:root {
      --theme: #0B3D91;
      --ink: #142033;
      --muted: #64748b;
      --line: #dbe3ee;
      --paper: #f5f8fc;
      --white: #ffffff;
      --accent: #c53b32;
      --shadow: 0 16px 45px rgba(20, 32, 51, .10);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; }
    button { font: inherit; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

    .topbar {
      background: #10233f;
      color: #dbe7f5;
      font-size: 13px;
    }
    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .topbar-contact {
      display: flex;
      align-items: center;
      gap: 22px;
    }
    .topbar a:hover { color: #fff; }

    .header {
      position: relative;
      z-index: 20;
      background: var(--white);
      border-bottom: 1px solid var(--line);
    }
    .header-inner {
      min-height: 78px;
      display: flex;
      align-items: center;
      gap: 34px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: max-content;
      font-weight: 800;
      font-size: 19px;
      color: var(--theme);
    }
    .logo img {
      width: 38px;
      height: 38px;
      object-fit: contain;
    }
    .main-nav { flex: 1; }
    .nav-list {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      padding: 0;
      margin: 0;
      list-style: none;
    }
    .nav-item { position: relative; }
    .nav-link {
      display: inline-flex;
      align-items: center;
      min-height: 78px;
      padding: 0 15px;
      color: #34445a;
      font-size: 15px;
      white-space: nowrap;
    }
    .nav-link:hover,
    .nav-item:focus-within > .nav-link { color: var(--theme); }
    .has-arrow::after {
      content: "";
      width: 6px;
      height: 6px;
      margin: -3px 0 0 9px;
      border-right: 1px solid currentColor;
      border-bottom: 1px solid currentColor;
      transform: rotate(45deg);
    }
    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: calc(100% - 1px);
      left: 50%;
      width: 330px;
      padding: 22px;
      background: var(--white);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      opacity: 0;
      visibility: hidden;
      transform: translate(-50%, 8px);
      transition: .2s ease;
    }
    .mega-menu {
      width: min(900px, 90vw);
      padding: 28px;
    }
    .nav-item:hover > .dropdown-panel,
    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .dropdown-panel,
    .nav-item:focus-within > .mega-menu {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
    }
    .dropdown-panel::before,
    .mega-menu::before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: -12px;
      height: 12px;
    }
    .panel-title,
    .mega-section h3 {
      margin: 0 0 13px;
      font-size: 16px;
      color: var(--theme);
    }
    .dropdown-list,
    .mega-list {
      display: grid;
      gap: 8px;
    }
    .dropdown-list a,
    .mega-list > a {
      display: block;
      padding: 8px 0;
      color: #405067;
      border-bottom: 1px solid #edf1f6;
    }
    .dropdown-list a:hover,
    .mega-list > a:hover { color: var(--theme); }
    .mega-columns {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 28px;
    }
    .mega-section p {
      margin: 0 0 18px;
      color: var(--muted);
      font-size: 13px;
    }
    .mega-meta {
      display: block;
      color: #8a98aa;
      font-size: 11px;
      line-height: 1.5;
    }
    .broker-mega-card,
    .video-mega-card,
    .product-mega-card {
      display: flex !important;
      align-items: center;
      gap: 10px;
    }
    .broker-mega-card img,
    .video-mega-card img,
    .product-mega-card img {
      width: 32px;
      height: 32px;
      object-fit: cover;
      flex: 0 0 32px;
    }
    .mega-footer {
      display: inline-block;
      margin-top: 14px;
      color: var(--accent);
      font-weight: 700;
      font-size: 13px;
    }
    .header-btns {
      display: flex;
      align-items: center;
      gap: 13px;
      min-width: max-content;
    }
    .member-link {
      color: var(--theme);
      font-size: 14px;
      font-weight: 700;
    }
    .account-link {
      padding: 8px 14px;
      color: #fff;
      background: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }
    .hamburger {
      display: none;
      width: 42px;
      height: 42px;
      padding: 9px;
      border: 1px solid var(--line);
      background: #fff;
      cursor: pointer;
    }
    .hamburger span {
      display: block;
      height: 2px;
      margin: 5px 0;
      background: var(--theme);
      transition: .2s ease;
    }
    .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      z-index: 50;
      background: rgba(10, 23, 43, .48);
      opacity: 0;
      visibility: hidden;
      transition: .2s ease;
    }
    .drawer-overlay.open { opacity: 1; visibility: visible; }
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      z-index: 60;
      width: min(390px, 88vw);
      height: 100vh;
      overflow-y: auto;
      background: #fff;
      box-shadow: -18px 0 40px rgba(0,0,0,.15);
      transform: translateX(100%);
      transition: .25s ease;
    }
    .mobile-drawer.open { transform: translateX(0); }
    .drawer-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 22px;
      color: var(--theme);
      border-bottom: 1px solid var(--line);
      font-weight: 800;
    }
    .drawer-head a { color: var(--accent); }
    .drawer-close {
      width: 34px;
      height: 34px;
      border: 0;
      background: #eef3f9;
      color: var(--ink);
      cursor: pointer;
      font-size: 22px;
      line-height: 1;
    }
    .drawer-menu { padding: 12px 22px 32px; }
    .drawer-link,
    .drawer-toggle {
      display: block;
      width: 100%;
      padding: 14px 0;
      color: #34445a;
      text-align: left;
      border: 0;
      border-bottom: 1px solid #edf1f6;
      background: transparent;
      cursor: pointer;
    }
    .drawer-toggle::after {
      content: "+";
      float: right;
      color: var(--theme);
      font-size: 18px;
    }
    .drawer-toggle.active::after { content: "−"; }
    .drawer-submenu {
      display: none;
      padding: 4px 0 9px 16px;
      border-left: 2px solid #dce7f4;
    }
    .drawer-submenu.open { display: block; }
    .drawer-submenu a {
      display: block;
      padding: 8px 0;
      color: var(--muted);
      font-size: 14px;
    }

