:root {
    --bg: #f4efe6;
    --bg-soft: #efe7dc;
    --surface: rgba(255, 252, 247, 0.88);
    --surface-strong: #fffaf3;
    --surface-dark: #171614;
    --text: #181511;
    --text-muted: #645a4c;
    --line: rgba(24, 21, 17, 0.1);
    --line-strong: rgba(24, 21, 17, 0.2);
    --teal: #8dd6c4;
    --teal-strong: #0f766e;
    --amber: #d78e35;
    --red: #ce5a49;
    --shadow: 0 24px 90px rgba(34, 26, 15, 0.12);
    --shadow-strong: 0 38px 90px rgba(34, 26, 15, 0.22);
    --radius-card: 30px;
    --radius-pill: 999px;
    --space-section: 112px;
    --space-group: 64px;
    --space-element: 24px;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("./assets/fonts/IBMPlexSans-Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("./assets/fonts/IBMPlexSans-SemiBold.ttf") format("truetype");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("./assets/fonts/IBMPlexMono-Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Bricolage Grotesque";
    src: url("./assets/fonts/BricolageGrotesque-Bold.ttf") format("truetype");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html[data-lang="en"] .lang-zh {
    display: none !important;
}

html[data-lang="zh"] .lang-en {
    display: none !important;
}

body {
    margin: 0;
    font-family: "IBM Plex Sans", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(141, 214, 196, 0.38), transparent 28%),
        radial-gradient(circle at top right, rgba(215, 142, 53, 0.16), transparent 22%),
        linear-gradient(180deg, #f7f3eb 0%, #f0e9dc 100%);
    min-width: 320px;
}

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

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

button {
    font: inherit;
}

.site-shell {
    width: min(1320px, calc(100% - 40px));
    margin: 0 auto;
    padding-bottom: 40px;
}

.lang-block,
.lang-copy {
    display: block;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    object-fit: cover;
    box-shadow:
        0 0 0 6px rgba(141, 214, 196, 0.12),
        0 10px 26px rgba(24, 21, 17, 0.18);
}

.brand-wordmark {
    font-family: "Bricolage Grotesque", sans-serif;
    font-size: 30px;
    line-height: 1;
    letter-spacing: -0.04em;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topnav {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 10px 14px;
    background: rgba(255, 250, 243, 0.75);
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    backdrop-filter: blur(14px);
}

.topnav a {
    font-size: 14px;
    color: var(--text-muted);
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px;
    background: rgba(255, 250, 243, 0.75);
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    backdrop-filter: blur(14px);
}

.lang-button {
    min-width: 56px;
    min-height: 36px;
    padding: 0 12px;
    border: 0;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.lang-button:hover,
.lang-button:focus-visible {
    transform: translateY(-1px);
}

.lang-button.is-active {
    background: var(--text);
    color: #fff7ef;
}

.section {
    padding: var(--space-section) 0;
}

.section-tight {
    padding: 28px 0 0;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
    align-items: center;
    gap: 56px;
    min-height: calc(100vh - 110px);
    padding-top: 42px;
}

.eyebrow {
    margin: 0 0 16px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--teal-strong);
}

.hero h1,
.section-heading h2,
.final-cta h2 {
    margin: 0;
    font-family: "Bricolage Grotesque", sans-serif;
    font-size: clamp(44px, 7vw, 84px);
    line-height: 0.96;
    letter-spacing: -0.04em;
    max-width: 10.8ch;
}

.install-title {
    margin: 0;
    font-family: "Bricolage Grotesque", sans-serif;
    font-size: clamp(38px, 5.8vw, 68px);
    line-height: 0.98;
    letter-spacing: -0.04em;
    max-width: 11ch;
}

.section-heading h2,
.final-cta h2 {
    font-size: clamp(34px, 4.8vw, 58px);
    max-width: 13ch;
}

.hero-lead,
.section-heading p:not(.eyebrow),
.feature-card p,
.step-card p,
.install-card p,
.footer p {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-muted);
}

.hero-lead {
    max-width: 34rem;
    margin: 28px 0 0;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 36px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 22px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--text);
    color: #fff7ef;
    box-shadow: 0 14px 30px rgba(24, 21, 17, 0.18);
}

