/* OKX / 欧易下载官网 — 全新主题 */
:root {
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #ccfbf1;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --bg: #f8fafc;
    --bg-alt: #f1f5f9;
    --surface: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 8px 24px rgba(13, 148, 136, 0.12);
    --radius: 10px;
    --radius-lg: 14px;
    --section-pad: 3.25rem;
    --nav-h: 72px;
    --max-w: 1180px;
    --transition: 0.25s ease;
    --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    line-height: 1.65;
    background: var(--bg);
    overflow-x: hidden;
}

/* 防止 Grid/Flex 子项撑破容器 */
.ox-container,
.ox-hero__grid > *,
.ox-features__grid > *,
.ox-download__grid > *,
.ox-security__grid > *,
.ox-faq__grid > *,
.ox-articles__grid > *,
.ox-intro__grid > *,
.ox-stats__grid > *,
.ox-certs > *,
.ox-footer__grid > *,
.ox-layout > * {
    min-width: 0;
}

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

a { color: var(--primary-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }

.ox-container {
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* —— 导航 —— */
.ox-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-h);
}

.ox-nav__inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-h);
    gap: 1rem;
}

.ox-nav__brand img { height: 42px; width: auto; }

.ox-nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
}

.ox-nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.ox-nav__menu {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.2rem;
    list-style: none;
    margin: 0;
    padding: 0;
    max-width: calc(100% - 160px);
}

.ox-nav__link {
    display: block;
    padding: 0.4rem 0.65rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    border-radius: 6px;
    white-space: nowrap;
    line-height: 1.3;
}

.ox-nav__link:hover,
.ox-nav__item.active .ox-nav__link {
    color: var(--primary-dark);
    background: var(--primary-light);
}

/* —— 按钮 —— */
.ox-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    white-space: normal;
    text-align: center;
    max-width: 100%;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    text-decoration: none;
}

.ox-btn:hover { text-decoration: none; }

@media (hover: hover) {
    .ox-btn:hover { transform: translateY(-1px); }
}

.ox-btn--primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
}

.ox-btn--primary:hover { color: #fff; box-shadow: var(--shadow-lg); }

.ox-btn--outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.85);
}

.ox-btn--outline:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.ox-btn--light {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: var(--shadow);
}

.ox-btn--light:hover { color: var(--primary-dark); }

.ox-btn--sm { padding: 0.5rem 1rem; font-size: 0.875rem; }

.ox-btn--block { width: 100%; }

/* 统一卡片边框（避免双边框+重阴影） */
.ox-surface {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

/* —— Hero —— */
.ox-hero {
    position: relative;
    padding: 3rem 0 3.5rem;
    background: linear-gradient(160deg, #042f2e 0%, #0f766e 45%, #14b8a6 100%);
    color: #fff;
    overflow: hidden;
}

.ox-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.15), transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(255, 255, 255, 0.08), transparent 40%);
    pointer-events: none;
}

.ox-hero__grid {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem 2.5rem;
    align-items: center;
}

.ox-hero__badge {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}

.ox-hero__title {
    font-size: clamp(1.85rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 1rem;
}

.ox-hero__lead {
    font-size: 1.05rem;
    opacity: 0.92;
    margin: 0 0 1.75rem;
    max-width: 32em;
    word-break: break-word;
}

.ox-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.ox-hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-hero__tags li {
    font-size: 0.78rem;
    padding: 0.35rem 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    opacity: 0.9;
}

.ox-hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ox-hero__img-wrap {
    position: relative;
    padding: 1rem;
    max-width: 100%;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.ox-hero__img {
    width: 100%;
    max-width: 260px;
    margin: 0 auto;
    border-radius: calc(var(--radius) - 2px);
}

/* —— 区块通用 —— */
.ox-section {
    padding: var(--section-pad) 0;
}

.ox-section--alt { background: var(--bg-alt); }

.ox-section__head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.25rem;
}

.ox-section__label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.ox-section__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    margin: 0 0 0.75rem;
    color: var(--text);
}

.ox-section__desc {
    color: var(--text-muted);
    margin: 0;
    font-size: 1.05rem;
}

/* —— 统计条 —— */
.ox-stats {
    background: var(--text);
    color: #fff;
    padding: 2.25rem 0;
}

.ox-stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem 1.5rem;
    text-align: center;
}

.ox-stats__grid > div {
    padding: 0.75rem 0.5rem;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.ox-stats__grid > div:last-child {
    border-right: none;
}

.ox-stats__num {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
}

.ox-stats__label {
    font-size: 0.95rem;
    opacity: 0.85;
    margin-top: 0.35rem;
}

