/* roulang page: index */
:root {
      --bg-primary: #080C16;
      --bg-secondary: #0E1524;
      --bg-emphasis: #13203A;
      --brand-main: #00B4FF;
      --brand-gradient-light: #00B4FF;
      --brand-gradient-dark: #4C6FFF;
      --brand-accent: #2DE3A6;
      --brand-warning: #FF5C7A;
      --text-primary: #E9EFF7;
      --text-secondary: #9FB0C8;
      --text-muted: #5D7188;
      --border-glass: rgba(255,255,255,0.10);
      --border-strong: rgba(0,180,255,0.30);
      --r-sm: 10px;
      --r-md: 14px;
      --r-lg: 20px;
      --r-pill: 999px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
      --shadow-glow: 0 0 20px rgba(0,180,255,0.30);
      --section-space: 96px;
      --header-h: 72px;
      --container-w: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      color: var(--brand-main);
      text-decoration: none;
      transition: color .25s ease;
    }

    a:hover {
      color: #66d4ff;
    }

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      max-width: var(--container-w);
    }

    section {
      position: relative;
      padding: var(--section-space) 0;
    }

    .section {
      position: relative;
      padding: var(--section-space) 0;
    }

    .section-head {
      margin-bottom: 48px;
    }

    .section-head.text-center .section-tag {
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      background: rgba(0,180,255,0.12);
      color: var(--brand-main);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 16px;
      border-radius: var(--r-pill);
      letter-spacing: .05em;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-primary);
      letter-spacing: .01em;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 640px;
    }

    .section-head.text-center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      color: var(--text-primary);
    }

    /* ---------- 按钮 ---------- */
    .btn {
      border-radius: var(--r-sm);
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      border: 0;
      transition: all .3s cubic-bezier(.22,.61,.36,1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      cursor: pointer;
      text-decoration: none;
      line-height: 1.4;
    }

    .btn:focus-visible {
      outline: 3px solid rgba(0,180,255,0.5);
      outline-offset: 2px;
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-glow {
      background: linear-gradient(135deg, var(--brand-gradient-light), var(--brand-gradient-dark));
      color: #fff;
      box-shadow: 0 0 20px rgba(0,180,255,0.30);
      border: none;
    }

    .btn-glow:hover {
      color: #fff;
      box-shadow: 0 0 28px rgba(0,180,255,0.45);
      transform: translateY(-1px);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.35);
      color: var(--text-primary);
    }

    .btn-ghost:hover {
      border-color: var(--brand-main);
      color: var(--brand-main);
    }

    .btn-sm {
      padding: 9px 20px;
      font-size: 14px;
    }

    .btn-lg {
      padding: 15px 38px;
      font-size: 17px;
      border-radius: 14px;
    }

    /* ---------- 头像/导航 ---------- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      width: 100%;
      height: var(--header-h);
      z-index: 1040;
      background: rgba(8,12,22,0.35);
      backdrop-filter: blur(0);
      -webkit-backdrop-filter: blur(0);
      transition: background .35s ease, backdrop-filter .35s ease, box-shadow .35s ease;
    }

    .site-header.scrolled {
      background: rgba(8,12,22,0.82);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 4px 30px rgba(0,0,0,0.35);
    }

    .site-header .navbar {
      padding: 0;
      min-height: var(--header-h);
    }

    .navbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0;
      margin: 0;
    }

    .brand-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0,180,255,0.2), rgba(76,111,255,0.1));
      border: 1px solid rgba(0,180,255,0.4);
      color: var(--brand-main);
      font-size: 16px;
      font-weight: 800;
      letter-spacing: .02em;
      box-shadow: 0 0 14px rgba(0,180,255,0.2);
      position: relative;
      text-transform: lowercase;
    }

    .brand-badge::after {
      content: '';
      position: absolute;
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: var(--brand-accent);
      right: -2px;
      top: -2px;
      box-shadow: 0 0 6px rgba(45,227,166,0.8);
    }

    .brand-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: .02em;
      white-space: nowrap;
    }

    .site-header .navbar-nav {
      gap: 6px;
    }

    .site-header .nav-link {
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 500;
      padding: 10px 16px !important;
      border-radius: var(--r-sm);
      transition: color .25s ease, background .25s ease;
      position: relative;
    }

    .site-header .nav-link:hover {
      color: var(--text-primary);
      background: rgba(255,255,255,0.04);
    }

    .site-header .nav-link.active {
      color: var(--brand-main);
    }

    .site-header .nav-link.active::after {
      content: '';
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 2px;
      height: 2px;
      background: var(--brand-main);
      border-radius: 2px;
      box-shadow: 0 0 10px rgba(0,180,255,0.6);
    }

    .nav-actions {
      gap: 16px;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--r-pill);
      padding: 4px 14px;
      white-space: nowrap;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--brand-accent);
      border-radius: 50%;
      box-shadow: 0 0 8px rgba(45,227,166,0.8);
      animation: pulse-dot 1.8s infinite;
    }

    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(0.8); }
    }

    .navbar-toggler {
      border: 1px solid rgba(255,255,255,0.15);
      background: rgba(255,255,255,0.03);
      border-radius: 10px;
      padding: 8px 10px;
      width: 44px;
      height: 44px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 3px rgba(0,180,255,0.25);
    }

    .toggler-bar {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--text-primary);
      border-radius: 2px;
      transition: all .3s ease;
    }

    .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(1) {
      transform: rotate(45deg) translateY(6px);
    }

    .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(2) {
      opacity: 0;
    }

    .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(3) {
      transform: rotate(-45deg) translateY(-6px);
    }

    @media (max-width: 991.98px) {
      .navbar-collapse {
        background: rgba(10,15,28,0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: 16px;
        margin-top: 12px;
        padding: 16px 20px;
        box-shadow: 0 20px 50px rgba(0,0,0,0.4);
      }
      .site-header .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        font-size: 16px;
      }
      .nav-actions {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        margin-top: 6px;
        padding-top: 12px;
        border-top: 1px solid rgba(255,255,255,0.06);
      }
    }

