:root {
    --bg: #0a0e17;
    --bg-elevated: #0f1521;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-strong: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(124, 156, 255, 0.34);
    --text: #e8ecf4;
    --muted: #8b95a8;
    --accent: #7c9cff;
    --accent-soft: rgba(124, 156, 255, 0.14);
    --warm: #ff9b7a;
    --success: #70d6a3;
    --display: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
    --body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --utility: "JetBrains Mono", "Cascadia Mono", Consolas, monospace;
    --utility-label-size: 0.68rem;
    --utility-micro-size: 0.62rem;
    --page-padding: clamp(1.25rem, 4vw, 4.5rem);
    --section-space: clamp(4.25rem, 7vw, 6.75rem);
    --content-width: 1180px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: var(--body);
    font-size: 1rem;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
}

body::selection {
    background: var(--accent);
    color: var(--bg);
}

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

:focus-visible {
    outline: 2px solid var(--warm);
    outline-offset: 4px;
}

.ambient-glow,
.ambient-noise {
    position: fixed;
    z-index: -2;
    inset: 0;
    pointer-events: none;
}

.ambient-glow {
    background:
        radial-gradient(ellipse 80% 50% at 20% -10%, rgba(124, 156, 255, 0.22), transparent 55%),
        radial-gradient(ellipse 60% 40% at 90% 10%, rgba(255, 155, 122, 0.12), transparent 50%),
        radial-gradient(ellipse 50% 35% at 50% 100%, rgba(124, 156, 255, 0.08), transparent 45%);
}

.ambient-noise {
    z-index: -1;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--text);
    color: var(--bg);
    transform: translateY(-160%);
    transition: transform 180ms ease;
}

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

.site-header {
    position: fixed;
    z-index: 50;
    top: 0;
    right: 0;
    left: 0;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 1rem var(--page-padding);
    border-bottom: 1px solid transparent;
    transition: background-color 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled {
    border-color: var(--border);
    background: rgba(10, 14, 23, 0.82);
    backdrop-filter: blur(18px);
}

.identity {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: 0.75rem;
}

.identity__mark {
    display: grid;
    width: 2.4rem;
    height: 2.4rem;
    place-items: center;
    border: 1px solid var(--border-strong);
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.88rem;
    font-weight: 700;
}

.identity__copy {
    display: grid;
    line-height: 1.2;
}

.identity__copy strong {
    font-size: 0.84rem;
    font-weight: 650;
}

.identity__copy small {
    margin-top: 0.2rem;
    color: var(--muted);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.12em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2.5vw, 2.5rem);
    color: var(--muted);
    font-size: 0.78rem;
}

.site-nav a {
    transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--text);
}

.header-link {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    justify-self: end;
    gap: 0.65rem;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 0.76rem;
    font-weight: 600;
    transition: border-color 160ms ease, background-color 160ms ease;
}

.header-link:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

/* 头部右侧操作区（语言切换 + 联系按钮） */
.header-actions {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: 0.85rem;
}

/* 语言切换按钮组 */
.language-switch {
    display: flex;
    border: 1px solid var(--border);
    border-radius: 0;
}

.language-switch button {
    min-width: 2.75rem;
    padding: 0.45rem 0.55rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--muted);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    font-weight: 600;
    letter-spacing: 0.06em;
    cursor: pointer;
    transition: background-color 180ms ease, color 180ms ease;
}

.language-switch button + button {
    border-left: 1px solid var(--border);
}

.language-switch button[aria-pressed="true"] {
    background: var(--accent-soft);
    color: var(--accent);
}

.language-switch button:hover:not([aria-pressed="true"]) {
    color: var(--text);
    background: var(--surface);
}

/* 404 页面顶部栏 */
.error-shell__top {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.hero {
    display: grid;
    width: min(100%, calc(var(--content-width) + (var(--page-padding) * 2)));
    min-height: 100svh;
    grid-template-columns: minmax(0, 0.92fr) minmax(25rem, 1.08fr);
    gap: clamp(3rem, 5vw, 5rem);
    align-items: center;
    margin: 0 auto;
    padding: clamp(7.5rem, 10vw, 9rem) var(--page-padding) clamp(4.5rem, 7vw, 6rem);
}

.status-line,
.hero__name,
.section-label,
.signal-console,
.technology-strip,
.product-identity,
.product-workbench,
.product-release-note,
.project__meta,
.project__code,
.project__ai-badge,
.project__ownership-badge,
.project-flow,
.project-domain-map,
.project-evidence,
.capability-row__domain,
.capability-row ul,
.notes__topics span {
    font-family: var(--utility);
}

.status-line {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0 2.4rem;
    color: var(--muted);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
}

.status-line__dot {
    width: 0.48rem;
    height: 0.48rem;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 0 rgba(112, 214, 163, 0.35);
    animation: availability 2.6s ease-out infinite;
}

.hero__name {
    margin: 0 0 1.25rem;
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.15em;
}

.hero__title {
    max-width: 18ch;
    margin: 0;
    font-family: var(--display);
    font-size: clamp(2.4rem, 3.7vw, 3.6rem);
    font-weight: 680;
    letter-spacing: -0.045em;
    line-height: 1.16;
}

.hero__title-accent {
    background: linear-gradient(112deg, var(--text) 5%, var(--accent) 56%, var(--warm));
    background-clip: text;
    color: transparent;
}

.hero__intro {
    max-width: 43rem;
    margin: 1.6rem 0 0;
    color: var(--muted);
    font-size: clamp(0.95rem, 1.15vw, 1.06rem);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.9rem;
}

.button {
    display: inline-flex;
    min-height: 3.1rem;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    padding: 0.72rem 1.15rem;
    border: 1px solid transparent;
    font-size: 0.82rem;
    font-weight: 650;
    color: var(--text);
    transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

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

.button--primary {
    background: var(--accent);
    color: var(--bg);
}

.button--primary:hover {
    background: #91adff;
}

.button--ghost {
    border-color: var(--border);
    background: var(--surface);
}

