/* Use local system fonts to avoid external font requests. */
      body {
        font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
        background-color: #111827; /* 深色背景 */
        color: #d1d5db; /* Màu chữ xám nhạt */
      }

      /* 背景气泡效果 */
      #background-bubbles {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        overflow: hidden;
      }

      .bubble {
        position: absolute;
        bottom: -150px;
        background-color: rgba(
          59,
          130,
          246,
          0.05
        ); /* Màu bong bóng xanh dương rất nhạt */
        border-radius: 50%;
        animation: moveBubbles 35s linear infinite;
      }

      @keyframes moveBubbles {
        0% {
          transform: translateY(0) rotate(0deg);
        }
        100% {
          transform: translateY(-120vh) rotate(360deg);
        }
      }

      /* 蓝色渐变按钮 */
      .btn-gradient-blue {
        background-image: linear-gradient(to top, #1d4ed8, #3b82f6);
        color: white;
        transition: all 0.2s ease;
        box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.2),
          0 4px 15px rgba(59, 130, 246, 0.25);
        border-radius: 9999px;
      }
      .btn-gradient-blue:hover {
        transform: translateY(-2px);
        box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.2),
          0 8px 20px rgba(59, 130, 246, 0.3);
      }

      /* 绿色渐变按钮 */
      .btn-gradient-green {
        background-image: linear-gradient(to top, #16a34a, #22c55e);
        color: white;
        transition: all 0.2s ease;
        box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.2),
          0 4px 15px rgba(34, 197, 94, 0.25);
        border-radius: 9999px;
      }
      .btn-gradient-green:hover {
        transform: translateY(-2px);
        box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.2),
          0 8px 20px rgba(34, 197, 94, 0.3);
      }

      /* 阴影效果 & 毛玻璃 cho các card */
      .card-shadow {
        background-color: rgba(31, 41, 55, 0.5); /* Màu nền xám đậm mờ */
        backdrop-filter: blur(8px);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 1rem;
      }

      /* 主 CTA 区域的网格背景 */
      .grid-background {
        background-color: rgba(31, 41, 55, 0.3);
        backdrop-filter: blur(4px);
        background-image: linear-gradient(
            rgba(107, 114, 128, 0.2) 1px,
            transparent 1px
          ),
          linear-gradient(
            to right,
            rgba(107, 114, 128, 0.2) 1px,
            transparent 1px
          );
        background-size: 25px 25px;
      }

      /* 跑马灯 */
      @keyframes marquee {
        0% {
          transform: translateX(100%);
        }
        100% {
          transform: translateX(-100%);
        }
      }
      .marquee-container {
        width: 100%;
        overflow: hidden;
        white-space: nowrap;
      }
      .animate-marquee {
        display: inline-block;
        animation: marquee 25s linear infinite;
        padding-left: 100%;
      }

      /* 主 Logo 横幅装饰 */
      .logo-banner {
        position: relative;
      }
      .logo-banner::before,
      .logo-banner::after {
        content: "";
        position: absolute;
        width: 30px;
        height: 12px;
        background-color: #000;
        top: -1px;
        z-index: -1;
      }
      .logo-banner::before {
        left: 20px;
        transform: skewX(-40deg);
      }
      .logo-banner::after {
        right: 20px;
        transform: skewX(40deg);
      }

      .landing-shell {
        min-height: 100vh;
        position: relative;
        overflow: hidden;
        padding: 48px 20px 56px;
        background:
          radial-gradient(circle at 18% 12%, rgba(59, 130, 246, 0.28), transparent 32%),
          radial-gradient(circle at 86% 24%, rgba(245, 158, 11, 0.16), transparent 28%),
          linear-gradient(180deg, #0b1220 0%, #10233d 48%, #0b1220 100%);
      }

      .landing-shell::before {
        content: "";
        position: absolute;
        inset: 0;
        pointer-events: none;
        background-image:
          linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
          linear-gradient(90deg, rgba(148, 163, 184, 0.08) 1px, transparent 1px);
        background-size: 36px 36px;
        mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.65), transparent 78%);
      }

      .hero-layout,
      .platform-section,
      .download-section,
      .landing-footer {
        position: relative;
        z-index: 1;
        max-width: 1180px;
        margin: 0 auto;
      }

