:root {
      --bg-primary: #050a0f;
      --bg-secondary: #090f18;
      --bg-card: #0d1520;
      --bg-card-hover: #111d2e;
      --accent-cyan: #00d4ff;
      --accent-green: #00ff88;
      --accent-red: #ff3366;
      --accent-gold: #f5c842;
      --accent-purple: #7b5ea7;
      --text-primary: #e8f4fd;
      --text-secondary: #8aa8c8;
      --text-muted: #4a6280;
      --border: rgba(0, 212, 255, 0.15);
      --border-bright: rgba(0, 212, 255, 0.4);
      --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
      --glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
      --glow-red: 0 0 20px rgba(255, 51, 102, 0.3);
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: 'Noto Sans SC', sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      overflow-x: hidden;
      line-height: 1.6;
    }

    /* 动态背景网格 */
    body::before {
      content: '';
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background-image:
        linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
      background-size: 50px 50px;
      pointer-events: none;
      z-index: 0;
    }

    /* ===== 导航栏 ===== */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 1000;
      background: rgba(5, 10, 15, 0.92);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border);
      padding: 0 5%;
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      max-width: 1280px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }

    .logo-icon {
      width: 36px; height: 36px;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: var(--glow-cyan);
    }

    .logo-text {
      font-family: 'Orbitron', monospace;
      font-size: 16px;
      font-weight: 700;
      color: var(--accent-cyan);
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color 0.2s;
    }

    .nav-links a:hover { color: var(--accent-cyan); }

    .nav-cta {
      background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
      color: #000 !important;
      padding: 8px 20px;
      border-radius: 6px;
      font-weight: 700 !important;
      font-size: 13px !important;
    }

    /* ===== 英雄区 ===== */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding: 100px 5% 60px;
      overflow: hidden;
    }

    .hero-bg {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background:
        radial-gradient(ellipse 60% 50% at 70% 50%, rgba(0,212,255,0.06) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 20% 80%, rgba(0,255,136,0.04) 0%, transparent 60%);
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 1280px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      width: 100%;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0,212,255,0.1);
      border: 1px solid rgba(0,212,255,0.3);
      border-radius: 20px;
      padding: 4px 14px;
      font-size: 12px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
      font-family: 'JetBrains Mono', monospace;
    }

    .hero-badge::before {
      content: '';
      width: 6px; height: 6px;
      background: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }

    h1 {
      font-family: 'Orbitron', monospace;
      font-size: clamp(28px, 4vw, 52px);
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 16px;
      color: var(--text-primary);
    }

    h1 .highlight {
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      line-height: 1.8;
      max-width: 480px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--accent-cyan), #0088bb);
      color: #000;
      font-weight: 700;
      font-size: 15px;
      padding: 14px 28px;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: none;
      transition: transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 20px rgba(0,212,255,0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0,212,255,0.5);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-primary);
      font-weight: 600;
      font-size: 15px;
      padding: 13px 24px;
      border-radius: 8px;
      text-decoration: none;
      border: 1px solid var(--border-bright);
      cursor: pointer;
      transition: all 0.2s;
    }

    .btn-secondary:hover {
      background: rgba(0,212,255,0.08);
      border-color: var(--accent-cyan);
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
    }

    .stat-item { text-align: left; }

    .stat-value {
      font-family: 'Orbitron', monospace;
      font-size: 24px;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    .stat-label {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* ===== 模拟器主界面 ===== */
    .simulator-panel {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0,0,0,0.5), var(--glow-cyan);
      animation: floatUp 0.8s ease-out;
    }

    @keyframes floatUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .sim-header {
      background: var(--bg-secondary);
      padding: 14px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border);
    }

    .sim-title {
      font-family: 'JetBrains Mono', monospace;
      font-size: 13px;
      color: var(--accent-cyan);
      font-weight: 600;
    }

    .sim-controls {
      display: flex;
      gap: 6px;
    }

    .dot {
      width: 10px; height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #ff5f57; }
    .dot-yellow { background: #ffbd2e; }
    .dot-green { background: #28c840; }

    /* 价格显示 */
    .price-display {
      padding: 16px 20px;
      background: linear-gradient(135deg, rgba(0,212,255,0.05), transparent);
      border-bottom: 1px solid var(--border);
    }

    .price-row {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
    }

    .price-main {
      font-family: 'Orbitron', monospace;
      font-size: 28px;
      font-weight: 700;
      color: var(--accent-green);
    }