.button--ghost:hover {
    border-color: var(--warm);
}

.hero__facts {
    display: grid;
    max-width: 43rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 2.5rem 0 0;
    padding: 1.15rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.hero__facts div {
    display: grid;
    gap: 0.2rem;
    padding-right: 1rem;
}

.hero__facts div + div {
    padding-left: 1.2rem;
    border-left: 1px solid var(--border);
}

.hero__facts dt {
    color: var(--muted);
    font-size: 0.68rem;
}

.hero__facts dd {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
}

.signal-console {
    position: relative;
    border: 1px solid var(--border-strong);
    background: linear-gradient(150deg, rgba(124, 156, 255, 0.08), rgba(255, 255, 255, 0.018));
    box-shadow: 0 30px 100px -55px rgba(124, 156, 255, 0.72);
}

.signal-console::before,
.signal-console::after {
    position: absolute;
    width: 1rem;
    height: 1rem;
    border-color: var(--warm);
    content: "";
}

.signal-console::before {
    top: -1px;
    left: -1px;
    border-top: 2px solid;
    border-left: 2px solid;
}

.signal-console::after {
    right: -1px;
    bottom: -1px;
    border-right: 2px solid;
    border-bottom: 2px solid;
}

.signal-console__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.09em;
}

.signal-console__live {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--success);
}

.signal-console__live i {
    width: 0.36rem;
    height: 0.36rem;
    border-radius: 50%;
    background: currentColor;
}

.signal-console__viewport {
    position: relative;
    min-height: 25rem;
    padding: clamp(1.75rem, 3vw, 2.4rem) clamp(1.25rem, 3vw, 2.25rem);
    overflow: hidden;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 24px 24px;
}

.signal-path {
    position: absolute;
    top: 3.85rem;
    right: 3.25rem;
    left: 3.25rem;
    height: 1px;
}

.signal-path__line {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--accent), var(--warm));
    opacity: 0.42;
}

.signal-path__pulse {
    position: absolute;
    top: -0.22rem;
    left: 0;
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: var(--text);
    box-shadow: 0 0 1rem var(--accent);
    animation: signal-travel 4.2s cubic-bezier(0.42, 0, 0.58, 1) infinite;
}

.signal-nodes {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin: 0;
    padding: 0;
    list-style: none;
}

.signal-nodes li {
    position: relative;
    display: grid;
    gap: 0.35rem;
    justify-items: center;
    text-align: center;
}

.signal-nodes li::before {
    width: 0.72rem;
    height: 0.72rem;
    margin-bottom: 1.1rem;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: var(--bg-elevated);
    content: "";
}

.signal-nodes .signal-node--active::before {
    border-color: var(--warm);
    background: var(--warm);
    box-shadow: 0 0 1.4rem rgba(255, 155, 122, 0.72);
}

.signal-node__index {
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.signal-nodes strong {
    color: var(--text);
    font-size: 0.86rem;
}

.signal-nodes small {
    color: var(--muted);
    font-family: var(--body);
    font-size: var(--utility-micro-size);
}

.signal-log {
    margin-top: 3.25rem;
    padding: 1rem;
    border: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.2);
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.signal-log p {
    display: grid;
    grid-template-columns: 7.4rem 1fr;
    gap: 0.6rem;
    margin: 0;
}

.signal-log p + p {
    margin-top: 0.42rem;
}

.signal-log span {
    color: rgba(232, 236, 244, 0.38);
}

.signal-log__accent {
    color: var(--success);
}

.signal-console__scope {
    margin-top: 1.25rem;
    opacity: 0.7;
}

.signal-console__scope svg {
    display: block;
    width: 100%;
    height: auto;
}

.signal-console__scope path {
    fill: none;
    stroke: var(--accent);
    stroke-linecap: square;
    stroke-width: 2;
    vector-effect: non-scaling-stroke;
}

.signal-console__caption {
    margin: 0;
    padding: 0.8rem 1rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-family: var(--body);
    font-size: 0.7rem;
    text-align: right;
}

.technology-strip {
    display: flex;
    justify-content: center;
    gap: clamp(1rem, 4vw, 3.75rem);
    padding: 1rem var(--page-padding);
    overflow: hidden;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    color: rgba(232, 236, 244, 0.34);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.1em;
    white-space: nowrap;
}

.section {
    width: min(100%, calc(var(--content-width) + (var(--page-padding) * 2)));
    margin: 0 auto;
    padding: var(--section-space) var(--page-padding);
    scroll-margin-top: 4.75rem;
}

.section + .section {
    border-top: 1px solid var(--border);
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(11rem, 0.27fr) minmax(0, 0.73fr);
    gap: clamp(2rem, 4vw, 4rem);
    margin-bottom: clamp(2.75rem, 4vw, 4rem);
}

.section-label {
    margin: 0;
    color: var(--accent);
    font-size: var(--utility-label-size);
    font-weight: 700;
    letter-spacing: 0.12em;
}

.section-heading h2,
.notes h2,
.contact h2 {
    margin: 0;
    font-family: var(--display);
    max-width: 24ch;
    font-size: clamp(1.85rem, 3vw, 2.65rem);
    font-weight: 650;
    letter-spacing: -0.045em;
    line-height: 1.22;
}

.section-heading > div > p {
    max-width: 43rem;
    margin: 1.1rem 0 0;
    color: var(--muted);
}

.product-showcase {
    display: grid;
    grid-template-columns: minmax(19rem, 0.82fr) minmax(0, 1.18fr);
    overflow: hidden;
    border: 1px solid var(--border-strong);
    background: linear-gradient(135deg, rgba(124, 156, 255, 0.085), rgba(255, 255, 255, 0.018) 42%);
    box-shadow: 0 32px 110px -72px rgba(124, 156, 255, 0.9);
}

.product-copy {
    padding: clamp(1.6rem, 3.5vw, 3.2rem);
}

.product-identity {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.product-identity__mark {
    display: grid;
    width: 3.35rem;
    height: 3.35rem;
    place-items: center;
    border: 1px solid var(--accent);
    background:
        linear-gradient(135deg, rgba(124, 156, 255, 0.2), rgba(112, 214, 163, 0.08)),
        var(--bg-elevated);
    color: var(--text);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    box-shadow: inset 0 0 0 0.35rem rgba(10, 14, 23, 0.65);
}

