/* roulang page: index */
:root {
      --primary-green: #2D5A27;
      --accent-gold: #C49A2B;
      --bg-warm: #F7F5F0;
      --deep-green: #1A3320;
      --card-white: #FFFFFF;
      --cta-red: #D44C2F;
      --text-dark: #2C2C2C;
      --text-muted: #6B6B6B;
      --border-light: #E5E0D8;
      --font-heading: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      --font-number: "DIN Alternate", "Arial", sans-serif;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-card: 0 2px 16px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.10);
      --container-max: 1280px;
      --section-gap: 120px;
      --mobile-gap: 80px;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
    }

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

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

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 0;
      transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s;
      background: transparent;
    }

    .navbar.scrolled {
      background: rgba(255, 255, 255, 0.97);
      box-shadow: 0 2px 20px rgba(0,0,0,0.08);
      padding: 10px 0;
    }

    .navbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .logo {
      font-family: var(--font-heading);
      font-size: 24px;
      font-weight: 700;
      color: #fff;
      transition: color 0.3s;
      letter-spacing: 1px;
    }

    .navbar.scrolled .logo {
      color: var(--primary-green);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-links a {
      padding: 8px 18px;
      border-radius: 40px;
      font-weight: 500;
      font-size: 15px;
      color: rgba(255,255,255,0.9);
      transition: all 0.25s;
    }

    .navbar.scrolled .nav-links a {
      color: var(--text-muted);
    }

    .nav-links a:hover {
      background: rgba(255,255,255,0.15);
      color: #fff;
    }

    .navbar.scrolled .nav-links a:hover {
      background: var(--primary-green);
      color: #fff;
    }

    .nav-cta {
      background: var(--cta-red);
      color: #fff !important;
      padding: 10px 24px !important;
      border-radius: 40px;
      font-weight: 600;
      margin-left: 12px;
    }

    .navbar.scrolled .nav-cta {
      background: var(--cta-red);
      color: #fff !important;
    }

    .hamburger {
      display: none;
      font-size: 24px;
      color: #fff;
      cursor: pointer;
      transition: color 0.3s;
    }

    .navbar.scrolled .hamburger {
      color: var(--primary-green);
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: rgba(255,255,255,0.98);
        padding: 20px;
        border-radius: 16px;
        margin-top: 16px;
        gap: 8px;
        box-shadow: 0 20px 30px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .navbar.scrolled .nav-links a,
      .nav-links a {
        color: var(--text-dark) !important;
      }
      .hamburger {
        display: block;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #1A3320 0%, #2D5A27 70%);
      position: relative;
      overflow: hidden;
      color: #fff;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }

    .hero .container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-tag {
      font-size: 14px;
      letter-spacing: 2px;
      color: var(--accent-gold);
      margin-bottom: 16px;
    }

    .hero h1 {
      font-family: var(--font-heading);
      font-size: 56px;
      font-weight: 700;
      line-height: 1.15;
      margin-bottom: 24px;
    }

    .hero h1 span {
      color: var(--accent-gold);
    }

    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--cta-red);
      color: #fff;
      padding: 14px 36px;
      border-radius: var(--radius-md);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-block;
    }

    .btn-primary:hover {
      background: #B33D26;
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }

    .btn-outline {
      border: 2px solid var(--primary-green);
      color: #fff;
      padding: 12px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: 0.25s;
    }

    .btn-outline:hover {
      background: var(--primary-green);
    }

    .hero-visual {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 40px;
    }

    @media (max-width: 768px) {
      .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero h1 {
        font-size: 36px;
      }
    }

    /* 通用板块 */
    section {
      padding: var(--section-gap) 0;
    }

    @media (max-width: 768px) {
      section {
        padding: var(--mobile-gap) 0;
      }
      .container {
        padding: 0 20px;
      }
    }

    .section-title {
      font-family: var(--font-heading);
      font-size: 42px;
      font-weight: 600;
      margin-bottom: 40px;
      color: var(--primary-green);
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .pain-quote {
      font-size: 72px;
      color: var(--accent-gold);
      opacity: 0.3;
      line-height: 1;
    }

    .pain-list {
      list-style: none;
    }

    .pain-list li {
      font-size: 20px;
      margin-bottom: 24px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .pain-dot {
      width: 8px;
      height: 8px;
      background: var(--cta-red);
      border-radius: 50%;
      margin-top: 12px;
    }

    .big-number {
      font-family: var(--font-number);
      font-size: 72px;
      font-weight: 700;
      color: var(--primary-green);
    }

    @media (max-width: 768px) {
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .big-number {
        font-size: 48px;
      }
    }

    /* 解决方案错层卡片 */
    .solutions-grid {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 30px;
      align-items: flex-start;
    }

    .solution-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
      width: 380px;
    }

    .solution-card:nth-child(2) {
      transform: translateY(-30px);
    }

    .solution-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-8px);
    }

    @media (max-width: 768px) {
      .solutions-grid {
        flex-direction: column;
      }
      .solution-card {
        width: 100%;
      }
      .solution-card:nth-child(2) {
        transform: none;
      }
    }

    .icon-circle {
      background: var(--primary-green);
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 24px;
      margin-bottom: 20px;
    }

    /* 成果区 */
    .results-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
    }

    .timeline-item {
      display: flex;
      gap: 20px;
      margin-bottom: 30px;
    }

    .timeline-dot {
      width: 12px;
      height: 12px;
      background: var(--accent-gold);
      border-radius: 50%;
      margin-top: 8px;
    }

    .data-row {
      display: flex;
      justify-content: space-between;
      text-align: center;
    }

    @media (max-width: 768px) {
      .results-grid {
        grid-template-columns: 1fr;
      }
      .data-row {
        flex-direction: column;
        gap: 20px;
      }
    }

    /* 证言 */
    .testimonial-card {
      background: #F9F7F3;
      border-left: 4px solid var(--primary-green);
      padding: 30px;
      border-radius: var(--radius-md);
      display: flex;
      gap: 20px;
    }

    .avatar {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: #ddd;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }

    .faq-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    .faq-answer {
      display: none;
      margin-top: 12px;
      color: var(--text-muted);
    }

    .faq-answer.open {
      display: block;
    }

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

    /* CTA 深色区 */
    .cta-dark {
      background: var(--deep-green);
      color: #fff;
    }

    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .cta-dark h2 {
      font-size: 42px;
    }

    .form-input {
      width: 100%;
      padding: 14px;
      margin-bottom: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      background: white;
    }

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

    /* 页脚 */
    footer {
      background: #fff;
      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;
      }
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      color: var(--text-muted);
      font-size: 14px;
    }