/* roulang page: index */
:root {
      --primary-dark: #0A382C;
      --primary-deep: #031D16;
      --accent-green: #00E575;
      --accent-orange: #FF6B35;
      --accent-blue: #1E6BFF;
      --bg-light: #F8FAF9;
      --bg-white: #FFFFFF;
      --bg-dark-section: #062119;
      --text-main: #0F1E19;
      --text-muted: #556861;
      --border-color: #E2ECE7;
      --border-radius-lg: 22px;
      --border-radius-md: 14px;
      --shadow-subtle: 0 12px 32px rgba(10, 56, 44, 0.06);
      --shadow-hover: 0 20px 40px rgba(10, 56, 44, 0.12);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 顶部导航 */
    .site-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }

    .brand-logo {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-dark), var(--accent-green));
      color: #fff;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: 0 4px 12px rgba(0, 229, 117, 0.3);
    }

    .nav-link-custom {
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 16px;
      border-radius: 8px;
    }

    .nav-link-custom:hover, .nav-link-custom.active {
      color: var(--primary-dark);
      background: rgba(10, 56, 44, 0.05);
    }

    .btn-nav-action {
      background: linear-gradient(135deg, var(--primary-dark), #105947);
      color: #fff;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 9px 20px;
      border-radius: 50px;
      border: 1px solid rgba(0, 229, 117, 0.4);
      box-shadow: 0 4px 14px rgba(10, 56, 44, 0.2);
    }

    .btn-nav-action:hover {
      background: linear-gradient(135deg, #105947, var(--accent-green));
      color: #fff;
      transform: translateY(-1px);
    }

    /* 核心大卡片与徽章设计 */
    .custom-card {
      background: var(--bg-white);
      border-radius: var(--border-radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-subtle);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
    }

    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 229, 117, 0.5);
    }

    .pill-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      font-size: 0.82rem;
      font-weight: 700;
      border-radius: 30px;
      text-transform: uppercase;
    }

    .pill-badge-green {
      background: rgba(0, 229, 117, 0.12);
      color: #067c42;
      border: 1px solid rgba(0, 229, 117, 0.35);
    }

    .pill-badge-orange {
      background: rgba(255, 107, 53, 0.1);
      color: #d14917;
      border: 1px solid rgba(255, 107, 53, 0.3);
    }

    .pill-badge-blue {
      background: rgba(30, 107, 255, 0.1);
      color: #1555cb;
      border: 1px solid rgba(30, 107, 255, 0.3);
    }

    .pill-badge-dark {
      background: rgba(255, 255, 255, 0.1);
      color: var(--accent-green);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    /* 斜切色块首屏 (Hero Section) */
    .hero-angled {
      position: relative;
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-deep) 100%);
      color: #ffffff;
      padding: 90px 0 140px;
      overflow: hidden;
      clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    }

    .hero-angled::before {
      content: "";
      position: absolute;
      top: -20%;
      right: -10%;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(0, 229, 117, 0.15) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.8px;
      margin-bottom: 24px;
    }

    .hero-intro {
      font-size: 1.12rem;
      line-height: 1.8;
      color: #d0e2dc;
      margin-bottom: 34px;
      max-width: 820px;
    }

    .btn-hero-cta {
      background: var(--accent-green);
      color: var(--primary-deep);
      font-weight: 700;
      font-size: 1.05rem;
      padding: 15px 36px;
      border-radius: 50px;
      box-shadow: 0 8px 24px rgba(0, 229, 117, 0.35);
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-cta:hover {
      background: #00ff83;
      color: #000;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 229, 117, 0.5);
    }

    /* 板块通用间距与标题 */
    .section-spacing {
      padding: 85px 0;
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-lead {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 780px;
      margin-bottom: 48px;
    }

    /* 痛点警示卡 */
    .card-alert {
      border-left: 5px solid #ff4d4f;
      background: #ffffff;
      padding: 28px;
    }

    .card-alert .icon-box {
      width: 46px;
      height: 46px;
      background: rgba(255, 77, 79, 0.1);
      color: #ff4d4f;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 18px;
    }

