html,
body {
    overflow-x: clip;
}

.transcirc-app {
    overflow: visible;
}

.project-navigation {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--tc-slate-200);
    background: var(--tc-blue-mist);
}

.project-navigation__inner {
    display: flex;
    min-height: 56px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.project-welcome,
.project-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--tc-slate-600) !important;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.project-welcome {
    color: var(--tc-slate-800) !important;
}

.project-welcome i {
    color: var(--tc-blue);
}

/* 版本标识：以胶囊标签形式紧贴站点名称右侧 */
.version-tag {
    display: inline-flex;
    align-items: center;
    margin-left: 12px;
    padding: 0.28em 0.85em;
    border: 1px solid rgba(0, 62, 128, 0.16);
    border-radius: 999px;
    color: #003e80;
    background: rgba(0, 62, 128, 0.07);
    font-size: 0.34em;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1;
    vertical-align: middle;
    white-space: nowrap;
}

.project-welcome .version-tag {
    margin-left: 4px;
    font-size: 0.72em;
}

.project-links {
    display: flex;
    align-items: stretch;
    align-self: stretch;
    gap: 4px;
}

.project-links a {
    position: relative;
    padding: 0 14px;
    transition: color 160ms ease-out, background-color 160ms ease-out;
}

.project-links a::after {
    position: absolute;
    right: 14px;
    bottom: 0;
    left: 14px;
    height: 2px;
    content: "";
    background: transparent;
}

.project-links a:hover {
    color: var(--tc-blue) !important;
    background: rgba(255, 255, 255, 0.75);
}

.project-links a:hover::after {
    background: var(--tc-blue);
}

.navigation-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--tc-slate-200);
    border-radius: 8px;
    color: var(--tc-slate-600);
    background: var(--tc-white);
}

.home-hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: 76px 0 64px;
    border-bottom: 1px solid #e8eef7;
    background-color: var(--tc-white);
    background-image: radial-gradient(at 0% 0%, #dbedff 0, transparent 50%), radial-gradient(at 50% 0%, #ebf1ff 0, transparent 50%), radial-gradient(at 100% 0%, #e0edff 0, transparent 50%);
}

.home-hero::before {
    content: "";
    position: absolute;
    width: min(42rem, 48rem);
    aspect-ratio: 1;
    right: -14rem;
    top: -22rem;
    z-index: -2;
    border: 1px solid rgba(20, 128, 110, 0.17);
    border-radius: 50%;
    box-shadow: 0 0 0 38px rgba(20, 128, 110, 0.025), 0 0 0 76px rgba(20, 128, 110, 0.025);
}

.home-hero__content {
    display: grid;
    justify-items: center;
    text-align: center;
}

.home-logo {
    width: min(100%, 356px);
    height: auto;
    margin-bottom: 28px;
}

.home-hero__eyebrow,
.section-heading__eyebrow {
    margin: 0 0 10px;
    color: var(--tc-blue);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    line-height: 16px;
    text-transform: uppercase;
}

.home-hero h1,
.section-heading h2,
.introduction-copy h2,
.reference-layout h2 {
    margin: 0;
    color: var(--tc-slate-900);
    font-weight: 700;
    letter-spacing: 0;
}

.home-hero h1 {
    font-size: 52px;
    line-height: 1.06;
}

.home-hero__summary {
    max-width: 610px;
    margin: 16px auto 32px;
    color: var(--tc-slate-600);
    font-size: 17px;
    line-height: 26px;
}

.search-panel {
    width: min(100%, 1000px);
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.82);
}

.search-panel__input {
    display: flex;
    min-width: 0;
    min-height: 60px;
    align-items: center;
    border: 1px solid var(--tc-slate-200);
    border-radius: 14px;
    background: var(--tc-white);
    transition: border-color 160ms ease-out, box-shadow 160ms ease-out;
}

.search-panel__input:focus-within {
    border-color: var(--tc-blue);
    box-shadow: 0 0 0 4px var(--tc-blue-soft);
}

.search-panel__input>i {
    font-size: 1.25rem;
    flex: 0 0 auto;
    margin: 0 16px 0 22px;
    color: var(--tc-slate-400);
}