    /* ---------- Hero ---------- */
    .hero-section {
      position: relative;
      min-height: 560px;
      padding: calc(var(--header-h) + 70px) 0 110px;
      background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
      background-color: var(--bg-primary);
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(2,6,18,0.82) 0%, rgba(8,12,22,0.92) 100%);
      z-index: 0;
    }

    .hero-section .container {
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-block;
      background: rgba(0,180,255,0.14);
      border: 1px solid rgba(0,180,255,0.3);
      color: var(--brand-main);
      font-size: 13px;
      font-weight: 500;
      padding: 5px 16px;
      border-radius: var(--r-pill);
      letter-spacing: .04em;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.18;
      margin-bottom: 16px;
      color: var(--text-primary);
      max-width: 620px;
      letter-spacing: .01em;
    }

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 460px;
      margin-bottom: 30px;
    }

    .hero-actions {
      gap: 14px;
    }

    .hero-trust {
      gap: 20px;
    }

    .tiny-note {
      font-size: 13px;
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .tiny-note i {
      color: var(--brand-accent);
      font-size: 14px;
    }

    /* Hero 右侧指标卡 */
    .hero-metric-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .glass-card {
      background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
      border: 1px solid rgba(255,255,255,0.10);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-radius: var(--r-md);
      box-shadow: var(--shadow-card);
      transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
    }

    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0,180,255,0.25);
      box-shadow: 0 12px 40px rgba(0,0,0,0.35);
    }

    .metric-card {
      padding: 20px 18px;
      min-height: 118px;
    }

    .metric-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: rgba(0,180,255,0.12);
      color: var(--brand-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      margin-bottom: 10px;
    }

    .metric-value {
      font-size: 26px;
      font-weight: 800;
      color: var(--brand-accent);
      line-height: 1.2;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-secondary);
      margin-top: 2px;
    }

    /* ---------- 指标看板 ---------- */
    .stat-dashboard {
      position: relative;
      padding: 0 0 var(--section-space);
      margin-top: -50px;
      z-index: 5;
    }

    .stat-dashboard .container {
      position: relative;
      z-index: 2;
    }

    .stat-grid {
      background: linear-gradient(135deg, rgba(30,45,80,0.7), rgba(14,21,36,0.9));
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--r-lg);
      padding: 28px 10px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      box-shadow: 0 18px 50px rgba(0,0,0,0.45);
      backdrop-filter: blur(12px);
    }

    .stat-item {
      text-align: center;
      padding: 10px 12px;
      position: relative;
    }

    .stat-item:not(:last-child)::after {
      content: '';
      position: absolute;
      right: 0;
      top: 20%;
      bottom: 20%;
      width: 1px;
      background: rgba(255,255,255,0.08);
    }

    .stat-num {
      font-size: 36px;
      font-weight: 800;
      color: var(--brand-accent);
      line-height: 1.1;
      font-variant-numeric: tabular-nums;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-secondary);
      margin-top: 6px;
    }

    .stat-data-note {
      display: block;
      text-align: right;
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 10px;
      padding-right: 4px;
    }

    /* ---------- 服务矩阵 ---------- */
    .service-section {
      background: var(--bg-secondary);
      border-top: 1px solid rgba(255,255,255,0.04);
    }

    .service-card {
      height: 100%;
      padding: 26px 24px;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .service-card.service-lg {
      flex-direction: row;
      gap: 20px;
      align-items: flex-start;
      padding: 28px 26px;
    }

    .service-card.service-lg .service-icon {
      width: 56px;
      height: 56px;
      flex-shrink: 0;
    }

    .service-icon {
      width: 52px;
      height: 52px;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(0,180,255,0.16), rgba(76,111,255,0.06));
      border: 1px solid rgba(0,180,255,0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-main);
      font-size: 20px;
      margin-bottom: 16px;
      box-shadow: 0 0 16px rgba(0,180,255,0.1);
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 14px;
      flex-grow: 1;
    }

    .link-more {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--brand-main);
      position: relative;
      padding-bottom: 2px;
      transition: gap .3s ease;
    }

    .link-more::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 1px;
      background: var(--brand-main);
      transform: scaleX(0.4);
      transform-origin: left;
      transition: transform .3s ease;
      opacity: 0.6;
    }

    .service-card:hover .link-more {
      gap: 10px;
    }

    .service-card:hover .link-more::after {
      transform: scaleX(1);
      opacity: 1;
    }

    .service-banner {
      padding: 26px 30px;
      background: linear-gradient(135deg, rgba(0,180,255,0.12), rgba(20,50,80,0.25));
      border: 1px solid rgba(0,180,255,0.2);
    }

    .service-banner h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 4px;
    }

    .service-banner p {
      margin-bottom: 0;
      color: var(--text-secondary);
      font-size: 15px;
    }

    /* ---------- 结果对比 ---------- */
    .compare-section {
      background: var(--bg-primary);
    }

    .compare-wrap {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 20px;
      align-items: center;
      position: relative;
    }

    .compare-card {
      padding: 34px 30px;
      border-radius: var(--r-lg);
    }

    .compare-card h3 {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .compare-card.traditional {
      background: rgba(20,26,40,0.85);
      border-color: rgba(255,255,255,0.06);
    }

    .compare-card.traditional h3 i {
      color: var(--brand-warning);
    }

    .compare-card.premium {
      background: linear-gradient(135deg, rgba(0,180,255,0.10), rgba(20,40,70,0.25));
      border-color: rgba(0,180,255,0.25);
    }

    .compare-card.premium h3 i {
      color: var(--brand-accent);
    }

    .compare-list {
      list-style: none;
      padding: 0;
      margin: 0 0 22px;
    }