      .hero-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(420px, 520px);
        gap: 40px;
        align-items: center;
        min-height: 430px;
        padding: 34px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 18px;
        background: rgba(15, 23, 42, 0.72);
        box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
        backdrop-filter: blur(14px);
      }

      .hero-content {
        text-align: left;
      }

      .hero-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 28px;
      }

      .hero-nav span {
        color: rgba(226, 232, 240, 0.78);
        font-size: 14px;
        padding: 6px 12px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.04);
      }

      .brand-kicker {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 18px;
        color: #60a5fa;
        font-weight: 800;
      }

      .brand-kicker img {
        height: 34px;
        width: auto;
      }

      .hero-layout h1 {
        margin: 0;
        color: #f8fafc;
        max-width: 720px;
        font-size: clamp(36px, 4.2vw, 56px);
        line-height: 1.04;
        font-weight: 900;
        word-break: keep-all;
      }

      .hero-subtitle {
        max-width: 580px;
        margin: 18px 0 30px;
        color: rgba(226, 232, 240, 0.78);
        font-size: 18px;
        line-height: 1.7;
      }

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

      .hero-button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 168px;
        min-height: 48px;
        padding: 13px 28px;
        border-radius: 10px;
        color: #fff;
        font-weight: 800;
        text-decoration: none;
        transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      }

      .hero-button:hover {
        transform: translateY(-2px);
      }

      .hero-button-primary {
        background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
        box-shadow: 0 10px 24px rgba(245, 158, 11, 0.28);
      }

      .hero-button-secondary {
        background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%);
        box-shadow: 0 10px 24px rgba(34, 197, 94, 0.22);
      }

      .hero-visual {
        position: relative;
      }

      .hero-showcase {
        position: relative;
        min-height: 320px;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        border-radius: 22px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        background:
          linear-gradient(145deg, rgba(15, 23, 42, 0.22), rgba(15, 23, 42, 0.84)),
          radial-gradient(circle at 70% 34%, rgba(245, 158, 11, 0.28), transparent 42%);
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
      }

      .hero-showcase::before {
        content: "";
        position: absolute;
        inset: 14px;
        border-radius: 18px;
        border: 1px solid rgba(255, 255, 255, 0.08);
        pointer-events: none;
      }

      .showcase-image {
        width: 100%;
        height: 320px;
        display: block;
        object-fit: cover;
        opacity: 0.82;
        filter: saturate(1.08) contrast(1.08);
      }

      .showcase-panel {
        position: absolute;
        left: 22px;
        bottom: 22px;
        min-width: 230px;
        padding: 16px 18px;
        text-align: left;
        color: #fff;
        border-radius: 16px;
        background: rgba(2, 6, 23, 0.72);
        border: 1px solid rgba(245, 158, 11, 0.28);
        backdrop-filter: blur(10px);
        box-shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
      }

      .showcase-panel span {
        display: block;
        color: #fbbf24;
        font-size: 13px;
        font-weight: 800;
      }

      .showcase-panel strong {
        display: block;
        margin-top: 4px;
        font-size: 24px;
        line-height: 1.1;
      }

      .showcase-panel em {
        display: block;
        margin-top: 8px;
        color: rgba(226, 232, 240, 0.78);
        font-size: 13px;
        font-style: normal;
      }

      .showcase-logo-strip {
        position: absolute;
        right: 20px;
        top: 20px;
        display: flex;
        gap: 8px;
        padding: 8px;
        border-radius: 999px;
        background: rgba(2, 6, 23, 0.66);
        border: 1px solid rgba(255, 255, 255, 0.12);
        backdrop-filter: blur(10px);
      }

      .showcase-logo-strip img {
        width: 46px;
        height: 34px;
        object-fit: contain;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.9);
        padding: 4px;
      }

      .hero-slider {
        position: relative;
        height: 260px;
        padding: 10px;
        overflow: hidden;
        border-radius: 18px;
        background: rgba(2, 6, 23, 0.72);
        border: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.32);
      }

      .hero-slider#slider-container {
        height: 260px;
        padding: 10px;
      }

