/* roulang page: index */
:root {
      --primary-dark: #0F3A2B;
      --primary-forest: #164E3A;
      --primary-soft: #1E664D;
      --accent-scarlet: #E63946;
      --accent-hover: #C92A37;
      --accent-orange: #FF5400;
      --bg-cream: #F4F6F5;
      --bg-surface: #FFFFFF;
      --bg-card: #FAFCFB;
      --bg-dark-slab: #111614;
      --text-main: #141A17;
      --text-muted: #3D4742;
      --text-dim: #6B7770;
      --line-stroke: #E2E7E4;
      --line-dark: #222B27;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 10px rgba(15, 58, 43, 0.05);
      --shadow-md: 0 6px 24px -4px rgba(15, 58, 43, 0.08);
      --shadow-lg: 0 16px 36px -6px rgba(15, 58, 43, 0.12);
      --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      font-size: 16px;
      scroll-behavior: smooth;
      background-color: var(--bg-cream);
      color: var(--text-main);
      overflow-x: hidden;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-smooth);
    }

    ul, ol {
      list-style: none;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    .tabular-data {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
      font-feature-settings: "tnum";
    }

    /* 顶部服务条 */
    .top-bar {
      background-color: #0b251b;
      color: #9ab3a8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 0.45rem 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.75rem;
    }
    .top-bar-info {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }
    .top-bar-status {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .pulse-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background-color: #2ecc71;
      box-shadow: 0 0 6px #2ecc71;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line-stroke);
      box-shadow: var(--shadow-sm);
    }
    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--primary-dark);
      letter-spacing: -0.02em;
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-forest), var(--primary-dark));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 2px 8px rgba(15, 58, 43, 0.25);
    }
    .brand-text {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      line-height: 1.15;
    }
    .brand-sub {
      font-size: 0.7rem;
      color: var(--text-dim);
      font-weight: 500;
      letter-spacing: 0.05em;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      position: relative;
      padding: 0.5rem 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-dark);
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-scarlet);
    }

    .btn-scarlet {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent-scarlet);
      color: #ffffff;
      font-size: 0.9375rem;
      font-weight: 700;
      padding: 0.7rem 1.4rem;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 14px rgba(230, 57, 70, 0.25);
      transition: var(--transition-smooth);
      white-space: nowrap;
    }
    .btn-scarlet:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(230, 57, 70, 0.35);
      color: #fff;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      color: var(--primary-dark);
      font-size: 0.9375rem;
      font-weight: 700;
      padding: 0.7rem 1.4rem;
      border: 1.5px solid var(--primary-dark);
      border-radius: var(--radius-sm);
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: var(--primary-dark);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 移动端菜单按钮 */
    .mobile-menu-toggle {
      display: none;
      font-size: 1.5rem;
      color: var(--primary-dark);
    }

    /* 斜切色块首屏 (Hero Blueprint) */
    .hero-angled-section {
      position: relative;
      overflow: hidden;
      background-color: #0b1d16;
      color: #ffffff;
      padding: 5.5rem 0 7rem;
      background-image: linear-gradient(135deg, rgba(11,29,22,0.95) 0%, rgba(15,58,43,0.85) 60%, rgba(9,19,15,0.98) 100%), url('/assets/images/4b5f835aa6e48295.jpg');
      background-size: cover;
      background-position: center;
    }
    .hero-angled-cut {
      position: absolute;
      bottom: -1px;
      left: 0;
      width: 100%;
      height: 70px;
      background-color: var(--bg-cream);
      clip-path: polygon(0 100%, 100% 100%, 100% 0);
    }
    .hero-layout {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(230, 57, 70, 0.15);
      border: 1px solid rgba(230, 57, 70, 0.4);
      color: #ff858d;
      font-size: 0.8125rem;
      font-weight: 700;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      margin-bottom: 1.25rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .hero-heading {
      font-size: 2.85rem;
      line-height: 1.18;
      font-weight: 900;
      letter-spacing: -0.03em;
      margin-bottom: 1.4rem;
      color: #ffffff;
    }
    .hero-heading span {
      color: #ff5e6c;
      background: linear-gradient(90deg, #ff7a85, #ffb3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      font-size: 1.05rem;
      line-height: 1.8;
      color: #d1ded8;
      margin-bottom: 2rem;
      max-width: 620px;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      flex-wrap: wrap;
    }
    .hero-feature-pills {
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      display: flex;
      gap: 1.75rem;
      flex-wrap: wrap;
    }
    .pill-item {
      display: flex;
      flex-direction: column;
    }
    .pill-val {
      font-size: 1.4rem;
      font-weight: 800;
      color: #ffffff;
    }
    .pill-label {
      font-size: 0.75rem;
      color: #9bb1a8;
    }
    .hero-media-stage {
      position: relative;
      border-radius: var(--radius-lg);
      padding: 8px;
      background: linear-gradient(145deg, rgba(255,255,255,0.18), rgba(255,255,255,0.02));
      box-shadow: var(--shadow-lg);
    }
    .hero-stage-img {
      border-radius: calc(var(--radius-lg) - 4px);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .hero-telemetry-badge {
      position: absolute;
      bottom: -20px;
      left: 24px;
      background: rgba(17, 22, 20, 0.95);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(8px);
      padding: 0.9rem 1.4rem;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      display: flex;
      gap: 1.5rem;
    }
    .telemetry-col h4 {
      font-size: 0.725rem;
      color: #9bb1a8;
      text-transform: uppercase;
    }
    .telemetry-col p {
      font-size: 1.2rem;
      font-weight: 800;
      color: #2ecc71;
    }