    .compare-list li {
      padding: 10px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      font-size: 15px;
      color: var(--text-primary);
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.5;
    }

    .compare-list li:last-child {
      border-bottom: none;
    }

    .compare-list li i {
      font-size: 15px;
      margin-top: 4px;
      width: 14px;
      text-align: center;
    }

    .compare-list li .fa-times {
      color: var(--brand-warning);
    }

    .compare-list li .fa-check {
      color: var(--brand-accent);
    }

    .vs-badge {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 800;
      color: var(--brand-main);
      background: rgba(8,12,22,0.9);
      border: 2px solid rgba(0,180,255,0.5);
      box-shadow: 0 0 24px rgba(0,180,255,0.25);
      letter-spacing: .08em;
      z-index: 2;
    }

    @media (max-width: 767.98px) {
      .compare-wrap {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .vs-badge {
        margin: 0 auto;
      }
    }

    /* ---------- 资讯/列表 ---------- */
    .news-section {
      background: var(--bg-secondary);
    }

    .news-card {
      padding: 0;
      overflow: hidden;
      display: block;
      height: 100%;
      color: inherit;
      cursor: pointer;
      text-decoration: none !important;
    }

    a.news-card-link {
      display: block;
      height: 100%;
      color: inherit;
      text-decoration: none;
    }

    .news-thumb {
      height: 170px;
      overflow: hidden;
      background: var(--bg-emphasis);
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .45s ease;
    }

    .news-card:hover .news-thumb img {
      transform: scale(1.04);
    }

    .news-body {
      padding: 20px 20px 16px;
    }

    .news-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      margin-bottom: 12px;
    }

    .badge-pill {
      display: inline-block;
      background: rgba(0,180,255,0.12);
      color: var(--brand-main);
      font-size: 12px;
      font-weight: 500;
      padding: 4px 12px;
      border-radius: var(--r-pill);
    }

    .news-date {
      font-size: 13px;
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 5px;
      white-space: nowrap;
    }

    .news-body h3 {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      min-height: 50px;
      transition: color .25s ease;
    }

    .news-card:hover .news-body h3 {
      color: var(--brand-main);
    }

    .news-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 12px;
    }

    .news-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .news-more {
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-main);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      opacity: 0.85;
      transition: opacity .25s ease;
    }

    .news-card:hover .news-more {
      opacity: 1;
    }

    .empty-state {
      text-align: center;
      padding: 60px 30px;
      color: var(--text-secondary);
      font-size: 16px;
    }

    .empty-state i {
      font-size: 34px;
      color: var(--text-muted);
      display: block;
      margin-bottom: 12px;
    }

    /* ---------- FAQ ---------- */
    .faq-section {
      background: var(--bg-primary);
    }

    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.07);
      border-radius: var(--r-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color .3s ease, background .3s ease;
    }

    .faq-item:hover {
      border-color: rgba(0,180,255,0.2);
    }

    .faq-item.active {
      border-color: rgba(0,180,255,0.3);
      background: rgba(0,180,255,0.04);
    }

    .faq-toggle {
      display: flex;
      align-items: center;
      gap: 14px;
      width: 100%;
      background: transparent;
      border: none;
      color: var(--text-primary);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 20px;
      text-align: left;
      cursor: pointer;
      transition: color .25s ease;
    }

    .faq-toggle:hover {
      color: var(--brand-main);
    }

    .faq-toggle:focus-visible {
      outline: 2px solid rgba(0,180,255,0.5);
      outline-offset: -2px;
      border-radius: var(--r-md);
    }

    .q-mark {
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      border-radius: 8px;
      background: rgba(0,180,255,0.14);
      color: var(--brand-main);
      font-size: 13px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .faq-icon {
      margin-left: auto;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.2);
      color: var(--text-secondary);
      font-size: 14px;
      flex-shrink: 0;
      transition: transform .3s ease, background .3s ease, color .3s ease;
      position: relative;
    }

    .faq-icon::before {
      content: '+';
      position: absolute;
      transition: transform .3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: rgba(0,180,255,0.15);
      border-color: rgba(0,180,255,0.3);
      color: var(--brand-main);
    }

    .faq-body {
      padding: 0 20px 20px 62px;
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.7;
    }

    /* ---------- 转化表单 ---------- */
    .convert-section {
      position: relative;
      padding: 110px 0;
      background: url('/assets/images/coverpic/cover-1.png') center / cover no-repeat;
    }

    .convert-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(2,6,18,0.86);
      z-index: 1;
    }

    .convert-section .container {
      position: relative;
      z-index: 2;
    }

    .form-card {
      max-width: 560px;
      margin: 0 auto;
      padding: 32px 32px 28px;
    }

    .form-card h2 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 6px;
      text-align: center;
    }

    .form-sub {
      text-align: center;
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 26px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
      margin-bottom: 6px;
    }

    .form-control,
    .form-select {
      width: 100%;
      height: 46px;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.10);
      border-radius: var(--r-sm);
      color: var(--text-primary);
      font-size: 14px;
      padding: 0 14px;
      transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
    }

    .form-control::placeholder {
      color: var(--text-muted);
    }

    .form-control:focus,
    .form-select:focus {
      background: rgba(255,255,255,0.09);
      border-color: var(--brand-main);
      box-shadow: 0 0 0 4px rgba(0,180,255,0.15);
      color: var(--text-primary);
      outline: none;
    }

    textarea.form-control {
      height: auto;
      padding-top: 10px;
      resize: vertical;
    }

    .form-select {
      appearance: none;
      -webkit-appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239FB0C8' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 14px center;
      padding-right: 36px;
    }

    .form-select option {
      background: var(--bg-secondary);
      color: var(--text-primary);
    }

    .form-submit {
      width: 100%;
      height: 48px;
      font-size: 15px;
      margin-top: 6px;
    }

    /* ---------- 页脚 ---------- */
    .site-footer {
      background: #050810;
      border-top: 1px solid rgba(255,255,255,0.04);
      padding: 64px 0 20px;
    }

