:root {
        --carbon: #1d2427;
        --steel: #4b565a;
        --slate: #687276;
        --paper: #f4f3ef;
        --white: #fff;
        --orange: #F07922;
        --orange-dark: #A7460B;
        --line: #d9dedb;
        --max: 112.5rem;
      }
      * {
        box-sizing: border-box;
      }
      html {
        scroll-behavior: auto;
      }
      body {
        min-width: 0;
        margin: 0;
        color: var(--carbon);
        background: var(--paper);
        font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
        -webkit-font-smoothing: antialiased;
      }
      a {
        color: inherit;
        text-decoration: none;
      }
      button {
        font: inherit;
      }
      img {
        display: block;
        max-width: 100%;
      }
      section {
        scroll-margin-top: 5.25rem;
      }
      #top {
        scroll-margin-top: 5.125rem;
      }
      .shell {
        width: min(var(--max), calc(100% - 7rem));
        margin: 0 auto;
      }

      .header {
        position: sticky;
        top: 0;
        z-index: 50;
        height: 5.125rem;
        color: var(--white);
        background: rgba(23, 27, 29, 0.97);
        border-bottom: 1px solid rgba(255, 255, 255, 0.13);
      }
      .header .shell {
        height: 100%;
        display: flex;
        align-items: center;
      }
      .brand {
        display: flex;
        align-items: center;
        gap: 0.875rem;
        min-width: 15.4375rem;
      }
      .brand img {
        width: 4.0625rem;
        height: 3.25rem;
        padding: 0.1875rem;
        object-fit: contain;
        background: #fff;
      }
      .brand-title {
        display: block;
        color: #fff;
        font-size: 1.3125rem;
        line-height: 1;
        font-weight: 800;
        letter-spacing: 0.16em;
      }
      .brand-subtitle {
        display: block;
        margin-top: 0.4375rem;
        color: #9ba5a8;
        font-size: 0.625rem;
        line-height: 1.2;
        letter-spacing: 0.14em;
        text-transform: uppercase;
      }
      .nav {
        display: flex;
        align-items: center;
        gap: 1.9375rem;
        margin-left: auto;
      }
      .nav a {
        position: relative;
        padding: 2rem 0 1.8125rem;
        color: #d5dadd;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        white-space: nowrap;
      }
      .nav a:after {
        content: "";
        position: absolute;
        right: 0;
        bottom: 1.25rem;
        left: 0;
        height: 2px;
        background: var(--orange);
        transform: scaleX(0);
        transition: transform 0.2s ease;
        transform-origin: right;
      }
      .nav a:hover:where(:not(.rh-hover-reset)) {
        color: #fff;
      }
      .nav a:hover:where(:not(.rh-hover-reset)):after {
        transform: scaleX(1);
        transform-origin: left;
      }
      .language {
        display: flex;
        gap: 0.375rem;
        margin-left: 0.125rem;
        padding-left: 1.375rem;
        border-left: 1px solid #536064;
      }
      .language button {
        border: 0;
        padding: 0.4375rem 0.375rem;
        color: #aab4b7;
        background: transparent;
        cursor: pointer;
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.08em;
      }
      .language button.active {
        color: var(--orange);
      }

