/* roulang page: index */
:root {
      --deep-amethyst: #1E0F2B;
      --champagne-gold: #D4AF37;
      --dark-emerald: #0B3B36;
      --emerald-glass: rgba(11, 59, 54, 0.7);
      --gold-border: rgba(212, 175, 55, 0.3);
      --gold-glow: rgba(212, 175, 55, 0.6);
      --text-light: #F0EDE8;
      --text-muted: #BFB8A8;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
      --radius-card: 16px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --transition-base: all 0.3s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-amethyst);
      color: var(--text-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 5vw;
    }

    /* 悬浮胶囊导航 */
    .capsule-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 600px;
      background: rgba(30, 15, 43, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 40px;
      padding: 0.8rem 2rem;
      z-index: 1000;
      border: 1px solid var(--gold-border);
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 1.5rem;
      flex-wrap: wrap;
    }

    .capsule-nav a {
      color: var(--champagne-gold);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-base);
      white-space: nowrap;
      position: relative;
      padding: 0.3rem 0;
    }

    .capsule-nav a:hover {
      text-shadow: 0 0 12px var(--gold-glow);
      color: #fff;
    }

    .nav-logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.2rem;
      letter-spacing: 0.05em;
      margin-right: 1rem;
      color: #fff;
    }

    /* Hero 全屏 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      background: radial-gradient(circle at 30% 40%, rgba(212,175,55,0.12) 0%, rgba(30,15,43,0.95) 70%);
      padding: 0 5vw;
      text-align: center;
    }

    .hero-content {
      max-width: 900px;
      z-index: 2;
    }

    .brand-logo {
      font-family: var(--font-serif);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--champagne-gold);
      letter-spacing: 0.08em;
      margin-bottom: 0.5rem;
    }

    .domain-sub {
      font-size: 0.9rem;
      color: var(--text-muted);
      letter-spacing: 0.15em;
      margin-bottom: 2rem;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      line-height: 1.2;
      color: #fff;
      text-shadow: 0 0 30px rgba(212,175,55,0.3);
    }

    .hero-sub {
      font-size: 1.3rem;
      color: var(--text-muted);
      margin-bottom: 2.5rem;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .btn-group {
      display: flex;
      gap: 1.2rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #D4AF37 0%, #B8960C 100%);
      color: var(--deep-amethyst);
      font-weight: 600;
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-pill);
      border: none;
      cursor: pointer;
      transition: var(--transition-base);
      box-shadow: 0 4px 15px rgba(212,175,55,0.3);
      font-size: 1rem;
      letter-spacing: 0.03em;
    }

    .btn-primary:hover {
      box-shadow: 0 0 25px var(--gold-glow);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--champagne-gold);
      color: var(--champagne-gold);
      font-weight: 500;
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-pill);
      cursor: pointer;
      transition: var(--transition-base);
      font-size: 1rem;
    }

    .btn-outline:hover {
      background: rgba(212,175,55,0.15);
      color: #fff;
      border-color: #fff;
    }

    /* 通用版块 */
    section {
      padding: 7rem 0;
      position: relative;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 1rem;
      color: #fff;
    }

    .section-desc {
      color: var(--text-muted);
      margin-bottom: 3rem;
      max-width: 600px;
      font-size: 1.1rem;
    }

    /* 服务区：非对称布局 */
    .services-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }

    .service-card {
      background: var(--emerald-glass);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--gold-border);
      border-radius: var(--radius-card);
      padding: 2.5rem;
      box-shadow: var(--shadow-card);
      transition: transform 0.3s;
    }

    .service-card:hover {
      transform: translateY(-6px);
    }

    .service-main {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .gold-icon {
      color: var(--champagne-gold);
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
    }

    .service-title {
      font-size: 1.8rem;
      margin-bottom: 1rem;
    }

    .feature-list {
      list-style: none;
      margin-top: 1.5rem;
    }

    .feature-list li {
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .feature-list li i {
      color: var(--champagne-gold);
      font-size: 0.7rem;
    }

    .stack-cards {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    /* 数据仪表盘 */
    .stats-scroll {
      display: flex;
      gap: 2rem;
      overflow-x: auto;
      padding: 1rem 0 2rem;
      scrollbar-width: thin;
      scrollbar-color: var(--champagne-gold) var(--deep-amethyst);
    }

    .stat-item {
      flex: 0 0 auto;
      min-width: 180px;
      background: var(--emerald-glass);
      backdrop-filter: blur(12px);
      border: 1px solid var(--gold-border);
      border-radius: 24px;
      padding: 2rem 1.8rem;
      text-align: center;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--champagne-gold);
      font-family: var(--font-serif);
    }

    /* 案例交错 */
    .case-row {
      display: flex;
      gap: 30px;
      margin-bottom: 50px;
      align-items: center;
    }

    .case-img {
      flex: 1;
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .case-img img {
      width: 100%;
      height: 300px;
      object-fit: cover;
    }

    .img-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(11,59,54,0.65);
    }

    .case-text {
      flex: 1;
      padding: 1rem;
    }

    .case-text h3 {
      font-size: 1.8rem;
      margin-bottom: 0.8rem;
    }

    /* 方案对比 */
    .plan-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 2rem;
    }

    .plan-card {
      background: var(--emerald-glass);
      backdrop-filter: blur(12px);
      border: 1px solid var(--gold-border);
      border-radius: var(--radius-card);
      padding: 2rem;
      text-align: center;
    }

    .plan-highlight {
      border: 2px solid var(--champagne-gold);
      box-shadow: 0 0 25px rgba(212,175,55,0.25);
    }

    /* FAQ */
    .faq-item {
      background: var(--emerald-glass);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--gold-border);
      margin-bottom: 12px;
      border-radius: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 1.2rem 2rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      padding: 0 2rem;
      color: var(--text-muted);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem 2rem 1.5rem;
    }

    /* CTA */
    .cta-full {
      background: #0B1A18;
      text-align: center;
      padding: 5rem 0;
    }

    .footer {
      background: #160B24;
      padding: 4rem 0 2rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .copyright {
      text-align: center;
      color: var(--text-muted);
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 2rem;
    }

    input, textarea {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      border-radius: 8px;
      padding: 0.8rem;
      width: 100%;
      color: white;
      margin-bottom: 1rem;
    }

    input:focus {
      outline: none;
      box-shadow: 0 0 10px var(--gold-glow);
    }

    @media (max-width: 1024px) {
      .hero h1 { font-size: 2.8rem; }
      .services-grid { grid-template-columns: 1fr; }
      .plan-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .capsule-nav {
        top: auto;
        bottom: 12px;
        width: 95%;
        padding: 0.8rem 1rem;
        gap: 0.8rem;
      }
      .hero h1 { font-size: 2.2rem; }
      .case-row { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }