/* roulang page: index */
:root {
      --lemon-yellow: #C8E600;
      --lemon-light: #D4F02A;
      --deep-green: #1A3B2B;
      --warm-gray: #F7F9F2;
      --vivid-orange: #FF6B35;
      --orange-hover: #E55A2B;
      --text-primary: #1A3B2B;
      --text-body: #3A4A3F;
      --text-muted: #6B7B6F;
      --white: #ffffff;
      --card-shadow: 0 4px 20px rgba(26, 59, 43, 0.06);
      --card-shadow-hover: 0 8px 30px rgba(26, 59, 43, 0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --transition-smooth: all 0.25s ease;
      --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-family);
      background-color: var(--warm-gray);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding-top: 70px;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-primary);
      font-weight: 700;
      line-height: 1.3;
    }

    h1 {
      font-size: 3.8rem;
      font-weight: 800;
    }

    h2 {
      font-size: 2.4rem;
      margin-bottom: 0.5rem;
    }

    .section-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 2.5rem;
    }

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

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

    .container {
      max-width: 1140px;
      padding-left: 15px;
      padding-right: 15px;
    }

    /* 导航栏 */
    .navbar {
      background-color: transparent;
      transition: var(--transition-smooth);
      padding: 0.8rem 0;
      z-index: 1030;
      border-bottom: 2px solid transparent;
    }

    .navbar.scrolled {
      background-color: var(--white);
      box-shadow: 0 2px 15px rgba(0,0,0,0.05);
      border-bottom: 2px solid var(--lemon-yellow);
    }

    .navbar-brand {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--lemon-yellow) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }

    .navbar-brand span {
      color: var(--white);
      margin-left: 5px;
    }

    .navbar.scrolled .navbar-brand {
      color: var(--lemon-yellow) !important;
    }
    .navbar.scrolled .navbar-brand span {
      color: var(--deep-green);
    }

    .navbar-dark .navbar-nav .nav-link {
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      padding: 0.5rem 1rem;
      transition: var(--transition-smooth);
      border-radius: 20px;
    }

    .navbar.scrolled .navbar-nav .nav-link {
      color: var(--deep-green);
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--lemon-yellow) !important;
      background-color: rgba(255,255,255,0.1);
    }

    .navbar.scrolled .navbar-nav .nav-link:hover,
    .navbar.scrolled .navbar-nav .nav-link.active {
      color: var(--deep-green) !important;
      background-color: rgba(200,230,0,0.1);
    }

    .navbar-toggler {
      border: none;
      padding: 0.5rem;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 2px var(--lemon-yellow);
    }

    .offcanvas {
      background-color: rgba(26, 59, 43, 0.95);
      backdrop-filter: blur(10px);
    }

    .offcanvas .nav-link {
      color: var(--white) !important;
      font-size: 1.2rem;
    }

    .offcanvas .nav-link:hover {
      color: var(--lemon-yellow) !important;
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(135deg, rgba(26,59,43,0.78) 0%, rgba(26,59,43,0.45) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: var(--white);
      position: relative;
      margin-top: -70px;
      padding-top: 70px;
    }

    .hero-content h1 {
      color: var(--white);
      text-shadow: 0 4px 20px rgba(0,0,0,0.3);
      margin-bottom: 1.5rem;
    }

    .hero-content .lead {
      font-size: 1.3rem;
      color: rgba(255,255,255,0.9);
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .btn-primary-lemon {
      background-color: var(--lemon-yellow);
      color: var(--deep-green);
      font-weight: 600;
      border: none;
      padding: 0.75rem 2rem;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-smooth);
    }

    .btn-primary-lemon:hover {
      background-color: #B2CC00;
      transform: scale(1.03);
      color: var(--deep-green);
    }

    .btn-outline-white {
      background: transparent;
      border: 2px solid var(--white);
      color: var(--white);
      font-weight: 600;
      padding: 0.75rem 2rem;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-smooth);
    }

