:root {
    --green: #f2a83b;
    --green-deep: #d97722;
    --green-dark: #9f4f1f;
    --text: #1a1c1c;
    --muted: #666;
    --line: #eadfd1;
    --bg: #fffaf4;
    --soft: #fff1dd;
    --white: #fff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    letter-spacing: 0;
}

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

.site-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 84px;
    background: rgba(249, 249, 249, .9);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

.site-brand {
    color: var(--green-deep);
    font-size: 26px;
    font-weight: 800;
}

.site-links {
    display: flex;
    align-items: stretch;
    height: 100%;
    gap: 38px;
}

.site-links a {
    display: flex;
    align-items: center;
    color: #555;
    font-size: 16px;
    font-weight: 600;
    border-bottom: 3px solid transparent;
}

.site-links a.active {
    color: var(--green-deep);
    border-bottom-color: var(--green-deep);
}

.home-hero {
    position: relative;
    min-height: 1050px;
    overflow: hidden;
    background: #fff;
}

.home-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: 180vw;
    height: 1010px;
    transform: translateX(-50%);
    background:
        linear-gradient(180deg, #ffb941 0%, #ffc65c 42%, #f1dbc4 72%, #fff4e8 100%);
    border-bottom-left-radius: 50% 35%;
    border-bottom-right-radius: 50% 35%;
}

.hero-inner {
    position: relative;
    z-index: 1;
    width: min(760px, calc(100% - 32px));
    margin: 0 auto;
    padding-top: 150px;
    color: #5f3518;
    text-align: center;
}

.hero-title {
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    font-size: 47px;
    line-height: 1.05;
    font-weight: 800;
}

.hero-app-icon {
    width: 1em;
    height: 1em;
    flex: 0 0 auto;
    border-radius: 22%;
    object-fit: contain;
}

.hero-brand {
    margin: 20px 0 54px;
    font-size: 26px;
    line-height: 1.08;
    font-weight: 800;
}

.hero-tagline {
    margin: 0;
    color: rgba(95, 53, 24, .74);
    font-size: 18px;
    line-height: 1.4;
    font-weight: 800;
}

.hero-updates {
    width: min(720px, 100%);
    margin: 76px auto 0;
    color: rgba(95, 53, 24, .74);
    font-size: 16px;
    font-weight: 700;
}

.hero-log-list {
    padding: 22px 16px 12px;
}

.hero-log-list a {
    display: grid;
    grid-template-columns: 1fr 70px;
    gap: 20px;
    padding: 9px 0;
    color: rgba(95, 53, 24, .88);
    text-align: left;
    font-size: 17px;
    font-weight: 800;
}

.hero-log-list time {
    color: rgba(95, 53, 24, .56);
    text-align: right;
}

.more-link {
    display: inline-block;
    color: #8f4d18;
    font-size: 15px;
    font-weight: 800;
}

.download-row {
    display: flex;
    justify-content: center;
    gap: 52px;
    margin-top: 82px;
    padding-top: 54px;
    border-top: 1px solid rgba(159, 79, 31, .18);
}

.download-entry {
    width: 112px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    color: rgba(95, 53, 24, .84);
    font-size: 13px;
    font-weight: 800;
}

.download-entry.disabled {
    cursor: default;
}

.download-icon,
.feature-icon {
    display: grid;
    place-items: center;
    color: var(--green-deep);
    background: rgba(255, 255, 255, .22);
    font-weight: 800;
}

.download-icon {
    width: 76px;
    height: 76px;
    border-radius: 18px;
    color: #8f4d18;
    font-size: 33px;
}

.feature-icon {
    border-radius: 999px;
}

.download-icon img,
.feature-icon img {
    display: block;
    width: 54%;
    height: 54%;
    object-fit: contain;
}

.features-section {
    background: #fff;
    padding: 82px 40px 118px;
}

.section-title {
    text-align: center;
}

.section-title h2 {
    margin: 0;
    font-size: 34px;
    line-height: 1.25;
    font-weight: 800;
}

.section-title span {
    display: block;
    width: 56px;
    height: 5px;
    margin: 24px auto 0;
    border-radius: 99px;
    background: var(--green-deep);
}

.feature-grid {
    width: min(1200px, 100%);
    margin: 118px auto 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 72px;
}

