:root {
    --bg: #fbfaf7;
    --bg-soft: #f1eee7;
    --ink: #171915;
    --ink-muted: #656b61;
    --line: rgba(23, 25, 21, 0.12);
    --surface: rgba(255, 255, 252, 0.78);
    --surface-strong: #ffffff;
    --jade: #0f766e;
    --jade-dark: #0a4f49;
    --sand: #d9c7a5;
    --mist: #dce9e5;
    --shadow: 0 24px 70px rgba(21, 30, 25, 0.12);
    --radius-lg: 34px;
    --radius-md: 22px;
    --radius-sm: 14px;
    --container: min(1160px, calc(100vw - 40px));
    --font-display: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, serif;
    --font-body: "MiSans", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--font-body);
    background:
        radial-gradient(circle at 14% 8%, rgba(15, 118, 110, 0.11), transparent 28vw),
        radial-gradient(circle at 86% 18%, rgba(217, 199, 165, 0.35), transparent 24vw),
        linear-gradient(180deg, #fbfaf7 0%, #f7f4ed 52%, #fbfaf7 100%);
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    content: "";
    opacity: 0.36;
    background-image:
        linear-gradient(rgba(23, 25, 21, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23, 25, 21, 0.035) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, black, transparent 85%);
}

a {
    color: inherit;
}

img {
    max-width: 100%;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 30;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--jade), var(--sand));
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: var(--container);
    margin: 16px auto 0;
    padding: 14px 16px;
    border: 1px solid rgba(23, 25, 21, 0.09);
    border-radius: 999px;
    background: rgba(251, 250, 247, 0.76);
    backdrop-filter: blur(18px);
    box-shadow: 0 10px 30px rgba(18, 24, 21, 0.07);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    overflow: hidden;
    color: transparent;
    font-size: 0;
    background: url("assets/brand/muioi-avatar-1024.png") center / cover no-repeat;
    border: 0;
    border-radius: 14px;
    box-shadow: 0 12px 24px rgba(15, 118, 110, 0.16);
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 15px;
    letter-spacing: 0.04em;
}

.brand small {
    margin-top: 2px;
    color: var(--ink-muted);
    font-size: 11px;
    letter-spacing: 0.08em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--ink-muted);
    font-size: 14px;
    text-decoration: none;
    transition: color 180ms ease, background 180ms ease;
}

.site-nav a:hover {
    color: var(--ink);
    background: rgba(15, 118, 110, 0.08);
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: var(--ink);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 5px auto;
    background: #ffffff;
    transition: transform 180ms ease;
}

.section-shell {
    width: var(--container);
    margin: 0 auto;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
    gap: 48px;
    align-items: center;
    min-height: calc(100vh - 92px);
    padding: 80px 0 72px;
}

.hero h1 {
    max-width: 760px;
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(44px, 7vw, 92px);
    font-weight: 700;
    line-height: 0.98;
    letter-spacing: -0.08em;
}

.hero-copy p {
    max-width: 640px;
    margin: 26px 0 0;
    color: var(--ink-muted);
    font-size: 18px;
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 650;
    text-decoration: none;
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button.primary {
    color: #ffffff;
    background: var(--ink);
    box-shadow: 0 16px 30px rgba(23, 25, 21, 0.18);
}

.button.secondary {
    color: var(--jade-dark);
    border-color: rgba(15, 118, 110, 0.2);
    background: rgba(255, 255, 255, 0.58);
}

.hero-panel {
    position: relative;
    min-height: 560px;
    overflow: hidden;
    padding: 28px;
    border: 1px solid rgba(23, 25, 21, 0.1);
    border-radius: var(--radius-lg);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(241, 238, 231, 0.68)),
        radial-gradient(circle at 70% 20%, rgba(15, 118, 110, 0.22), transparent 28%);
    box-shadow: var(--shadow);
}

.panel-topline,
.metric-row {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    color: var(--ink-muted);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.signal-orbit {
    position: absolute;
    inset: 80px 34px 130px;
    border: 1px solid rgba(15, 118, 110, 0.16);
    border-radius: 50%;
}

.signal-orbit::before,
.signal-orbit::after {
    position: absolute;
    inset: 12%;
    content: "";
    border: 1px solid rgba(15, 118, 110, 0.13);
    border-radius: inherit;
}

.signal-orbit::after {
    inset: 25%;
    border-color: rgba(217, 199, 165, 0.58);
}

.signal-orbit span {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--jade);
    box-shadow: 0 0 0 12px rgba(15, 118, 110, 0.09);
    animation: float 5s ease-in-out infinite;
}

.signal-orbit span:nth-child(1) {
    top: 12%;
    left: 20%;
}

.signal-orbit span:nth-child(2) {
    right: 18%;
    bottom: 18%;
    animation-delay: 600ms;
}

.signal-orbit span:nth-child(3) {
    top: 46%;
    right: 38%;
    width: 8px;
    height: 8px;
    background: var(--sand);
    animation-delay: 1100ms;
}

.hero-card {
    position: absolute;
    z-index: 3;
    border: 1px solid rgba(23, 25, 21, 0.1);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px);
    box-shadow: 0 18px 48px rgba(23, 25, 21, 0.1);
}

