/* roulang page: index */
:root {
      --deep-space: #0B0E14;
      --star-gold: #D9A066;
      --star-gold-hover: #C58C4F;
      --white-soft: #EAE8E3;
      --warm-white: #F7F5F0;
      --charcoal: #1E2127;
      --dust-gray: #3A3E45;
      --border-light: #D6D3CC;
      --aurora-green: #5E9E8C;
      --card-bg-dark: #161A20;
      --card-border-dark: #2A2E35;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-light: 0 8px 28px rgba(0,0,0,0.04);
      --shadow-dark: 0 12px 36px rgba(0,0,0,0.35);
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: var(--charcoal);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    h1, h2, h3, h4 {
      font-weight: 600;
      letter-spacing: -0.2px;
    }

    h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
    }

    h2 {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 600;
    }

    h3 {
      font-size: 20px;
      line-height: 1.4;
      font-weight: 600;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 600;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    /* 导航栏双行杂志风格 */
    .main-header {
      background-color: var(--deep-space);
      border-bottom: 1px solid var(--dust-gray);
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .brand-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
    }

    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--star-gold);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      font-size: 22px;
      color: var(--star-gold);
    }

    .nav-icons {
      display: flex;
      gap: 20px;
      color: var(--dust-gray);
      font-size: 18px;
    }

    .channel-row {
      display: flex;
      gap: 36px;
      padding: 12px 0 14px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
      scrollbar-color: var(--dust-gray) transparent;
    }

    .channel-row a {
      font-size: 15px;
      font-weight: 500;
      color: var(--white-soft);
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }

    .channel-row a:hover,
    .channel-row a.active {
      color: var(--star-gold);
      border-bottom-color: var(--star-gold);
    }

    /* 汉堡菜单（移动端） */
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--white-soft);
      font-size: 26px;
    }

    @media (max-width: 1024px) {
      .channel-row {
        gap: 24px;
      }
    }

    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .channel-row {
        display: none;
        flex-direction: column;
        background: var(--deep-space);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 20px 32px;
        gap: 20px;
        border-top: 1px solid var(--dust-gray);
      }
      .channel-row.open {
        display: flex;
      }
    }

    /* Hero 区块 */
    .hero {
      background-color: var(--deep-space);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 100px 0 120px;
      color: var(--white-soft);
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(217,160,102,0.08) 0%, transparent 70%);
    }
    .hero .container {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 1;
    }
    .hero-text h1 {
      color: white;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: #B0B3B8;
      margin-bottom: 36px;
      max-width: 480px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--star-gold);
      color: var(--deep-space);
      padding: 14px 36px;
      font-size: 16px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-btn);
    }
    .btn-primary:hover {
      background: var(--star-gold-hover);
      box-shadow: 0 0 28px rgba(217,160,102,0.45);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--star-gold);
      color: var(--star-gold);
      padding: 14px 36px;
      font-size: 16px;
    }
    .btn-outline:hover {
      background: rgba(217,160,102,0.08);
    }
    .hero-image {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero-image img {
      max-height: 380px;
      border-radius: 16px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }

    @media (max-width: 1024px) {
      .hero .container {
        flex-direction: column;
        text-align: center;
      }
      .hero-text h1 {
        font-size: 40px;
      }
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      color: var(--charcoal);
    }
    .bg-dark {
      background-color: var(--deep-space);
      color: var(--white-soft);
    }
    .bg-dark .section-title h2 {
      color: white;
    }

    /* 卡片网格 */
    .grid-3, .grid-4 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }

    .card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-light);
      transition: var(--transition);
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: 0 18px 38px rgba(0,0,0,0.08);
    }
    .dark-card {
      background: var(--card-bg-dark);
      border: 1px solid var(--card-border-dark);
      box-shadow: none;
    }
    .dark-card:hover {
      border-color: var(--star-gold);
      box-shadow: var(--shadow-dark);
    }

    .icon-gold {
      color: var(--star-gold);
      font-size: 40px;
      margin-bottom: 20px;
    }

    .tag {
      display: inline-block;
      background: rgba(217,160,102,0.12);
      color: var(--star-gold);
      font-size: 13px;
      padding: 4px 12px;
      border-radius: 20px;
      margin-top: 16px;
    }

    /* 场景左右交替 */
    .scene-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .scene-row.reverse {
      flex-direction: row-reverse;
    }
    .scene-text {
      flex: 1;
    }
    .scene-img {
      flex: 1;
    }
    .scene-img img {
      border-radius: var(--radius-card);
      border: 1px solid var(--border-light);
    }

    /* 数据卡片 */
    .stat-number {
      font-size: 44px;
      font-weight: 700;
      color: var(--star-gold);
    }

    /* 价格卡 */
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 40px 28px;
      text-align: center;
      border: 1px solid var(--border-light);
    }
    .pricing-card.featured {
      border: 2px solid var(--star-gold);
      box-shadow: 0 20px 36px rgba(217,160,102,0.1);
    }
    .price {
      font-size: 42px;
      font-weight: 700;
      color: var(--deep-space);
      margin: 20px 0;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 22px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #4A4F57;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 14px;
    }

    .cta-final {
      background: var(--deep-space);
      text-align: center;
      padding: 110px 0;
    }

    footer {
      background: var(--deep-space);
      color: #B0B3B8;
      padding: 70px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .scene-row { flex-direction: column; }
      h1 { font-size: 34px; }
      h2 { font-size: 26px; }
    }