    .footer-brand .navbar-brand {
      margin-bottom: 12px;
    }

    .footer-about {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 280px;
      margin-bottom: 14px;
    }

    .footer-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 28px;
      height: 2px;
      background: var(--brand-main);
      border-radius: 2px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: var(--text-secondary);
      font-size: 14px;
      transition: color .25s ease, padding-left .25s ease;
      text-decoration: none;
    }

    .footer-links a:hover {
      color: var(--brand-main);
      padding-left: 4px;
    }

    .footer-contact-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 14px;
      color: var(--text-secondary);
    }

    .footer-contact-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }

    .footer-contact-list i {
      color: var(--brand-main);
      margin-top: 4px;
      width: 14px;
      text-align: center;
    }

    .footer-bottom {
      margin-top: 48px;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,0.04);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    .copyright {
      font-size: 13px;
      color: var(--text-muted);
    }

    .footer-mini-links {
      display: flex;
      gap: 20px;
    }

    .footer-mini-links a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
    }

    .footer-mini-links a:hover {
      color: var(--brand-main);
    }

    /* ---------- 响应式 ---------- */
    @media (max-width: 991.98px) {
      :root {
        --section-space: 72px;
      }
      .hero-title {
        font-size: 36px;
      }
      .stat-grid {
        grid-template-columns: 2fr 2fr;
      }
      .stat-item:nth-child(2)::after {
        display: none;
      }
      .stat-item:nth-child(-n+2) {
        margin-bottom: 12px;
      }
    }

    @media (max-width: 767.98px) {
      :root {
        --section-space: 60px;
      }
      .hero-section {
        padding-bottom: 80px;
      }
      .hero-title {
        font-size: 28px;
        line-height: 1.3;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .section-title {
        font-size: 26px;
      }
      .stat-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stat-item:nth-child(2)::after {
        display: none;
      }
      .stat-item:nth-child(-n+2) {
        margin-bottom: 10px;
      }
      .stat-num {
        font-size: 28px;
      }
      .service-card.service-lg {
        flex-direction: column;
        align-items: flex-start;
      }
      .form-card {
        padding: 24px 20px;
      }
      .compare-card {
        padding: 24px 20px;
      }
    }

    @media (max-width: 575.98px) {
      .hero-title {
        font-size: 27px;
      }
      .hero-metric-grid {
        gap: 12px;
      }
      .metric-card {
        padding: 16px 14px;
        min-height: 104px;
      }
      .metric-value {
        font-size: 22px;
      }
      .metric-label {
        font-size: 12px;
      }
      .footer-bottom {
        flex-direction: column;
        justify-content: center;
        text-align: center;
      }
      .copyright {
        text-align: center;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
    }

    /* 隐藏无障碍辅助文字 */
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      overflow: hidden;
      clip: rect(0,0,0,0);
      white-space: nowrap;
      border: 0;
    }

    /* 滚动条微调 */
    ::-webkit-scrollbar {
      width: 10px;
      background: var(--bg-primary);
    }

    ::-webkit-scrollbar-thumb {
      background: rgba(0,180,255,0.25);
      border-radius: 20px;
      border: 2px solid var(--bg-primary);
    }

