:root {
    --jsnu-red: #a61c00;
    --jsnu-red-dark: #8a1700;
    --jsnu-gold: #c59d5f;
    --jsnu-gold-soft: #f3eadb;
    --page-bg: #fcfbf9;
    --text-dark: #2c3e50;
    --text-muted: #666;
    --line: rgba(166, 28, 0, 0.14);
    --panel: rgba(255, 255, 255, 0.94);
    --panel-strong: #fff;
    --soft-red: rgba(166, 28, 0, 0.055);
    --card-shadow: 0 10px 30px rgba(166, 28, 0, 0.08);
}

* {
    box-sizing: border-box;
}

body.corpus-page {
    margin: 0;
    min-height: 100vh;
    font-family: "PingFang SC", "Microsoft YaHei", "Heiti SC", Arial, sans-serif;
    background-color: var(--page-bg);
    background-image: radial-gradient(#e6e1d8 1px, transparent 1px);
    background-size: 20px 20px;
    color: var(--text-dark);
}

a {
    color: var(--jsnu-red);
    text-decoration: none;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
}

a:hover {
    color: var(--jsnu-red-dark);
    text-decoration: underline;
}

.corpus-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 3px solid var(--jsnu-red);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.corpus-header-inner {
    width: min(1200px, 94vw);
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.corpus-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.corpus-brand img {
    height: 42px;
    width: auto;
    flex: 0 0 auto;
}

.corpus-title {
    display: block;
    color: var(--jsnu-red);
    font-size: 18px;
    font-weight: 700;
    line-height: 1.2;
}

.corpus-subtitle {
    display: block;
    margin-top: 3px;
    color: #888;
    font-size: 12px;
    letter-spacing: .2px;
    text-transform: uppercase;
}

.corpus-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.corpus-nav a,
.nav-pill,
.language-switch a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 14px;
    border: 1px solid rgba(166, 28, 0, 0.18);
    border-radius: 999px;
    background: #fff;
    color: var(--jsnu-red);
    font-size: 14px;
    font-weight: 600;
}

.corpus-nav a:hover,
.nav-pill:hover,
.language-switch a:hover,
.language-switch a.active {
    background: var(--jsnu-red);
    color: #fff;
    text-decoration: none;
}

.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.language-switch script {
    display: none;
}

.corpus-main {
    width: min(1180px, 94vw);
    margin: 30px auto 46px;
}

.corpus-hero,
.panel,
.summary,
.tool {
    background: var(--panel);
    border: 1px solid var(--line);
    border-top: 4px solid var(--jsnu-red);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
}

.corpus-hero {
    padding: 26px 30px;
    margin-bottom: 22px;
}

.panel,
.summary,
.tool {
    padding: 22px;
    margin-bottom: 20px;
}

h1,
h2,
h3 {
    color: #333;
    letter-spacing: 0;
}

h1 {
    margin: 0 0 10px;
    font-size: clamp(26px, 4vw, 38px);
    font-family: "Noto Serif SC", "SimSun", serif;
}

h2 {
    margin: 0 0 14px;
    font-size: 20px;
}

p {
    line-height: 1.7;
}

.meta,
.status,
.empty,
.muted {
    color: var(--text-muted);
}

.badge,
.feature,
.meta-tag {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 4px 10px;
    border: 1px solid rgba(197, 157, 95, 0.46);
    border-radius: 999px;
    background: var(--jsnu-gold-soft);
    color: #7b520f;
    font-size: 12px;
    font-weight: 700;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    font-size: 13px;
}

th,
td {
    border: 1px solid var(--line);
    padding: 9px 10px;
    vertical-align: top;
}

th {
    background: linear-gradient(180deg, #f5eadc, #efe2cf);
    color: #4b3427;
    text-align: left;
}

tbody tr:nth-child(even) {
    background: #fffaf5;
}

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
}

input,
select,
textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fff;
    color: var(--text-dark);
    font: inherit;
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid rgba(197, 157, 95, 0.28);
    border-color: var(--jsnu-gold);
}

button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    border: 1px solid var(--jsnu-red);
    border-radius: 999px;
    background: var(--jsnu-red);
    color: #fff;
    padding: 9px 18px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(166, 28, 0, 0.18);
}

button:hover,
.button:hover {
    background: var(--jsnu-red-dark);
    color: #fff;
    text-decoration: none;
}

.tools,
.grid,
.forms {
    display: grid;
    gap: 20px;
}

.tools {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.tool {
    display: block;
    color: inherit;
    min-height: 170px;
}

