/* roulang page: index */
:root {
      --bg-deep: #070C18;
      --bg-panel: #0D1526;
      --glass-bg: rgba(255, 255, 255, 0.045);
      --glass-border: rgba(148, 184, 255, 0.14);
      --ink-title: #E7EDF7;
      --ink-body: #9BA8BF;
      --ink-muted: #6B7890;
      --accent-teal: #35D0C0;
      --accent-amber: #F4B740;
      --danger: #FF6B6B;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 10px;
      --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
      --shadow-glow: 0 0 18px rgba(244, 183, 64, 0.45);
      --transition: 200ms ease;
      --sidebar-width: 240px;
      --content-gutter: 48px;
    }
    @media (min-width: 992px) and (max-width: 1199.98px) {
      :root {
        --sidebar-width: 208px;
        --content-gutter: 32px;
      }
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      margin: 0;
      background: var(--bg-deep);
      color: var(--ink-body);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--accent-teal);
      text-decoration: none;
    }
    a:hover {
      color: #5ce0d2;
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button,
    input {
      font: inherit;
    }
    button {
      cursor: pointer;
    }
    ul {
      margin: 0;
      padding: 0;
    }
    .page-container {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: var(--content-gutter);
      padding-right: var(--content-gutter);
    }

    /* ===== 左侧竖向导航 ===== */
    .offcanvas.site-sidebar {
      background: var(--bg-panel);
      border-right: 1px solid rgba(255, 255, 255, 0.06);
    }
    @media (min-width: 992px) {
      .offcanvas.site-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--sidebar-width);
        transform: none !important;
        visibility: visible !important;
        background: var(--bg-panel);
        border-right: 1px solid rgba(255, 255, 255, 0.06);
        z-index: 1040;
      }
      .offcanvas-backdrop.show {
        display: none;
      }
      .site-sidebar .btn-close {
        display: none;
      }
    }
    @media (max-width: 991.98px) {
      .offcanvas.site-sidebar {
        width: min(84vw, 320px);
      }
    }

    .offcanvas-header {
      align-items: flex-start;
      padding: 0;
    }
    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 24px 24px 6px;
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-title);
      letter-spacing: 0.02em;
    }
    .sidebar-brand:hover {
      color: var(--ink-title);
      text-decoration: none;
    }
    .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      color: var(--accent-teal);
      border: 1px solid rgba(53, 208, 192, 0.4);
      border-radius: 8px;
      background: rgba(53, 208, 192, 0.08);
    }
    .brand-mark svg {
      width: 16px;
      height: 16px;
    }
    .brand-badge {
      display: inline-block;
      margin: 0 24px 14px;
      padding: 2px 10px;
      font-size: 10px;
      letter-spacing: 0.16em;
      color: var(--accent-teal);
      border: 1px solid rgba(53, 208, 192, 0.35);
      border-radius: 999px;
      background: rgba(53, 208, 192, 0.08);
    }
    .offcanvas-body {
      display: flex;
      flex-direction: column;
      padding: 0;
      overflow-y: auto;
    }
    .nav-group-label {
      display: block;
      padding: 8px 24px 10px;
      font-size: 12px;
      letter-spacing: 0.12em;
      color: var(--ink-muted);
    }
    .sidebar-nav {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .sidebar-nav li a {
      position: relative;
      display: flex;
      align-items: center;
      gap: 12px;
      height: 44px;
      padding: 0 24px;
      margin: 0 12px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 500;
      color: var(--ink-body);
      transition: background var(--transition), color var(--transition);
    }
    .sidebar-nav li a svg {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
    }
    .sidebar-nav li a:hover {
      background: rgba(255, 255, 255, 0.06);
      color: var(--ink-title);
      text-decoration: none;
    }
    .sidebar-nav li a.active {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      color: var(--accent-teal);
      font-weight: 600;
    }
    .sidebar-nav li a.active::before {
      content: "";
      position: absolute;
      left: -12px;
      top: 10%;
      height: 80%;
      width: 3px;
      border-radius: 3px;
      background: var(--accent-teal);
    }
    .sidebar-footer {
      margin-top: auto;
      padding: 20px 24px 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 12px;
      color: var(--ink-muted);
      line-height: 1.7;
    }
    .sidebar-footer .deco {
      display: block;
      width: 48px;
      height: 24px;
      margin-bottom: 12px;
      opacity: 0.16;
      color: var(--accent-teal);
    }

    /* ===== 移动端顶栏 ===== */
    .mobile-header {
      position: sticky;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1030;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 56px;
      padding: 0 20px;
      background: rgba(13, 21, 38, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .mobile-brand {
      font-size: 16px;
      font-weight: 700;
      color: var(--ink-title);
      letter-spacing: 0.02em;
    }
    .mobile-brand:hover {
      color: var(--ink-title);
      text-decoration: none;
    }
    .mobile-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--glass-border);
      border-radius: 10px;
      color: var(--ink-title);
    }
    .mobile-toggle svg {
      width: 20px;
      height: 20px;
    }

    /* ===== 主体内容 ===== */
    .site-main {
      margin-left: var(--sidebar-width);
      width: calc(100% - var(--sidebar-width));
      min-height: 100vh;
    }
    @media (max-width: 991.98px) {
      .site-main {
        margin-left: 0;
        width: 100%;
      }
    }

    /* ===== 按钮 ===== */
    .btn-primary-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 32px;
      background: var(--accent-amber);
      color: #0B1220;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-glow);
      text-decoration: none;
      transition: background var(--transition), transform var(--transition), box-shadow var(--transition), color var(--transition);
    }
    .btn-primary-glow:hover {
      background: #FFC75F;
      color: #0B1220;
      transform: translateY(-2px);
      text-decoration: none;
      box-shadow: 0 0 28px rgba(244, 183, 64, 0.6);
    }
    .btn-primary-glow:active {
      transform: translateY(0);
      box-shadow: 0 0 8px rgba(244, 183, 64, 0.3);
    }
    .btn-glass {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 28px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(53, 208, 192, 0.5);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      font-weight: 600;
      text-decoration: none;
      transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
    }
    .btn-glass:hover {
      background: rgba(53, 208, 192, 0.12);
      color: var(--ink-title);
      border-color: var(--accent-teal);
      transform: translateY(-2px);
      text-decoration: none;
    }
    .btn-glass:active {
      transform: translateY(0);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 2px solid var(--accent-teal);
      outline-offset: 2px;
    }