.feature-grid article {
    text-align: center;
}

.feature-icon {
    width: 78px;
    height: 78px;
    margin: 0 auto 42px;
    background: #fff1dd;
    font-size: 28px;
}

.feature-grid h3 {
    margin: 0 0 22px;
    font-size: 27px;
    line-height: 1.2;
    font-weight: 800;
}

.feature-grid p {
    width: min(310px, 100%);
    margin: 0 auto;
    color: #7a7a7a;
    font-size: 17px;
    line-height: 1.65;
    font-weight: 600;
}

.site-footer {
    background: #fff;
    border-top: 1px solid var(--line);
    padding: 74px 80px 44px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 80px;
    width: min(1360px, 100%);
    margin: 0 auto 58px;
}

.footer-grid strong {
    display: block;
    margin-bottom: 26px;
    font-size: 16px;
    font-weight: 800;
}

.footer-grid p,
.footer-grid a {
    display: block;
    max-width: 290px;
    margin: 0 0 15px;
    color: #737373;
    font-size: 17px;
    line-height: 1.65;
    font-weight: 500;
}

.footer-grid a.active {
    color: var(--green-deep);
    font-weight: 800;
}

.footer-bottom {
    width: min(1360px, 100%);
    margin: 0 auto;
    padding-top: 38px;
    border-top: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
    color: #7b7b7b;
    font-size: 16px;
    line-height: 1.35;
}

.footer-icp {
    font-weight: 400;
}

.footer-copyright {
    font-weight: 700;
}

.sub-page {
    min-height: 1120px;
    display: grid;
    grid-template-columns: 290px minmax(0, 1fr);
    gap: 58px;
    padding: 64px 88px 88px;
}

.side-filter,
.toc {
    padding-top: 8px;
}

.side-filter p,
.toc a {
    color: #747474;
    font-size: 16px;
    font-weight: 700;
}

.platform-choice {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 44px;
    color: #686868;
    font-size: 22px;
    font-weight: 500;
}

.platform-choice span {
    color: #777;
    font-size: 22px;
}

.content-column {
    width: min(1020px, 100%);
}

.release-card,
.privacy-card,
.feedback-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 16px;
    box-shadow: 0 2px 9px rgba(0, 0, 0, .03);
}

.release-card {
    padding: 45px 42px 44px;
}

.release-card h1 {
    margin: 0 0 12px;
    font-size: 32px;
    line-height: 1.3;
}

.release-date {
    margin: 0;
    color: #6d6d6d;
    font-size: 18px;
    font-weight: 500;
}

.release-card hr,
.privacy-card hr {
    border: 0;
    border-top: 1px solid var(--line);
}

.release-card hr {
    margin: 44px 0 40px;
}

.release-card h2 {
    margin: 0 0 25px;
    color: #181818;
    font-size: 18px;
    line-height: 1.5;
}

.release-card ul {
    display: grid;
    gap: 25px;
    margin: 0;
    padding-left: 20px;
}

.release-card li {
    color: #686868;
    font-size: 17px;
    line-height: 1.65;
    font-weight: 500;
}

.release-card li::marker {
    color: var(--green-deep);
}

.timeline {
    position: relative;
    margin-top: 70px;
    padding-left: 48px;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 13px;
    left: 15px;
    bottom: 34px;
    width: 2px;
    background: #e6e6e6;
}

.timeline-item {
    position: relative;
    padding: 0 0 58px;
}

.timeline-marker {
    position: absolute;
    left: -48px;
    top: 6px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 3px solid #e5e5e5;
    background: #f7f7f7;
}

.timeline-item.current .timeline-marker {
    border-color: var(--green-deep);
}

.timeline-item.current .timeline-marker::after {
    content: "";
    position: absolute;
    inset: 7px;
    border-radius: inherit;
    background: var(--green-deep);
}

.timeline h3 {
    display: flex;
    gap: 22px;
    align-items: baseline;
    margin: 0 0 20px;
}

.timeline h3 span {
    font-size: 18px;
    font-weight: 800;
}

.timeline time {
    color: #777;
    font-size: 20px;
    font-weight: 500;
}

.timeline p {
    margin: 0 0 13px;
    color: #6f6f6f;
    font-size: 18px;
    line-height: 1.6;
}

.logs-page {
    grid-template-columns: 270px minmax(0, 1fr);
    gap: 72px;
    padding-top: 60px;
}

