/* roulang page: index */
:root {
      --bg-main: #0B0E14;
      --bg-card: #121721;
      --bg-card-alt: #182030;
      --bg-highlight: #1E283D;
      --color-primary: #00F298;
      --color-secondary: #6C4BFF;
      --color-accent: #FF3B69;
      --text-main: #F1F5F9;
      --text-muted: #94A3B8;
      --border-light: rgba(255, 255, 255, 0.08);
      --border-accent: rgba(0, 242, 152, 0.25);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      --font-mono: "JetBrains Mono", Consolas, "Courier New", monospace;
      --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      --shadow-glow: 0 0 25px rgba(0, 242, 152, 0.18);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-stack);
    }

    body {
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部微型状态条与主导航 */
    .top-bar {
      background: #06080B;
      font-size: 13px;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-light);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--color-primary);
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--color-primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--color-primary);
    }

    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11, 14, 20, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.5px;
    }
    .site-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #000;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .nav-links a:hover {
      color: var(--color-primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--color-primary);
      color: #000;
      box-shadow: 0 4px 14px rgba(0, 242, 152, 0.3);
    }
    .btn-primary:hover {
      background: #26ffaa;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 242, 152, 0.45);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--border-light);
      color: #fff;
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.2);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: linear-gradient(135deg, var(--color-secondary), #8b6aff);
      color: #fff;
      box-shadow: 0 4px 14px rgba(108, 75, 255, 0.35);
    }
    .btn-accent:hover {
      box-shadow: 0 6px 20px rgba(108, 75, 255, 0.5);
      transform: translateY(-2px);
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-darker {
      background-color: var(--bg-card);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-head {
      margin-bottom: 48px;
      max-width: 800px;
    }
    .section-head.text-center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--color-primary);
      margin-bottom: 12px;
      background: rgba(0, 242, 152, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      border: 1px solid var(--border-accent);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块1：Hero 直播预告与大图发布区 */
    .hero-live {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(108, 75, 255, 0.15) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(0, 242, 152, 0.12) 0%, transparent 50%),
                  var(--bg-main);
      padding: 80px 0 100px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 59, 105, 0.15);
      border: 1px solid rgba(255, 59, 105, 0.35);
      color: var(--color-accent);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--color-accent);
      border-radius: 50%;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 105, 0.7); }
      70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(255, 59, 105, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 105, 0); }
    }
    .hero-title {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.22;
      color: #fff;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--color-primary), #00c3ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      font-size: 16px;
      color: #CBD5E1;
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .countdown-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 32px;
    }
    .countdown-header {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 14px;
      display: flex;
      justify-content: space-between;
    }
    .countdown-timers {
      display: flex;
      gap: 16px;
    }
    .timer-unit {
      background: var(--bg-card-alt);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: var(--radius-sm);
      padding: 10px 16px;
      text-align: center;
      min-width: 72px;
    }
    .timer-val {
      font-family: var(--font-mono);
      font-size: 26px;
      font-weight: 700;
      color: var(--color-primary);
      line-height: 1.1;
    }
    .timer-lbl {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      margin-top: 4px;
    }
    .hero-cover-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    }
    .hero-cover-wrap img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      transition: transform 0.6s ease;
    }
    .hero-cover-wrap:hover img {
      transform: scale(1.03);
    }
    .hero-cover-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 30px;
      background: linear-gradient(0deg, rgba(11, 14, 20, 0.95) 10%, rgba(11, 14, 20, 0) 100%);
    }

    /* 板块2：优惠阶梯与研发阶段交付 */
    .ladder-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .ladder-step {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
      transition: all 0.3s ease;
    }
    .ladder-step:hover {
      transform: translateY(-4px);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-glow);
    }
    .ladder-num {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.08);
      position: absolute;
      top: 16px;
      right: 20px;
    }
    .ladder-tag {
      display: inline-block;
      font-size: 12px;
      color: var(--color-primary);
      background: rgba(0, 242, 152, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .ladder-step h3 {
      font-size: 18px;
      margin-bottom: 10px;
      color: #fff;
    }
    .ladder-step p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块3：套餐对比矩阵 */
    .compare-table-wrapper {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow-x: auto;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .compare-table th, .compare-table td {
      padding: 18px 22px;
      border-bottom: 1px solid var(--border-light);
    }
    .compare-table th {
      background: var(--bg-card-alt);
      font-weight: 700;
      color: #fff;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .feature-check {
      color: var(--color-primary);
      font-weight: 700;
    }
    .feature-na {
      color: rgba(255, 255, 255, 0.2);
    }

    /* 板块4：限时入口与专属定制通道 */
    .portal-banner {
      background: linear-gradient(135deg, rgba(108, 75, 255, 0.18), rgba(0, 242, 152, 0.08)), #121721;
      border: 1px solid var(--border-accent);
      border-radius: var(--radius-lg);
      padding: 44px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 30px;
    }
    .portal-content h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #fff;
    }
    .portal-content p {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
    }

    /* 板块5：爆款清单与核心组件 */
    .products-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .product-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .product-card:hover {
      transform: translateY(-5px);
      border-color: rgba(255, 255, 255, 0.2);
      box-shadow: var(--shadow-card);
    }
    .product-media {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .product-card:hover .product-media img {
      transform: scale(1.05);
    }
    .product-tag-float {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(0, 0, 0, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #fff;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-body h3 {
      font-size: 19px;
      color: #fff;
      margin-bottom: 10px;
    }
    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .product-metrics {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
      margin-bottom: 18px;
      font-size: 13px;
    }
    .metric-item span {
      display: block;
      color: var(--text-muted);
      font-size: 11px;
    }
    .metric-item strong {
      color: var(--color-primary);
      font-family: var(--font-mono);
      font-size: 15px;
    }

