/* roulang page: index */
/* 全局设计变量与基础重置 */
    :root {
      --color-gold: #D4883C;
      --color-rust: #C75B39;
      --color-charcoal: #2B2B2B;
      --color-paper: #F5F0E8;
      --color-white: #FFFFFF;
      --color-border: #E8E0D5;
      --color-muted: #6B625A;
      --color-text-light: rgba(255,255,255,0.85);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", "SF Pro Display", sans-serif;
      --shadow-card: 0 4px 20px rgba(44,35,28,0.06);
      --shadow-card-hover: 0 12px 32px rgba(44,35,28,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --radius-container: 16px;
      --transition-smooth: 0.3s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--color-paper);
      color: var(--color-charcoal);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all var(--transition-smooth);
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 板块间距 */
    section {
      padding: 120px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 80px 0;
      }
    }

    /* 叙述性标题样式 */
    h2 {
      font-size: 40px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--color-charcoal);
      letter-spacing: -0.01em;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 12px;
    }

    .section-divider {
      width: 60px;
      height: 4px;
      background-color: var(--color-gold);
      margin-bottom: 32px;
      border-radius: 2px;
    }

    /* 导航样式 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(20px) saturate(150%);
      -webkit-backdrop-filter: blur(20px) saturate(150%);
      border-bottom: 1px solid rgba(255,255,255,0.15);
      box-shadow: 0 4px 30px rgba(0,0,0,0.08);
      transition: background var(--transition-smooth), border-color var(--transition-smooth);
    }

    .header.scrolled {
      background: rgba(245,240,232,0.98);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    }

    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 20px;
      font-weight: 700;
      color: var(--color-gold);
      letter-spacing: 0.5px;
    }

    .logo i {
      font-size: 24px;
      color: var(--color-gold);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      color: var(--color-text-light);
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding: 4px 0;
    }

    .header.scrolled .nav-links a {
      color: var(--color-charcoal);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--color-gold);
      transition: width 0.25s ease;
    }

    .nav-links a:hover {
      color: #fff;
    }

    .header.scrolled .nav-links a:hover {
      color: var(--color-gold);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      border: 1px solid var(--color-gold);
      color: var(--color-gold) !important;
      padding: 8px 20px;
      border-radius: 24px;
      font-weight: 600;
      background: transparent;
      transition: all 0.25s;
    }

    .nav-cta:hover {
      background: var(--color-gold);
      color: #fff !important;
    }

    .header.scrolled .nav-cta {
      color: var(--color-gold) !important;
      border-color: var(--color-gold);
    }

    .header.scrolled .nav-cta:hover {
      background: var(--color-gold);
      color: #fff !important;
    }

    .mobile-menu-toggle {
      display: none;
      font-size: 24px;
      color: var(--color-gold);
      background: none;
      border: none;
      cursor: pointer;
    }

    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(245,240,232,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        gap: 24px;
        padding: 32px 0;
        border-bottom: 1px solid var(--color-border);
        display: none;
        box-shadow: 0 8px 20px rgba(0,0,0,0.08);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        color: var(--color-charcoal);
        font-size: 18px;
      }
      .mobile-menu-toggle {
        display: block;
      }
    }

    /* Hero 首屏 */
    .hero {
      height: 100vh;
      min-height: 600px;
      background: linear-gradient(160deg, rgba(44,35,28,0.85) 0%, rgba(75,54,33,0.65) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      position: relative;
      color: #fff;
    }

    .hero-content {
      max-width: 600px;
    }

    .hero h1 {
      font-size: 56px;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      color: #fff;
    }

    .hero p {
      font-size: 18px;
      font-weight: 300;
      color: rgba(255,255,255,0.8);
      max-width: 480px;
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--color-rust);
      color: #fff;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      display: inline-block;
    }

    .btn-primary:hover {
      background: #A84A2E;
      box-shadow: 0 0 0 4px rgba(199,91,57,0.3);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid #fff;
      color: #fff;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 500;
    }

    .btn-outline:hover {
      background: #fff;
      color: var(--color-charcoal);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(255,255,255,0.5);
      font-size: 24px;
      animation: bounce 2s infinite;
    }

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

    @media (max-width: 768px) {
      .hero h1 { font-size: 36px; }
      .hero p { font-size: 16px; }
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .pain-card {
      background: var(--color-white);
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--color-gold);
      transition: all var(--transition-smooth);
    }

    .pain-card:hover {
      border-left-width: 8px;
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }

    @media (max-width: 768px) {
      .pain-grid { grid-template-columns: 1fr; }
    }

    /* 解决方案 */
    .solution-row {
      display: flex;
      gap: 48px;
      align-items: center;
    }

    .solution-img {
      flex: 0 0 40%;
    }

    .solution-img img {
      border-radius: var(--radius-container);
      box-shadow: var(--shadow-card);
    }

    .solution-list {
      flex: 1;
    }

    .solution-item {
      position: relative;
      padding-left: 70px;
      margin-bottom: 40px;
    }

    .solution-num {
      position: absolute;
      left: 0;
      top: -10px;
      font-size: 48px;
      font-weight: 800;
      color: var(--color-gold);
      opacity: 0.15;
      line-height: 1;
    }

    @media (max-width: 768px) {
      .solution-row { flex-direction: column; }
      .solution-img { flex: 0 0 auto; width: 100%; }
    }

    /* 成果数据深色条 */
    .results-strip {
      background: var(--color-charcoal);
      color: #fff;
    }

    .results-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .result-item .number {
      font-size: 48px;
      font-weight: 800;
      color: var(--color-gold);
      display: block;
    }

    @media (max-width: 768px) {
      .results-grid { grid-template-columns: 1fr 1fr; }
    }

    /* 证言轮播 */
    .testimonial-carousel {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 20px 0;
      scroll-snap-type: x mandatory;
    }

    .testimonial-card {
      flex: 0 0 calc(33.333% - 16px);
      min-width: 280px;
      background: #fff;
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      position: relative;
    }

    .testimonial-card i {
      font-size: 48px;
      color: var(--color-gold);
      opacity: 0.2;
    }

    @media (max-width: 768px) {
      .testimonial-card { flex: 0 0 85%; }
    }

    /* FAQ */
    .faq-item {
      background: #fff;
      border-radius: 10px;
      margin-bottom: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 20px;
      display: none;
      color: #4a4a4a;
    }

    .faq-item.active .faq-answer { display: block; }

    /* CTA */
    .cta-strip {
      background: var(--color-gold);
      text-align: center;
    }

    .cta-btn {
      background: #fff;
      color: var(--color-gold);
      padding: 16px 48px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 18px;
      border: none;
    }

    .cta-btn:hover {
      background: var(--color-charcoal);
      color: #fff;
    }

    /* 页脚 */
    .footer {
      background: var(--color-charcoal);
      color: #A09992;
      padding: 60px 0 20px;
      border-top: 3px solid var(--color-gold);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }
    .copyright {
      text-align: center;
      font-size: 13px;
      border-top: 1px solid #3a3a3a;
      padding-top: 20px;
    }