      .hero-slider img {
        width: 100%;
        height: 100%;
        display: block;
        object-fit: cover;
        border-radius: 12px;
        transition: opacity 0.35s ease;
      }

      .slider-control {
        position: absolute;
        top: 50%;
        width: 38px;
        height: 38px;
        display: grid;
        place-items: center;
        color: #fff;
        border: 0;
        border-radius: 999px;
        background: rgba(15, 23, 42, 0.58);
        transform: translateY(-50%);
        cursor: pointer;
      }

      #prev-slide.slider-control,
      #next-slide.slider-control {
        transform: translateY(-50%);
      }

      .slider-control svg {
        width: 22px;
        height: 22px;
      }

      .slider-control-prev {
        left: 22px;
      }

      .slider-control-next {
        right: 22px;
      }

      .slider-dots {
        position: absolute;
        left: 50%;
        bottom: 18px;
        display: flex;
        gap: 8px;
        transform: translateX(-50%);
      }

      .hero-badge {
        position: absolute;
        right: 28px;
        bottom: -34px;
        min-width: 250px;
        padding: 16px 18px;
        color: #fff;
        text-align: left;
        border-radius: 14px;
        background: linear-gradient(135deg, rgba(245, 158, 11, 0.94), rgba(217, 119, 6, 0.9));
        box-shadow: 0 18px 36px rgba(245, 158, 11, 0.22);
      }

      .hero-badge strong {
        display: block;
        font-size: 28px;
        line-height: 1;
      }

      .hero-badge span {
        display: block;
        margin-top: 6px;
        font-size: 14px;
      }

      .section-title {
        display: flex;
        align-items: end;
        justify-content: space-between;
        gap: 16px;
        margin: 46px 0 18px;
      }

      .section-title span {
        color: #f59e0b;
        font-size: 14px;
        font-weight: 800;
      }

      .section-title h2 {
        margin: 0;
        color: #f8fafc;
        font-size: 28px;
        font-weight: 900;
      }

      .platform-grid {
        display: grid;
        grid-template-columns: 1fr 1.14fr 1fr;
        gap: 14px;
      }

      .platform-card {
        min-height: 154px;
        display: flex;
        align-items: center;
        gap: 18px;
        padding: 16px;
        border-radius: 16px;
        border: 1px solid rgba(245, 158, 11, 0.18);
        background: rgba(15, 23, 42, 0.68);
        box-shadow: 0 12px 34px rgba(0, 0, 0, 0.2);
        backdrop-filter: blur(10px);
        transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
      }

      .platform-card:hover {
        transform: translateY(-4px);
        border-color: rgba(245, 158, 11, 0.48);
        background: rgba(30, 41, 59, 0.82);
      }

      .platform-card-featured {
        grid-row: span 2;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
      }

      .platform-logo {
        flex: 0 0 118px;
        height: 96px;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.92);
      }

      .platform-card-featured .platform-logo {
        width: 100%;
        height: 148px;
        flex-basis: auto;
      }

      .platform-logo-dark {
        background: #020617;
      }

      .platform-logo img {
        max-width: 86%;
        max-height: 82%;
        object-fit: contain;
      }

      .platform-info {
        min-width: 0;
        flex: 1;
        text-align: left;
      }

      .platform-info h3 {
        margin: 0 0 8px;
        color: #fff;
        font-size: 22px;
        line-height: 1.15;
        font-weight: 900;
      }

      .platform-info p {
        margin: 0 0 16px;
        color: rgba(226, 232, 240, 0.68);
        font-size: 14px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .platform-actions {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
      }

      .platform-actions a,
      .download-card a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 34px;
        padding: 8px 14px;
        color: #fff;
        font-size: 13px;
        font-weight: 800;
        text-decoration: none;
        border-radius: 999px;
      }

      .platform-actions .web-link {
        background: linear-gradient(135deg, #2563eb, #3b82f6);
      }

      .platform-actions .app-link {
        background: linear-gradient(135deg, #16a34a, #22c55e);
      }

      .download-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
      }

      .download-card {
        min-height: 148px;
        position: relative;
        overflow: hidden;
        padding: 22px;
        text-align: left;
        border-radius: 16px;
        box-shadow: 0 16px 38px rgba(0, 0, 0, 0.26);
      }

