/* roulang page: index */
:root {
      --deep-ink: #0B0C10;
      --champagne: #C9A96E;
      --champagne-light: #D4B87A;
      --matte-white: #F5F5F7;
      --charcoal: #1A1C23;
      --deep-green: #2E5A4B;
      --dark-red: #8B3A3A;
      --border-subtle: #2C2F38;
      --text-dim: rgba(245, 245, 247, 0.75);
      --text-muted: rgba(245, 245, 247, 0.6);
      --radius-card: 12px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --shadow-glow: 0 0 0 1px rgba(201,169,110,0.45), 0 10px 25px rgba(0,0,0,0.7);
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--deep-ink);
      color: var(--matte-white);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .english-font, .data-number, .step-number {
      font-family: 'Inter', 'SF Pro Display', sans-serif;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 悬浮胶囊导航 */
    .capsule-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 1100px;
      background: rgba(26, 28, 35, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-radius: 40px;
      padding: 10px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 999;
      box-shadow: 0 4px 18px rgba(0,0,0,0.5);
      transition: background 0.3s, box-shadow 0.3s;
    }
    .capsule-nav.scrolled {
      background: rgba(26, 28, 35, 0.98);
      box-shadow: 0 8px 24px rgba(0,0,0,0.8);
    }
    .nav-logo {
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--champagne);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav-links a {
      color: var(--matte-white);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
      transition: color 0.25s;
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 2px;
      background: var(--champagne);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--champagne);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--champagne);
      font-size: 1.6rem;
      cursor: pointer;
    }
    /* 板块通用 */
    section {
      padding: 130px 0;
      position: relative;
    }
    .section-title {
      font-size: 44px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      color: var(--matte-white);
      margin-bottom: 24px;
      display: inline-block;
      position: relative;
    }
    .section-title::after {
      content: "";
      display: block;
      width: 50px;
      height: 3px;
      background: var(--champagne);
      margin-top: 12px;
      transition: width 0.4s ease;
    }
    .section-title:hover::after {
      width: 90px;
    }
    .text-dim {
      color: var(--text-dim);
    }
    /* 按钮 */
    .btn-primary {
      background: var(--champagne);
      color: var(--deep-ink);
      font-weight: 700;
      border-radius: 30px;
      padding: 14px 38px;
      border: none;
      display: inline-block;
      transition: background 0.25s, box-shadow 0.25s, transform 0.2s;
      cursor: pointer;
      font-size: 1rem;
      letter-spacing: 0.3px;
      box-shadow: 0 5px 16px rgba(0,0,0,0.4);
    }
    .btn-primary:hover {
      background: var(--champagne-light);
      box-shadow: 0 8px 28px rgba(201,169,110,0.5);
      transform: translateY(-2px);
      color: var(--deep-ink);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--champagne);
      color: var(--champagne);
      font-weight: 600;
      border-radius: 30px;
      padding: 13px 36px;
      transition: all 0.25s;
    }
    .btn-outline:hover {
      background: rgba(201,169,110,0.1);
      border-color: var(--champagne-light);
      color: var(--champagne-light);
      transform: translateY(-2px);
    }
    /* 卡片 */
    .card-elevated {
      background: var(--charcoal);
      border-radius: 12px;
      padding: 36px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
    }
    .card-elevated:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-glow);
    }
    /* Hero */
    .hero-section {
      min-height: 95vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1e2028 0%, var(--deep-ink) 80%);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-art {
      position: absolute;
      right: -10%;
      top: 10%;
      font-size: 22rem;
      font-weight: 800;
      color: rgba(201,169,110,0.04);
      font-family: 'Inter', sans-serif;
      user-select: none;
    }
    /* 数据数字动画 */
    .count-number {
      font-size: 52px;
      font-weight: 800;
      color: var(--champagne);
      font-family: 'Inter', sans-serif;
      line-height: 1.1;
    }
    /* 流程时间线 */
    .timeline-step {
      display: flex;
      gap: 30px;
      margin-bottom: 42px;
      position: relative;
    }
    .timeline-step:not(:last-child)::before {
      content: "";
      position: absolute;
      left: 24px;
      top: 50px;
      width: 2px;
      height: calc(100% + 20px);
      background: rgba(201,169,110,0.25);
    }
    .step-marker {
      font-size: 42px;
      font-weight: 700;
      color: var(--champagne);
      width: 50px;
      text-align: center;
    }
    /* FAQ */
    .accordion-item {
      background: var(--charcoal);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-title {
      padding: 22px 28px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--matte-white);
    }
    .accordion-content {
      padding: 0 28px 22px;
      color: var(--text-dim);
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    .accordion-item.active .accordion-title i {
      transform: rotate(45deg);
    }
    /* 表单 */
    .input-field {
      background: var(--deep-ink);
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      padding: 14px 20px;
      color: white;
      width: 100%;
      transition: border 0.2s, box-shadow 0.2s;
    }
    .input-field:focus {
      border-color: var(--champagne);
      box-shadow: 0 0 0 3px rgba(201,169,110,0.25);
      outline: none;
    }
    /* 页脚 */
    .footer-bottom {
      border-top: 1px solid rgba(201,169,110,0.15);
      padding: 40px 0;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      align-items: center;
    }
    @media (max-width: 1024px) {
      .capsule-nav {
        width: 95%;
        padding: 10px 18px;
      }
      .nav-links {
        gap: 16px;
      }
      section {
        padding: 100px 0;
      }
    }
    @media (max-width: 768px) {
      .capsule-nav {
        top: auto;
        bottom: 0;
        left: 0;
        transform: none;
        border-radius: 0;
        width: 100%;
        background: rgba(10,11,16,0.97);
        border-top: 1px solid var(--champagne);
        padding: 10px 20px;
      }
      .nav-links {
        display: none;
        position: absolute;
        bottom: 70px;
        left: 0;
        width: 100%;
        background: var(--charcoal);
        flex-direction: column;
        padding: 18px;
        border-radius: 16px 16px 0 0;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-section {
        min-height: 90vh;
        text-align: center;
        padding-top: 80px;
      }
    }