    ::-webkit-scrollbar-thumb:hover {
      background: rgba(0,180,255,0.4);
    }

/* roulang page: category1 */
:root {
            --bg-deep: #080C16;
            --bg-dark: #0E1524;
            --bg-panel: #13203A;
            --brand: #00B4FF;
            --brand-2: #4C6FFF;
            --accent: #2DE3A6;
            --danger: #FF5C7A;
            --text-main: #E9EFF7;
            --text-secondary: #9FB0C8;
            --text-muted: #5D7188;
            --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            --glass-border: 1px solid rgba(255, 255, 255, 0.10);
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
            --section-space: 96px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--brand);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: #5AC8FF;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: 72px;
            transition: background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
            background: transparent;
        }
        .site-header.scrolled {
            background: rgba(8, 12, 22, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-header .navbar {
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            font-size: 0;
        }
        .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            letter-spacing: 0.5px;
            box-shadow: 0 0 18px rgba(0, 180, 255, 0.45);
        }
        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 1px;
        }
        .navbar-nav {
            gap: 4px;
        }
        .nav-item {
            margin: 0 2px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary) !important;
            padding: 10px 18px !important;
            border-radius: 8px;
            position: relative;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover {
            color: var(--text-main) !important;
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link.active {
            color: var(--brand) !important;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 180, 255, 0.6);
        }
        .nav-actions {
            gap: 14px;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 6px 14px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(45, 227, 166, 0.8);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(0.85);
            }
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 0 20px rgba(0, 180, 255, 0.30);
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-glow:hover {
            color: #fff;
            box-shadow: 0 0 28px rgba(0, 180, 255, 0.5);
            transform: translateY(-2px);
            background: linear-gradient(135deg, #1BC3FF, #5A7BFF);
        }
        .btn-glow:active,
        .btn-glow.active {
            transform: scale(0.98);
        }
        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: var(--text-main);
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            font-weight: 500;
            font-size: 14px;
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-ghost:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(0, 180, 255, 0.08);
        }
        .btn-ghost:active {
            transform: scale(0.98);
        }
        .custom-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            padding: 8px 10px;
            background: transparent;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .custom-toggler .toggler-bar {
            width: 18px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all .3s ease;
        }
        .custom-toggler:hover .toggler-bar {
            background: var(--brand);
        }
        .page-hero {
            position: relative;
            min-height: 280px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0 60px;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(2, 6, 18, 0.88), rgba(8, 12, 22, 0.94));
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: 1px;
            margin: 0 0 16px;
            max-width: 680px;
        }
        .page-hero .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.8;
            margin: 0 0 10px;
        }
        .page-hero .hero-tags {
            margin-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 6px 14px;
            border-radius: 999px;
        }
        .hero-tag i {
            color: var(--brand);
            font-size: 12px;
        }
        .section {
            padding: var(--section-space) 0;
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 12px;
            background: rgba(0, 180, 255, 0.1);
            border: 1px solid rgba(0, 180, 255, 0.15);
            padding: 5px 14px;
            border-radius: 999px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .section-lead {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 40px;
        }
        .glass-card {
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 180, 255, 0.25);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 180, 255, 0.08);
        }
        .benefit-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--brand);
            background: rgba(0, 180, 255, 0.12);
            border: 1px solid rgba(0, 180, 255, 0.2);
            margin-bottom: 18px;
        }
        .benefit-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .benefit-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .flow-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .flow-step {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }
        .flow-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 16px rgba(0, 180, 255, 0.4);
            margin-bottom: 16px;
        }
        .flow-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .flow-arrow {
            position: absolute;
            top: 50%;
            right: -8px;
            transform: translateY(-50%);
            color: rgba(0, 180, 255, 0.4);
            font-size: 16px;
            z-index: 2;
        }
        .content-card {
            overflow: hidden;
            padding: 0;
            background: var(--glass-bg);
        }
        .content-card .card-cover {
            height: 170px;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .content-card .card-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(8, 12, 22, 0.3));
        }
        .content-card .card-body {
            padding: 22px 24px 24px;
        }
        .content-card .card-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand);
            background: rgba(0, 180, 255, 0.12);
            border: 1px solid rgba(0, 180, 255, 0.15);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .content-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .content-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .card-link {
            font-size: 14px;
            color: var(--brand);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            position: relative;
        }
        .content-card .card-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 1px;
            background: var(--brand);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s ease;
        }
        .content-card .card-link:hover::after {
            transform: scaleX(1);
        }
        .faq-section {
            background: var(--bg-dark);
        }
        .faq-item {
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .3s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 180, 255, 0.25);
        }
        .faq-item .faq-q {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 14px;
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background .25s ease;
        }
        .faq-item .faq-q:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-q-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(0, 180, 255, 0.12);
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
        }
        .faq-q-arrow {
            margin-left: auto;
            color: var(--text-muted);
            font-size: 14px;
            transition: transform .3s ease;
        }
        .faq-item .faq-a {
            padding: 0 24px 20px 66px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .cta-section {
            position: relative;
            background-image: url('/assets/images/coverpic/cover-8.webp');
            background-size: cover;
            background-position: center;
            padding: 90px 0;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(2, 6, 18, 0.85);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-card {
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: 18px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 48px 40px;
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.35);
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }
        .cta-card h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .site-footer {
            background: #050810;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 70px 0 0;
        }
        .footer-brand {
            margin-bottom: 18px;
        }
        .footer-about {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
            margin-top: 14px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color .25s ease, padding-left .25s ease;
        }
        .footer-links a:hover {
            color: var(--brand);
            padding-left: 4px;
        }
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact-list li {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact-list i {
            color: var(--brand);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 24px 0;
            margin-top: 50px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .copyright {
            font-size: 13px;
            color: var(--text-muted);
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: var(--bg-dark);
                border: 1px solid rgba(255, 255, 255, 0.08);
                border-radius: 14px;
                padding: 18px;
                margin-top: 12px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
            }
            .navbar-nav {
                gap: 0;
                margin-bottom: 14px;
            }
            .nav-link {
                padding: 12px 16px !important;
                border-radius: 8px;
            }
            .nav-link.active::after {
                left: 16px;
                right: auto;
                width: 24px;
                bottom: 8px;
            }
            .nav-actions {
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                padding-top: 14px;
                justify-content: space-between;
                flex-wrap: wrap;
            }
        }
        @media (max-width: 767px) {
            :root {
                --section-space: 64px;
            }
            .page-hero {
                min-height: 240px;
                padding: 100px 0 44px;
            }
            .page-hero h1 {
                font-size: 28px;
                line-height: 1.35;
            }
            .section-title {
                font-size: 26px;
            }
            .flow-arrow {
                display: none;
            }
            .cta-card {
                padding: 36px 24px;
            }
            .cta-card h2 {
                font-size: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .hero-tag {
                font-size: 12px;
                padding: 5px 10px;
            }
            .btn-glow,
            .btn-ghost {
                width: 100%;
                justify-content: center;
            }
            .status-badge {
                font-size: 12px;
                padding: 5px 10px;
            }
        }

