/* ===== 全局重置 ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      background: #0f172a;
      color: #e2e8f0;
      line-height: 1.6;
    }
    a {
      text-decoration: none;
      color: inherit;
    }

    /* ===== 导航栏 ===== */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 50;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #1e293b;
      padding: 16px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1200px;
      margin: 0 auto;
    }
    .navbar .logo {
      font-size: 20px;
      font-weight: 700;
      color: #e2e8f0;
    }
    .navbar .logo span {
      color: #38bdf8;
    }
    .navbar .nav-links {
      display: flex;
      gap: 32px;
      font-size: 14px;
      font-weight: 500;
      color: #94a3b8;
    }
    .navbar .nav-links a {
      transition: color 0.2s;
    }
    .navbar .nav-links a:hover {
      color: #38bdf8;
    }

    /* ===== Hero 轮播 ===== */
    .hero {
      position: relative;
      height: 100vh;
      width: 100%;
      overflow: hidden;
    }
    .hero-slide {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      transition: opacity 1s ease-in-out;
      opacity: 0;
      background-color: #1e293b;
    }
    .hero-slide.active {
      opacity: 1;
    }
    .hero-slide .overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.75) 0%, rgba(15, 23, 42, 0.45) 100%);
    }
    .hero-slide .content {
      position: relative;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: #fff;
      padding: 0 24px;
    }
    .hero-slide .content h1 {
      font-size: clamp(2.2rem, 6vw, 4rem);
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: -0.02em;
      text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    }
    .hero-slide .content p {
      font-size: clamp(1rem, 2vw, 1.25rem);
      color: #94a3b8;
      max-width: 600px;
      text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    }
    .hero-dots {
      position: absolute;
      bottom: 40px;
      left: 0;
      right: 0;
      display: flex;
      justify-content: center;
      gap: 8px;
      z-index: 10;
    }
    .hero-dots button {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      border: none;
      background: rgba(255, 255, 255, 0.25);
      cursor: pointer;
      transition: all 0.3s;
      padding: 0;
    }
    .hero-dots button.active {
      background: #38bdf8;
      width: 32px;
      border-radius: 4px;
    }
    .hero-dots button:hover {
      background: rgba(255, 255, 255, 0.5);
    }

    /* ===== 通用 section ===== */
    section {
      padding: 80px 24px;
      scroll-margin-top: 80px;
    }
    .section-title {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 700;
      color: #e2e8f0;
      margin-bottom: 8px;
      letter-spacing: -0.02em;
    }
    .section-subtitle {
      color: #94a3b8;
      margin-bottom: 40px;
      font-size: 1.05rem;
    }
    .section-inner {
      max-width: 900px;
      margin: 0 auto;
    }
    .section-inner.wide {
      max-width: 1100px;
    }
    .bg-dark-light {
      background: #1e293b;
    }

    /* ===== 关于我 ===== */
    .about-text {
      font-size: 1.1rem;
      color: #94a3b8;
      line-height: 1.8;
    }
    .about-text p + p {
      margin-top: 16px;
    }

    /* ===== 公共卡片样式 ===== */
    .base-card {
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 12px;
      padding: 20px 24px;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .base-card:hover {
      border-color: #38bdf8;
      box-shadow: 0 4px 16px rgba(56, 189, 248, 0.08);
    }
    .base-card h3 {
      font-weight: 600;
      color: #e2e8f0;
    }
    .base-card p {
      font-size: 14px;
      color: #94a3b8;
      margin-top: 4px;
    }

    /* ===== 技术栈 ===== */
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .skill-card h3 {
      font-size: 1rem;
    }
    .skill-card p {
      font-size: 13px;
    }