    /* ===== Hero ===== */
    .hero {
      position: relative;
      min-height: 560px;
      display: flex;
      align-items: center;
      padding: 72px 0;
      background-image:
        linear-gradient(135deg, rgba(7, 12, 24, 0.92) 0%, rgba(7, 12, 24, 0.72) 100%),
        radial-gradient(circle at 20% 20%, rgba(53, 208, 192, 0.07), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(244, 183, 64, 0.05), transparent 35%),
        url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }
    .hero .page-container {
      position: relative;
      z-index: 1;
      width: 100%;
    }
    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      font-size: 12px;
      letter-spacing: 0.12em;
      color: var(--accent-teal);
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid var(--glass-border);
      border-radius: 999px;
      margin-bottom: 24px;
    }
    .hero-eyebrow .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-teal);
      box-shadow: 0 0 8px var(--accent-teal);
    }
    .hero-title {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: 0.02em;
      color: var(--ink-title);
      max-width: 18em;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 17px;
      line-height: 1.8;
      color: var(--ink-body);
      max-width: 58ch;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 44px;
    }
    .trust-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 14px 36px;
      margin-top: 12px;
    }
    .trust-strip span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--ink-muted);
    }
    .trust-strip svg {
      width: 16px;
      height: 16px;
      color: var(--accent-teal);
    }

    /* ===== 通用板块 ===== */
    .section {
      padding: 72px 0;
    }
    .section-head {
      margin-bottom: 48px;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      letter-spacing: 0.12em;
      font-weight: 600;
      color: var(--accent-teal);
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 650;
      line-height: 1.35;
      letter-spacing: 0.02em;
      color: var(--ink-title);
      margin: 0 0 14px;
    }
    .section-desc {
      color: var(--ink-body);
      max-width: 72ch;
      margin: 0;
    }
    @media (max-width: 991.98px) {
      .section {
        padding: 48px 0;
      }
      .section-title {
        font-size: 24px;
      }
    }

    /* ===== 故事 / 理念区 ===== */
    .story-section {
      background: transparent;
    }
    .story-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 64px;
      align-items: center;
    }
    .story-text p {
      margin: 0 0 20px;
      max-width: 72ch;
    }
    .story-text .btn-glass {
      margin-top: 8px;
    }
    .story-media {
      position: relative;
    }
    .story-media img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: transform 0.24s ease, box-shadow 0.24s ease;
    }
    .story-media:hover img {
      transform: scale(1.02);
      box-shadow: var(--shadow-hover);
    }
    .story-float {
      position: absolute;
      bottom: -20px;
      left: 24px;
      padding: 12px 20px;
      background: rgba(13, 21, 38, 0.92);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      font-size: 13px;
      color: var(--ink-body);
    }
    @media (max-width: 991.98px) {
      .story-grid {
        grid-template-columns: 1fr;
        gap: 48px;
      }
      .story-media img {
        height: 320px;
      }
    }

    /* ===== 精选内容卡 ===== */
    .featured-section {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .featured-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .featured-card--large {
      grid-column: span 2;
    }
    .featured-card {
      display: flex;
      flex-direction: column;
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .featured-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(53, 208, 192, 0.35);
    }
    .card-media {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }
    .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.24s ease;
    }
    .featured-card:hover .card-media img {
      transform: scale(1.05);
    }
    .card-chip {
      position: absolute;
      top: 14px;
      left: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      font-size: 12px;
      color: var(--accent-teal);
      border: 1px solid rgba(53, 208, 192, 0.35);
      border-radius: 999px;
      background: rgba(7, 12, 24, 0.72);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
    }
    .card-body {
      display: flex;
      flex-direction: column;
      flex: 1;
      padding: 22px 22px 24px;
    }
    .card-title {
      font-size: 20px;
      font-weight: 650;
      color: var(--ink-title);
      margin: 0 0 10px;
      letter-spacing: 0.01em;
    }
    .card-desc {
      font-size: 14px;
      color: var(--ink-body);
      margin: 0 0 18px;
      line-height: 1.75;
    }
    .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: auto;
      font-size: 13px;
      color: var(--ink-muted);
    }
    .card-link {
      color: var(--accent-teal);
      font-weight: 600;
    }
    .card-link:hover {
      text-decoration: underline;
    }
    @media (max-width: 991.98px) {
      .featured-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .featured-card--large {
        grid-column: span 2;
      }
    }
    @media (max-width: 575.98px) {
      .featured-grid {
        grid-template-columns: 1fr;
      }
      .featured-card--large {
        grid-column: auto;
      }
      .card-title {
        font-size: 18px;
      }
    }

    /* ===== 最新资讯 CMS 列表 ===== */
    .latest-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .news-item {
      display: flex;
      gap: 20px;
      padding: 20px;
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    }
    .news-item:hover {
      border-color: rgba(53, 208, 192, 0.35);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
      text-decoration: none;
    }
    .news-item:hover .news-title {
      color: var(--accent-teal);
    }
    .news-icon {
      width: 88px;
      height: 88px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(53, 208, 192, 0.08);
      border: 1px solid rgba(53, 208, 192, 0.22);
      border-radius: var(--radius-md);
      color: var(--accent-teal);
    }
    .news-icon svg {
      width: 28px;
      height: 28px;
    }
    .news-content {
      flex: 1;
      min-width: 0;
    }
    .news-top {
      display: flex;
      align-items: center;
      margin-bottom: 6px;
    }
    .badge-soft {
      display: inline-flex;
      align-items: center;
      padding: 3px 10px;
      font-size: 12px;
      color: var(--accent-teal);
      border: 1px solid rgba(53, 208, 192, 0.35);
      border-radius: 999px;
      background: rgba(53, 208, 192, 0.06);
    }
    .news-title {
      font-size: 18px;
      font-weight: 650;
      color: var(--ink-title);
      margin: 0 0 6px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      transition: color var(--transition);
    }
    .news-desc {
      font-size: 14px;
      color: var(--ink-body);
      margin: 0 0 12px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .news-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 13px;
      color: var(--ink-muted);
    }
    .news-meta svg {
      width: 14px;
      height: 14px;
      margin-right: 4px;
      vertical-align: -2px;
    }
    .empty-tip {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 12px;
      padding: 64px 24px;
      background: var(--glass-bg);
      border: 1px dashed var(--glass-border);
      border-radius: var(--radius-lg);
      color: var(--ink-muted);
      text-align: center;
    }
    .empty-tip svg {
      width: 36px;
      height: 36px;
      opacity: 0.5;
    }
    .empty-tip p {
      margin: 0;
      font-size: 14px;
    }
    @media (max-width: 575.98px) {
      .news-item {
        gap: 14px;
        padding: 16px;
      }
      .news-icon {
        width: 64px;
        height: 64px;
      }
      .news-icon svg {
        width: 22px;
        height: 22px;
      }
      .news-title {
        font-size: 16px;
      }
    }

    /* ===== 信任背书 ===== */
    .trust-bar {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      padding: 36px 40px;
      background: rgba(13, 21, 38, 0.6);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .trust-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 14px;
      color: var(--ink-body);
    }
    .trust-item .icon-box {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      flex-shrink: 0;
      background: rgba(53, 208, 192, 0.1);
      border: 1px solid rgba(53, 208, 192, 0.25);
      border-radius: 10px;
      color: var(--accent-teal);
    }
    .trust-item .icon-box svg {
      width: 20px;
      height: 20px;
    }
    @media (max-width: 991.98px) {
      .trust-bar {
        flex-wrap: wrap;
        padding: 24px;
      }
      .trust-item {
        width: calc(50% - 20px);
      }
    }
    @media (max-width: 575.98px) {
      .trust-item {
        width: 100%;
      }
    }

