/* ===== ICON SYSTEM ===== */
      .icon {
        width: 24px;
        height: 24px;
        flex-shrink: 0;
      }

      .icon svg {
        width: 100%;
        height: 100%;
        stroke: currentColor;
        stroke-width: 2;
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .icon-md {
        width: 40px;
        height: 40px;
      }

      .icon-lg {
        width: 48px;
        height: 48px;
      }

      /* ===== HERO ===== */
      .scene-hero {
        padding: 80px 0 70px;
        text-align: center;
        position: relative;
        overflow: hidden;
      }

      .scene-hero-bg-img {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        aspect-ratio: 16 / 9;
        z-index: 1;
      }

      .scene-hero-overlay {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 2;
      }

      .scene-hero .container {
        position: relative;
        z-index: 3;
        background: rgba(255, 255, 255, 0.72);
        padding: 28px 48px;
        border-radius: 14px;
        box-shadow: 0 10px 36px rgba(0, 0, 0, 0.18);
        max-width: 600px;
        margin: 70px auto;
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
      }

      .scene-hero .hero-badge {
        display: inline-block;
        font-size: 11px;
        letter-spacing: 4px;
        color: var(--primary);
        font-weight: 600;
        margin-bottom: 12px;
        padding: 5px 14px;
        border: 1px solid rgba(13, 110, 253, 0.3);
        border-radius: 20px;
      }

      .scene-hero h1 {
        font-size: 36px;
        font-weight: 300;
        color: #000;
        margin-bottom: 10px;
        letter-spacing: 6px;
        font-family: "Noto Serif SC", "Source Han Serif SC", "SimSun", "宋体", "STSong", serif;
      }

      .scene-hero .hero-line {
        width: 56px;
        height: 3px;
        background: #0d6efd;
        border-radius: 2px;
        margin: 0 auto 16px;
      }

      .scene-hero .hero-sub {
        font-size: 14px;
        color: #4b5563;
        max-width: 640px;
        margin: 0 auto 28px;
        line-height: 1.7;
      }

      .scene-hero .hero-btns {
        display: flex;
        justify-content: center;
        gap: 16px;
      }

      .scene-hero .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 16px rgba(13, 110, 253, 0.35);
      }

      .scene-hero .btn-primary:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
      }

      .scene-hero .btn-outline {
        background: transparent;
        color: #1f2937;
        border: 1.5px solid rgba(0, 0, 0, 0.25);
      }

      .scene-hero .btn-outline:hover {
        background: rgba(0, 0, 0, 0.06);
        border-color: #1f2937;
      }

      /* ===== FILTER BAR ===== */
      .filter-bar {
        position: sticky;
        top: 88px;
        background: #fff;
        border-bottom: 1px solid var(--border);
        z-index: 100;
        padding: 0;
      }

      .filter-inner {
        display: flex;
        align-items: stretch;
        max-width: 1100px;
        margin: 0 auto;
      }

      .filter-btn {
        flex: 1;
        padding: 18px 0;
        border: none;
        background: none;
        font-size: 14px;
        font-weight: 300;
        color: var(--text-light);
        cursor: pointer;
        transition: all 0.2s;
        font-family: inherit;
        position: relative;
        text-align: center;
        border-right: 1px solid var(--border);
      }

      .filter-btn:last-child {
        border-right: none;
      }

      .filter-btn::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 3px;
        background: var(--primary);
        transition: width 0.25s ease;
      }

      .filter-btn:hover {
        color: var(--primary);
      }

      .filter-btn.active {
        color: var(--primary);
      }

      .filter-btn.active::after {
        width: 32px;
      }

      /* ===== SCENE SECTIONS ===== */
      .scene-section {
        padding: 80px 0;
        border-bottom: 1px solid var(--border);
      }

      .scene-section.alt {
        background: var(--bg-gray);
      }

      .scene-section.hidden {
        display: none;
      }

      .scene-inner {
        max-width: 1100px;
        margin: 0 auto;
        padding: 0 24px;
      }

      .scene-top {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 56px;
        align-items: start;
      }

