:root {
      --theme: #0B3D91;
      --theme-dark: #06265c;
      --ink: #172033;
      --muted: #6d7789;
      --line: #e7ebf2;
      --surface: #ffffff;
      --soft: #f4f7fb;
      --accent: #56c7e8;
      --shadow: 0 18px 50px rgba(11, 61, 145, .10);
      --radius: 18px;
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      color: var(--ink);
      background: #f7f9fc;
      font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button { font: inherit; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

    .topbar {
      color: #d9e9ff;
      background: #071936;
      font-size: 13px;
    }
    .topbar .container,
    .topbar-links {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .topbar .container { min-height: 36px; }
    .topbar-links { justify-content: flex-end; }
    .topbar a { color: #d9e9ff; opacity: .9; }

    .header {
      position: relative;
      z-index: 20;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 5px 20px rgba(10, 31, 70, .04);
    }
    .header-inner {
      min-height: 78px;
      display: flex;
      align-items: center;
      gap: 30px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-width: 190px;
      color: var(--theme-dark);
      font-size: 18px;
      font-weight: 800;
      white-space: nowrap;
    }
    .logo img { width: 34px; height: 34px; 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: block;
      padding: 26px 13px;
      color: #29354a;
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
    }
    .nav-link:hover,
    .nav-link:focus-visible { color: var(--theme); }
    .has-arrow::after {
      content: "⌄";
      margin-left: 6px;
      color: var(--muted);
    }
    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: calc(100% - 1px);
      left: 50%;
      width: 270px;
      padding: 16px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 0 0 14px 14px;
      box-shadow: var(--shadow);
      opacity: 0;
      visibility: hidden;
      transform: translate(-50%, 8px);
      transition: .2s ease;
    }
    .mega-menu { width: 720px; padding: 24px; }
    .nav-item:hover > .dropdown-panel,
    .nav-item:focus-within > .dropdown-panel,
    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .mega-menu {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
    }
    .dropdown-panel a {
      display: block;
      padding: 9px 6px;
      border-bottom: 1px solid var(--line);
      font-size: 14px;
    }
    .dropdown-panel a:last-child { border-bottom: 0; }
    .mega-heading {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 14px;
      margin-bottom: 16px;
    }
    .mega-heading strong { color: var(--theme-dark); }
    .mega-heading span { color: var(--muted); font-size: 12px; }
    .mega-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }
    .mega-card {
      min-height: 118px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: #fbfcff;
    }
    .mega-card:hover { border-color: var(--accent); background: #f2fbff; }
    .mega-card img { width: 30px; height: 30px; margin-bottom: 7px; object-fit: contain; }
    .mega-card strong,
    .mega-card small { display: block; }
    .mega-card strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
    .mega-card small {
      margin-top: 3px;
      color: var(--muted);
      font-size: 11px;
      line-height: 1.45;
    }
    .mega-footer {
      display: block;
      margin-top: 16px;
      padding-top: 13px;
      border-top: 1px solid var(--line);
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }
    .mega-footer a { display: inline-block; margin: 0 12px 5px 0; }
    .header-btns {
      display: flex;
      align-items: center;
      gap: 12px;
      white-space: nowrap;
    }
    .member-link {
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }
    .account-link {
      padding: 9px 17px;
      color: #fff;
      background: var(--theme);
      border-radius: 8px;
      font-size: 13px;
      font-weight: 700;
    }
    .hamburger {
      display: none;
      width: 42px;
      height: 42px;
      padding: 9px;
      border: 0;
      background: transparent;
      cursor: pointer;
    }
    .hamburger span {
      display: block;
      width: 23px;
      height: 2px;
      margin: 5px auto;
      background: var(--ink);
      transition: .2s;
    }
    .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: 40;
      background: rgba(4, 16, 39, .48);
      opacity: 0;
      visibility: hidden;
      transition: .25s;
    }
    .drawer-overlay.open { opacity: 1; visibility: visible; }
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      z-index: 50;
      width: min(380px, 88vw);
      height: 100vh;
      overflow-y: auto;
      background: #fff;
      transform: translateX(100%);
      transition: .3s ease;
    }
    .mobile-drawer.open { transform: translateX(0); }
    .drawer-head {
      display: flex;
      align-items: center;
      gap: 15px;
      padding: 22px 20px;
      color: #fff;
      background: var(--theme-dark);
    }
    .drawer-head strong { flex: 1; }
    .drawer-head a { padding: 5px 12px; border: 1px solid rgba(255,255,255,.5); border-radius: 6px; font-size: 13px; }
    .drawer-close { border: 0; color: #fff; background: transparent; font-size: 28px; cursor: pointer; }
    .drawer-menu { padding: 12px 20px 30px; }
    .drawer-link,
    .drawer-toggle {
      display: block;
      width: 100%;
      padding: 14px 0;
      border: 0;
      border-bottom: 1px solid var(--line);
      color: var(--ink);
      background: transparent;
      text-align: left;
      cursor: pointer;
      font-weight: 700;
    }
    .drawer-toggle::after { content: "+"; float: right; color: var(--theme); font-size: 20px; }
    .drawer-toggle.active::after { content: "−"; }
    .drawer-submenu { display: none; padding: 5px 0 8px 14px; }
    .drawer-submenu.open { display: block; }
    .drawer-submenu a { display: block; padding: 7px 0; color: var(--muted); font-size: 14px; }