    /* ===== FAQ ===== */
    .faq-section {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .faq-accordion {
      max-width: 860px;
    }
    .accordion-item {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg) !important;
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color var(--transition), box-shadow var(--transition);
    }
    .accordion-item:has(.accordion-button:not(.collapsed)) {
      border-color: rgba(53, 208, 192, 0.4);
      box-shadow: 0 0 0 1px rgba(53, 208, 192, 0.15);
    }
    .accordion-button {
      background: transparent;
      color: var(--ink-title);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 24px;
      box-shadow: none !important;
      border-radius: var(--radius-lg) !important;
      transition: color var(--transition), background var(--transition);
    }
    .accordion-button:hover {
      background: rgba(255, 255, 255, 0.03);
    }
    .accordion-button:not(.collapsed) {
      color: var(--accent-teal);
      background: rgba(53, 208, 192, 0.06);
    }
    .accordion-button::after {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23F4B740' stroke-width='2' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
      width: 16px;
      height: 16px;
      transition: transform var(--transition);
    }
    .accordion-body {
      padding: 0 24px 24px;
      color: var(--ink-body);
      font-size: 14px;
      line-height: 1.8;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 16px;
    }

    /* ===== 订阅 / CTA ===== */
    .cta-panel {
      position: relative;
      overflow: hidden;
      text-align: center;
      padding: 64px 48px;
      background:
        radial-gradient(circle at 50% 0%, rgba(53, 208, 192, 0.1), transparent 60%),
        rgba(13, 21, 38, 0.82);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .cta-panel .section-title {
      font-size: 26px;
    }
    .cta-desc {
      color: var(--ink-body);
      max-width: 52ch;
      margin: 0 auto 32px;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 560px;
      margin: 0 auto;
    }
    .cta-form .form-control {
      flex: 1;
      height: 48px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      color: var(--ink-title);
      padding: 0 16px;
      transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .cta-form .form-control::placeholder {
      color: var(--ink-muted);
    }
    .cta-form .form-control:focus {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--accent-teal);
      box-shadow: 0 0 0 2px rgba(53, 208, 192, 0.25);
      color: var(--ink-title);
    }
    .cta-note {
      margin-top: 18px;
      font-size: 12px;
      color: var(--ink-muted);
    }
    @media (max-width: 575.98px) {
      .cta-panel {
        padding: 40px 20px;
      }
      .cta-form {
        flex-direction: column;
      }
      .cta-form .btn-primary-glow {
        width: 100%;
      }
    }

    /* ===== 页脚 ===== */
    .site-footer {
      margin-left: var(--sidebar-width);
      width: calc(100% - var(--sidebar-width));
      background: var(--bg-panel);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 56px 0 0;
    }
    @media (max-width: 991.98px) {
      .site-footer {
        margin-left: 0;
        width: 100%;
      }
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
    }
    .footer-brand-name {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-title);
      margin-bottom: 12px;
    }
    .footer-brand-name svg {
      width: 22px;
      height: 22px;
      color: var(--accent-teal);
    }
    .footer-brand-desc {
      font-size: 14px;
      color: var(--ink-body);
      max-width: 36ch;
      margin: 0;
    }
    .footer-col-title {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--ink-title);
      margin-bottom: 14px;
    }
    .footer-links ul {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      font-size: 14px;
      color: var(--ink-body);
      transition: color var(--transition);
    }
    .footer-links a:hover {
      color: var(--accent-teal);
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    .footer-info {
      font-size: 14px;
      color: var(--ink-body);
      margin: 0;
      line-height: 1.8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 20px 0 24px;
      font-size: 13px;
      color: var(--ink-muted);
      text-align: center;
    }
    @media (max-width: 991.98px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
    }
    @media (max-width: 575.98px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===== 动效降级 ===== */
    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
      }
      html {
        scroll-behavior: auto;
      }
    }

/* roulang page: category1 */
:root {
  --bg-deep: #070C18;
  --bg-panel: #0D1526;
  --glass-bg: rgba(255,255,255,0.045);
  --glass-border: rgba(148,184,255,0.14);
  --ink-title: #E7EDF7;
  --ink-body: #9BA8BF;
  --ink-muted: #6B7890;
  --accent-teal: #35D0C0;
  --accent-amber: #F4B740;
  --danger: #FF6B6B;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 12px;
  --shadow-card: 0 10px 30px rgba(0,0,0,.35);
  --shadow-hover: 0 16px 40px rgba(0,0,0,.45);
  --transition: 180ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  background: var(--bg-deep);
  color: var(--ink-body);
  -webkit-font-smoothing: antialiased;
  position: relative;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(53,208,192,0.07), transparent 45%),
    radial-gradient(ellipse at 85% 90%, rgba(244,183,64,0.05), transparent 40%),
    linear-gradient(rgba(148,184,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,184,255,0.04) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}
a {
  color: var(--accent-teal);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition);
}
a:hover {
  color: var(--accent-teal);
  text-decoration: underline;
  text-underline-offset: 4px;
}
img { max-width: 100%; height: auto; vertical-align: middle; }
svg { flex-shrink: 0; }
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
}
@media (min-width: 992px) and (max-width: 1199.98px) {
  .page-container { padding: 0 32px; }
}
@media (max-width: 991.98px) {
  .page-container { padding: 0 20px; }
}

/* 桌面侧导航 */
.side-nav {
  position: fixed;
  top: 0; left: 0;
  width: 240px;
  height: 100vh;
  background: var(--bg-panel);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  z-index: 1040;
}
@media (min-width: 992px) and (max-width: 1199.98px) {
  .side-nav { width: 208px; padding: 20px 14px; }
}
.brand-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 8px 8px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 16px;
}
.brand-mark {
  width: 40px; height: 40px;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}
.brand-mark svg { width: 30px; height: 30px; }
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  line-height: 1.3;
}
.brand-badge {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent-teal);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 2px 10px;
  margin-top: 6px;
  text-transform: uppercase;
}
.nav-section-title {
  font-size: 12px;
  color: var(--ink-muted);
  letter-spacing: 0.12em;
  padding: 0 8px;
  margin: 16px 0 8px;
  text-transform: uppercase;
}
.side-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-link-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: 10px;
  color: var(--ink-body);
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}
.nav-link-item:hover {
  background: rgba(255,255,255,0.06);
  color: var(--ink-title);
  text-decoration: none;
}
.nav-link-item.active {
  background: var(--glass-bg);
  border-left-color: var(--accent-teal);
  color: var(--accent-teal);
}
.nav-link-item svg {
  width: 18px; height: 18px;
}
.side-nav-footer {
  margin-top: auto;
  padding: 16px 8px 4px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.service-note {
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}
.copyright {
  font-size: 11px;
  color: var(--ink-muted);
  opacity: 0.7;
}
.side-nav-deco {
  width: 100%;
  height: 30px;
  color: var(--ink-muted);
  opacity: 0.2;
  margin-top: 8px;
}

