/* ══════════════════════════════════════════
       TOP NA
    /* ══════════════════════════════════════════
       PAGE BODY OFFSET
    ══════════════════════════════════════════ */
    .page-body {
    
    }

    /* ══════════════════════════════════════════
       SECTION 1: BANNER / HERO
    ══════════════════════════════════════════ */
    .hero {
      position: relative;
      width: 100%;
      height: 800px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding-bottom: 6%;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center bottom;
      pointer-events: none;
      user-select: none;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(235,245,255,0.10) 0%, rgba(220,238,252,0.05) 40%, transparent 70%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 0 24px;
      margin-top: -12%;
    }

    .hero-title {
      font-size: clamp(28px, 3.8vw, 52px);
      font-weight: 700;
      color: #0c1d3a;
      line-height: 1.28;
      letter-spacing: 0.03em;
      margin-bottom: 16px;
    }

    .hero-title .highlight {
      background: linear-gradient(90deg, #00b4d8 0%, #4361ee 52%, #7b2ff7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: clamp(12.5px, 1.2vw, 15px);
      color: #3a4c62;
      line-height: 1.9;
      max-width: 500px;
      margin: 0 auto 30px;
      letter-spacing: 0.02em;
    }
    .hero-sub .flow-step { font-weight: 600; color: #1a52a0; }
    .hero-sub .flow-dash { color: #6b93c0; margin: 0 2px; }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: clamp(13px, 1.1vw, 15px);
      font-weight: 500;
      border-radius: 40px;
      padding: 12px 32px;
      cursor: pointer;
      border: none;
      letter-spacing: 0.04em;
      transition: transform 0.18s ease, box-shadow 0.18s ease;
      font-family: inherit;
      white-space: nowrap;
    }
    .btn:hover  { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }

    .btn-hero-primary {
      background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
      color: #fff;
      box-shadow: 0 4px 18px rgba(67,97,238,0.38);
    }
    .btn-hero-primary:hover  { box-shadow: 0 8px 28px rgba(67,97,238,0.52); }
    .btn-hero-primary::after { content: " →"; font-size: 14px; }

    .btn-hero-secondary {
      background: #ffffff;
      color: #1a4fa8;
      border: 1.5px solid rgba(37,99,235,0.40);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(37,99,235,0.10);
    }
    .btn-hero-secondary:hover {
      background: rgba(255,255,255,0.75);
      box-shadow: 0 4px 18px rgba(37,99,235,0.20);
    }

    /* ══════════════════════════════════════════
       SECTION 2: 产品定位介绍
    ══════════════════════════════════════════ */
    .platform-section {
      max-width: 1200px;
      margin: 0 auto;
      padding: 80px 40px 88px;
      display: flex;
      align-items: center;
      gap: 64px;
      background: #FFFFFF;
    }

    .platform-section .left-col {
      flex: 0 0 460px;
    }

    .main-title {
      font-size: 28px;
      font-weight: 700;
      color: #111827;
      line-height: 1.45;
      margin-bottom: 14px;
      letter-spacing: 0.01em;
    }
    .main-title .hl { color: #1677ff; }

    .subtitle {
      font-size: 14px;
      color: #6b7280;
      line-height: 1.75;
      margin-bottom: 28px;
    }

    .problem-intro {
      font-size: 13.5px;
      color: #374151;
      line-height: 1.65;
      margin-bottom: 16px;
      padding-left: 12px;
      border-left: 3px solid #1677ff;
    }
    .problem-intro strong { color: #1677ff; font-weight: 700; }

    .transform-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 36px;
    }
    .transform-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      line-height: 1.6;
    }
    .chk-blue {
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      background: #1677ff;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 11px;
      font-weight: 800;
      margin-top: 1px;
    }
    .t-from { color: #9ca3af; }
    .t-arr  { color: #1677ff; font-weight: 700; margin: 0 5px; }
    .t-to   { color: #111827; font-weight: 600; }