/* 物种选择：只控制占位，外观由 SpeciesSelect 组件提供（无边框）。 */
.search-panel__species {
    max-width: 208px;
    height: 38px;
    flex: 0 0 auto;
    margin-right: 8px;
}

.search-panel__input input {
    min-width: 0;
    flex: 1;
    border: 0;
    outline: 0;
    color: var(--tc-slate-800);
    background: transparent;
    font-size: 18px;
}

.search-panel__input input::placeholder {
    color: var(--tc-slate-400);
}

/* 只作用于搜索按钮；物种下拉内部按钮不受影响。 */
.search-panel__input>button {
    align-self: stretch;
    flex: 0 0 auto;
    margin: -1px;
    padding: 0 28px;
    border: 1px solid var(--tc-blue);
    border-radius: 0 14px 14px 0;
    color: var(--tc-white);
    cursor: pointer;
    background: var(--tc-blue);
    font-size: 16px;
    font-weight: 700;
    transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.search-panel__input>button:hover {
    border-color: var(--tc-blue-dark);
    background: var(--tc-blue-dark);
}

.search-panel__input>button i {
    margin-left: 8px;
}

.search-panel__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 12px 2px;
    color: var(--tc-slate-500);
    font-size: 13px;
}

.sequence-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
}

.quick-searches {
    display: grid;
    width: min(100%, 1000px);
    padding: 0 11px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 5px;
    text-align: left;
}

.quick-searches .search-item {
    display: grid;
    grid-template-columns: minmax(116px, 0.66fr) 1.34fr;
    align-items: center;
    gap: 10px;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid rgba(226, 232, 240, 0.92);
    border-radius: 10px;
    color: var(--tc-slate-600);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--tc-shadow-card);
    font-size: 12px;
    text-decoration: none;
    transition: border-color 160ms ease-out, background-color 160ms ease-out;
}

.quick-searches .search-item__examples {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}



.quick-searches a {
    text-decoration: none;
}

.quick-searches a:hover {
    border-color: #93c5fd;
    background: var(--tc-white);
}

.quick-searches span {
    color: var(--tc-slate-500);
    font-weight: 600;
}

.quick-searches code {
    min-width: 0;
    overflow: hidden;
    color: var(--tc-blue);
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
    font-size: 12px;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.species-band {
    padding: 48px 0 44px;
    border-bottom: 1px solid var(--tc-slate-200);
    background: var(--tc-white);
}

.species-band__eyebrow,
.species-band__title {
    text-align: center;
}

.species-band__title {
    margin: 0 0 26px;
    color: var(--tc-slate-900);
    font-size: 22px;
    font-weight: 700;
    line-height: 30px;
}

.species-band__list {
    display: grid;
    grid-template-columns: repeat(10, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.species-band__list li {
    display: grid;
    min-width: 0;
    justify-items: center;
    gap: 8px;
    padding: 14px 6px 12px;
    border: 1px solid var(--tc-slate-200);
    border-radius: 12px;
    color: var(--tc-slate-600);
    background: var(--tc-white);
    box-shadow: var(--tc-shadow-card);
    font-size: 12px;
    font-weight: 600;
    line-height: 16px;
    transition: transform 160ms ease-out, border-color 160ms ease-out, background-color 160ms ease-out;
}

@media (hover: hover) {
    .species-band__list li:hover {
        transform: translateY(-3px);
        border-color: #93c5fd;
        background: var(--tc-blue-mist);
    }
}

/* 图标本体不含颜色，统一通过 color 填充（currentColor）。 */
.species-icon {
    display: block;
    width: 30px;
    height: 30px;
    color: var(--tc-blue);
}

.tc-section {
    padding: 80px 0;
}

.scroll-reveal.is-reveal-ready {
    opacity: 0;
    transform: translateY(16px);
}

.scroll-reveal.is-visible {
    animation: section-reveal 560ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes section-reveal {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