/* 移动端 header */
.mobile-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: rgba(7,12,24,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1050;
}
.mobile-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-title);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.mobile-header .mobile-brand:hover { text-decoration: none; color: var(--ink-title); }
.mobile-toggle {
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--ink-title);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}
.mobile-toggle:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}
.mobile-toggle:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}
.mobile-toggle svg { width: 22px; height: 22px; }

/* 主内容区 */
.site-main {
  margin-left: 240px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}
@media (min-width: 992px) and (max-width: 1199.98px) {
  .site-main { margin-left: 208px; }
}
@media (max-width: 991.98px) {
  .site-main { margin-left: 0; padding-top: 56px; }
}

/* 页面头 */
.page-header {
  padding: 40px 0 8px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding: 0;
  margin: 0 0 16px;
  list-style: none;
  font-size: 13px;
  color: var(--ink-muted);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  padding: 0 8px;
  color: var(--ink-muted);
  opacity: 0.5;
}
.breadcrumb-item a { color: var(--ink-muted); }
.breadcrumb-item a:hover { color: var(--accent-teal); }
.breadcrumb-item.active { color: var(--accent-teal); }
.page-header h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  line-height: 1.25;
}
.page-lead {
  font-size: 16px;
  color: var(--ink-body);
  max-width: 72ch;
  line-height: 1.75;
  margin-bottom: 24px;
}
@media (max-width: 991.98px) {
  .page-header { padding: 28px 0 4px; }
  .page-header h1 { font-size: 32px; }
}

/* 板块通用 */
.page-section { padding: 28px 0; }
@media (max-width: 991.98px) {
  .page-section { padding: 24px 0; }
}
.section-heading {
  margin-bottom: 28px;
}
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-teal);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-heading h2,
.intro-section h2 {
  font-size: 30px;
  font-weight: 650;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  line-height: 1.4;
}
@media (max-width: 767.98px) {
  .section-heading h2,
  .intro-section h2 { font-size: 24px; }
}

/* 图文 intro */
.intro-section .row {
  margin-top: 8px;
}
.intro-visual {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
  background: var(--bg-panel);
}
.intro-visual img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
  transition: transform var(--transition);
}
.intro-visual:hover img { transform: scale(1.03); }

.feature-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  color: var(--ink-body);
  font-size: 14px;
}
.feature-list svg {
  width: 16px; height: 16px;
  color: var(--accent-teal);
}

/* 要点卡 */
.points-section { margin-top: 8px; }
.point-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 24px;
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.point-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover), 0 0 0 1px rgba(53,208,192,0.35);
  border-color: var(--accent-teal);
}
.point-icon {
  width: 40px; height: 40px;
  background: rgba(53,208,192,0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-teal);
  margin-bottom: 16px;
}
.point-icon svg { width: 20px; height: 20px; }
.point-card h3 {
  font-size: 18px;
  font-weight: 650;
  color: var(--ink-title);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.point-card p {
  font-size: 14px;
  color: var(--ink-body);
  line-height: 1.7;
  margin: 0;
  max-width: 42ch;
}

/* FAQ 手风琴 */
.faq-section { margin-top: 8px; }
.custom-accordion {
  margin-top: 8px;
}
.custom-accordion .accordion-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.custom-accordion .accordion-item:focus-within {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 1px rgba(53,208,192,0.25);
}
.custom-accordion .accordion-button {
  background: transparent;
  color: var(--ink-title);
  font-size: 16px;
  font-weight: 600;
  min-height: 48px;
  padding: 16px 20px;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: none;
  border-radius: 16px !important;
  width: 100%;
  text-align: left;
}
.custom-accordion .accordion-button::after {
  display: none;
}
.custom-accordion .accordion-button:not(.collapsed) {
  color: var(--accent-teal);
  background: transparent;
}
.custom-accordion .accordion-button:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: -2px;
  border-radius: 16px;
}
.accordion-arrow {
  width: 24px; height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(53,208,192,0.1);
  color: var(--accent-teal);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.accordion-button:not(.collapsed) .accordion-arrow {
  transform: rotate(180deg);
}
.custom-accordion .accordion-body {
  padding: 0 24px 24px 16px;
  margin: 0 20px 0;
  border-left: 2px solid var(--accent-teal);
  color: var(--ink-body);
  font-size: 14px;
  line-height: 1.75;
}

/* CTA 区 */
.cta-section { margin-top: 8px; }
.cta-panel {
  background: var(--bg-panel);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: -30%; right: -10%;
  width: 50%; height: 80%;
  background: radial-gradient(ellipse, rgba(244,183,64,0.1), transparent 70%);
  pointer-events: none;
}
.cta-panel h2 {
  font-size: 24px;
  font-weight: 650;
  color: var(--ink-title);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.cta-panel p {
  font-size: 14px;
  color: var(--ink-body);
  margin-bottom: 24px;
  max-width: 48ch;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
@media (max-width: 575.98px) {
  .cta-panel { padding: 32px 20px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  border: none;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary-glow {
  background: var(--accent-amber);
  color: #0B1220 !important;
  box-shadow: 0 0 18px rgba(244,183,64,0.45);
}
.btn-primary-glow:hover {
  background: #FFC75F;
  box-shadow: 0 0 28px rgba(244,183,64,0.55);
  transform: translateY(-2px);
  color: #0B1220 !important;
  text-decoration: none;
}
.btn-primary-glow:active {
  transform: translateY(0);
  box-shadow: 0 0 10px rgba(244,183,64,0.3);
}
.btn-primary-glow:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}
.btn-glass {
  background: var(--glass-bg);
  border: 1px solid var(--accent-teal);
  color: var(--accent-teal) !important;
}
.btn-glass:hover {
  background: rgba(53,208,192,0.12);
  color: var(--accent-teal) !important;
  text-decoration: none;
}
.btn-glass:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}

/* 页脚 */
.site-footer {
  padding: 48px 0 0;
  border-top: 1px solid var(--glass-border);
  background: var(--bg-panel);
  margin-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 32px;
  margin-bottom: 32px;
}
@media (max-width: 991.98px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 575.98px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-title);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.footer-brand-name svg {
  width: 24px; height: 24px;
  color: var(--accent-teal);
}
.footer-brand-desc {
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.7;
  max-width: 36ch;
  margin-bottom: 0;
}
.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-title);
  display: block;
  margin-bottom: 12px;
}
.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 8px;
}
.footer-links a {
  font-size: 13px;
  color: var(--ink-body);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--accent-teal);
  text-decoration: none;
}
.footer-info p {
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.7;
  margin-bottom: 0;
}
.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: var(--ink-muted);
  text-align: center;
}