    .cta-btn-blue {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, #1e80ff 0%, #0052d9 100%);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      padding: 13px 30px;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      letter-spacing: 0.03em;
      box-shadow: 0 4px 14px rgba(22,119,255,0.38);
      transition: transform 0.18s ease, box-shadow 0.18s ease;
    }
    .cta-btn-blue:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(22,119,255,0.48); }

    .platform-section .right-col {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .product-card {
      width: 100%;
      max-width: 560px;
      border-radius: 14px;
      overflow: hidden;
      box-shadow: 0 24px 64px rgba(0,52,160,0.14), 0 6px 20px rgba(0,52,160,0.08);
      transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
      transition: transform 0.4s ease;
    }
    .product-card:hover { transform: perspective(1200px) rotateY(-2deg) rotateX(1deg); }

    .card-header-blue {
      background: linear-gradient(135deg, #1e80ff 0%, #0052d9 100%);
      padding: 14px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .header-logo-icon {
      width: 30px;
      height: 30px;
      background: rgba(255,255,255,0.18);
      border-radius: 7px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
    }
    .header-name-text { color: #fff; font-size: 14.5px; font-weight: 600; }
    .header-sub-badge {
      margin-left: auto;
      color: rgba(255,255,255,0.65);
      font-size: 12px;
      background: rgba(255,255,255,0.12);
      padding: 3px 10px;
      border-radius: 20px;
    }

    .card-nav-bar {
      background: #1a6fe8;
      display: flex;
      padding: 0 20px;
      gap: 4px;
    }
    .nav-tab-item {
      font-size: 12px;
      color: rgba(255,255,255,0.6);
      padding: 8px 14px;
      border-radius: 6px 6px 0 0;
      cursor: default;
    }
    .nav-tab-item.active-tab { background: #fff; color: #1677ff; font-weight: 600; }

    .card-body-area {
      background: #f5f8ff;
      padding: 20px;
    }

    .section-label-sm {
      font-size: 11px;
      font-weight: 600;
      color: #9ca3af;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .flow-row-card {
      display: flex;
      align-items: stretch;
      background: #fff;
      border-radius: 10px;
      border: 1px solid #e5e7eb;
      overflow: hidden;
      margin-bottom: 16px;
    }
    .flow-step-item {
      flex: 1;
      padding: 14px 10px;
      text-align: center;
      position: relative;
    }
    .flow-step-item + .flow-step-item { border-left: 1px solid #f0f0f0; }
    .flow-step-icon-lg { font-size: 22px; margin-bottom: 7px; display: block; }
    .flow-step-name-txt { font-size: 13px; font-weight: 700; color: #111827; margin-bottom: 3px; }
    .flow-step-desc-txt { font-size: 11px; color: #9ca3af; line-height: 1.5; }
    .flow-arr-txt { display: flex; align-items: center; padding: 0 2px; color: #1677ff; font-size: 16px; font-weight: 700; background: #fff; flex-shrink: 0; }

    .transform-card-inner {
      background: #fff;
      border-radius: 10px;
      border: 1px solid #e5e7eb;
      overflow: hidden;
    }
    .transform-card-hdr {
      background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
      padding: 10px 16px;
      font-size: 11.5px;
      font-weight: 700;
      color: #3730a3;
      letter-spacing: 0.04em;
    }
    .tr-row-item {
      display: flex;
      align-items: center;
      padding: 10px 16px;
      gap: 12px;
      border-bottom: 1px solid #f3f4f6;
    }
    .tr-row-item:last-child { border-bottom: none; }
    .tr-from-txt { flex: 1; font-size: 12px; color: #6b7280; background: #f9fafb; padding: 5px 10px; border-radius: 6px; text-align: center; font-weight: 500; }
    .tr-icon-txt { color: #1677ff; font-size: 14px; font-weight: 700; flex-shrink: 0; }
    .tr-to-txt { flex: 1; font-size: 12px; color: #1677ff; font-weight: 600; background: #eff6ff; padding: 5px 10px; border-radius: 6px; text-align: center; }