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

.back-to-top {
    position: fixed;
    z-index: 50;
    right: 28px;
    bottom: 28px;
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 1px solid var(--tc-slate-200);
    border-radius: 50%;
    opacity: 0;
    color: var(--tc-white);
    background: var(--tc-blue);
    box-shadow: var(--tc-shadow-elevated);
    visibility: hidden;
    cursor: pointer;
    transform: translateY(8px);
    transition: opacity 180ms ease-out, transform 180ms ease-out, visibility 180ms;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--tc-blue-dark);
}

.back-to-top:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.28);
    outline-offset: 3px;
}

.statistics-section {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: var(--tc-slate-50);
}

.statistics-section::before,
.statistics-section::after {
    position: absolute;
    z-index: -1;
    border: 1px solid rgba(37, 99, 235, 0.09);
    border-radius: 50%;
    content: "";
    pointer-events: none;
}

.statistics-section::before {
    top: -300px;
    left: -150px;
    width: 660px;
    height: 660px;
    box-shadow: 0 0 0 34px rgba(37, 99, 235, 0.035), 0 0 0 68px rgba(37, 99, 235, 0.022), 0 0 0 102px rgba(37, 99, 235, 0.014);
}

.statistics-section::after {
    bottom: -290px;
    right: -170px;
    width: 520px;
    height: 520px;
    border-color: rgba(15, 23, 42, 0.06);
}

.statistics-section>.tc-container {
    position: relative;
    z-index: 1;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 32px;
}

.section-heading h2,
.introduction-copy h2,
.reference-layout h2 {
    font-size: 30px;
    line-height: 36px;
}

.section-heading>p {
    margin: 0;
    color: var(--tc-slate-600);
    font-size: 15px;
    line-height: 24px;
    text-align: right;
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.stat-card {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 160px;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    border: 1px solid var(--tc-slate-200);
    border-radius: 16px;
    background: var(--tc-white);
    box-shadow: var(--tc-shadow-card);
    transition: transform 160ms ease-out, border-color 160ms ease-out, box-shadow 160ms ease-out;
}

@media (hover: hover) {
    .stat-card:hover {
        transform: translateY(-3px);
        border-color: #93c5fd;
        box-shadow: 0 8px 18px rgba(15, 23, 42, 0.09);
    }
}

.stat-card--total {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    border-color: var(--tc-blue);
    color: var(--tc-white);
    background: var(--tc-blue);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.24);
}

.stat-card--total:hover {
    border-color: var(--tc-blue-dark);
    box-shadow: 0 10px 18px -3px rgba(37, 99, 235, 0.3);
}

.stat-card--total>i {
    align-self: center;
    color: #bfdbfe;
    font-size: 34px;
    margin-top: 15px;
}

.stat-card--total .stat-card__label {
    color: #dbeafe;
}

.stat-card--total .stat-card__number {
    color: var(--tc-white);
    font-size: 48px;
}

.stat-card--m6a,
.stat-card--ires,
.stat-card--tis {
    grid-column: span 1;
}

.stat-card--rpp,
.stat-card--orf,
.stat-card--peptide,
.stat-card--ms {
    grid-column: span 1;
}

.stat-card__number {
    margin: 0 0 8px;
    color: var(--tc-slate-900);
    font-size: 30px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0;
    line-height: 1;
}

.stat-card__label {
    margin: 0;
    color: var(--tc-slate-600);
    font-size: 14px;
    font-weight: 700;
    line-height: 20px;
}

.evidence-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 4px 8px;
    border-radius: 999px;
    color: var(--tc-slate-500);
    background: var(--tc-slate-100);
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.evidence-help {
    position: absolute;
    top: 16px;
    right: 16px;
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: var(--tc-slate-500);
    background: transparent;
    cursor: pointer;
}

.evidence-help:hover {
    color: var(--tc-blue);
    background: var(--tc-blue-mist);
}

.introduction-section {
    background: var(--tc-white);
}

.introduction-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
    align-items: center;
    gap: 40px;
}

.introduction-copy>p:not(.section-heading__eyebrow) {
    margin: 15px 0 0;
    color: var(--tc-slate-600);
    font-size: 14px;
    line-height: 24px;
}