.release-version-nav {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
    border-left: 1px solid var(--line);
    padding: 8px 0 24px 20px;
}

.release-version-group {
    margin-bottom: 30px;
}

.release-version-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin: 0 0 26px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #747474;
    font-family: inherit;
    font-size: 17px;
    line-height: 1.3;
    font-weight: 800;
    text-align: left;
    cursor: pointer;
}

.release-version-heading span:first-child {
    white-space: nowrap;
}

.release-version-toggle {
    position: relative;
    width: 10px;
    height: 10px;
    flex: 0 0 auto;
    margin-left: 10px;
}

.release-version-toggle::before,
.release-version-toggle::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 0;
    width: 10px;
    height: 2px;
    border-radius: 99px;
    background: currentColor;
}

.release-version-toggle::after {
    transform: rotate(90deg);
    transition: transform .18s ease;
}

.release-version-heading[aria-expanded="true"] .release-version-toggle::after {
    transform: rotate(0deg);
}

.release-version-list {
    display: grid;
}

.release-version-list[hidden] {
    display: none;
}

.release-version-empty {
    margin: 0;
    color: #aaa;
    font-size: 15px;
    line-height: 1.35;
    font-weight: 700;
}

.release-version-link {
    display: block;
    margin: 0 0 20px;
    color: #747474;
    font-size: 16px;
    line-height: 1.35;
    font-weight: 800;
    transition: background .18s ease, color .18s ease;
}

.release-version-link:hover,
.release-version-link.active {
    color: var(--green-deep);
}

.release-version-link.active span {
    color: inherit;
}

.release-version-link span {
    color: inherit;
}

.release-detail-column {
    width: min(1010px, 100%);
}

.release-detail {
    width: min(1010px, 100%);
    padding: 45px 46px 50px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 16px;
    box-shadow: 0 2px 9px rgba(0, 0, 0, .03);
    animation: releaseFadeIn .2s ease both;
}

.release-detail h1 {
    margin: 0 0 19px;
    font-size: 38px;
    line-height: 1.16;
    font-weight: 800;
}

.release-detail hr {
    margin: 27px 0 34px;
    border: 0;
    border-top: 1px solid var(--line);
}

.release-log-section {
    margin-bottom: 0;
}

.release-log-section p {
    margin: 0 0 18px;
    color: #333;
    font-size: 14.5px;
    line-height: 1.8;
    font-weight: 500;
}

.release-image-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-top: 34px;
}

.release-image-grid a {
    display: block;
}

.release-image-grid img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.release-empty {
    grid-column: 1 / -1;
    width: min(720px, 100%);
    margin: 80px auto;
    text-align: center;
}

.release-empty h1 {
    margin: 0 0 14px;
    font-size: 32px;
}

.release-empty p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

@keyframes releaseFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

.privacy-page {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 88px;
    padding-top: 60px;
}

.toc {
    border-left: 1px solid var(--line);
    padding-left: 20px;
}

.toc a {
    display: block;
    margin: 0 0 18px;
    font-size: 13px;
    line-height: 1.2;
}

.privacy-card {
    width: min(1010px, 100%);
    padding: 45px 46px 50px;
}

.privacy-card h1 {
    margin: 0 0 19px;
    font-size: 38px;
    line-height: 1.16;
    font-weight: 800;
}

.policy-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 19px;
    color: #777;
    font-size: 12px;
    font-weight: 700;
}

.privacy-card hr {
    margin: 27px 0 34px;
}

.policy-section {
    margin-bottom: 34px;
}

.policy-section h2 {
    position: relative;
    margin: 0 0 22px;
    padding-left: 18px;
    font-size: 27px;
    line-height: 1.28;
    font-weight: 800;
}

.policy-section h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: .16em;
    width: 6px;
    height: 27px;
    border-radius: 99px;
    background: var(--green-deep);
}

.policy-section h3 {
    margin: 22px 0 11px;
    font-size: 19px;
    line-height: 1.35;
}

.policy-section p {
    margin: 0 0 11px;
    color: #333;
    font-size: 14.5px;
    line-height: 1.8;
    font-weight: 500;
}

.policy-sign {
    margin-top: 56px;
    padding-top: 34px;
    border-top: 1px solid var(--line);
    text-align: center;
    font-size: 13px;
    font-weight: 800;
}