    .progress-area-bar {
      margin-top: 14px;
      background: #fff;
      border-radius: 10px;
      border: 1px solid #e5e7eb;
      padding: 14px 16px;
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .prog-label-txt { font-size: 12px; color: #374151; font-weight: 500; flex-shrink: 0; white-space: nowrap; }
    .prog-bar-wrap { flex: 1; height: 6px; background: #e5e7eb; border-radius: 99px; overflow: hidden; }
    .prog-bar-fill { height: 100%; width: 68%; background: linear-gradient(90deg, #1e80ff, #36b8f5); border-radius: 99px; }
    .prog-pct-txt { font-size: 12px; font-weight: 700; color: #1677ff; flex-shrink: 0; }

    /* Section wrapper bg */
    .section-bg-blue-light { background: #eef3fb; }
    .section-bg-white { background: #fff; }
    .section-bg-gradient { background: linear-gradient(160deg, #eef3fb 0%, #f5f8ff 40%, #eaf0fb 100%); }
    .section-bg-gradient2 { background: linear-gradient(180deg, #f0f4ff 0%, #e8f0fe 100%); }

    /* Platform section wrapper */
    .platform-wrapper { background: #FFFFFF; }

    /* ══════════════════════════════════════════
       SECTION 3: 产品独特优势 (AI训练优势)
    ══════════════════════════════════════════ */
    .advantages-section {
      max-width: 1260px;
      margin: 0 auto;
      padding: 72px 40px 80px;
    }

    .section-header-center {
      text-align: center;
      margin-bottom: 40px;
    }
    .section-header-center h2 {
      font-size: 38px;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: #111827;
      line-height: 1.3;
    }
    .section-header-center p {
      margin-top: 12px;
      font-size: 15px;
      color: #6b7280;
      letter-spacing: 0.03em;
    }

    .adv-tabs {
      display: flex;
      justify-content: center;
      gap: 8px;
      margin-bottom: 40px;
    }
    .adv-tab-btn {
      padding: 10px 28px;
      border-radius: 8px;
      border: none;
      font-size: 15px;
      font-weight: 500;
      cursor: pointer;
      background: transparent;
      color: #374151;
      transition: all 0.2s ease;
      letter-spacing: 0.02em;
    }
    .adv-tab-btn:hover { background: rgba(79,110,242,0.08); color: #4f6ef2; }
    .adv-tab-btn.active { background: #4f6ef2; color: #fff; box-shadow: 0 4px 14px rgba(79,110,242,0.35); }

    .adv-content-panel {
      display: none;
      background: #fff;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 4px 40px rgba(79,110,242,0.08);
    }
    .adv-content-panel.active { display: flex; }

    .adv-left-col {
      flex: 1;
      padding: 52px 52px 52px 56px;
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .adv-left-col h3 {
      font-size: 26px;
      font-weight: 700;
      color: #111827;
      margin-bottom: 14px;
      letter-spacing: 0.01em;
    }
    .adv-left-col .desc {
      font-size: 14.5px;
      color: #4b5563;
      line-height: 1.75;
      margin-bottom: 28px;
      padding-bottom: 28px;
      border-bottom: 1px solid #e5e7eb;
    }

    .feature-list-adv {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-bottom: 32px;
    }
    .feature-item-adv h4 { font-size: 15px; font-weight: 600; color: #4f6ef2; margin-bottom: 4px; }
    .feature-item-adv p { font-size: 13px; color: #6b7280; line-height: 1.6; }

    .value-tag-adv {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
      border-radius: 10px;
      padding: 12px 18px;
      margin-top: auto;
    }
    .value-tag-adv .label { font-size: 12px; font-weight: 600; background: #4f6ef2; color: #fff; border-radius: 6px; padding: 2px 8px; white-space: nowrap; }
    .value-tag-adv .text { font-size: 13.5px; color: #3730a3; font-weight: 500; line-height: 1.5; }

