:root {
    --font-body: 'Meiryo', 'メイリオ', 'BIZ UDPGothic', 'BIZ UDP ゴシック', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'MS PGothic', sans-serif;
    --font-heading: 'Meiryo', 'メイリオ', 'BIZ UDPGothic', 'BIZ UDP ゴシック', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'MS PGothic', sans-serif;
    --font-mono: 'Consolas', 'SFMono-Regular', Menlo, Monaco, 'Courier New', monospace;

    --color-bg: #eaecf0;
    --color-surface: #ffffff;
    --color-surface-alt: #f8f9fa;
    --color-surface-soft: #f3f6fa;
    --color-text: #202122;
    --color-text-secondary: #3a3d40;
    --color-text-muted: #54595d;
    --color-border: #c8ccd1;
    --color-border-strong: #a2a9b1;
    --color-accent: #3366cc;
    --color-accent-strong: #2a4b8d;
    --color-accent-soft: #eaf3ff;
    --color-success-bg: #f0fff4;
    --color-success-border: #93c6a5;
    --color-warning-bg: #fff9ea;
    --color-warning-border: #e1b53b;

    --shadow-soft: 0 2px 8px rgba(32, 33, 34, 0.06);

    --max-width: 1260px;
    --content-width: 860px;
    --header-height: 62px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.82;
    color: var(--color-text);
    background:
        linear-gradient(180deg, #f8f9fa 0%, #eaecf0 420px, #edf1f6 100%),
        repeating-linear-gradient(
            0deg,
            rgba(162, 169, 177, 0.08),
            rgba(162, 169, 177, 0.08) 1px,
            transparent 1px,
            transparent 28px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(162, 169, 177, 0.08),
            rgba(162, 169, 177, 0.08) 1px,
            transparent 1px,
            transparent 28px
        );
    background-blend-mode: normal, multiply, multiply;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(51, 102, 204, 0.2);
}

img,
svg,
video {
    max-width: 100%;
    height: auto;
}

strong {
    color: var(--color-text);
    font-weight: 700;
}

code,
pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

code {
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.12em 0.42em;
}

pre {
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-border-strong);
    border-radius: 4px;
    overflow-x: auto;
    padding: 16px;
    margin: 22px 0;
}

/* Header */
.journal-header {
    position: sticky;
    top: 0;
    z-index: 1200;
    min-height: var(--header-height);
    padding: 0 clamp(14px, 3vw, 40px);
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 1px solid var(--color-border-strong);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9), 0 1px 6px rgba(32, 33, 34, 0.08);

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

.site-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.site-title:hover {
    color: var(--color-accent-strong);
    text-decoration: none;
}

.journal-header nav {
    display: flex;
    align-items: stretch;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.journal-header nav a {
    display: inline-flex;
    align-items: center;
    min-height: calc(var(--header-height) - 14px);
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 6px 6px 0 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.journal-header nav a:hover {
    color: var(--color-accent-strong);
    border-color: var(--color-border);
    background: var(--color-surface-alt);
    text-decoration: none;
}

/* Article Header */
.article-header {
    max-width: var(--max-width);
    margin: 22px auto 0;
    padding: 32px 30px 24px;
    border: 1px solid var(--color-border);
    border-bottom: none;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.article-type {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    margin-bottom: 14px;
    border: 1px solid #8db6ff;
    border-radius: 999px;
    background: var(--color-accent-soft);
    color: var(--color-accent-strong);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.article-title {
    font-family: var(--font-heading);
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.28;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.article-subtitle {
    max-width: 90ch;
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 18px;
}

.author-info {
    font-size: 14px;
    color: var(--color-text-muted);
}

.article-meta {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--color-border-strong);
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* Easy Guide */
.easy-guide {
    max-width: var(--max-width);
    margin: 16px auto 0;
    padding: 0 24px;
}

.easy-guide-inner {
    background: #fff7e6;
    border: 1px solid #e6c77a;
    border-left: 5px solid #d29b0d;
    padding: 16px 18px;
    box-shadow: var(--shadow-soft);
}

.easy-guide h2 {
    margin: 0 0 6px;
    font-size: 18px;
    line-height: 1.5;
}

.easy-guide p {
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.easy-guide ul {
    margin: 0 0 8px 20px;
}

.easy-guide li {
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.easy-guide-more {
    margin: 0;
}

/* Main Layout */
.main-container {
    max-width: var(--max-width);
    margin: 0 auto 42px;
    padding: 0 24px 44px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 312px;
    gap: 28px;
    align-items: start;
}

.article-header + .main-container {
    margin-top: 0;
}

.content-column {
    min-width: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
    padding: 34px 34px 44px;
}

