:root {
    --bg: #f6f3ed;
    --surface: #ffffff;
    --ink: #171821;
    --muted: #6c6d78;
    --line: #e8e3da;
    --brand: #ff4d4f;
    --brand-dark: #da2e36;
    --lime: #d8ff59;
    --dark: #11131a;
    --radius: 22px;
    --shadow: 0 18px 50px rgba(24, 21, 17, 0.1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}

img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
}

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

button {
    font: inherit;
}

.wrap,
.header-inner,
.hero-inner,
.footer-inner {
    width: min(1200px, calc(100% - 40px));
    margin-right: auto;
    margin-left: auto;
}

.site-header {
    position: sticky;
    z-index: 50;
    top: 0;
    border-bottom: 1px solid rgba(23, 24, 33, 0.08);
    background: rgba(246, 243, 237, 0.92);
    backdrop-filter: blur(18px);
}

.header-inner {
    display: flex;
    align-items: center;
    min-height: 82px;
    gap: 28px;
}

.brand,
.footer-brand {
    display: flex;
    align-items: center;
    gap: 11px;
}

.brand-mark {
    display: grid;
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 14px 14px 14px 4px;
    background: var(--brand);
    color: #fff;
    font-size: 21px;
    font-weight: 900;
    box-shadow: 0 8px 20px rgba(255, 77, 79, 0.25);
}

.brand-copy {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-copy strong {
    font-size: 18px;
    white-space: nowrap;
}

.brand-copy small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 9px;
    letter-spacing: 0.12em;
}

.main-nav {
    display: flex;
    flex: 1;
    justify-content: flex-end;
    gap: 4px;
}

.main-nav a {
    display: flex;
    align-items: center;
    padding: 9px 10px;
    border-radius: 12px;
    color: #51525d;
    font-size: 14px;
    font-weight: 700;
    gap: 5px;
    transition: 0.2s ease;
}

.main-nav a:hover,
.main-nav a.is-active {
    background: var(--dark);
    color: #fff;
    transform: translateY(-1px);
}

.nav-icon {
    color: var(--brand);
    font-size: 13px;
}

.main-nav a.is-active .nav-icon {
    color: var(--lime);
}

.menu-toggle {
    display: none;
    margin-left: auto;
    padding: 10px;
    border: 0;
    background: transparent;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px 0;
    background: var(--ink);
}

.hero {
    position: relative;
    margin-top: 34px;
    overflow: hidden;
}

.hero-inner {
    display: grid;
    min-height: 620px;
    align-items: center;
    padding: 72px 60px;
    border-radius: 34px;
    background: var(--dark);
    color: #fff;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 64px;
}

.hero-copy,
.hero-visual {
    position: relative;
    z-index: 2;
}

.hero-badge,
.eyebrow {
    display: inline-flex;
    align-items: center;
    color: var(--brand);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.hero-badge {
    padding: 7px 13px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    color: var(--lime);
}

.hero h1 {
    margin: 18px 0 16px;
    font-size: clamp(56px, 7vw, 94px);
    line-height: 1.03;
    letter-spacing: -0.07em;
}

.hero h1 a {
    display: inline-block;
}

.hero-lead {
    max-width: 650px;
    margin: 0;
    color: #c9cad2;
    font-size: 18px;
}

.hero-actions,
.app-actions {
    display: flex;
    align-items: center;
    margin-top: 32px;
    gap: 14px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    padding: 0 22px;
    border: 0;
    border-radius: 999px;
    font-weight: 800;
    cursor: pointer;
    transition: 0.2s ease;
}

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

.btn-primary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 10px 24px rgba(255, 77, 79, 0.28);
}

.btn-secondary {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
}

.hero .btn-secondary {
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.btn-dark {
    background: var(--dark);
    color: #fff;
}

.hero-metrics {
    display: flex;
    margin-top: 42px;
    gap: 32px;
}

.hero-metrics div {
    display: flex;
    flex-direction: column;
}

.hero-metrics strong {
    color: var(--lime);
    font-size: 24px;
}

.hero-metrics span {
    color: #8e909b;
    font-size: 12px;
}

.hero-card {
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 28px;
    background: #22252f;
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.4);
    transform: rotate(2deg);
}

.hero-card img {
    aspect-ratio: 4 / 3;
}

.hero-card-caption {
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.hero-card-caption span {
    color: var(--brand);
    font-size: 12px;
}