    .adv-right-col {
      width: 420px;
      flex-shrink: 0;
      background: linear-gradient(145deg, #c7d4f8 0%, #b8c6f5 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 40px 36px;
      position: relative;
      overflow: hidden;
    }
    .adv-right-col::before {
      content: "";
      position: absolute;
      top: -60px; right: -60px;
      width: 200px; height: 200px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(79,110,242,0.12) 0%, transparent 70%);
    }
    .adv-right-col::after {
      content: "";
      position: absolute;
      bottom: -40px; left: -40px;
      width: 160px; height: 160px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(99,102,241,0.10) 0%, transparent 70%);
    }

    .visual-card-adv {
      background: #fff;
      border-radius: 16px;
      box-shadow: 0 8px 32px rgba(79,110,242,0.12);
      padding: 28px;
      width: 100%;
      position: relative;
      z-index: 1;
    }
    .win-bar { display: flex; gap: 6px; margin-bottom: 20px; }
    .win-bar span { width: 10px; height: 10px; border-radius: 50%; }
    .win-bar span:nth-child(1) { background: #ff5f56; }
    .win-bar span:nth-child(2) { background: #ffbd2e; }
    .win-bar span:nth-child(3) { background: #27c93f; }

    .node-grid { display: flex; flex-direction: column; gap: 14px; }
    .node-row { display: flex; align-items: center; gap: 10px; }
    .node {
      display: flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #eef2ff, #e0e7ff);
      border-radius: 20px;
      padding: 8px 14px;
      font-size: 12px;
      font-weight: 600;
      color: #4f6ef2;
      white-space: nowrap;
    }
    .node.accent {
      background: linear-gradient(135deg, #4f6ef2, #6366f1);
      color: #fff;
      box-shadow: 0 4px 12px rgba(79,110,242,0.35);
    }
    .node .icon { width: 18px; height: 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 10px; }
    .node .icon.teal { background: rgba(20,184,166,0.2); color: #14b8a6; }
    .node .icon.purple { background: rgba(139,92,246,0.2); color: #8b5cf6; }
    .node .icon.blue { background: rgba(79,110,242,0.15); color: #4f6ef2; }
    .node .icon.orange { background: rgba(249,115,22,0.15); color: #f97316; }
    .node.accent .icon { background: rgba(255,255,255,0.25); color: #fff; }
    .arrow-icon { color: #a5b4fc; font-size: 18px; flex-shrink: 0; }

    .chat-bubble {
      background: #f3f4f6;
      border-radius: 12px;
      padding: 10px 14px;
      font-size: 12px;
      color: #6b7280;
      margin-top: 8px;
    }
    .score-row { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
    .score-item { display: flex; align-items: center; gap: 10px; font-size: 12px; color: #6b7280; }
    .score-bar-bg { flex: 1; height: 6px; background: #e5e7eb; border-radius: 3px; overflow: hidden; }
    .score-bar { height: 100%; background: linear-gradient(90deg, #4f6ef2, #818cf8); border-radius: 3px; }
    .score-num { font-weight: 600; color: #4f6ef2; font-size: 12px; min-width: 28px; text-align: right; }

    .chart-area { margin-top: 8px; }
    .chart-bars { display: flex; align-items: flex-end; gap: 8px; height: 80px; }
    .chart-bar-wrap { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; }
    .chart-bar-col { width: 100%; border-radius: 4px 4px 0 0; background: linear-gradient(180deg, #4f6ef2, #818cf8); opacity: 0.75; }
    .chart-bar-col.highlight { background: linear-gradient(180deg, #4f6ef2, #3730a3); opacity: 1; }
    .chart-label { font-size: 10px; color: #9ca3af; white-space: nowrap; }

    /* ══════════════════════════════════════════
       SECTION 4: 核心能力架构
    ══════════════════════════════════════════ */
    .capabilities-wrap {
      max-width: 1260px;
      margin: 0 auto;
      padding: 72px 60px 80px;
    }
    .capabilities-title {
      text-align: center;
      margin-bottom: 40px;
    }
    .capabilities-title h2 {
      font-size: 36px;
      font-weight: 700;
      color: #233863;
      letter-spacing: 1px;
    }

