/* roulang page: index */
/* ===== 设计变量与全局重置 ===== */
    :root {
      --primary-bg: #0B0C10;
      --secondary-bg: #1A1A1A;
      --gold: #C9A96E;
      --gold-dim: rgba(201, 169, 110, 0.25);
      --wine: #6B2D2D;
      --text-soft: #B0B0B0;
      --text-muted: #8A8A8A;
      --border-light: rgba(201, 169, 110, 0.25);
      --card-shadow: 0 8px 24px rgba(0,0,0,0.4);
      --hover-glow: 0 0 18px rgba(201,169,110,0.35);
      --radius-card: 12px;
      --radius-btn: 6px;
      --transition: 0.25s ease-in-out;
      --container-max: 1280px;
      --font-serif: 'Noto Serif SC', '思源宋体', serif;
      --font-sans: 'Noto Sans SC', 'PingFang SC', '思源黑体', sans-serif;
      --font-number: 'Playfair Display', 'Georgia', serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--primary-bg);
      color: var(--text-soft);
      font-family: var(--font-sans);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      transition: all var(--transition);
    }

    h1, h2, h3 {
      font-family: var(--font-serif);
      font-weight: 600;
      line-height: 1.3;
    }

    h1 {
      font-size: 3rem;
      letter-spacing: 1px;
    }
    h2 {
      font-size: 2.4rem;
      margin-bottom: 0.5rem;
    }
    h3 {
      font-size: 1.5rem;
    }

    /* ===== 导航系统 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.75);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--gold-dim);
      transition: background 0.3s, border-color 0.3s;
    }
    .site-header.scrolled {
      background: #0B0C10;
      border-bottom-color: var(--gold);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--gold);
      letter-spacing: 2px;
    }
    .logo i {
      font-size: 2rem;
      color: var(--gold);
    }
    .nav-menu {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-menu a {
      color: var(--text-soft);
      font-weight: 500;
      position: relative;
      padding: 4px 0;
      font-size: 0.95rem;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--gold);
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--gold);
    }
    .btn-login {
      background: linear-gradient(135deg, #C9A96E 0%, #A8874A 100%);
      color: #0B0C10;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-size: 0.9rem;
      letter-spacing: 1px;
      border: none;
      box-shadow: 0 4px 12px rgba(201,169,110,0.3);
    }
    .btn-login:hover {
      box-shadow: var(--hover-glow);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      display: block;
      width: 26px;
      height: 2px;
      background: var(--gold);
      transition: 0.3s;
    }
    .mobile-overlay {
      display: none;
    }

    /* ===== 首屏 Hero ===== */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(11,12,16,0.65);
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(201,169,110,0.1) 0%, transparent 60%);
      animation: slowPulse 8s infinite alternate;
    }
    @keyframes slowPulse {
      0% { opacity: 0.3; transform: scale(1); }
      100% { opacity: 0.7; transform: scale(1.05); }
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 780px;
      margin-top: -40px;
    }
    .hero h1 {
      color: #F5F0E6;
      font-size: 3.4rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
      background: linear-gradient(to right, #F5F0E6, #C9A96E);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero p {
      font-size: 1.2rem;
      color: #D0C8B8;
      margin-bottom: 2.5rem;
    }
    .btn-group {
      display: flex;
      gap: 18px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #C9A96E, #A8874A);
      color: #0B0C10;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      letter-spacing: 1px;
      transition: 0.3s;
    }
    .btn-primary:hover {
      box-shadow: 0 0 22px rgba(201,169,110,0.6);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--gold);
      color: var(--gold);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(201,169,110,0.12);
    }

    /* ===== 通用板块 ===== */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      color: #F5F0E6;
    }
    .section-title p {
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }

    /* 优势区块 不对称栅格 */
    .features-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.9fr;
      gap: 24px;
    }
    .feature-large {
      background: var(--secondary-bg);
      border-radius: var(--radius-card);
      padding: 36px;
      border-left: 5px solid var(--gold);
      box-shadow: var(--card-shadow);
    }
    .feature-small-group {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .feature-card {
      background: var(--secondary-bg);
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      border: 1px solid rgba(201,169,110,0.15);
    }
    .feature-icon {
      font-size: 2.5rem;
      color: var(--gold);
    }
    .feature-text h3 {
      color: #E0D3B8;
    }

    /* 服务卡片 横向滚动 */
    .services-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
      scrollbar-color: var(--gold) #1A1A1A;
    }
    .service-card {
      min-width: 260px;
      background: rgba(26,26,26,0.8);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(201,169,110,0.2);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: 0.3s;
      position: relative;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
      background-blend-mode: overlay;
      background-color: rgba(26,26,26,0.9);
    }
    .service-card:hover {
      border-color: var(--gold);
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(201,169,110,0.2);
    }
    .service-card h3 {
      color: var(--gold);
    }

    /* VIP流程 时间轴 */
    .timeline {
      display: flex;
      flex-direction: column;
      gap: 32px;
      position: relative;
      padding-left: 40px;
    }
    .timeline::before {
      content: '';
      position: absolute;
      left: 18px;
      top: 10px;
      bottom: 10px;
      width: 2px;
      background: var(--gold-dim);
    }
    .timeline-item {
      display: flex;
      gap: 28px;
      align-items: flex-start;
    }
    .timeline-dot {
      width: 16px;
      height: 16px;
      background: var(--gold);
      border-radius: 50%;
      box-shadow: 0 0 12px var(--gold);
      margin-top: 6px;
    }

    /* 统计数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 3.2rem;
      color: var(--gold);
      font-weight: 700;
    }

    /* FAQ */
    .faq-item {
      background: var(--secondary-bg);
      border-bottom: 1px solid #2C2C2C;
      margin-bottom: 8px;
      border-radius: 8px;
    }
    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      font-weight: 500;
      color: #E0D3B8;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 24px;
      color: var(--text-soft);
    }
    .faq-item.active .faq-answer {
      max-height: 160px;
      padding: 0 24px 20px;
    }
    .faq-item.active {
      border-left: 4px solid var(--gold);
    }

    /* CTA 横幅 */
    .cta-band {
      background: linear-gradient(rgba(11,12,16,0.9), rgba(11,12,16,0.95)), url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      text-align: center;
      padding: 80px 20px;
    }

    /* 页脚 */
    .footer {
      background: #0B0C10;
      border-top: 1px solid var(--gold);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 32px;
    }

    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .features-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 2.2rem; }
      .stats-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .timeline { padding-left: 24px; }
    }