      .download-card::after {
        content: "";
        position: absolute;
        right: -32px;
        bottom: -44px;
        width: 150px;
        height: 150px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.14);
      }

      .download-card h3,
      .download-card p,
      .download-card a {
        position: relative;
        z-index: 1;
      }

      .download-card h3 {
        margin: 0 0 8px;
        color: #fff;
        font-size: 22px;
        font-weight: 900;
      }

      .download-card p {
        margin: 0 0 20px;
        color: rgba(255, 255, 255, 0.82);
      }

      .download-card a {
        background: rgba(255, 255, 255, 0.18);
        border: 1px solid rgba(255, 255, 255, 0.22);
      }

      .download-card-blue {
        background: linear-gradient(135deg, #1d4ed8, #0f172a);
      }

      .download-card-green {
        background: linear-gradient(135deg, #16a34a, #14532d);
      }

      .download-card-gold {
        background: linear-gradient(135deg, #d97706, #7c2d12);
      }

      .landing-footer {
        padding: 46px 0 0;
        text-align: center;
        color: rgba(148, 163, 184, 0.78);
      }

      .landing-footer p {
        margin: 0 0 10px;
        color: rgba(203, 213, 225, 0.88);
        font-weight: 800;
      }

      .landing-footer span {
        font-size: 12px;
      }

      @media (max-width: 980px) {
        .hero-layout {
          grid-template-columns: 1fr;
          padding: 24px;
        }

        .hero-slider {
          height: 220px;
        }

        .hero-showcase {
          min-height: 260px;
        }

        .showcase-image {
          height: 260px;
        }

        .hero-badge {
          right: 18px;
          bottom: -22px;
        }

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

        .platform-card-featured {
          grid-row: auto;
          flex-direction: row;
        }

        .platform-card-featured .platform-logo {
          width: auto;
          height: 96px;
          flex: 0 0 118px;
        }

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

      @media (max-width: 560px) {
        .landing-shell {
          padding: 22px 14px 42px;
        }

        .hero-layout {
          padding: 18px;
          border-radius: 14px;
        }

        .hero-nav {
          display: grid;
          grid-template-columns: repeat(4, minmax(0, 1fr));
          gap: 6px;
          margin-bottom: 18px;
        }

        .hero-nav span {
          padding: 6px 4px;
          text-align: center;
          font-size: 12px;
        }

        .brand-kicker img {
          height: 28px;
        }

        .hero-layout h1 {
          font-size: 30px;
          line-height: 1.14;
          word-break: normal;
        }

        .hero-subtitle {
          font-size: 15px;
          margin-bottom: 20px;
        }

        .hero-actions {
          display: grid;
          grid-template-columns: 1fr;
        }

        .hero-button {
          width: 100%;
          min-width: 0;
        }

        .hero-slider {
          height: 156px;
        }

        .hero-showcase {
          min-height: 230px;
        }

        .showcase-image {
          height: 230px;
        }

        .showcase-panel {
          left: 14px;
          right: 14px;
          bottom: 14px;
          min-width: 0;
        }

        .showcase-logo-strip {
          right: 14px;
          top: 14px;
        }

        .hero-badge {
          position: static;
          min-width: 0;
          margin-top: 12px;
        }

        .section-title {
          margin-top: 32px;
        }

        .platform-card,
        .platform-card-featured {
          gap: 14px;
          padding: 14px;
          flex-direction: row;
        }

        .platform-logo,
        .platform-card-featured .platform-logo {
          flex: 0 0 104px;
          height: 82px;
        }

        .platform-info h3 {
          font-size: 18px;
        }

        .platform-actions {
          display: grid;
          grid-template-columns: 1fr;
        }
      }

      /* Reference-style layout pass */
      .landing-shell {
        padding-top: 0;
        background:
          linear-gradient(180deg, rgba(13, 34, 58, 0.92) 0%, rgba(34, 79, 118, 0.84) 48%, rgba(13, 34, 58, 0.96) 100%),
          url("../img/bg-fwc-original.jpg");
        background-size: cover;
        background-position: center bottom;
        background-attachment: fixed;
      }