      .scene-top.reverse {
        direction: rtl;
      }

      .scene-top.reverse>* {
        direction: ltr;
      }

      .scene-info {
        display: flex;
        flex-direction: column;
      }

      .scene-title {
        font-size: 26px;
        font-weight: 300;
        color: var(--dark);
        margin-bottom: 8px;
        letter-spacing: 3px;
        font-family: "Noto Sans SC", sans-serif;
      }

      .scene-subtitle {
        font-size: 15px;
        color: var(--text-light);
        margin-bottom: 28px;
        line-height: 1.7;
        font-weight: 300;
      }

      .scene-pain {
        background: #fff;
        border-left: 3px solid var(--accent);
        padding: 22px 24px;
        margin-bottom: 16px;
      }

      .scene-pain h4 {
        font-size: 14px;
        font-weight: 300;
        color: var(--accent);
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .scene-pain h4 .icon {
        color: var(--accent);
      }

      .scene-pain ul {
        list-style: none;
        padding: 0;
        margin: 0;
      }

      .scene-pain li {
        font-size: 14px;
        color: var(--dark);
        padding: 6px 0 6px 22px;
        position: relative;
        line-height: 1.6;
        font-weight: 300;
      }

      .scene-pain li::before {
        content: '';
        position: absolute;
        left: 0;
        top: 13px;
        width: 10px;
        height: 2px;
        background: var(--accent);
        border-radius: 1px;
      }

      .scene-solution {
        background: var(--primary-light);
        border-left: 3px solid var(--primary);
        padding: 22px 24px;
      }

      .scene-solution h4 {
        font-size: 14px;
        font-weight: 300;
        color: var(--primary);
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .scene-solution h4 .icon {
        color: var(--primary);
      }

      .scene-solution ul {
        list-style: none;
        padding: 0;
        margin: 0;
      }

      .scene-solution li {
        font-size: 14px;
        color: var(--dark);
        padding: 6px 0 6px 22px;
        position: relative;
        line-height: 1.6;
        font-weight: 300;
      }

      .scene-solution li::before {
        content: '';
        position: absolute;
        left: 3px;
        top: 11px;
        width: 6px;
        height: 6px;
        background: var(--primary);
        border-radius: 50%;
      }

      .scene-visual {
        background: #fff;
        border: 1px solid var(--border);
        position: relative;
        overflow: hidden;
      }

      .scene-visual img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
        inset: 0;
      }

      .scene-images {
        display: flex;
        flex-direction: column;
        gap: 16px;
        margin-top: 50px;
        align-self: stretch;
      }

      .scene-images .scene-visual {
        flex: 1;
        min-height: 280px;
      }

      .scene-images .scene-visual-extra {
        flex-shrink: 0;
        height: 180px;
        background: #fff;
        border: 1px solid var(--border);
        position: relative;
        overflow: hidden;
      }

      .scene-images .scene-visual-extra img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
        inset: 0;
      }

      .scene-visual-extra {
        display: none;
      }

      /* Benefit bar */
      .benefit-bar {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 40px;
      }

      .benefit-card {
        background: #fff;
        border: 1px solid var(--border);
        padding: 32px 24px;
        text-align: center;
        transition: all 0.25s ease;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 160px;
      }

      .benefit-card:hover {
        border-color: var(--primary);
        transform: translateY(-2px);
      }

      .benefit-num {
        font-size: 28px;
        font-weight: 300;
        color: var(--primary);
        margin-bottom: 8px;
        line-height: 1;
        letter-spacing: 1px;
      }

      .benefit-label {
        font-size: 14px;
        font-weight: 300;
        color: var(--dark);
        margin-bottom: 6px;
      }

      .benefit-desc {
        font-size: 12px;
        color: var(--text-muted);
        line-height: 1.6;
        font-weight: 300;
      }

      .scene-case {
        display: flex;
        align-items: flex-start;
        gap: 16px;
        margin-top: 28px;
        padding: 18px 20px;
        background: rgba(13, 110, 253, 0.04);
        border: 1px solid rgba(13, 110, 253, 0.12);
      }