.product-identity > div {
    display: grid;
    gap: 0.18rem;
}

.product-identity strong {
    font-family: var(--display);
    font-size: 1.05rem;
    letter-spacing: -0.025em;
}

.product-identity span:last-child {
    color: var(--accent);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.1em;
}

.product-copy__lede {
    margin: 1.8rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.product-features {
    margin: 2rem 0 0;
    padding: 0;
    border-top: 1px solid var(--border);
    list-style: none;
}

.product-features li {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--border);
}

.product-features strong {
    font-family: var(--utility);
    font-size: 0.65rem;
    font-weight: 650;
    letter-spacing: 0.04em;
}

.product-features span {
    color: var(--muted);
    font-size: 0.76rem;
}

.product-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.8rem;
}

.product-release-note {
    margin: 1rem 0 0;
    color: rgba(232, 236, 244, 0.44);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.035em;
}

.product-workbench {
    min-width: 0;
    border-left: 1px solid var(--border-strong);
    background: rgba(4, 8, 15, 0.74);
}

.product-workbench__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 3.25rem;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.08em;
}

.product-workbench__local {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--success);
}

.product-workbench__local i {
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 0.25rem rgba(112, 214, 163, 0.1);
}

.product-workbench__body {
    padding: clamp(1rem, 2.5vw, 2rem);
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 24px 24px;
}

.product-source-row {
    display: grid;
    grid-template-columns: 1.4fr 1.4fr 0.65fr;
    gap: 0.6rem;
}

.product-source-row > span {
    min-width: 0;
    overflow: hidden;
    padding: 0.72rem 0.8rem;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.025);
    color: var(--text);
    font-size: var(--utility-micro-size);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.product-source-row small {
    margin-right: 0.45rem;
    color: var(--accent);
    font: inherit;
}

.product-signal-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 0.85rem;
}

.product-signal {
    padding: 0.4rem 0.55rem;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.025);
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.product-signal b {
    margin-left: 0.35rem;
    color: var(--text);
    font-weight: 600;
}

.product-signal--blue {
    border-left-color: var(--accent);
}

.product-signal--orange {
    border-left-color: var(--warm);
}

.product-signal--green {
    border-left-color: var(--success);
}

.product-chart {
    position: relative;
    height: 16.5rem;
    margin-top: 0.85rem;
    overflow: hidden;
    border: 1px solid var(--border);
    background:
        linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        rgba(8, 13, 23, 0.92);
    background-size: 100% 25%, 12.5% 100%, auto;
}

.product-chart svg {
    position: absolute;
    inset: 1.3rem 1.5rem 1.1rem;
    width: calc(100% - 3rem);
    height: calc(100% - 2.4rem);
    overflow: visible;
}

.product-chart__line {
    fill: none;
    stroke-width: 2.5;
    vector-effect: non-scaling-stroke;
}

.product-chart__line--blue {
    stroke: var(--accent);
}

.product-chart__line--orange {
    stroke: var(--warm);
}

.product-chart__line--green {
    stroke: var(--success);
}

.product-chart__axis {
    position: absolute;
    z-index: 1;
    top: 0.45rem;
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.product-chart__axis--left {
    left: 0.55rem;
    color: var(--accent);
}

.product-chart__axis--right {
    right: 0.55rem;
    color: var(--warm);
}

.product-chart__cursor {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 62%;
    width: 1px;
    background: rgba(232, 236, 244, 0.55);
    box-shadow: 0 0 0.8rem rgba(232, 236, 244, 0.2);
    animation: chart-scan 5.5s ease-in-out infinite alternate;
}

.product-chart__reading {
    position: absolute;
    right: 0.55rem;
    bottom: 0.45rem;
    color: rgba(232, 236, 244, 0.55);
    font-size: var(--utility-micro-size);
}

.product-workbench__footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.2rem;
    margin-top: 0.9rem;
    color: rgba(232, 236, 244, 0.4);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.07em;
}

.product-workbench__footer span::before {
    margin-right: 0.38rem;
    color: var(--success);
    content: "●";
}

.capability-matrix {
    border-top: 1px solid var(--border);
}

.capability-row {
    display: grid;
    grid-template-columns: minmax(9rem, 0.2fr) minmax(13rem, 0.27fr) minmax(17rem, 0.37fr) minmax(8rem, 0.16fr);
    gap: clamp(1rem, 3vw, 3rem);
    align-items: center;
    min-height: 8.25rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    transition: padding 180ms ease, background-color 180ms ease;
}

.capability-row:hover {
    padding-right: 1.25rem;
    padding-left: 1.25rem;
    background: var(--surface);
}

.capability-row__domain {
    margin: 0;
    color: var(--muted);
    font-size: var(--utility-label-size);
    letter-spacing: 0.08em;
}

.capability-row h3 {
    margin: 0;
    font-size: clamp(1.15rem, 2vw, 1.6rem);
    letter-spacing: -0.03em;
}

.capability-row > p:not(.capability-row__domain) {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.capability-row ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
    margin: 0;
    padding: 0;
    list-style: none;
}

.capability-row li {
    padding: 0.25rem 0.45rem;
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.project-list {
    border-top: 1px solid var(--border);
}

.project {
    position: relative;
    display: grid;
    grid-template-columns: minmax(12rem, 0.28fr) minmax(0, 0.72fr);
    gap: clamp(2rem, 6vw, 6rem);
    padding: clamp(2.2rem, 3.5vw, 3.25rem) 0 clamp(3.5rem, 7vw, 7rem);
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.project::before {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 2px;
    background: linear-gradient(var(--accent), var(--warm));
    content: "";
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 280ms ease;
}

.project:hover::before {
    transform: scaleY(1);
}

.project--featured {
    padding-right: clamp(1rem, 2.4vw, 2rem);
    padding-left: clamp(1rem, 2.4vw, 2rem);
    border-right: 1px solid var(--border);
    border-left: 1px solid var(--border);
    background:
        linear-gradient(115deg, rgba(124, 156, 255, 0.075), transparent 44%),
        linear-gradient(300deg, rgba(255, 155, 122, 0.045), transparent 40%);
}