.floating-tag {
    position: absolute;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--lime);
    color: var(--dark);
    font-size: 13px;
    font-weight: 900;
    box-shadow: var(--shadow);
}

.tag-one {
    top: -18px;
    right: -10px;
}

.tag-two {
    bottom: 38px;
    left: -28px;
    background: var(--brand);
    color: #fff;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
}

.hero-glow-one {
    top: -120px;
    left: 25%;
    width: 360px;
    height: 360px;
    background: #ff4249;
}

.hero-glow-two {
    right: 4%;
    bottom: -180px;
    width: 380px;
    height: 380px;
    background: #5150e7;
}

.news-strip {
    display: flex;
    align-items: center;
    min-height: 68px;
    margin-top: 24px;
    padding: 14px 22px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    gap: 10px;
}

.live-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 0 0 0 6px rgba(255, 77, 79, 0.12);
}

.news-marquee {
    display: flex;
    flex: 1;
    justify-content: space-around;
    color: var(--muted);
    gap: 24px;
}

.section {
    margin-top: 110px;
    margin-bottom: 110px;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 38px;
}

.section-heading h2,
.split-copy h2,
.mosaic-copy h2,
.about-section h2,
.app-section h2 {
    margin: 8px 0 12px;
    font-size: clamp(34px, 4vw, 52px);
    line-height: 1.16;
    letter-spacing: -0.04em;
}

.section-heading p,
.split-copy > p,
.mosaic-copy p,
.about-section p,
.app-section p {
    color: var(--muted);
    font-size: 17px;
}

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

.category-card {
    position: relative;
    min-height: 255px;
    padding: 26px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    transition: 0.25s ease;
}

.category-card::after {
    position: absolute;
    right: -30px;
    bottom: -30px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--accent);
    content: "";
    opacity: 0.12;
}

.category-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow);
    transform: translateY(-6px);
}

.category-icon,
.channel-icon {
    display: grid;
    width: 54px;
    height: 54px;
    place-items: center;
    border-radius: 17px;
    background: color-mix(in srgb, var(--accent) 15%, white);
    color: var(--accent);
    font-size: 25px;
}

.category-card h3 {
    margin: 20px 0 8px;
    font-size: 21px;
}

.category-card p {
    min-height: 72px;
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 14px;
}

.text-link {
    color: var(--brand-dark);
    font-weight: 900;
}

.section-dark {
    padding: 110px 0;
    background: var(--dark);
    color: #fff;
}

.section-dark .section-heading p {
    color: #a6a8b2;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.feature-card {
    overflow: hidden;
    border: 1px solid #30333e;
    border-radius: var(--radius);
    background: #1a1d25;
}

.feature-card-large {
    grid-row: span 2;
}

.feature-card img {
    aspect-ratio: 16 / 10;
    transition: transform 0.4s ease;
}

.feature-card-large img {
    aspect-ratio: 4 / 5;
}

.feature-card:hover img,
.article-card:hover img {
    transform: scale(1.04);
}

.image-link {
    display: block;
    overflow: hidden;
}

.feature-content {
    padding: 22px;
}

.feature-content h3 {
    margin: 12px 0 8px;
    font-size: 20px;
    line-height: 1.45;
}

.feature-content p {
    margin: 0;
    color: #a6a8b2;
}

.pill {
    display: inline-flex;
    padding: 5px 10px;
    border-radius: 999px;
    background: rgba(255, 77, 79, 0.12);
    color: var(--brand);
    font-size: 12px;
    font-weight: 900;
}

.split-feature {
    display: grid;
    align-items: center;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 70px;
}

.split-image img {
    aspect-ratio: 4 / 5;
    border-radius: 120px 24px 120px 24px;
    box-shadow: var(--shadow);
}

.check-list {
    display: grid;
    margin: 28px 0;
    padding: 0;
    list-style: none;
    gap: 15px;
}

.check-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.check-list li > span {
    display: grid;
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 50%;
    background: var(--lime);
    font-weight: 900;
}

.check-list p {
    margin: 2px 0 0;
    color: var(--muted);
}

.ranking-list {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
}

.ranking-row {
    display: grid;
    align-items: center;
    min-height: 88px;
    padding: 0 24px;
    border-bottom: 1px solid var(--line);
    grid-template-columns: 58px 100px 1fr 150px 32px;
    gap: 14px;
}

