/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --gold-light: #C5A86B;
      --gold-metal: #D4AF37;
      --text-white: #FFFFFF;
      --text-gray: #B0B8D1;
      --card-bg: rgba(255,255,255,0.05);
      --border-gold: rgba(197,168,107,0.2);
      --glass-blur: blur(12px);
      --radius-card: 16px;
      --radius-btn: 30px;
      --shadow-gold: 0 8px 32px rgba(197,168,107,0.15);
      --transition: all 0.3s ease;
      --nav-width: 240px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--primary-deep);
      color: var(--text-gray);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      display: flex;
      min-height: 100vh;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      border: none;
      outline: none;
      font-family: inherit;
    }
    h1, h2, h3, h4 {
      color: var(--text-white);
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    h1 {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: 1px;
      line-height: 1.2;
    }
    h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 1.5rem;
    }
    .container-main {
      flex: 1;
      margin-left: var(--nav-width);
      width: calc(100% - var(--nav-width));
    }
    /* 左侧竖向导航 */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      width: var(--nav-width);
      height: 100vh;
      background: rgba(8, 12, 32, 0.9);
      backdrop-filter: blur(16px);
      border-right: 1px solid rgba(197,168,107,0.2);
      display: flex;
      flex-direction: column;
      padding: 2rem 1.5rem;
      z-index: 100;
      transition: transform 0.3s ease;
    }
    .logo-area {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--gold-light);
      letter-spacing: 2px;
      margin-bottom: 3rem;
      text-align: center;
      line-height: 1.3;
    }
    .logo-area small {
      display: block;
      font-size: 0.8rem;
      color: var(--text-gray);
      font-weight: 400;
      letter-spacing: 1px;
    }
    .nav-links {
      list-style: none;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }
    .nav-links li a {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-gray);
      font-size: 1rem;
      padding: 0.6rem 1rem;
      border-radius: 8px;
      position: relative;
      transition: var(--transition);
    }
    .nav-links li a i {
      width: 20px;
      font-size: 1rem;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--gold-light);
      background: rgba(197,168,107,0.08);
    }
    .nav-links li a.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 10%;
      height: 80%;
      width: 3px;
      background: var(--gold-light);
      border-radius: 2px;
    }
    .mobile-header {
      display: none;
    }
    /* 主内容区 */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 3.5rem;
    }
    .section-title h2 {
      color: var(--text-white);
      position: relative;
      display: inline-block;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 2px;
      background: var(--gold-light);
    }
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius-card);
      padding: 2rem;
      transition: var(--transition);
      height: 100%;
    }
    .glass-card:hover {
      border-color: var(--gold-light);
      transform: translateY(-6px);
      box-shadow: var(--shadow-gold);
    }
    .btn-primary {
      background: linear-gradient(135deg, #C5A86B 0%, #D4AF37 100%);
      color: #0A0E27;
      font-weight: 700;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 20px rgba(212,175,55,0.4);
      letter-spacing: 1px;
      display: inline-block;
      text-align: center;
      transition: var(--transition);
      border: none;
    }
    .btn-primary:hover {
      box-shadow: 0 6px 28px rgba(212,175,55,0.7);
      transform: scale(1.02);
      color: #0A0E27;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--gold-light);
      color: var(--gold-light);
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 1px;
      display: inline-block;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(197,168,107,0.15);
      color: #FFFFFF;
    }
    /* Hero */
    .hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      min-height: 90vh;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(10,14,39,0.75);
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      width: 100%;
    }
    .hero-image {
      border-radius: 24px;
      box-shadow: 0 0 30px rgba(197,168,107,0.4);
      border: 1px solid rgba(197,168,107,0.3);
      overflow: hidden;
    }
    /* 统计卡片 */
    .stat-number {
      color: var(--gold-metal);
      font-size: 2.5rem;
      font-weight: 700;
    }
    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid rgba(197,168,107,0.15);
    }
    .accordion-title {
      background: transparent;
      color: var(--text-white);
      font-size: 1.1rem;
      padding: 1.2rem 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 500;
      transition: var(--transition);
    }
    .accordion-title i {
      color: var(--gold-light);
      transition: transform 0.3s;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: rgba(255,255,255,0.02);
      padding: 0 1rem;
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
      padding: 1rem;
    }
    .accordion-item.active .accordion-title i {
      transform: rotate(45deg);
    }
    footer {
      background: #060918;
      padding: 3rem 0 2rem;
      border-top: 1px solid rgba(197,168,107,0.2);
    }
    @media screen and (max-width: 1024px) {
      :root {
        --nav-width: 200px;
      }
      h1 { font-size: 2.4rem; }
      h2 { font-size: 2rem; }
    }
    @media screen and (max-width: 768px) {
      body {
        flex-direction: column;
      }
      .side-nav {
        display: none;
      }
      .container-main {
        margin-left: 0;
        width: 100%;
      }
      .mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 1.5rem;
        background: rgba(8,12,32,0.95);
        backdrop-filter: blur(12px);
        position: sticky;
        top: 0;
        z-index: 99;
        border-bottom: 1px solid rgba(197,168,107,0.2);
      }
      .mobile-logo {
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--gold-light);
      }
      .hamburger {
        color: var(--gold-light);
        font-size: 1.8rem;
        background: none;
        border: none;
      }
      .mobile-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(8,12,32,0.98);
        backdrop-filter: blur(20px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        z-index: 200;
        transform: translateX(100%);
        transition: transform 0.3s ease;
      }
      .mobile-menu.open {
        transform: translateX(0);
      }
      .mobile-menu a {
        color: var(--text-white);
        font-size: 1.5rem;
        font-weight: 500;
      }
      .close-menu {
        position: absolute;
        top: 2rem;
        right: 2rem;
        font-size: 2rem;
        color: var(--gold-light);
        background: none;
        border: none;
      }
      h1 { font-size: 2rem; }
      h2 { font-size: 1.8rem; }
      section { padding: 70px 0; }
    }
    @media screen and (max-width: 520px) {
      .hero { min-height: 80vh; }
      .btn-primary, .btn-outline { padding: 0.7rem 1.8rem; font-size: 0.9rem; }
    }