    .cap-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      align-items: stretch;
    }
    .cap-card {
      background: white;
      border: 1.5px solid #5b8de8;
      border-radius: 6px;
      overflow: hidden;
    }
    .cap-card-header {
      background: #2b5adf;
      color: white;
      text-align: center;
      padding: 12px 10px;
      font-size: 15px;
      font-weight: 700;
      letter-spacing: 0.5px;
      line-height: 1.4;
    }
    .cap-card-header .cap-num { font-size: 12px; font-weight: 500; opacity: 0.85; display: block; margin-bottom: 2px; }
    .cap-card-header .cap-title-txt { font-size: 16px; font-weight: 700; }
    .cap-card-body { padding: 14px 14px 16px; background: #f5f8ff; }
    .cap-card-desc {
      font-size: 12.5px;
      color: #445577;
      line-height: 1.65;
      margin-bottom: 14px;
      padding: 10px;
      background: white;
      border-radius: 4px;
      border-left: 3px solid #7aaaf0;
      min-height: calc(12.5px * 1.65 * 3 + 20px);
    }
    .cap-section-hdr {
      background: #3e6ee4;
      color: white;
      font-size: 12.5px;
      font-weight: 600;
      padding: 6px 10px;
      border-radius: 3px;
      margin-bottom: 8px;
      letter-spacing: 0.3px;
    }
    .cap-bullet-list { display: flex; flex-direction: column; gap: 6px; }
    .cap-bullet-item {
      background: #dde8f8;
      border-radius: 3px;
      padding: 7px 10px;
      font-size: 12px;
      color: #2a3a5a;
      line-height: 1.5;
    }
    .cap-bullet-item strong { color: #1a3080; font-weight: 700; }

    /* ══════════════════════════════════════════
       SECTION 5: 场景解决方案
    ══════════════════════════════════════════ */
    .scenarios-section {
      max-width: 1200px;
      margin: 0 auto;
      padding: 72px 40px 80px;
    }
    .scenarios-section .section-header-center { margin-bottom: 48px; }
    .scenarios-section .section-header-center h2 {
      font-size: 28px;
      font-weight: 500;
      color: #111827;
    }
    .scenarios-section .section-header-center p {
      margin-top: 12px;
      font-size: 14px;
      color: #6b7280;
      line-height: 1.7;
    }

    .cards-row {
      display: flex;
      gap: 8px;
      height: 460px;
      align-items: stretch;
    }
    .sc-card {
      flex: 1;
      border-radius: 12px;
      overflow: hidden;
      cursor: pointer;
      transition: flex 0.38s cubic-bezier(0.4,0,0.2,1);
      position: relative;
    }
    .sc-card.active { flex: 4; cursor: default; }

    .card-collapsed {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 24px 16px;
      color: #fff;
      opacity: 1;
      transition: opacity 0.2s ease;
    }
    .sc-card.active .card-collapsed { opacity: 0; pointer-events: none; }
    .card-collapsed .cc-icon { font-size: 26px; margin-bottom: 10px; }
    .card-collapsed h3 { font-size: 15px; font-weight: 700; line-height: 1.4; margin-bottom: 6px; }
    .card-collapsed p { font-size: 11.5px; line-height: 1.6; opacity: 0.85; }
    .card-collapsed .cc-hint { margin-top: 14px; font-size: 12px; opacity: 0.6; }
    .card-collapsed::after {
      content: "";
      position: absolute;
      top: -30px; right: -30px;
      width: 110px; height: 110px;
      border-radius: 50%;
      background: rgba(255,255,255,0.08);
      pointer-events: none;
    }

    .card-expanded {
      position: absolute;
      inset: 0;
      background: #fff;
      padding: 36px 40px;
      display: flex;
      flex-direction: column;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.25s ease 0.15s;
      overflow: hidden;
    }
    .sc-card.active .card-expanded { opacity: 1; pointer-events: auto; }