    /* 板块通用标题 */
    .section-head {
      margin-bottom: 2.75rem;
      max-width: 820px;
    }
    .section-head.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .badge-sub {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 800;
      color: var(--accent-scarlet);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 0.5rem;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* Section 基础间距 */
    .content-section {
      padding: 5rem 0;
    }
    .bg-white {
      background-color: var(--bg-surface);
    }
    .bg-light-slab {
      background-color: var(--bg-cream);
    }
    .bg-dark-slab {
      background-color: var(--bg-dark-slab);
      color: #ffffff;
    }
    .bg-dark-slab .section-title {
      color: #ffffff;
    }
    .bg-dark-slab .section-desc {
      color: #abbcb4;
    }

    /* 蓝图要求：Hero → 左资讯流 → 右热榜/入口 */
    .split-stream-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 2.5rem;
      align-items: start;
    }
    .stream-feed-list {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .stream-article-card {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      display: flex;
      gap: 1.5rem;
      transition: var(--transition-smooth);
    }
    .stream-article-card:hover {
      border-color: var(--primary-soft);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .article-thumb {
      width: 180px;
      height: 120px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      flex-shrink: 0;
    }
    .article-body {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary-forest);
      background: rgba(22, 78, 58, 0.08);
      display: inline-block;
      padding: 0.15rem 0.6rem;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 0.4rem;
    }
    .article-title {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 0.5rem;
    }
    .article-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 右侧热榜 / 快速入口 */
    .rank-board-card {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-sm);
    }
    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 1rem;
      border-bottom: 2px solid var(--primary-dark);
      margin-bottom: 1.25rem;
    }
    .board-title {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .board-tag {
      font-size: 0.75rem;
      background: var(--accent-scarlet);
      color: #ffffff;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      font-weight: 700;
    }
    .rank-list {
      display: flex;
      flex-direction: column;
      gap: 1.1rem;
    }
    .rank-item {
      display: flex;
      align-items: flex-start;
      gap: 0.85rem;
    }
    .rank-idx {
      width: 24px;
      height: 24px;
      border-radius: 4px;
      background: #eef2f0;
      color: var(--text-dim);
      font-weight: 800;
      font-size: 0.85rem;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .rank-item:nth-child(1) .rank-idx {
      background: #e63946;
      color: #fff;
    }
    .rank-item:nth-child(2) .rank-idx {
      background: #ff5400;
      color: #fff;
    }
    .rank-item:nth-child(3) .rank-idx {
      background: #0f3a2b;
      color: #fff;
    }
    .rank-name {
      font-size: 0.925rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 0.2rem;
    }
    .rank-val {
      font-size: 0.775rem;
      color: var(--text-dim);
    }