    .price-change {
      font-size: 13px;
      color: var(--accent-green);
      font-family: 'JetBrains Mono', monospace;
    }

    .price-label {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* 模拟K线图 */
    .chart-area {
      padding: 12px 16px;
      height: 140px;
      position: relative;
      overflow: hidden;
    }

    .chart-svg { width: 100%; height: 100%; }

    /* 交易控制面板 */
    .trade-panel {
      padding: 16px 20px;
      border-top: 1px solid var(--border);
    }

    .trade-tabs {
      display: flex;
      gap: 0;
      margin-bottom: 14px;
      background: var(--bg-secondary);
      border-radius: 6px;
      padding: 3px;
    }

    .trade-tab {
      flex: 1;
      padding: 7px;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      border-radius: 4px;
      transition: all 0.2s;
      color: var(--text-muted);
    }

    .trade-tab.long.active {
      background: rgba(0,255,136,0.2);
      color: var(--accent-green);
    }

    .trade-tab.short.active {
      background: rgba(255,51,102,0.2);
      color: var(--accent-red);
    }

    .sim-input-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-bottom: 10px;
    }

    .sim-input-group label {
      font-size: 10px;
      color: var(--text-muted);
      display: block;
      margin-bottom: 4px;
      font-family: 'JetBrains Mono', monospace;
    }

    .sim-input {
      width: 100%;
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 5px;
      padding: 7px 10px;
      color: var(--text-primary);
      font-size: 13px;
      font-family: 'JetBrains Mono', monospace;
      outline: none;
      transition: border-color 0.2s;
    }

    .sim-input:focus { border-color: var(--accent-cyan); }

    .leverage-btns {
      display: flex;
      gap: 5px;
      margin-bottom: 12px;
    }

    .lev-btn {
      flex: 1;
      padding: 5px;
      text-align: center;
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 4px;
      cursor: pointer;
      font-size: 11px;
      color: var(--text-secondary);
      font-family: 'JetBrains Mono', monospace;
      transition: all 0.2s;
    }

    .lev-btn.active, .lev-btn:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      background: rgba(0,212,255,0.08);
    }

    .btn-trade {
      width: 100%;
      padding: 11px;
      border-radius: 6px;
      border: none;
      font-size: 14px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.2s;
      font-family: 'Noto Sans SC', sans-serif;
    }

    .btn-long {
      background: linear-gradient(135deg, #00cc66, #008844);
      color: #fff;
      box-shadow: 0 4px 15px rgba(0,255,136,0.25);
    }

    .btn-long:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,255,136,0.4); }

    .btn-short {
      background: linear-gradient(135deg, #cc2244, #881133);
      color: #fff;
      box-shadow: 0 4px 15px rgba(255,51,102,0.25);
    }

    /* ===== 特性区 ===== */
    section { position: relative; z-index: 1; }

    .section-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 80px 5%;
    }

    .section-tag {
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      color: var(--accent-cyan);
      letter-spacing: 3px;
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .section-title {
      font-family: 'Orbitron', monospace;
      font-size: clamp(22px, 3vw, 36px);
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-primary);
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 560px;
      line-height: 1.8;
      margin-bottom: 48px;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 28px 24px;
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .feature-card:hover {
      border-color: var(--border-bright);
      background: var(--bg-card-hover);
      transform: translateY(-4px);
      box-shadow: 0 12px 40px rgba(0,0,0,0.4), var(--glow-cyan);
    }

    .feature-card:hover::before { opacity: 1; }

    .feature-icon {
      width: 48px; height: 48px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
    }

    .icon-cyan { background: rgba(0,212,255,0.12); }
    .icon-green { background: rgba(0,255,136,0.12); }
    .icon-gold { background: rgba(245,200,66,0.12); }
    .icon-red { background: rgba(255,51,102,0.12); }
    .icon-purple { background: rgba(123,94,167,0.12); }
    .icon-blue { background: rgba(50,100,255,0.12); }

    .feature-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-primary);
    }

    .feature-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== 主模拟器区域 ===== */
    .simulator-section {
      background: linear-gradient(180deg, transparent, rgba(0,212,255,0.02), transparent);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .sim-layout {
      display: grid;
      grid-template-columns: 1fr 320px;
      gap: 24px;
      align-items: start;
    }

    .chart-container {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
    }

    .chart-toolbar {
      padding: 14px 20px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .coin-selector {
      display: flex;
      gap: 8px;
    }