    .card-badge-sc {
      display: inline-block;
      font-size: 11px;
      font-weight: 600;
      color: #4f6ef2;
      background: #eef2ff;
      border-radius: 4px;
      padding: 3px 10px;
      margin-bottom: 12px;
      width: fit-content;
      letter-spacing: 0.04em;
      white-space: nowrap;
    }
    .card-expanded h2 { font-size: 20px; font-weight: 700; color: #111827; margin-bottom: 8px; line-height: 1.4; white-space: nowrap; }
    .feat-sub { font-size: 13px; color: #6b7280; line-height: 1.65; margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid #e5e7eb; }

    .bullet-list-sc { list-style: none; display: flex; flex-direction: column; gap: 12px; flex: 1; margin-bottom: 20px; }
    .bullet-list-sc li { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: #374151; line-height: 1.6; }
    .chk-sc { flex-shrink: 0; width: 18px; height: 18px; background: #4f6ef2; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 10px; font-weight: 700; margin-top: 1px; }
    .bl-label { font-weight: 600; color: #111827; }
    .bl-text { color: #4b5563; }

    .value-strip { background: linear-gradient(135deg, #eef2ff, #e0e7ff); border-radius: 8px; padding: 12px 16px; font-size: 13px; color: #3730a3; line-height: 1.55; margin-top: auto; flex-shrink: 0; }
    .v-label { font-weight: 700; color: #4f6ef2; margin-right: 4px; }

    .g0 { background: linear-gradient(170deg, #1565c0 0%, #0097a7 100%); }
    .g1 { background: linear-gradient(170deg, #1976d2 0%, #00acc1 100%); }
    .g2 { background: linear-gradient(170deg, #0288d1 0%, #26c6da 100%); }
    .g3 { background: linear-gradient(170deg, #0d47a1 0%, #0077b6 100%); }
    .g4 { background: linear-gradient(170deg, #283593 0%, #006064 100%); }

    /* ══════════════════════════════════════════
       SECTION 6: 客户信任背书
    ══════════════════════════════════════════ */
    .trust-hero-section {
      max-width: 1260px;
      margin: 0 auto;
      padding: 60px 40px 16px;
      text-align: center;
    }
    .trust-hero-section h2 {
      font-size: 32px;
      font-weight: 600;
      color: #111827;
      letter-spacing: 0.02em;
      line-height: 1.4;
      margin-bottom: 24px;
    }

    .trust-tab-nav {
      display: flex;
      justify-content: center;
      gap: 32px;
      margin-bottom: 32px;
    }
    .trust-tab-btn {
      background: none;
      border: none;
      font-size: 15px;
      color: #6b7280;
      padding: 8px 16px;
      cursor: pointer;
      position: relative;
      transition: color 0.2s ease;
      font-weight: 500;
    }
    .trust-tab-btn:hover { color: #4f6ef2; }
    .trust-tab-btn.active { color: #4f6ef2; font-weight: 600; }
    .trust-tab-btn.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      right: 0;
      height: 3px;
      background: #4f6ef2;
      border-radius: 2px;
    }

    .trust-case-container {
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 40px 60px;
    }
    .trust-case-content {
      display: none;
      background: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
      min-height: 480px;
    }
    .trust-case-content.active { display: grid; grid-template-columns: 1fr 1fr; }

    .case-left-col {
      padding: 48px 40px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .case-badge-trust {
      display: inline-block;
      font-size: 11px;
      font-weight: 600;
      color: #4f6ef2;
      background: #eef2ff;
      border-radius: 4px;
      padding: 4px 12px;
      letter-spacing: 0.04em;
      width: fit-content;
    }
    .case-title-txt { font-size: 24px; font-weight: 700; color: #111827; line-height: 1.4; margin-bottom: 8px; }
    .case-subtitle-txt { font-size: 14px; color: #6b7280; line-height: 1.6; padding-bottom: 20px; border-bottom: 1px solid #e5e7eb; }

    .trust-info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 8px; }
    .trust-info-item h4 { font-size: 13px; color: #6b7280; font-weight: 500; margin-bottom: 6px; }
    .trust-info-item p { font-size: 15px; color: #111827; font-weight: 600; }