.project--featured::before {
    width: 3px;
    transform: scaleY(1);
}

.project--featured .project__body {
    max-width: 53rem;
}

.project--independent {
    padding-right: clamp(1rem, 2.4vw, 2rem);
    padding-left: clamp(1rem, 2.4vw, 2rem);
    border-right: 1px solid var(--border);
    border-left: 1px solid var(--border);
    background:
        linear-gradient(112deg, rgba(255, 155, 122, 0.065), transparent 42%),
        linear-gradient(300deg, rgba(112, 214, 163, 0.04), transparent 38%);
}

.project--independent::before {
    width: 3px;
    background: linear-gradient(var(--warm), var(--accent));
    transform: scaleY(1);
}

.project--independent .project__body {
    max-width: 53rem;
}

.project__meta {
    position: relative;
    z-index: 1;
}

.project__meta p {
    margin: 0 0 0.65rem;
    color: var(--accent);
    font-size: var(--utility-label-size);
    letter-spacing: 0.09em;
}

.project__meta span {
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.project__meta .project__status {
    display: flex;
    width: fit-content;
    align-items: center;
    gap: 0.45rem;
    margin-top: 1.15rem;
    color: var(--success);
    letter-spacing: 0.08em;
}

.project__status i {
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 0.22rem rgba(112, 214, 163, 0.12);
}

.project__meta .project__status--ownership {
    color: var(--warm);
}

.project__body {
    position: relative;
    z-index: 1;
    max-width: 47rem;
}

.project__company {
    margin: 0 0 0.6rem;
    color: var(--muted);
    font-size: 0.76rem;
}

.project__title-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1rem;
    align-items: center;
}

.project__ai-badge {
    padding: 0.3rem 0.5rem;
    border: 1px solid rgba(255, 155, 122, 0.34);
    background: rgba(255, 155, 122, 0.075);
    color: var(--warm);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.06em;
    white-space: nowrap;
}

.project__ownership-badge {
    padding: 0.3rem 0.5rem;
    border: 1px solid rgba(112, 214, 163, 0.32);
    background: rgba(112, 214, 163, 0.065);
    color: var(--success);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.06em;
    white-space: nowrap;
}

.project__body h3 {
    margin: 0;
    font-size: clamp(1.35rem, 2vw, 1.8rem);
    font-weight: 600;
    letter-spacing: -0.035em;
}

.project__body > p:not(.project__company) {
    margin: 1rem 0 0;
    color: var(--muted);
}

.project-flow {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 1.75rem 0 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    list-style: none;
}

.project-flow::before {
    position: absolute;
    z-index: 2;
    top: 0;
    right: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--success), var(--warm));
    content: "";
}

.project-flow li {
    display: grid;
    min-height: 7.2rem;
    align-content: center;
    padding: 1rem;
    background: rgba(10, 14, 23, 0.38);
}

.project-flow li + li {
    border-left: 1px solid var(--border);
}

.project-flow span,
.project-flow small {
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.project-flow span {
    letter-spacing: 0.06em;
}

.project-flow strong {
    margin: 0.35rem 0 0.15rem;
    color: var(--text);
    font-family: var(--body);
    font-size: 0.88rem;
    font-weight: 600;
}

.project__body .project-domain-map {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin: 1.75rem 0 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    list-style: none;
}

.project-domain-map::before {
    position: absolute;
    z-index: 2;
    top: 0;
    right: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--warm), var(--accent), var(--success));
    content: "";
}

.project-domain-map li {
    display: grid;
    min-height: 7.2rem;
    align-content: center;
    padding: 1rem;
    background: rgba(10, 14, 23, 0.38);
}

.project-domain-map li::before {
    content: none;
}

.project-domain-map li + li {
    border-left: 1px solid var(--border);
}

.project-domain-map span,
.project-domain-map small {
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.project-domain-map span {
    letter-spacing: 0.06em;
}

.project-domain-map strong {
    margin: 0.35rem 0 0.15rem;
    color: var(--text);
    font-family: var(--body);
    font-size: 0.88rem;
    font-weight: 600;
}

.project-evidence {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    border-left: 1px solid var(--border);
}

.project-evidence--four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.project-evidence--four div {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0.2rem;
}

.project-evidence div {
    display: flex;
    min-height: 4.7rem;
    align-items: baseline;
    gap: 0.55rem;
    padding: 1rem;
}

.project-evidence div + div {
    border-left: 1px solid var(--border);
}

.project-evidence dt {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 700;
}

.project-evidence dd {
    margin: 0;
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.project__body ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem 1.35rem;
    margin: 1.5rem 0 0;
    padding: 0;
    color: var(--text);
    font-size: 0.76rem;
    list-style: none;
}

.project__body li::before {
    margin-right: 0.5rem;
    color: var(--warm);
    content: "+";
}

.project__code {
    position: absolute;
    z-index: 0;
    right: 32px;
    bottom: 28px;
    color: rgba(105, 130, 170, 0.26);
    font-size: clamp(4.5rem, 7vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.12em;
    line-height: 0.8;
    pointer-events: none;
}

.experience-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.66fr) minmax(17rem, 0.34fr);
    gap: clamp(3rem, 8vw, 8rem);
}

.timeline {
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--border);
    list-style: none;
}

.timeline__item {
    display: grid;
    grid-template-columns: 10rem 1fr;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
}

.timeline__date {
    color: var(--accent);
    font-family: var(--utility);
    font-size: var(--utility-label-size);
}

.timeline h3 {
    margin: 0;
    font-size: 1.1rem;
}

.timeline p {
    margin: 0.35rem 0 0;
    color: var(--muted);
    font-size: 0.82rem;
}

.profile-note {
    align-self: start;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid var(--border-strong);
    background: linear-gradient(145deg, rgba(124, 156, 255, 0.1), rgba(255, 155, 122, 0.035));
}