    .coin-btn {
      padding: 5px 14px;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      font-family: 'JetBrains Mono', monospace;
    }

    .coin-btn.active, .coin-btn:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      background: rgba(0,212,255,0.08);
    }

    .timeframe-btns {
      display: flex;
      gap: 4px;
    }

    .tf-btn {
      padding: 4px 10px;
      border-radius: 4px;
      border: none;
      background: transparent;
      color: var(--text-muted);
      font-size: 12px;
      cursor: pointer;
      transition: all 0.2s;
      font-family: 'JetBrains Mono', monospace;
    }

    .tf-btn.active, .tf-btn:hover {
      background: rgba(0,212,255,0.1);
      color: var(--accent-cyan);
    }

    #mainChart {
      width: 100%;
      height: 340px;
      display: block;
    }

    /* 订单面板 */
    .order-panel {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
    }

    .order-header {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
      background: var(--bg-secondary);
    }

    .order-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-primary);
    }

    .balance-display {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
    }

    .balance-label {
      font-size: 11px;
      color: var(--text-muted);
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 4px;
    }

    .balance-value {
      font-family: 'Orbitron', monospace;
      font-size: 22px;
      font-weight: 700;
      color: var(--accent-gold);
    }

    .balance-sub {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    .order-form {
      padding: 16px 20px;
    }

    .form-group {
      margin-bottom: 12px;
    }

    .form-label {
      font-size: 11px;
      color: var(--text-muted);
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 5px;
      display: block;
    }

    .form-input {
      width: 100%;
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 9px 12px;
      color: var(--text-primary);
      font-size: 14px;
      font-family: 'JetBrains Mono', monospace;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-input:focus { border-color: var(--accent-cyan); }

    .direction-tabs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-bottom: 14px;
    }

    .dir-btn {
      padding: 10px;
      border-radius: 6px;
      border: 2px solid transparent;
      font-size: 14px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.2s;
    }

    .dir-long {
      background: rgba(0,204,102,0.12);
      color: var(--accent-green);
      border-color: rgba(0,204,102,0.3);
    }

    .dir-long.active, .dir-long:hover {
      background: rgba(0,204,102,0.25);
      border-color: var(--accent-green);
    }

    .dir-short {
      background: rgba(255,51,102,0.12);
      color: var(--accent-red);
      border-color: rgba(255,51,102,0.3);
    }

    .dir-short.active, .dir-short:hover {
      background: rgba(255,51,102,0.25);
      border-color: var(--accent-red);
    }

    .lev-slider-wrap {
      margin-bottom: 14px;
    }

    .lev-display {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 6px;
    }

    .lev-value {
      font-family: 'Orbitron', monospace;
      font-size: 20px;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    .lev-risk {
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 10px;
      background: rgba(245,200,66,0.15);
      color: var(--accent-gold);
    }

    input[type="range"] {
      width: 100%;
      -webkit-appearance: none;
      height: 4px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--accent-cyan) 50%, rgba(255,255,255,0.1) 50%);
      outline: none;
    }

    input[type="range"]::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 16px; height: 16px;
      border-radius: 50%;
      background: var(--accent-cyan);
      cursor: pointer;
      box-shadow: 0 0 8px rgba(0,212,255,0.6);
    }

    .profit-preview {
      background: var(--bg-secondary);
      border-radius: 8px;
      padding: 12px;
      margin-bottom: 14px;
      border: 1px solid var(--border);
    }

    .preview-row {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      margin-bottom: 5px;
    }

    .preview-row:last-child { margin-bottom: 0; }

    .preview-label { color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
    .preview-value { color: var(--text-primary); font-family: 'JetBrains Mono', monospace; font-weight: 600; }
    .preview-value.green { color: var(--accent-green); }
    .preview-value.red { color: var(--accent-red); }

    .submit-order {
      width: 100%;
      padding: 13px;
      border-radius: 8px;
      border: none;
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.2s;
      font-family: 'Noto Sans SC', sans-serif;
      letter-spacing: 1px;
    }