    .tool-detail-page {
      padding: 58px 0 76px;
    }
    .tool-detail-hero {
      display: grid;
      grid-template-columns: 1fr 280px;
      gap: 42px;
      align-items: center;
      padding: 42px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }
    .eyebrow {
      margin: 0 0 10px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 1px;
    }
    .tool-detail-hero h1 {
      margin: 0 0 13px;
      color: var(--ink);
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1.18;
    }
    .tool-intro {
      max-width: 700px;
      margin: 0;
      color: var(--muted);
      font-size: 17px;
    }
    .tool-icon-panel {
      min-height: 190px;
      display: grid;
      place-items: center;
      background: #edf3fa;
      border: 1px solid #d5e2f1;
    }
    .tool-icon-panel img {
      width: 108px;
      height: 108px;
      object-fit: contain;
    }
    .tool-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 24px;
      margin-top: 24px;
      color: var(--muted);
      font-size: 13px;
    }
    .tool-meta strong { color: var(--ink); }
    .tool-content-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 310px;
      gap: 28px;
      margin-top: 30px;
      align-items: start;
    }
    .content-panel,
    .related-tools {
      min-width: 0;
      background: #fff;
      border: 1px solid var(--line);
      padding: 30px;
    }
    .content-panel h2,
    .related-tools h2 {
      margin: 0 0 20px;
      color: var(--theme);
      font-size: 22px;
    }
    .tool-body {
      min-width: 0;
      max-width: 100%;
      overflow-x: auto;
      color: #405067;
    }
    .tool-body img,
    .tool-body video,
    .tool-body table {
      max-width: 100%;
    }
    .tool-body table { border-collapse: collapse; }
    .tool-body th,
    .tool-body td {
      padding: 8px 12px;
      border: 1px solid var(--line);
    }
    .tool-facts {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 28px;
      padding-top: 22px;
      border-top: 1px solid var(--line);
    }
    .tool-fact {
      padding: 13px;
      background: #f6f8fb;
    }
    .tool-fact span {
      display: block;
      color: var(--muted);
      font-size: 12px;
    }
    .tool-fact strong {
      display: block;
      margin-top: 3px;
      font-size: 14px;
    }
    .related-list { display: grid; gap: 16px; }
    .related-tool {
      display: grid;
      grid-template-columns: 46px 1fr;
      gap: 12px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--line);
    }
    .related-tool:last-child { border-bottom: 0; padding-bottom: 0; }
    .related-tool img {
      width: 46px;
      height: 46px;
      object-fit: contain;
      padding: 7px;
      background: #edf3fa;
    }
    .related-tool h3 {
      margin: 0 0 2px;
      color: var(--ink);
      font-size: 15px;
    }
    .related-tool p {
      margin: 0;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.55;
    }

    .footer {
      color: #c7d4e4;
      background: #10233f;
    }
    .footer-main {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 38px;
      padding: 52px 0 38px;
    }
    .footer h2,
    .footer h3 { margin: 0 0 15px; color: #fff; }
    .footer h2 { font-size: 21px; }
    .footer h3 { font-size: 15px; }
    .footer p { margin: 0; color: #aebed1; font-size: 13px; }
    .footer-links {
      display: grid;
      gap: 7px;
      padding: 0;
      margin: 0;
      list-style: none;
      font-size: 13px;
    }
    .footer-links a:hover { color: #fff; }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding: 17px 0;
      border-top: 1px solid rgba(255,255,255,.14);
      color: #93a8c0;
      font-size: 12px;
    }

    @media (max-width: 980px) {
      .header-inner { gap: 18px; }
      .nav-link { padding: 0 8px; }
      .header-btns { gap: 8px; }
      .member-link { display: none; }
      .mega-columns { grid-template-columns: 1fr 1fr; }
      .mega-section:last-child { grid-column: 1 / -1; }
      .tool-detail-hero { grid-template-columns: 1fr 210px; }
      .tool-content-grid { grid-template-columns: minmax(0, 1fr) 260px; }
    }

    @media (max-width: 760px) {
      .container { width: min(100% - 28px, 620px); }
      .topbar-inner { min-height: 34px; }
      .topbar-contact { gap: 10px; }
      .topbar-contact a:first-child { display: none; }
      .header-inner { min-height: 68px; }
      .main-nav { display: none; }
      .hamburger { display: block; }
      .account-link { display: none; }
      .tool-detail-page { padding: 28px 0 48px; }
      .tool-detail-hero {
        grid-template-columns: 1fr;
        gap: 25px;
        padding: 25px;
      }
      .tool-icon-panel { min-height: 145px; }
      .tool-icon-panel img { width: 78px; height: 78px; }
      .tool-intro { font-size: 15px; }
      .tool-content-grid { grid-template-columns: 1fr; }
      .content-panel,
      .related-tools { padding: 22px; }
      .footer-main { grid-template-columns: 1fr 1fr; gap: 28px 20px; padding: 38px 0 28px; }
      .footer-main section:first-child { grid-column: 1 / -1; }
      .footer-bottom { display: block; }
      .footer-bottom span { display: block; margin-top: 6px; }
      .mega-menu,
      .dropdown-panel { display: none !important; }
    }