.profile-note blockquote {
    margin: 2rem 0 1.5rem;
    font-size: clamp(1.1rem, 1.7vw, 1.35rem);
    font-weight: 550;
    letter-spacing: -0.035em;
    line-height: 1.55;
}

.profile-note > p:last-child {
    margin: 0;
    color: var(--muted);
    font-size: 0.82rem;
}

.notes {
    display: grid;
    grid-template-columns: minmax(0, 0.55fr) minmax(22rem, 0.45fr);
    gap: clamp(3rem, 8vw, 8rem);
    align-items: end;
}

.notes h2 {
    margin-top: 1.5rem;
}

.notes__intro > p:not(.section-label) {
    max-width: 39rem;
    margin: 1.5rem 0 0;
    color: var(--muted);
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--accent);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 650;
}

.notes__topics {
    border-top: 1px solid var(--border);
}

.notes__topics > div {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 0.3rem 1rem;
    padding: 1.35rem 0;
    border-bottom: 1px solid var(--border);
}

.notes__topics span {
    grid-row: 1 / 3;
    color: var(--muted);
    font-size: var(--utility-micro-size);
}

.notes__topics strong {
    font-size: 1.05rem;
}

.notes__topics p {
    margin: 0;
    color: var(--muted);
    font-size: 0.75rem;
}

/* 内容平台入口组（hero 首屏 chip） */
.platform-row {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.platform-chip {
    display: inline-flex;
    min-height: 2.3rem;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    font-family: var(--utility);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: pointer;
    transition: transform 160ms ease, border-color 160ms ease, color 160ms ease;
}

.platform-chip:hover {
    border-color: var(--accent);
    color: var(--text);
    transform: translateY(-2px);
}

.platform-chip__qr {
    color: var(--accent);
    font-size: 0.8rem;
}

/* 内容平台卡片组（notes 区块） */
.platform-cards {
    display: grid;
    gap: 0.4rem;
    margin-top: 2.4rem;
}

.platform-card {
    display: grid;
    grid-template-columns: 3rem 1fr auto;
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 1rem;
    padding: 0.95rem 0.4rem;
    border: 0;
    border-bottom: 1px solid var(--border);
    background: none;
    color: var(--text);
    text-align: left;
    font: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 160ms ease, padding-left 160ms ease;
}

.platform-card:hover {
    background: var(--accent-soft);
    padding-left: 0.85rem;
}

.platform-card__mark {
    grid-row: 1 / 3;
    color: var(--accent);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.1em;
}

.platform-card strong {
    font-size: 0.95rem;
    font-weight: 650;
}

.platform-card small {
    color: var(--muted);
    font-size: 0.72rem;
}

.platform-card > i {
    grid-row: 1 / 3;
    color: var(--muted);
    font-style: normal;
    font-size: 0.85rem;
}

.platform-card:hover > i {
    color: var(--accent);
}

.platform-card__qr {
    color: var(--accent);
}

/* 二维码弹窗 */
.qr-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: 1.5rem;
}

.qr-modal[hidden] {
    display: none;
}

.qr-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 23, 0.82);
    backdrop-filter: blur(4px);
}

.qr-modal__panel {
    position: relative;
    width: min(90vw, 24rem);
    padding: 2.2rem 1.8rem 1.7rem;
    border: 1px solid var(--border-strong);
    background: var(--bg-elevated);
    box-shadow: 0 30px 100px -55px rgba(124, 156, 255, 0.55);
    text-align: center;
}

.qr-modal__close {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    width: 2rem;
    height: 2rem;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1;
    cursor: pointer;
    transition: color 160ms ease, border-color 160ms ease;
}

.qr-modal__close:hover {
    border-color: var(--warm);
    color: var(--text);
}

.qr-modal__panel h3 {
    margin: 0 0 1.3rem;
    font-family: var(--display);
    font-size: 1.15rem;
    font-weight: 680;
    letter-spacing: 0.02em;
}

.qr-modal__frame {
    display: grid;
    place-items: center;
    padding: 0.8rem;
    background: #fff;
    border-radius: 0.4rem;
}

.qr-modal__frame img {
    display: block;
    max-width: 100%;
    max-height: min(62vh, 30rem);
    width: auto;
    height: auto;
    object-fit: contain;
}

.qr-modal__hint {
    margin: 1.1rem 0 0;
    color: var(--muted);
    font-size: 0.75rem;
}

/* 第二大脑公开问答入口 */
.second-brain-entry {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2rem;
    align-items: center;
    margin-top: 2.4rem;
    padding: 1.35rem 1.4rem 1.4rem;
    overflow: hidden;
    border: 1px solid rgba(124, 156, 255, 0.46);
    background:
        linear-gradient(120deg, rgba(124, 156, 255, 0.14), rgba(124, 156, 255, 0.035) 52%, rgba(255, 155, 122, 0.08)),
        var(--bg-elevated);
    box-shadow: 0 1.5rem 3.5rem -2.8rem rgba(124, 156, 255, 0.75);
}

.second-brain-entry::after {
    position: absolute;
    z-index: -1;
    top: -5rem;
    right: -3rem;
    width: 15rem;
    height: 15rem;
    border: 1px solid rgba(124, 156, 255, 0.2);
    outline: 1px solid rgba(124, 156, 255, 0.08);
    outline-offset: 0.55rem;
    content: "";
    transform: rotate(45deg);
}

.second-brain-entry__copy {
    min-width: 0;
}

.second-brain-entry__topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.second-brain-entry__label,
.second-brain-entry__status,
.second-brain-entry__meta {
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.08em;
}

.second-brain-entry__label {
    color: var(--accent);
    letter-spacing: 0.1em;
}

.second-brain-entry__status {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--success);
    white-space: nowrap;
}

.second-brain-entry__status > span:first-child {
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 0.22rem rgba(112, 214, 163, 0.12);
}

.second-brain-entry h3 {
    margin: 0.7rem 0 0;
    color: var(--text);
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    line-height: 1.25;
}

.second-brain-entry p {
    max-width: 34rem;
    margin: 0.65rem 0 0;
    color: #b8c2d5;
    font-size: 0.82rem;
    line-height: 1.75;
}