    /* ===== 作品集 ===== */
    .works-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .work-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .work-card .desc {
      font-size: 13px;
      color: #94a3b8;
      margin-top: 4px;
      flex: 1;
    }
    .tag {
      display: inline-block;
      font-size: 11px;
      background: #334155;
      color: #94a3b8;
      padding: 2px 10px;
      border-radius: 20px;
      white-space: nowrap;
    }
    .tag-group {
      margin-top: 10px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    /* ===== 案例按钮 ===== */
    .btn-case {
      margin-top: 14px;
      padding: 6px 18px;
      background: #38bdf8;
      color: #0f172a;
      border: none;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s, transform 0.1s;
      align-self: flex-start;
    }
    .btn-case:hover {
      background: #7dd3fc;
      transform: scale(1.02);
    }

    /* ===== 弹窗通用样式 ===== */
    .modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 1000;
      justify-content: center;
      align-items: center;
      padding: 24px;
    }
    .modal-overlay.active {
      display: flex;
    }
    .modal-overlay.dark {
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(6px);
    }
    .modal-overlay.light {
      background: rgba(0, 0, 0, 0.8);
      backdrop-filter: blur(6px);
    }
    .modal-box {
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 16px;
      max-width: 680px;
      width: 100%;
      max-height: 90vh;
      overflow-y: auto;
      padding: 32px;
      position: relative;
      animation: modalFadeIn 0.25s ease;
    }
    .modal-box.small {
      max-width: 400px;
      text-align: center;
    }
    @keyframes modalFadeIn {
      from { opacity: 0; transform: scale(0.96); }
      to { opacity: 1; transform: scale(1); }
    }
    .modal-close {
      position: absolute;
      top: 14px;
      right: 18px;
      font-size: 28px;
      line-height: 1;
      color: #94a3b8;
      cursor: pointer;
      transition: color 0.2s;
      background: none;
      border: none;
    }
    .modal-close:hover {
      color: #e2e8f0;
    }

    /* ===== 详情弹窗内容 ===== */
    .modal-box h2 {
      color: #e2e8f0;
      font-size: 1.5rem;
      margin-bottom: 4px;
      padding-right: 40px;
    }
    .modal-status {
      display: inline-block;
      font-size: 13px;
      padding: 2px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .modal-status.completed {
      background: #065f46;
      color: #6ee7b7;
    }
    .modal-status.coming {
      background: #78350f;
      color: #fcd34d;
    }
    .modal-desc {
      color: #94a3b8;
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .modal-tech {
      background: #0f172a;
      border-radius: 8px;
      padding: 16px;
      margin-bottom: 16px;
      border: 1px solid #334155;
    }
    .modal-tech h4 {
      color: #e2e8f0;
      margin-bottom: 4px;
      font-size: 14px;
    }
    .modal-tech ul {
      color: #94a3b8;
      font-size: 13px;
      padding-left: 18px;
      line-height: 1.8;
    }
    .btn-demo {
      display: inline-block;
      padding: 10px 28px;
      background: #38bdf8;
      color: #0f172a;
      border: none;
      border-radius: 8px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-demo:hover {
      background: #7dd3fc;
    }
    .modal-coming-text {
      padding: 24px 0 8px;
      text-align: center;
      color: #94a3b8;
      font-size: 1.05rem;
    }

    /* ===== 施工中弹窗 ===== */
    .construction-icon {
      font-size: 56px;
      margin-bottom: 8px;
    }
    .modal-box.small h3 {
      font-size: 20px;
      color: #e2e8f0;
      margin-bottom: 8px;
    }
    .modal-box.small p {
      color: #94a3b8;
      font-size: 15px;
      margin-bottom: 24px;
    }
    .btn-close-construction {
      padding: 8px 32px;
      background: #334155;
      color: #e2e8f0;
      border: none;
      border-radius: 8px;
      font-size: 14px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-close-construction:hover {
      background: #475569;
    }