.ranking-row:last-child {
    border-bottom: 0;
}

.rank-number {
    color: var(--brand);
    font-size: 24px;
    font-weight: 900;
}

.rank-label {
    color: var(--muted);
    font-size: 13px;
}

.heat-bar {
    height: 6px;
    overflow: hidden;
    border-radius: 999px;
    background: #f0ede7;
}

.heat-bar i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--brand), #ffb547);
}

.tone-section {
    padding: 100px 0;
    background: #ece6dc;
}

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

.timeline-item {
    position: relative;
    padding: 28px;
    border-radius: var(--radius);
    background: #fff;
}

.timeline-dot {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 50%;
    background: var(--dark);
    color: var(--lime);
    font-weight: 900;
}

.timeline-item time {
    display: block;
    margin-top: 24px;
    color: var(--brand);
    font-weight: 900;
}

.timeline-item h3 {
    margin: 6px 0;
}

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

.topic-wall {
    display: grid;
    align-items: center;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
}

.topic-cloud {
    display: flex;
    min-height: 380px;
    align-content: center;
    align-items: center;
    justify-content: center;
    padding: 36px;
    border-radius: 34px;
    background: var(--dark);
    flex-wrap: wrap;
    gap: 12px;
}

.topic-cloud span {
    padding: 9px 16px;
    border: 1px solid #353844;
    border-radius: 999px;
    color: #c6c8d1;
}

.topic-cloud .topic-xl {
    background: var(--brand);
    color: #fff;
    font-size: 24px;
}

.topic-cloud .topic-lg {
    color: var(--lime);
    font-size: 19px;
}

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

.standard-card {
    padding: 26px;
    border-top: 4px solid var(--brand);
    border-radius: 0 0 var(--radius) var(--radius);
    background: #fff;
}

.standard-card > span {
    color: #c9c3ba;
    font-size: 34px;
    font-weight: 900;
}

.standard-card h3 {
    margin: 18px 0 8px;
}

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

.mosaic {
    display: grid;
    align-items: center;
    grid-template-columns: 0.7fr 1.3fr;
    gap: 50px;
}

.mosaic-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    grid-template-rows: repeat(2, 180px);
    gap: 14px;
}

.mosaic-grid img {
    height: 100%;
    border-radius: 22px;
}

.mosaic-grid img:first-child {
    grid-row: span 2;
}

.about-section {
    padding: 110px 0;
    background: #ffefe8;
}

.about-grid {
    display: grid;
    align-items: center;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 70px;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.about-values div {
    display: flex;
    min-height: 150px;
    flex-direction: column;
    justify-content: center;
    padding: 24px;
    border-radius: var(--radius);
    background: #fff;
}

.about-values strong {
    color: var(--brand);
    font-size: 28px;
}

.about-values span {
    color: var(--muted);
}

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

.faq-list details {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.faq-list summary {
    font-size: 20px;
    font-weight: 900;
    cursor: pointer;
}

.faq-list p {
    max-width: 840px;
    margin-bottom: 0;
    color: var(--muted);
}

.app-section {
    display: grid;
    align-items: center;
    padding: 64px;
    border-radius: 34px;
    background: var(--dark);
    color: #fff;
    grid-template-columns: 1fr 300px;
    gap: 60px;
}

.app-section p {
    color: #a9abb6;
}

.app-actions > span {
    color: #8e909b;
    font-size: 13px;
}

.qr-card {
    padding: 20px;
    border-radius: 24px;
    background: #fff;
    color: var(--ink);
    text-align: center;
}

.qr-pattern {
    display: grid;
    aspect-ratio: 1;
    margin-bottom: 14px;
    place-items: center;
    border: 14px solid var(--ink);
    background: repeating-linear-gradient(45deg, #171821 0 8px, #fff 8px 16px);
}

.qr-pattern span {
    display: grid;
    width: 76px;
    height: 76px;
    place-items: center;
    border-radius: 18px;
    background: var(--brand);
    color: #fff;
    font-size: 34px;
    font-weight: 900;
}

.qr-card strong,
.qr-card small {
    display: block;
}

.site-footer {
    margin-top: 110px;
    padding: 54px 0;
    background: #0d0f15;
    color: #fff;
}