      .hero {
        position: relative;
        min-height: 42.75rem;
        overflow: hidden;
        color: #fff;
        background: #14191b;
      }
      .hero-photo {
        position: absolute;
        inset: 0 0 0 40%;
        overflow: hidden;
      }
      .hero-photo img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
        filter: saturate(0.62) contrast(1.08) brightness(0.76);
      }
      .hero-photo:before {
        content: "";
        position: absolute;
        z-index: 1;
        inset: 0;
        background: linear-gradient(
          90deg,
          #14191b 0%,
          rgba(20, 25, 27, 0.9) 9%,
          rgba(20, 25, 27, 0.14) 60%
        );
      }
      .hero-photo:after {
        content: "";
        position: absolute;
        z-index: 2;
        inset: 0;
        opacity: 0.28;
        background: repeating-linear-gradient(
          90deg,
          transparent 0 4.1875rem,
          rgba(255, 255, 255, 0.28) 4.1875rem 4.25rem
        );
        mix-blend-mode: soft-light;
      }
      .hero .shell {
        position: relative;
        z-index: 3;
        min-height: 42.75rem;
        padding: 6.625rem 0 4rem;
        display: flex;
        flex-direction: column;
        justify-content: center;
      }
      .section-code {
        display: flex;
        align-items: center;
        gap: 0.8125rem;
        color: var(--orange);
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.19em;
        text-transform: uppercase;
      }
      .section-code:before {
        content: "";
        width: 2.125rem;
        height: 2px;
        background: var(--orange);
      }
      .hero h1 {
        max-width: 47.5rem;
        margin: 1.5rem 0 1.3125rem;
        font-size: 4.25rem;
        line-height: 1.04;
        font-weight: 760;
        letter-spacing: -0.035em;
      }
      .hero p {
        max-width: 31.25rem;
        margin: 0;
        color: #d1d8d8;
        font-size: 1.0625rem;
        line-height: 1.75;
      }
      .hero-actions {
        display: flex;
        align-items: center;
        gap: 0.8125rem;
        margin-top: 2.1875rem;
      }
      .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 9.625rem;
        height: 3rem;
        padding: 0 1.25rem;
        color: #fff;
        border: 1px solid var(--orange);
        background: var(--orange);
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.11em;
        text-transform: uppercase;
        transition:
          transform 0.18s ease,
          background 0.18s ease;
      }
      .button:hover:where(:not(.rh-hover-reset)) {
        background: var(--orange-dark);
        transform: translateY(-0.125rem);
      }
      .button.ghost {
        border-color: rgba(255, 255, 255, 0.54);
        background: transparent;
      }
      .button.ghost:hover:where(:not(.rh-hover-reset)) {
        border-color: var(--orange);
        background: transparent;
      }
      .hero-index {
        position: absolute;
        right: 0;
        bottom: 3.5rem;
        display: flex;
        align-items: center;
        gap: 0.9375rem;
        color: #dee3e3;
        font-size: 0.625rem;
        font-weight: 800;
        letter-spacing: 0.15em;
      }
      .hero-index:before {
        content: "";
        width: 6.25rem;
        height: 1px;
        background: var(--orange);
      }
      .hero-rail {
        position: absolute;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 4;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        border-top: 1px solid rgba(255, 255, 255, 0.28);
        background: rgba(15, 19, 20, 0.64);
      }
      .hero-rail a {
        display: flex;
        align-items: center;
        gap: 0.875rem;
        min-height: 4.875rem;
        padding: 0 1.75rem;
        color: #fff;
        border-right: 1px solid rgba(255, 255, 255, 0.18);
        transition: background 0.2s ease;
      }
      .hero-rail a:last-child { border-right: 0; }
      .hero-rail a:hover:where(:not(.rh-hover-reset)) { background: rgba(238, 109, 32, 0.18); }
      .hero-rail svg { width: 1.4375rem; height: 1.4375rem; color: #ff9b5b; stroke-width: 1.5; flex: 0 0 auto; }
      .hero-rail strong { display: block; font-size: 0.8125rem; line-height: 1.3; }
      .hero-rail small { display: block; margin-top: 0.25rem; color: #b9c2c3; font-size: 0.6875rem; line-height: 1.35; }
      .hero-side {
        position: absolute;
        right: 1.0625rem;
        top: 13.375rem;
        z-index: 4;
        color: #d6dcdc;
        font-size: 0.625rem;
        font-weight: 800;
        letter-spacing: 0.17em;
        writing-mode: vertical-rl;
        transform: rotate(180deg);
      }

      .section {
        padding: 7rem 0;
      }
      .section.white {
        background: #fff;
      }
      .section.dark {
        color: #fff;
        background: var(--carbon);
      }
      .heading {
        display: grid;
        grid-template-columns: 1fr 17.8125rem;
        gap: 4.375rem;
        align-items: end;
        margin-bottom: 3.125rem;
      }
      .heading h2 {
        max-width: 45rem;
        margin: 0.8125rem 0 0;
        font-size: 2.6875rem;
        line-height: 1.13;
        font-weight: 750;
        letter-spacing: -0.025em;
      }
      .heading-note {
        margin: 0 0 0.25rem;
        color: var(--slate);
        font-size: 0.8125rem;
        line-height: 1.7;
      }
      .dark .heading-note {
        color: #aab4b6;
      }