/* offcanvas 覆盖 */
.offcanvas {
  background: rgba(13,21,38,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--glass-border);
}
.offcanvas .offcanvas-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  justify-content: space-between;
  align-items: center;
}
.offcanvas .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
  opacity: 0.6;
  transition: opacity var(--transition);
}
.offcanvas .btn-close:hover { opacity: 1; }
.offcanvas .offcanvas-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
}
.offcanvas-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.offcanvas-brand:hover { color: var(--ink-title); text-decoration: none; }
.offcanvas-brand svg {
  width: 24px; height: 24px;
  color: var(--accent-teal);
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .point-card:hover,
  .btn-primary-glow:hover,
  .btn-glass:hover { transform: none; }
  .intro-visual:hover img { transform: none; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
      --bg-deep: #070C18;
      --bg-panel: #0D1526;
      --glass-bg: rgba(255, 255, 255, 0.045);
      --glass-border: rgba(148, 184, 255, 0.14);
      --ink-title: #E7EDF7;
      --ink-body: #9BA8BF;
      --ink-muted: #6B7890;
      --accent-teal: #35D0C0;
      --accent-amber: #F4B740;
      --danger: #FF6B6B;
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-pill: 999px;
      --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
      --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(53, 208, 192, 0.35);
      --glow-amber: 0 0 18px rgba(244, 183, 64, 0.45);
      --transition: 240ms ease;
    }

    /* ===== Reset / 全局基础 ===== */
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
      background-color: var(--bg-deep);
      color: var(--ink-body);
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    a { color: inherit; text-decoration: none; transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
    a:hover { color: var(--accent-teal); }
    img { max-width: 100%; display: block; }
    button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
    input { font-family: inherit; outline: none; }

    h1, h2, h3, h4, h5, h6 { color: var(--ink-title); line-height: 1.4; margin-top: 0; }
    p { margin-top: 0; }

    .page-container {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* ===== 左侧竖向导航 ===== */
    .site-sidebar {
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      width: 240px;
      z-index: 1030;
      background: var(--bg-panel);
      border-right: 1px solid rgba(148, 184, 255, 0.12);
      padding: 28px 16px 20px;
      display: flex;
      flex-direction: column;
      overflow-y: auto;
      overflow-x: hidden;
    }
    .sidebar-inner { display: flex; flex-direction: column; min-height: 100%; }
    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      color: var(--ink-title);
      letter-spacing: 0.02em;
      padding: 8px 10px;
      transition: opacity 0.2s ease;
    }
    .sidebar-brand:hover { color: var(--ink-title); opacity: 0.9; }
    .sidebar-brand svg { width: 24px; height: 24px; color: var(--accent-teal); flex-shrink: 0; }
    .brand-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: fit-content;
      margin: 12px 0 28px 10px;
      padding: 3px 12px;
      border-radius: 999px;
      font-size: 11px;
      letter-spacing: 1.5px;
      color: var(--accent-teal);
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(53, 208, 192, 0.28);
    }
    .sidebar-nav-group {
      padding: 0 10px;
      margin-bottom: 8px;
      font-size: 12px;
      letter-spacing: 0.12em;
      color: var(--ink-muted);
    }
    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .sidebar-nav-link {
      display: flex;
      align-items: center;
      height: 44px;
      padding: 0 14px;
      border-radius: 10px;
      border-left: 3px solid transparent;
      color: var(--ink-body);
      font-size: 14px;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }
    .sidebar-nav-link:hover {
      background: rgba(255, 255, 255, 0.06);
      color: var(--ink-title);
      text-decoration: none;
    }
    .sidebar-nav-link.active {
      background: rgba(255, 255, 255, 0.06);
      border-left-color: var(--accent-teal);
      color: var(--accent-teal);
      font-weight: 500;
    }
    .sidebar-footer {
      margin-top: auto;
      border-top: 1px solid rgba(148, 184, 255, 0.08);
      padding: 16px 10px 8px;
      font-size: 12px;
      color: var(--ink-muted);
      line-height: 1.8;
    }

    /* ===== 移动端顶部栏与抽屉导航 ===== */
    .mobile-header {
      position: sticky;
      top: 0;
      z-index: 1020;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 56px;
      padding: 0 16px;
      background: rgba(13, 21, 38, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(148, 184, 255, 0.12);
    }
    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-title);
      letter-spacing: 0.02em;
    }
    .mobile-brand:hover { color: var(--ink-title); }
    .mobile-toggle {
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      color: var(--ink-title);
      border: 1px solid rgba(148, 184, 255, 0.16);
      background: rgba(255, 255, 255, 0.04);
      transition: background-color 0.2s ease;
    }
    .mobile-toggle:hover { background: rgba(255, 255, 255, 0.08); color: var(--accent-teal); }
    .mobile-toggle svg { width: 22px; height: 22px; }

    .aside-offcanvas {
      --bs-offcanvas-width: min(84vw, 320px);
      background: rgba(13, 21, 38, 0.98) !important;
      border-right: 1px solid rgba(148, 184, 255, 0.14);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
    }
    .aside-offcanvas .offcanvas-header {
      padding: 18px 20px;
      border-bottom: 1px solid rgba(148, 184, 255, 0.08);
    }
    .offcanvas-title {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--ink-title);
    }
    .offcanvas-title svg { width: 24px; height: 24px; color: var(--accent-teal); }
    .aside-offcanvas .offcanvas-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
    }
    .aside-offcanvas .sidebar-nav-link {
      width: 100%;
      margin-bottom: 4px;
    }
    .aside-offcanvas .sidebar-footer { margin-top: auto; }

    /* ===== 主内容区域 ===== */
    .site-main {
      margin-left: 240px;
      min-height: 100vh;
      padding: 48px;
      position: relative;
      overflow-x: hidden;
      background:
        radial-gradient(circle at 0% 0%, rgba(53, 208, 192, 0.05) 0%, transparent 35%),
        radial-gradient(circle at 100% 100%, rgba(244, 183, 64, 0.04) 0%, transparent 40%),
        var(--bg-deep);
    }
    .site-main::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(148, 184, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 184, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    .site-main > .page-container {
      position: relative;
      z-index: 1;
      padding-left: 0;
      padding-right: 0;
    }

    /* ===== 文章页 ===== */
    .article-wrap {
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .breadcrumb-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--ink-muted);
      margin-bottom: 28px;
    }
    .breadcrumb-nav a { color: var(--ink-muted); transition: color 0.2s ease; }
    .breadcrumb-nav a:hover { color: var(--accent-teal); }
    .breadcrumb-sep { color: rgba(107, 120, 144, 0.5); }
    .breadcrumb-cat { color: var(--accent-teal); }
    .breadcrumb-current {
      color: var(--ink-body);
      max-width: 320px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .article-title {
      font-size: 44px;
      font-weight: 700;
      color: var(--ink-title);
      letter-spacing: 0.02em;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px 24px;
      color: var(--ink-muted);
      font-size: 13px;
      padding-bottom: 24px;
      margin-bottom: 32px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .meta-item { display: inline-flex; align-items: center; gap: 6px; }
    .meta-item svg { width: 15px; height: 15px; flex-shrink: 0; }