      .landing-shell::before {
        background: linear-gradient(180deg, rgba(15, 23, 42, 0.72), rgba(15, 23, 42, 0.2), rgba(15, 23, 42, 0.76));
        mask-image: none;
      }

      .hero-layout {
        min-height: 520px;
        grid-template-columns: minmax(0, 640px) minmax(320px, 1fr);
        padding: 80px 0 70px;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
        backdrop-filter: none;
      }

      .hero-nav {
        margin-bottom: 30px;
      }

      .hero-nav span {
        border: 0;
        background: transparent;
        padding: 0;
        color: rgba(255, 255, 255, 0.72);
      }

      .hero-layout h1 {
        max-width: 760px;
        font-size: clamp(42px, 4.4vw, 58px);
        line-height: 1.16;
      }

      .hero-subtitle {
        margin-top: 12px;
        margin-bottom: 30px;
      }

      .hero-button {
        border-radius: 8px;
      }

      .hero-showcase {
        min-height: 360px;
        overflow: visible;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
      }

      .hero-showcase::before {
        display: none;
      }

      .showcase-image {
        width: min(520px, 100%);
        height: 300px;
        border-radius: 18px;
        opacity: 0.95;
        box-shadow: 0 24px 62px rgba(0, 0, 0, 0.34);
      }

      .showcase-panel {
        left: auto;
        right: 6px;
        bottom: 10px;
        min-width: 210px;
        background: linear-gradient(135deg, rgba(245, 158, 11, 0.96), rgba(217, 119, 6, 0.92));
        border: 0;
      }

      .showcase-panel span,
      .showcase-panel em {
        color: rgba(255, 255, 255, 0.88);
      }

      .showcase-logo-strip {
        right: 12px;
        top: 22px;
      }

      .section-title {
        display: none;
      }

      .platform-section {
        padding: 0 0 16px;
      }

      .platform-grid {
        grid-template-columns: 1fr 290px 1fr;
        gap: 12px;
      }

      .platform-card {
        min-height: 144px;
        padding: 12px;
        gap: 18px;
        border-color: rgba(245, 158, 11, 0.2);
        background: rgba(30, 58, 95, 0.7);
      }

      .platform-card-featured {
        min-height: 300px;
        grid-row: span 2;
        flex-direction: column;
        align-items: stretch;
      }

      .platform-card-featured .platform-logo {
        height: 142px;
      }

      .platform-logo {
        flex-basis: 120px;
        height: 120px;
        background: rgba(255, 255, 255, 0.08);
      }

      .platform-logo:not(.platform-logo-dark) {
        background: rgba(255, 255, 255, 0.92);
      }

      .platform-info h3 {
        font-size: 24px;
      }

      .platform-actions a {
        min-height: 32px;
        border-radius: 8px;
      }

      .download-section {
        padding-bottom: 80px;
      }

      .download-grid {
        display: flex;
        gap: 12px;
      }

      .download-card {
        flex: 1;
        min-width: 0;
        min-height: 180px;
        transition: flex 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
      }

      .download-card:hover {
        flex: 1.6;
        transform: translateY(-4px);
      }

      @media (max-width: 1024px) {
        .hero-layout {
          grid-template-columns: 1fr;
          padding: 60px 42px;
        }

        .hero-showcase {
          min-height: 260px;
        }

        .showcase-image {
          width: 100%;
          height: 260px;
        }

        .platform-grid,
        .download-grid {
          display: flex;
          flex-direction: column;
        }

        .platform-card-featured {
          min-height: 144px;
          flex-direction: row;
        }

        .platform-card-featured .platform-logo {
          width: auto;
          height: 120px;
          flex: 0 0 120px;
        }

        .download-card,
        .download-card:hover {
          flex: none;
        }
      }

      @media (max-width: 768px) {
        .landing-shell {
          padding: 0 16px 42px;
          background-attachment: scroll;
        }

        .hero-layout {
          padding: 30px 0;
          gap: 28px;
        }

        .hero-nav {
          display: flex;
          justify-content: space-between;
          gap: 4px;
          flex-wrap: nowrap;
        }

        .hero-nav span {
          font-size: 13px;
        }

        .hero-layout h1 {
          font-size: 24px;
          text-align: center;
        }