/* roulang page: article */
:root {
      --bg-deep: #080C16;
      --bg-secondary: #0E1524;
      --bg-block: #13203A;
      --brand: #00B4FF;
      --brand-end: #4C6FFF;
      --accent: #2DE3A6;
      --danger: #FF5C7A;
      --text-main: #E9EFF7;
      --text-secondary: #9FB0C8;
      --text-weak: #5D7188;
      --border-glass: rgba(255, 255, 255, 0.10);
      --border-brand: rgba(0, 180, 255, 0.25);
      --radius-sm: 10px;
      --radius-md: 14px;
      --radius-pill: 999px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
      --shadow-glow: 0 0 20px rgba(0, 180, 255, 0.30);
      --space-section: 90px;
      --space-section-mobile: 60px;
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-main);
      background: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--brand);
      text-decoration: none;
      transition: color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }
    a:hover {
      color: #66CDFF;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    .container {
      max-width: 1200px;
    }
    .glass-card {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
      border: 1px solid var(--border-glass);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
    }
    .btn {
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00B4FF, #4C6FFF);
      border: none;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 20px rgba(0, 180, 255, 0.30);
      color: #fff;
      font-weight: 600;
      padding: 10px 26px;
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 28px rgba(0, 180, 255, 0.50);
      transform: translateY(-2px);
      color: #fff;
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.6);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-weight: 600;
      padding: 10px 26px;
      transition: all 0.3s ease;
    }
    .btn-ghost:hover {
      border-color: var(--brand);
      color: var(--brand);
      box-shadow: 0 0 16px rgba(0, 180, 255, 0.20);
      transform: translateY(-2px);
    }
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 72px;
      z-index: 1000;
      background: transparent;
      transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
      border-bottom: 1px solid transparent;
    }
    .site-header.scrolled {
      background: rgba(8, 12, 22, 0.85);
      -webkit-backdrop-filter: blur(12px);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.30);
    }
    .navbar {
      padding-top: 0;
      padding-bottom: 0;
      min-height: 72px;
    }
    .navbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0;
    }
    .brand-badge {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, #00B4FF, #4C6FFF);
      color: #fff;
      font-size: 15px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 18px rgba(0, 180, 255, 0.35);
      letter-spacing: 0.5px;
    }
    .brand-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 1px;
    }
    .navbar-nav {
      gap: 2px;
    }
    .nav-link {
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 500;
      padding: 8px 16px !important;
      border-radius: var(--radius-pill);
      position: relative;
      transition: color 0.3s ease, background 0.3s ease;
    }
    .nav-link:hover {
      color: var(--text-main);
    }
    .nav-link.active {
      color: var(--brand);
      background: rgba(0, 180, 255, 0.10);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 18px;
      height: 3px;
      border-radius: var(--radius-pill);
      background: var(--brand);
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(45, 227, 166, 0.10);
      border: 1px solid rgba(45, 227, 166, 0.20);
      border-radius: var(--radius-pill);
      padding: 6px 14px;
      font-size: 12px;
      color: var(--accent);
      font-weight: 500;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 8px var(--accent);
      animation: pulseDot 2s infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.5; }
    }
    .custom-toggler {
      border: none;
      background: transparent;
      width: 40px;
      height: 40px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      padding: 0;
    }
    .custom-toggler:focus {
      box-shadow: none;
      outline: none;
    }
    .toggler-bar {
      width: 22px;
      height: 2px;
      background: var(--text-main);
      border-radius: 2px;
      transition: all 0.3s ease;
    }
    .article-hero {
      padding: 150px 0 50px;
      position: relative;
      background: url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat;
    }
    .article-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(2, 6, 18, 0.88), rgba(8, 12, 22, 0.96));
      z-index: 1;
    }
    .article-hero .container {
      position: relative;
      z-index: 2;
    }
    .breadcrumb-nav {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 28px;
      font-size: 14px;
      color: var(--text-secondary);
    }
    .breadcrumb-nav a {
      color: var(--text-secondary);
      border-bottom: 1px solid transparent;
      transition: color 0.3s ease, border-color 0.3s ease;
    }
    .breadcrumb-nav a:hover {
      color: var(--brand);
      border-bottom-color: var(--brand);
    }
    .separator {
      color: var(--text-weak);
      font-size: 12px;
    }
    .crumb-current {
      color: var(--text-main);
      font-weight: 500;
      max-width: 420px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .article-title {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
      color: #fff;
    }
    .article-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      font-size: 14px;
      color: var(--text-secondary);
    }
    .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }
    .meta-item i {
      color: var(--brand);
      font-size: 14px;
    }
    .article-body-wrap {
      padding: 50px 0 80px;
    }
    .article-content {
      max-width: 820px;
      margin: 0 auto;
      padding: 48px 56px;
      border-radius: 18px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015));
      border: 1px solid rgba(255, 255, 255, 0.08);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
    }
    .article-content {
      font-size: 16px;
      line-height: 1.8;
      letter-spacing: 0.02em;
      color: var(--text-main);
      word-wrap: break-word;
    }
    .article-content p {
      margin-bottom: 1.5em;
    }
    .article-content h1,
    .article-content h2,
    .article-content h3,
    .article-content h4 {
      font-weight: 700;
      color: #fff;
      margin-top: 40px;
      margin-bottom: 16px;
      line-height: 1.4;
    }
    .article-content h2 {
      font-size: 24px;
    }
    .article-content h3 {
      font-size: 20px;
    }
    .article-content a {
      color: var(--brand);
      border-bottom: 1px solid rgba(0, 180, 255, 0.3);
      transition: border-color 0.3s ease, color 0.3s ease;
    }
    .article-content a:hover {
      color: #66CDFF;
      border-bottom-color: #66CDFF;
    }
    .article-content ul,
    .article-content ol {
      margin-bottom: 1.5em;
      padding-left: 1.6em;
    }
    .article-content li {
      margin-bottom: 0.5em;
    }
    .article-content blockquote {
      border-left: 4px solid var(--brand);
      background: rgba(0, 180, 255, 0.06);
      padding: 18px 24px;
      border-radius: 0 12px 12px 0;
      margin: 1.8em 0;
      color: var(--text-secondary);
      font-style: normal;
    }
    .article-content blockquote p {
      margin-bottom: 0;
    }
    .article-content img {
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.30);
      margin: 1.5em 0;
    }
    .article-content code {
      background: rgba(0, 180, 255, 0.10);
      border-radius: 6px;
      padding: 2px 8px;
      font-size: 0.9em;
      color: #66CDFF;
    }
    .article-content pre {
      background: #0a1020;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 20px;
      overflow-x: auto;
      margin: 1.5em 0;
    }
    .article-content pre code {
      background: transparent;
      padding: 0;
      color: #E9EFF7;
    }
    .article-content table {
      width: 100%;
      margin: 1.5em 0;
      border-collapse: collapse;
      font-size: 14px;
    }
    .article-content th,
    .article-content td {
      border: 1px solid rgba(255, 255, 255, 0.10);
      padding: 10px 14px;
      text-align: left;
    }
    .article-content th {
      background: rgba(0, 180, 255, 0.08);
      font-weight: 600;
      color: #fff;
    }
    .article-content hr {
      border: none;
      border-top: 1px solid rgba(255, 255, 255, 0.10);
      margin: 2em 0;
    }
    .article-not-found {
      text-align: center;
      padding: 80px 20px;
    }
    .article-not-found i {
      font-size: 48px;
      color: var(--brand);
      opacity: 0.6;
      margin-bottom: 20px;
    }
    .article-not-found p {
      font-size: 16px;
      color: var(--text-secondary);
      margin-bottom: 28px;
    }
    .related-posts {
      padding: 90px 0;
      background: var(--bg-deep);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-header h2 {
      font-size: 30px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 8px;
    }
    .section-header p {
      color: var(--text-secondary);
      font-size: 15px;
    }
    .post-card {
      display: block;
      border-radius: var(--radius-md);
      overflow: hidden;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.08);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
      color: var(--text-main);
    }
    .post-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-brand);
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
      color: var(--text-main);
    }
    .post-card-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }
    .post-card-body {
      padding: 24px;
    }
    .post-card-tag {
      display: inline-block;
      background: rgba(0, 180, 255, 0.12);
      color: var(--brand);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
    }
    .post-card-title {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .post-card-excerpt {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 14px;
    }
    .post-card-date {
      font-size: 13px;
      color: var(--text-weak);
    }
    .return-btn-wrap {
      margin-top: 48px;
      text-align: center;
    }
    .article-cta {
      padding: 80px 0;
      background: url('/assets/images/coverpic/cover-1.png') center / cover no-repeat;
      position: relative;
    }
    .article-cta::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(2, 6, 18, 0.82);
    }
    .cta-card {
      position: relative;
      z-index: 2;
      max-width: 640px;
      margin: 0 auto;
      text-align: center;
      padding: 56px 48px;
      border-radius: 18px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
      border: 1px solid var(--border-glass);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
    }
    .cta-card h2 {
      font-size: 28px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }
    .cta-card p {
      color: var(--text-secondary);
      margin-bottom: 30px;
      font-size: 15px;
    }
    .site-footer {
      background: #050810;
      padding: 70px 0 0;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }
    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 18px;
    }
    .footer-brand .navbar-brand {
      padding: 0;
    }
    .footer-about {
      color: var(--text-secondary);
      font-size: 14px;
      line-height: 1.7;
      margin-top: 14px;
      max-width: 360px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a {
      color: var(--text-secondary);
      font-size: 14px;
      transition: color 0.3s ease;
    }
    .footer-links a:hover {
      color: var(--brand);
    }
    .footer-contact-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-contact-list li {
      color: var(--text-secondary);
      font-size: 14px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-contact-list i {
      color: var(--brand);
      width: 18px;
      text-align: center;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 22px 0;
      margin-top: 50px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .copyright {
      color: var(--text-weak);
      font-size: 13px;
    }
    @media (max-width: 991.98px) {
      .navbar-collapse {
        background: rgba(8, 12, 22, 0.95);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-radius: 16px;
        padding: 20px;
        margin-top: 12px;
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: var(--shadow-card);
      }
      .navbar-nav {
        gap: 4px;
        margin-bottom: 16px;
      }
      .nav-link {
        font-size: 16px;
        padding: 12px 16px !important;
      }
      .nav-actions {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
      }
      .nav-actions .status-badge {
        justify-content: center;
      }
      .nav-actions .btn {
        width: 100%;
        text-align: center;
      }
    }
    @media (max-width: 767.98px) {
      .article-hero {
        padding: 110px 0 36px;
      }
      .article-title {
        font-size: 28px;
      }
      .article-meta {
        gap: 12px;
        font-size: 13px;
      }
      .article-content {
        padding: 28px 22px;
        border-radius: 14px;
      }
      .article-content {
        font-size: 15px;
      }
      .related-posts {
        padding: 60px 0;
      }
      .section-header h2 {
        font-size: 24px;
      }
      .article-cta {
        padding: 56px 0;
      }
      .cta-card {
        padding: 36px 24px;
      }
      .cta-card h2 {
        font-size: 22px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }
    @media (max-width: 520px) {
      .breadcrumb-nav {
        font-size: 12px;
      }
      .crumb-current {
        max-width: 180px;
      }
      .article-title {
        font-size: 24px;
      }
      .meta-item {
        gap: 5px;
      }
      .article-meta {
        gap: 10px;
        font-size: 12px;
      }
      .article-content {
        padding: 22px 16px;
      }
      .article-content h2 {
        font-size: 20px;
      }
      .section-header p {
        font-size: 13px;
      }
      .post-card-body {
        padding: 18px;
      }
    }

