:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-alt: #eef4ff;
    --text: #172033;
    --muted: #5d6880;
    --line: #dbe3f2;
    --primary: #315efb;
    --primary-deep: #1737a6;
    --accent: #16a085;
    --shadow: 0 18px 50px rgba(24, 51, 120, 0.12);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
}

a {
    color: inherit;
}

button {
    font: inherit;
}

.container {
    width: min(calc(100% - 32px), var(--container));
    margin: 0 auto;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 72px 0 48px;
    background:
        radial-gradient(circle at top right, rgba(111, 168, 255, 0.32), transparent 28%),
        linear-gradient(135deg, #09152f 0%, #102557 42%, #19398f 100%);
    color: #fff;
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto -8% -100px auto;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.07);
    filter: blur(4px);
}

.hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 420px);
    gap: 28px;
    align-items: stretch;
}

.eyebrow,
.section-tag,
.detail-card__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.eyebrow {
    background: rgba(255, 255, 255, 0.12);
    color: #dce8ff;
}

.hero h1 {
    margin: 18px 0 16px;
    font-size: clamp(2rem, 4vw, 3.6rem);
    line-height: 1.15;
}

.hero__lead {
    max-width: 720px;
    margin: 0;
    color: rgba(255, 255, 255, 0.88);
    font-size: 1.05rem;
}

.hero__meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    margin-top: 16px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.95rem;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.button--primary {
    background: #fff;
    color: var(--primary-deep);
    box-shadow: 0 12px 30px rgba(6, 16, 44, 0.22);
}

.button--ghost {
    border-color: rgba(255, 255, 255, 0.26);
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}

.button--small {
    min-height: 38px;
    padding: 0 16px;
}

.hero__meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    list-style: none;
    padding: 0;
    margin: 32px 0 0;
}

.hero__meta li {
    padding: 16px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
}

.hero__meta strong {
    display: block;
    margin-bottom: 6px;
    font-size: 1.6rem;
}

.hero__meta span {
    color: rgba(255, 255, 255, 0.84);
    font-size: 0.95rem;
}

.hero__panel {
    display: grid;
    gap: 16px;
}

.panel-card {
    padding: 24px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
}

.panel-card--accent {
    background: linear-gradient(180deg, rgba(22, 160, 133, 0.28), rgba(22, 160, 133, 0.12));
}

.panel-card h2 {
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.panel-card p,
.panel-card li {
    margin: 0;
    color: rgba(255, 255, 255, 0.88);
}

.panel-card ul {
    padding-left: 20px;
    margin: 0;
}

.panel-card li + li {
    margin-top: 8px;
}

.section {
    padding: 76px 0;
}

.section--light {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(239, 244, 255, 0.86));
}

.section-heading {
    max-width: 760px;
    margin-bottom: 30px;
}

.section-heading--inline {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 20px;
    max-width: none;
}

.section-tag {
    background: var(--surface-alt);
    color: var(--primary-deep);
}

.section-heading h2 {
    margin: 12px 0 10px;
    font-size: clamp(1.7rem, 3vw, 2.4rem);
    line-height: 1.2;
}

.section-heading p {
    margin: 0;
    color: var(--muted);
}

.overview-grid,
.submission-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.overview-card,
.submission-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: 0 8px 26px rgba(16, 33, 78, 0.05);
}

.overview-card h3,
.submission-card h3 {
    margin: 0 0 10px;
    font-size: 1.1rem;
}

.overview-card p,
.submission-card p {
    margin: 0;
    color: var(--muted);
}

.timeline {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.timeline__item {
    position: relative;
    padding: 24px;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(16, 33, 78, 0.06);
}

.timeline__index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary), #6a8bff);
    color: #fff;
    font-weight: 700;
}

.timeline__item h3 {
    margin: 0 0 10px;
}

.timeline__item p {
    margin: 0;
    color: var(--muted);
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.filter-chip {
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-chip:hover,
.filter-chip.is-active {
    border-color: rgba(49, 94, 251, 0.35);
    background: rgba(49, 94, 251, 0.08);
    color: var(--primary-deep);
}

.experiment-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.experiment-card {
    display: flex;
    gap: 14px;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(16, 33, 78, 0.06);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.experiment-card.is-live {
    cursor: pointer;
}

.experiment-card.is-disabled {
    cursor: default;
    opacity: 0.9;
}

.experiment-card.is-live:hover,
.experiment-card.is-active {
    transform: translateY(-3px);
    border-color: rgba(49, 94, 251, 0.38);
    box-shadow: var(--shadow);
}

.experiment-card.is-hidden,
.detail-card.is-hidden {
    display: none;
}

.experiment-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 48px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--surface-alt);
    font-size: 1.4rem;
}

.experiment-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}

.experiment-card__serial {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 28px;
    margin-bottom: 12px;
    padding: 0 10px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), #6a8bff);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    box-shadow: 0 8px 20px rgba(49, 94, 251, 0.2);
}

.experiment-card h3 {
    margin: 0 0 8px;
    font-size: 1.1rem;
}

.experiment-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.96rem;
}

.tag,
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.tag {
    background: rgba(49, 94, 251, 0.1);
    color: var(--primary-deep);
}

.tag--soft {
    background: rgba(22, 160, 133, 0.12);
    color: var(--accent);
}

.details-stack {
    display: grid;
    gap: 22px;
}

.detail-card {
    padding: 26px;
    border-radius: var(--radius-xl);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: 0 12px 34px rgba(16, 33, 78, 0.07);
    scroll-margin-top: 28px;
}

.detail-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 22px;
}

.detail-card__eyebrow {
    background: var(--surface-alt);
    color: var(--primary-deep);
    margin-bottom: 10px;
}

.detail-card h3 {
    margin: 0;
    font-size: 1.45rem;
}

.status-badge {
    background: rgba(255, 183, 77, 0.16);
    color: #9a5d00;
    white-space: nowrap;
}

.status-badge--live {
    background: rgba(22, 160, 133, 0.14);
    color: var(--accent);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.info-block {
    padding: 20px;
    border-radius: var(--radius-md);
    background: #fbfcff;
    border: 1px solid var(--line);
}

.info-block--wide {
    grid-column: span 2;
}

.info-block h4 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.info-block p,
.info-block li {
    margin: 0;
    color: var(--muted);
}

.detail-entry-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-deep);
    font-weight: 700;
}

.detail-entry-link:hover {
    text-decoration: underline;
}

.info-block ul,
.info-block ol {
    margin: 0;
    padding-left: 20px;
}

.info-block li + li {
    margin-top: 8px;
}

.site-footer {
    padding: 28px 0 42px;
    background: #0c1733;
    color: rgba(255, 255, 255, 0.82);
}

.site-footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.site-footer strong {
    display: inline-block;
    margin-bottom: 6px;
    color: #fff;
}

.site-footer p {
    margin: 0;
}

.site-footer__meta {
    margin-top: 8px !important;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.92rem;
}

@media (max-width: 1080px) {
    .hero__inner,
    .experiment-grid,
    .timeline,
    .overview-grid,
    .submission-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading--inline,
    .detail-card__header,
    .site-footer__inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .filter-group {
        justify-content: flex-start;
    }
}

@media (max-width: 720px) {
    .hero {
        padding-top: 56px;
    }

    .hero__inner,
    .experiment-grid,
    .timeline,
    .overview-grid,
    .submission-grid,
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .hero__meta-info {
        flex-direction: column;
        gap: 6px;
    }

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

    .info-block--wide {
        grid-column: span 1;
    }

    .section {
        padding: 60px 0;
    }
}