.footer-inner {
    display: grid;
    align-items: center;
    grid-template-columns: 1fr auto;
    gap: 24px;
}

.footer-brand p {
    margin: 2px 0 0;
    color: #8e909b;
    font-size: 13px;
}

.footer-links {
    display: flex;
    color: #b6b8c1;
    gap: 22px;
}

.copyright {
    grid-column: 1 / -1;
    margin: 20px 0 0;
    padding-top: 20px;
    border-top: 1px solid #292c35;
    color: #6f717c;
    font-size: 12px;
}

.channel-hero {
    margin-top: 34px;
}

.channel-hero > .wrap {
    padding: 54px 58px;
    border-radius: 30px;
    background: var(--dark);
    color: #fff;
}

.breadcrumb {
    display: flex;
    margin-bottom: 34px;
    color: #8e909b;
    font-size: 13px;
    gap: 10px;
    flex-wrap: wrap;
}

.breadcrumb a:hover {
    color: var(--brand);
}

.channel-title-row {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.channel-title-row h1 {
    margin: 0 0 10px;
    font-size: clamp(42px, 6vw, 72px);
    line-height: 1;
}

.channel-title-row p {
    max-width: 850px;
    margin: 0;
    color: #b0b2bc;
}

.channel-intro {
    max-width: 700px;
    margin-bottom: 34px;
}

.channel-intro h2 {
    margin: 8px 0;
    font-size: 38px;
}

.channel-intro p {
    color: var(--muted);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.article-card {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
}

.article-card-wide {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: 1.1fr 0.9fr;
}

.article-card img {
    aspect-ratio: 16 / 9;
    transition: transform 0.35s ease;
}

.article-card-wide img {
    height: 100%;
    aspect-ratio: auto;
}

.article-card-body {
    padding: 28px;
}

.meta-line {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 12px;
}

.article-card h2 {
    margin: 12px 0 10px;
    font-size: 24px;
    line-height: 1.4;
}

.article-card p {
    color: var(--muted);
}

.channel-note {
    display: flex;
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    gap: 20px;
}

.note-icon {
    display: grid;
    flex: 0 0 auto;
    width: 46px;
    height: 46px;
    place-items: center;
    border-radius: 50%;
    background: var(--lime);
    font-weight: 900;
}

.channel-note h2,
.channel-note p {
    margin: 0;
}

.channel-note p {
    color: var(--muted);
}

.article-shell {
    margin-top: 34px;
}

.story {
    max-width: 900px;
    margin: 0 auto;
}

.story-header {
    padding: 50px 0 36px;
    text-align: center;
}

.story-header h1 {
    margin: 16px 0;
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.22;
    letter-spacing: -0.04em;
}

.story-dek {
    max-width: 700px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 19px;
}

.story-meta {
    display: flex;
    justify-content: center;
    margin-top: 24px;
    color: #8b8c94;
    font-size: 13px;
    gap: 16px;
    flex-wrap: wrap;
}

.reading-note {
    display: flex;
    margin-bottom: 30px;
    padding: 20px 24px;
    border-left: 4px solid var(--brand);
    border-radius: 0 16px 16px 0;
    background: #fff;
    gap: 18px;
}

.reading-note strong {
    flex: 0 0 auto;
}

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

.story-figure {
    margin: 36px 0;
}

.story-figure img,
.story-gallery img {
    aspect-ratio: 16 / 10;
    border-radius: var(--radius);
}

.story-figure-hero img {
    aspect-ratio: 16 / 9;
}

figcaption {
    margin-top: 9px;
    color: #8b8c94;
    font-size: 12px;
    text-align: center;
}

.story-content {
    max-width: 760px;
    margin: 0 auto;
}

.story-content p,
.story-content li {
    font-size: 17px;
}

.lead-paragraph::first-letter {
    float: left;
    margin: 8px 8px 0 0;
    color: var(--brand);
    font-size: 56px;
    font-weight: 900;
    line-height: 0.75;
}

.story-content h2 {
    margin: 52px 0 16px;
    font-size: 28px;
}

.story-content h3 {
    margin-top: 42px;
    font-size: 22px;
}

.story-gallery {
    display: grid;
    margin: 36px -70px;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.story-gallery figure {
    margin: 0;
}

blockquote {
    margin: 36px 0;
    padding: 28px;
    border-radius: var(--radius);
    background: var(--dark);
    color: #fff;
}

blockquote p {
    margin: 0;
}

.story-end {
    margin-top: 50px;
    padding: 34px;
    border-radius: var(--radius);
    background: #ffefe8;
    text-align: center;
}