/* roulang page: category2 */
:root {
  --bg-deep: #080C16;
  --bg-dark: #0E1524;
  --bg-mid: #13203A;
  --brand: #00B4FF;
  --brand-2: #4C6FFF;
  --accent: #2DE3A6;
  --danger: #FF5C7A;
  --text-main: #E9EFF7;
  --text-sub: #9FB0C8;
  --text-dim: #5D7188;
  --glass-border: 1px solid rgba(255,255,255,0.10);
  --glass-bg: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --section-space: 96px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: all .3s ease;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
input, textarea, select {
  font-family: inherit;
}
.container {
  max-width: 1200px;
}
:focus-visible {
  outline: 2px solid rgba(0, 180, 255, 0.6);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1050;
  min-height: 72px;
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .4s, box-shadow .4s, border-color .4s;
}
.site-header.scrolled {
  background: rgba(8, 12, 22, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.navbar {
  min-height: 72px;
  padding: 12px 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin: 0;
}
.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #00B4FF, #4C6FFF);
  border-radius: 10px;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
  box-shadow: 0 0 18px rgba(0, 180, 255, 0.35);
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: .04em;
  white-space: nowrap;
}
.navbar-nav {
  gap: 8px;
}
.nav-link {
  color: var(--text-sub) !important;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 16px !important;
  border-radius: 8px;
  position: relative;
  transition: all .3s;
}
.nav-link:hover {
  color: var(--text-main) !important;
  background: rgba(255, 255, 255, 0.04);
}
.nav-link.active {
  color: var(--brand) !important;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), transparent);
}
.nav-actions {
  gap: 12px;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
  background: rgba(45, 227, 166, 0.08);
  border: 1px solid rgba(45, 227, 166, 0.15);
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(45, 227, 166, 0.8);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.custom-toggler {
  border: none;
  background: transparent;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.toggler-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s;
}