/* —— 特色卡片 —— */
.ox-features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.ox-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.35rem 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), border-color var(--transition);
    height: 100%;
    overflow: hidden;
}

.ox-card:hover {
    border-color: rgba(13, 148, 136, 0.35);
    box-shadow: var(--shadow-md);
}

.ox-card__icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 14px;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.ox-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 0.6rem;
}

.ox-card__text {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.55;
    word-break: break-word;
}

/* —— 介绍双栏 —— */
.ox-intro__grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 1.75rem;
    align-items: stretch;
}

.ox-intro__content {
    padding: 0.25rem 0;
}

.ox-intro__content .ox-section__head {
    text-align: left;
    margin: 0 0 1.25rem;
    max-width: none;
}

.ox-intro__content h3 {
    font-size: 1.35rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--primary-dark);
}

.ox-intro__content p {
    color: var(--text-muted);
    margin: 0 0 1rem;
}

.ox-intro__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-intro__list li {
    position: relative;
    padding: 0.65rem 0 0.65rem 1.75rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.ox-intro__list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.ox-intro__panel {
    background: linear-gradient(145deg, var(--primary-dark), var(--primary));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-md);
    height: 100%;
}

.ox-intro__panel h4 {
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

.ox-intro__steps {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-intro__steps li {
    counter-increment: step;
    padding: 0.85rem 0;
    padding-left: 2.5rem;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 0.92rem;
}

.ox-intro__steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    width: 1.75rem;
    height: 1.75rem;
    background: var(--accent);
    color: var(--text);
    font-weight: 800;
    font-size: 0.8rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* —— 下载 —— */
.ox-download__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}

.ox-download-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.35rem 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.ox-download-card:hover {
    border-color: rgba(13, 148, 136, 0.35);
    box-shadow: var(--shadow-md);
}

.ox-download-card__head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.ox-download-card__icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.ox-download-card__icon--win { background: #dbeafe; }
.ox-download-card__icon--android { background: #dcfce7; }
.ox-download-card__icon--ios { background: #f3e8ff; }

.ox-download-card__meta h3 {
    margin: 0;
    font-size: 1.1rem;
}

.ox-download-card__meta p {
    margin: 0.2rem 0 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.ox-download-card__list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
    flex: 1;
}

.ox-download-card__list li {
    padding: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    padding-left: 1.25rem;
    position: relative;
}

.ox-download-card__list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* —— 安全 —— */
.ox-security__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.ox-security-card {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ox-security-card__icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.ox-security-card h3 {
    font-size: 1rem;
    margin: 0 0 0.5rem;
}

.ox-security-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
    max-width: 14em;
}

.ox-certs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.ox-cert {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(13, 148, 136, 0.15);
}

.ox-cert h4 { margin: 0.5rem 0 0.25rem; font-size: 1rem; }
.ox-cert p { margin: 0; font-size: 0.85rem; color: var(--text-muted); }

/* —— FAQ —— */
.ox-faq__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.ox-faq-item {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    height: 100%;
}

.ox-faq-item h3 {
    font-size: 1rem;
    margin: 0 0 0.6rem;
    color: var(--primary-dark);
}

.ox-faq-item p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.55;
    word-break: break-word;
}

/* —— 文章 —— */
.ox-articles__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.ox-articles__head h2 { margin: 0; font-size: 1.5rem; }

.ox-articles__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.ox-article-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: border-color var(--transition), box-shadow var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.ox-article-card:hover {
    border-color: rgba(13, 148, 136, 0.35);
    box-shadow: var(--shadow-md);
}

.ox-article-card__img {
    width: 100%;
    height: 110px;
    object-fit: cover;
}

.ox-article-card__body {
    padding: 0.75rem 0.85rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.ox-article-card__meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.ox-article-card__title {
    font-size: 0.875rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ox-article-card__title a {
    color: var(--text);
}

.ox-article-card__title a:hover { color: var(--primary); }

/* —— 页脚 —— */
.ox-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 3.5rem 0 1.5rem;
}

.ox-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.ox-footer__brand p {
    font-size: 0.9rem;
    margin: 1rem 0 0;
    line-height: 1.6;
}

.ox-footer__title {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.ox-footer__links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-footer__links li { margin-bottom: 0.5rem; }

.ox-footer__links a {
    color: #94a3b8;
    font-size: 0.9rem;
}

.ox-footer__links a:hover { color: #fff; }

.ox-footer__friends {
    border-top: 1px solid #334155;
    padding-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.ox-footer__friends .ox-footer__title { margin-bottom: 0.75rem; }

.ox-friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-friend-links a { color: #94a3b8; font-size: 0.85rem; }
.ox-friend-links a:hover { color: var(--accent); }

