/* roulang page: index */
:root {
      --bg-base: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-card: #FFFFFF;
      --bg-dark: #0B0F17;
      --bg-dark-card: #131A26;
      --color-primary: #1E3A8A;
      --color-primary-hover: #172554;
      --color-accent: #0EA5E9;
      --color-accent-sub: #0284C7;
      --color-emerald: #10B981;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --border-light: rgba(15, 23, 42, 0.08);
      --border-dark: rgba(255, 255, 255, 0.1);
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 35px -10px rgba(14, 165, 233, 0.15);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Reset & Base */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.68;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 顶部导航 Header */
    .site-header {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 0;
      z-index: 1020;
      backdrop-filter: blur(8px);
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--color-primary);
      letter-spacing: -0.02em;
    }
    .brand-logo .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      color: #fff;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }
    .nav-link {
      font-size: 0.93rem;
      font-weight: 500;
      color: #334155 !important;
      padding: 0.6rem 0.85rem !important;
      border-radius: var(--radius-sm);
      transition: var(--transition-smooth);
    }
    .nav-link:hover, .nav-link:focus {
      color: var(--color-accent) !important;
      background-color: rgba(14, 165, 233, 0.06);
    }
    .nav-search-box {
      position: relative;
      min-width: 200px;
    }
    .nav-search-box input {
      height: 38px;
      border-radius: var(--radius-pill);
      padding-left: 36px;
      font-size: 0.85rem;
      background-color: #F1F5F9;
      border: 1px solid transparent;
      transition: var(--transition-smooth);
    }
    .nav-search-box input:focus {
      background-color: #FFFFFF;
      border-color: var(--color-accent);
      box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
      outline: none;
    }
    .nav-search-box i {
      position: absolute;
      left: 14px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    .btn-header-cta {
      background: var(--color-primary);
      color: #FFFFFF !important;
      font-size: 0.88rem;
      font-weight: 600;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-pill);
      border: 1px solid var(--color-primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition-smooth);
    }
    .btn-header-cta:hover {
      background: var(--color-accent);
      border-color: var(--color-accent);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(14, 165, 233, 0.25);
    }

    /* 按钮通用体系 */
    .btn-brand-primary {
      background-color: var(--color-primary);
      color: #FFFFFF;
      font-weight: 600;
      padding: 0.75rem 1.6rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition-smooth);
    }
    .btn-brand-primary:hover {
      background-color: var(--color-primary-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(30, 58, 138, 0.25);
    }
    .btn-brand-accent {
      background-color: var(--color-accent);
      color: #FFFFFF;
      font-weight: 600;
      padding: 0.75rem 1.6rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition-smooth);
    }
    .btn-brand-accent:hover {
      background-color: var(--color-accent-sub);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .btn-brand-outline {
      background-color: transparent;
      color: var(--text-main);
      font-weight: 600;
      padding: 0.75rem 1.6rem;
      border-radius: var(--radius-md);
      border: 1px solid rgba(15, 23, 42, 0.2);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition-smooth);
    }
    .btn-brand-outline:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
      background-color: rgba(14, 165, 233, 0.05);
      transform: translateY(-2px);
    }

    /* 板块结构基底 */
    .section-wrap {
      padding: 5.5rem 0;
      position: relative;
    }
    .section-wrap-sm {
      padding: 3.5rem 0;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-title-wrap {
      margin-bottom: 3.5rem;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--color-accent);
      background-color: rgba(14, 165, 233, 0.1);
      padding: 0.35rem 0.85rem;
      border-radius: var(--radius-pill);
      margin-bottom: 0.85rem;
    }
    .section-badge-dark {
      color: #38BDF8;
      background-color: rgba(56, 189, 248, 0.15);
      border: 1px solid rgba(56, 189, 248, 0.25);
    }
    .section-h2 {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 0.9rem;
    }
    .section-dark .section-h2 {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 极简卡片通用 */
    .vg-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      height: 100%;
      padding: 2rem;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .vg-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(14, 165, 233, 0.3);
    }
    .vg-card-dark {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      color: var(--text-light);
    }
    .vg-card-dark:hover {
      border-color: rgba(56, 189, 248, 0.4);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    }

    /* 1. Hero 蓝图：众筹预热 / 阶段目标进度与档位 */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(30, 58, 138, 0.05) 0%, transparent 60%),
                  #F8FAFC;
      padding: 4.5rem 0 5rem;
      border-bottom: 1px solid var(--border-light);
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.03em;
      color: #0F172A;
      margin-bottom: 1.2rem;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro {
      font-size: 1.08rem;
      color: #475569;
      line-height: 1.75;
      margin-bottom: 2rem;
    }
    .hero-crowd-card {
      background: #FFFFFF;
      border: 1px solid rgba(15, 23, 42, 0.1);
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .progress-circle-wrap {
      width: 140px;
      height: 140px;
      margin: 0 auto 1.5rem;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .circle-progress-svg {
      transform: rotate(-90deg);
      width: 100%;
      height: 100%;
    }
    .circle-progress-svg circle {
      fill: none;
      stroke-width: 10;
      stroke-linecap: round;
    }
    .circle-progress-bg {
      stroke: #E2E8F0;
    }
    .circle-progress-bar {
      stroke: var(--color-accent);
      stroke-dasharray: 377;
      stroke-dashoffset: 67; /* 约 82% */
      transition: stroke-dashoffset 1s ease-in-out;
    }
    .progress-inner-stat {
      position: absolute;
      text-align: center;
    }
    .progress-inner-stat .num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1;
    }
    .progress-inner-stat .txt {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 600;
      margin-top: 4px;
    }
    .crowd-tier-item {
      background: #F8FAFC;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 0.85rem 1.1rem;
      margin-bottom: 0.75rem;
      cursor: pointer;
      transition: var(--transition-smooth);
    }
    .crowd-tier-item.active, .crowd-tier-item:hover {
      background: #EFF6FF;
      border-color: var(--color-accent);
      transform: translateX(4px);
    }

