/* roulang page: index */
:root {
      --primary-deep-green: #0A3D35;
      --accent-gold: #D4AF37;
      --bg-warm-white: #F8F6F2;
      --text-charcoal: #1E1E1E;
      --text-muted: #5F6B6A;
      --cta-red: #C0392B;
      --white: #ffffff;
      --border-light: #E8E5DF;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.03);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.06);
      --shadow-hover: 0 18px 36px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 8px;
      --transition: 0.3s ease;
      --font-sans: -apple-system, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      --font-mono: "SF Mono", "Cascadia Code", "Menlo", monospace;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm-white);
      color: var(--text-charcoal);
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      overflow-x: hidden;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部信息条 */
    .top-bar {
      background: var(--primary-deep-green);
      color: var(--accent-gold);
      font-size: 12px;
      font-weight: 500;
      padding: 8px 0;
      letter-spacing: 0.5px;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }
    .top-bar .domain-tag {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .top-bar .domain-tag i {
      font-size: 14px;
    }
    .top-bar .action-links a {
      color: var(--accent-gold);
      margin-left: 24px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .top-bar .action-links a:hover {
      color: var(--white);
    }

    /* 主导航 Sticky */
    .main-header {
      background: var(--white);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 0 transparent;
      transition: box-shadow 0.3s;
    }
    .main-header.scrolled {
      box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }
    .logo-area {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .logo-text {
      font-size: 28px;
      font-weight: 700;
      color: var(--primary-deep-green);
      letter-spacing: -0.5px;
      line-height: 1;
    }
    .logo-text span {
      color: var(--accent-gold);
    }
    .logo-domain {
      font-size: 12px;
      color: var(--text-muted);
      margin-left: 6px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-charcoal);
      font-size: 15px;
      padding-bottom: 8px;
      border-bottom: 3px solid transparent;
      transition: 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-deep-green);
      border-bottom-color: var(--accent-gold);
    }
    .nav-cta {
      background: var(--cta-red);
      color: white !important;
      padding: 10px 20px !important;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border-bottom: none !important;
      box-shadow: 0 4px 10px rgba(192,57,43,0.3);
      margin-left: 8px;
    }
    .nav-cta:hover {
      background: #a93226;
      color: white !important;
    }
    .mobile-toggle {
      display: none;
      font-size: 24px;
      color: var(--primary-deep-green);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-charcoal);
      position: relative;
    }
    .section-title::before {
      content: '';
      display: block;
      width: 48px;
      height: 3px;
      background: var(--accent-gold);
      margin-bottom: 18px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 18px;
      max-width: 700px;
      margin-bottom: 48px;
    }

    /* Hero */
    #home {
      padding: 80px 0 100px;
      background: var(--bg-warm-white);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-text {
      animation: fadeInLeft 0.8s ease;
    }
    .hero-text h1 {
      font-size: 52px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep-green);
      margin-bottom: 24px;
    }
    .hero-text .subtitle {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: var(--primary-deep-green);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      border: none;
      transition: 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 6px 18px rgba(212,175,55,0.2);
    }
    .btn-primary:hover {
      background: #c5a12a;
      transform: translateY(-2px);
    }
    .btn-ghost {
      border: 1.5px solid var(--primary-deep-green);
      background: transparent;
      color: var(--primary-deep-green);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-ghost:hover {
      background: var(--primary-deep-green);
      color: white;
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 32px;
      height: 400px;
      position: relative;
      animation: fadeInRight 0.8s ease;
      box-shadow: var(--shadow-md);
    }
    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(10,61,53,0.08);
      border-radius: 32px;
    }
    @keyframes fadeInLeft {
      from { opacity: 0; transform: translateX(-30px); }
      to { opacity: 1; transform: translateX(0); }
    }
    @keyframes fadeInRight {
      from { opacity: 0; transform: translateX(30px); }
      to { opacity: 1; transform: translateX(0); }
    }

    /* 数据带 */
    #stats {
      background: var(--primary-deep-green);
      padding: 70px 0;
      color: white;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-number {
      font-size: 44px;
      font-weight: 700;
      font-family: var(--font-mono);
      color: var(--accent-gold);
    }
    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 16px;
    }

    /* 服务体系 错落布局 */
    #services .service-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: stretch;
    }
    .service-left-image {
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      min-height: 360px;
    }
    .service-cards-stack {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .service-card {
      background: white;
      padding: 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      background: rgba(10,61,53,0.08);
      color: var(--accent-gold);
      font-size: 24px;
      padding: 12px;
      border-radius: 12px;
    }

    /* 策略方案 图文交替 */
    .solution-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 80px;
    }
    .solution-img {
      background: #e0dbd0;
      border-radius: 24px;
      height: 300px;
      background-size: cover;
      background-position: center;
    }
    .reverse {
      direction: rtl;
    }
    .reverse .solution-content {
      direction: ltr;
    }

    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .case-content {
      padding: 20px;
    }
    .tag {
      background: rgba(10,61,53,0.1);
      color: var(--primary-deep-green);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
    }

    /* FAQ */
    .faq-accordion .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      background: transparent;
      padding: 20px 0;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 17px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: #f4f2ec;
      border-radius: 0 0 8px 8px;
      padding: 0 20px;
    }
    .faq-answer.open {
      max-height: 200px;
      padding: 16px 20px;
    }

    /* CTA */
    #contact {
      background: var(--primary-deep-green);
      color: white;
      padding: 80px 0;
    }
    .cta-form input {
      background: rgba(255,255,255,0.1);
      border: none;
      border-bottom: 2px solid rgba(255,255,255,0.5);
      color: white;
      padding: 12px;
      margin-bottom: 20px;
      width: 100%;
    }
    .cta-form input:focus {
      outline: none;
      border-bottom-color: var(--accent-gold);
    }
    .btn-red-full {
      background: var(--cta-red);
      color: white;
      padding: 14px;
      width: 100%;
      border: none;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: 0.2s;
    }
    .btn-red-full:hover {
      background: #b33126;
    }

    footer {
      background: #0b2c28;
      color: #ccc;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 32px;
    }

    @media (max-width: 1024px) {
      .hero-grid, .solution-row, .service-layout {
        grid-template-columns: 1fr;
      }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .cases-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .hero-text h1 { font-size: 34px; }
      .stats-grid { grid-template-columns: 1fr; }
    }