.article-header + .main-container .content-column {
    border-top: none;
}

.sidebar-column {
    min-width: 0;
    position: sticky;
    top: calc(var(--header-height) + 16px);
    max-height: calc(100vh - var(--header-height) - 24px);
    overflow-y: auto;
    padding-right: 3px;
}

/* Typography */
.content-column p,
.content-column li,
.papers-page main p,
.papers-page main li {
    color: var(--color-text-secondary);
}

p {
    margin-bottom: 18px;
}

ul,
ol {
    margin: 0 0 22px 24px;
}

li {
    margin-bottom: 8px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text);
}

h2.section-title {
    margin: 46px 0 22px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-border);
    font-family: var(--font-heading);
    font-size: clamp(24px, 2.8vw, 34px);
    line-height: 1.36;
    font-weight: 700;
}

h3 {
    margin: 28px 0 10px;
    font-family: var(--font-heading);
    font-size: 25px;
    line-height: 1.4;
}

h4 {
    margin: 20px 0 10px;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.5;
}

h5 {
    margin: 16px 0 8px;
    font-size: 15px;
    font-weight: 700;
}

a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-color: rgba(51, 102, 204, 0.45);
    text-underline-offset: 2px;
    transition: color 0.18s ease, text-decoration-color 0.18s ease;
}

a:hover {
    color: var(--color-accent-strong);
    text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Utility Boxes */
.abstract-box {
    margin-bottom: 36px;
    padding: 20px 22px;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
    background: var(--color-accent-soft);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.abstract-box h2 {
    margin: 0 0 8px;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-accent-strong);
}

.abstract-box p:last-child {
    margin-bottom: 0;
}

.sidebar-box,
.key-points {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    padding: 18px;
    margin-bottom: 16px;
}

.key-points {
    border-left: 4px solid var(--color-border-strong);
}

.sidebar-box h4,
.key-points h4 {
    margin: 0 0 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
}

.key-points ul,
.sidebar-box ul {
    margin: 0;
    list-style: none;
}

.key-points li,
.sidebar-box li {
    margin: 0;
    padding: 10px 0;
    border-bottom: 1px dashed var(--color-border);
}

.key-points li:last-child,
.sidebar-box li:last-child {
    border-bottom: none;
}

.tag-list {
    margin-top: 10px;
}

.tag {
    display: inline-flex;
    align-items: center;
    margin: 0 6px 6px 0;
    padding: 4px 9px;
    border: 1px solid var(--color-border-strong);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: var(--color-surface);
}

.tag:hover {
    color: var(--color-accent-strong);
    border-color: var(--color-accent);
}

/* Figure and Visual Blocks */
.figure-box,
.visual-diagram {
    margin: 30px 0;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.figure-content {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 26px;
    display: flex;
    justify-content: center;
}

.figure-label {
    padding: 12px 16px 0;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.figure-caption,
.diagram-caption {
    padding: 8px 16px 16px;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 0;
}

.visual-diagram {
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: stretch;
}

.diagram-side {
    flex: 1;
    text-align: center;
}

.diagram-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.diagram-divider {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-muted);
    font-weight: 700;
    font-size: 13px;
}

.arrow-box {
    position: relative;
    max-width: 160px;
    margin: 8px auto;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
}

.arrow-box::after {
    content: '↓';
    display: block;
    margin-top: 7px;
    color: var(--color-text-muted);
    font-weight: 400;
}

.arrow-box.active {
    background: var(--color-accent-soft);
    border-color: #93b8ff;
    color: var(--color-accent-strong);
}

/* Timeline */
.timeline-visual {
    width: 100%;
    display: flex;
    justify-content: space-between;
    gap: 14px;
    position: relative;
    padding-top: 18px;
}

.timeline-visual::before {
    content: '';
    position: absolute;
    left: 42px;
    right: 42px;
    top: 24px;
    height: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    width: 25%;
    z-index: 1;
    text-align: center;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    margin: 0 auto 10px;
    border-radius: 50%;
    border: 2px solid var(--color-border-strong);
    background: var(--color-surface);
}

.timeline-dot.done {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.timeline-dot.current {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(51, 102, 204, 0.15);
}

.timeline-label {
    background: var(--color-surface-alt);
    display: inline-block;
    padding: 4px 8px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--color-text-muted);
}

.timeline-label strong {
    display: block;
    margin-top: 2px;
    font-size: 13px;
}

/* Flow Visual */
.flow-visual {
    width: 100%;
    display: flex;
    gap: 14px;
}

.flow-step {
    flex: 1;
    position: relative;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    padding: 14px;
}

.flow-step::after {
    content: '';
    position: absolute;
    right: -13px;
    top: 50%;
    width: 26px;
    height: 2px;
    background: var(--color-border-strong);
}