    /* 2. 倒计时与里程碑阶段 */
    .countdown-card {
      background: linear-gradient(135deg, #1E293B, #0F172A);
      color: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 2.2rem;
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: var(--shadow-md);
    }
    .countdown-digit-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 8px;
      padding: 0.75rem 1rem;
      min-width: 72px;
      text-align: center;
    }
    .countdown-digit {
      font-size: 2rem;
      font-weight: 800;
      line-height: 1;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      color: #38BDF8;
    }
    .countdown-lbl {
      font-size: 0.72rem;
      color: #94A3B8;
      margin-top: 5px;
      text-transform: uppercase;
    }

    /* 3. 活动亮点墙 */
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(14, 165, 233, 0.1);
      color: var(--color-accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 1.25rem;
    }

    /* 4. 权益与保障阶梯 */
    .tier-badge {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.65rem;
      border-radius: var(--radius-pill);
      background: #E0F2FE;
      color: #0369A1;
      display: inline-block;
      margin-bottom: 0.75rem;
    }
    .tier-price-big {
      font-size: 2rem;
      font-weight: 800;
      color: var(--color-primary);
    }

    /* 5. 流程步骤 Steps */
    .step-num-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--color-primary);
      color: #FFFFFF;
      font-weight: 800;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      margin-bottom: 1.2rem;
      box-shadow: 0 4px 10px rgba(30, 58, 138, 0.2);
    }

    /* 6. 奖励与成果预览 */
    .reward-asset-img {
      height: 220px;
      width: 100%;
      object-fit: cover;
      border-radius: var(--radius-md);
      margin-bottom: 1.2rem;
      border: 1px solid var(--border-light);
    }

    /* 7. 效能统计条 Metrics */
    .metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      letter-spacing: -0.03em;
    }
    .metric-unit {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--color-accent);
    }

    /* 8. 解决方案矩阵 & 对比选型表 */
    .matrix-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
    }
    .matrix-table th, .matrix-table td {
      padding: 1.1rem 1.4rem;
      vertical-align: middle;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.93rem;
    }
    .matrix-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--text-main);
    }
    .matrix-table tr.highlight-row td {
      background: rgba(14, 165, 233, 0.04);
      font-weight: 600;
    }
    .table-check-ok {
      color: var(--color-emerald);
      font-weight: 700;
    }
    .table-check-no {
      color: #94A3B8;
    }

    /* 9. 口碑与评价墙 */
    .testimonial-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      object-fit: cover;
      border: 2px solid #E2E8F0;
    }

    /* 10. 合作伙伴徽标墙 */
    .partner-logo-box {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      text-align: center;
      filter: grayscale(100%);
      opacity: 0.75;
      transition: var(--transition-smooth);
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.05rem;
      color: #475569;
    }
    .partner-logo-box:hover {
      filter: grayscale(0%);
      opacity: 1;
      border-color: var(--color-accent);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* 11. FAQ 手风琴 */
    .accordion-item {
      background-color: #FFFFFF;
      border: 1px solid var(--border-light) !important;
      border-radius: var(--radius-md) !important;
      margin-bottom: 0.9rem;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      padding: 1.25rem 1.5rem;
      background: #FFFFFF;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: var(--color-accent);
      background-color: #F8FAFC;
    }
    .accordion-body {
      font-size: 0.93rem;
      color: #475569;
      line-height: 1.75;
      padding: 1.25rem 1.5rem;
      background: #FFFFFF;
    }

    /* 12. 转化预约表单与行动收口 */
    .cta-container-card {
      background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: var(--shadow-hover);
    }
    .cta-input {
      height: 48px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      color: #FFFFFF;
      padding: 0 1rem;
      font-size: 0.93rem;
      transition: var(--transition-smooth);
    }
    .cta-input:focus {
      background: rgba(255, 255, 255, 0.15);
      border-color: var(--color-accent);
      box-shadow: none;
      color: #FFFFFF;
      outline: none;
    }
    .cta-input::placeholder {
      color: #94A3B8;
    }

    /* 页脚 Footer */
    .site-footer {
      background: #090D14;
      color: #94A3B8;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 4.5rem 0 2.5rem;
      font-size: 0.88rem;
    }
    .site-footer a {
      color: #94A3B8;
    }
    .site-footer a:hover {
      color: var(--color-accent);
    }
    .footer-heading {
      color: #FFFFFF;
      font-size: 0.98rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      letter-spacing: -0.01em;
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      margin-top: 3.5rem;
      padding-top: 2rem;
      font-size: 0.82rem;
    }

    /* 响应式调整 */
    @media (max-width: 991.98px) {
      .hero-h1 {
        font-size: 2.2rem;
      }
      .section-h2 {
        font-size: 1.85rem;
      }
      .cta-container-card {
        padding: 2.2rem 1.5rem;
      }
      .nav-search-box {
        margin: 1rem 0;
        width: 100%;
      }
    }
    @media (max-width: 575.98px) {
      .hero-h1 {
        font-size: 1.8rem;
      }
      .section-wrap {
        padding: 3.8rem 0;
      }
      .btn-brand-primary, .btn-brand-accent, .btn-brand-outline {
        width: 100%;
      }
    }