        .hero-subtitle {
          text-align: center;
          font-size: 16px;
        }

        .hero-actions {
          grid-template-columns: 1fr;
        }

        .hero-showcase,
        .showcase-image {
          min-height: 220px;
          height: 220px;
        }

        .showcase-panel {
          left: 14px;
          right: 14px;
          bottom: 14px;
        }

        .platform-card,
        .platform-card-featured {
          min-height: 0;
          padding: 16px;
          flex-direction: row;
        }

        .platform-logo,
        .platform-card-featured .platform-logo {
          flex: 0 0 100px;
          height: 70px;
        }

        .platform-info h3 {
          font-size: 16px;
        }

        .platform-info p {
          font-size: 13px;
        }

        .download-card {
          min-height: 120px;
        }
      }

      /* 1:1 reference draft */
      .landing-shell {
        min-height: 100vh;
        padding: 0 20px 0;
        background:
          linear-gradient(180deg, rgba(13, 36, 66, 0.18) 0%, rgba(13, 36, 66, 0.12) 46%, rgba(13, 36, 66, 0.22) 100%),
          url("../img/bg-fwc-original.jpg");
        background-size: cover;
        background-position: bottom center;
        background-attachment: fixed;
      }

      .landing-shell::before {
        background: rgba(10, 28, 52, 0.08);
      }

      .hero-layout,
      .platform-section,
      .download-section,
      .landing-footer {
        max-width: 1200px;
      }

      .hero-layout {
        min-height: 0;
        grid-template-columns: 1fr 360px;
        align-items: center;
        gap: 40px;
        padding: 80px 0;
        background: transparent;
        border: 0;
        box-shadow: none;
      }

      .hero-content {
        max-width: 680px;
      }

      .hero-nav {
        gap: 20px;
        margin-bottom: 30px;
      }

      .hero-nav span {
        padding: 0;
        border: 0;
        border-radius: 0;
        background: transparent;
        color: rgba(255, 255, 255, 0.9);
        font-size: 14px;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
      }

      .hero-layout h1 {
        max-width: 700px;
        font-size: 48px;
        line-height: 1.2;
        color: #fff;
        text-shadow: 0 3px 16px rgba(0, 0, 0, 0.42);
      }

      .hero-subtitle {
        margin: 0 0 30px;
        color: rgba(255, 255, 255, 0.96);
        font-size: 16px;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.36);
      }

      .hero-actions {
        display: flex;
        justify-content: flex-start;
        gap: 10px;
      }

      .hero-button {
        min-width: 0;
        min-height: 50px;
        padding: 14px 32px;
        border-radius: 8px;
        font-size: 16px;
        background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
        box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
      }

      .hero-button-secondary {
        background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
      }

      .hero-visual {
        position: relative;
        min-height: 320px;
      }

      .hero-image {
        position: absolute;
        right: 15px;
        bottom: -120px;
        width: 360px;
        filter: drop-shadow(0 20px 40px rgba(245, 158, 11, 0.4));
      }

      .hero-image img {
        display: block;
        width: 100%;
        height: auto;
        border-radius: 18px;
      }

      .platform-section {
        padding: 0 0 0;
      }

      .platform-grid {
        display: grid;
        grid-template-columns: 1fr 290px 1fr;
        gap: 12px;
      }

      .platform-card {
        min-height: 144px;
        display: flex;
        align-items: center;
        gap: 20px;
        padding: 12px;
        border-radius: 16px;
        border: 1px solid rgba(255, 255, 255, 0.16);
        background: rgba(22, 55, 92, 0.76);
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
        cursor: pointer;
      }

      .platform-card:nth-child(2) {
        grid-row: span 2;
        min-height: 300px;
        flex-direction: column;
        align-items: stretch;
      }

      .platform-card:nth-child(2) .platform-logo {
        width: 100%;
        height: 138px;
        flex-basis: auto;
      }

      .platform-card:nth-child(2) .platform-logo img {
        max-width: 92%;
        opacity: 0.94;
      }

      .platform-logo {
        flex: 0 0 120px;
        width: 120px;
        height: 120px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.08);
      }

      .platform-logo.platform-logo-clear {
        background: transparent;
      }

      .platform-logo.platform-logo-dark {
        background: rgba(5, 17, 31, 0.72);
      }