.button-primary:hover,
.button-primary:focus-visible {
    box-shadow: 0 18px 36px rgba(24, 21, 17, 0.22);
}

.button-secondary {
    background: rgba(255, 252, 247, 0.75);
    border-color: var(--line-strong);
    color: var(--text);
}

.hero-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 28px 0 0;
}

.hero-facts li,
.status-pill,
.phone-chip {
    padding: 8px 12px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(24, 21, 17, 0.08);
    background: rgba(255, 252, 247, 0.65);
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
}

.hero-stage {
    position: relative;
    min-height: 720px;
    padding: 48px 12px 24px 12px;
}

.orb {
    position: absolute;
    filter: blur(16px);
    border-radius: 50%;
    opacity: 0.72;
}

.orb-left {
    width: 260px;
    height: 260px;
    left: 22px;
    top: 70px;
    background: rgba(141, 214, 196, 0.55);
}

.orb-right {
    width: 210px;
    height: 210px;
    right: 36px;
    bottom: 70px;
    background: rgba(215, 142, 53, 0.3);
}

.device {
    position: relative;
    border: 1px solid rgba(24, 21, 17, 0.1);
    border-radius: 34px;
    background: rgba(255, 252, 247, 0.72);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.device-desktop {
    width: min(100%, 720px);
    min-height: 540px;
    overflow: hidden;
    animation: floatDesktop 7s ease-in-out infinite;
}

.device-header {
    display: flex;
    gap: 8px;
    padding: 18px 18px 0;
}

.device-header span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(24, 21, 17, 0.16);
}

.device-content {
    padding: 18px;
}

.panel-label-row,
.mini-inline,
.phone-actions,
.feed-row,
.proof-item,
.footer {
    display: flex;
    align-items: center;
}

.panel-label-row {
    justify-content: space-between;
    gap: 16px;
}

.panel-label,
.mini-label,
.phone-kicker,
.card-kicker,
.step-index {
    margin: 0;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.status-pill {
    background: rgba(141, 214, 196, 0.36);
    border-color: rgba(15, 118, 110, 0.18);
    color: var(--teal-strong);
}

.terminal {
    margin-top: 16px;
    padding: 22px;
    border-radius: 24px;
    background: var(--surface-dark);
    color: #faf7f1;
    font-family: "IBM Plex Mono", monospace;
    min-height: 260px;
}

.terminal-line {
    font-size: 14px;
    line-height: 1.85;
}

.terminal-line.dim {
    color: #97c5bb;
}

.desktop-footer {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.mini-card {
    padding: 18px;
    border-radius: 22px;
    border: 1px solid var(--line);
    background: var(--surface-strong);
}

.tool-icons {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.tool-icons img,
.mini-inline img {
    width: 28px;
    height: 28px;
}

.mini-inline {
    gap: 12px;
    margin-top: 12px;
    color: var(--text);
}

.device-phone {
    position: absolute;
    right: -4px;
    bottom: 10px;
    width: min(46vw, 310px);
    background: linear-gradient(180deg, rgba(24, 21, 17, 0.95), rgba(38, 31, 23, 0.95));
    color: #fff9f0;
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow-strong);
    animation: floatPhone 8s ease-in-out infinite;
}

.phone-notch {
    width: 42%;
    height: 28px;
    margin: 10px auto 0;
    border-radius: 0 0 18px 18px;
    background: rgba(255, 255, 255, 0.06);
}

.phone-content {
    padding: 22px 22px 28px;
}

.phone-kicker {
    color: rgba(255, 249, 240, 0.66);
}

.device-phone h2 {
    margin: 12px 0 0;
    font-size: 32px;
    line-height: 1.02;
    letter-spacing: -0.04em;
    max-width: 7.8ch;
}

.phone-card {
    margin-top: 20px;
    padding: 18px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.phone-card p {
    margin: 12px 0 0;
    font-size: 18px;
    line-height: 1.5;
    color: #fff9f0;
}

.phone-card-strong {
    background: linear-gradient(180deg, rgba(141, 214, 196, 0.24), rgba(141, 214, 196, 0.06));
}

