/* roulang page: index */
:root {
      --primary: #1A1A1E;
      --primary-deep: #0F172A;
      --accent: #FF5E1A;
      --accent-red: #E63946;
      --trust-green: #10B981;
      --gold: #C9A96E;
      --bg-light: #F7F5F2;
      --bg-white: #FFFFFF;
      --text-dark: #1A1A1E;
      --text-gray: #555555;
      --text-light: #E0E0E0;
      --border-light: rgba(0,0,0,0.06);
      --border-white: rgba(255,255,255,0.1);
      --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 40px;
      --font-title: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "DIN Alternate", "Bebas Neue", "Oswald", sans-serif;
      --transition: 0.2s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-title);
      background-color: var(--bg-white);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.02em;
    }

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

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

    /* 浮动Dock导航 */
    .navbar-dock {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: 90%;
      max-width: 720px;
      height: 64px;
      background: rgba(26, 26, 30, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border-white);
      border-radius: var(--radius-pill);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      z-index: 1000;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      transition: background 0.3s, box-shadow 0.3s;
    }

    .navbar-dock.scrolled {
      background: rgba(15, 23, 42, 0.95);
      box-shadow: 0 12px 28px rgba(0,0,0,0.25);
    }

    .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .logo-text i {
      color: var(--accent);
      font-size: 1.8rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--accent);
    }
    .nav-cta-btn {
      background: var(--accent);
      color: white;
      padding: 10px 20px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.2s;
      white-space: nowrap;
    }
    .nav-cta-btn:hover {
      background: #e04e10;
      transform: scale(1.03);
      color: white;
    }

    /* 移动端底部Dock */
    @media (max-width: 768px) {
      .navbar-dock {
        top: auto;
        bottom: 16px;
        width: 92%;
        height: 60px;
        padding: 0 20px;
        justify-content: space-between;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: flex;
        align-items: center;
        color: white;
        font-size: 1.8rem;
      }
    }
    @media (min-width: 769px) {
      .mobile-menu-toggle {
        display: none;
      }
    }

    /* Hero全屏 */
    .hero-section {
      height: 100vh;
      min-height: 700px;
      background: linear-gradient(135deg, rgba(15,23,42,0.8) 0%, rgba(26,26,30,0.9) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 750px;
      margin-top: 40px;
    }
    .hero h1 {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: white;
    }
    .hero .subtitle {
      font-size: 1.4rem;
      opacity: 0.9;
      margin-bottom: 2.5rem;
      font-weight: 400;
    }
    .btn-primary-custom {
      background: var(--accent);
      border: none;
      padding: 16px 36px;
      font-weight: 600;
      font-size: 1.1rem;
      border-radius: var(--radius-btn);
      color: white;
      transition: all 0.25s;
      box-shadow: 0 0 0 0 rgba(255,94,26,0.4);
    }
    .btn-primary-custom:hover {
      background: #e04e10;
      transform: scale(1.04);
      box-shadow: 0 0 20px rgba(255,94,26,0.6);
      color: white;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.5rem;
      }
      .hero .subtitle {
        font-size: 1.1rem;
      }
      .hero-section {
        background-attachment: scroll;
      }
    }

    /* 板块通用 */
    .section-padding {
      padding: 90px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
    }
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--text-dark);
    }
    .section-subtitle {
      color: var(--text-gray);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }

    /* 优势卡片 */
    .advantage-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent);
      transition: all 0.25s;
      height: 100%;
    }
    .advantage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .advantage-icon {
      font-size: 2.5rem;
      color: var(--accent);
      margin-bottom: 1.2rem;
    }

    /* 服务卡片 */
    .service-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      height: 200px;
      object-fit: cover;
    }
    .service-body {
      padding: 24px;
    }

    /* 数据指标 */
    .metric-number {
      font-family: var(--font-number);
      font-size: 3.4rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1;
    }
    .metric-label {
      color: var(--text-gray);
      font-size: 1rem;
      margin-top: 8px;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      position: relative;
    }
    .testimonial-quote {
      font-size: 3rem;
      color: var(--gold);
      opacity: 0.2;
      position: absolute;
      top: 10px;
      left: 20px;
    }
    .avatar-placeholder {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #ddd;
      margin-right: 12px;
    }

    /* FAQ手风琴定制 */
    .accordion-button {
      font-weight: 600;
      background: #F1F1F3;
      border-radius: 8px !important;
      padding: 16px 20px;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: #F1F1F3;
      color: var(--text-dark);
      border-left: 4px solid var(--accent);
    }
    .accordion-item {
      border: none;
      margin-bottom: 8px;
      border-radius: 8px;
      overflow: hidden;
    }

    /* CTA深色区 */
    .cta-dark {
      background: var(--primary-deep);
      padding: 80px 0;
      color: white;
    }

    /* 页脚 */
    .footer-dark {
      background: var(--primary);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-dark a {
      color: #aaa;
      transition: 0.2s;
    }
    .footer-dark a:hover {
      color: var(--accent);
      text-decoration: underline;
    }