:root {
    --background: hsl(40 20% 99%);
    --foreground: hsl(220 20% 14%);
    --card: hsl(0 0% 100%);
    --border: hsl(40 10% 90%);
    --muted: hsl(220 10% 46%);
    --primary: hsl(220 20% 14%);
    --primary-foreground: hsl(0 0% 100%);
    --accent: hsl(220 10% 96%);
    --success: hsl(150 60% 45%);
    --radius: 12px;
    --shadow-card: 0 1px 2px hsl(220 20% 14% / 0.04);
    --shadow-elevated: 0 18px 44px hsl(220 20% 14% / 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--background);
    color: var(--foreground);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--muted); }
img { max-width: 100%; height: auto; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(820px, calc(100% - 40px)); }
.muted { color: var(--muted); }
.eyebrow {
    display: inline-flex;
    margin-bottom: 14px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
}
.button, button {
    min-height: 46px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 18px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.button { display: inline-flex; align-items: center; justify-content: center; }
.button-dark { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); }
.button-light { background: var(--card); color: var(--foreground); }
.button:hover, button:hover { transform: translateY(-1px); box-shadow: var(--shadow-elevated); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: hsl(40 20% 99% / 0.9);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 220px; }
.brand-mark {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 10px;
    background: var(--foreground);
    color: var(--primary-foreground);
    font-weight: 800;
}
.brand small { display: block; color: var(--muted); font-size: 12px; font-weight: 600; }
.primary-nav { margin-left: auto; }
.menu, .footer-menu { display: flex; align-items: center; gap: 20px; margin: 0; padding: 0; list-style: none; }
.menu a { color: var(--muted); font-size: 14px; font-weight: 700; }
.menu a:hover, .current-menu-item > a { color: var(--foreground); }
.menu-toggle { display: none; background: var(--card); }

.hero { padding: 86px 0 64px; }
.linear-hero { padding: 88px 0 72px; overflow: hidden; }
.linear-hero-inner { max-width: 860px; text-align: center; }
.linear-hero h1 {
    margin: 0;
    font-size: clamp(46px, 6.4vw, 76px);
    line-height: 1.05;
    letter-spacing: 0;
}
.linear-hero p {
    max-width: 720px;
    margin: 22px auto 0;
    color: var(--muted);
    font-size: 19px;
}
.linear-hero .hero-actions { justify-content: center; margin: 30px 0 44px; }
.product-stage { perspective: 1400px; }
.workspace-shell {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    min-height: 520px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: linear-gradient(180deg, var(--card), hsl(220 10% 97%));
    box-shadow: 0 26px 80px hsl(220 20% 14% / 0.10);
}
.workspace-sidebar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 22px;
    border-right: 1px solid var(--border);
    background: hsl(220 10% 98%);
}
.workspace-sidebar strong { margin-bottom: 14px; }
.workspace-sidebar span {
    border-radius: 10px;
    padding: 10px 12px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}
.workspace-sidebar .workspace-active { background: var(--card); color: var(--foreground); box-shadow: var(--shadow-card); }
.workspace-main { display: grid; grid-template-rows: auto 1fr auto; padding: 24px; }
.workspace-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    color: var(--muted);
    font-weight: 700;
}
.workspace-board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: stretch; }
.workspace-board article {
    min-height: 260px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--card);
    padding: 22px;
    box-shadow: var(--shadow-card);
}
.workspace-board h3 { margin: 22px 0 10px; font-size: 22px; }
.workspace-board p { color: var(--muted); }
.workspace-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}
.workspace-metrics div {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: hsl(0 0% 100% / 0.72);
    padding: 16px;
}
.workspace-metrics strong { display: block; font-size: 20px; }
.workspace-metrics span { color: var(--muted); font-size: 13px; font-weight: 700; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr); gap: 48px; align-items: center; }
.hero h1, .page-hero h1 {
    margin: 0;
    font-size: clamp(44px, 6vw, 72px);
    line-height: 1.1;
    letter-spacing: 0;
}
.hero-copy p, .page-hero p, .section-head p { color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-row span, .badge, .copy-chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--card);