.phone-chip {
    display: inline-flex;
    background: rgba(255, 249, 240, 0.12);
    border-color: rgba(255, 249, 240, 0.1);
    color: #fff9f0;
}

.phone-actions {
    gap: 12px;
    margin-top: 18px;
}

.phone-actions span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 96px;
    min-height: 42px;
    padding: 0 16px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 600;
}

.approve {
    background: #9ae1d1;
    color: #0c2f2b;
}

.deny {
    background: rgba(255, 255, 255, 0.1);
    color: #fff9f0;
}

.phone-feed {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.feed-row {
    gap: 12px;
    align-items: flex-start;
}

.feed-row + .feed-row {
    margin-top: 14px;
}

.feed-row p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 249, 240, 0.76);
}

.feed-dot {
    width: 10px;
    height: 10px;
    margin-top: 8px;
    border-radius: 50%;
    background: #9ae1d1;
    box-shadow: 0 0 0 5px rgba(154, 225, 209, 0.12);
}

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

.proof-item,
.step-card,
.feature-card,
.install-card,
.final-cta {
    border: 1px solid var(--line);
    background: rgba(255, 252, 247, 0.74);
    border-radius: var(--radius-card);
    backdrop-filter: blur(14px);
}

.proof-item {
    align-items: flex-start;
    gap: 16px;
    padding: 22px;
}

.proof-number {
    flex: 0 0 auto;
    font-family: "Bricolage Grotesque", sans-serif;
    font-size: 24px;
    line-height: 1;
}

.proof-item p {
    margin: 0;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
}

.section-heading {
    display: grid;
    gap: 20px;
    margin-bottom: 34px;
}

.steps-grid,
.cards-grid,
.install-layout {
    display: grid;
    gap: 18px;
}

.steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.step-card,
.feature-card,
.install-card {
    padding: 28px;
}

.step-card h3,
.feature-card h3,
.install-card h3 {
    margin: 16px 0 0;
    font-size: 30px;
    line-height: 1.06;
    letter-spacing: -0.03em;
}

.step-card p:last-child,
.feature-card p:last-child,
.install-card p:last-child {
    margin: 18px 0 0;
}

.cards-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
}

.feature-card-large {
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 100%;
    background:
        radial-gradient(circle at top left, rgba(141, 214, 196, 0.22), transparent 40%),
        linear-gradient(180deg, rgba(255, 252, 247, 0.96), rgba(248, 241, 228, 0.84));
}

.install-layout {
    grid-template-columns: 1.25fr 1fr 1fr;
}

.install-card-command {
    background: linear-gradient(180deg, rgba(24, 21, 17, 0.96), rgba(39, 32, 24, 0.96));
    color: #fff9f0;
    border-color: rgba(255, 255, 255, 0.06);
}

.install-card-command .card-kicker,
.install-card-command .install-note,
.install-card-command p,
.install-card-command h3 {
    color: inherit;
}

.command-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 22px;
    padding: 18px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.command-stack {
    display: grid;
    gap: 12px;
    margin-top: 22px;
}

.command-box-compact {
    margin-top: 0;
}

.command-box code,
.install-note code {
    font-family: "IBM Plex Mono", monospace;
    font-size: 16px;
}

.copy-button {
    flex: 0 0 auto;
    min-width: 82px;
    min-height: 42px;
    padding: 0 16px;
    border: 0;
    border-radius: var(--radius-pill);
    background: #9ae1d1;
    color: #0c2f2b;
    cursor: pointer;
    transition: transform 160ms ease, opacity 160ms ease;
}

.copy-button:hover,
.copy-button:focus-visible {
    transform: translateY(-1px);
}

.install-note {
    margin-top: 18px;
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 249, 240, 0.8);
}

.text-link {
    display: inline-flex;
    margin-top: 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--teal-strong);
}

.final-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 34px;
    background:
        radial-gradient(circle at 20% 10%, rgba(141, 214, 196, 0.2), transparent 30%),
        rgba(255, 252, 247, 0.82);
}

.final-cta-copy .eyebrow {
    margin-bottom: 12px;
}

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

.install-page-hero {
    padding-top: 44px;
    padding-bottom: 48px;
}

.page-lead {
    margin: 0;
    max-width: 42rem;
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-muted);
}

