/* roulang page: index */
:root {
      --primary: #3E2C23;
      --primary-hover: #2E1F18;
      --accent: #C8A96E;
      --accent-light: rgba(200, 169, 110, 0.15);
      --bg-warm: #FAF7F2;
      --dark-bg: #1E1A17;
      --text-primary: #3A3A3A;
      --text-muted: #8C8279;
      --border-soft: #E5DDD3;
      --success: #2D5A4B;
      --alert: #7A2E3B;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(62, 44, 35, 0.06);
      --shadow-hover: 0 12px 32px rgba(62, 44, 35, 0.12);
      --transition: 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }

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

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

    .container-custom {
      width: 100%;
      padding-right: 5%;
      padding-left: 5%;
      margin-right: auto;
      margin-left: auto;
    }

    @media (min-width: 1200px) {
      .container-custom {
        max-width: 1320px;
        padding-right: 3%;
        padding-left: 3%;
      }
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
      background-color: transparent;
      padding: 16px 0;
    }

    .navbar.scrolled {
      background-color: var(--bg-warm);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    .navbar .container-custom {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo-brand {
      font-size: 22px;
      font-weight: 700;
      color: white;
      letter-spacing: -0.02em;
      white-space: nowrap;
    }
    .navbar.scrolled .logo-brand {
      color: var(--primary);
    }
    .logo-brand span {
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }

    .nav-link-item {
      font-size: 15px;
      font-weight: 500;
      color: rgba(255,255,255,0.85);
      transition: color 0.2s;
      letter-spacing: 0.02em;
    }
    .navbar.scrolled .nav-link-item {
      color: var(--text-primary);
    }
    .nav-link-item:hover {
      color: var(--accent);
    }

    .btn-outline-gold {
      border: 1.5px solid var(--accent);
      background: transparent;
      color: var(--accent);
      padding: 8px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: 0.25s;
      white-space: nowrap;
    }
    .btn-outline-gold:hover {
      background: rgba(200,169,110,0.1);
      color: var(--accent);
    }
    .navbar.scrolled .btn-outline-gold {
      color: var(--accent);
      border-color: var(--accent);
    }

    .hamburger {
      display: none;
      font-size: 24px;
      color: white;
      cursor: pointer;
      background: none;
      border: none;
    }
    .navbar.scrolled .hamburger {
      color: var(--primary);
    }

    @media (max-width: 992px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--dark-bg);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        z-index: 1050;
        transform: translateX(100%);
        transition: transform 0.3s ease;
      }
      .mobile-menu.active {
        transform: translateX(0);
      }
      .mobile-menu a {
        color: white;
        font-size: 20px;
        font-weight: 500;
      }
      .mobile-menu .btn-outline-gold {
        margin-top: 1rem;
      }
    }

    /* Hero */
    .hero-section {
      height: 100vh;
      min-height: 700px;
      background: linear-gradient(135deg, rgba(30,26,23,0.8) 0%, rgba(62,44,35,0.75) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: white;
    }

    .hero-content h1 {
      font-size: 3.5rem;
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }
    .hero-content .lead {
      font-size: 1.2rem;
      color: var(--accent);
      font-weight: 400;
      margin-bottom: 2rem;
    }

    .btn-primary-brand {
      background: var(--primary);
      border: none;
      color: white;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.25s;
      font-size: 1rem;
    }
    .btn-primary-brand:hover {
      background: var(--primary-hover);
      color: white;
    }

    .hero-image-preview {
      border-radius: 16px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2.8rem;
      }
      .hero-image-preview {
        margin-top: 2rem;
        display: none;
      }
    }

    /* 区块通用 */
    section {
      padding: 120px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 80px 0;
      }
    }
    .section-title {
      font-size: 2.4rem;
      margin-bottom: 0.5rem;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 3rem;
    }

    /* 指标看板 */
    .stats-section {
      background: var(--dark-bg);
    }
    .stat-card {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(200,169,110,0.25);
      border-radius: 10px;
      padding: 2rem 1.5rem;
      text-align: center;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
    }
    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 0.9rem;
      margin-top: 0.5rem;
    }

    /* 服务非对称 */
    .service-large-card {
      background: white;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
    }
    .service-large-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-small-card {
      background: white;
      border-left: 4px solid var(--accent);
      border-radius: var(--radius-card);
      padding: 1.8rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
    }
    .service-small-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    /* 对比表 */
    .comparison-table {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .comp-row {
      display: flex;
      border-bottom: 1px solid var(--border-soft);
    }
    .comp-left, .comp-right {
      flex: 1;
      padding: 1.2rem 1.5rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
    .comp-left {
      background: #f9f7f5;
      color: var(--text-muted);
    }
    .comp-right {
      background: #fefcf8;
    }
    .icon-fail {
      color: var(--alert);
    }
    .icon-check {
      color: var(--success);
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      font-size: 1.1rem;
      background: white;
      color: var(--text-primary);
      box-shadow: none;
      border-bottom: 1px solid var(--border-soft);
      padding: 1.2rem 0;
    }
    .accordion-button:not(.collapsed) {
      background: var(--bg-warm);
      color: var(--primary);
      border-left: 3px solid var(--accent);
      padding-left: 1rem;
    }

    /* CTA */
    .cta-section {
      background: var(--dark-bg);
    }
    .form-control-custom {
      background: transparent;
      border: 1px solid rgba(200,169,110,0.5);
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 16px;
    }
    .form-control-custom::placeholder {
      color: #aaa;
    }

    footer {
      background: var(--dark-bg);
      color: var(--text-muted);
      padding: 3rem 0;
    }
    footer a:hover {
      color: var(--accent);
    }