.ox-footer__bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid #334155;
    font-size: 0.85rem;
}

.ox-footer__bottom p { margin: 0.35rem 0; }
.ox-footer__bottom a { color: #cbd5e1; }
.ox-footer__bottom a:hover { color: #fff; }

/* —— 列表页 / 内页 —— */
.ox-page-main {
    padding: 2.5rem 0 4rem;
}

.ox-page-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.ox-page-header h1 {
    font-size: 1.75rem;
    margin: 0 0 0.5rem;
}

.ox-page-header p {
    margin: 0;
    color: var(--text-muted);
}

.ox-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 300px);
    gap: 1.5rem;
    align-items: start;
}

.ox-panel {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    overflow: hidden;
}

.ox-panel:last-child {
    margin-bottom: 0;
}

.ox-list-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

.ox-list-item:first-child { padding-top: 0; }
.ox-list-item:last-child { border-bottom: none; padding-bottom: 0; }

.ox-list-item__img {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: var(--radius);
}

.ox-list-item__meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.ox-list-item__title {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0 0 0.4rem;
    word-break: break-word;
}

.ox-list-item__title a { color: var(--text); }
.ox-list-item__title a:hover { color: var(--primary); }

.ox-list-item__desc {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.ox-sidebar-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.ox-sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ox-sidebar-list li {
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.ox-sidebar-list li:last-child { border-bottom: none; }

.ox-sidebar-hot {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    align-items: flex-start;
}

.ox-sidebar-hot img {
    width: 72px;
    height: 54px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.ox-sidebar-hot a:last-child {
    flex: 1;
    min-width: 0;
    font-size: 0.88rem;
    line-height: 1.4;
    word-break: break-word;
}

.ox-article-header h1 {
    font-size: 1.5rem;
    margin: 0 0 0.75rem;
}

.ox-article-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.ox-article-meta span { margin-right: 1.25rem; }

.ox-article-cover {
    max-width: 100%;
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.ox-article-content {
    line-height: 1.8;
    font-size: 1rem;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.ox-article-content img,
.ox-article-content video,
.ox-article-content iframe {
    max-width: 100%;
    height: auto;
    margin: 1rem 0;
}

.ox-article-content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.ox-tags {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ox-tags li a {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    background: var(--primary-light);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--primary-dark);
}

.ox-related-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.ox-related-item:last-child { border-bottom: none; }

.ox-related-item img {
    width: 100%;
    height: 72px;
    object-fit: cover;
    border-radius: 8px;
}

.pagebar .pagelist,
.zzpages .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
}

.pagebar .pagelist li { display: inline-flex; }

.pagebar .pagelist a,
.zzpages .pagelist a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    min-width: 40px;
    padding: 0.35rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
    background: var(--surface);
}

.ox-prenext {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 576px) {
    .ox-prenext {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 1rem;
    }
}

/* —— 响应式 —— */
@media (max-width: 1100px) {
    .ox-nav__menu {
        max-width: calc(100% - 150px);
    }

    .ox-nav__link {
        padding: 0.35rem 0.5rem;
        font-size: 0.8125rem;
    }
}

@media (max-width: 1024px) {
    :root { --section-pad: 2.75rem; }

    .ox-features__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ox-download__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ox-download__grid .ox-download-card:last-child:nth-child(odd) {
        grid-column: 1 / -1;
    }
    .ox-security__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ox-articles__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .ox-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .ox-intro__grid { grid-template-columns: 1fr; }
}

/* 平板及以下：折叠导航 */
@media (max-width: 992px) {
    :root {
        --section-pad: 2.5rem;
        --nav-h: 60px;
    }

    .ox-nav {
        overflow: visible;
    }

    .ox-nav__toggle {
        display: flex;
        flex-shrink: 0;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
    }

    .ox-nav__brand {
        flex-shrink: 0;
        max-width: 55%;
    }

    .ox-nav__brand img {
        height: 36px;
        max-width: 100%;
        object-fit: contain;
    }

    .ox-nav__menu {
        display: none;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        width: 100%;
        max-width: none;
        max-height: calc(100vh - var(--nav-h));
        max-height: calc(100dvh - var(--nav-h));
        flex-direction: column;
        align-items: stretch;
        flex-wrap: nowrap;
        gap: 0;
        margin: 0;
        padding: 0.5rem 0;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 999;
    }

    .ox-nav__menu.is-open {
        display: flex;
    }

    .ox-nav__item {
        border-bottom: 1px solid var(--border);
    }

    .ox-nav__item:last-child {
        border-bottom: none;
    }

    .ox-nav__link {
        padding: 0.85rem 1.25rem;
        font-size: 0.9375rem;
        white-space: normal;
        border-radius: 0;
    }