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--line);
    background: rgba(255, 252, 247, 0.74);
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.install-guide-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 18px;
    padding-top: 24px;
}

.install-guide-card {
    padding: 28px;
    border: 1px solid var(--line);
    background: rgba(255, 252, 247, 0.78);
    border-radius: var(--radius-card);
    backdrop-filter: blur(14px);
}

.install-guide-card h2 {
    margin: 14px 0 0;
    font-size: 30px;
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.install-guide-card p {
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-muted);
}

.install-guide-card-wide {
    grid-column: span 2;
}

.install-guide-card-strong {
    background: linear-gradient(180deg, rgba(24, 21, 17, 0.96), rgba(39, 32, 24, 0.96));
    border-color: rgba(255, 255, 255, 0.06);
}

.install-guide-card-strong h2,
.install-guide-card-strong p,
.install-guide-card-strong .card-kicker,
.install-guide-card-strong .install-note,
.install-guide-card-strong .mono-note {
    color: #fff9f0;
}

.mono-note {
    margin-top: 18px;
    font-size: 14px;
    color: var(--text-muted);
}

.footer {
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 28px 0 8px;
}

.footer p {
    margin: 0;
    font-size: 14px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
}

@keyframes floatDesktop {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-8px);
    }
}

@keyframes floatPhone {
    0%, 100% {
        transform: translate3d(0, 0, 0);
    }
    50% {
        transform: translate3d(0, 10px, 0);
    }
}

@media (max-width: 1180px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .hero h1,
    .section-heading h2,
    .final-cta h2 {
        max-width: none;
    }

    .hero-stage {
        min-height: 660px;
    }

    .steps-grid,
    .cards-grid,
    .install-layout {
        grid-template-columns: 1fr 1fr;
    }

    .feature-card-large {
        grid-row: auto;
        grid-column: span 2;
    }

    .install-card-command {
        grid-column: span 2;
    }

    .final-cta {
        flex-direction: column;
        align-items: flex-start;
    }

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

@media (max-width: 820px) {
    :root {
        --space-section: 72px;
    }

    .site-shell {
        width: min(100% - 24px, 1320px);
    }

    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .topbar-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .topnav {
        width: 100%;
        justify-content: space-between;
        gap: 12px;
        overflow-x: auto;
    }

    .lang-switch {
        align-self: flex-start;
    }

    .proof-strip,
    .steps-grid,
    .cards-grid,
    .install-layout,
    .install-guide-grid {
        grid-template-columns: 1fr;
    }

    .feature-card-large,
    .install-card-command,
    .install-guide-card-wide {
        grid-column: auto;
    }

    .hero-lead,
    .hero-facts,
    .cta-row {
        max-width: none;
    }

    .hero-stage {
        min-height: 720px;
        padding-left: 0;
        padding-right: 0;
    }

    .device-desktop {
        width: 100%;
    }

    .device-phone {
        right: 8px;
        width: min(58vw, 280px);
    }

    .desktop-footer {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .hero {
        gap: 32px;
    }

    .hero h1 {
        font-size: clamp(42px, 18vw, 68px);
    }

    .section-heading h2,
    .final-cta h2 {
        font-size: clamp(30px, 11vw, 42px);
    }

    .hero-lead,
    .section-heading p:not(.eyebrow),
    .feature-card p,
    .step-card p,
    .install-card p,
    .install-guide-card p,
    .page-lead {
        font-size: 16px;
    }

    .hero-stage {
        min-height: 620px;
    }

    .device-desktop {
        min-height: 430px;
    }

    .terminal {
        min-height: 190px;
        padding: 18px;
    }

    .terminal-line {
        font-size: 12px;
    }

    .device-phone {
        position: absolute;
        width: min(68vw, 250px);
        right: 0;
        bottom: -8px;
    }

    .step-card h3,
    .feature-card h3,
    .install-card h3 {
        font-size: 26px;
    }

    .command-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .copy-button {
        width: 100%;
    }

    .footer {
        align-items: flex-start;
    }
}

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

    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }
}