.second-brain-entry__meta {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-top: 0.9rem;
    color: #96a6c5;
}

.second-brain-entry__meta > span:last-child {
    color: var(--accent);
    font-size: 0.9rem;
}

.second-brain-entry__button {
    min-width: 10.5rem;
    min-height: 3.55rem;
    padding: 0.8rem 1.05rem;
    border-color: var(--accent);
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0.8rem 1.8rem -1.15rem rgba(124, 156, 255, 0.9);
}

.second-brain-entry__button:hover,
.second-brain-entry__button:focus-visible {
    border-color: #a8bcff;
    background: #a8bcff;
    color: var(--bg);
    box-shadow: 0 1rem 2rem -1rem rgba(124, 156, 255, 0.95);
}

.second-brain-entry .button {
    white-space: nowrap;
}

/* 第二大脑问答弹窗 */
.brain-modal {
    position: fixed;
    inset: 0;
    z-index: 1001;
    display: grid;
    place-items: center;
    padding: 1rem;
}

.brain-modal[hidden] {
    display: none;
}

.brain-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 23, 0.86);
    backdrop-filter: blur(8px);
}

.brain-modal__panel {
    position: relative;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    width: min(100%, 42rem);
    max-height: min(90vh, 46rem);
    overflow: hidden;
    border: 1px solid var(--border-strong);
    background: linear-gradient(145deg, rgba(124, 156, 255, 0.07), transparent 34%), var(--bg-elevated);
    box-shadow: 0 30px 100px -55px rgba(124, 156, 255, 0.7);
}

.brain-modal__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.5rem 1.5rem 1.15rem;
    border-bottom: 1px solid var(--border);
}

.brain-modal__header .section-label {
    margin: 0;
}

.brain-modal__header h2 {
    margin: 0.65rem 0 0;
    font-size: clamp(1.4rem, 4vw, 2rem);
}

.brain-modal__close {
    width: 2.2rem;
    height: 2.2rem;
    flex: 0 0 auto;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
}

.brain-modal__close:hover,
.brain-modal__close:focus-visible {
    border-color: var(--warm);
    color: var(--text);
}

.brain-modal__messages {
    min-height: 18rem;
    overflow-y: auto;
    padding: 1.25rem 1.5rem;
    scrollbar-color: var(--border-strong) transparent;
}

.brain-message {
    max-width: 86%;
    margin: 0 0 1rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    background: var(--surface);
}

.brain-message:last-child {
    margin-bottom: 0;
}

.brain-message--user {
    margin-left: auto;
    border-color: rgba(124, 156, 255, 0.35);
    background: var(--accent-soft);
}

.brain-message__role {
    display: block;
    color: var(--accent);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.1em;
}

.brain-message p {
    margin: 0.45rem 0 0;
    color: var(--text);
    font-size: 0.86rem;
    line-height: 1.75;
    white-space: pre-wrap;
}

.brain-modal__form {
    padding: 1rem 1.5rem 1.25rem;
    border-top: 1px solid var(--border);
}

.brain-modal__form textarea {
    display: block;
    width: 100%;
    min-height: 4.5rem;
    resize: vertical;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--border-strong);
    border-radius: 0;
    background: var(--surface);
    color: var(--text);
    caret-color: var(--accent);
    font: inherit;
    font-size: 0.86rem;
    line-height: 1.6;
}

.brain-modal__form textarea::placeholder {
    color: #8e9bb1;
    opacity: 1;
}

.brain-modal__form textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.brain-modal__form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.75rem;
}

.brain-modal__form-row small {
    color: #aeb9cc;
    font-size: 0.68rem;
    line-height: 1.5;
}

.brain-modal__form-row .button:disabled {
    cursor: wait;
    opacity: 0.55;
}

.brain-modal__status {
    min-height: 1.1rem;
    margin: 0.55rem 0 0;
    color: var(--warm);
    font-size: 0.72rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.contact {
    display: grid;
    grid-template-columns: minmax(0, 0.55fr) minmax(23rem, 0.45fr);
    gap: clamp(3rem, 8vw, 8rem);
    align-items: end;
}

.contact h2 {
    margin-top: 1.5rem;
}

.contact__actions {
    position: relative;
}

.contact-link {
    display: grid;
    grid-template-columns: 5rem 1fr auto;
    gap: 1rem;
    align-items: center;
    padding: 1.25rem 0;
    border-top: 1px solid var(--border);
    transition: color 160ms ease, padding 160ms ease;
}

.contact-link:hover {
    padding-right: 0.8rem;
    padding-left: 0.8rem;
    color: var(--accent);
}

.contact-link:last-of-type {
    border-bottom: 1px solid var(--border);
}

.contact-link span,
.copy-email {
    color: var(--muted);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.08em;
}

.contact-link strong {
    overflow-wrap: anywhere;
    font-size: 0.9rem;
    font-weight: 600;
}

.contact-link i,
.copy-email i {
    font-style: normal;
}

.copy-email {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    padding: 0.85rem 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    text-align: left;
}

.copy-email:hover {
    color: var(--text);
}

.copy-feedback {
    min-height: 1.4rem;
    margin: 0;
    color: var(--success);
    font-size: 0.72rem;
}

.site-footer {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    padding: 1.5rem var(--page-padding);
    border-top: 1px solid var(--border);
    color: rgba(232, 236, 244, 0.42);
    font-family: var(--utility);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.06em;
}

.site-footer p {
    margin: 0;
}

.site-footer a {
    color: rgba(232, 236, 244, 0.62);
}

.site-footer p:last-child {
    text-align: right;
}

.reveal {
    opacity: 1;
    transform: none;
}

.js .reveal {
    opacity: 0;
    transform: translateY(1.35rem);
    transition: opacity 680ms cubic-bezier(0.22, 1, 0.36, 1), transform 680ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

.hero .reveal:nth-child(2) {
    transition-delay: 70ms;
}

.hero .reveal:nth-child(3) {
    transition-delay: 130ms;
}

.hero .reveal:nth-child(4) {
    transition-delay: 200ms;
}

.hero .reveal:nth-child(5) {
    transition-delay: 260ms;
}

@keyframes availability {
    70%,
    100% {
        box-shadow: 0 0 0 0.75rem rgba(112, 214, 163, 0);
    }
}