    padding: 8px 12px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}
.hero-visual {
    min-height: 430px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background:
        radial-gradient(circle at 30% 20%, hsl(150 60% 45% / 0.12), transparent 28%),
        linear-gradient(135deg, var(--card), hsl(220 10% 96%));
    box-shadow: var(--shadow-card);
    padding: 24px;
    display: grid;
    align-items: end;
}
.signal-panel { max-width: 360px; padding: 22px; border: 1px solid var(--border); border-radius: var(--radius); background: hsl(0 0% 100% / 0.82); }
.status-dot, .icon-dot { display: inline-block; width: 10px; height: 10px; border-radius: 999px; background: var(--success); box-shadow: 0 0 0 5px hsl(150 60% 45% / 0.1); }

.page-hero { padding: 72px 0 42px; border-bottom: 1px solid var(--border); }
.section { padding: 72px 0; }
.section.soft { background: hsl(220 10% 96% / 0.55); }
.section-head { margin-bottom: 28px; max-width: 720px; }
.section-head h2, .cta-inner h2 { margin: 0; font-size: clamp(32px, 4vw, 44px); line-height: 1.14; }
.split-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 26px; }
.split-head .section-head { margin-bottom: 0; }
.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.six { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.split-feature { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 72px; align-items: start; }
.service-list { display: grid; gap: 4px; border-top: 1px solid var(--border); }
.feature-row {
    display: grid;
    grid-template-columns: 24px 1fr;
    gap: 16px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}
.feature-row h3 { margin: 0 0 8px; font-size: 22px; }
.feature-row p { margin: 0; color: var(--muted); }
.method-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--border);
}
.method-item { min-height: 240px; background: var(--card); padding: 26px; }
.method-icon {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: var(--accent);
}
.method-icon svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: var(--foreground);
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.method-item h3 { margin: 0 0 12px; }
.method-item p { color: var(--muted); }
.faq-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 72px; align-items: start; }
.faq-grid h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.12; }
.faq-grid h2 span { display: inline-block; }
.faq-accordion {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card);
    box-shadow: var(--shadow-card);
}
.faq-accordion-head {
    min-height: 58px;
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 0 18px;
    border-bottom: 1px solid var(--border);
}
.faq-head-icon {
    position: relative;
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--accent);
}
.faq-head-icon::before {
    content: "?";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--foreground);
    font-size: 16px;
    font-weight: 800;
    line-height: 1;
}
.faq-accordion-head strong { font-size: 14px; }
.faq-accordion-head small { color: var(--muted); font-size: 12px; font-weight: 800; }
.faq-item {
    border-bottom: 1px solid var(--border);
    background: transparent;
    transition: background 220ms ease;
}
.faq-item:last-child { border-bottom: 0; }
.faq-item.is-open { background: var(--accent); }
.faq-question {
    width: 100%;
    min-height: 62px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 24px;
    align-items: center;
    gap: 16px;
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 0 18px;
    color: var(--foreground);
    text-align: left;
    box-shadow: none;
}
.faq-question:hover { transform: none; box-shadow: none; background: hsl(220 10% 96% / 0.7); }
.faq-question span { font-size: 17px; font-weight: 800; }
.faq-question i {
    width: 9px;
    height: 9px;
    justify-self: center;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: rotate(45deg);
    transition: transform 220ms ease;
}
.faq-item.is-open .faq-question i { transform: rotate(225deg); }
.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows 220ms ease, opacity 220ms ease;
}
.faq-answer > div { overflow: hidden; }
.faq-answer p {
    margin: 0;
    padding: 0 18px 20px;
    color: var(--muted);
}
.faq-item.is-open .faq-answer {
    grid-template-rows: 1fr;
    opacity: 1;
}
.repository-page { padding: 54px 0 76px; }
.repository-shell {
    display: grid;
    gap: 28px;
}
.repository-header {
    display: grid;
    justify-items: center;
    text-align: center;
}
.repository-header h1 {
    margin: 0;
    font-size: clamp(42px, 6vw, 68px);
    line-height: 1.08;
}
.repository-header p {