      .scene-case-tag {
        font-size: 11px;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-light);
        padding: 4px 12px;
        flex-shrink: 0;
      }

      .scene-case p {
        font-size: 13px;
        color: var(--text-light);
        line-height: 1.7;
      }

      .scene-case strong {
        color: var(--dark);
      }

      /* ===== GUIDE SECTION ===== */
      .guide-section {
        padding: 80px 0;
        background: var(--bg);
      }

      .guide-header {
        text-align: center;
        margin-bottom: 48px;
      }

      .guide-header h2 {
        font-size: 32px;
        font-weight: 300;
        color: var(--dark);
        margin-bottom: 12px;
        letter-spacing: 2px;
      }

      .guide-header .divider {
        width: 40px;
        height: 2px;
        background: var(--primary);
        margin: 16px auto;
      }

      .guide-header p {
        font-size: 15px;
        color: var(--text-light);
        max-width: 600px;
        margin: 0 auto;
      }

      .guide-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        align-items: stretch;
      }

      .guide-card {
        background: #fff;
        border: 1px solid var(--border);
        padding: 32px 28px;
        transition: all 0.25s ease;
        display: flex;
        flex-direction: column;
      }

      .guide-card:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow);
      }

      .guide-step {
        font-size: 12px;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 14px;
        letter-spacing: 1px;
      }

      .guide-card h3 {
        font-size: 17px;
        font-weight: 600;
        color: var(--dark);
        margin-bottom: 12px;
      }

      .guide-card p {
        font-size: 13px;
        color: var(--text-light);
        line-height: 1.8;
        flex: 1;
      }

      /* ===== CTA ===== */
      .cta-section {
        padding: 60px 0;
        background: var(--bg-gray);
      }

      .cta-card {
        display: grid;
        grid-template-columns: 1.1fr 0.9fr;
        gap: 0;
        align-items: stretch;
        background: linear-gradient(135deg, #3a7bd5 0%, #5b9eed 45%, #7eb8f4 100%);
        border: none;
        border-radius: 0;
        box-shadow: 0 12px 40px rgba(58, 123, 213, 0.25);
        position: relative;
        overflow: hidden;
      }

      .cta-card::before {
        content: "";
        position: absolute;
        top: -60px;
        left: -60px;
        width: 320px;
        height: 320px;
        background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
      }

      .cta-left {
        max-width: 560px;
        padding: 48px 56px;
        position: relative;
        z-index: 1;
      }

      .cta-heading {
        font-size: 28px;
        font-weight: 600;
        color: #fff;
        line-height: 1.35;
        margin-bottom: 14px;
        letter-spacing: -0.5px;
      }

      .cta-subtitle {
        font-size: 15px;
        color: rgba(255, 255, 255, 0.8);
        line-height: 1.7;
        margin-bottom: 28px;
      }

      .cta-btns {
        display: flex;
        gap: 14px;
        margin-bottom: 32px;
        flex-wrap: wrap;
      }

      .cta-btns .btn-accent {
        background: #e8593a;
        box-shadow: 0 4px 16px rgba(232, 89, 58, 0.35);
      }

      .cta-btns .btn-accent:hover {
        background: #d04a2e;
      }

      .cta-btns .btn-outline {
        padding: 13px 30px;
        border-radius: 0;
        font-size: 15px;
        font-weight: 600;
        background: transparent;
        color: #fff;
        border: 1.5px solid rgba(255, 255, 255, 0.5);
      }

      .cta-btns .btn-outline:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: #fff;
        color: #fff;
      }

      .cta-features {
        display: flex;
        gap: 24px;
        flex-wrap: wrap;
      }

      .cta-feature {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.8);
      }

      .cta-feature .check {
        width: 20px;
        height: 20px;
        background: rgba(255, 255, 255, 0.25);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
      }

      .cta-feature .check svg {
        width: 11px;
        height: 11px;
      }

      .cta-feature .check svg path {
        stroke: #fff;
      }

      .cta-right {
        position: relative;
        z-index: 1;
        overflow: hidden;
        min-height: 100%;
      }

