:root {
    --ink: #17231f;
    --ink-soft: #34443e;
    --paper: #f5f6f1;
    --surface: #ffffff;
    --pine: #1f6a50;
    --pine-dark: #154a39;
    --sun: #f2b84b;
    --line: #d9ded7;
    --muted: #65706b;
    --container: 1120px;
    --reading: 760px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    line-height: 1.75;
}

a {
    color: var(--pine-dark);
    text-underline-offset: 3px;
}

a:focus-visible {
    outline: 3px solid var(--sun);
    outline-offset: 3px;
}

.public-container {
    width: min(var(--container), calc(100% - 40px));
    margin: 0 auto;
}

.public-reading-width {
    max-width: var(--reading);
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1000;
    padding: 9px 13px;
    color: #ffffff;
    background: var(--ink);
    border-radius: 4px;
    transform: translateY(-160%);
}

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

.public-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
}

.public-nav {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.public-brand {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    text-decoration: none;
}

.public-brand img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.public-brand span {
    display: grid;
    line-height: 1.2;
}

.public-brand strong {
    font-size: 16px;
}

.public-brand small {
    margin-top: 3px;
    color: var(--muted);
    font-size: 11px;
}

.public-nav nav,
.public-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
}

.public-nav nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--ink-soft);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

#main-content {
    scroll-margin-top: 76px;
}

.public-hero {
    padding: 64px 0 48px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.public-kicker {
    margin: 0 0 10px;
    color: var(--pine);
    font-size: 13px;
    font-weight: 800;
}

.public-hero h1 {
    margin: 0;
    font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
    font-size: 44px;
    line-height: 1.2;
}

.public-lead {
    margin: 18px 0 0;
    color: var(--ink-soft);
    font-size: 17px;
}

.public-updated {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.public-content {
    padding-top: 56px;
    padding-bottom: 72px;
}

.public-content section {
    padding: 0 0 34px;
}

.public-content section + section {
    padding-top: 34px;
    border-top: 1px solid var(--line);
}

.public-content h2 {
    margin: 0 0 12px;
    font-size: 22px;
    line-height: 1.4;
}

.public-content p,
.public-content ul {
    margin: 0;
    color: var(--ink-soft);
}

.public-content p + p,
.public-content p + ul,
.public-content ul + p {
    margin-top: 14px;
}

.public-content li + li {
    margin-top: 9px;
}

.contact-email a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--ink);
    font-size: 24px;
    font-weight: 800;
    overflow-wrap: anywhere;
}

.public-button {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
    padding: 0 18px;
    color: #ffffff;
    background: var(--pine);
    border-radius: 6px;
    font-weight: 750;
    text-decoration: none;
}

.public-button:hover {
    background: var(--pine-dark);
}

.public-notice {
    padding: 20px 0 0;
    border-top: 3px solid var(--sun);
}

.public-notice p {
    margin-top: 8px;
}

.public-footer {
    padding: 30px 0 calc(30px + env(safe-area-inset-bottom));
    color: #cbd4d0;
    background: #101714;
}

.public-footer-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.public-footer p {
    margin: 0;
    color: #9fabaa;
    font-size: 12px;
}

.public-footer a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: #dce4e0;
    font-size: 12px;
}

@media (max-width: 700px) {
    .public-container {
        width: min(var(--container), calc(100% - 32px));
    }

    .public-nav {
        min-height: 64px;
    }

    .public-nav nav a {
        display: none;
    }

    .public-nav nav a[href="/#products"] {
        display: inline-flex;
    }

    .public-hero {
        padding: 46px 0 36px;
    }

    .public-hero h1 {
        font-size: 34px;
    }

    .public-lead {
        font-size: 15px;
    }

    .public-content {
        padding-top: 40px;
        padding-bottom: 56px;
    }

    .public-content h2 {
        font-size: 20px;
    }

    .contact-email a {
        font-size: 20px;
    }

    .public-footer-grid {
        align-items: flex-start;
        flex-direction: column;
    }
}

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