:root {
    --brand-blue: #1f4f9d;
    --brand-blue-deep: #15386f;
    --brand-blue-bright: #4c7fd4;
    --ink: #172033;
    --ink-soft: #536078;
    --line: #dce5f2;
    --surface: #ffffff;
    --surface-soft: #f4f7fb;
    --surface-blue: #eaf1fb;
    --page-width: 1180px;
    --radius-large: 30px;
    --radius-medium: 18px;
    --shadow-soft: 0 24px 70px rgba(30, 67, 125, 0.12);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 88px;
}

body {
    margin: 0;
    overflow-x: hidden;
    color: var(--ink);
    background: var(--surface);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

@supports (overflow: clip) {
    body {
        overflow-x: clip;
    }
}

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

a {
    color: inherit;
    text-decoration: none;
}

a:focus-visible {
    outline: 3px solid rgba(76, 127, 212, 0.48);
    outline-offset: 5px;
    border-radius: 6px;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1000;
    padding: 10px 16px;
    color: #ffffff;
    background: var(--brand-blue-deep);
    transform: translateY(-160%);
    transition: transform 180ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.page-shell {
    width: min(calc(100% - 48px), var(--page-width));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(220, 229, 242, 0.8);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 48px), var(--page-width));
    min-height: 78px;
    margin-inline: auto;
    gap: 32px;
}

.brand {
    flex: 0 1 265px;
}

.brand img {
    width: 265px;
    height: auto;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: clamp(18px, 3vw, 42px);
    color: #45516a;
    font-size: 15px;
    font-weight: 600;
}

.site-nav a {
    position: relative;
    padding: 25px 0;
    transition: color 180ms ease;
}

.site-nav a::after {
    position: absolute;
    right: 0;
    bottom: 18px;
    left: 0;
    height: 2px;
    background: var(--brand-blue);
    content: "";
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 220ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
    color: var(--brand-blue);
}

.site-nav a:hover::after,
.site-nav a[aria-current="true"]::after {
    transform: scaleX(1);
    transform-origin: left;
}

.hero {
    position: relative;
    isolation: isolate;
    min-height: min(780px, calc(100dvh - 78px));
    overflow: hidden;
    background:
        radial-gradient(circle at 78% 25%, rgba(76, 127, 212, 0.16), transparent 31%),
        linear-gradient(135deg, #ffffff 0%, #f8fafe 47%, #edf3fb 100%);
}

.hero::before {
    position: absolute;
    top: -18%;
    right: -12%;
    z-index: -2;
    width: min(58vw, 820px);
    aspect-ratio: 1;
    border: 1px solid rgba(76, 127, 212, 0.13);
    border-radius: 50%;
    content: "";
}

.hero-orbit {
    position: absolute;
    z-index: -1;
    border: 1px solid rgba(31, 79, 157, 0.12);
    border-radius: 50%;
    pointer-events: none;
}

.hero-orbit-one {
    top: 21%;
    right: 4%;
    width: 370px;
    height: 370px;
}

.hero-orbit-two {
    right: 16%;
    bottom: -150px;
    width: 420px;
    height: 420px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
    align-items: center;
    min-height: min(780px, calc(100dvh - 78px));
    gap: clamp(48px, 7vw, 110px);
    padding-block: clamp(78px, 10vw, 130px);
}

.section-kicker {
    margin: 0 0 20px;
    color: var(--brand-blue);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.16em;
}

.hero h1 {
    max-width: 680px;
    margin: 0;
    color: #14213a;
    font-size: clamp(42px, 4.8vw, 60px);
    font-weight: 720;
    letter-spacing: -0.045em;
    line-height: 1.18;
}

.hero-summary {
    max-width: 630px;
    margin: 30px 0 0;
    color: var(--ink-soft);
    font-size: clamp(17px, 1.8vw, 20px);
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-top: 42px;
}

.primary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 28px;
    border: 1px solid var(--brand-blue);
    border-radius: 12px;
    color: #ffffff;
    background: var(--brand-blue);
    box-shadow: 0 12px 28px rgba(31, 79, 157, 0.2);
    font-size: 15px;
    font-weight: 700;
    transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.primary-link:hover {
    background: var(--brand-blue-deep);
    box-shadow: 0 16px 34px rgba(21, 56, 111, 0.25);
    transform: translateY(-2px);
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--brand-blue-deep);
    font-size: 15px;
    font-weight: 700;
}