    max-width: 720px;
    color: var(--muted);
    font-size: 18px;
}
.repository-search {
    width: min(680px, 100%);
    margin-top: 8px;
}
.repository-search input {
    min-height: 52px;
    border-radius: 999px;
    padding: 14px 20px;
    box-shadow: var(--shadow-card);
}
.repository-layout {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
}
.repo-sidebar {
    position: sticky;
    top: 96px;
    display: grid;
    gap: 8px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card);
    box-shadow: var(--shadow-card);
}
.repo-sidebar strong {
    padding: 4px 8px 8px;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}
.repo-filter {
    width: 100%;
    min-height: 42px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--muted);
    padding: 10px 12px;
    text-align: left;
    box-shadow: none;
}
.repo-filter:hover,
.repo-filter.is-active {
    transform: none;
    background: var(--accent);
    color: var(--foreground);
    box-shadow: none;
}
.repo-content {
    display: grid;
    gap: 16px;
}
.repo-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}
.repo-toolbar strong { color: var(--foreground); }
.repo-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
.repo-card {
    min-height: 260px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
    box-shadow: var(--shadow-card);
    transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.repo-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-elevated); }
.repo-card[hidden] { display: none; }
.repo-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}
.repo-card h2 { margin: 0; font-size: 23px; line-height: 1.22; }
.repo-card p { margin: 0; color: var(--muted); }
.repo-card .button { margin-top: auto; align-self: flex-start; }
.repo-empty {
    margin: 0;
    padding: 24px;
    border: 1px dashed var(--border);
    border-radius: 16px;
    color: var(--muted);
    text-align: center;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-card);
    transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}
.card:hover { transform: translateY(-1px); box-shadow: var(--shadow-elevated); }
.card h2, .card h3 { margin-top: 10px; margin-bottom: 10px; line-height: 1.25; }
.card p { color: var(--muted); }
.compact { min-height: 170px; }
.tag-line { font-size: 13px; font-weight: 700; }
.service-stack { display: grid; gap: 18px; }
.service-row { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; }
.step span { color: var(--muted); font-weight: 800; }
.cta-band { padding-top: 0; }
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 36px; border-radius: 16px; background: var(--foreground); color: var(--primary-foreground); }
.cta-inner p { color: hsl(0 0% 100% / 0.72); }

.kb-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 32px; }
.kb-sidebar {
    border-right: 1px solid var(--border);
    padding-right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-self: start;
    position: sticky;
    top: 96px;
}
.kb-sidebar strong { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.kb-sidebar a { padding: 9px 12px; border-radius: 999px; color: var(--muted); font-weight: 700; }
.kb-sidebar a:hover { background: var(--accent); color: var(--foreground); }
.post-list { display: grid; gap: 18px; }
.article-shell h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.12; }
.article-content {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 34px;
    box-shadow: var(--shadow-card);
}
.article-content code { background: var(--accent); border-radius: 6px; padding: 2px 6px; }
pre, .article-content pre {
    overflow: auto;
    background: var(--foreground);
    color: var(--primary-foreground);
    border-radius: var(--radius);
    padding: 18px;
}
.back-link { display: inline-flex; margin-bottom: 18px; color: var(--muted); font-weight: 700; }

.filter-form { display: flex; gap: 10px; margin-top: 24px; }
input, textarea, select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    color: var(--foreground);
    padding: 13px 14px;
    font: inherit;
}
textarea { resize: vertical; }
.contact-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 24px; align-items: start; }
.contact-form { display: grid; gap: 14px; }
.contact-form label { display: grid; gap: 7px; color: var(--muted); font-weight: 700; }
.hidden-field { position: absolute; left: -9999px; }
.notice-ok { padding: 12px; border-radius: var(--radius); background: hsl(150 60% 45% / 0.1); color: var(--success); }

.prompt-modal {
    position: fixed;
    inset: 0;
    z-index: 50;
    background: hsl(220 20% 14% / 0.42);
    padding: 24px;
    display: grid;
