/* 优途加速器官网 — 单文件样式 */
:root {
    --yt-primary: #5b21b6;
    --yt-primary-dark: #4c1d95;
    --yt-accent: #14b8a6;
    --yt-accent-dark: #0d9488;
    --yt-bg: #faf8ff;
    --yt-surface: #ffffff;
    --yt-text: #1e1b2e;
    --yt-muted: #6b7280;
    --yt-border: #e5e1f0;
    --yt-radius: 12px;
    --yt-radius-lg: 20px;
    --yt-shadow: 0 4px 24px rgba(91, 33, 182, 0.08);
    --yt-transition: 0.25s ease;
}

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

body.yt-page {
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    color: var(--yt-text);
    line-height: 1.65;
    background: var(--yt-bg);
    margin: 0;
}

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

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

a:hover {
    color: var(--yt-accent-dark);
}

html {
    scroll-behavior: smooth;
}

/* —— 导航 —— */
.yt-nav {
    background: var(--yt-surface);
    border-bottom: 1px solid var(--yt-border);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.yt-nav-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.yt-brand img {
    height: 42px;
    width: auto;
}

.yt-toggler {
    border: 1px solid var(--yt-border);
    padding: 0.35rem 0.55rem;
}

.yt-menu .nav-link {
    color: var(--yt-text) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 8px;
}

.yt-menu .nav-link:hover,
.yt-menu .nav-item.active .nav-link {
    color: var(--yt-primary) !important;
    background: rgba(91, 33, 182, 0.06);
}

.yt-nav .navbar-collapse {
    background: var(--yt-surface);
}

@media (max-width: 991px) {
    .yt-nav .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.5rem 0;
        max-height: 70vh;
        overflow-y: auto;
        border-top: 1px solid var(--yt-border);
    }

    .yt-menu .nav-link {
        padding: 0.55rem 0.25rem !important;
    }
}

/* —— 英雄区 —— */
.yt-hero {
    padding: 3.5rem 0 4rem;
    background: linear-gradient(160deg, #f3eeff 0%, #ecfeff 55%, var(--yt-bg) 100%);
    overflow: hidden;
}

.yt-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--yt-primary);
    background: rgba(91, 33, 182, 0.1);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

.yt-hero-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 1rem;
    color: var(--yt-text);
}

.yt-hero-lead {
    font-size: 1.05rem;
    color: var(--yt-muted);
    margin-bottom: 1.75rem;
    max-width: 36em;
}

.yt-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.yt-hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.yt-hero-img {
    max-width: 280px;
    width: 100%;
    border-radius: var(--yt-radius-lg);
    box-shadow: var(--yt-shadow);
    border: 1px solid var(--yt-border);
}

/* —— 按钮 —— */
.yt-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.35rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: transform var(--yt-transition), box-shadow var(--yt-transition);
    white-space: normal;
    text-align: center;
}

.yt-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(91, 33, 182, 0.15);
    color: inherit;
}

.yt-btn--primary {
    background: var(--yt-primary);
    color: #fff !important;
}

.yt-btn--primary:hover {
    background: var(--yt-primary-dark);
    color: #fff !important;
}

.yt-btn--accent {
    background: var(--yt-accent);
    color: #fff !important;
}

.yt-btn--accent:hover {
    background: var(--yt-accent-dark);
    color: #fff !important;
}

.yt-btn--ghost {
    background: var(--yt-surface);
    color: var(--yt-primary) !important;
    border: 2px solid var(--yt-border);
}

.yt-btn--ghost:hover {
    border-color: var(--yt-primary);
    color: var(--yt-primary) !important;
}

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

/* —— 区块通用 —— */
.yt-section {
    padding: 3.5rem 0;
}

.yt-section--light {
    background: var(--yt-surface);
}

.yt-section--alt {
    background: linear-gradient(180deg, #f5f3ff 0%, var(--yt-bg) 100%);
}

.yt-section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.yt-section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin: 0 0 0.75rem;
}

.yt-section-head p {
    color: var(--yt-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— 特点卡片 —— */
.yt-card {
    background: var(--yt-surface);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius);
    padding: 1.5rem;
    height: 100%;
    box-shadow: var(--yt-shadow);
    transition: border-color var(--yt-transition), box-shadow var(--yt-transition);
}