.story-end > span {
    display: grid;
    width: 44px;
    height: 44px;
    margin: 0 auto 12px;
    place-items: center;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
}

.story-end p {
    margin-bottom: 0;
    color: var(--muted);
}

.story-actions {
    display: flex;
    justify-content: center;
    margin: 40px 0;
    gap: 14px;
}

.story-pagination {
    display: grid;
    padding-top: 30px;
    border-top: 1px solid var(--line);
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.story-pagination a,
.pagination-empty {
    display: flex;
    min-height: 110px;
    flex-direction: column;
    justify-content: center;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.story-pagination span {
    color: var(--muted);
    font-size: 12px;
}

.toast {
    position: fixed;
    z-index: 100;
    right: 24px;
    bottom: 24px;
    padding: 14px 20px;
    border-radius: 14px;
    background: var(--dark);
    color: #fff;
    box-shadow: var(--shadow);
}

@media (max-width: 1080px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: 82px;
        right: 20px;
        left: 20px;
        display: none;
        padding: 16px;
        border: 1px solid var(--line);
        border-radius: 18px;
        background: #fff;
        box-shadow: var(--shadow);
        grid-template-columns: repeat(2, 1fr);
    }

    .main-nav.is-open {
        display: grid;
    }

    .hero-inner {
        padding: 60px 42px;
        grid-template-columns: 1fr 0.8fr;
        gap: 38px;
    }

    .category-grid,
    .standards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 760px) {
    .wrap,
    .header-inner,
    .hero-inner,
    .footer-inner {
        width: min(100% - 28px, 1200px);
    }

    .header-inner {
        min-height: 70px;
    }

    .brand-mark {
        width: 40px;
        height: 40px;
    }

    .main-nav {
        top: 70px;
        right: 14px;
        left: 14px;
    }

    .hero,
    .channel-hero,
    .article-shell {
        margin-top: 20px;
    }

    .hero-inner {
        min-height: auto;
        padding: 46px 24px;
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 53px;
    }

    .hero-visual {
        margin: 18px 8px 0;
    }

    .tag-two {
        left: -8px;
    }

    .hero-metrics {
        justify-content: space-between;
        gap: 12px;
    }

    .news-strip {
        align-items: flex-start;
    }

    .news-marquee {
        flex-direction: column;
        gap: 4px;
    }

    .section {
        margin-top: 76px;
        margin-bottom: 76px;
    }

    .section-dark,
    .about-section,
    .tone-section {
        padding: 76px 0;
    }

    .category-grid,
    .feature-grid,
    .timeline,
    .standards-grid,
    .about-values,
    .article-grid,
    .story-pagination {
        grid-template-columns: 1fr;
    }

    .feature-card-large {
        grid-row: auto;
    }

    .feature-card-large img {
        aspect-ratio: 16 / 10;
    }

    .split-feature,
    .topic-wall,
    .mosaic,
    .about-grid,
    .app-section {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .split-image img {
        max-height: 520px;
    }

    .ranking-row {
        padding: 18px;
        grid-template-columns: 44px 1fr 26px;
    }

    .ranking-row .rank-label,
    .heat-bar {
        display: none;
    }

    .topic-cloud {
        min-height: 300px;
        padding: 22px;
    }

    .mosaic-grid {
        grid-template-rows: repeat(2, 130px);
    }

    .app-section {
        padding: 38px 24px;
    }

    .qr-card {
        max-width: 260px;
        margin: 0 auto;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-wrap: wrap;
    }

    .channel-hero > .wrap {
        padding: 38px 24px;
    }

    .channel-title-row {
        flex-direction: column;
    }

    .article-card-wide {
        display: block;
        grid-column: auto;
    }

    .article-card-wide img {
        height: auto;
        aspect-ratio: 16 / 9;
    }

    .reading-note {
        flex-direction: column;
    }

    .story-header {
        padding-top: 26px;
    }

    .story-gallery {
        margin-right: 0;
        margin-left: 0;
        grid-template-columns: 1fr;
    }

    .story-actions {
        align-items: stretch;
        flex-direction: column;
    }
}