    /* 排行榜单样式 */
    .rank-card {
      border: 1px solid var(--border-color);
      background: #ffffff;
      border-radius: var(--border-radius-lg);
      padding: 30px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-subtle);
    }

    .rank-badge {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 800;
      color: #fff;
    }

    .rank-1 { background: linear-gradient(135deg, #FFB800, #FF8A00); box-shadow: 0 4px 14px rgba(255, 138, 0, 0.35); }
    .rank-2 { background: linear-gradient(135deg, #A0AEC0, #718096); box-shadow: 0 4px 14px rgba(113, 128, 150, 0.35); }
    .rank-3 { background: linear-gradient(135deg, #DD6B20, #C05621); box-shadow: 0 4px 14px rgba(192, 86, 33, 0.35); }
    .rank-other { background: #E2ECE7; color: var(--primary-dark); }

    .metric-value {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.2;
    }

    .metric-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 步骤流程连接 */
    .step-node {
      background: #ffffff;
      border-radius: var(--border-radius-md);
      padding: 30px 24px;
      border: 1px solid var(--border-color);
      height: 100%;
      position: relative;
    }

    .step-number {
      font-size: 1.8rem;
      font-weight: 900;
      color: rgba(10, 56, 44, 0.15);
      margin-bottom: 12px;
      line-height: 1;
    }

    /* 深色数据大盘板块 */
    .bg-dark-analytics {
      background: linear-gradient(180deg, var(--bg-dark-section) 0%, #03140F 100%);
      color: #ffffff;
    }

    .stat-card-dark {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--border-radius-lg);
      padding: 34px 28px;
    }

    .stat-number-lg {
      font-size: 2.7rem;
      font-weight: 900;
      color: var(--accent-green);
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: 'DIN Alternate', Montserrat, sans-serif;
    }

    /* 对照表格/卡片 */
    .compare-card-pro {
      background: #ffffff;
      border: 2px solid var(--accent-green);
      border-radius: var(--border-radius-lg);
      padding: 32px;
      box-shadow: 0 16px 36px rgba(0, 229, 117, 0.12);
    }

    .compare-card-bad {
      background: #fffafa;
      border: 1px solid #ffd8d8;
      border-radius: var(--border-radius-lg);
      padding: 32px;
    }

    /* 手风琴 Accordion 覆写 */
    .accordion-item-custom {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px !important;
      margin-bottom: 14px;
      overflow: hidden;
    }

    .accordion-button-custom {
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--primary-dark);
      padding: 20px 24px;
      background: #ffffff;
      border: none;
      box-shadow: none !important;
    }

    .accordion-button-custom:not(.collapsed) {
      color: var(--primary-dark);
      background: rgba(0, 229, 117, 0.05);
    }

    .accordion-body-custom {
      padding: 0 24px 22px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 收口转化条 */
    .cta-banner-wrapper {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-deep) 100%);
      border-radius: 28px;
      padding: 60px 48px;
      color: #ffffff;
      border: 1px solid rgba(0, 229, 117, 0.3);
      box-shadow: 0 24px 48px rgba(3, 29, 22, 0.3);
    }

    /* 页脚 Footer */
    .site-footer {
      background: #031510;
      color: #8da39b;
      padding: 65px 0 35px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.9rem;
    }

    .site-footer h5 {
      color: #ffffff;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 20px;
    }

    .footer-links a {
      color: #8da39b;
      display: block;
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: var(--accent-green);
    }

    .footer-disclaimer {
      font-size: 0.8rem;
      line-height: 1.6;
      color: #617770;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      margin-top: 40px;
    }

    /* 响应式调整 */
    @media (max-width: 991px) {
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 1.8rem; }
      .hero-angled { clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%); padding: 60px 0 100px; }
      .cta-banner-wrapper { padding: 40px 24px; }
    }

    @media (max-width: 576px) {
      .hero-title { font-size: 1.85rem; }
      .stat-number-lg { font-size: 2.1rem; }
      .rank-card { padding: 20px; }
    }