    /* 快捷入口方格 */
    .quick-entry-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.75rem;
      margin-top: 1.5rem;
      padding-top: 1.5rem;
      border-top: 1px dashed var(--line-stroke);
    }
    .entry-btn {
      background: var(--bg-cream);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-sm);
      padding: 0.85rem;
      text-align: center;
      transition: var(--transition-smooth);
    }
    .entry-btn:hover {
      background: var(--primary-dark);
      color: #fff;
      border-color: var(--primary-dark);
    }
    .entry-btn span {
      display: block;
      font-size: 0.875rem;
      font-weight: 700;
    }
    .entry-btn small {
      font-size: 0.725rem;
      color: var(--text-dim);
    }
    .entry-btn:hover small {
      color: #a4c4b6;
    }

    /* 专题条 (Topic Ribbon) */
    .topic-strip {
      background: linear-gradient(90deg, #103829, #1c5e44);
      color: #ffffff;
      padding: 2.2rem 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .topic-pills-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1.25rem;
      flex-wrap: wrap;
    }
    .topic-lead {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.1rem;
      font-weight: 800;
    }
    .topic-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
    }
    .topic-chip {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 0.4rem 1rem;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #ffffff;
      transition: var(--transition-smooth);
    }
    .topic-chip:hover {
      background: var(--accent-scarlet);
      border-color: var(--accent-scarlet);
    }

    /* 硬件感知层 (图文交错) */
    .hw-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
    }
    .hw-visual {
      position: relative;
    }
    .hw-main-img {
      border-radius: var(--radius-lg);
      width: 100%;
      height: 420px;
      object-fit: cover;
      box-shadow: var(--shadow-lg);
    }
    .hw-param-card {
      position: absolute;
      bottom: -20px;
      right: -20px;
      background: var(--bg-surface);
      border-left: 4px solid var(--accent-scarlet);
      padding: 1.25rem 1.5rem;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      max-width: 270px;
    }
    .hw-param-card h5 {
      font-size: 0.775rem;
      color: var(--text-dim);
      margin-bottom: 0.25rem;
    }
    .hw-param-card strong {
      font-size: 1.35rem;
      color: var(--primary-dark);
      display: block;
    }
    .hw-spec-list {
      margin-top: 1.75rem;
      display: flex;
      flex-direction: column;
      gap: 1.1rem;
    }
    .hw-spec-item {
      display: flex;
      gap: 1rem;
      align-items: flex-start;
    }
    .spec-icon-box {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: rgba(15, 58, 43, 0.08);
      color: var(--primary-forest);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .spec-content h4 {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 0.2rem;
    }
    .spec-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 六维核心优势矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      padding: 2rem 1.75rem;
      transition: var(--transition-smooth);
      position: relative;
    }
    .matrix-card:hover {
      border-color: var(--primary-soft);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .card-num {
      position: absolute;
      top: 1.5rem;
      right: 1.5rem;
      font-size: 1.5rem;
      font-weight: 900;
      color: #e2ece7;
      line-height: 1;
    }
    .matrix-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 0.75rem;
    }
    .matrix-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .matrix-card .card-chip {
      margin-top: 1.25rem;
      display: inline-block;
      font-size: 0.775rem;
      font-weight: 700;
      color: var(--primary-soft);
      background: #edf5f1;
      padding: 0.25rem 0.65rem;
      border-radius: 4px;
    }

    /* 方案选型与产品对比 (Hot Products) */
    .plans-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .plan-card {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-lg);
      padding: 2.25rem 2rem;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition-smooth);
    }
    .plan-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .plan-card.featured {
      border: 2px solid var(--accent-scarlet);
      box-shadow: var(--shadow-md);
    }
    .featured-badge {
      position: absolute;
      top: -13px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-scarlet);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 0.25rem 0.9rem;
      border-radius: 999px;
      letter-spacing: 0.05em;
    }
    .plan-header h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 0.4rem;
    }
    .plan-target {
      font-size: 0.85rem;
      color: var(--text-dim);
      margin-bottom: 1.25rem;
    }
    .plan-specs {
      margin: 1.5rem 0;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      border-top: 1px solid var(--line-stroke);
      padding-top: 1.25rem;
    }
    .spec-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.875rem;
    }
    .spec-row span {
      color: var(--text-dim);
    }
    .spec-row strong {
      color: var(--text-main);
    }