.hero-card strong,
.hero-card p,
.hero-card a {
    display: block;
}

.hero-card strong {
    color: var(--jade-dark);
    font-size: 13px;
    letter-spacing: 0.1em;
}

.hero-card p {
    margin: 12px 0 0;
    font-family: var(--font-display);
    font-size: 26px;
    line-height: 1.25;
    letter-spacing: -0.03em;
}

.hero-card a {
    margin-top: 18px;
    color: var(--jade-dark);
    font-weight: 700;
    text-decoration: none;
}

.main-card {
    right: 34px;
    bottom: 108px;
    width: min(330px, calc(100% - 68px));
    padding: 26px;
}

.side-card {
    top: 118px;
    left: 30px;
    width: 210px;
    padding: 22px;
}

.side-card p {
    font-size: 20px;
}

.metric-row {
    position: absolute;
    right: 28px;
    bottom: 30px;
    left: 28px;
    gap: 10px;
    padding-top: 18px;
    border-top: 1px solid rgba(23, 25, 21, 0.1);
    text-transform: none;
}

.metric-row strong {
    color: var(--ink);
    font-family: var(--font-display);
    font-size: 22px;
}

.intro-grid,
.document-section,
.company-section {
    padding: 90px 0;
}

.section-heading {
    display: grid;
    grid-template-columns: 72px minmax(0, 0.82fr);
    gap: 22px;
    align-items: start;
    margin-bottom: 42px;
}

.section-number {
    display: inline-flex;
    width: 52px;
    height: 52px;
    align-items: center;
    justify-content: center;
    color: var(--jade-dark);
    border: 1px solid rgba(15, 118, 110, 0.2);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.48);
    font-family: var(--font-display);
}

.section-heading h2,
.company-card h2 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(34px, 4vw, 58px);
    line-height: 1.06;
    letter-spacing: -0.05em;
}

.section-heading p {
    grid-column: 2;
    max-width: 760px;
    margin: -24px 0 0;
    color: var(--ink-muted);
    font-size: 17px;
    line-height: 1.8;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.topic-card {
    min-height: 330px;
    padding: 26px;
    border: 1px solid rgba(23, 25, 21, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.62);
    transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.topic-card:hover {
    transform: translateY(-6px);
    border-color: rgba(15, 118, 110, 0.22);
    box-shadow: 0 22px 54px rgba(23, 25, 21, 0.1);
}

.topic-index {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    border-radius: 12px;
    background: var(--ink);
    font-family: var(--font-display);
}

.topic-card h3 {
    margin: 78px 0 0;
    font-family: var(--font-display);
    font-size: 25px;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.topic-card p {
    margin: 16px 0 0;
    color: var(--ink-muted);
    line-height: 1.75;
}

.topic-card a {
    display: inline-flex;
    margin-top: 22px;
    color: var(--jade-dark);
    font-weight: 700;
    text-decoration: none;
}

.service-band {
    margin: 40px 0;
    padding: 84px 0;
    color: #f8faf6;
    background:
        linear-gradient(135deg, rgba(13, 29, 25, 0.97), rgba(13, 56, 50, 0.95)),
        radial-gradient(circle at 82% 18%, rgba(217, 199, 165, 0.22), transparent 28%);
}

.service-layout {
    display: grid;
    grid-template-columns: 0.82fr 1fr;
    gap: 48px;
    align-items: start;
}

.service-band .section-number {
    color: #dce9e5;
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
}

.service-band .section-heading p {
    color: rgba(248, 250, 246, 0.72);
}

.service-list {
    display: grid;
    gap: 18px;
}

.service-item {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 20px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
}

.service-item span {
    color: var(--sand);
    font-family: var(--font-display);
    font-size: 28px;
}

.service-item h3 {
    margin: 0;
    font-size: 22px;
}

.service-item p {
    margin: 10px 0 0;
    color: rgba(248, 250, 246, 0.72);
    line-height: 1.75;
}

.document-list {
    display: grid;
    border-top: 1px solid var(--line);
}

.document-row {
    display: grid;
    grid-template-columns: 130px 1fr 140px;
    gap: 24px;
    align-items: center;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
}

.document-row strong {
    font-family: var(--font-display);
    font-size: clamp(22px, 2.5vw, 34px);
    line-height: 1.22;
    letter-spacing: -0.04em;
}

.document-row > span:last-child {
    color: var(--ink-muted);
    text-align: right;
}

.doc-type {
    color: var(--jade-dark);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.company-card {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 42px;
    padding: 42px;
    border: 1px solid rgba(23, 25, 21, 0.1);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.64);
    box-shadow: var(--shadow);
}

.company-card p {
    margin: 0;
    color: var(--ink-muted);
    font-size: 18px;
    line-height: 1.9;
}

.company-facts {
    grid-column: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.company-facts span {
    padding: 9px 13px;
    border: 1px solid rgba(15, 118, 110, 0.16);
    border-radius: 999px;
    color: var(--jade-dark);
    background: rgba(15, 118, 110, 0.06);
    font-size: 13px;
    font-weight: 700;
}

