/* roulang page: index */
:root {
      --deep-purple-black: #1a0a2e;
      --darker-bg: #0d0d1a;
      --gold: #d4af37;
      --gold-light: #f0e6c8;
      --electric-purple: #b44dff;
      --light-bg: #f5f0fa;
      --white: #ffffff;
      --card-shadow: 0 4px 20px rgba(26, 10, 46, 0.08);
      --glass-bg: rgba(26, 10, 46, 0.4);
      --glass-border: rgba(212, 175, 55, 0.3);
      --radius-card-lg: 16px;
      --radius-card-sm: 12px;
      --radius-btn-capsule: 50px;
      --radius-search: 50px;
      --transition-default: 0.3s ease;
      --font-inter: 'Inter', 'Noto Sans SC', sans-serif;
      --font-sans: 'Noto Sans SC', 'Inter', sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--deep-purple-black);
      line-height: 1.7;
      scroll-behavior: smooth;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-default);
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 - 搜索主导 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(13, 13, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.2);
      padding: 12px 0;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 0.5px;
      font-family: var(--font-inter);
    }
    .logo-text span {
      color: var(--white);
      font-weight: 400;
      margin-left: 4px;
      font-size: 1.2rem;
    }
    .nav-search-wrapper {
      display: flex;
      align-items: center;
      flex: 1;
      justify-content: center;
      margin: 0 24px;
    }
    .search-box {
      background: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-search);
      display: flex;
      align-items: center;
      padding: 0 20px;
      width: 100%;
      max-width: 400px;
      transition: var(--transition-default);
    }
    .search-box i {
      color: var(--gold);
      font-size: 1rem;
      margin-right: 10px;
    }
    .search-box input {
      background: transparent;
      border: none;
      padding: 14px 0;
      width: 100%;
      color: var(--white);
      font-size: 0.95rem;
      outline: none;
    }
    .search-box input::placeholder {
      color: var(--gold-light);
      opacity: 0.7;
      font-weight: 400;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: var(--white);
      font-weight: 500;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--gold);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--gold);
      font-size: 1.8rem;
      cursor: pointer;
    }
    /* Hero */
    .hero-section {
      height: 100vh;
      min-height: 650px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(26,10,46,0.8) 0%, rgba(13,13,26,0.7) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 800px;
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: 24px;
      padding: 48px 40px;
      color: var(--white);
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 700;
      background: linear-gradient(180deg, #d4af37 0%, #f0e6c8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.2rem;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--gold-light);
      margin-bottom: 2rem;
    }
    .btn-glow {
      background: var(--gold);
      color: var(--deep-purple-black);
      font-weight: 600;
      padding: 14px 42px;
      border-radius: var(--radius-btn-capsule);
      font-size: 1rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      box-shadow: 0 0 20px rgba(180,77,255,0.6);
      transition: 0.3s;
      display: inline-block;
      border: none;
      cursor: pointer;
    }
    .btn-glow:hover {
      background: var(--electric-purple);
      color: white;
      box-shadow: 0 0 32px rgba(180,77,255,0.9);
      transform: translateY(-2px);
    }
    .hero-aux-link {
      display: inline-block;
      margin-top: 24px;
      color: var(--gold);
      font-weight: 500;
      border-bottom: 1px solid transparent;
      transition: 0.2s;
    }
    .hero-aux-link i {
      margin-left: 6px;
    }
    .hero-aux-link:hover {
      border-color: var(--electric-purple);
      color: var(--electric-purple);
    }
    /* 板块通用 */
    .section {
      padding: 100px 0;
    }
    .section-light {
      background-color: var(--light-bg);
    }
    .section-dark {
      background: linear-gradient(135deg, #1a0a2e 0%, #0d0d1a 100%);
      color: var(--white);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 48px;
      height: 3px;
      background: var(--gold);
      margin-top: 8px;
      border-radius: 4px;
    }
    .text-gold {
      color: var(--gold);
    }
    /* 功能卡片 非对称 */
    .features-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      margin-top: 48px;
    }
    .feature-card {
      background: white;
      border-radius: var(--radius-card-lg);
      padding: 32px;
      box-shadow: var(--card-shadow);
      border-left: 5px solid var(--gold);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(26,10,46,0.12);
    }
    .feature-card.large {
      grid-row: span 2;
    }
    .feature-img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 20px;
      border-top: 4px solid var(--gold);
    }
    .feature-title {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    /* 场景卡片 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      margin-top: 48px;
    }
    .scenario-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(212,175,55,0.25);
      border-radius: var(--radius-card-lg);
      padding: 28px;
      transition: 0.3s;
    }
    .scenario-card:hover {
      border-color: var(--gold);
      box-shadow: 0 0 18px rgba(212,175,55,0.3);
    }
    .scenario-img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 20px;
    }
    /* 案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 48px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card-lg);
      padding: 28px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      text-align: left;
      border-bottom: 4px solid transparent;
      transition: 0.3s;
    }
    .case-card:hover {
      border-bottom-color: var(--gold);
      box-shadow: 0 12px 24px rgba(0,0,0,0.1);
    }
    .case-big-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: rgba(212,175,55,0.7);
      align-self: flex-end;
      margin-top: -10px;
    }
    /* FAQ */
    .faq-list {
      margin-top: 40px;
    }
    .faq-item {
      border-bottom: 1px solid rgba(26,10,46,0.1);
      padding: 18px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      color: var(--deep-purple-black);
      padding-left: 12px;
      border-left: 4px solid var(--gold);
      transition: 0.2s;
    }
    .faq-question i {
      color: var(--gold);
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #f9f7fc;
      margin-top: 12px;
      border-radius: 8px;
      padding: 0 18px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 18px;
    }
    .faq-item.active .faq-question {
      border-left-color: var(--electric-purple);
      color: var(--gold);
    }
    .faq-item.active .faq-question i {
      transform: rotate(180deg);
    }
    /* CTA 尾屏 */
    .cta-dark {
      background: linear-gradient(135deg, #1a0a2e, #0d0d1a);
      text-align: center;
      padding: 90px 20px;
    }
    .cta-glass {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: 28px;
      padding: 48px;
      max-width: 700px;
      margin: 0 auto;
    }
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-top: 40px;
    }
    .footer-brand p {
      color: var(--gold-light);
      margin-top: 12px;
    }
    .footer-links h4 {
      color: var(--gold);
      margin-bottom: 16px;
    }
    .footer-links a {
      display: block;
      color: #ddd;
      margin-bottom: 8px;
    }
    .footer-links a:hover {
      color: var(--gold);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      margin-top: 40px;
      padding-top: 24px;
      text-align: center;
      color: #aaa;
    }
    @media (max-width: 1024px) {
      .cases-grid { grid-template-columns: repeat(2,1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .header-inner { flex-direction: column; align-items: stretch; }
      .nav-search-wrapper { margin: 12px 0; order: 1; }
      .nav-links { display: none; flex-direction: column; width: 100%; background: #1a0a2e; padding: 16px; border-radius: 12px; }
      .nav-links.active { display: flex; }
      .hamburger { display: block; position: absolute; right: 24px; top: 22px; }
      .hero-title { font-size: 2rem; }
      .features-grid { grid-template-columns: 1fr; }
      .scenarios-grid { grid-template-columns: 1fr; }
      .cases-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .section { padding: 70px 0; }
    }