/* roulang page: index */
:root {
      --primary-deep: #1A3C34;
      --accent-gold: #C59B5F;
      --bg-warm: #FAFAF8;
      --bg-dark: #0F2620;
      --text-main: #1E1E1E;
      --text-secondary: #5C5C5C;
      --text-light: #F5F5F0;
      --white: #FFFFFF;
      --border-light: #E8E5DF;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
      --shadow-card-hover: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-pill: 20px;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
      --font-sans: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-smooth: 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, .serif-title {
      font-family: var(--font-serif);
      font-weight: 600;
    }
    
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 */
    #main-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(250, 250, 248, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: background 0.3s ease;
      border-bottom: 1px solid transparent;
    }
    
    #main-nav.scrolled {
      background: rgba(250, 250, 248, 0.98);
      border-bottom: 1px solid var(--border-light);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .logo-icon {
      font-size: 28px;
      color: var(--primary-deep);
    }
    
    .logo-text {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-deep);
      letter-spacing: 1px;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .nav-chip {
      background: transparent;
      color: var(--text-main);
      border: none;
      padding: 8px 16px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 500;
      transition: all 0.25s ease;
      text-decoration: none;
      white-space: nowrap;
    }
    
    .nav-chip:hover {
      background: var(--primary-deep);
      color: white;
    }
    
    .nav-chip.active {
      background: var(--primary-deep);
      color: white;
    }
    
    .nav-cta-btn {
      background: var(--primary-deep);
      color: white;
      border: none;
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      margin-left: 24px;
      transition: all 0.25s ease;
      text-decoration: none;
      white-space: nowrap;
    }
    
    .nav-cta-btn:hover {
      background: var(--bg-dark);
      box-shadow: 0 0 0 3px rgba(26,60,52,0.15);
      color: white;
    }
    
    .navbar-toggler {
      border: none;
      color: var(--primary-deep);
      font-size: 24px;
    }
    
    .navbar-toggler:focus {
      box-shadow: none;
    }
    
    @media (max-width: 991px) {
      .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 4px;
      }
      .nav-cta-btn {
        margin-left: 8px;
      }
    }
    
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(250,250,248,0.98);
        backdrop-filter: blur(12px);
        padding: 20px;
        gap: 12px;
        border-bottom: 1px solid var(--border-light);
        align-items: flex-start;
      }
      .nav-cta-btn {
        margin-left: 0;
        width: 100%;
        text-align: center;
      }
    }
    
    /* Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 72px;
      background: var(--bg-warm);
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      width: 100%;
    }
    
    .hero-text {
      flex: 1;
      max-width: 600px;
    }
    
    .hero-badge {
      display: inline-block;
      background: rgba(26,60,52,0.08);
      color: var(--primary-deep);
      font-size: 14px;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      margin-bottom: 24px;
      font-weight: 500;
    }
    
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    
    .gold-line {
      width: 40px;
      height: 3px;
      background: var(--accent-gold);
      margin-bottom: 24px;
      transition: width 0.8s ease;
    }
    
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 480px;
      margin-bottom: 32px;
      line-height: 1.6;
    }
    
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary-custom {
      background: var(--primary-deep);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.25s ease;
      text-decoration: none;
    }
    
    .btn-primary-custom:hover {
      background: var(--bg-dark);
      box-shadow: 0 0 0 3px rgba(26,60,52,0.15);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      color: var(--primary-deep);
      border: 1.5px solid var(--primary-deep);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.25s ease;
      text-decoration: none;
    }
    
    .btn-outline-custom:hover {
      background: var(--primary-deep);
      color: white;
    }
    
    .hero-image {
      flex: 1;
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      min-height: 400px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      box-shadow: var(--shadow-card);
    }
    
    .hero-image::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      width: 40%;
      height: 100%;
      background: linear-gradient(to right, var(--bg-warm), transparent);
      z-index: 2;
    }
    
    @media (max-width: 992px) {
      .hero-title {
        font-size: 36px;
      }
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero-text {
        max-width: 100%;
      }
      .hero-sub {
        max-width: 100%;
      }
      .hero-actions {
        justify-content: center;
      }
      .gold-line {
        margin: 0 auto 24px;
      }
    }
    
    /* 通用板块 */
    section {
      padding: 120px 0;
    }
    
    @media (max-width: 768px) {
      section {
        padding: 80px 0;
      }
    }
    
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    
    .section-sub {
      color: var(--text-secondary);
      max-width: 680px;
      margin-bottom: 48px;
    }
    
    /* 痛点区 */
    .pain-row {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 60px;
    }
    
    .pain-row.reverse {
      flex-direction: row-reverse;
    }
    
    .pain-text {
      flex: 1;
    }
    
    .pain-image {
      flex: 1;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    
    .pain-image img {
      width: 100%;
      height: auto;
      display: block;
    }
    
    .divider-line {
      height: 1px;
      background: var(--border-light);
      margin: 40px 0;
    }
    
    @media (max-width: 768px) {
      .pain-row, .pain-row.reverse {
        flex-direction: column;
      }
    }
    
    /* 解决方案非对称 */
    .solution-large {
      display: flex;
      background: #F4F7F5;
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 32px;
    }
    
    .solution-large-text {
      padding: 40px;
      flex: 1;
    }
    
    .solution-large-img {
      flex: 1;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      min-height: 300px;
    }
    
    .solution-small-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    
    .solution-card {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
    }
    
    .solution-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }
    
    .text-link {
      color: var(--accent-gold);
      font-weight: 500;
      text-decoration: none;
      transition: 0.2s;
    }
    
    .text-link:hover {
      text-decoration: underline;
      color: var(--accent-gold);
    }
    
    @media (max-width: 768px) {
      .solution-large {
        flex-direction: column;
      }
      .solution-small-grid {
        grid-template-columns: 1fr;
      }
    }
    
    /* 成果数据 */
    .dark-bg {
      background: var(--bg-dark);
      color: var(--text-light);
    }
    
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      text-align: center;
    }
    
    .stat-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--accent-gold);
      font-family: var(--font-serif);
    }
    
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    
    /* 证言横向滚动 */
    .testimonial-scroll {
      display: flex;
      overflow-x: auto;
      gap: 24px;
      padding: 10px 0;
      scroll-behavior: smooth;
    }
    
    .testimonial-card {
      min-width: 380px;
      background: var(--white);
      border-left: 3px solid var(--accent-gold);
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      font-style: italic;
    }
    
    /* FAQ */
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      background: transparent;
      box-shadow: none;
    }
    
    .accordion-button:not(.collapsed) {
      background: #F9F8F5;
      color: var(--primary-deep);
    }
    
    /* CTA */
    .cta-full {
      background: var(--primary-deep);
      padding: 80px 0;
      text-align: center;
    }
    
    .btn-gold {
      background: var(--accent-gold);
      color: var(--primary-deep);
      font-weight: 700;
    }
    
    .btn-gold:hover {
      background: #D4AD6E;
    }
    
    /* Footer */
    footer {
      background: var(--bg-dark);
      color: #A0A89E;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    
    .scroll-fade {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .scroll-fade.visible {
      opacity: 1;
      transform: translateY(0);
    }