.text-link span {
    font-size: 19px;
    transition: transform 180ms ease;
}

.text-link:hover span {
    transform: translateX(5px);
}

.hero-visual {
    position: relative;
}

.brand-stage {
    position: relative;
    display: grid;
    place-items: center;
    width: min(100%, 485px);
    aspect-ratio: 0.92;
    margin-left: auto;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: 46% 46% 36px 36px;
    background:
        radial-gradient(circle at 36% 28%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.22) 34%, transparent 58%),
        linear-gradient(145deg, rgba(223, 234, 250, 0.9), rgba(76, 127, 212, 0.24));
    box-shadow: var(--shadow-soft), inset 0 1px 0 #ffffff;
}

.brand-stage::before {
    position: absolute;
    inset: 10% 12% 22%;
    border: 1px solid rgba(31, 79, 157, 0.14);
    border-radius: 50%;
    content: "";
}

.brand-stage::after {
    position: absolute;
    right: -16%;
    bottom: -17%;
    width: 70%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: rgba(31, 79, 157, 0.08);
    content: "";
}

.hero-mark {
    position: relative;
    z-index: 2;
    width: 67%;
    height: auto;
    filter: drop-shadow(0 24px 24px rgba(23, 55, 108, 0.18));
    transform: translateY(-7%);
}

.stage-line {
    position: absolute;
    z-index: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(31, 79, 157, 0.26), transparent);
    transform: rotate(-18deg);
}

.stage-line-top {
    top: 30%;
    left: -15%;
    width: 115%;
}

.stage-line-bottom {
    right: -22%;
    bottom: 32%;
    width: 110%;
}

.stage-message {
    position: absolute;
    right: 34px;
    bottom: 28px;
    z-index: 3;
    display: flex;
    align-items: baseline;
    gap: 13px;
    color: var(--brand-blue-deep);
}

.stage-message strong {
    font-size: 20px;
    letter-spacing: 0.08em;
}

.stage-message span {
    color: #6680aa;
    font-size: 13px;
    letter-spacing: 0.12em;
}

.about-section,
.services-section,
.values-section {
    padding-block: clamp(90px, 11vw, 150px);
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(56px, 9vw, 130px);
}

.about-heading h2,
.section-intro h2,
.values-heading h2 {
    margin: 0;
    color: #17233b;
    font-size: clamp(34px, 4.2vw, 54px);
    font-weight: 680;
    letter-spacing: -0.035em;
    line-height: 1.28;
}

.about-copy {
    padding-top: 46px;
    color: var(--ink-soft);
}

.about-copy p {
    max-width: 680px;
    margin: 0 0 24px;
}

.about-copy .lead-copy {
    color: #2b374d;
    font-size: clamp(19px, 2vw, 24px);
    line-height: 1.8;
}

.about-copy blockquote {
    margin: 42px 0 0;
    padding: 4px 0 4px 25px;
    border-left: 3px solid var(--brand-blue-bright);
    color: var(--brand-blue-deep);
    font-size: 17px;
    font-weight: 700;
}

.services-section {
    background: var(--surface-soft);
}

.section-intro {
    display: grid;
    grid-template-columns: 0.45fr minmax(0, 1fr);
    align-items: end;
    margin-bottom: 68px;
    gap: 48px;
}

.section-intro .section-kicker {
    align-self: start;
}

.section-intro h2 {
    max-width: 790px;
}

.service-panel {
    position: relative;
    display: grid;
    grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
    gap: clamp(48px, 8vw, 110px);
    padding: clamp(46px, 6vw, 78px);
    border: 1px solid rgba(220, 229, 242, 0.9);
    border-radius: var(--radius-large);
    background: var(--surface);
    box-shadow: 0 20px 60px rgba(30, 67, 125, 0.08);
}

.service-panel + .service-panel {
    margin-top: 28px;
}

.service-network {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    background:
        linear-gradient(105deg, rgba(255, 255, 255, 0.94), rgba(234, 241, 251, 0.86)),
        var(--surface);
}

.service-network .service-title {
    grid-column: 2;
}

.service-network .service-body {
    grid-column: 1;
    grid-row: 1;
}

.service-label {
    display: block;
    margin-bottom: 18px;
    color: var(--brand-blue);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.service-title h3 {
    margin: 0;
    color: #18243d;
    font-size: clamp(28px, 3.2vw, 42px);
    font-weight: 680;
    letter-spacing: -0.03em;
    line-height: 1.35;
}

.service-body p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 1.9;
}

.service-points {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 26px;
    margin: 34px 0 0;
    padding: 26px 0 0;
    border-top: 1px solid var(--line);
    list-style: none;
}

.service-points li {
    position: relative;
    padding-left: 16px;
    color: #36445d;
    font-size: 14px;
    font-weight: 700;
}

.service-points li::before {
    position: absolute;
    top: 0.78em;
    left: 0;
    width: 6px;
    height: 2px;
    background: var(--brand-blue-bright);
    content: "";
}

