/* roulang page: index */
:root {
      --deep-midnight: #0B1A2E;
      --slightly-lighter: #10233A;
      --molten-gold: #F0A500;
      --molten-gold-soft: rgba(240, 165, 0, 0.15);
      --pure-white: #FFFFFF;
      --body-gray: #B0C4DE;
      --muted-gray: #6B7F94;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(255, 255, 255, 0.08);
      --card-radius: 18px;
      --btn-radius: 40px;
      --transition-base: all 0.3s ease;
      --shadow-glow: 0 0 24px rgba(240, 165, 0, 0.5);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    }

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

    body {
      background-color: var(--deep-midnight);
      color: var(--body-gray);
      font-family: var(--font-sans);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      color: var(--pure-white);
      font-weight: 600;
      letter-spacing: -0.01em;
    }

    a {
      text-decoration: none;
      color: var(--body-gray);
      transition: var(--transition-base);
    }
    a:hover {
      color: var(--molten-gold);
    }

    .container {
      max-width: 1140px;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 */
    .navbar {
      background-color: rgba(11, 26, 46, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 12px 0;
      transition: var(--transition-base);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--pure-white);
      letter-spacing: 2px;
    }
    .navbar-brand span {
      color: var(--molten-gold);
    }
    .nav-link {
      color: var(--body-gray) !important;
      font-weight: 500;
      margin: 0 8px;
      padding: 8px 16px !important;
      border-radius: 30px;
      transition: var(--transition-base);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--pure-white) !important;
      background: rgba(255,255,255,0.05);
    }
    .btn-primary-glow {
      background: var(--molten-gold);
      border: none;
      color: var(--deep-midnight);
      font-weight: 700;
      padding: 10px 28px;
      border-radius: var(--btn-radius);
      letter-spacing: 0.5px;
      transition: var(--transition-base);
      box-shadow: 0 4px 14px rgba(240,165,0,0.3);
    }
    .btn-primary-glow:hover {
      background: #ffb81c;
      box-shadow: var(--shadow-glow);
      color: var(--deep-midnight);
      transform: translateY(-1px);
    }
    .navbar-toggler {
      border: 1px solid rgba(255,255,255,0.2);
      color: var(--pure-white);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(135deg, rgba(11,26,46,0.82) 0%, rgba(16,35,58,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      position: relative;
      border-bottom: 1px solid rgba(240,165,0,0.15);
    }
    .hero-content h1 {
      font-size: 3.4rem;
      font-weight: 700;
      line-height: 1.3;
    }
    .hero-content .highlight {
      color: var(--molten-gold);
    }
    .hero-sub {
      font-size: 1.25rem;
      color: #cbd5e0;
      max-width: 600px;
      margin: 24px 0 32px;
    }
    .btn-outline-gold {
      border: 1.5px solid var(--molten-gold);
      color: var(--molten-gold);
      background: transparent;
      padding: 10px 28px;
      border-radius: var(--btn-radius);
      font-weight: 600;
      transition: var(--transition-base);
    }
    .btn-outline-gold:hover {
      background: var(--molten-gold-soft);
      color: var(--molten-gold);
      border-color: var(--molten-gold);
    }

    /* 通用区块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 650;
      margin-bottom: 16px;
      color: var(--pure-white);
    }
    .section-sub {
      color: var(--muted-gray);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .pain-text li {
      color: var(--body-gray);
      font-size: 1.2rem;
      margin-bottom: 24px;
      list-style: none;
      display: flex;
      align-items: flex-start;
    }
    .pain-text li i {
      color: var(--molten-gold);
      margin-right: 12px;
      font-size: 1.4rem;
    }
    .pain-visual {
      background: radial-gradient(circle at 30% 30%, rgba(240,165,0,0.18), transparent 70%);
      height: 260px;
      border-radius: 28px;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--card-radius);
      padding: 2rem;
      transition: all 0.35s ease;
      box-shadow: 0 8px 20px rgba(0,0,0,0.25);
      height: 100%;
    }
    .glass-card:hover {
      border-color: rgba(240,165,0,0.4);
      box-shadow: 0 16px 32px rgba(0,0,0,0.4), 0 0 18px rgba(240,165,0,0.15);
      transform: translateY(-6px);
    }
    .card-img-top {
      border-radius: 14px 14px 0 0;
      aspect-ratio: 16/9;
      object-fit: cover;
      width: 100%;
      margin-bottom: 20px;
    }
    .glass-card h3 {
      font-size: 1.4rem;
      margin-bottom: 12px;
    }
    .text-gold {
      color: var(--molten-gold);
      font-weight: 600;
    }

    /* 成果面板 */
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--molten-gold);
      line-height: 1.2;
    }
    .result-card {
      background: rgba(255,255,255,0.02);
      border-left: 3px solid var(--molten-gold);
      padding: 24px;
      border-radius: 14px;
      backdrop-filter: blur(10px);
    }

    /* 证言 */
    .testimonial-avatar {
      width: 56px;
      height: 56px;
      background: linear-gradient(145deg, #F0A500, #5f3b00);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: bold;
      font-size: 1.5rem;
      margin-right: 16px;
    }

    /* FAQ */
    .accordion-button {
      background: transparent;
      color: var(--pure-white);
      font-weight: 600;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      font-size: 1.1rem;
    }
    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--molten-gold);
      box-shadow: none;
    }
    .accordion-button::after {
      filter: brightness(0) invert(1);
    }
    .accordion-body {
      color: var(--body-gray);
      background: rgba(0,0,0,0.2);
      border-radius: 0 0 12px 12px;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #0a1625, #0B1A2E);
      border-top: 1px solid rgba(240,165,0,0.2);
      border-bottom: 1px solid rgba(240,165,0,0.2);
    }

    /* 页脚 */
    .footer {
      background: #091420;
      color: var(--muted-gray);
    }
    .footer a {
      color: var(--body-gray);
    }
    .footer a:hover {
      color: var(--molten-gold);
    }
    .footer-brand {
      font-size: 1.6rem;
      font-weight: 700;
      color: white;
    }

    @media (max-width: 768px) {
      .hero-section {
        min-height: 70vh;
        text-align: center;
      }
      .hero-content h1 {
        font-size: 2.2rem;
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .navbar-collapse {
        background: rgba(11,26,46,0.98);
        padding: 20px;
        border-radius: 16px;
        margin-top: 12px;
      }
      .btn-primary-glow {
        width: 100%;
        margin-top: 10px;
      }
      section {
        padding: 56px 0;
      }
    }