:root {
    --bg: #f7f8f3;
    --surface: #ffffff;
    --ink: #161817;
    --muted: #626963;
    --line: #dfe4da;
    --soft: #eef3ea;
    --capcut: #111111;
    --teal: #00cbb8;
    --rose: #f04c86;
    --amber: #f0c84b;
    --blue: #2563eb;
    --shadow: 0 18px 42px rgba(29, 34, 31, 0.08);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--gh-font-body, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
    font-size: 16px;
    line-height: 1.55;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: #0b766e;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

.site-frame {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 24px;
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 24px 12px;
    background: rgba(247, 248, 243, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.site-header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 3px;
    background: linear-gradient(90deg, var(--teal), var(--rose), var(--amber), var(--blue));
}

.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 800;
}

.official-capcut-logo {
    width: 86px;
    height: auto;
    object-fit: contain;
}

.guide-wordmark {
    font-size: 1.22rem;
    line-height: 1;
}

.main-nav {
    margin-left: auto;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 12px;
    border-radius: 6px;
    color: var(--muted);
    font-weight: 700;
    font-size: 0.92rem;
}

.main-nav .nav-current a,
.main-nav a:hover {
    background: var(--soft);
    color: var(--ink);
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    margin-left: auto;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 4px 0;
    background: var(--ink);
}

.site-main,
.archive-main,
.post-main,
.error-page {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 24px 72px;
}

.home-hero {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
    gap: 34px;
    align-items: start;
    padding: 22px 0 28px;
    border-bottom: 1px solid var(--line);
}

.hero-copy {
    max-width: 720px;
    padding-top: 8px;
}

.eyebrow {
    margin: 0 0 12px;
    color: #0b766e;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    color: var(--ink);
    font-family: var(--gh-font-heading, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
    line-height: 1.08;
}

.home-hero h1 {
    max-width: 650px;
    font-size: 2.55rem;
}

.hero-text {
    max-width: 640px;
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 1.04rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
}

.hero-actions a,
.pagination-link,
.error-page a,
.back-link {
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface);
    color: var(--ink);
    font-weight: 800;
}

.hero-actions a {
    padding: 9px 12px;
}

.hero-actions a:first-child {
    border-color: var(--ink);
    background: var(--ink);
    color: #ffffff;
}

.hero-banner {
    align-self: center;
    margin: 0;
}

.hero-banner img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 24px 54px rgba(23, 29, 26, 0.13);
}

.seo-hub {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(300px, 1.08fr);
    gap: 30px;
    align-items: start;
    padding: 30px 0;
    border-bottom: 1px solid var(--line);
}

.seo-hub h2,
.search-intent h2 {
    font-size: 1.55rem;
}

.seo-hub p,
.search-intent p {
    margin: 14px 0 0;
    color: var(--muted);
}

.seo-link-list {
    columns: 2;
    column-gap: 18px;
    padding-top: 2px;
}

.seo-link-list a {
    display: inline-block;
    width: 100%;
    margin: 0 0 10px;
    padding-bottom: 9px;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    font-weight: 850;
}

.seo-link-list a:hover {
    color: #0b766e;
}

.search-intent {
    display: grid;
    grid-template-columns: minmax(0, 330px) minmax(0, 1fr);
    gap: 30px;
    padding: 30px 0 8px;
    border-bottom: 1px solid var(--line);
}

.search-intent dl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
    margin: 0;
}

.search-intent dt {
    color: var(--ink);
    font-weight: 900;
}

.search-intent dd {
    margin: 6px 0 0;
    color: var(--muted);
}

.home-intro,
.archive-head {
    display: grid;
    grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
    gap: 28px;
    padding: 42px 0 18px;
}

.home-intro h2,
.archive-head h1 {
    font-size: 1.85rem;
}

.home-intro p:last-child,
.archive-head p:last-child {
    margin: 0;
    color: var(--muted);
    max-width: 640px;
}

.lesson-list {
    border-top: 1px solid var(--ink);
}

.lesson-row {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr) auto;
    gap: 18px;
    align-items: center;
    min-height: 132px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.lesson-row:hover {
    background: rgba(255, 255, 255, 0.56);
}

.lesson-media img {
    width: 116px;
    aspect-ratio: 16 / 10;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--line);
}

.lesson-body h2 {
    margin: 4px 0 7px;
    font-size: 1.28rem;
}

.lesson-body p {
    max-width: 710px;
    margin: 0;
    color: var(--muted);
}

.lesson-kicker {
    color: #0b766e;
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.lesson-meta,
.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
    color: #7a817b;
    font-size: 0.86rem;
}

.lesson-open {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 72px;
    min-height: 38px;
    padding: 0 12px;
    border: 1px solid var(--ink);
    border-radius: 6px;
    color: var(--ink);
    font-weight: 900;
}

.empty-state {
    padding: 38px 0;
}

.empty-state h2 {
    font-size: 1.45rem;
}

.empty-state p {
    margin: 8px 0 0;
    color: var(--muted);
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding-top: 28px;
}

.pagination-link {
    padding: 9px 12px;
}

.pagination-count {
    color: var(--muted);
    font-size: 0.9rem;
}

.post-shell {
    max-width: 1040px;
    margin: 0 auto;
}

.post-header {
    max-width: 840px;
    padding: 22px 0 20px;
}

.post-header.compact {
    padding-bottom: 28px;
    border-bottom: 1px solid var(--line);
}

