/* roulang page: index */
:root {
      --primary-orange: #F04E30;
      --primary-orange-hover: #D13B24;
      --deep-purple: #1E1345;
      --gold: #F7B731;
      --gold-light: rgba(247, 183, 49, 0.15);
      --bg-white: #F8F9FA;
      --card-white: #FFFFFF;
      --text-gray: #4A5568;
      --border-light: #E2E8F0;
      --success-green: #38A169;
      --alert-red: #E53E3E;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-num: "DIN Alternate", "Roboto", sans-serif;
      --shadow-card: 0 20px 40px -12px rgba(30, 19, 69, 0.15);
      --shadow-button: 0 8px 18px rgba(240, 78, 48, 0.3);
      --radius-lg: 16px;
      --radius-md: 8px;
      --max-width: 1280px;
      --space-section: 100px;
      --space-card: 24px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-cn);
      background-color: var(--bg-white);
      color: var(--text-gray);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      background: transparent;
      transition: background 0.3s, box-shadow 0.3s;
      padding: 16px 0;
    }
    #nav.scrolled {
      background: rgba(30, 19, 69, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 6px 20px rgba(0,0,0,0.25);
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    .nav-logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .nav-logo i {
      color: var(--primary-orange);
      font-size: 2rem;
      text-shadow: 0 0 12px rgba(240,78,48,0.6);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--gold);
    }
    .nav-cta {
      background: var(--primary-orange);
      color: #fff !important;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: var(--shadow-button);
      transition: background 0.25s, transform 0.2s;
    }
    .nav-cta:hover {
      background: var(--primary-orange-hover);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: #fff;
      cursor: pointer;
    }
    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--deep-purple);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 40px;
      z-index: 1000;
      font-size: 1.6rem;
    }
    .mobile-menu a {
      color: #fff;
      font-weight: 600;
    }
    .mobile-menu .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 2rem;
      color: #fff;
    }
    /* Hero */
    #hero {
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(30,19,69,0.88) 0%, rgba(240,78,48,0.75) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: #fff;
      position: relative;
    }
    .hero-content {
      max-width: 860px;
      padding: 0 20px;
    }
    .hero-content h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 24px;
    }
    .hero-content p {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 40px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      color: #fff;
      padding: 14px 40px;
      border-radius: 40px;
      font-weight: 700;
      font-size: 1.1rem;
      border: none;
      cursor: pointer;
      box-shadow: 0 12px 24px rgba(240,78,48,0.35);
      transition: 0.25s;
    }
    .btn-primary:hover {
      background: var(--primary-orange-hover);
      transform: translateY(-3px);
      box-shadow: 0 20px 30px rgba(240,78,48,0.45);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid rgba(255,255,255,0.7);
      color: #fff;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: #fff;
    }
    /* 通用区块 */
    section {
      padding: var(--space-section) 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--deep-purple);
      margin-bottom: 12px;
    }
    .section-title p {
      font-size: 1.2rem;
      color: #5a6170;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-card);
    }
    .card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.25s;
      position: relative;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: 0 28px 48px -14px rgba(30,19,69,0.2);
    }
    .badge-gold {
      background: var(--gold);
      color: #1E1345;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: 16px;
      right: 16px;
      font-family: var(--font-num);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(240,78,48,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-orange);
      font-size: 2rem;
    }
    /* 数据墙 */
    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
    }
    .stat-item {
      font-family: var(--font-num);
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary-orange), var(--gold));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* FAQ */
    .faq-item {
      background: #fff;
      border-bottom: 1px solid var(--border-light);
      border-radius: 0;
      cursor: pointer;
    }
    .faq-question {
      padding: 20px 16px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      color: var(--deep-purple);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #F4F1FA;
      padding: 0 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 20px;
    }
    /* CTA */
    #final-cta {
      background: var(--deep-purple);
      color: #fff;
      text-align: center;
    }
    /* Footer */
    footer {
      background: var(--deep-purple);
      color: rgba(255,255,255,0.7);
      padding: 40px 0;
      text-align: center;
    }
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .hero-content h1 { font-size: 2.6rem; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .grid-3 { grid-template-columns: 1fr; }
      .hero-content h1 { font-size: 2.2rem; }
      .stats-grid { gap: 30px; }
    }