.reference-citation {
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.rna-figure {
    margin: 0;
    padding: 28px;
    border: 1px solid var(--tc-slate-200);
    border-radius: 16px;
    background: var(--tc-white);
    box-shadow: var(--tc-shadow-elevated);
}

.rna-figure__image {
    display: grid;
    min-height: 320px;
    place-items: center;
    padding: 20px;
    border-radius: 12px;
    background: var(--tc-slate-50);
}

.rna-figure img {
    display: block;
    width: min(100%, 360px);
    height: auto;
}

.rna-figure figcaption {
    margin-top: 18px;
    color: var(--tc-slate-500);
    font-size: 13px;
    line-height: 20px;
    text-align: center;
}

.reference-section {
    padding-top: 64px;
    background: var(--tc-slate-50);
}

.reference-layout {
    display: grid;
    grid-template-columns: minmax(180px, 0.35fr) minmax(0, 1fr);
    gap: 32px 64px;
}

.citation-text {
    margin: 0;
    padding: 24px;
    border: 1px solid var(--tc-slate-200);
    border-radius: 16px;
    color: var(--tc-slate-600);
    background: var(--tc-white);
    box-shadow: var(--tc-shadow-card);
    font-size: 15px;
    line-height: 24px;
}

.citation-text>span {
    color: var(--tc-slate-500);
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
    font-size: 13px;
    font-weight: 700;
}

.reference-details {
    grid-column: 2;
    padding: 16px 24px;
    border-top: 1px solid var(--tc-slate-200);
    color: var(--tc-slate-600);
}

.reference-details summary {
    width: fit-content;
    color: var(--tc-blue);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.reference-details ol {
    display: grid;
    gap: 12px;
    margin: 20px 0 8px;
    padding-left: 24px;
    font-size: 14px;
    line-height: 22px;
}

.evidence-dialog {
    width: min(100% - 32px, 680px);
    max-height: min(100% - 48px, 620px);
    padding: 0;
    overflow: auto;
    border: 1px solid var(--tc-slate-200);
    border-radius: 16px;
    box-shadow: var(--tc-shadow-elevated);
}

.evidence-dialog::backdrop {
    background: rgba(15, 23, 42, 0.48);
}

.evidence-dialog[open] {
    animation: dialog-enter 200ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.evidence-dialog[open]::backdrop {
    animation: dialog-backdrop-enter 180ms ease-out both;
}

@keyframes dialog-enter {
    from {
        opacity: 0;
        transform: translateY(8px) scale(0.985);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes dialog-backdrop-enter {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.evidence-dialog__header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
    padding: 24px 24px 0;
}

.evidence-dialog h2 {
    margin: 0;
    color: var(--tc-slate-900);
    font-size: 20px;
    font-weight: 700;
    line-height: 28px;
}

.evidence-dialog p {
    margin: 18px 24px 24px;
    color: var(--tc-slate-600);
    font-size: 15px;
    line-height: 24px;
}

.reference-dialog__list {
    display: grid;
    gap: 14px;
    margin: 20px 24px 24px;
    padding-left: 24px;
    color: var(--tc-slate-600);
    font-size: 14px;
    line-height: 22px;
}

.dialog-close {
    display: grid;
    width: 36px;
    height: 36px;
    flex: 0 0 auto;
    place-items: center;
    border: 0;
    border-radius: 8px;
    color: var(--tc-slate-600);
    background: var(--tc-slate-100);
    cursor: pointer;
}

.dialog-close:hover {
    color: var(--tc-slate-900);
    background: var(--tc-slate-200);
}

@media (max-width: 1023px) {
    .home-hero {
        padding-top: 64px;
    }

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

    .stat-card--m6a,
    .stat-card--ires,
    .stat-card--tis,
    .stat-card--rpp,
    .stat-card--orf,
    .stat-card--peptide,
    .stat-card--ms {
        grid-column: span 1;
    }

    .introduction-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 40px;
    }

    .rna-figure {
        max-width: 620px;
    }

    .species-band__list {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

@media (max-width: 639px) {
    .project-navigation__inner {
        position: relative;
        min-height: 60px;
        gap: 12px;
    }

