text-light: #B0B0B0;
      --border-light: #E5E0D8;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
      --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: var(--font-sans);
      color: var(--primary-deep);
      font-weight: 700;
      letter-spacing: -0.25px;
    }

    p {
      font-family: var(--font-serif);
      font-size: 1rem;
      line-height: 1.8;
      color: var(--text-body);
      max-width: 68ch;
    }

    .text-muted {
      color: var(--text-muted) !important;
    }

    a {
      color: var(--primary-deep);
      transition: color 0.2s ease, border-color 0.2s ease;
      text-decoration: none;
    }

    a:hover {
      color: var(--accent-gold);
    }

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

    .btn:focus, .form-control:focus, .accordion-button:focus {
      box-shadow: 0 0 0 0.2rem rgba(212, 168, 67, 0.3);
      border-color: var(--accent-gold);
      outline: 0;
    }

    /* 导航 */
    .navbar {
      background-color: var(--white);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
      padding: 0.75rem 0;
      transition: all 0.25s ease;
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--primary-deep) !important;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      letter-spacing: -0.3px;
    }

    .navbar-brand i {
      color: var(--accent-gold);
      font-size: 1.8rem;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: #4A4A4A !important;
      margin: 0 0.3rem;
      padding: 0.5rem 0.8rem !important;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--accent-gold) !important;
      border-bottom: 2px solid var(--accent-gold);
    }

    .search-box {
      background: #F5F3EF;
      border-radius: 20px;
      padding: 0.35rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      border: 1px solid transparent;
      transition: all 0.2s;
    }

    .search-box i {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 0.9rem;
      width: 100px;
      color: var(--primary-deep);
    }

    .search-box:focus-within {
      border-color: var(--accent-gold);
      background: var(--white);
    }

    .btn-primary-gold {
      background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
      border: none;
      color: var(--white);
      font-weight: 600;
      padding: 0.6rem 1.6rem;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
      box-shadow: 0 4px 10px rgba(212, 168, 67, 0.25);
      letter-spacing: 0.3px;
    }

    .btn-primary-gold:hover {
      background: var(--accent-gold-deeper);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(212, 168, 67, 0.35);
      color: white;
    }

    .btn-outline-gold {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 600;
      padding: 0.6rem 1.6rem;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
    }

    .btn-outline-gold:hover {
      background: var(--accent-gold);
      color: white;
      transform: translateY(-2px);
    }

    .btn-light-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-btn);
      transition: all 0.25s;
    }

    .btn-light-outline:hover {
      background: white;
      color: var(--accent-gold-dark);
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(90deg, var(--bg-warm-light) 60%, rgba(212,168,67,0.08) 60%);
      position: relative;
      overflow: hidden;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }

    .hero-bg-image {
      position: absolute;
      right: 0;
      top: 0;
      width: 40%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.9;
    }

    .hero-bg-overlay {
      position: absolute;
      right: 0;
      top: 0;
      width: 40%;
      height: 100%;
      background: rgba(212, 168, 67, 0.12);
      mix-blend-mode: multiply;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 540px;
    }

    .hero-content h1 {
      font-family: var(--font-sans);
      font-weight: 900;
      font-size: 3.4rem;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: var(--primary-deep);
    }

    .hero-sub {
      font-family: var(--font-serif);
      font-size: 1.25rem;
      color: var(--text-body);
      margin: 1.5rem 0 2rem;
    }

    /* 通用板块 */
    .section-padding {
      padding: 5rem 0;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--primary-deep);
    }

    .card-custom {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      border: 1px solid transparent;
      transition: all 0.3s ease;
      height: 100%;
    }

    .card-custom:hover {
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-gold);
      transform: translateY(-3px);
    }

    .icon-gold {
      color: var(--accent-gold);
      font-size: 2.5rem;
      margin-bottom: 1.2rem;
    }

    /* 痛点宽幅卡片 */
    .pain-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem 2.2rem;
      margin-bottom: 2rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: flex-start;
      gap: 2rem;
      border-left: 4px solid var(--accent-gold);
      transition: 0.2s;
    }

    .pain-card:hover {
      box-shadow: var(--shadow-md);
    }

    /* 解决方案图文卡 */
    .solution-card img {
      border-radius: var(--radius-card) var(--radius-card) 0 0;
      height: 180px;
      object-fit: cover;
      filter: grayscale(30%) sepia(10%);
      transition: filter 0.4s, transform 0.3s;
    }

    .solution-card:hover img {
      filter: grayscale(0%) sepia(0%);
      transform: scale(1.02);
    }

    .solution-card .card-body {
      padding: 1.5rem 1.2rem;
    }

    /* 深色数据块 */
    .dark-block {
      background-color: var(--primary-deep);
      color: white;
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.1;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-khaki);
      border-radius: var(--radius-card);
      padding: 2rem;
    }

    .faq-accordion .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      background: transparent;
    }

    .faq-accordion .accordion-button {
      font-weight: 600;
      font-size: 1.05rem;
      background: var(--white);
      color: var(--primary-deep);
      box-shadow: none;
      padding: 1.2rem 1.5rem;
    }

    .faq-accordion .accordion-button:not(.collapsed) {
      color: var(--accent-gold);
      background: var(--white);
    }

    .faq-accordion .accordion-button::after {
      color: var(--accent-gold);
    }

    /* CTA区块 */
    .cta-gradient {
      background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
    }

    .footer-dark {
      background: var(--primary-deep);
      color: var(--text-light);
    }

    .footer-dark a {
      color: var(--text-light);
    }

    .footer-dark a:hover {
      color: var(--accent-gold);
    }

    @media (max-width: 992px) {
      .hero-section {
        flex-direction: column;
        background: var(--bg-warm-light);
      }
      .hero-bg-image, .hero-bg-overlay {
        position: relative;
        width: 100%;
        height: 280px;
        right: auto;
      }
      .hero-content {
        max-width: 100%;
        padding: 2rem 1rem;
        text-align: center;
      }
      .hero-content h1 {
        font-size: 2.4rem;
      }
      .pain-card {
        flex-direction: column;
        gap: 0.8rem;
      }
    }

    @media (max-width: 768px) {
      .section-title {
        font-size: 1.8rem;
      }
      .stat-number {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 576px) {
      .hero-content h1 {
        font-size: 2.2rem;
      }
      .btn-primary-gold, .btn-outline-gold {
        width: 100%;
        margin-bottom: 0.5rem;
      }
    }