.flow-step:last-child::after {
    display: none;
}

.flow-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent-strong);
}

.flow-sub {
    margin-top: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Stage List */
.stage-list {
    position: relative;
    margin: 24px 0;
}

.stage-list::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 14px;
    bottom: 14px;
    width: 2px;
    background: var(--color-border);
}

.stage-item {
    position: relative;
    margin-bottom: 22px;
    padding-left: 56px;
}

.stage-item:last-child {
    margin-bottom: 0;
}

.stage-list {
    counter-reset: stage-counter;
}

.stage-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid #8db6ff;
    background: var(--color-surface);
    color: var(--color-accent-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 0 0 6px var(--color-surface);
}

.stage-number:empty::after {
    counter-increment: stage-counter;
    content: counter(stage-counter);
}

.stage-body h4 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 20px;
}

.stage-body p {
    margin-bottom: 10px;
}

/* Alert Boxes */
.note-box,
.question-box,
.resolution-box {
    margin: 20px 0;
    padding: 16px 18px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.note-box {
    background: var(--color-warning-bg);
    border-left: 4px solid var(--color-warning-border);
}

.question-box {
    border-left: 4px solid #7ca6e8;
    background: #f4f8ff;
}

.resolution-box {
    border-left: 4px solid var(--color-success-border);
    background: var(--color-success-bg);
}

.resolution-box h5 {
    color: #2f6d45;
}

.resolution-box p {
    color: #2f6d45;
}

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    border: 1px solid var(--color-border-strong);
    table-layout: auto;
}

.data-table th,
.data-table td {
    border: 1px solid var(--color-border);
    padding: 10px 12px;
    vertical-align: top;
    text-align: left;
    font-size: 14px;
}

.data-table th {
    background: #eaecf0;
    font-weight: 700;
    color: var(--color-text);
}

.data-table tr:nth-child(even) td {
    background: #fbfcfe;
}

/* References */
.references {
    margin-top: 56px;
    padding-top: 26px;
    border-top: 1px solid var(--color-border);
}

.references ol {
    margin-left: 22px;
}

.references li {
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* CTA and Actions */
.cta-box {
    margin: 30px 0;
    padding: 22px;
    border: 1px solid #99bbff;
    border-left: 5px solid var(--color-accent);
    background: var(--color-accent-soft);
}

.cta-box h4 {
    margin-top: 0;
    color: var(--color-accent-strong);
    font-family: var(--font-heading);
    font-size: 24px;
}

.cta-box p {
    color: var(--color-text-secondary);
}

.cta-box a {
    display: inline-flex;
    align-items: center;
    margin-top: 6px;
    padding: 8px 14px;
    border: 1px solid var(--color-accent);
    background: #fff;
    border-radius: 3px;
    color: var(--color-accent-strong);
    font-weight: 700;
    text-decoration: none;
}

.cta-box a:hover {
    background: #f6f9ff;
    text-decoration: none;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    margin-top: 4px;
    border: 1px solid var(--color-border-strong);
    border-radius: 3px;
    background: var(--color-surface);
    color: var(--color-accent-strong);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-decoration: none;
}

.btn-action:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
    text-decoration: none;
}

.icon {
    width: 14px;
    height: 14px;
}

/* Footer */
footer {
    margin-top: 30px;
    padding: 34px 20px 44px;
    border-top: 1px solid var(--color-border-strong);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(234, 236, 240, 0.85));
    text-align: center;
}

footer p {
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.site-policy {
    max-width: 88ch;
    margin-left: auto;
    margin-right: auto;
}

/* Papers Page */
.papers-page {
    max-width: var(--max-width);
    margin: 22px auto 40px;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 286px minmax(0, 1fr);
    gap: 22px;
}

.papers-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 14px);
    align-self: start;
    max-height: calc(100vh - var(--header-height) - 24px);
    overflow-y: auto;
    padding: 16px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.sidebar-logo {
    margin-bottom: 18px;
    font-family: var(--font-heading);
    font-size: 24px;
    line-height: 1.2;
}

.sidebar-nav-header {
    margin-bottom: 8px;
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-nav,
.sub-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-nav li {
    margin-bottom: 8px;
}

.sidebar-nav a {
    display: block;
    padding: 6px 8px;
    border-radius: 3px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
}

.sidebar-nav a:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent-strong);
}

.sub-nav {
    margin-top: 6px;
    margin-left: 10px;
    padding-left: 10px;
    border-left: 1px solid var(--color-border);
}

.sub-nav a {
    font-size: 13px;
}

.papers-page > main {
    min-width: 0;
    padding: 28px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.papers-page > main > header {
    margin-bottom: 26px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-border);
}