    .tag-page { padding: 64px 0 90px; }
    .tag-hero {
      position: relative;
      overflow: hidden;
      padding: 46px clamp(24px, 5vw, 70px);
      border-radius: 26px;
      color: #fff;
      background:
        radial-gradient(circle at 85% 15%, rgba(86,199,232,.34), transparent 28%),
        linear-gradient(130deg, #071936 0%, #0b3d91 68%, #12568f 100%);
      box-shadow: 0 22px 55px rgba(11, 61, 145, .2);
    }
    .tag-hero::after {
      content: "";
      position: absolute;
      width: 230px;
      height: 230px;
      right: -65px;
      bottom: -110px;
      border: 1px solid rgba(255,255,255,.22);
      border-radius: 50%;
      box-shadow: 0 0 0 25px rgba(255,255,255,.05), 0 0 0 50px rgba(255,255,255,.04);
    }
    .eyebrow {
      position: relative;
      z-index: 1;
      margin: 0 0 10px;
      color: #9fe6fa;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .12em;
    }
    .tag-hero h1 {
      position: relative;
      z-index: 1;
      margin: 0;
      font-size: clamp(32px, 5vw, 58px);
      line-height: 1.18;
    }
    .tag-hero p {
      position: relative;
      z-index: 1;
      max-width: 680px;
      margin: 16px 0 0;
      color: #dcecff;
      font-size: 16px;
    }
    .tag-stat {
      position: relative;
      z-index: 1;
      display: inline-flex;
      align-items: baseline;
      gap: 8px;
      margin-top: 24px;
      padding: 10px 15px;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 10px;
      background: rgba(255,255,255,.09);
      font-size: 13px;
    }
    .tag-stat strong { color: #9fe6fa; font-size: 24px; }
    .tag-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      margin: 34px 0 18px;
    }
    .tag-toolbar h2 { margin: 0; font-size: 22px; }
    .tag-toolbar span { color: var(--muted); font-size: 13px; }
    .tag-article-list { display: grid; gap: 16px; }
    .tag-article-card {
      display: grid;
      grid-template-columns: 245px 1fr;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface);
      box-shadow: 0 8px 25px rgba(20, 43, 82, .04);
      transition: transform .2s, box-shadow .2s;
    }
    .tag-article-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow);
    }
    .tag-article-card > img {
      width: 100%;
      height: 100%;
      min-height: 178px;
      object-fit: cover;
      background: #dfe8f5;
    }
    .tag-article-body { padding: 22px 25px; }
    .tag-label {
      display: inline-block;
      margin-bottom: 7px;
      color: var(--theme);
      font-size: 12px;
      font-weight: 800;
    }
    .tag-article-body h3 { margin: 0; font-size: 20px; line-height: 1.4; }
    .tag-article-body h3 a:hover { color: var(--theme); }
    .tag-summary {
      display: -webkit-box;
      overflow: hidden;
      margin: 9px 0 14px;
      color: var(--muted);
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }
    .tag-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px 16px;
      color: #8993a3;
      font-size: 12px;
    }
    .tag-meta .tags { color: var(--theme); }
    .tag-read {
      display: inline-flex;
      margin-top: 13px;
      color: var(--theme);
      font-size: 13px;
      font-weight: 800;
    }
    .pagination {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 34px;
    }
    .pagination a {
      min-width: 38px;
      padding: 6px 11px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      color: var(--muted);
      text-align: center;
      font-size: 13px;
    }
    .pagination a:hover,
    .pagination a.active { border-color: var(--theme); color: #fff; background: var(--theme); }

    .footer {
      padding: 55px 0 20px;
      color: #c2d0e7;
      background: #071936;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
      gap: 35px;
      padding-bottom: 38px;
    }
    .footer h3 { margin: 0 0 14px; color: #fff; font-size: 15px; }
    .footer-brand strong { color: #fff; font-size: 19px; }
    .footer p { margin: 12px 0 0; color: #9eb1cc; font-size: 13px; }
    .footer-grid > div:not(.footer-brand) a,
    .footer-grid > div:not(.footer-brand) span {
      display: block;
      margin: 7px 0;
      color: #b7c7df;
      font-size: 13px;
    }
    .footer-grid a:hover { color: #8de5fb !important; }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-top: 18px;
      border-top: 1px solid rgba(255,255,255,.12);
      color: #8fa4c1;
      font-size: 12px;
    }

    @media (max-width: 960px) {
      .main-nav { display: none; }
      .hamburger { display: block; }
      .logo { min-width: 0; }
      .mega-menu { width: min(720px, calc(100vw - 40px)); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 620px) {
      .container { width: min(100% - 28px, 1180px); }
      .topbar .container { align-items: flex-start; flex-direction: column; gap: 0; padding: 7px 0; }
      .topbar-links { justify-content: flex-start; flex-wrap: wrap; gap: 4px 12px; }
      .header-inner { min-height: 66px; gap: 10px; }
      .member-link { display: none; }
      .account-link { padding: 7px 11px; }
      .tag-page { padding: 30px 0 60px; }
      .tag-hero { padding: 34px 24px; border-radius: 18px; }
      .tag-hero p { font-size: 14px; }
      .tag-toolbar { align-items: flex-start; flex-direction: column; gap: 3px; margin-top: 25px; }
      .tag-article-card { display: block; }
      .tag-article-card > img { height: 185px; min-height: 0; }
      .tag-article-body { padding: 18px; }
      .tag-article-body h3 { font-size: 18px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px 16px; }
      .footer-brand { grid-column: 1 / -1; }
      .footer-bottom { align-items: flex-start; flex-direction: column; gap: 6px; }
    }