    .trust-feature-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .trust-feature-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: #374151; line-height: 1.6; }
    .trust-check-icon {
      flex-shrink: 0;
      width: 18px; height: 18px;
      background: #4f6ef2;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 10px;
      font-weight: 700;
      margin-top: 2px;
    }
    .trust-highlight-box {
      background: linear-gradient(135deg, #eef2ff, #e0e7ff);
      border-radius: 8px;
      padding: 16px 20px;
      font-size: 13px;
      color: #374151;
      line-height: 1.7;
    }
    .trust-highlight-box strong { color: #4f6ef2; font-weight: 600; }

    .trust-cta-buttons { display: flex; gap: 12px; margin-top: 8px; }
    .trust-btn-primary { background: #4f6ef2; color: #fff; border: none; padding: 10px 24px; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; transition: background 0.2s ease; }
    .trust-btn-primary:hover { background: #3d5ce0; }
    .trust-btn-secondary { background: transparent; color: #4f6ef2; border: 1px solid #4f6ef2; padding: 10px 24px; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
    .trust-btn-secondary:hover { background: #eef2ff; }

    .case-right-col {
      background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); 
      padding: 48px 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .case-right-col::before { content: ""; position: absolute; top: -50px; right: -50px; width: 200px; height: 200px; border-radius: 50%; background: rgba(255,255,255,0.1); }
    .case-right-col::after { content: ""; position: absolute; bottom: -80px; left: -80px; width: 280px; height: 280px; border-radius: 50%; background: rgba(255,255,255,0.08); }
    .trust-case-content[data-case="shell"] .case-right-col { background: background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }

    .trust-visual-content { position: relative; z-index: 1; text-align: center; color: #fff; }
    .trust-stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; margin-bottom: 32px; }
    .trust-stat-item { text-align: center; }
    .trust-stat-number { font-size: 48px; font-weight: 700; color: #fff; line-height: 1.2; margin-bottom: 8px; }
    .trust-stat-label { font-size: 13px; color: rgba(255,255,255,0.85); font-weight: 500; }
    .trust-visual-text { font-size: 16px; color: rgba(255,255,255,0.95); line-height: 1.6; max-width: 400px; }

    /* ══════════════════════════════════════════
       CTA SECTION (before footer)
    ══════════════════════════════════════════ */
    .cta-section {
      background: #FFFFFF;
      position: relative;
      overflow: hidden;
      padding: 80px 0;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .cta-inner {
      max-width: 1260px;
      width: 1260px;
      margin: 0 auto;
      text-align: center;
      position: relative;
      z-index: 1;
      padding: 80px 60px;
      background: #229AF4;
      background-image: url('./images/cta-bg.png');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      border-radius: 20px;
      box-shadow: 0 20px 60px rgba(30, 58, 138, 0.25);
    }

    .cta-inner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(30, 58, 138, 0.1);
      pointer-events: none;
      border-radius: 20px;
    }

    .cta-title {
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 700;
      color: #ffffff;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
    }

    .cta-subtitle {
      font-size: clamp(15px, 1.5vw, 18px);
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.7;
      margin-bottom: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      letter-spacing: 0.01em;
    }

    .cta-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      background: #ffffff;
      color: #229AF4;
      font-size: 17px;
      font-weight: 600;
      padding: 16px 48px;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
      letter-spacing: 0.03em;
    }

    .cta-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
      background: #f0f9ff;
    }

    .cta-button::after {
      content: "→";
      font-size: 18px;
      transition: transform 0.3s ease;
    }

    .cta-button:hover::after {
      transform: translateX(4px);
    }

    /* ══════════════════════════════════════════
       FOOTER (marketingforce style)
    ══════════════════════════════════════════ */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 0;
    }

