/* roulang page: index */
:root {
      --primary: #0B3B2F;
      --primary-dark: #0A2E25;
      --accent: #D4A843;
      --accent-hover: #C49A3A;
      --bg: #FAF9F6;
      --bg-light: #F0EDE8;
      --white: #FFFFFF;
      --text: #1E1E1E;
      --text-muted: #555;
      --text-light: #FFFFFF;
      --border: #E0E0E0;
      --radius: 12px;
      --shadow: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --transition: 0.25s ease;
      --sidebar-width: 240px;
      --header-height: 56px;
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 1rem;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

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

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

    button, .button {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-weight: 600;
      transition: var(--transition);
      border-radius: 30px;
      padding: 0.8rem 2rem;
      font-size: 1rem;
    }

    h1, h2, h3 {
      font-weight: 600;
      letter-spacing: -0.3px;
      margin-bottom: 1rem;
    }

    h1 { font-size: 2.8rem; font-weight: 700; letter-spacing: -0.5px; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.4rem; }

    .container-main {
      display: flex;
      flex: 1;
    }

    /* 左侧导航 - App Shell */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background: var(--primary);
      color: var(--text-light);
      display: flex;
      flex-direction: column;
      padding: 1.8rem 0;
      z-index: 20;
      box-shadow: 2px 0 15px rgba(0,0,0,0.08);
    }

    .sidebar-logo {
      padding: 0 1.5rem 1.5rem;
      font-size: 1.4rem;
      font-weight: 700;
      border-bottom: 1px solid rgba(255,255,255,0.15);
      margin-bottom: 1.5rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .sidebar-logo i {
      color: var(--accent);
      font-size: 1.6rem;
    }

    .sidebar nav {
      flex: 1;
      display: flex;
      flex-direction: column;
      padding: 0 0.8rem;
    }

    .sidebar nav a {
      color: rgba(255,255,255,0.85);
      padding: 0.8rem 1.2rem;
      border-radius: 8px;
      margin-bottom: 0.2rem;
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 0.6rem;
      transition: var(--transition);
    }

    .sidebar nav a i {
      width: 20px;
      text-align: center;
      color: var(--accent);
      opacity: 0.7;
    }

    .sidebar nav a:hover {
      background: rgba(255,255,255,0.1);
      color: white;
    }

    .sidebar nav a.active {
      background: rgba(255,255,255,0.15);
      color: white;
      border-left: 3px solid var(--accent);
      padding-left: calc(1.2rem - 3px);
    }

    .sidebar-contact {
      padding: 1.5rem 1.5rem 0;
      font-size: 0.8rem;
      color: rgba(255,255,255,0.6);
      border-top: 1px solid rgba(255,255,255,0.15);
      margin-top: 1rem;
    }

    .main-content {
      margin-left: var(--sidebar-width);
      flex: 1;
      width: calc(100% - var(--sidebar-width));
      background: var(--bg);
    }

    /* 移动端导航 */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: var(--primary);
      color: white;
      align-items: center;
      justify-content: space-between;
      padding: 0 1.2rem;
      z-index: 25;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .mobile-logo {
      font-weight: 700;
      font-size: 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .mobile-logo i { color: var(--accent); }

    .hamburger {
      font-size: 1.5rem;
      background: none;
      border: none;
      color: white;
      cursor: pointer;
    }

    .mobile-drawer {
      position: fixed;
      top: 0;
      left: -100%;
      width: 80%;
      max-width: 300px;
      height: 100vh;
      background: var(--primary);
      z-index: 30;
      transition: left 0.3s ease;
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
    }

    .mobile-drawer.open {
      left: 0;
    }

    .drawer-close {
      align-self: flex-end;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    .drawer-nav {
      margin-top: 2rem;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }

    .drawer-nav a {
      color: rgba(255,255,255,0.9);
      font-size: 1.1rem;
      padding: 0.6rem 0;
      border-bottom: 1px solid rgba(255,255,255,0.2);
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
    .drawer-nav a i { color: var(--accent); }

    /* 通用区块 */
    section {
      padding: 5rem 2.5rem;
    }

    .section-title {
      margin-bottom: 2.5rem;
    }
    .section-title h2 {
      color: var(--primary);
      margin-bottom: 0.5rem;
    }
    .section-title p {
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    .bg-white { background: var(--white); }
    .bg-light { background: var(--bg-light); }
    .bg-dark { background: var(--primary); color: white; }
    .bg-accent { background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%); color: var(--primary); }

    /* 卡片 */
    .card {
      background: var(--white);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 2rem;
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }

    /* 按钮 */
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      font-weight: 600;
      border-radius: 30px;
      padding: 0.8rem 2rem;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
      color: var(--primary);
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      border-radius: 30px;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .btn-light {
      background: white;
      color: var(--primary);
      font-weight: 600;
    }
    .btn-light:hover {
      background: #f0f0f0;
      transform: scale(1.03);
    }

    /* Hero */
    .hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 70vh;
      display: flex;
      align-items: center;
      color: white;
      padding-left: 3rem;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(11,59,47,0.75);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 650px;
    }

    /* 痛点不对称布局 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }
    .pain-card {
      background: white;
      border-radius: var(--radius);
      padding: 2rem;
      box-shadow: var(--shadow);
      border-left: 4px solid var(--primary);
      transition: var(--transition);
    }
    .pain-card:hover { box-shadow: var(--shadow-hover); }
    .pain-card i { color: var(--accent); font-size: 2rem; margin-bottom: 1rem; }

    /* 解决方案水平卡片 */
    .solution-row {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .solution-item {
      display: flex;
      align-items: center;
      gap: 2rem;
      background: white;
      border-radius: var(--radius);
      padding: 2rem;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }
    .solution-item:hover { box-shadow: var(--shadow-hover); }
    .solution-icon {
      width: 70px;
      height: 70px;
      background: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 成果数字 */
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 证言 */
    .testimonial-block {
      background: var(--primary-dark);
      border-radius: var(--radius);
      padding: 2.5rem;
      color: white;
    }
    .testimonial-quote {
      font-size: 1.3rem;
      font-style: italic;
      margin-bottom: 1.5rem;
    }

    /* FAQ手风琴 */
    .accordion-title {
      font-size: 1.1rem;
      font-weight: 600;
      border-bottom: 1px solid var(--border);
      padding: 1rem 0;
    }

    /* 页脚 */
    .footer {
      background: var(--primary);
      color: #ccc;
      padding: 3rem 2.5rem;
    }

    @media (max-width: 1024px) {
      .sidebar { display: none; }
      .main-content { margin-left: 0; width: 100%; }
      .mobile-header { display: flex; }
      section { padding: 3rem 1.5rem; }
      h1 { font-size: 2.2rem; }
      h2 { font-size: 1.8rem; }
      .pain-grid { grid-template-columns: 1fr; }
      .solution-item { flex-direction: column; text-align: center; }
      .stats-grid { flex-wrap: wrap; gap: 2rem; }
      .hero { padding-left: 1.5rem; min-height: 60vh; }
    }