.yt-card:hover {
    border-color: rgba(91, 33, 182, 0.25);
    box-shadow: 0 8px 32px rgba(91, 33, 182, 0.12);
}

.yt-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--yt-primary), var(--yt-accent));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.yt-card h3 {
    font-size: 1.15rem;
    margin: 0 0 0.5rem;
}

.yt-card p {
    margin: 0;
    color: var(--yt-muted);
    font-size: 0.95rem;
}

.yt-panel {
    background: var(--yt-bg);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius);
    padding: 1.25rem 1.5rem;
    height: 100%;
}

.yt-panel h4 {
    font-size: 1.05rem;
    margin: 0 0 0.5rem;
    color: var(--yt-primary);
}

.yt-panel p {
    margin: 0;
    font-size: 0.92rem;
    color: var(--yt-muted);
}

/* —— 数据条 —— */
.yt-band {
    background: linear-gradient(90deg, var(--yt-primary) 0%, #7c3aed 50%, var(--yt-accent-dark) 100%);
    color: #fff;
    padding: 2.5rem 0;
}

.yt-stat {
    padding: 0.5rem;
}

.yt-stat strong {
    display: block;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    line-height: 1.2;
}

.yt-stat span {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* —— 下载区 —— */
.yt-dl-card {
    background: var(--yt-surface);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius-lg);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--yt-shadow);
}

.yt-dl-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.yt-dl-head h3 {
    font-size: 1.15rem;
    margin: 0 0 0.2rem;
}

.yt-muted {
    color: var(--yt-muted);
    font-size: 0.85rem;
    margin: 0;
}

.yt-dl-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    color: #fff;
}

.yt-dl-icon--pc {
    background: linear-gradient(135deg, #6366f1, var(--yt-primary));
}

.yt-dl-icon--mob {
    background: linear-gradient(135deg, var(--yt-accent), #059669);
}

.yt-dl-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem;
    flex: 1;
}

.yt-dl-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--yt-muted);
    margin-bottom: 0.5rem;
    padding: 0.35rem 0;
}

.yt-dl-list li i {
    color: var(--yt-accent-dark);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.yt-dl-note {
    text-align: center;
    font-size: 0.88rem;
    color: var(--yt-muted);
    margin: 1.75rem 0 0;
    max-width: 52em;
    margin-left: auto;
    margin-right: auto;
}

/* —— 安全 —— */
.yt-sec-item {
    background: var(--yt-surface);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius);
    padding: 1.25rem 1rem;
    text-align: center;
    height: 100%;
}

.yt-sec-item i {
    font-size: 1.5rem;
    color: var(--yt-primary);
    margin-bottom: 0.65rem;
}

.yt-sec-item h4 {
    font-size: 0.95rem;
    margin: 0 0 0.35rem;
}

.yt-sec-item p {
    font-size: 0.82rem;
    color: var(--yt-muted);
    margin: 0;
}

/* —— FAQ —— */
.yt-faq {
    background: var(--yt-surface);
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius);
    padding: 1.15rem 1.25rem;
    height: 100%;
}

.yt-faq h5 {
    font-size: 1rem;
    margin: 0 0 0.5rem;
    color: var(--yt-text);
}

.yt-faq p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--yt-muted);
}

/* —— 文章 —— */
.yt-article-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.yt-article-bar h2 {
    font-size: 1.5rem;
    margin: 0;
}

.yt-link-more {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border: 1px solid var(--yt-primary);
    border-radius: 8px;
    color: var(--yt-primary) !important;
}

.yt-link-more:hover {
    background: var(--yt-primary);
    color: #fff !important;
}

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

.yt-article-card:hover {
    box-shadow: var(--yt-shadow);
}

.yt-article-thumb {
    display: block;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    max-height: 120px;
}

.yt-article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.yt-article-body {
    padding: 0.75rem 0.85rem;
    flex: 1;
}

.yt-article-meta {
    font-size: 0.75rem;
    color: var(--yt-muted);
    display: block;
    margin-bottom: 0.35rem;
}