.site-footer {
    padding: 24px 16px 28px;
    border-top: 1px solid var(--line);
    color: #555;
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.site-footer p {
    margin: 0;
}

.site-footer a {
    color: inherit;
    text-decoration: none;
}

.site-footer a:hover {
    color: #1677ff;
}

.beian-info {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin-top: 4px;
}

.gongan-box {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.gongan-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    object-fit: contain;
    vertical-align: middle;
}

.doc-page {
    background:
        radial-gradient(circle at 80% 0%, rgba(15, 118, 110, 0.1), transparent 28vw),
        linear-gradient(180deg, #fbfaf7 0%, #f7f4ed 100%);
}

.doc-main {
    width: min(920px, calc(100vw - 40px));
    margin: 0 auto;
    padding: 78px 0 96px;
}

.doc-hero {
    padding-bottom: 42px;
    border-bottom: 1px solid var(--line);
}

.doc-back {
    display: inline-flex;
    margin-bottom: 26px;
    color: var(--jade-dark);
    font-weight: 800;
    text-decoration: none;
}

.doc-hero h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(38px, 6vw, 72px);
    line-height: 1.04;
    letter-spacing: -0.06em;
}

.doc-summary {
    max-width: 760px;
    margin: 22px 0 0;
    color: var(--ink-muted);
    font-size: 18px;
    line-height: 1.9;
}

.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.doc-meta span {
    padding: 8px 12px;
    border: 1px solid rgba(15, 118, 110, 0.16);
    border-radius: 999px;
    color: var(--jade-dark);
    background: rgba(15, 118, 110, 0.06);
    font-size: 13px;
    font-weight: 700;
}

.doc-content {
    display: grid;
    gap: 32px;
    padding-top: 46px;
}

.doc-section {
    padding: 28px;
    border: 1px solid rgba(23, 25, 21, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.62);
}

.doc-section h2 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 32px;
    letter-spacing: -0.04em;
}

.doc-section h3 {
    margin: 24px 0 8px;
    font-size: 20px;
}

.doc-section p,
.doc-section li {
    color: var(--ink-muted);
    font-size: 16px;
    line-height: 1.86;
}

.doc-section ul,
.doc-section ol {
    padding-left: 1.25em;
}

.callout {
    margin-top: 18px;
    padding: 18px;
    border-left: 4px solid var(--jade);
    border-radius: 16px;
    color: var(--ink-muted);
    background: rgba(15, 118, 110, 0.07);
}

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

.next-docs a {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.55);
    font-weight: 800;
    text-decoration: none;
}

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

.reveal {
    animation: rise-in 620ms ease both;
}

@keyframes float {
    0%,
    100% {
        transform: translate3d(0, 0, 0);
    }

    50% {
        transform: translate3d(0, -12px, 0);
    }
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(14px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 980px) {
    .hero,
    .service-layout,
    .company-card {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
        padding-top: 70px;
    }

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

    .company-facts {
        grid-column: auto;
    }

    .document-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .document-row > span:last-child {
        text-align: left;
    }
}

@media (max-width: 760px) {
    :root {
        --container: min(100vw - 28px, 1160px);
    }

    .site-header {
        align-items: flex-start;
        border-radius: 26px;
    }

    .site-nav {
        position: absolute;
        top: calc(100% + 10px);
        right: 0;
        left: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        border: 1px solid rgba(23, 25, 21, 0.09);
        border-radius: 24px;
        background: rgba(251, 250, 247, 0.96);
        box-shadow: 0 18px 44px rgba(23, 25, 21, 0.12);
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        padding: 12px 14px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-toggle[aria-expanded="true"] span:first-child {
        transform: translateY(3.5px) rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] span:last-child {
        transform: translateY(-3.5px) rotate(-45deg);
    }

    .hero {
        gap: 34px;
        padding-bottom: 46px;
    }

    .hero h1 {
        letter-spacing: -0.06em;
    }

    .hero-copy p,
    .company-card p,
    .doc-summary {
        font-size: 16px;
    }

    .hero-panel {
        min-height: 500px;
        padding: 22px;
    }

    .main-card {
        right: 22px;
        bottom: 104px;
        width: calc(100% - 44px);
    }

    .side-card {
        left: 22px;
        width: calc(100% - 44px);
    }

    .metric-row {
        right: 22px;
        left: 22px;
        flex-direction: column;
    }

    .section-heading {
        grid-template-columns: 1fr;
    }

    .section-heading p {
        grid-column: auto;
        margin-top: -20px;
    }

    .topic-grid,
    .next-docs {
        grid-template-columns: 1fr;
    }

    .topic-card {
        min-height: 260px;
    }

    .topic-card h3 {
        margin-top: 42px;
    }

    .service-band {
        padding: 64px 0;
    }

    .service-item {
        grid-template-columns: 1fr;
    }

    .company-card {
        padding: 28px;
    }

    .doc-main {
        padding-top: 54px;
    }
}

@media (max-width: 600px) {
    .site-footer {
        padding: 18px 12px;
        font-size: 12px;
    }

    .beian-info {
        flex-direction: column;
        gap: 2px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}