@keyframes signal-travel {
    0%,
    8% {
        left: 0;
        opacity: 0;
    }

    12% {
        opacity: 1;
    }

    88% {
        opacity: 1;
    }

    92%,
    100% {
        left: calc(100% - 0.45rem);
        opacity: 0;
    }
}

@keyframes chart-scan {
    from {
        left: 28%;
    }

    to {
        left: 76%;
    }
}

.error-page {
    background: var(--bg);
}

.error-shell {
    position: relative;
    display: flex;
    min-height: 100svh;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(1.5rem, 4vw, 4rem);
    overflow: hidden;
}

.error-shell::before {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 24px 24px;
    content: "";
    mask-image: linear-gradient(to bottom, black, transparent 85%);
}

.error-shell__content,
.error-shell .identity,
.error-shell__footer {
    position: relative;
    z-index: 1;
}

.error-shell__content {
    max-width: 54rem;
    margin: 5rem 0;
}

.error-shell__number {
    position: absolute;
    z-index: -1;
    top: 50%;
    left: clamp(13rem, 30vw, 27rem);
    margin: 0;
    color: rgba(124, 156, 255, 0.07);
    font-family: var(--utility);
    font-size: clamp(13rem, 30vw, 32rem);
    font-weight: 700;
    letter-spacing: -0.12em;
    line-height: 0.7;
    transform: translateY(-50%);
}

.error-shell h1 {
    margin: 1.25rem 0 0;
    font-size: clamp(3.2rem, 8vw, 8rem);
    letter-spacing: -0.07em;
    line-height: 0.98;
}

.error-shell__content > p:not(.section-label, .error-shell__number) {
    margin: 2rem 0;
    color: var(--muted);
}

.error-shell__footer {
    margin: 0;
    color: var(--muted);
    font-family: var(--utility);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
}

@media (max-width: 1000px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 8rem;
    }

    .hero__copy {
        max-width: 50rem;
    }

    .signal-console {
        width: min(100%, 42rem);
    }

    .product-showcase {
        grid-template-columns: 1fr;
    }

    .product-copy {
        max-width: 46rem;
    }

    .product-workbench {
        border-top: 1px solid var(--border-strong);
        border-left: 0;
    }

    .capability-row {
        grid-template-columns: 8rem 1fr;
    }

    .capability-row > p:not(.capability-row__domain),
    .capability-row ul {
        grid-column: 2;
    }

    .capability-row ul {
        justify-content: flex-start;
    }

    .experience-layout,
    .notes,
    .contact {
        grid-template-columns: 1fr;
    }

    .profile-note,
    .notes__topics,
    .contact__actions {
        max-width: 42rem;
    }
}

@media (max-width: 760px) {
    .site-header {
        grid-template-columns: 1fr auto;
    }

    .site-nav {
        display: none;
    }

    .hero__title {
        max-width: 18ch;
        font-size: clamp(2.15rem, 9vw, 3rem);
    }

    .hero__facts {
        grid-template-columns: 1fr;
    }

    .hero__facts div {
        padding: 0.6rem 0;
    }

    .hero__facts div + div {
        padding-left: 0;
        border-top: 1px solid var(--border);
        border-left: 0;
    }

    .signal-console__viewport {
        min-height: 27rem;
        padding-right: 1rem;
        padding-left: 1rem;
    }

    .signal-path {
        right: 2.25rem;
        left: 2.25rem;
    }

    .signal-nodes small {
        display: none;
    }

    .signal-log p {
        display: block;
    }

    .signal-log span {
        display: block;
    }

    .technology-strip {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .section-heading {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .section-heading h2,
    .notes h2,
    .contact h2 {
        font-size: clamp(1.7rem, 7.5vw, 2.25rem);
    }

    .capability-row {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        padding: 1.55rem 0;
    }

    .product-source-row {
        grid-template-columns: 1fr 1fr;
    }

    .product-source-row > span:last-child {
        grid-column: 1 / -1;
    }

    .capability-row > p:not(.capability-row__domain),
    .capability-row ul {
        grid-column: 1;
    }

    .project {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project__body ul {
        display: grid;
    }

    .project__code {
        right: 24px;
        bottom: 20px;
        font-size: 3rem;
    }

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

    .project__body .project-domain-map,
    .project-evidence--four {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .project-flow li:nth-child(3) {
        border-left: 0;
    }

    .project-flow li:nth-child(n + 3) {
        border-top: 1px solid var(--border);
    }

    .project-domain-map li:nth-child(3),
    .project-evidence--four div:nth-child(3) {
        border-left: 0;
    }

    .project-domain-map li:nth-child(n + 3),
    .project-evidence--four div:nth-child(n + 3) {
        border-top: 1px solid var(--border);
    }

    .timeline__item {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .contact-link {
        grid-template-columns: 4rem 1fr auto;
    }

    .second-brain-entry {
        grid-template-columns: 1fr;
        align-items: start;
        gap: 1.35rem;
        padding: 1.15rem;
    }

    .second-brain-entry__topline {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .second-brain-entry__button {
        width: 100%;
        justify-self: stretch;
    }

    .brain-modal__panel {
        max-height: 94vh;
    }

    .brain-modal__header,
    .brain-modal__messages,
    .brain-modal__form {
        padding-right: 1rem;
        padding-left: 1rem;
    }

    .brain-message {
        max-width: 94%;
    }

    .brain-modal__form-row {
        align-items: flex-end;
    }

    .site-footer {
        grid-template-columns: 1fr;
        gap: 0.55rem;
        text-align: center;
    }

    .site-footer p:last-child {
        text-align: center;
    }
}

@media (max-width: 460px) {
    .identity__copy {
        display: none;
    }

    .header-link {
        padding: 0.55rem 0.7rem;
    }

    .hero {
        padding-top: 7.5rem;
    }

    .hero__actions .button {
        width: 100%;
    }

    .product-actions .button {
        width: 100%;
    }

    .project-flow,
    .project__body .project-domain-map,
    .project-evidence {
        grid-template-columns: 1fr;
    }