.yt-article-body h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
}

.yt-article-body h3 a {
    color: var(--yt-text);
}

.yt-article-body h3 a:hover {
    color: var(--yt-primary);
}

/* —— 页脚 —— */
.yt-footer {
    background: #1e1b2e;
    color: #c4c0d4;
    padding: 2.5rem 0 1.5rem;
}

.yt-footer h5 {
    color: #fff;
    font-size: 0.95rem;
    margin: 0 0 0.75rem;
}

.yt-footer-desc {
    font-size: 0.88rem;
    margin: 0.75rem 0 0;
    line-height: 1.6;
}

.yt-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.yt-footer-links li {
    margin-bottom: 0.4rem;
}

.yt-footer-links a {
    color: #a8a3bc;
    font-size: 0.88rem;
}

.yt-footer-links a:hover {
    color: var(--yt-accent);
}

.yt-friend {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.yt-friend-list a {
    color: #a8a3bc;
    font-size: 0.85rem;
}

.yt-footer-copy {
    text-align: center;
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
}

.yt-footer-copy p {
    margin: 0.35rem 0;
}

.yt-footer-copy a {
    color: #c4c0d4;
}

/* —— 列表页 / 内页 —— */
.yt-subpage {
    padding: 2rem 0 3rem;
    min-height: 50vh;
}

.yt-subpage .card {
    border: 1px solid var(--yt-border);
    border-radius: var(--yt-radius);
    box-shadow: var(--yt-shadow);
    overflow: hidden;
}

.yt-subpage .card-body {
    padding: 1.25rem;
}

.yt-subpage aside .card {
    margin-bottom: 1rem;
}

.yt-subpage aside .card-body {
    padding: 1rem 1.15rem;
}

.z4a7a7article-content {
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z4a7a7article-content img {
    max-width: 100%;
    height: auto;
}

.z4a7a7meta-tags .list-inline-item {
    margin-bottom: 0.35rem;
}

.z4a7a7meta-tags a {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: rgba(91, 33, 182, 0.08);
    border-radius: 6px;
    font-size: 0.85rem;
}

.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.listbox .e2 li {
    border-color: var(--yt-border) !important;
}

.listbox .e2 li:last-child {
    border-bottom: none !important;
    margin-bottom: 0 !important;
    padding-bottom: 0 !important;
}

/* —— 移动端 —— */
@media (max-width: 767px) {
    .yt-hero {
        padding: 2rem 0 2.5rem;
        text-align: center;
    }

    .yt-hero-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .yt-hero-actions {
        flex-direction: column;
    }

    .yt-hero-actions .yt-btn {
        width: 100%;
    }

    .yt-hero-img {
        max-width: 220px;
    }

    .yt-section {
        padding: 2.5rem 0;
    }

    .yt-section-head {
        margin-bottom: 1.75rem;
    }

    .yt-dl-card {
        padding: 1.15rem;
    }

    .yt-dl-head {
        flex-wrap: wrap;
    }

    .yt-panel {
        padding: 1rem;
    }

    .yt-footer .row > [class*="col-"] {
        text-align: center;
    }

    .yt-footer-links {
        margin-bottom: 0.5rem;
    }

    .yt-friend-list {
        justify-content: center;
    }

    .yt-article-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .yt-article-thumb {
        max-height: 96px;
    }

    .yt-subpage .card-body {
        padding: 1rem;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
        line-height: 1.35;
    }

    .listbox .e2 li p {
        font-size: 0.88rem;
    }

    .z4a7a7thumb-list,
    .z4a7a7thumb-related {
        height: 72px !important;
    }

    .z4a7a7thumb-side {
        height: 50px !important;
    }

    .z4a7a7thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        object-fit: cover;
    }
}

@media (max-width: 575px) {
    .yt-stat strong {
        font-size: 1.35rem;
    }

    .yt-sec-item {
        padding: 1rem 0.75rem;
    }

    .yt-sec-item h4 {
        font-size: 0.88rem;
    }

    .z4a7a7thumb-list,
    .z4a7a7thumb-related {
        height: 64px !important;
    }

    .z4a7a7thumb-cover {
        height: 150px !important;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }
}

.yt-nav .navbar-toggler-icon {
    filter: none;
}

.bg-light {
    background-color: var(--yt-bg) !important;
}