    /* 文章正文 */
    .article-content { max-width: 72ch; }
    .article-content p { margin-bottom: 24px; color: var(--ink-body); line-height: 1.75; }
    .article-content h2 {
      font-size: 24px;
      font-weight: 650;
      color: var(--ink-title);
      margin-top: 40px;
      margin-bottom: 16px;
    }
    .article-content h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--ink-title);
      margin-top: 28px;
      margin-bottom: 12px;
    }
    .article-content h4 {
      font-size: 18px;
      font-weight: 600;
      color: var(--ink-title);
      margin-top: 24px;
      margin-bottom: 12px;
    }
    .article-content a { color: var(--accent-teal); border-bottom: 1px solid rgba(53, 208, 192, 0.3); }
    .article-content a:hover { border-bottom-color: var(--accent-teal); color: var(--accent-teal); }
    .article-content img { border-radius: 12px; margin: 16px 0; height: auto; }
    .article-content blockquote {
      border-left: 4px solid var(--accent-teal);
      background: rgba(255, 255, 255, 0.045);
      border-radius: 0 12px 12px 0;
      padding: 16px 20px;
      margin: 24px 0;
      color: var(--ink-body);
    }
    .article-content ul,
    .article-content ol { padding-left: 24px; margin-bottom: 24px; }
    .article-content li { margin-bottom: 8px; }
    .article-content hr { border: none; border-top: 1px solid rgba(255, 255, 255, 0.06); margin: 32px 0; }
    .article-content code {
      background: rgba(148, 184, 255, 0.1);
      border-radius: 6px;
      padding: 2px 8px;
      font-size: 0.9em;
      color: var(--accent-teal);
    }
    .article-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
    .article-content th,
    .article-content td {
      border: 1px solid rgba(148, 184, 255, 0.14);
      padding: 10px 14px;
      text-align: left;
    }
    .article-content th { background: rgba(148, 184, 255, 0.06); color: var(--ink-title); }

    /* 空态 */
    .article-empty {
      padding: 80px 24px;
      text-align: center;
      background: rgba(255, 255, 255, 0.045);
      border: 1px dashed rgba(148, 184, 255, 0.2);
      border-radius: 16px;
    }
    .article-empty h2 {
      font-size: 24px;
      font-weight: 650;
      color: var(--ink-title);
      margin-bottom: 20px;
    }

    /* 标签 */
    .article-tags {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      margin-top: 40px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }
    .article-tags-label {
      margin-right: 4px;
      font-size: 12px;
      letter-spacing: 0.12em;
      color: var(--ink-muted);
    }
    .tag-chip {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(148, 184, 255, 0.16);
      color: var(--ink-body);
      font-size: 12px;
      transition: all 0.2s ease;
    }
    .tag-chip:hover {
      color: var(--accent-teal);
      border-color: rgba(53, 208, 192, 0.4);
      text-decoration: none;
    }

    /* 上一篇 / 下一篇 */
    .article-pager {
      display: flex;
      gap: 16px;
      margin-top: 32px;
    }
    .pager-link {
      flex: 1;
      padding: 18px 22px;
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(148, 184, 255, 0.14);
      border-radius: 14px;
      transition: all 0.24s ease;
    }
    .pager-link:hover {
      transform: translateY(-4px);
      border-color: rgba(53, 208, 192, 0.4);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(53, 208, 192, 0.35);
      text-decoration: none;
    }
    .pager-direction { display: block; font-size: 12px; color: var(--ink-muted); margin-bottom: 4px; }
    .pager-title { display: block; font-size: 14px; font-weight: 600; color: var(--ink-title); transition: color 0.2s ease; }
    .pager-link:hover .pager-title { color: var(--accent-teal); }
    .pager-next { text-align: right; }

    /* 相关推荐 */
    .related-section { margin-top: 48px; }
    .related-title {
      font-size: 24px;
      font-weight: 650;
      color: var(--ink-title);
      margin-bottom: 20px;
    }
    .list-card {
      display: flex;
      gap: 16px;
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(148, 184, 255, 0.14);
      border-radius: 16px;
      padding: 16px;
      margin-bottom: 12px;
      transition: all 0.24s ease;
    }
    .list-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(53, 208, 192, 0.35);
      border-color: rgba(53, 208, 192, 0.4);
    }
    .list-card-thumb {
      width: 88px;
      height: 88px;
      border-radius: 12px;
      overflow: hidden;
      flex-shrink: 0;
    }
    .list-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
    .list-card:hover .list-card-thumb img { transform: scale(1.05); }
    .list-card-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }
    .list-card-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--ink-title);
      margin-bottom: 6px;
      line-height: 1.5;
    }
    .list-card-title a { color: inherit; transition: color 0.2s ease; }
    .list-card-title a:hover { color: var(--accent-teal); }
    .list-card-desc {
      font-size: 13px;
      color: var(--ink-body);
      line-height: 1.6;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .list-card-foot {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: var(--ink-muted);
      margin-top: auto;
    }
    .card-category-badge {
      padding: 3px 10px;
      border: 1px solid rgba(53, 208, 192, 0.35);
      border-radius: 999px;
      font-size: 11px;
      color: var(--accent-teal);
      background: rgba(53, 208, 192, 0.08);
    }
    .list-card-link {
      margin-left: auto;
      color: var(--accent-teal);
      font-size: 12px;
    }
    .list-card-link:hover { text-decoration: underline; text-underline-offset: 4px; }

    /* ===== 按钮 ===== */
    .btn-primary-glow {
      background: var(--accent-amber);
      color: #0B1220;
      border: none;
      border-radius: 10px;
      padding: 14px 32px;
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 0 18px rgba(244, 183, 64, 0.45);
      transition: all 0.24s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      line-height: 1;
    }
    .btn-primary-glow:hover {
      background: #FFC75F;
      color: #0B1220;
      transform: translateY(-2px);
      box-shadow: 0 0 26px rgba(244, 183, 64, 0.65);
    }
    .btn-primary-glow:active {
      transform: translateY(0);
      box-shadow: 0 0 10px rgba(244, 183, 64, 0.3);
    }
    .btn-primary-glow:focus-visible {
      outline: 2px solid var(--accent-teal);
      outline-offset: 2px;
    }
    .btn-glass {
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(53, 208, 192, 0.5);
      color: var(--accent-teal);
      border-radius: 10px;
      padding: 14px 28px;
      font-weight: 600;
      font-size: 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      transition: all 0.24s ease;
    }
    .btn-glass:hover {
      background: rgba(53, 208, 192, 0.12);
      color: var(--accent-teal);
      transform: translateY(-2px);
      box-shadow: 0 0 0 1px rgba(53, 208, 192, 0.35);
    }

    /* ===== 返回顶部 ===== */
    .back-top {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(13, 21, 38, 0.9);
      border: 1px solid rgba(148, 184, 255, 0.18);
      color: var(--accent-teal);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
      z-index: 980;
      transition: all 0.24s ease;
      backdrop-filter: blur(10px);
    }
    .back-top:hover {
      transform: translateY(-4px);
      color: var(--accent-teal);
      border-color: rgba(53, 208, 192, 0.4);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(53, 208, 192, 0.35);
    }
    .back-top svg { width: 20px; height: 20px; }