    .project-flow li + li,
    .project-flow li:nth-child(3),
    .project-domain-map li + li,
    .project-domain-map li:nth-child(3),
    .project-evidence div + div {
        border-top: 1px solid var(--border);
        border-left: 0;
    }

    .project-evidence div {
        min-height: auto;
    }

    .product-workbench__bar span:first-child {
        max-width: 12rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .product-source-row {
        grid-template-columns: 1fr;
    }

    .product-source-row > span:last-child {
        grid-column: auto;
    }

    .product-signal-row {
        display: grid;
    }

    .product-chart {
        height: 13.5rem;
    }

    .signal-console__bar span:first-child {
        max-width: 11rem;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .contact-link {
        grid-template-columns: 1fr auto;
    }

    .contact-link span {
        grid-column: 1 / -1;
    }

    .brain-modal__form-row {
        display: grid;
        grid-template-columns: 1fr auto;
    }

    .brain-modal__form-row small {
        grid-column: 1 / -1;
    }

    .project__code {
        right: 16px;
        bottom: 12px;
        font-size: 2.5rem;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ============ Architecture Atlas 产品卡片 ============ */
.atlas-card {
    display: grid;
    grid-template-columns: minmax(20rem, 42fr) minmax(0, 58fr);
    min-height: 580px;
    max-height: 640px;
    overflow: hidden;
    border: 1px solid rgba(112, 214, 163, 0.3);
    background: linear-gradient(135deg, rgba(112, 214, 163, 0.07), rgba(255, 255, 255, 0.015) 42%);
    box-shadow: 0 32px 110px -72px rgba(112, 214, 163, 0.75);
}

/* 左侧：产品信息 */
.atlas-card__info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: clamp(1.6rem, 3vw, 2.5rem);
    background: rgba(255, 255, 255, 0.02);
}

.atlas-card__head {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.atlas-card__mark {
    display: grid;
    width: 3.35rem;
    height: 3.35rem;
    place-items: center;
    flex: none;
    border: 1px solid rgba(112, 214, 163, 0.5);
    background:
        linear-gradient(135deg, rgba(112, 214, 163, 0.22), rgba(124, 156, 255, 0.08)),
        var(--bg-elevated);
    color: var(--text);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    box-shadow: inset 0 0 0 0.35rem rgba(10, 14, 23, 0.65);
}

.atlas-card__title {
    min-width: 0;
}

.atlas-card__title h3 {
    margin: 0;
    font-size: clamp(1.05rem, 1.6vw, 1.3rem);
    font-weight: 650;
    line-height: 1.35;
}

.atlas-card__tag {
    display: inline-block;
    margin-top: 0.3rem;
    color: var(--success);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.08em;
}

.atlas-card__lede {
    margin: 1.4rem 0 0;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.75;
}

/* 2 x 2 Feature Grid */
.atlas-card__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
    margin: 1.5rem 0 0;
    padding: 0;
    list-style: none;
}

.atlas-card__grid li {
    min-width: 0;
    padding: 0.75rem 0.8rem;
    border: 1px solid var(--border);
    background: var(--surface);
    transition: border-color 160ms ease, background-color 160ms ease;
}

.atlas-card__grid li:hover {
    border-color: rgba(112, 214, 163, 0.4);
    background: rgba(112, 214, 163, 0.05);
}

.atlas-card__grid strong {
    display: block;
    color: var(--text);
    font-size: 0.74rem;
    font-weight: 650;
    letter-spacing: 0.02em;
}

.atlas-card__grid span {
    display: block;
    margin-top: 0.3rem;
    color: var(--muted);
    font-size: 0.64rem;
    line-height: 1.5;
}

.atlas-card__cta {
    margin-top: auto;
    padding-top: 1.5rem;
}

.atlas-card__cta .button {
    text-decoration: none;
}

/* 右侧：Knowledge Graph Visual */
.atlas-card__graph {
    position: relative;
    min-width: 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 48%, rgba(124, 156, 255, 0.12), transparent 60%),
        rgba(4, 8, 15, 0.7);
}

.atlas-card__hud {
    position: absolute;
    top: 1rem;
    right: 1.1rem;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.42rem 0.7rem;
    border: 1px solid rgba(112, 214, 163, 0.24);
    background: rgba(10, 14, 23, 0.7);
    color: var(--success);
    font-size: var(--utility-micro-size);
    letter-spacing: 0.09em;
    white-space: nowrap;
}

.atlas-card__hud i {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: rgba(112, 214, 163, 0.5);
}

.atlas-card__canvas {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 3.4rem 1.2rem 1rem;
}

.atlas-card__canvas svg {
    display: block;
    width: 100%;
    height: 100%;
}

/* 扫描线 */
.atlas-card__canvas::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 3px,
        rgba(255, 255, 255, 0.015) 3px,
        rgba(255, 255, 255, 0.015) 4px
    );
}

/* 节点动画（hover 卡片时轻微活跃） */
.atlas-node {
    transform-box: fill-box;
    transform-origin: center;
}

.atlas-card:hover .atlas-node--core-glow {
    animation: atlasGlowPulse 3s ease-in-out infinite;
}

.atlas-card:hover .atlas-node--core {
    animation: atlasCorePulse 3s ease-in-out infinite;
}

.atlas-card:hover .atlas-node--orbit {
    animation: atlasOrbitPulse 3s ease-in-out infinite;
}

.atlas-card:hover .atlas-node--orbit:nth-of-type(odd) {
    animation-delay: 0.5s;
}

@keyframes atlasGlowPulse {
    0%, 100% { opacity: 0.75; }
    50% { opacity: 1; }
}

@keyframes atlasCorePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes atlasOrbitPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* 响应式：切换到上下布局 */
@media (max-width: 1000px) {
    .atlas-card {
        grid-template-columns: 1fr;
        min-height: 0;
        max-height: none;
    }

    .atlas-card__info {
        order: 1;
    }

    .atlas-card__graph {
        order: 2;
        min-height: 340px;
    }
}