/* roulang page: index */
:root {
      --primary-green: #0A8F3C;
      --primary-dark: #08732E;
      --deep-green: #0A2E1A;
      --ink-green: #051B0E;
      --gold: #FFB800;
      --gold-dark: #E6A500;
      --soft-bg: #F4F9F5;
      --white: #FFFFFF;
      --text-main: #1e2b1c;
      --text-muted: #5a6b55;
      --text-light: #8a9b85;
      --border-soft: rgba(10, 143, 60, 0.1);
      --shadow-card: 0 4px 24px rgba(10, 143, 60, 0.08);
      --shadow-hover: 0 12px 32px rgba(10, 143, 60, 0.15);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-btn: 50px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Inter', sans-serif;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'Times New Roman', serif;
      --font-mono: 'DIN', 'Courier New', monospace;
      --max-width: 1280px;
      --nav-height: 72px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-sans);
      font-weight: 700;
    }

    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      letter-spacing: -0.2px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    p, li {
      font-size: 16px;
      line-height: 1.75;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 600;
      transition: all 0.25s ease;
      border: none;
      outline: none;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      z-index: 1000;
      display: flex;
      align-items: center;
      background: transparent;
      transition: background 0.3s, box-shadow 0.3s;
    }

    .nav.scrolled {
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    .nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: white;
      transition: color 0.3s;
    }
    .nav.scrolled .logo {
      color: var(--primary-green);
    }
    .logo i {
      font-size: 28px;
      color: var(--gold);
    }

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

    .nav-links a {
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      font-size: 16px;
      transition: color 0.2s;
    }
    .nav.scrolled .nav-links a {
      color: var(--text-main);
    }
    .nav-links a:hover {
      color: var(--gold);
    }

    .burger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .burger span {
      width: 25px;
      height: 2px;
      background: white;
      transition: 0.3s;
    }
    .nav.scrolled .burger span {
      background: var(--primary-green);
    }

    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 75%;
      max-width: 320px;
      height: 100vh;
      background: rgba(5,27,14,0.97);
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      padding: 32px 24px;
      transition: right 0.3s ease;
      z-index: 1001;
    }
    .mobile-menu.active {
      right: 0;
    }
    .mobile-menu a {
      color: white;
      font-size: 18px;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #0A2E1A 0%, #0A8F3C 100%);
      display: flex;
      align-items: center;
      padding-top: var(--nav-height);
      position: relative;
      overflow: hidden;
    }
    .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: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 1;
      color: white;
    }
    .hero-left h1 {
      font-size: 52px;
      margin-bottom: 20px;
    }
    .hero-left .sub {
      font-size: 20px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
    }
    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-green);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      box-shadow: 0 8px 18px rgba(10,143,60,0.3);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(10,143,60,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
    }
    .btn-outline:hover {
      background: var(--gold);
      color: var(--deep-green);
    }
    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero-right img {
      max-height: 480px;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.4));
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 i {
      color: var(--gold);
      margin-right: 12px;
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .highlight-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-soft);
      transition: all 0.25s;
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--gold);
    }
    .highlight-card i {
      font-size: 32px;
      color: var(--primary-green);
      margin-bottom: 16px;
    }

    /* 功能瀑布 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .feature-row.reverse {
      flex-direction: row-reverse;
    }
    .feature-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .feature-text {
      flex: 1;
      border-left: 4px solid var(--gold);
      padding-left: 24px;
    }

    /* 跑马灯数据 */
    .stats-band {
      background: var(--ink-green);
      color: white;
      padding: 60px 0;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
    }
    .stat-item .number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--gold);
    }

    /* 对比表 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .plan-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-soft);
    }
    .plan-card.pro {
      border: 2px solid var(--gold);
      box-shadow: 0 0 24px rgba(255,184,0,0.2);
    }

    /* FAQ */
    .faq-item {
      background: var(--soft-bg);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
    }
    .faq-question {
      padding: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      cursor: pointer;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--ink-green);
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    .btn-gold {
      background: var(--gold);
      color: var(--ink-green);
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 18px;
    }
    .btn-gold:hover {
      box-shadow: 0 0 28px rgba(255,184,0,0.5);
    }

    /* 页脚 */
    .footer {
      background: #051B0E;
      color: #b0c7b0;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 40px; }
      .hero .container { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .burger { display: flex; }
      .highlights-grid, .pricing-grid { grid-template-columns: 1fr; }
      .feature-row { flex-direction: column; }
      .stats-grid { flex-direction: column; gap: 32px; }
    }