    .footer-inner {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .footer-brand .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }
    .footer-brand .brand-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, #1e80ff 0%, #0052d9 100%);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 16px;
      font-weight: 800;
      letter-spacing: -1px;
    }
    .footer-brand .brand-name {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
    }
    .footer-brand .brand-name span { color: #3b82f6; }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.75;
      color: #64748b;
      margin-bottom: 20px;
    }
    .footer-social {
      display: flex;
      gap: 10px;
    }
    .social-btn {
      width: 34px;
      height: 34px;
      background: rgba(255,255,255,0.06);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      cursor: pointer;
      transition: background 0.15s;
    }
    .social-btn:hover { background: rgba(255,255,255,0.12); }

    .footer-col h4 {
      font-size: 13px;
      font-weight: 600;
      color: #e2e8f0;
      margin-bottom: 16px;
      letter-spacing: 0.04em;
    }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-col ul li a {
      font-size: 13px;
      color: #64748b;
      text-decoration: none;
      transition: color 0.15s;
    }
    .footer-col ul li a:hover { color: #94a3b8; }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
    }
    .footer-bottom-left {
      font-size: 12.5px;
      color: #475569;
    }
    .footer-bottom-right {
      display: flex;
      gap: 20px;
    }
    .footer-bottom-right a {
      font-size: 12.5px;
      color: #475569;
      text-decoration: none;
      transition: color 0.15s;
    }
    .footer-bottom-right a:hover { color: #94a3b8; }

    /* QR code placeholder */
    .footer-qr {
      width: 72px;
      height: 72px;
      background: rgba(255,255,255,0.08);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 32px;
      margin-top: 16px;
    }

    /* ══════════════════════════════════════════
       RESPONSIVE
    ══════════════════════════════════════════ */
    @media (max-width: 1300px) {
      .cta-inner {
        width: calc(100% - 80px);
        margin: 0 40px;
      }
    }

    @media (max-width: 1100px) {
      .cap-grid { grid-template-columns: repeat(3, 1fr); }
      .cap-card-desc { min-height: 0; }
      .footer-top { grid-template-columns: 1fr 1fr 1fr; }
    }

    @media (max-width: 900px) {
      .platform-section { flex-direction: column; padding: 48px 24px 56px; gap: 40px; }
      .platform-section .left-col { flex: none; width: 100%; }
      .main-title { font-size: 22px; }
      .product-card { transform: none; max-width: 100%; }
      .product-card:hover { transform: none; }
      .adv-content-panel.active { flex-direction: column; }
      .adv-right-col { width: 100%; padding: 36px; }
      .adv-left-col { padding: 40px 32px; }
      .section-header-center h2 { font-size: 28px; }
      .cards-row { flex-direction: column; height: auto; }
      .sc-card { flex: none !important; height: 80px; transition: height 0.38s cubic-bezier(0.4,0,0.2,1); }
      .sc-card.active { height: 460px; }
      .card-expanded { padding: 28px 24px; }
      .trust-case-content.active { grid-template-columns: 1fr; }
      .trust-stats-grid { grid-template-columns: 1fr; gap: 24px; }
      .nav-links { display: none; }
      .cta-section { padding: 60px 24px; }
      .cta-inner { width: 100%; margin: 0; border-radius: 12px; padding: 50px 32px; }
      .cta-title { font-size: 28px; }
      .cta-subtitle { font-size: 15px; }
    }

    @media (max-width: 768px) {
      .hero-content { margin-top: -8%; }
      .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
      .trust-case-container, .trust-hero-section { padding-left: 20px; padding-right: 20px; }
      .cta-section { padding: 40px 20px; }
      .cta-inner { padding: 40px 24px; }
      .cta-button { padding: 14px 36px; font-size: 15px; }
    }

    @media (max-width: 600px) {
      .hero { height: auto; min-height: 100svh; }
      .hero-bg { object-position: 35% bottom; }
      .hero-content { margin-top: -18%; }
      .nav-inner { padding: 0 20px; }
      .footer-inner { padding: 0 20px; }
      .footer-top { grid-template-columns: 1fr; }
      .cap-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
      .capabilities-wrap { padding: 48px 20px 60px; }
    }

    @media (max-width: 480px) {
      .platform-section { padding: 36px 16px 44px; }
      .main-title { font-size: 20px; }
      .cap-grid { grid-template-columns: 1fr; }
    }