    place-items: center;
}
.prompt-modal[hidden] { display: none; }
.prompt-dialog {
    width: min(980px, 100%);
    max-height: calc(100vh - 48px);
    overflow: auto;
    margin: 0;
    background: var(--card);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-elevated);
}
.prompt-dialog-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 24px; }
.modal-close { float: right; width: 42px; min-height: 42px; padding: 0; border-radius: 999px; background: var(--accent); }
.prompt-fields { display: grid; gap: 12px; margin-top: 18px; }
#prompt-preview { min-height: 360px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.knowledge-app { padding: 34px 0 72px; }
.knowledge-shell {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr) 270px;
    min-height: calc(100vh - 170px);
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--card);
    box-shadow: var(--shadow-card);
}
.vault-sidebar, .graph-panel {
    background: hsl(220 10% 97%);
    padding: 20px;
}
.vault-sidebar { border-right: 1px solid var(--border); }
.graph-panel { border-left: 1px solid var(--border); }
.vault-title { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.vault-title small { display: block; color: var(--muted); font-size: 12px; font-weight: 700; }
.vault-search { margin-bottom: 22px; }
.vault-search input { min-height: 40px; padding: 10px 12px; background: var(--card); }
.vault-tree { display: flex; flex-direction: column; gap: 6px; }
.vault-tree strong, .graph-panel strong { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.vault-tree a {
    display: flex;
    gap: 9px;
    align-items: center;
    padding: 9px 10px;
    border-radius: 9px;
    color: var(--muted);
    font-weight: 700;
}
.vault-tree a:hover { background: var(--card); color: var(--foreground); }
.vault-notes { padding: 34px; overflow: auto; }
.vault-heading { max-width: 720px; margin-bottom: 28px; }
.vault-heading h1 { margin: 0; font-size: clamp(38px, 5vw, 58px); line-height: 1.1; }
.vault-heading p { color: var(--muted); font-size: 17px; }
.note-list { display: grid; gap: 12px; }
.note-card a {
    display: grid;
    grid-template-columns: 14px minmax(0, 1fr);
    gap: 14px;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--card);
    transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.note-card a:hover { transform: translateY(-1px); box-shadow: var(--shadow-elevated); color: var(--foreground); }
.note-dot { width: 8px; height: 8px; margin-top: 10px; border-radius: 999px; background: var(--success); }
.note-card h2 { margin: 0 0 8px; font-size: 21px; }
.note-card p { margin: 0 0 10px; color: var(--muted); }
.note-card small { color: var(--muted); font-weight: 700; }
.graph-view {
    position: relative;
    height: 220px;
    margin: 22px 0;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: radial-gradient(circle at center, hsl(220 10% 94%), hsl(220 10% 98%));
}
.node { position: absolute; width: 14px; height: 14px; border-radius: 999px; background: var(--foreground); box-shadow: 0 0 0 6px hsl(220 20% 14% / 0.06); }
.n1 { left: 38%; top: 22%; } .n2 { left: 62%; top: 34%; } .n3 { left: 24%; top: 58%; } .n4 { left: 55%; top: 68%; } .n5 { left: 76%; top: 58%; }
.edge { position: absolute; height: 1px; background: var(--border); transform-origin: left center; }
.e1 { width: 76px; left: 41%; top: 27%; transform: rotate(24deg); }
.e2 { width: 98px; left: 29%; top: 61%; transform: rotate(-35deg); }
.e3 { width: 72px; left: 58%; top: 70%; transform: rotate(-28deg); }
.e4 { width: 82px; left: 61%; top: 39%; transform: rotate(34deg); }
.graph-meta { display: grid; gap: 10px; color: var(--muted); font-weight: 700; }
.graph-meta p { margin: 0; padding: 12px 0; border-bottom: 1px solid var(--border); }
.graph-meta span { color: var(--foreground); }

.app-detail { padding-top: 34px; }
.app-detail-hero { border-bottom: 1px solid var(--border); padding-bottom: 56px; }
.app-hero-grid { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.8fr); gap: 64px; align-items: center; }
.app-hero-grid h1 { margin: 16px 0; font-size: clamp(42px, 5.5vw, 68px); line-height: 1.08; }
.app-hero-grid p { color: var(--muted); font-size: 18px; }
.app-preview-panel {
    min-height: 360px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: linear-gradient(180deg, var(--card), hsl(220 10% 96%));
    box-shadow: var(--shadow-elevated);
}
.preview-bar { display: flex; gap: 7px; padding: 16px; border-bottom: 1px solid var(--border); }
.preview-bar span { width: 9px; height: 9px; border-radius: 999px; background: var(--border); }
.preview-content { padding: 28px; }