      .platform-info h3 {
        margin-bottom: 6px;
        font-size: 24px;
        font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
      }

      .platform-card:nth-child(2) .platform-info h3 {
        font-size: 22px;
        font-weight: 700;
        color: rgba(255, 255, 255, 0.92);
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
      }

      .platform-info p {
        margin-bottom: 4px;
        color: rgba(255, 255, 255, 0.86);
      }

      .platform-actions {
        margin-top: 10px;
      }

      .platform-actions a {
        min-height: 32px;
        border-radius: 8px;
        padding: 7px 12px;
      }

      .download-section {
        padding: 16px 0 80px;
      }

      .download-grid {
        display: flex;
        gap: 12px;
        padding: 10px 0;
      }

      .download-card {
        flex: 1;
        min-width: 0;
        min-height: 180px;
        border-radius: 16px;
        padding: 12px;
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      }

      .download-card:hover {
        flex: 2;
        box-shadow: 0 16px 40px rgba(245, 158, 11, 0.4);
      }

      .download-card-violet {
        background: linear-gradient(135deg, #8644c6 0%, #7c3aed 100%);
      }

      .download-card-red {
        background: linear-gradient(135deg, #b01e1e 0%, #991b1b 100%);
      }

      @media (max-width: 1024px) {
        .hero-layout {
          grid-template-columns: 1fr;
          padding: 60px 42px;
          position: relative;
          overflow: visible;
        }

        .hero-visual {
          position: absolute;
          right: 6%;
          bottom: -120px;
          min-height: 0;
          z-index: 0;
          pointer-events: none;
        }

        .hero-image {
          position: static;
          width: 260px;
        }

        .hero-content {
          position: relative;
          z-index: 1;
        }

        .platform-grid,
        .download-grid {
          display: flex;
          flex-direction: column;
        }

        .platform-card:nth-child(2) {
          min-height: 144px;
          flex-direction: row;
        }

        .platform-card:nth-child(2) .platform-logo {
          width: 120px;
          height: 120px;
          flex: 0 0 120px;
        }

        .download-card,
        .download-card:hover {
          flex: none;
        }
      }

      @media (max-width: 768px) {
        .landing-shell {
          padding: 0 16px 0;
          background-attachment: scroll;
        }

        .hero-layout {
          padding: 30px 0;
          gap: 20px;
        }

        .hero-content {
          text-align: center;
        }

        .hero-nav {
          flex-wrap: nowrap;
          justify-content: space-between;
          gap: 2px;
        }

        .hero-nav span {
          font-size: 13px;
        }

        .hero-layout h1 {
          font-size: 24px;
          text-align: center;
        }

        .hero-subtitle {
          font-size: 16px;
          text-align: center;
        }

        .hero-actions {
          justify-content: center;
        }

        .hero-button {
          width: auto;
          padding: 12px 28px;
          font-size: 14px;
        }

        .hero-visual {
          right: 1%;
          bottom: -55px;
          min-height: 0;
        }

        .hero-image {
          position: static;
          width: 180px;
        }

        .platform-card {
          padding: 16px;
          gap: 16px;
        }

        .platform-logo,
        .platform-card:nth-child(2) .platform-logo {
          flex: 0 0 100px;
          width: 100px;
          height: 60px;
        }

        .platform-info h3 {
          font-size: 16px;
        }

        .platform-info p {
          font-size: 13px;
        }

        .download-card {
          min-height: 120px;
          padding: 20px;
        }
      }

      /* 8-card platform matrix */
      .platform-section {
        padding: 0 0 0;
      }

      .platform-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
      }

      .platform-card,
      .platform-card:nth-child(2),
      .platform-card-featured {
        min-height: 168px;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 16px;
        padding: 14px;
        grid-row: auto;
      }

      .platform-card:nth-child(2) {
        border-color: rgba(245, 158, 11, 0.5);
        box-shadow: 0 14px 32px rgba(245, 158, 11, 0.14);
      }

      .platform-logo,
      .platform-card:nth-child(2) .platform-logo,
      .platform-card-featured .platform-logo {
        flex: 0 0 104px;
        width: 104px;
        height: 104px;
      }