      .scope-grid {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr 0.8fr;
        grid-template-rows: 16.25rem 16.25rem;
        gap: 1rem;
      }
      .scope-card {
        position: relative;
        display: flex;
        overflow: hidden;
        color: #fff;
        background: var(--steel);
      }
      .scope-card:first-child {
        grid-row: 1 / span 2;
      }
      .scope-card img {
        position: absolute;
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: saturate(0.62) contrast(1.04) brightness(0.65);
        transition:
          transform 0.55s cubic-bezier(0.2, 0.7, 0.2, 1),
          filter 0.3s ease;
      }
      .scope-card:after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          180deg,
          rgba(16, 20, 21, 0.06) 23%,
          rgba(16, 20, 21, 0.88) 100%
        );
      }
      .scope-card:hover:where(:not(.rh-hover-reset)) img {
        filter: saturate(0.9) contrast(1.03) brightness(0.78);
        transform: scale(1.055);
      }
      .scope-card:nth-child(3) img {
        object-position: 50% 44%;
      }
      .scope-card:nth-child(4) img {
        object-position: center 35%;
      }
      .scope-content {
        position: relative;
        z-index: 1;
        align-self: flex-end;
        width: 100%;
        padding: 1.5625rem;
      }
      .scope-number {
        display: block;
        margin-bottom: 0.8125rem;
        color: var(--orange);
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.14em;
      }
      .scope-content h3 {
        margin: 0;
        font-size: 1.375rem;
        line-height: 1.2;
      }
      .scope-content p {
        max-width: 18.125rem;
        margin: 0.625rem 0 0;
        color: #dde2e2;
        font-size: 0.75rem;
        line-height: 1.58;
      }
      .scope-card:first-child h3 {
        font-size: 1.875rem;
      }

      .about-layout {
        display: grid;
        grid-template-columns: 0.94fr 1.06fr;
        gap: 4.875rem;
        align-items: center;
      }
      .about-layout h2 {
        margin: 0.9375rem 0 1.375rem;
        font-size: 2.6875rem;
        line-height: 1.14;
        letter-spacing: -0.025em;
      }
      .about-layout p {
        max-width: 31.875rem;
        margin: 0;
        color: #485255;
        font-size: 1.0625rem;
        line-height: 1.85;
      }
      .about-link {
        display: inline-flex;
        align-items: center;
        gap: 0.75rem;
        margin-top: 2rem;
        padding-bottom: 0.4375rem;
        color: var(--carbon);
        border-bottom: 2px solid var(--orange);
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.11em;
        text-transform: uppercase;
      }
      .about-link span {
        color: var(--orange-dark);
        font-size: 1.125rem;
        line-height: 0.6;
      }
      .about-visual {
        position: relative;
        min-height: 26.5rem;
        overflow: hidden;
        background: #394247;
      }
      .about-visual img {
        width: 100%;
        height: 26.5rem;
        object-fit: cover;
        object-position: 48% center;
        filter: saturate(0.55) contrast(1.05) brightness(0.77);
      }
      .about-visual:after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          135deg,
          rgba(23, 27, 29, 0.16) 40%,
          rgba(23, 27, 29, 0.7)
        );
      }
      .image-tag {
        position: absolute;
        z-index: 1;
        top: 0;
        left: 0;
        padding: 0.6875rem 0.9375rem;
        color: #fff;
        background: var(--orange);
        font-size: 0.625rem;
        font-weight: 800;
        letter-spacing: 0.14em;
        text-transform: uppercase;
      }
      .image-caption {
        position: absolute;
        z-index: 1;
        right: 1.5rem;
        bottom: 1.375rem;
        max-width: 14.375rem;
        color: #fff;
        font-size: 0.75rem;
        font-weight: 600;
        line-height: 1.55;
        text-align: right;
      }