.preview-content strong { font-size: 24px; }
.preview-content p { color: var(--muted); }
.app-preview-image {
    overflow: hidden;
    margin-top: 24px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--card);
}
.app-preview-image img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}
.preview-placeholder {
    min-height: 220px;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 8px;
    color: var(--muted);
}
.preview-placeholder span {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: var(--accent);
    border: 1px solid var(--border);
}
.preview-placeholder strong { color: var(--foreground); font-size: 18px; }
.preview-placeholder small { font-weight: 700; }
.preview-lines { display: grid; gap: 12px; margin-top: 34px; }
.preview-lines i { display: block; height: 46px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.app-content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; align-items: start; }
.app-main-column, .app-side-column { display: grid; gap: 28px; }
.detail-block { display: grid; gap: 16px; }
.detail-block h2 { margin: 0; font-size: clamp(30px, 3vw, 40px); }
.feature-checklist { display: grid; gap: 12px; }
.feature-checklist p {
    display: grid;
    grid-template-columns: 18px 1fr;
    gap: 12px;
    margin: 0;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card);
    color: var(--muted);
    font-weight: 700;
}
.feature-checklist span { width: 9px; height: 9px; margin-top: 7px; border-radius: 999px; background: var(--success); }
.info-panel { padding: 22px; }
.info-panel h3 { margin-top: 0; }

.site-footer { border-top: 1px solid var(--border); padding: 48px 0 24px; background: var(--card); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 1fr 0.8fr; gap: 28px; }
.footer-grid h2, .footer-grid h3 { margin-top: 0; }
.footer-grid p, .footer-menu a { color: var(--muted); }
.footer-menu { align-items: flex-start; flex-direction: column; gap: 10px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; margin-top: 32px; color: var(--muted); font-size: 13px; }
.qrcode { width: 120px; border-radius: var(--radius); border: 1px solid var(--border); }
.float-contact { position: fixed; right: 22px; bottom: 22px; z-index: 30; }
.float-toggle { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); border-radius: 999px; }
.float-panel {
    display: none;
    width: 260px;
    margin-bottom: 10px;
    padding: 18px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-elevated);
}
.float-contact.is-open .float-panel { display: grid; gap: 10px; }

@media (max-width: 980px) {
    .nav-wrap { flex-wrap: wrap; padding: 14px 0; }
    .menu-toggle { display: inline-flex; margin-left: auto; }
    .primary-nav { display: none; width: 100%; order: 5; margin-left: 0; }
    .primary-nav.is-open { display: block; }
    .menu { align-items: flex-start; flex-direction: column; gap: 12px; padding: 14px 0; }
    .nav-cta { display: none; }
    .hero-grid, .service-row, .contact-grid, .prompt-dialog-grid, .split-feature, .faq-grid, .app-hero-grid, .app-content-grid, .repository-layout { grid-template-columns: 1fr; }
    .grid.three, .grid.four, .grid.six { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .workspace-shell { grid-template-columns: 1fr; }
    .workspace-sidebar { display: none; }
    .workspace-board, .workspace-metrics, .method-grid { grid-template-columns: 1fr; }
    .knowledge-shell { grid-template-columns: 1fr; }
    .vault-sidebar, .graph-panel { border: 0; }
    .graph-panel { display: none; }
    .kb-layout { grid-template-columns: 1fr; }
    .kb-sidebar { position: static; border-right: 0; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 18px; }
    .repo-sidebar { position: static; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .wrap, .narrow { width: min(100% - 28px, 1160px); }
    .hero, .linear-hero, .section { padding: 48px 0; }
    .page-hero { padding: 48px 0 30px; }
    .grid.two, .grid.three, .grid.four, .grid.six { grid-template-columns: 1fr; }
    .repo-grid { grid-template-columns: 1fr; }
    .repo-toolbar { flex-direction: column; }
    .split-head, .cta-inner, .footer-bottom, .filter-form { align-items: stretch; flex-direction: column; }
    .hero-visual { min-height: 280px; }
    .workspace-shell { min-height: auto; }
    .workspace-main, .vault-notes { padding: 18px; }
    .workspace-board article { min-height: 180px; }
    .article-content, .card, .cta-inner { padding: 20px; }
    .footer-grid { grid-template-columns: 1fr; }
    .prompt-modal { padding: 12px; }
    .prompt-dialog { max-height: calc(100vh - 24px); padding: 18px; }
}