/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --deep-space: #0A0515;
      --nebula-purple: #7B2FF7;
      --deep-indigo: #1E0A3C;
      --starlight-gold: #F5B042;
      --stardust-silver: #C0CCDA;
      --glass-bg: rgba(255,255,255,0.03);
      --glass-border: rgba(255,255,255,0.08);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.05) inset;
      --card-hover-shadow: 0 16px 48px rgba(0,0,0,0.6), 0 0 0 1px rgba(245,176,66,0.15) inset;
      --transition-smooth: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Inter', sans-serif;
      --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
      --text-glow-gold: 0 0 12px rgba(245,176,66,0.6);
      --nav-width: 240px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--deep-space);
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-space);
      color: var(--stardust-silver);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      display: flex;
      min-height: 100vh;
      flex-direction: column;
    }
    /* 左侧竖向导航 */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      width: var(--nav-width);
      height: 100vh;
      background-color: #0A0515;
      border-right: 1px solid transparent;
      background-image: linear-gradient(to bottom, rgba(245,176,66,0.1), transparent 20%, transparent 80%, rgba(245,176,66,0.05));
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2.5rem 1rem;
      z-index: 50;
      box-shadow: 0 0 40px rgba(0,0,0,0.8);
      backdrop-filter: blur(8px);
      transition: transform 0.3s ease;
    }
    .nav-logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: white;
      letter-spacing: -0.02em;
      margin-bottom: 3rem;
      text-align: center;
      line-height: 1.2;
      background: linear-gradient(135deg, #fff 0%, #C0CCDA 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-logo small {
      display: block;
      font-size: 0.7rem;
      font-weight: 400;
      color: var(--starlight-gold);
      -webkit-text-fill-color: var(--starlight-gold);
      letter-spacing: 0.1em;
    }
    .nav-menu {
      display: flex;
      flex-direction: column;
      width: 100%;
      gap: 0.5rem;
      flex: 1;
    }
    .nav-link {
      color: var(--stardust-silver);
      text-decoration: none;
      padding: 0.8rem 1.2rem;
      border-radius: 8px;
      font-weight: 500;
      font-size: 0.95rem;
      transition: all 0.2s ease;
      display: flex;
      align-items: center;
      gap: 0.6rem;
      position: relative;
    }
    .nav-link i {
      font-size: 1.1rem;
      width: 20px;
      color: #7B8A9B;
    }
    .nav-link:hover {
      background: rgba(255,255,255,0.04);
      color: white;
    }
    .nav-link.active {
      color: var(--starlight-gold);
      background: rgba(245,176,66,0.08);
      border-left: 4px solid var(--starlight-gold);
      padding-left: calc(1.2rem - 4px);
      font-weight: 600;
    }
    .nav-footer {
      margin-top: auto;
      text-align: center;
    }
    .nav-footer p {
      font-size: 0.7rem;
      color: #6A7B8F;
      margin-bottom: 0.8rem;
    }
    .social-icons i {
      font-size: 1.2rem;
      margin: 0 0.4rem;
      color: #6A7B8F;
      transition: color 0.2s;
    }
    .social-icons i:hover {
      color: var(--starlight-gold);
    }

    /* 主内容区域 */
    .main-content {
      margin-left: var(--nav-width);
      width: calc(100% - var(--nav-width));
      flex: 1;
    }
    /* 移动端导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10,5,21,0.92);
      backdrop-filter: blur(12px);
      z-index: 55;
      padding: 1rem 1.5rem;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .hamburger {
      font-size: 1.8rem;
      color: white;
      background: none;
      border: none;
    }
    .mobile-menu-drawer {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: #0A0515;
      z-index: 60;
      display: flex;
      flex-direction: column;
      padding: 2rem;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
    }
    .mobile-menu-drawer.open {
      transform: translateX(0);
    }
    .mobile-menu-drawer .nav-link {
      font-size: 1.2rem;
      padding: 1rem;
    }

    /* 通用板块 */
    .section-padding {
      padding: 5rem 3rem;
    }
    @media (max-width: 1024px) {
      .section-padding {
        padding: 4rem 1.8rem;
      }
    }
    .glass-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.08);
      box-shadow: var(--card-shadow);
      border-radius: 20px;
      transition: var(--transition-smooth);
    }
    .glass-card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
      background: rgba(255,255,255,0.06);
    }
    .btn-primary {
      background: linear-gradient(135deg, #F5B042 0%, #E0952C 100%);
      color: #0A0515;
      font-weight: 600;
      padding: 0.9rem 2.2rem;
      border-radius: 30px;
      box-shadow: 0 0 20px rgba(245,176,66,0.4);
      transition: all 0.25s ease;
      border: none;
      display: inline-block;
      text-align: center;
      letter-spacing: 0.02em;
    }
    .btn-primary:hover {
      box-shadow: 0 0 35px rgba(245,176,66,0.7);
      transform: scale(1.05);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--stardust-silver);
      color: var(--stardust-silver);
      font-weight: 500;
      padding: 0.9rem 2.2rem;
      border-radius: 30px;
      transition: all 0.25s;
    }
    .btn-outline:hover {
      border-color: var(--starlight-gold);
      color: var(--starlight-gold);
    }
    h1 {
      font-size: 3.5rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: white;
    }
    h2 {
      font-size: 2.5rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      margin-bottom: 2rem;
    }
    @media (max-width: 768px) {
      h1 { font-size: 2.4rem; }
      h2 { font-size: 1.9rem; }
    }
    .text-glow {
      text-shadow: 0 0 15px rgba(245,176,66,0.5);
    }
    .mono-number {
      font-family: var(--font-mono);
      font-weight: 600;
    }
    /* 粒子星光效果 */
    .star-particles {
      position: absolute;
      width: 100%;
      height: 100%;
      pointer-events: none;
      background: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.03) 1px, transparent 1px),
                  radial-gradient(circle at 70% 60%, rgba(245,176,66,0.04) 2px, transparent 2px);
      background-size: 100px 100px, 180px 180px;
    }
    input, textarea {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 12px;
      padding: 0.9rem 1.2rem;
      color: white;
      transition: 0.2s;
      width: 100%;
      font-family: var(--font-sans);
    }
    input:focus, textarea:focus {
      outline: none;
      border-color: var(--starlight-gold);
      box-shadow: 0 0 15px rgba(245,176,66,0.3);
    }
    @keyframes pulse-glow {
      0% { box-shadow: 0 0 15px rgba(245,176,66,0.4); }
      50% { box-shadow: 0 0 30px rgba(245,176,66,0.8); }
      100% { box-shadow: 0 0 15px rgba(245,176,66,0.4); }
    }
    .pulse-animation {
      animation: pulse-glow 2s infinite;
    }
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .faq-question {
      cursor: pointer;
      padding: 1.4rem 0;
      display: flex;
      align-items: center;
      font-weight: 500;
      position: relative;
      padding-left: 1.2rem;
    }
    .faq-question::before {
      content: '';
      position: absolute;
      left: 0;
      top: 25%;
      height: 50%;
      width: 4px;
      background: var(--starlight-gold);
      border-radius: 4px;
      transition: 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      padding-left: 1.2rem;
      color: #AAB4C2;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 1.5rem;
    }
    .faq-item.open .faq-question::before {
      background: var(--nebula-purple);
      height: 70%;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .side-nav {
        display: none;
      }
      .mobile-nav {
        display: flex;
      }
      .main-content {
        margin-left: 0;
        width: 100%;
        padding-top: 70px;
      }
    }