.values-section {
    background: #ffffff;
}

.values-heading {
    max-width: 680px;
    margin-bottom: 68px;
}

.values-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--line);
}

.value-item {
    min-height: 230px;
    padding: 34px 30px 20px 0;
}

.value-item + .value-item {
    padding-left: 30px;
    border-left: 1px solid var(--line);
}

.value-item h3 {
    margin: 0 0 20px;
    color: var(--brand-blue-deep);
    font-size: 23px;
    font-weight: 700;
}

.value-item p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 15px;
}

.site-footer {
    padding-block: 46px;
    border-top: 1px solid var(--line);
    background: var(--surface-soft);
}

.footer-inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 36px;
}

.footer-brand img {
    width: 230px;
    height: auto;
}

.footer-brand p {
    margin: 16px 0 0;
    color: #657188;
    font-size: 13px;
}

.icp-link {
    color: #637087;
    font-size: 13px;
    transition: color 180ms ease;
}

.icp-link:hover {
    color: var(--brand-blue);
}

.reveal {
    opacity: 1;
    transform: none;
}

.motion-ready .reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 650ms ease, transform 650ms cubic-bezier(0.22, 1, 0.36, 1);
}

.motion-ready .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {
    .hero {
        min-height: auto;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 56px;
        padding-block: 78px 90px;
    }

    .hero-copy {
        max-width: 720px;
    }

    .hero-visual {
        width: min(100%, 560px);
        margin-inline: auto;
    }

    .brand-stage {
        margin-inline: auto;
    }

    .about-grid,
    .section-intro {
        grid-template-columns: 1fr;
        gap: 26px;
    }

    .about-copy {
        max-width: 720px;
        padding-top: 0;
    }

    .service-panel,
    .service-network {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .service-network .service-title,
    .service-network .service-body {
        grid-column: auto;
        grid-row: auto;
    }

    .values-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .value-item:nth-child(3) {
        border-left: 0;
        border-top: 1px solid var(--line);
        padding-left: 0;
    }

    .value-item:nth-child(4) {
        border-top: 1px solid var(--line);
    }
}

@media (max-width: 640px) {
    html {
        scroll-padding-top: 112px;
    }

    .page-shell,
    .header-inner {
        width: min(calc(100% - 32px), var(--page-width));
    }

    .header-inner {
        flex-wrap: wrap;
        min-height: auto;
        padding-block: 12px 10px;
        gap: 4px 14px;
    }

    .brand {
        flex-basis: 100%;
    }

    .brand img {
        width: 205px;
    }

    .site-nav {
        width: 100%;
        justify-content: space-between;
        gap: 12px;
        font-size: 13px;
    }

    .site-nav a {
        padding: 6px 0;
    }

    .site-nav a::after {
        bottom: 1px;
    }

    .hero-grid {
        gap: 48px;
        padding-block: 58px 72px;
    }

    .section-kicker {
        margin-bottom: 14px;
        font-size: 12px;
    }

    .hero h1 {
        font-size: clamp(34px, 9.6vw, 40px);
        line-height: 1.23;
    }

    .hero-summary {
        margin-top: 24px;
        font-size: 16px;
        line-height: 1.8;
    }

    .hero-actions {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
        margin-top: 32px;
    }

    .primary-link {
        min-height: 50px;
        width: 100%;
    }

    .brand-stage {
        width: 100%;
        border-radius: 40% 40% 26px 26px;
    }

    .stage-message {
        right: 24px;
        bottom: 20px;
    }

    .stage-message strong {
        font-size: 17px;
    }

    .stage-message span {
        font-size: 11px;
    }

    .about-section,
    .services-section,
    .values-section {
        padding-block: 76px;
    }

    .about-heading h2,
    .section-intro h2,
    .values-heading h2 {
        font-size: 34px;
    }

    .about-copy .lead-copy {
        font-size: 18px;
    }

    .about-copy blockquote {
        margin-top: 32px;
        padding-left: 18px;
        font-size: 15px;
    }

    .section-intro,
    .values-heading {
        margin-bottom: 42px;
    }

    .service-panel {
        padding: 32px 24px;
        border-radius: 22px;
    }

    .service-title h3 {
        font-size: 28px;
    }

    .service-body p {
        font-size: 15px;
    }

    .service-points {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .values-list {
        grid-template-columns: 1fr;
    }

    .value-item,
    .value-item + .value-item,
    .value-item:nth-child(3),
    .value-item:nth-child(4) {
        min-height: 0;
        padding: 28px 0;
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .values-list .value-item:first-child {
        border-top: 0;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 28px;
    }

    .footer-brand img {
        width: 210px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .motion-ready .reveal {
        opacity: 1;
        transform: none;
    }
}