.tool:hover {
    border-color: var(--jsnu-gold);
    text-decoration: none;
    transform: translateY(-2px);
}

.disabled {
    opacity: .55;
    pointer-events: none;
}

.error {
    color: #8b1a1a;
    background: #fff0f0;
    border: 1px solid #e1b4b4;
    border-radius: 6px;
    padding: 12px;
}

.empty {
    background: var(--soft-red);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 14px;
}

.table-wrap,
.freq-wrap {
    width: 100%;
    overflow: auto;
}

.panel-heading-actions,
.help-dialog-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.panel-heading-actions {
    margin-bottom: 14px;
    flex-wrap: nowrap;
}

.panel-heading-actions h2,
.help-dialog-head h2 {
    margin: 0;
}

.panel-heading-actions h2 {
    min-width: 0;
}

.panel-heading-actions button,
.help-dialog-head button {
    margin: 0;
}

.panel-heading-actions > button {
    flex: 0 0 auto;
    padding: 7px 11px;
    border: 1px solid rgba(181, 31, 8, .28);
    border-radius: 999px;
    background: var(--soft-red);
    color: var(--jsnu-red);
    box-shadow: none;
    white-space: nowrap;
    font-size: 12px;
    line-height: 1.2;
}

.panel-heading-actions > button:hover {
    border-color: var(--jsnu-red);
    background: #fff;
    color: var(--jsnu-red);
    box-shadow: 0 3px 10px rgba(181, 31, 8, .12);
    transform: none;
}

@media (max-width: 420px) {
    .panel-heading-actions {
        align-items: flex-start;
        flex-wrap: wrap;
    }
}

.help-dialog {
    width: min(640px, calc(100vw - 32px));
    border: 1px solid var(--line);
    border-top: 4px solid var(--jsnu-red);
    border-radius: 10px;
    padding: 0;
    color: var(--text);
    background: #fff;
    box-shadow: 0 22px 60px rgba(32, 20, 16, .24);
}

.help-dialog::backdrop {
    background: rgba(32, 20, 16, .45);
}

.help-dialog-content {
    display: grid;
    gap: 12px;
    padding: 22px;
}

.help-dialog-content p {
    margin: 0;
    line-height: 1.65;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    flex-wrap: wrap;
    width: fit-content;
    max-width: 100%;
    margin: 18px auto 0;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 250, 247, .96);
    box-shadow: 0 6px 18px rgba(166, 28, 0, .06);
}

.page-link,
.page-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 6px 11px;
    border: 1px solid transparent;
    border-radius: 999px;
    background: transparent;
    color: var(--jsnu-red);
    font-size: 13px;
    font-weight: 700;
}

.page-link:hover,
.page-link.active {
    background: var(--jsnu-red);
    border-color: var(--jsnu-red);
    color: #fff;
    text-decoration: none;
}

.page-link.disabled {
    color: #aaa;
    background: transparent;
    opacity: .62;
    cursor: default;
    pointer-events: none;
}

.page-status {
    border-color: var(--line);
    background: #fff;
    color: var(--text-muted);
    font-weight: 600;
}

.pagination .page-jump {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-left: 3px;
    padding-left: 8px;
    border-left: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
}

.pagination .page-jump label {
    display: inline;
    margin: 0;
    white-space: nowrap;
}

.pagination .page-jump input {
    width: 54px !important;
    height: 32px;
    min-height: 32px;
    margin: 0;
    padding: 5px 6px;
    border-radius: 999px;
    text-align: center;
    appearance: textfield;
}

.pagination .page-jump input::-webkit-inner-spin-button,
.pagination .page-jump input::-webkit-outer-spin-button {
    margin: 0;
    appearance: none;
}

.pagination .page-jump button {
    align-self: center;
    height: 32px;
    min-height: 32px;
    margin: 0;
    padding: 0 12px;
    line-height: 1;
    box-shadow: none;
    transform: translateY(-1px);
}

@media (max-width: 860px) {
    .corpus-header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 14px 0;
    }

    .corpus-nav {
        justify-content: flex-start;
    }

    .tools,
    .grid,
    .forms {
        grid-template-columns: 1fr;
    }

    .panel,
    .summary,
    .tool,
    .corpus-hero {
        padding: 18px;
    }

    .pagination {
        width: 100%;
        border-radius: 14px;
    }

    .pagination .page-status {
        order: -1;
        width: 100%;
    }

    .pagination .page-jump {
        margin-left: 0;
        padding-left: 0;
        border-left: 0;
    }
}