    /* 运动生物力学内核深色区 */
    .dark-engine-layout {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 4rem;
      align-items: center;
    }
    .engine-telemetry-panel {
      background: #17211d;
      border: 1px solid #283731;
      border-radius: var(--radius-lg);
      padding: 2rem;
      position: relative;
    }
    .engine-img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 360px;
      object-fit: cover;
      margin-bottom: 1.5rem;
      border: 1px solid #2c3e37;
    }
    .data-bars-group {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .bar-label-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.825rem;
      margin-bottom: 0.35rem;
      color: #9ab3a8;
    }
    .progress-track {
      width: 100%;
      height: 8px;
      background: #09100d;
      border-radius: 4px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      border-radius: 4px;
    }
    .fill-scarlet {
      background: var(--accent-scarlet);
      width: 92%;
    }
    .fill-green {
      background: #2ecc71;
      width: 88%;
    }
    .fill-orange {
      background: var(--accent-orange);
      width: 76%;
    }

    /* 实测场景区 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .scene-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--line-stroke);
      transition: var(--transition-smooth);
    }
    .scene-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .scene-img {
      width: 100%;
      height: 170px;
      object-fit: cover;
    }
    .scene-body {
      padding: 1.35rem;
    }
    .scene-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 0.4rem;
    }
    .scene-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 全维度指标追踪条 */
    .metrics-ribbon {
      background: var(--primary-dark);
      color: #ffffff;
      padding: 3rem 0;
    }
    .metrics-track-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-col-item {
      padding: 0 1rem;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .metric-col-item:last-child {
      border-right: none;
    }
    .metric-unit-val {
      font-size: 2.25rem;
      font-weight: 900;
      color: #ffffff;
      line-height: 1.1;
      margin-bottom: 0.35rem;
    }
    .metric-unit-val span {
      font-size: 1.1rem;
      color: #e63946;
      margin-left: 0.2rem;
    }
    .metric-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #cde3d9;
      margin-bottom: 0.25rem;
    }
    .metric-note {
      font-size: 0.775rem;
      color: #8da69c;
    }

    /* 标杆案例区 (Case Studies) */
    .case-story-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1.25fr;
      box-shadow: var(--shadow-sm);
    }
    .case-media img {
      width: 100%;
      height: 100%;
      min-height: 380px;
      object-fit: cover;
    }
    .case-content {
      padding: 3rem 3rem 2.5rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-meta {
      font-size: 0.8125rem;
      font-weight: 800;
      color: var(--accent-scarlet);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.75rem;
    }
    .case-headline {
      font-size: 1.7rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 1.25rem;
    }
    .case-narrative {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 1.75rem;
    }
    .case-delta-box {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
      padding: 1.25rem;
      background: var(--bg-cream);
      border-radius: var(--radius-md);
      border: 1px solid var(--line-stroke);
    }
    .delta-metric strong {
      display: block;
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--primary-forest);
    }
    .delta-metric span {
      font-size: 0.75rem;
      color: var(--text-dim);
    }

    /* 交付与科研统计条 */
    .stats-counter-strip {
      padding: 3.5rem 0;
      background: #f0f4f2;
      border-top: 1px solid var(--line-stroke);
      border-bottom: 1px solid var(--line-stroke);
    }
    .stats-card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .stat-box {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      padding: 1.75rem 1.25rem;
      text-align: center;
    }
    .stat-num {
      font-size: 2.3rem;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1.1;
      margin-bottom: 0.35rem;
    }
    .stat-label {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* 教练与球探社会认同评价 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .testimonial-card {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      padding: 2.25rem 1.85rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .quote-icon {
      font-size: 2.5rem;
      color: #e3ebe7;
      line-height: 1;
      margin-bottom: 0.75rem;
    }
    .quote-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 1.5rem;
    }
    .author-info {
      display: flex;
      align-items: center;
      gap: 0.85rem;
      border-top: 1px solid var(--line-stroke);
      padding-top: 1rem;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-forest);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }
    .author-meta h5 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .author-meta p {
      font-size: 0.775rem;
      color: var(--text-dim);
    }