.papers-page > main > header h1 {
    margin: 0 0 8px;
    font-family: var(--font-heading);
    font-size: clamp(26px, 3vw, 40px);
    line-height: 1.3;
}

.papers-page > main > header p {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

.stats-grid {
    margin: 18px 0 0;
    padding: 14px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
}

.stat-card {
    text-align: center;
    padding: 8px 6px;
}

.stat-card span {
    display: block;
    margin-bottom: 4px;
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.stat-card div {
    color: var(--color-accent-strong);
    font-size: 26px;
    line-height: 1.2;
    font-weight: 700;
}

.category-title {
    margin: 34px 0 14px;
    font-family: var(--font-heading);
    font-size: clamp(24px, 2.5vw, 34px);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 8px;
}

.year-title,
.year-heading {
    margin: 26px 0 14px;
    font-family: var(--font-heading);
    font-size: 30px;
    line-height: 1.3;
    color: var(--color-text);
}

.papers-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.papers-count {
    text-align: right;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.paper-card,
.paper-entry {
    margin-bottom: 16px;
    padding: 18px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.paper-card:last-child,
.paper-entry:last-child {
    margin-bottom: 0;
}

.paper-card > h3,
.paper-title {
    margin: 12px 0 10px;
    font-family: var(--font-heading);
    font-size: clamp(21px, 2vw, 28px);
    line-height: 1.42;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border: 1px solid var(--color-border-strong);
    border-radius: 999px;
    background: #fff;
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.meta,
.paper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 12px;
    color: var(--color-text-muted);
    font-size: 12px;
}

.meta-item,
.paper-meta > * {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: #fff;
}

.paper-abstract {
    margin-top: 12px;
    padding: 14px;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-border-strong);
    background: #fff;
    font-size: 14px;
}

.translation-container {
    margin-top: 14px;
    border: 1px solid var(--color-border);
    background: #fff;
}

.jp-title {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface-soft);
    font-size: 14px;
    font-weight: 700;
}

.jp-summary {
    padding: 12px;
    font-size: 14px;
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.grid-5points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 10px;
    padding: 12px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.point-card {
    border: 1px solid var(--color-border);
    background: #fff;
    padding: 10px;
}

.point-card label {
    display: block;
    margin-bottom: 6px;
    color: var(--color-accent-strong);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.point-card p {
    margin: 0;
    font-size: 13px;
    line-height: 1.7;
}

.raw-abstract {
    margin-top: 14px;
    padding: 12px;
    border: 1px dashed var(--color-border-strong);
    background: #fff;
    color: var(--color-text-muted);
    font-size: 13px;
    font-style: italic;
}

/* Responsive */
@media (max-width: 1140px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .sidebar-column {
        position: static;
        max-height: none;
        overflow: visible;
    }

    .papers-page {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .papers-sidebar {
        position: static;
        max-height: none;
    }
}

@media (max-width: 860px) {
    .journal-header {
        min-height: auto;
        padding-top: 8px;
        padding-bottom: 8px;
        flex-direction: column;
        align-items: flex-start;
    }

    .journal-header nav {
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
        flex-wrap: nowrap;
        justify-content: flex-start;
        padding-bottom: 2px;
    }

    .journal-header nav a {
        min-height: 38px;
    }

    .article-header {
        margin-top: 14px;
        padding: 24px 18px 16px;
    }

    .main-container,
    .papers-page,
    .easy-guide {
        padding-left: 14px;
        padding-right: 14px;
    }

    .content-column,
    .papers-page > main {
        padding: 20px 18px 26px;
    }

    h2.section-title {
        margin-top: 34px;
    }

    .visual-diagram,
    .flow-visual {
        flex-direction: column;
    }

    .flow-step::after,
    .arrow-box::after {
        display: none;
    }

    .timeline-visual {
        flex-direction: column;
        gap: 14px;
        padding-left: 20px;
        padding-top: 0;
    }

    .timeline-visual::before {
        left: 6px;
        right: auto;
        top: 8px;
        bottom: 8px;
        width: 2px;
        height: auto;
    }

    .timeline-item {
        width: 100%;
        text-align: left;
        display: flex;
        align-items: flex-start;
        gap: 10px;
    }

    .timeline-dot {
        margin: 2px 0 0;
    }

    .timeline-label {
        padding: 0;
        background: transparent;
    }

    .timeline-label strong {
        display: inline;
        margin-left: 6px;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    .site-title {
        font-size: 18px;
    }

    .article-subtitle {
        font-size: 16px;
    }

    .stage-item {
        padding-left: 50px;
    }

    .stage-number {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }

    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .meta,
    .paper-meta {
        gap: 6px;
    }

    .meta-item,
    .paper-meta > * {
        width: 100%;
        border-radius: 4px;
    }
}