    .btn-outline-white:hover {
      background-color: var(--white);
      color: var(--deep-green);
    }

    .btn-cta-orange {
      background-color: var(--vivid-orange);
      color: var(--white);
      font-weight: 700;
      font-size: 1.2rem;
      padding: 1rem 3rem;
      border-radius: var(--border-radius-btn);
      border: none;
      transition: var(--transition-smooth);
    }

    .btn-cta-orange:hover {
      background-color: var(--orange-hover);
      transform: scale(1.02);
      color: var(--white);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--lemon-yellow);
      font-size: 2rem;
    }

    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-5px); }
    }

    /* 通用区块 */
    section {
      padding: 5rem 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 3.5rem 0;
      }
      h1 {
        font-size: 2.5rem;
      }
      h2 {
        font-size: 1.9rem;
      }
    }

    /* 痛点卡片 */
    .pain-card {
      background: var(--white);
      border-radius: var(--border-radius-card);
      padding: 2rem;
      box-shadow: none;
      border-left: 4px solid transparent;
      transition: var(--transition-smooth);
      height: 100%;
    }

    .pain-card:hover {
      border-left: 4px solid var(--lemon-yellow);
      box-shadow: var(--card-shadow);
      transform: translateY(-3px);
    }

    .pain-icon {
      font-size: 2.5rem;
      color: var(--lemon-yellow);
    }

    /* 解决方案图文 */
    .solution-img {
      border-radius: 16px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
    }

    .solution-text h3 {
      color: var(--deep-green);
    }

    .list-lemon {
      list-style: none;
      padding-left: 0;
    }

    .list-lemon li::before {
      content: "●";
      color: var(--lemon-yellow);
      font-weight: bold;
      display: inline-block;
      width: 1.5rem;
    }

    /* 核心优势卡片 */
    .adv-card {
      background: var(--white);
      border-radius: var(--border-radius-card);
      padding: 2rem 1.8rem;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      height: 100%;
      border-top: 4px solid transparent;
    }

    .adv-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--card-shadow-hover);
      border-top: 4px solid var(--lemon-yellow);
    }

    .icon-circle {
      background-color: var(--lemon-yellow);
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.2rem;
      color: var(--deep-green);
      font-size: 2rem;
    }

    /* 成果深色背景 */
    .results-section {
      background-color: var(--deep-green);
      color: var(--white);
    }

    .stat-number {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--lemon-yellow);
      line-height: 1.2;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: var(--white);
      border-radius: var(--border-radius-card);
      padding: 2rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
    }

    .testimonial-card:hover {
      box-shadow: var(--card-shadow-hover);
    }

    .avatar-img {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      object-fit: cover;
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      color: var(--deep-green);
      background-color: transparent;
      border: 1px solid var(--lemon-yellow);
      border-radius: var(--border-radius-card) !important;
      padding: 1.2rem 1.5rem;
    }

    .accordion-button:not(.collapsed) {
      background-color: rgba(200,230,0,0.08);
      color: var(--deep-green);
      box-shadow: none;
    }

    .accordion-button:focus {
      border-color: var(--lemon-yellow);
      box-shadow: 0 0 0 2px rgba(200,230,0,0.3);
    }

    .accordion-item {
      border: none;
      margin-bottom: 1rem;
      background: transparent;
    }

    /* CTA区 */
    .cta-full {
      background-color: var(--lemon-yellow);
      color: var(--deep-green);
    }

    /* 页脚 */
    .footer-dark {
      background-color: var(--deep-green);
      color: rgba(255,255,255,0.8);
    }

    .footer-dark a {
      color: rgba(255,255,255,0.9);
    }

    .footer-dark a:hover {
      color: var(--lemon-yellow);
    }

    .footer-logo {
      font-size: 2rem;
      font-weight: 700;
      color: var(--lemon-yellow);
    }