/* roulang page: index */
:root {
      --primary-deep: #1A1F36;
      --accent-gold: #C4924A;
      --bg-warm: #F9F7F4;
      --highlight-green: #2E5A4B;
      --text-main: #1E1E1E;
      --text-muted: #5A5A5A;
      --card-bg: #FFFFFF;
      --border-light: #E8E4DF;
      --footer-bg: #141824;
      --footer-text: #8A8F9A;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --transition-base: all 0.25s ease;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    h1, h2, h3, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 44px;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 34px;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    .text-muted-custom {
      color: var(--text-muted);
    }
    .section-padding {
      padding: 90px 0;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航悬浮胶囊 */
    .navbar-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(26, 31, 54, 0.92);
      backdrop-filter: blur(12px);
      border-radius: 40px;
      padding: 10px 32px;
      z-index: 1030;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 28px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      border: 1px solid rgba(255,255,255,0.08);
    }
    .navbar-capsule a {
      color: #FFFFFF;
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      transition: var(--transition-base);
      white-space: nowrap;
    }
    .navbar-capsule a:hover {
      color: var(--accent-gold);
    }
    .navbar-brand-capsule {
      font-weight: 700;
      font-size: 18px;
      letter-spacing: 0.5px;
      color: #FFFFFF !important;
    }
    /* 移动端底部导航 */
    .mobile-bottom-nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(26, 31, 54, 0.95);
      backdrop-filter: blur(15px);
      border-top: 1px solid rgba(255,255,255,0.1);
      display: flex;
      justify-content: space-around;
      align-items: center;
      padding: 10px 15px;
      z-index: 1030;
      border-radius: 30px 30px 0 0;
      display: none;
    }
    .mobile-bottom-nav a {
      color: #ccc;
      text-decoration: none;
      font-size: 13px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      transition: var(--transition-base);
    }
    .mobile-bottom-nav a i {
      font-size: 18px;
    }
    .mobile-bottom-nav a:hover, .mobile-bottom-nav a.active {
      color: var(--accent-gold);
    }
    @media (max-width: 768px) {
      .navbar-capsule {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
      }
      body {
        padding-bottom: 70px;
      }
      h1 {
        font-size: 30px;
      }
      h2 {
        font-size: 26px;
      }
      .section-padding {
        padding: 60px 0;
      }
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #1A1F36 0%, #141824 100%);
      position: relative;
      overflow: hidden;
      padding: 160px 0 120px;
      color: white;
    }
    .hero-bg-pattern {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400"><path d="M50 50 L150 50 L150 150 L50 150 Z" fill="none" stroke="%23C4924A" stroke-width="0.8" opacity="0.08"/><circle cx="300" cy="200" r="60" fill="none" stroke="%232E5A4B" stroke-width="0.8" opacity="0.06"/></svg>');
      opacity: 0.2;
      pointer-events: none;
    }
    .hero-title {
      color: white;
      font-weight: 700;
    }
    .hero-sub {
      color: #B0B8C1;
      font-size: 18px;
      max-width: 500px;
    }
    .btn-primary-custom {
      background: var(--accent-gold);
      border: none;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary-custom:hover {
      background: #b3813e;
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline-custom:hover {
      background: var(--primary-deep);
      color: white;
    }
    .hero-stats .stat-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent-gold);
    }
    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      padding: 32px;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .icon-circle {
      font-size: 40px;
      color: var(--highlight-green);
      margin-bottom: 20px;
    }
    /* 功能分组 */
    .feature-block {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    /* 步骤条 */
    .step-item {
      position: relative;
      text-align: center;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--accent-gold);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 20px;
      margin: 0 auto 15px;
    }
    .step-line {
      position: absolute;
      top: 24px;
      left: 65%;
      width: 70%;
      height: 1px;
      background: var(--border-light);
    }
    @media (max-width: 768px) {
      .step-line {
        display: none;
      }
      .step-item {
        margin-bottom: 30px;
      }
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--accent-gold);
      box-shadow: none;
      font-weight: 600;
    }
    .accordion-button:focus {
      border-color: var(--border-light);
      box-shadow: none;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    /* CTA */
    .cta-banner {
      background: var(--primary-deep);
      border-radius: var(--radius-card);
      padding: 60px 40px;
    }
    footer {
      background: var(--footer-bg);
      color: var(--footer-text);
      padding: 60px 0 30px;
    }
    footer a {
      color: var(--footer-text);
      text-decoration: none;
      transition: var(--transition-base);
    }
    footer a:hover {
      color: var(--accent-gold);
    }