      .capability-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        border-top: 1px solid #485257;
        border-bottom: 1px solid #485257;
      }
      .capability {
        min-height: 15.3125rem;
        padding: 1.8125rem 1.6875rem 1.5625rem 0;
      }
      .capability + .capability {
        padding-left: 1.75rem;
        border-left: 1px solid #485257;
      }
      .cap-icon {
        display: grid;
        place-items: center;
        width: 2.75rem;
        height: 2.75rem;
        color: var(--orange);
        border: 1px solid #687276;
      }
      .cap-icon svg {
        width: 1.3125rem;
        height: 1.3125rem;
        fill: none;
        stroke: currentColor;
        stroke-width: 1.7;
        stroke-linecap: round;
        stroke-linejoin: round;
      }
      .capability h3 {
        margin: 2.5625rem 0 0.5625rem;
        font-size: 1.25rem;
        line-height: 1.3;
      }
      .capability p {
        margin: 0;
        color: #abb5b7;
        font-size: 0.75rem;
        line-height: 1.65;
      }

      .insights {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1.125rem;
      }
      .insight {
        position: relative;
        min-height: 16.625rem;
        padding: 1.875rem 1.75rem;
        overflow: hidden;
        border: 1px solid var(--line);
        background: #fff;
        transition:
          transform 0.2s ease,
          border-color 0.2s ease;
      }
      .insight:hover:where(:not(.rh-hover-reset)) {
        border-color: #afb8b8;
        transform: translateY(-0.25rem);
      }
      .insight:before {
        content: "";
        position: absolute;
        top: 0;
        right: 1.75rem;
        left: 1.75rem;
        height: 0.1875rem;
        background: var(--orange);
      }
      .insight-type {
        color: var(--orange-dark);
        font-size: 0.625rem;
        font-weight: 800;
        letter-spacing: 0.16em;
        text-transform: uppercase;
      }
      .insight h3 {
        max-width: 18.125rem;
        margin: 1.375rem 0 0.875rem;
        font-size: 1.375rem;
        line-height: 1.33;
        letter-spacing: -0.01em;
      }
      .insight p {
        margin: 0;
        color: var(--slate);
        font-size: 0.8125rem;
        line-height: 1.68;
      }
      .insight-arrow {
        position: absolute;
        right: 1.75rem;
        bottom: 1.5625rem;
        color: var(--orange-dark);
        font-size: 1.375rem;
      }

      footer {
        color: #aab4b7;
        background: #111517;
      }
      .footer-top {
        display: grid;
        grid-template-columns: 1.1fr auto auto;
        gap: 3.375rem;
        align-items: start;
        padding: 2.625rem 0 2.125rem;
        border-bottom: 1px solid #364044;
      }
      .footer-brand {
        display: flex;
        align-items: center;
        gap: 0.8125rem;
      }
      .footer-brand img {
        width: 3.625rem;
        height: 2.875rem;
        padding: 0.1875rem;
        background: #fff;
        object-fit: contain;
      }
      .footer-brand strong {
        display: block;
        color: #fff;
        font-size: 1.125rem;
        letter-spacing: 0.16em;
      }
      .footer-brand span {
        display: block;
        margin-top: 0.375rem;
        color: #859093;
        font-size: 0.6875rem;
      }
      .footer-nav {
        display: flex;
        gap: 1.5625rem;
        padding-top: 0.625rem;
      }
      .footer-nav a {
        color: #c9d0d1;
        font-size: 0.75rem;
        white-space: nowrap;
      }
      .footer-nav a:hover:where(:not(.rh-hover-reset)) {
        color: var(--orange);
      }
      .footer-detail {
        padding-top: 0.5625rem;
        color: #aeb7b8;
        font-size: 0.6875rem;
        line-height: 1.65;
        text-align: right;
        white-space: nowrap;
      }
      .footer-bottom {
        display: flex;
        justify-content: space-between;
        gap: 1.875rem;
        padding: 1.25rem 0 1.5625rem;
        color: #758083;
        font-size: 0.625rem;
        letter-spacing: 0.04em;
      }