.post-header h1 {
    margin-top: 8px;
    font-size: 2.55rem;
}

.post-header p {
    max-width: 720px;
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 1.05rem;
}

.post-feature {
    margin: 8px 0 30px;
}

.post-feature img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.post-feature figcaption {
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.85rem;
}

.article-layout {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
}

.article-rail {
    position: sticky;
    top: 84px;
}

.rail-box {
    display: grid;
    gap: 8px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
}

.rail-box span {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.rail-box p {
    margin: 0;
    padding: 6px 0;
    border-top: 1px solid var(--line);
    font-weight: 800;
}

.gh-content {
    max-width: 760px;
    color: #262a27;
    font-size: 1.06rem;
    line-height: 1.75;
}

.page-main .gh-content {
    max-width: 820px;
}

.gh-content > *:first-child {
    margin-top: 0;
}

.gh-content h2 {
    margin: 42px 0 12px;
    font-size: 1.75rem;
}

.gh-content h3 {
    margin: 30px 0 10px;
    font-size: 1.28rem;
}

.gh-content p,
.gh-content ul,
.gh-content ol {
    margin: 0 0 18px;
}

.gh-content a {
    color: #0b766e;
    font-weight: 800;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.gh-content img,
.kg-image-card img,
.kg-gallery-image img {
    border-radius: 8px;
}

.kg-card {
    margin: 28px 0;
}

.kg-width-wide {
    width: min(100%, 980px);
    margin-left: calc((760px - min(100%, 980px)) / 2);
}

.kg-width-full {
    width: 100vw;
    max-width: 1180px;
    margin-left: calc((760px - min(100vw, 1180px)) / 2);
}

.kg-callout-card {
    border-radius: 8px;
}

.kg-bookmark-card,
.kg-toggle-card {
    border-radius: 8px;
    overflow: hidden;
}

.post-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 760px;
    margin: 40px 0 0 214px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.post-tags a {
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface);
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.back-link {
    padding: 8px 11px;
}

.archive-head {
    align-items: end;
    border-bottom: 1px solid var(--line);
    margin-bottom: 18px;
}

.author-head img {
    width: 74px;
    height: 74px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--line);
}

.error-page {
    max-width: 720px;
    text-align: center;
}

.error-page h1 {
    font-size: 2.3rem;
}

.error-page p:not(.eyebrow) {
    color: var(--muted);
}

.error-page a {
    display: inline-flex;
    margin-top: 12px;
    padding: 10px 13px;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 28px;
    width: 100%;
    max-width: 1180px;
    margin: auto auto 0;
    padding: 28px 24px 34px;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.site-footer p {
    max-width: 500px;
    margin: 9px 0 0;
    font-size: 0.9rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-content: start;
}

.footer-nav a {
    font-weight: 800;
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .site-header {
        padding-left: 18px;
        padding-right: 18px;
    }

    .site-header::before {
        left: 18px;
        right: 18px;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 66px;
        left: 18px;
        right: 18px;
        margin: 0;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: var(--surface);
        box-shadow: var(--shadow);
    }

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

    .main-nav ul {
        display: grid;
        gap: 4px;
    }

    .main-nav a {
        width: 100%;
    }

    .home-hero,
    .seo-hub,
    .search-intent,
    .home-intro,
    .archive-head,
    .article-layout {
        grid-template-columns: 1fr;
    }

    .home-hero h1,
    .post-header h1 {
        font-size: 2rem;
    }

    .hero-banner {
        max-width: 520px;
    }

    .seo-link-list {
        columns: 1;
    }

    .search-intent dl {
        grid-template-columns: 1fr;
    }

    .article-rail {
        position: static;
    }

    .rail-box {
        grid-template-columns: repeat(3, 1fr);
    }

    .rail-box span {
        grid-column: 1 / -1;
    }

    .post-footer {
        max-width: 760px;
        margin-left: 0;
    }

    .kg-width-wide,
    .kg-width-full {
        width: 100%;
        margin-left: 0;
    }
}

@media (max-width: 640px) {
    .site-main,
    .archive-main,
    .post-main,
    .error-page {
        padding-left: 18px;
        padding-right: 18px;
    }

    .guide-wordmark {
        font-size: 1.08rem;
    }

    .official-capcut-logo {
        width: 78px;
        height: auto;
    }

    .home-hero {
        gap: 22px;
        padding-top: 16px;
    }

    .hero-text,
    .post-header p,
    .gh-content {
        font-size: 1rem;
    }

    .hero-actions a {
        flex: 1 1 calc(50% - 8px);
        justify-content: center;
    }

    .lesson-row {
        grid-template-columns: 84px minmax(0, 1fr);
        gap: 12px;
        min-height: 110px;
    }

    .lesson-media img {
        width: 84px;
    }

    .lesson-body h2 {
        font-size: 1.08rem;
    }

    .lesson-body p {
        display: none;
    }

    .lesson-open {
        grid-column: 1 / -1;
        width: 100%;
    }

    .rail-box {
        grid-template-columns: 1fr;
    }

    .site-footer {
        flex-direction: column;
        padding-left: 18px;
        padding-right: 18px;
    }
}