    /* 对比表格 (Matrix Comparison) */
    .table-container {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comparison-table th, .comparison-table td {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--line-stroke);
    }
    .comparison-table th {
      background: #f8faf9;
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .comparison-table th.highlight-col {
      background: #edf5f1;
      color: var(--primary-forest);
      border-bottom: 2px solid var(--primary-forest);
    }
    .comparison-table td.highlight-col {
      background: #f7fbf9;
      font-weight: 700;
      color: var(--primary-dark);
    }
    .check-yes {
      color: #27ae60;
      font-weight: 800;
    }
    .check-no {
      color: #95a5a6;
    }

    /* 常见异议折叠 (Accordion FAQ) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-smooth);
    }
    .faq-trigger {
      width: 100%;
      padding: 1.35rem 1.75rem;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-trigger:hover {
      color: var(--primary-forest);
    }
    .faq-icon {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-dim);
      transition: var(--transition-smooth);
    }
    .faq-panel {
      padding: 0 1.75rem 1.35rem;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.75;
      display: none;
    }
    .faq-item.open .faq-panel {
      display: block;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--accent-scarlet);
    }

    /* 服务承诺徽章条 */
    .warranty-strip {
      background: #ffffff;
      border-top: 1px solid var(--line-stroke);
      border-bottom: 1px solid var(--line-stroke);
      padding: 2.75rem 0;
    }
    .warranty-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
    }
    .warranty-item {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .warranty-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: #eef5f2;
      color: var(--primary-forest);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      flex-shrink: 0;
    }
    .warranty-text h4 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .warranty-text p {
      font-size: 0.775rem;
      color: var(--text-dim);
    }

    /* 权威合作与生态 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 1.25rem;
      align-items: center;
    }
    .partner-box {
      background: var(--bg-surface);
      border: 1px solid var(--line-stroke);
      padding: 1.25rem 0.75rem;
      text-align: center;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-dim);
    }

    /* 页脚 */
    .site-footer {
      background-color: var(--primary-dark);
      color: #9cb1a7;
      padding: 4.5rem 0 2rem;
      border-top: 4px solid var(--accent-scarlet);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h3 {
      font-size: 1.35rem;
      color: #ffffff;
      font-weight: 800;
      margin-bottom: 0.75rem;
    }
    .footer-brand p {
      font-size: 0.875rem;
      line-height: 1.75;
      margin-bottom: 1.25rem;
      max-width: 340px;
    }
    .footer-col h4 {
      font-size: 1rem;
      color: #ffffff;
      font-weight: 800;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-links a {
      font-size: 0.85rem;
      color: #9cb1a7;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-contact-item {
      font-size: 0.85rem;
      margin-bottom: 0.65rem;
      line-height: 1.5;
    }
    .footer-contact-item strong {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.8125rem;
    }

    /* 底部轻量固定转化条 */
    .floating-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(17, 22, 20, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      z-index: 99;
      padding: 0.8rem 0;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }
    .floating-cta-bar.visible {
      transform: translateY(0);
    }
    .float-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
    }
    .float-info {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .float-title {
      font-size: 0.95rem;
      font-weight: 800;
      color: #ffffff;
    }
    .float-desc {
      font-size: 0.8rem;
      color: #9cb1a7;
    }
    .float-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .split-stream-grid {
        grid-template-columns: 1fr;
      }
      .hw-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .matrix-grid, .plans-grid, .testimonials-grid {
        grid-template-columns: 1fr 1fr;
      }
      .dark-engine-layout {
        grid-template-columns: 1fr;
      }
      .scene-grid, .metrics-track-grid, .stats-card-grid, .warranty-grid {
        grid-template-columns: 1fr 1fr;
      }
      .case-story-wrapper {
        grid-template-columns: 1fr;
      }
      .case-media img {
        height: 280px;
        min-height: auto;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-heading {
        font-size: 2.1rem;
      }
      .hero-angled-section {
        padding: 3.5rem 0 5rem;
      }
      .matrix-grid, .plans-grid, .testimonials-grid, .scene-grid, .metrics-track-grid, .stats-card-grid, .warranty-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .stream-article-card {
        flex-direction: column;
      }
      .article-thumb {
        width: 100%;
        height: 180px;
      }
      .float-desc {
        display: none;
      }
      .partner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .topic-strip {
        padding: 1.5rem 0;
      }
      .metric-col-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding-bottom: 1.5rem;
      }
      .metric-col-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
    }