    /* ===== 页脚 ===== */
    .site-footer {
      margin-left: 240px;
      background: rgba(13, 21, 38, 0.55);
      border-top: 1px solid rgba(148, 184, 255, 0.08);
      padding: 56px 0 24px;
      position: relative;
      z-index: 1;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
    }
    .footer-brand-name {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      color: var(--ink-title);
      margin-bottom: 14px;
    }
    .footer-brand-name svg { width: 24px; height: 24px; color: var(--accent-teal); }
    .footer-brand-desc { font-size: 13px; line-height: 1.8; color: var(--ink-muted); max-width: 300px; }
    .footer-col-title {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--ink-title);
      margin-bottom: 14px;
      letter-spacing: 0.04em;
    }
    .footer-links ul { list-style: none; margin: 0; padding: 0; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { font-size: 14px; color: var(--ink-body); transition: color 0.2s ease; }
    .footer-links a:hover { color: var(--accent-teal); }
    .footer-info p { font-size: 13px; color: var(--ink-muted); line-height: 1.8; margin: 0; max-width: 260px; }
    .footer-bottom {
      border-top: 1px solid rgba(148, 184, 255, 0.08);
      padding-top: 20px;
      color: var(--ink-muted);
      font-size: 12px;
      text-align: center;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1199.98px) {
      .site-sidebar { width: 208px; }
      .site-main { margin-left: 208px; padding: 32px; }
      .site-footer { margin-left: 208px; }
    }
    @media (max-width: 991.98px) {
      .site-main { margin-left: 0; padding: 24px 20px; }
      .site-footer { margin-left: 0; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
      .article-title { font-size: 32px; }
      .article-pager { flex-direction: column; }
      .back-top { right: 16px; bottom: 16px; }
    }
    @media (max-width: 575.98px) {
      .page-container { padding-left: 16px; padding-right: 16px; }
      .site-main { padding: 20px 16px; }
      .site-main > .page-container { padding-left: 0; padding-right: 0; }
      .article-title { font-size: 30px; }
      .article-meta { gap: 12px 16px; }
      .list-card { padding: 12px; gap: 12px; }
      .list-card-thumb { width: 64px; height: 64px; }
      .footer-grid { grid-template-columns: 1fr; }
      .site-footer { padding-top: 40px; }
      .btn-primary-glow, .btn-glass { width: 100%; }
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      * { animation: none !important; transition: opacity 0.15s ease !important; }
      .list-card:hover,
      .pager-link:hover,
      .back-top:hover,
      .sidebar-nav-link:hover,
      .btn-primary-glow:hover,
      .btn-glass:hover { transform: none !important; }
    }

/* roulang page: category2 */
:root {
  --bg-deep: #070C18;
  --bg-panel: #0D1526;
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(148, 184, 255, 0.14);
  --ink-title: #E7EDF7;
  --ink-body: #9BA8BF;
  --ink-muted: #6B7890;
  --accent-teal: #35D0C0;
  --accent-amber: #F4B740;
  --danger: #FF6B6B;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-glass: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
  --shadow-amber: 0 0 18px rgba(244, 183, 64, 0.45);
  --sidebar-w: 240px;
  --sidebar-w-md: 208px;
  --transition: 200ms ease;
  --bs-body-font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --bs-body-color: #9BA8BF;
  --bs-body-bg: #070C18;
  --bs-link-color: #35D0C0;
  --bs-link-hover-color: #35D0C0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--ink-body);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-teal);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition);
}

a:hover {
  color: var(--accent-teal);
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

button,
input {
  font-family: inherit;
}

/* ---------- 左侧竖向导航 ---------- */
.site-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid rgba(148, 184, 255, 0.1);
  padding: 28px 16px 20px;
  display: flex;
  flex-direction: column;
  z-index: 1040;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px;
  text-decoration: none;
}

.sidebar-brand svg {
  width: 24px;
  height: 24px;
  color: var(--accent-teal);
  flex-shrink: 0;
}

.sidebar-brand span {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.sidebar-badge {
  margin: 12px 0 0 42px;
}

.badge-official {
  display: inline-block;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--accent-teal);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 4px 12px;
  border-radius: 999px;
  line-height: 1.4;
}

.nav-group-label {
  font-size: 12px;
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  padding: 0 10px;
  margin-top: 26px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  color: var(--ink-body);
  font-size: 15px;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  position: relative;
  border-left: 3px solid transparent;
}

.sidebar-nav .nav-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  flex-shrink: 0;
}

.sidebar-nav .nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink-title);
  text-decoration: none;
}

.sidebar-nav .nav-link.active {
  background: var(--glass-bg);
  border-left-color: var(--accent-teal);
  color: var(--accent-teal);
  font-weight: 500;
}

.sidebar-bottom {
  margin-top: auto;
  padding: 18px 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-bottom p {
  font-size: 12px;
  color: var(--ink-muted);
  margin: 0 0 6px;
  line-height: 1.6;
}

.sidebar-bottom .copyright {
  font-size: 12px;
  color: var(--ink-muted);
  opacity: 0.8;
}

/* ---------- 移动端顶栏 ---------- */
.mobile-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(7, 12, 24, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 184, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1030;
}

.mobile-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-title);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.mobile-brand:hover {
  color: var(--ink-title);
  text-decoration: none;
}

.mobile-toggle {
  background: transparent;
  border: 1px solid var(--glass-border);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-title);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), border-color var(--transition);
}

.mobile-toggle:hover {
  background: rgba(53, 208, 192, 0.08);
  border-color: rgba(53, 208, 192, 0.4);
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
}

/* ---------- Offcanvas 抽屉 ---------- */
#siteNav.offcanvas {
  background: rgba(13, 21, 38, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--glass-border);
  color: var(--ink-body);
  width: min(84vw, 320px);
}

#siteNav .offcanvas-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#siteNav .offcanvas-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-title);
}

#siteNav .btn-close {
  background: transparent url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23E7EDF7' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 6l12 12M18 6L6 18'/%3E%3C/svg%3E") center / 14px no-repeat;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  opacity: 1;
  transition: background-color var(--transition);
}

#siteNav .btn-close:hover {
  background-color: rgba(255, 255, 255, 0.06);
}

#siteNav .offcanvas-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
}

#siteNav .offcanvas-body .sidebar-nav .nav-link {
  height: 48px;
}

.offcanvas-backdrop {
  background-color: rgba(7, 12, 24, 0.6);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

/* ---------- 主内容布局 ---------- */
.main-content {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  position: relative;
}

.page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 48px;
  padding-right: 48px;
}

/* ---------- 通用按钮 ---------- */
.btn-primary-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-amber);
  color: #0B1220;
  font-weight: 600;
  font-size: 16px;
  height: 48px;
  padding: 0 32px;
  border-radius: 10px;
  text-decoration: none;
  box-shadow: var(--shadow-amber);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition), color var(--transition);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary-glow:hover {
  background: #FFC75F;
  color: #0B1220;
  text-decoration: none;
  box-shadow: 0 0 24px rgba(244, 183, 64, 0.6);
  transform: translateY(-2px);
}