    .ox-nav__link:hover,
    .ox-nav__item.active .ox-nav__link {
        background: var(--primary-light);
    }

    body.ox-nav-open {
        overflow: hidden;
    }

    /* Hero 移动端 */
    .ox-hero {
        padding: 2rem 0 2.5rem;
    }

    .ox-hero__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .ox-hero__visual {
        order: -1;
    }

    .ox-hero__img-wrap {
        max-width: 280px;
        margin: 0 auto;
    }

    .ox-hero__img {
        max-width: 200px;
    }

    .ox-hero__title {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }

    .ox-hero__lead {
        font-size: 0.95rem;
        margin-left: auto;
        margin-right: auto;
        max-width: 100%;
    }

    .ox-hero__actions {
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        margin-bottom: 1.5rem;
    }

    .ox-hero__actions .ox-btn {
        width: 100%;
    }

    .ox-hero__tags {
        justify-content: center;
    }

    .ox-stats__grid > div {
        border-right: none;
    }

    .ox-stats__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem 0.75rem;
    }

    .ox-features__grid {
        grid-template-columns: 1fr;
    }

    .ox-download__grid {
        grid-template-columns: 1fr;
    }

    .ox-download__grid .ox-download-card:last-child:nth-child(odd) {
        grid-column: auto;
    }

    .ox-security__grid {
        grid-template-columns: 1fr;
    }

    .ox-faq__grid {
        grid-template-columns: 1fr;
    }

    .ox-certs {
        grid-template-columns: 1fr;
    }

    .ox-articles__grid {
        grid-template-columns: 1fr;
    }

    .ox-articles__head {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .ox-articles__head .ox-btn {
        width: 100%;
    }

    .ox-section__head {
        margin-bottom: 1.75rem;
    }

    .ox-section__title {
        font-size: clamp(1.35rem, 5vw, 1.65rem);
    }

    .ox-section__desc {
        font-size: 0.95rem;
    }

    .ox-intro__content,
    .ox-intro__content .ox-section__head {
        text-align: left;
    }

    .ox-intro__panel {
        padding: 1.25rem 1.35rem;
    }

    .ox-footer__grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.75rem;
    }

    .ox-footer__brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .ox-friend-links {
        justify-content: center;
    }

    .ox-footer__bottom p {
        line-height: 1.7;
        padding: 0 0.25rem;
    }

    /* 列表 / 内页 */
    .ox-layout {
        grid-template-columns: 1fr;
    }

    .ox-page-main {
        padding: 1.5rem 0 2.5rem;
    }

    .ox-page-header {
        margin-bottom: 1.25rem;
        padding-bottom: 1rem;
    }

    .ox-page-header h1 {
        font-size: clamp(1.25rem, 5vw, 1.5rem);
    }

    .ox-panel {
        padding: 1rem 1.15rem;
    }

    .ox-list-item {
        grid-template-columns: 100px 1fr;
        gap: 0.85rem;
        padding: 1rem 0;
    }

    .ox-article-header h1 {
        font-size: clamp(1.2rem, 5vw, 1.4rem);
    }

    .ox-article-meta {
        display: flex;
        flex-direction: column;
        gap: 0.35rem;
    }

    .ox-article-meta span {
        margin-right: 0;
        display: block;
    }

    .ox-article-cover {
        max-height: 220px;
    }

    .ox-related-item {
        grid-template-columns: 88px 1fr;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    :root {
        --section-pad: 2rem;
        --nav-h: 56px;
    }

    .ox-container {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }

    .ox-hero__badge {
        font-size: 0.72rem;
        padding: 0.3rem 0.7rem;
    }

    .ox-hero__img-wrap {
        padding: 0.75rem;
    }

    .ox-stats {
        padding: 1.5rem 0;
    }

    .ox-stats__num {
        font-size: clamp(1.35rem, 6vw, 1.75rem);
    }

    .ox-stats__label {
        font-size: 0.85rem;
    }

    .ox-card,
    .ox-download-card,
    .ox-faq-item {
        padding: 1.15rem 1.2rem;
    }

    .ox-download-card__head {
        flex-wrap: wrap;
    }

    .ox-article-card__img {
        height: 160px;
    }

    .ox-list-item {
        grid-template-columns: 1fr;
    }

    .ox-list-item__img {
        height: 150px;
    }

    .ox-related-item {
        grid-template-columns: 1fr;
    }

    .ox-related-item img {
        height: 130px;
    }

    .ox-footer {
        padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
    }

    .ox-footer__bottom a {
        display: inline-block;
        margin: 0.15rem 0;
    }
}