      .cta-image {
        width: 100%;
        object-fit: cover;
        display: block;
        -webkit-mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.15) 25%, rgba(0, 0, 0, 0.7) 45%, black 60%);
        mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.15) 25%, rgba(0, 0, 0, 0.7) 45%, black 60%);
        filter: hue-rotate(-15deg) saturate(0.85) brightness(1.05);
      }

      /* ===== RESPONSIVE ===== */
      @media (max-width: 900px) {
        .scene-hero {
          padding: 0;
          position: relative;
          overflow: visible;
        }

        .scene-hero-bg-img {
          position: relative;
          width: 100%;
          height: auto;
          aspect-ratio: 16 / 9;
          object-fit: cover;
          display: block;
          z-index: 1;
        }

        .scene-hero-overlay {
          display: none;
        }

        .scene-hero .container {
          position: relative;
          z-index: 2;
          background: #fff;
          padding: 16px 18px;
          border-radius: 10px;
          box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
          max-width: 92%;
          margin: 10px auto 10px;
        }

        .scene-hero .hero-badge {
          margin-bottom: 8px;
          font-size: 10px;
          padding: 4px 10px;
        }

        .scene-hero h1 {
          font-size: 22px;
          margin-bottom: 6px;
          letter-spacing: 3px;
        }

        .scene-hero .hero-line {
          width: 36px;
          margin: 0 auto 10px;
        }

        .scene-hero .hero-sub {
          font-size: 12px;
          margin: 0 auto 14px;
          line-height: 1.6;
        }

        .scene-hero .hero-btns {
          flex-direction: row;
          gap: 10px;
        }

        .scene-hero .hero-btns .btn {
          padding: 8px 16px;
          font-size: 12px;
        }

        .scene-top,
        .scene-top.reverse {
          grid-template-columns: 1fr;
          direction: ltr;
        }

        .scene-top.reverse>* {
          direction: ltr;
        }

        .scene-images .scene-visual {
          min-height: 240px !important;
        }

        .scene-images .scene-visual-extra {
          height: 140px !important;
        }

        .benefit-bar {
          grid-template-columns: 1fr;
        }

        .guide-grid {
          grid-template-columns: 1fr;
        }

        .cta-card {
          grid-template-columns: 1fr;
        }

        .cta-left {
          padding: 32px 28px;
        }

        .cta-right {
          order: -1;
          min-height: 200px;
        }

        .cta-heading {
          font-size: 22px;
        }

        .cta-features {
          flex-direction: column;
          gap: 12px;
        }

        .nav-menu {
          display: none;
        }

        .nav-contact {
          display: none;
        }

        .mobile-menu-btn {
          display: flex;
        }

        .navbar .container {
          display: flex;
          justify-content: space-between;
          grid-template-columns: none;
        }

        /* 移动端筛选栏改为横向滑动胶囊，避免 9 个按钮挤在一行 */
        .filter-bar {
          top: 68px;
          padding: 30px 0 10px;
          box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .filter-inner {
          display: flex;
          flex-direction: row;
          gap: 8px;
          padding: 0 14px;
          overflow-x: auto;
          overflow-y: hidden;
          scroll-behavior: smooth;
          scroll-snap-type: x proximity;
          scroll-padding-left: 14px;
          -webkit-overflow-scrolling: touch;
          scrollbar-width: none;
        }

        .filter-inner::-webkit-scrollbar {
          display: none;
        }

        .filter-btn {
          flex: 0 0 auto;
          white-space: nowrap;
          padding: 8px 16px;
          font-size: 13px;
          line-height: 1.4;
          border: 1px solid var(--border);
          border-radius: 999px;
          background: #f7f8fa;
          color: var(--text-light);
          scroll-snap-align: start;
        }

        .filter-btn:last-child {
          border-right: 1px solid var(--border);
          margin-right: 14px;
        }

        .filter-btn::after {
          display: none;
        }

        .filter-btn.active {
          background: var(--primary);
          border-color: var(--primary);
          color: #fff;
          font-weight: 500;
        }
      }