    /* ===== 页脚 ===== */
    footer {
      border-top: 1px solid #1e293b;
      padding: 40px 24px;
      text-align: center;
    }
    footer .footer-inner {
      max-width: 600px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      font-size: 16px;
      color: #64748b;
    }
    footer .footer-inner .top-row {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #94a3b8;
      flex-wrap: wrap;
      justify-content: center;
    }
    footer .footer-inner .top-row .email-link {
      color: #94a3b8;
      transition: color 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    footer .footer-inner .top-row .email-link:hover {
      color: #38bdf8;
    }
    footer .footer-inner .top-row .email-link svg {
      width: 20px;
      height: 20px;
    }
    footer .footer-inner .beian {
      color: #64748b;
      transition: color 0.2s;
      font-size: 14px;
    }
    footer .footer-inner .beian:hover {
      color: #38bdf8;
    }

    /* ===== 统一技术规范说明 ===== */
    .tech-standard-box {
      margin-top: 32px;
      padding: 20px;
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 12px;
    }
    .tech-standard-box h3 {
      color: #e2e8f0;
      margin-bottom: 8px;
    }
    .tech-standard-box ul {
      color: #94a3b8;
      line-height: 1.8;
      padding-left: 18px;
    }

    /* ========== 【新增】公告弹窗样式 ========== */
    .announce-modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 10000;
      justify-content: center;
      align-items: center;
      padding: 24px;
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(6px);
    }
    .announce-modal-overlay.active {
      display: flex;
    }
    .announce-modal-content {
      background: #1e293b;
      color: #e2e8f0;
      padding: 2rem;
      border-radius: 12px;
      max-width: 500px;
      width: 90%;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
      animation: modalFadeIn 0.25s ease;
    }
    .announce-modal-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #334155;
      padding-bottom: 0.5rem;
      margin-bottom: 1rem;
    }
    .announce-modal-header h2 {
      margin: 0;
      font-size: 1.5rem;
    }
    .announce-modal-close {
      background: none;
      border: none;
      color: #94a3b8;
      font-size: 1.5rem;
      cursor: pointer;
      transition: color 0.2s;
    }
    .announce-modal-close:hover {
      color: #e2e8f0;
    }
    .announce-modal-body {
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }
    .announce-modal-footer {
      text-align: right;
    }
    .btn-close-announce {
      padding: 8px 24px;
      background: #38bdf8;
      color: #0f172a;
      border: none;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-close-announce:hover {
      background: #7dd3fc;
    }

    /* ========== 【新增】文章列表样式 ========== */
    .articles-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 1rem;
    }
    .article-item {
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 12px;
      padding: 20px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .article-item:hover {
      border-color: #38bdf8;
      box-shadow: 0 4px 16px rgba(56, 189, 248, 0.08);
    }
    .article-item a {
      color: #e2e8f0;
      font-size: 1.05rem;
      font-weight: 600;
      transition: color 0.2s;
      margin-bottom: 8px;
    }
    .article-item a:hover {
      color: #38bdf8;
    }
    .article-item .article-desc {
      color: #94a3b8;
      font-size: 13px;
      line-height: 1.5;
      flex: 1;
    }
    .article-item time {
      color: #64748b;
      font-size: 12px;
      margin-top: 12px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .works-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .articles-list {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .navbar .nav-links {
        gap: 16px;
        font-size: 13px;
      }
      section {
        padding: 56px 16px;
      }
      .skills-grid {
        grid-template-columns: 1fr 1fr;
      }
      .works-grid {
        grid-template-columns: 1fr;
      }
      .articles-list {
        grid-template-columns: 1fr;
      }
      .hero-slide .content h1 {
        font-size: 1.8rem;
      }
      footer .footer-inner {
        font-size: 14px;
      }
      footer .footer-inner .top-row {
        gap: 8px;
        flex-wrap: wrap;
      }
      .modal-box {
        padding: 24px 16px;
      }
    }
    @media (max-width: 480px) {
      .navbar {
        flex-direction: column;
        gap: 8px;
        padding: 12px 16px;
      }
      .navbar .nav-links {
        gap: 12px;
        font-size: 12px;
        flex-wrap: wrap;
        justify-content: center;
      }
      .skills-grid {
        grid-template-columns: 1fr;
      }
    }