    .project-welcome {
        font-size: 13px;
    }

    .navigation-toggle {
        display: grid;
        flex: 0 0 auto;
        place-items: center;
    }

    .project-links {
        position: absolute;
        z-index: 5;
        top: calc(100% - 1px);
        right: 0;
        left: 0;
        display: none;
        align-self: auto;
        flex-direction: column;
        gap: 0;
        padding: 8px;
        border: 1px solid var(--tc-slate-200);
        border-radius: 0 0 12px 12px;
        background: var(--tc-white);
        box-shadow: var(--tc-shadow-elevated);
    }

    .project-links.is-open {
        display: flex;
    }

    .project-links a {
        min-height: 44px;
        padding: 0 14px;
    }

    .project-links a::after {
        display: none;
    }

    .home-hero {
        padding: 48px 0;
    }

    .home-logo {
        width: min(100%, 280px);
        margin-bottom: 22px;
    }

    .home-hero h1 {
        font-size: 40px;
        line-height: 44px;
    }

    .home-hero__summary {
        margin: 14px auto 26px;
        font-size: 16px;
        line-height: 24px;
    }

    .search-panel {
        padding: 8px;
        border-radius: 16px;
    }

    .search-panel__input {
        min-height: 0;
        flex-wrap: wrap;
        border-radius: 12px;
    }

    .search-panel__input>i {
        margin: 0 12px 0 16px;
    }

    /* 窄屏时物种选择独占一行，排在搜索框上方。 */
    .search-panel__species {
        order: -1;
        max-width: none;
        height: 44px;
        flex: 1 1 100%;
        margin: 6px 6px 0;
    }

    .search-panel__input input {
        min-width: calc(100% - 54px);
        height: 56px;
        font-size: 16px;
    }

    .search-panel__input>button {
        width: 100%;
        height: 52px;
        margin: 0;
        border-radius: 10px;
    }

    .search-panel__footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
        padding: 12px 8px 4px;
    }

    .quick-searches {
        grid-template-columns: minmax(0, 1fr);
    }

    .quick-searches a {
        grid-template-columns: minmax(105px, 0.8fr) minmax(0, 1.2fr);
    }

    .tc-section {
        padding: 48px 0;
    }

    .species-band {
        padding: 36px 0 32px;
    }

    .species-band__title {
        margin-bottom: 20px;
        font-size: 19px;
        line-height: 26px;
    }

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

    .back-to-top {
        right: 18px;
        bottom: 18px;
        width: 44px;
        height: 44px;
    }

    .section-heading {
        display: block;
        margin-bottom: 24px;
    }

    .section-heading h2,
    .introduction-copy h2,
    .reference-layout h2 {
        font-size: 26px;
        line-height: 32px;
    }

    .section-heading>p {
        margin-top: 14px;
        font-size: 15px;
        text-align: left;
    }

    .statistics-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .stat-card {
        min-height: 160px;
        padding: 20px;
    }

    .stat-card--total {
        min-height: 160px;
    }

    .stat-card--total .stat-card__number {
        font-size: 42px;
    }

    .evidence-badge {
        top: 16px;
        left: 16px;
    }

    .evidence-help {
        top: 12px;
        right: 12px;
    }

    .introduction-copy>p:not(.section-heading__eyebrow) {
        margin-top: 16px;
        font-size: 16px;
        line-height: 25px;
    }

    .rna-figure {
        padding: 16px;
    }

    .rna-figure__image {
        min-height: 230px;
        padding: 12px;
    }

    .reference-section {
        padding-top: 48px;
        padding-bottom: 140px;
    }

    .reference-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 20px;
    }

    .citation-text {
        padding: 20px;
    }

    .reference-details {
        grid-column: 1;
        padding: 16px 0;
    }
}

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

    .transcirc-app,
    .transcirc-app * {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .scroll-reveal,
    .scroll-reveal.is-reveal-ready,
    .scroll-reveal.is-visible {
        opacity: 1 !important;
        animation: none !important;
        transform: none !important;
    }

    .evidence-dialog[open],
    .evidence-dialog[open]::backdrop {
        animation: none !important;
    }
}