/* roulang page: index */
:root {
      --primary-orange: #F15A24;
      --primary-orange-hover: #d14a1a;
      --deep-charcoal: #2D2D2D;
      --warm-white: #FDFBF7;
      --light-sand: #F4EFE6;
      --forest-green: #1A3B32;
      --text-muted: #6b6b6b;
      --border-light: #e8e3da;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 12px 30px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.25s ease;
      --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-inter: "Inter", sans-serif;
      --header-height: 76px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: var(--deep-charcoal);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    h1, h2, h3, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.01em;
    }
    h2 {
      font-size: 2.4rem;
      line-height: 1.3;
      margin-bottom: 0.5rem;
      color: var(--deep-charcoal);
    }
    .section-title-group {
      text-align: center;
      margin-bottom: 3.5rem;
    }
    .section-title-group .en-deco {
      font-family: var(--font-inter);
      font-size: 0.9rem;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--primary-orange);
      display: block;
      margin-bottom: 0.5rem;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      background: none;
      transition: var(--transition);
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .header.scrolled {
      background: rgba(255,255,255,0.96);
      box-shadow: 0 2px 15px rgba(0,0,0,0.04);
    }
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-height);
    }
    .logo {
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--deep-charcoal);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -0.3px;
    }
    .logo i {
      color: var(--primary-orange);
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      gap: 2.5rem;
      align-items: center;
      font-weight: 500;
    }
    .nav-links a {
      position: relative;
      padding: 0.4rem 0;
      font-size: 1rem;
      color: var(--deep-charcoal);
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-orange);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--primary-orange);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--primary-orange);
      color: white !important;
      padding: 0.6rem 1.8rem !important;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: 0 6px 18px rgba(241,90,36,0.3);
    }
    .nav-cta:hover {
      background: var(--primary-orange-hover);
      color: white !important;
      transform: translateY(-1px);
    }
    .nav-cta::after {
      display: none;
    }
    .mobile-menu-toggle {
      display: none;
      font-size: 1.6rem;
      color: var(--deep-charcoal);
    }
    /* Hero */
    .hero {
      padding: calc(var(--header-height) + 60px) 0 100px;
      background: linear-gradient(135deg, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.2) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      min-height: 90vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 700px;
    }
    .hero h1 {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      text-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }
    .hero-sub {
      font-size: 1.3rem;
      color: #F4EFE6;
      margin-bottom: 2.5rem;
      line-height: 1.7;
      opacity: 0.95;
    }
    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      padding: 0.9rem 2.5rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1.05rem;
      box-shadow: 0 10px 25px rgba(241,90,36,0.5);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: var(--primary-orange-hover);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 0.9rem 2.5rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1.05rem;
    }
    .btn-outline:hover {
      background: white;
      color: var(--deep-charcoal);
    }
    .dynamic-card {
      position: absolute;
      right: 5%;
      bottom: 80px;
      background: rgba(26,59,50,0.85);
      backdrop-filter: blur(12px);
      padding: 1.2rem 2rem;
      border-radius: var(--radius-md);
      font-family: var(--font-inter);
      color: white;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
    }
    .dynamic-card .number {
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--primary-orange);
    }
    /* 通用板块 */
    section {
      padding: 110px 0;
    }
    .bg-sand {
      background-color: var(--light-sand);
    }
    /* 优势卡片 混合布局 */
    .advantage-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: start;
    }
    .advantage-main {
      background: white;
      border-radius: var(--radius-lg);
      padding: 2.8rem 2.2rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .advantage-main:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .advantage-main i {
      font-size: 2.8rem;
      color: var(--primary-orange);
      margin-bottom: 1.5rem;
    }
    .advantage-sub-grid {
      display: grid;
      grid-template-rows: 1fr 1fr;
      gap: 28px;
    }
    .advantage-card {
      background: white;
      border-radius: var(--radius-md);
      padding: 1.8rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      gap: 1.2rem;
      align-items: flex-start;
    }
    .advantage-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }
    .advantage-card i {
      font-size: 2rem;
      color: var(--forest-green);
    }
    .card-text h3 {
      font-size: 1.35rem;
      margin-bottom: 0.4rem;
    }
    /* 服务区水平滚动卡片 */
    .service-scroll {
      display: flex;
      gap: 28px;
      overflow-x: auto;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .service-scroll::-webkit-scrollbar {
      height: 6px;
      background: #e0d7cc;
      border-radius: 10px;
    }
    .service-scroll::-webkit-scrollbar-thumb {
      background: var(--primary-orange);
      border-radius: 10px;
    }
    .service-card {
      flex: 0 0 340px;
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      transition: var(--transition);
    }
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-5px);
    }
    .service-card img {
      height: 200px;
      object-fit: cover;
    }
    .service-card-body {
      padding: 1.8rem;
    }
    /* 信任数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-item .stat-number {
      font-family: var(--font-inter);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary-orange);
    }
    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
    }
    .step {
      flex:1;
      text-align: center;
      padding: 0 20px;
    }
    .step-icon {
      background: var(--forest-green);
      color: white;
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      font-size: 2rem;
    }
    /* FAQ */
    .faq-item {
      background: var(--light-sand);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      padding: 1.4rem 2rem;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-item.active {
      background: white;
      border-left: 4px solid var(--primary-orange);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 1.15rem;
    }
    .faq-answer {
      margin-top: 1rem;
      display: none;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA */
    .cta-band {
      background: var(--forest-green);
      color: white;
      text-align: center;
      padding: 90px 0;
      border-radius: 0;
    }
    .footer {
      background: var(--forest-green);
      color: #cbd5d0;
      padding: 45px 0;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .social i {
      font-size: 1.6rem;
      margin-left: 20px;
      transition: color 0.2s;
    }
    .social i:hover {
      color: var(--primary-orange);
    }
    @media (max-width: 1024px) {
      .advantage-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2,1fr);
      }
      .dynamic-card {
        position: static;
        margin-top: 2rem;
        width: fit-content;
      }
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 24px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 25px;
        box-shadow: 0 15px 25px rgba(0,0,0,0.08);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero h1 {
        font-size: 2.5rem;
      }
      .steps {
        flex-direction: column;
        gap: 40px;
      }
      .service-scroll {
        gap: 20px;
      }
      .footer-grid {
        flex-direction: column;
        gap: 20px;
        text-align: center;
      }
    }