    /* 持仓列表 */
    .positions-section {
      margin-top: 24px;
    }

    .positions-table {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
    }

    .table-header {
      padding: 14px 20px;
      border-bottom: 1px solid var(--border);
      background: var(--bg-secondary);
      font-size: 14px;
      font-weight: 700;
      color: var(--text-primary);
    }

    table {
      width: 100%;
      border-collapse: collapse;
    }

    th {
      padding: 10px 16px;
      text-align: left;
      font-size: 11px;
      color: var(--text-muted);
      font-family: 'JetBrains Mono', monospace;
      font-weight: 600;
      border-bottom: 1px solid var(--border);
      white-space: nowrap;
    }

    td {
      padding: 12px 16px;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.03);
      font-family: 'JetBrains Mono', monospace;
    }

    tr:last-child td { border-bottom: none; }
    tr:hover td { background: rgba(0,212,255,0.02); }

    .position-coin { color: var(--text-primary); font-weight: 600; }
    .tag-long { color: var(--accent-green); font-weight: 700; }
    .tag-short { color: var(--accent-red); font-weight: 700; }
    .profit-positive { color: var(--accent-green); }
    .profit-negative { color: var(--accent-red); }

    .close-btn {
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(255,51,102,0.4);
      background: rgba(255,51,102,0.1);
      color: var(--accent-red);
      font-size: 11px;
      cursor: pointer;
      transition: all 0.2s;
    }

    .close-btn:hover { background: rgba(255,51,102,0.25); }

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

    .faq-list { max-width: 800px; }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover { border-color: var(--border-bright); }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-primary);
      background: var(--bg-card);
      user-select: none;
    }

    .faq-icon {
      color: var(--accent-cyan);
      font-size: 20px;
      transition: transform 0.3s;
      flex-shrink: 0;
    }

    .faq-item.open .faq-icon { transform: rotate(45deg); }

    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      background: var(--bg-card);
    }

    .faq-item.open .faq-answer { display: block; }

    /* ===== SEO文章区 ===== */
    .seo-section { background: var(--bg-primary); }

    .article-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 40px;
    }

    .article-content h2 {
      font-family: 'Orbitron', monospace;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
      margin-top: 28px;
    }

    .article-content h2:first-child { margin-top: 0; }

    .article-content p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.9;
      margin-bottom: 14px;
    }

    .article-content ul {
      padding-left: 20px;
      margin-bottom: 14px;
    }

    .article-content li {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 6px;
    }

    .article-sidebar {
      position: sticky;
      top: 80px;
    }

    .sidebar-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 20px;
    }

    .sidebar-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
      padding-bottom: 10px;
      border-bottom: 1px solid var(--border);
    }

    .sidebar-links {
      list-style: none;
    }

    .sidebar-links li {
      padding: 7px 0;
      border-bottom: 1px solid rgba(255,255,255,0.04);
    }

    .sidebar-links li:last-child { border-bottom: none; }

    .sidebar-links a {
      font-size: 13px;
      color: var(--text-secondary);
      text-decoration: none;
      transition: color 0.2s;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .sidebar-links a::before {
      content: '›';
      color: var(--accent-cyan);
    }

    .sidebar-links a:hover { color: var(--accent-cyan); }

    /* ===== 页脚 ===== */
    footer {
      background: var(--bg-secondary);
      border-top: 1px solid var(--border);
      padding: 48px 5% 24px;
    }

    .footer-inner {
      max-width: 1280px;
      margin: 0 auto;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-top: 12px;
    }

    .footer-col h4 {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
    }

    .footer-col ul { list-style: none; }

    .footer-col li { margin-bottom: 8px; }

    .footer-col a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-col a:hover { color: var(--accent-cyan); }

    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-copy {
      font-size: 12px;
      color: var(--text-muted);
    }

    .disclaimer {
      font-size: 11px;
      color: var(--text-muted);
      max-width: 600px;
      text-align: right;
    }

    /* ===== 通知 ===== */
    .toast {
      position: fixed;
      bottom: 24px;
      right: 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-bright);
      border-radius: 10px;
      padding: 14px 20px;
      z-index: 9999;
      transform: translateX(150%);
      transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
      max-width: 320px;
      box-shadow: 0 8px 30px rgba(0,0,0,0.5), var(--glow-cyan);
    }

    .toast.show { transform: translateX(0); }

    .toast-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 4px;
    }

    .toast-msg {
      font-size: 12px;
      color: var(--text-secondary);
      font-family: 'JetBrains Mono', monospace;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .hero-content { grid-template-columns: 1fr; }
      .simulator-panel { display: none; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .sim-layout { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .features-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .hero-stats { flex-wrap: wrap; gap: 20px; }
    }

    /* 滚动进入动画 */
    .fade-in {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }