/* ===== 全局重置 & 科技紫变量 ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --bg-primary: #0a0812;
      --bg-secondary: #110d20;
      --bg-card: rgba(30, 20, 55, 0.75);
      --border-glow: rgba(160, 80, 255, 0.25);
      --text-primary: #f0eaff;
      --text-secondary: #b8a8d8;
      --accent-purple: #a855f7;
      --accent-blue: #3b82f6;
      --accent-cyan: #22d3ee;
      --accent-violet: #8b5cf6;
      --glass-bg: rgba(16, 10, 30, 0.65);
      --glass-border: rgba(180, 140, 255, 0.08);
      --shadow-glow: 0 8px 40px rgba(120, 60, 255, 0.18);
      --radius-lg: 28px;
      --radius-md: 18px;
      --radius-sm: 12px;
      --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      padding: 0 20px;
    }

    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: var(--bg-primary);
    }
    ::-webkit-scrollbar-thumb {
      background: var(--accent-purple);
      border-radius: 12px;
      box-shadow: 0 0 16px var(--accent-purple);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== 导航 ===== */
    header {
      padding: 18px 0 12px;
      border-bottom: 1px solid rgba(180, 140, 255, 0.06);
      backdrop-filter: blur(14px);
      background: rgba(10, 8, 18, 0.8);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .logo {
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
    }

    .logo span {
      font-weight: 300;
      -webkit-text-fill-color: var(--text-secondary);
      background: none;
    }

    nav ul {
      display: flex;
      list-style: none;
      gap: 28px;
      flex-wrap: wrap;
    }

    nav a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition);
      position: relative;
    }

    nav a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-purple);
      transition: var(--transition);
      box-shadow: 0 0 14px var(--accent-purple);
    }

    nav a:hover {
      color: #fff;
    }
    nav a:hover::after {
      width: 100%;
    }

    /* ===== 内容隐藏/显示 ===== */
    .page-section {
      display: block;
    }
    .page-section.hidden {
      display: none;
    }

    /* ===== Hero / 首页 ===== */
    .hero {
      padding: 60px 0 30px;
      text-align: center;
      position: relative;
    }

    .hero h1 {
      font-size: clamp(2.4rem, 8vw, 4.2rem);
      font-weight: 700;
      letter-spacing: -1px;
      background: linear-gradient(135deg, #f0eaff 20%, var(--accent-cyan) 50%, var(--accent-purple) 85%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 16px;
      line-height: 1.1;
    }

    .hero p {
      font-size: clamp(1rem, 2vw, 1.25rem);
      color: var(--text-secondary);
      max-width: 640px;
      margin: 0 auto 32px;
    }

    .mode-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin: 32px 0 28px;
    }

    .mode-card {
      background: var(--glass-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 24px 18px 22px;
      text-align: center;
      transition: var(--transition);
      cursor: default;
      position: relative;
      overflow: hidden;
    }

    .mode-card::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle at center, rgba(120, 60, 255, 0.07), transparent 70%);
      opacity: 0;
      transition: var(--transition);
    }

    .mode-card:hover {
      transform: translateY(-6px);
      border-color: rgba(160, 80, 255, 0.35);
      box-shadow: var(--shadow-glow);
    }

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

    .mode-card .num {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent-cyan);
      letter-spacing: -0.5px;
    }

    .mode-card .type {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      margin: 6px 0 4px;
    }

    .mode-card .hot {
      font-size: 0.75rem;
      color: var(--text-secondary);
      opacity: 0.7;
    }

    .mode-card .badge {
      display: inline-block;
      background: rgba(160, 80, 255, 0.15);
      border: 1px solid rgba(160, 80, 255, 0.3);
      border-radius: 40px;
      padding: 2px 14px;
      font-size: 0.7rem;
      color: var(--accent-purple);
      margin-top: 10px;
      letter-spacing: 0.3px;
    }

    .mode-card .selected-check {
      margin-top: 12px;
      font-size: 1.2rem;
      opacity: 0;
      transition: var(--transition);
      color: var(--accent-cyan);
    }

    .mode-card.active .selected-check {
      opacity: 1;
    }

    .mode-card.active {
      border-color: var(--accent-purple);
      box-shadow: 0 0 50px rgba(120, 60, 255, 0.12);
    }

    .desc-block {
      text-align: center;
      margin: 10px 0 24px;
    }

    .desc-block .highlight {
      color: var(--accent-cyan);
      font-weight: 600;
    }

    .btn-start {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
      border: none;
      padding: 14px 44px;
      border-radius: 60px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 0 40px rgba(120, 60, 255, 0.25);
      text-decoration: none;
      font-family: inherit;
    }

    .btn-start:hover {
      transform: scale(1.03);
      box-shadow: 0 0 60px rgba(120, 60, 255, 0.4);
    }

    .btn-start svg {
      width: 20px;
      height: 20px;
      transition: var(--transition);
    }

    .btn-start:hover svg {
      transform: translateX(6px);
    }

    .btn-wrap {
      text-align: center;
      margin: 12px 0 48px;
    }

    /* ===== 测试区域 ===== */
    #testSection {
      padding: 40px 0 60px;
    }

    .test-container {
      max-width: 720px;
      margin: 0 auto;
      background: var(--glass-bg);
      backdrop-filter: blur(10px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      box-shadow: var(--shadow-glow);
    }

    .progress-wrap {
      width: 100%;
      height: 4px;
      background: rgba(255,255,255,0.06);
      border-radius: 4px;
      margin-bottom: 24px;
      overflow: hidden;
    }

    .progress-bar {
      height: 100%;
      width: 0%;
      background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
      border-radius: 4px;
      transition: width 0.4s ease;
    }

    .question-counter {
      text-align: right;
      font-size: 0.85rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .question-text {
      font-size: 1.3rem;
      font-weight: 500;
      margin-bottom: 28px;
      line-height: 1.5;
      min-height: 4rem;
    }

    .options-grid {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .option-btn {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      padding: 14px 20px;
      color: var(--text-primary);
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      text-align: left;
      font-family: inherit;
      backdrop-filter: blur(4px);
    }

    .option-btn:hover {
      background: rgba(160, 80, 255, 0.08);
      border-color: var(--accent-purple);
    }

    .option-btn.selected {
      background: rgba(160, 80, 255, 0.15);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.08);
    }

    .option-btn .label {
      font-weight: 500;
      color: var(--accent-cyan);
      margin-right: 12px;
    }

    .btn-next {
      margin-top: 28px;
      padding: 12px 36px;
      background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
      border: none;
      border-radius: 60px;
      color: #fff;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      font-family: inherit;
      box-shadow: 0 0 30px rgba(120, 60, 255, 0.15);
      float: right;
    }

    .btn-next:hover {
      transform: scale(1.02);
      box-shadow: 0 0 50px rgba(120, 60, 255, 0.3);
    }

    .btn-next:disabled {
      opacity: 0.4;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .clearfix::after {
      content: "";
      display: table;
      clear: both;
    }

    /* ===== 结果区域 ===== */
    #resultSection {
      padding: 40px 0 60px;
    }

    .result-container {
      max-width: 720px;
      margin: 0 auto;
      background: var(--glass-bg);
      backdrop-filter: blur(10px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      box-shadow: var(--shadow-glow);
      text-align: center;
    }

    .result-type {
      font-size: 3.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 4px;
    }

    .result-name {
      font-size: 2rem;
      font-weight: 600;
      margin: 8px 0 4px;
    }

    .result-desc {
      color: var(--text-secondary);
      font-size: 1.05rem;
      margin-bottom: 20px;
    }

    .result-dims {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin: 24px 0 32px;
      text-align: left;
    }

    .dim-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
    }

    .dim-item .dim-label {
      font-weight: 600;
      color: #fff;
    }

    .dim-item .dim-bar {
      height: 6px;
      background: rgba(255,255,255,0.06);
      border-radius: 4px;
      margin: 6px 0 4px;
      overflow: hidden;
    }

    .dim-item .dim-fill {
      height: 100%;
      border-radius: 4px;
      background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
      transition: width 0.6s ease;
    }

    .dim-item .dim-values {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-secondary);
    }

    .btn-retry {
      padding: 12px 36px;
      background: transparent;
      border: 1px solid var(--accent-purple);
      border-radius: 60px;
      color: var(--accent-purple);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      font-family: inherit;
    }

    .btn-retry:hover {
      background: rgba(160, 80, 255, 0.1);
      box-shadow: 0 0 30px rgba(120, 60, 255, 0.1);
    }

    /* ===== 其他首页section ===== */
    section {
      padding: 60px 0 40px;
      border-top: 1px solid rgba(180, 140, 255, 0.03);
    }

    .section-title {
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 600;
      text-align: center;
      margin-bottom: 8px;
      background: linear-gradient(135deg, #f0eaff, var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .section-sub {
      text-align: center;
      color: var(--text-secondary);
      margin-bottom: 40px;
      font-size: 1rem;
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 28px;
    }

    .step {
      background: var(--glass-bg);
      backdrop-filter: blur(6px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      transition: var(--transition);
    }

    .step:hover {
      border-color: rgba(160, 80, 255, 0.25);
      transform: translateY(-4px);
    }

    .step .icon {
      font-size: 2.4rem;
      margin-bottom: 12px;
      display: block;
    }

    .step h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .step p {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .type-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 18px;
    }

    .type-item {
      background: var(--glass-bg);
      backdrop-filter: blur(4px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      padding: 18px 12px 14px;
      text-align: center;
      transition: var(--transition);
    }

    .type-item:hover {
      border-color: var(--accent-purple);
      box-shadow: 0 0 28px rgba(120, 60, 255, 0.08);
    }

    .type-item .code {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--accent-cyan);
      letter-spacing: 0.5px;
    }

    .type-item .name {
      font-size: 0.85rem;
      font-weight: 500;
      color: #fff;
      margin-top: 2px;
    }

    .type-item .desc {
      font-size: 0.75rem;
      color: var(--text-secondary);
      margin-top: 4px;
      opacity: 0.8;
    }

    .about-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      align-items: center;
    }

    .about-text {
      flex: 1.2;
      min-width: 280px;
    }

    .about-text h2 {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      margin-bottom: 16px;
      background: linear-gradient(135deg, #f0eaff, var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .about-text p {
      color: var(--text-secondary);
      margin-bottom: 16px;
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 20px;
    }

    .about-card {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      padding: 16px 14px;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: var(--transition);
    }

    .about-card:hover {
      border-color: rgba(160, 80, 255, 0.15);
    }

    .about-card .ico {
      font-size: 1.6rem;
    }

    .about-card .info {
      font-size: 0.85rem;
    }
    .about-card .info strong {
      color: #fff;
      font-weight: 600;
      display: block;
    }
    .about-card .info span {
      color: var(--text-secondary);
      font-size: 0.8rem;
    }

    .about-image {
      flex: 0.8;
      min-width: 200px;
      text-align: center;
    }

    .about-image img {
      max-width: 100%;
      border-radius: var(--radius-md);
      border: 1px solid var(--glass-border);
      box-shadow: var(--shadow-glow);
      background: var(--bg-secondary);
    }

    .faq-list {
      display: grid;
      gap: 16px;
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--glass-bg);
      backdrop-filter: blur(4px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      padding: 18px 24px;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(160, 80, 255, 0.12);
    }

    .faq-item h3 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 4px;
      color: #fff;
    }

    .faq-item p {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .reviews {
      text-align: center;
    }

    .review-stats {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 32px 50px;
      margin: 20px 0 30px;
    }

    .stat .number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    .stat .label {
      font-size: 0.8rem;
      color: var(--text-secondary);
      opacity: 0.7;
    }

    .review-quote {
      max-width: 600px;
      margin: 0 auto;
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 24px 28px;
      font-style: italic;
      color: var(--text-secondary);
      font-size: 0.95rem;
    }

    .review-quote .author {
      display: block;
      margin-top: 12px;
      font-style: normal;
      color: #fff;
      font-weight: 500;
    }

    footer {
      border-top: 1px solid rgba(180, 140, 255, 0.04);
      padding: 28px 0 20px;
      text-align: center;
      color: var(--text-secondary);
      font-size: 0.8rem;
      opacity: 0.6;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 640px) {
      .nav-container {
        flex-direction: column;
        align-items: center;
      }
      nav ul {
        justify-content: center;
        gap: 16px;
      }
      .mode-grid {
        grid-template-columns: 1fr 1fr;
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
      .review-stats {
        gap: 16px 30px;
      }
      .about-flex {
        flex-direction: column;
      }
      .test-container {
        padding: 24px 18px;
      }
      .result-container {
        padding: 24px 18px;
      }
      .result-dims {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 420px) {
      .mode-grid {
        grid-template-columns: 1fr;
      }
      .btn-start {
        padding: 12px 28px;
        font-size: 0.95rem;
      }
    }