      .platform-card:nth-child(2) .platform-logo img {
        max-width: 92%;
        opacity: 1;
      }

      .platform-info {
        min-width: 0;
      }

      .platform-info h3,
      .platform-card:nth-child(2) .platform-info h3 {
        font-size: 22px;
        font-weight: 800;
      }

      .platform-info p {
        font-size: 14px;
        white-space: nowrap;
      }

      .platform-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }

      .platform-actions a {
        min-height: 34px;
        padding: 8px 12px;
        font-size: 14px;
        white-space: nowrap;
      }

      .platform-logo-placeholder {
        display: grid;
        place-items: center;
        background: rgba(7, 22, 40, 0.68);
        border: 1px dashed rgba(255, 255, 255, 0.26);
      }

      .platform-logo-placeholder span {
        color: rgba(255, 255, 255, 0.78);
        font-size: 20px;
        font-weight: 800;
      }

      .platform-card-reserved {
        border-style: dashed;
        background: rgba(22, 55, 92, 0.58);
      }

      @media (max-width: 1180px) {
        .platform-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }
      }

      @media (max-width: 768px) {
        .platform-grid {
          grid-template-columns: 1fr;
        }

        .platform-card,
        .platform-card:nth-child(2),
        .platform-card-featured {
          min-height: 132px;
          padding: 14px;
        }

        .platform-logo,
        .platform-card:nth-child(2) .platform-logo,
        .platform-card-featured .platform-logo {
          flex-basis: 96px;
          width: 96px;
          height: 72px;
        }
      }

      /* Desktop balanced view: compact enough for PC, but not cramped */
      @media (min-width: 1181px) {
        .landing-shell {
          padding: 0 20px 30px;
        }

        .hero-layout {
          padding: 48px 0 36px;
          gap: 34px;
        }

        .hero-nav {
          margin-bottom: 22px;
        }

        .hero-layout h1 {
          max-width: 700px;
          font-size: clamp(42px, 3.9vw, 54px);
          line-height: 1.15;
        }

        .hero-subtitle {
          margin-bottom: 26px;
          font-size: 16px;
        }

        .hero-button {
          min-height: 48px;
          padding: 13px 30px;
          font-size: 15px;
        }

        .hero-visual {
          min-height: 300px;
        }

        .hero-image {
          right: 24px;
          bottom: -92px;
          width: 340px;
        }

        .section-title {
          display: none;
        }

        .platform-section {
          padding-top: 0;
        }

        .platform-grid {
          gap: 12px;
        }

        .platform-card,
        .platform-card:nth-child(2),
        .platform-card-featured {
          min-height: 138px;
          gap: 14px;
          padding: 14px;
          border-radius: 14px;
        }

        .platform-logo,
        .platform-card:nth-child(2) .platform-logo,
        .platform-card-featured .platform-logo {
          flex: 0 0 92px;
          width: 92px;
          height: 92px;
          border-radius: 10px;
        }

        .platform-info h3,
        .platform-card:nth-child(2) .platform-info h3 {
          margin-bottom: 5px;
          font-size: 20px;
        }

        .platform-info p {
          margin-bottom: 4px;
          font-size: 13px;
        }

        .platform-actions {
          margin-top: 9px;
          gap: 8px;
        }

        .platform-actions a {
          min-height: 32px;
          padding: 7px 12px;
          border-radius: 7px;
          font-size: 13px;
        }

        .download-section {
          padding: 18px 0 26px;
        }

        .download-grid {
          gap: 10px;
          padding: 0;
        }

        .download-card {
          min-height: 136px;
          padding: 16px;
          border-radius: 14px;
        }

        .download-card:hover {
          flex: 1;
          box-shadow: 0 12px 28px rgba(245, 158, 11, 0.24);
        }

        .download-card h3 {
          margin-bottom: 7px;
          font-size: 22px;
        }

        .download-card p {
          margin-bottom: 18px;
          font-size: 14px;
        }

        .download-card a {
          min-height: 34px;
          padding: 8px 18px;
          font-size: 14px;
        }

        .landing-footer {
          padding-top: 8px;
          font-size: 12px;
        }

        .landing-footer p {
          margin-bottom: 4px;
        }
      }