.policy-sign p {
    margin: 0 0 10px;
}

.policy-sign p:last-child {
    margin-bottom: 0;
}

.feedback-page {
    min-height: 900px;
    padding: 60px 88px 88px;
    background: var(--bg);
}

.feedback-card {
    width: min(1100px, 100%);
    margin: 0 auto;
    padding: 45px 46px 50px;
}

.feedback-card h1 {
    margin: 0 0 27px;
    font-size: 38px;
    line-height: 1.16;
    font-weight: 800;
}

.feedback-frame-wrap {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
}

.feedback-frame-wrap iframe {
    display: block;
    width: 100%;
    height: min(980px, calc(100vh - 220px));
    min-height: 680px;
    border: 0;
}

.feedback-empty {
    display: grid;
    place-items: center;
    min-height: 360px;
    border: 1px dashed var(--line);
    border-radius: 12px;
    background: #fffaf4;
}

.feedback-empty p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.7;
    font-weight: 700;
}

.placeholder-page {
    min-height: 620px;
    display: grid;
    place-items: center;
    padding: 80px 20px;
}

.placeholder-page section {
    width: min(720px, 100%);
    padding: 42px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
}

.placeholder-page h1 {
    margin: 0 0 16px;
    font-size: 36px;
}

.placeholder-page p,
.download-list a {
    color: var(--muted);
    font-size: 17px;
    line-height: 1.7;
}

.download-list {
    display: grid;
    gap: 14px;
}

@media (max-width: 900px) {
    .site-nav {
        padding: 0 20px;
    }

    .site-links {
        gap: 18px;
    }

    .site-brand {
        font-size: 22px;
    }

    .site-links a {
        font-size: 14px;
    }

    .home-hero {
        min-height: 820px;
    }

    .home-hero::before {
        height: 790px;
        width: 220vw;
    }

    .hero-inner {
        padding-top: 72px;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-brand {
        margin: 18px 0 34px;
        font-size: 18px;
    }

    .hero-tagline {
        font-size: 13px;
    }

    .hero-updates {
        margin-top: 46px;
        font-size: 14px;
    }

    .download-row {
        gap: 16px;
        margin-top: 48px;
        padding-top: 34px;
    }

    .download-icon {
        width: 58px;
        height: 58px;
        border-radius: 14px;
    }

    .feature-grid,
    .footer-grid,
    .sub-page,
    .privacy-page {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        gap: 58px;
        margin-top: 70px;
    }

    .sub-page,
    .privacy-page {
        gap: 28px;
        padding: 34px 18px 60px;
    }

    .logs-page {
        grid-template-columns: 1fr;
        gap: 34px;
        padding: 34px 18px 60px;
    }

    .release-version-nav {
        position: static;
        max-height: none;
        overflow-x: auto;
        overflow-y: hidden;
        border-left: 0;
        padding: 0 0 6px;
    }

    .release-version-heading {
        margin-bottom: 14px;
        font-size: 16px;
    }

    .release-version-list {
        grid-auto-flow: column;
        grid-auto-columns: max-content;
        gap: 8px;
    }

    .release-version-list[hidden] {
        display: none;
    }

    .release-version-link {
        border: 1px solid var(--line);
        border-radius: 999px;
        margin: 0;
        padding: 10px 14px;
        background: #fffaf4;
    }

    .release-detail-column {
        width: 100%;
    }

    .release-detail {
        width: 100%;
        padding: 34px 24px;
        border-radius: 12px;
    }

    .release-detail h1 {
        font-size: 26px;
    }

    .release-image-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
    }

    .side-filter,
    .toc {
        display: none;
    }

    .privacy-card,
    .feedback-card,
    .release-card {
        padding: 34px 24px;
        border-radius: 12px;
    }

    .privacy-card h1,
    .feedback-card h1 {
        font-size: 26px;
    }

    .feedback-page {
        min-height: 760px;
        padding: 34px 18px 60px;
    }

    .feedback-frame-wrap iframe {
        height: 720px;
        min-height: 620px;
    }

    .policy-section h2 {
        font-size: 21px;
    }

    .site-footer {
        padding: 46px 22px 34px;
    }

    .footer-grid {
        gap: 28px;
    }

    .footer-bottom {
        align-items: center;
        gap: 12px;
    }
}

@media (max-width: 520px) {
    .release-image-grid {
        grid-template-columns: 1fr;
    }
}