/* ===== 按钮 ===== */
.btn-glow {
  background: linear-gradient(135deg, #00B4FF, #4C6FFF);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 0 20px rgba(0, 180, 255, 0.30);
  transition: all .3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-glow:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(0, 180, 255, 0.45);
}
.btn-glow:active {
  transform: scale(0.98);
}
.btn-ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-weight: 600;
  font-size: 15px;
  transition: all .3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(0, 180, 255, 0.06);
}
.btn-ghost:active {
  transform: scale(0.98);
}

/* ===== 通用区块 ===== */
.section-head {
  margin-bottom: 48px;
}
.section-badge {
  display: inline-block;
  background: rgba(0, 180, 255, 0.12);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0, 180, 255, 0.2);
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  margin: 12px 0 8px;
  line-height: 1.3;
}
.section-sub {
  color: var(--text-sub);
  font-size: 15px;
  margin-bottom: 0;
}

/* ===== 页面小 Hero ===== */
.page-hero {
  position: relative;
  min-height: 360px;
  padding: 140px 0 72px;
  background: linear-gradient(180deg, rgba(2, 6, 18, 0.86) 20%, rgba(8, 12, 22, 0.95) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: 8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0, 180, 255, 0.16), transparent 70%);
  pointer-events: none;
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.breadcrumb-nav a {
  color: var(--text-sub);
}
.breadcrumb-nav a:hover {
  color: var(--brand);
}
.breadcrumb-nav span:last-child {
  color: var(--text-dim);
}
.hero-title {
  font-size: 40px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.hero-sub {
  color: var(--text-sub);
  font-size: 17px;
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 28px;
  position: relative;
  z-index: 2;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  position: relative;
  z-index: 2;
}

/* ===== 学习路径 ===== */
.steps-section {
  padding: 72px 0 64px;
  background: var(--bg-deep);
}
.step-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform .3s, border-color .3s, box-shadow .3s;
  height: 100%;
  position: relative;
}
.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 180, 255, 0.25);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.step-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--brand);
  line-height: 1;
  display: block;
  margin-bottom: 14px;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-card p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== 教程卡片 ===== */
.tutorial-section {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-dark) 50%, var(--bg-deep) 100%);
}
.tutorial-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.tutorial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 180, 255, 0.25);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.card-cover {
  position: relative;
  height: 190px;
  overflow: hidden;
}
.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.tutorial-card:hover .card-cover img {
  transform: scale(1.04);
}
.card-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(8, 12, 22, 0.72));
}
.card-label {
  position: absolute;
  left: 16px;
  top: 16px;
  z-index: 2;
  display: inline-block;
  background: rgba(0, 180, 255, 0.15);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(0, 180, 255, 0.2);
}
.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.5;
}
.card-body p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 14px;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-dim);
  font-size: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 12px;
}
.read-link {
  color: var(--brand);
  font-weight: 500;
}
.read-link i {
  transition: transform .3s;
}
.read-link:hover {
  color: var(--brand);
}
.read-link:hover i {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--section-space) 0;
  background: var(--bg-deep);
}
.faq-item {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}
.faq-item:hover {
  border-color: rgba(0, 180, 255, 0.2);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 22px;
  text-align: left;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 600;
  background: transparent;
  transition: background .3s;
}
.faq-question:hover {
  background: rgba(255, 255, 255, 0.03);
}
.faq-q {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 180, 255, 0.12);
  color: var(--brand);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}
.faq-text {
  flex: 1;
  line-height: 1.5;
}
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: var(--text-sub);
  font-size: 18px;
  line-height: 1;
  transition: transform .3s, color .3s, border-color .3s;
}
.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  color: var(--brand);
  border-color: var(--brand);
}
.faq-body {
  padding: 0 22px 20px 62px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(rgba(2, 6, 18, 0.86), rgba(2, 6, 18, 0.86)), url('/assets/images/coverpic/cover-8.webp') center center / cover no-repeat;
  text-align: center;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 10px;
}
.cta-inner p {
  color: var(--text-sub);
  font-size: 16px;
  margin-bottom: 30px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #050810;
  padding: 64px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.footer-brand {
  margin-bottom: 10px;
}
.footer-brand .navbar-brand {
  margin-bottom: 14px;
}
.footer-about {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
  max-width: 380px;
  margin: 12px 0 0;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-sub);
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--brand);
}
.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-contact-list li {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-contact-list li i {
  color: var(--brand);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.footer-bottom {
  margin-top: 40px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.copyright {
  color: var(--text-dim);
  font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .site-header {
    min-height: 72px;
  }
  .navbar-collapse {
    margin-top: 12px;
    background: rgba(8, 12, 22, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  }
  .navbar-nav {
    gap: 4px;
    margin-bottom: 12px;
  }
  .nav-link {
    padding: 12px 16px !important;
    font-size: 16px;
  }
  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }
}
@media (max-width: 767.98px) {
  :root {
    --section-space: 64px;
  }
  .page-hero {
    padding: 120px 0 52px;
    min-height: 330px;
  }
  .hero-title {
    font-size: 28px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .section-title {
    font-size: 26px;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .faq-body {
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-question {
    padding: 16px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .cta-inner h2 {
    font-size: 28px;
  }
}
@media (max-width: 575.98px) {
  .hero-title {
    font-size: 24px;
  }
  .step-card {
    padding: 20px;
  }
  .card-cover {
    height: 170px;
  }
  .cta-inner h2 {
    font-size: 24px;
  }
}