    /* 板块6：评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
    }
    .review-rating {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
    }
    .review-quote {
      font-size: 14px;
      color: #E2E8F0;
      line-height: 1.7;
      margin-bottom: 22px;
      flex: 1;
      font-style: italic;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-highlight);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--color-primary);
      border: 1px solid var(--border-accent);
    }
    .reviewer-meta h4 {
      font-size: 14px;
      color: #fff;
    }
    .reviewer-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块7：保障图标条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
    }
    .guarantee-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .guarantee-icon {
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: rgba(0, 242, 152, 0.08);
      border: 1px solid var(--border-accent);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      flex-shrink: 0;
    }
    .guarantee-item h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 4px;
    }
    .guarantee-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块8：资讯与白皮书 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .news-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-cover {
      height: 180px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 12px;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .news-content h3 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }
    .news-link {
      font-size: 13px;
      color: var(--color-primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块9：前后对比 */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .compare-box {
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-light);
    }
    .compare-box.before {
      background: rgba(255, 59, 105, 0.03);
      border-color: rgba(255, 59, 105, 0.2);
    }
    .compare-box.after {
      background: rgba(0, 242, 152, 0.03);
      border-color: rgba(0, 242, 152, 0.25);
    }
    .compare-box h3 {
      font-size: 20px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compare-box.before h3 { color: var(--color-accent); }
    .compare-box.after h3 { color: var(--color-primary); }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 14px;
      color: #CBD5E1;
    }
    .compare-list li {
      position: relative;
      padding-left: 24px;
      line-height: 1.6;
    }
    .compare-box.before .compare-list li::before {
      content: "✕";
      position: absolute;
      left: 0;
      color: var(--color-accent);
      font-weight: 700;
    }
    .compare-box.after .compare-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--color-primary);
      font-weight: 700;
    }

    /* 板块10：实施与交付阶段步进轴 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }
    .timeline-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 22px 18px;
      position: relative;
    }
    .step-index {
      font-family: var(--font-mono);
      font-size: 22px;
      font-weight: 800;
      color: var(--color-primary);
      margin-bottom: 10px;
    }
    .timeline-card h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 8px;
    }
    .timeline-card p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块11：合作伙伴与品牌展示 */
    .partner-matrix {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }
    .partner-tile {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      letter-spacing: 0.5px;
      transition: all 0.3s ease;
    }
    .partner-tile:hover {
      color: var(--color-primary);
      border-color: var(--border-accent);
      background: var(--bg-card-alt);
    }

    /* 板块12：常见技术问题解答 (FAQ) */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 22px;
      color: var(--color-primary);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-question::after {
      content: "−";
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: var(--bg-card-alt);
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      padding: 16px 24px 22px;
      max-height: 300px;
    }
    .faq-answer p {
      font-size: 14px;
      color: #CBD5E1;
      line-height: 1.7;
    }

    /* 板块13：加购与工程对接收口区 */
    .cta-card {
      background: radial-gradient(circle at 10% 20%, rgba(108, 75, 255, 0.25) 0%, transparent 60%),
                  radial-gradient(circle at 90% 80%, rgba(0, 242, 152, 0.2) 0%, transparent 50%),
                  #121721;
      border: 1px solid var(--border-accent);
      border-radius: var(--radius-lg);
      padding: 60px 50px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .cta-text h2 {
      font-size: 34px;
      font-weight: 800;
      color: #fff;
      line-height: 1.25;
      margin-bottom: 16px;
    }
    .cta-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 26px;
    }
    .cta-badge-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .cta-badge-item {
      font-size: 13px;
      color: var(--color-primary);
      background: rgba(0, 242, 152, 0.08);
      border: 1px solid var(--border-accent);
      padding: 6px 14px;
      border-radius: 20px;
    }
    .cta-form {
      background: var(--bg-main);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: #CBD5E1;
      margin-bottom: 6px;
      font-weight: 500;
    }
    .form-control {
      width: 100%;
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.3s ease;
    }
    .form-control:focus {
      border-color: var(--color-primary);
    }
    .form-notice {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 10px;
      line-height: 1.5;
    }

    /* 页脚 Footer */
    footer.site-footer {
      background: #06080B;
      border-top: 1px solid var(--border-light);
      padding: 70px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 18px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--color-primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 25px;
      text-align: center;
      font-size: 12px;
      color: #64748B;
      line-height: 1.8;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-cover-wrap img { height: 320px; }
      .ladder-grid { grid-template-columns: repeat(2, 1fr); }
      .products-list, .reviews-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
      .timeline-steps { grid-template-columns: repeat(3, 1fr); }
      .guarantee-bar { grid-template-columns: repeat(2, 1fr); }
      .partner-matrix { grid-template-columns: repeat(3, 1fr); }
      .cta-card { grid-template-columns: 1fr; padding: 40px 30px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-links { display: none; }
      .hero-title { font-size: 32px; }
      .ladder-grid, .products-list, .reviews-grid, .news-grid, .compare-grid { grid-template-columns: 1fr; }
      .timeline-steps { grid-template-columns: 1fr; }
      .guarantee-bar { grid-template-columns: 1fr; }
      .partner-matrix { grid-template-columns: repeat(2, 1fr); }
      .portal-banner { flex-direction: column; align-items: flex-start; padding: 28px; }
      .footer-grid { grid-template-columns: 1fr; }
      .countdown-timers { flex-wrap: wrap; }
    }