.btn-primary-glow:active {
  transform: translateY(0);
  box-shadow: 0 0 10px rgba(244, 183, 64, 0.3);
}

.btn-primary-glow:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}

.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--accent-teal);
  color: var(--accent-teal);
  font-weight: 500;
  font-size: 16px;
  height: 48px;
  padding: 0 32px;
  border-radius: 10px;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), border-color var(--transition), color var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-glass:hover {
  background: rgba(53, 208, 192, 0.12);
  color: var(--accent-teal);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-glass:active {
  transform: translateY(0);
}

.btn-glass:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}

/* ---------- 页面头部 ---------- */
.page-head {
  background:
    radial-gradient(circle at 82% 18%, rgba(53, 208, 192, 0.07), transparent 58%),
    linear-gradient(rgba(148, 184, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 184, 255, 0.03) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 56px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-muted);
  margin-bottom: 24px;
}

.breadcrumb-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb-nav a:hover {
  color: var(--accent-teal);
}

.breadcrumb-nav .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.2);
}

.breadcrumb-nav .current {
  color: var(--ink-body);
}

.page-head h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--ink-title);
  letter-spacing: 0.02em;
  margin: 0 0 14px;
  line-height: 1.25;
}

.page-head .page-head-lead {
  font-size: 18px;
  color: var(--ink-body);
  max-width: 72ch;
  margin: 0;
  line-height: 1.75;
}

/* ---------- Eye Brow ---------- */
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent-teal);
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* ---------- Section Head ---------- */
.section-head {
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 650;
  color: var(--ink-title);
  letter-spacing: 0.01em;
  margin: 0 0 12px;
  line-height: 1.3;
}

.section-head p {
  font-size: 16px;
  color: var(--ink-muted);
  max-width: 72ch;
  margin: 0;
}

/* ---------- 图文 Intro ---------- */
.intro-section {
  padding: 72px 0 48px;
}

.intro-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 56px;
  align-items: center;
}

.intro-text h2 {
  font-size: 30px;
  font-weight: 650;
  color: var(--ink-title);
  margin: 0 0 20px;
  line-height: 1.3;
}

.intro-text p {
  font-size: 16px;
  color: var(--ink-body);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 50ch;
}

.intro-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glass);
}

.intro-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: transform 400ms ease;
}

.intro-media:hover img {
  transform: scale(1.05);
}

.float-card {
  position: absolute;
  bottom: 20px;
  left: 20px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(13, 21, 38, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 12px 18px;
  color: var(--ink-title);
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.float-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 8px rgba(53, 208, 192, 0.6);
  flex-shrink: 0;
}

/* ---------- 要点卡 ---------- */
.features-section {
  padding: 72px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover), 0 0 0 1px rgba(53, 208, 192, 0.35);
  border-color: rgba(53, 208, 192, 0.35);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(53, 208, 192, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-teal);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink-title);
  margin: 0 0 8px;
  line-height: 1.4;
}

.feature-card p {
  font-size: 15px;
  color: var(--ink-muted);
  margin: 0;
  line-height: 1.6;
}

/* ---------- FAQ ---------- */
.faq-section {
  padding: 72px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.faq-list {
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:has(.accordion-button:not(.collapsed)) {
  border-color: rgba(53, 208, 192, 0.4);
  box-shadow: inset 2px 0 0 var(--accent-teal);
}

.accordion-button {
  background: transparent;
  color: var(--ink-title);
  font-size: 16px;
  font-weight: 500;
  padding: 18px 20px;
  border: none;
  box-shadow: none;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}

.accordion-button::after {
  content: '';
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-muted);
  border-bottom: 2px solid var(--ink-muted);
  transform: rotate(45deg);
  transition: transform var(--transition), border-color var(--transition);
  flex-shrink: 0;
  background: none;
}

.accordion-button.collapsed::after {
  transform: rotate(-45deg);
}

.accordion-button:not(.collapsed) {
  background: rgba(53, 208, 192, 0.05);
  color: var(--accent-teal);
}

.accordion-button:not(.collapsed)::after {
  border-color: var(--accent-teal);
  transform: rotate(45deg);
}

.accordion-button:focus-visible {
  box-shadow: none;
  outline: 2px solid var(--accent-teal);
  outline-offset: -2px;
}

.accordion-body {
  padding: 0 20px 20px;
  color: var(--ink-body);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid transparent;
}

/* ---------- CTA ---------- */
.cta-section {
  padding: 72px 0;
  background: var(--bg-panel);
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(148, 184, 255, 0.08);
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(244, 183, 64, 0.055), transparent 68%);
  pointer-events: none;
}

.cta-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}

.cta-inner h2 {
  font-size: 30px;
  font-weight: 650;
  color: var(--ink-title);
  margin: 0 0 14px;
  line-height: 1.3;
}

.cta-inner > p {
  color: var(--ink-body);
  font-size: 16px;
  margin: 0 0 32px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid rgba(148, 184, 255, 0.1);
  padding: 56px 0 28px;
  margin-left: var(--sidebar-w);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-title);
  margin: 0 0 14px;
}

.footer-brand-name svg {
  width: 24px;
  height: 24px;
  color: var(--accent-teal);
  flex-shrink: 0;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.75;
  max-width: 32ch;
  margin: 0;
}

.footer-col-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-title);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

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

.footer-links a {
  color: var(--ink-body);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent-teal);
  text-decoration: none;
}

.footer-info p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.75;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--ink-muted);
  text-align: center;
  line-height: 1.6;
}

/* ---------- 响应式 ---------- */
@media (min-width: 992px) and (max-width: 1199.98px) {
  :root {
    --sidebar-w: var(--sidebar-w-md);
  }

  .sidebar-brand span {
    font-size: 18px;
  }

  .page-container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

@media (max-width: 991.98px) {
  .main-content {
    margin-left: 0;
    padding-top: 56px;
  }

  .site-footer {
    margin-left: 0;
  }

  .page-container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-head {
    padding: 48px 0 40px;
  }

  .intro-section,
  .features-section,
  .faq-section,
  .cta-section {
    padding: 56px 0;
  }
}

@media (max-width: 767.98px) {
  .page-container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-head h1 {
    font-size: 32px;
  }

  .page-head .page-head-lead {
    font-size: 16px;
  }

  .section-head h2,
  .intro-text h2,
  .cta-inner h2 {
    font-size: 24px;
  }

  .intro-media img {
    min-height: 240px;
  }

  .float-card {
    bottom: 14px;
    left: 14px;
    padding: 10px 14px;
    font-size: 13px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn-primary-glow,
  .cta-buttons .btn-glass {
    width: 100%;
    max-width: 320px;
  }
}

@media (max-width: 575.98px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    font-size: 12px;
    padding-top: 16px;
  }

  .site-footer {
    padding-top: 40px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: opacity 120ms ease !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }

  .btn-primary-glow,
  .btn-glass,
  .feature-card {
    transform: none !important;
  }

  .intro-media img {
    transform: none !important;
  }
}