/* ============================================================
   QuickQ 教程汇总页 —— news.css
   作用域：.main-news
   依赖：index.css（导航、尾部、通用组件）
   ============================================================ */


/* ============================================================
   01  教程 Hero
   ============================================================ */
.main-news .guide-hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 42vh;
    padding: 4rem 1rem 3rem;
    overflow: hidden;
    text-align: center;
    background: var(--bg-base);
}

.main-news .guide-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 50% 30%, rgba(79, 124, 255, .08), transparent 70%),
        radial-gradient(ellipse at 20% 80%, rgba(0, 212, 255, .05), transparent 60%);
}

.main-news .guide-hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-news .guide-hero .badge {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    margin-bottom: .9rem;
    padding: .2rem 1rem .2rem .6rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(79, 124, 255, .15);
    background: rgba(79, 124, 255, .12);
    color: var(--accent);
    font-size: .75rem;
    font-weight: 500;
    letter-spacing: .5px;
}

.main-news .guide-hero .badge i { font-size: .5rem; color: #4ee6c0; }

.main-news .guide-hero h1 {
    max-width: 820px;
    color: #fff;
    font-size: clamp(2rem, 4.5vw, 3.4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -.03em;
}

.main-news .guide-hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-news .guide-hero .sub-headline {
    max-width: 720px;
    margin-top: .8rem;
    color: var(--text-muted);
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.8;
}

.main-news .guide-hero .guide-stats {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: .6rem 2rem;
    margin-top: 1.4rem;
    padding: .65rem 2rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .5);
}

.main-news .guide-hero .guide-stats .item {
    color: var(--text-dim);
    font-size: .82rem;
}

.main-news .guide-hero .guide-stats .item strong {
    color: #fff;
    font-weight: 700;
}


/* ============================================================
   02  分类导航
   ============================================================ */
.main-news .category-nav {
    padding: 1.5rem 1rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    text-align: center;
    position: sticky;
    top: 60px;
    z-index: 40;
    backdrop-filter: blur(12px);
}

.main-news .category-nav .nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .6rem 1rem;
    max-width: 860px;
    margin: 0 auto;
}

.main-news .category-nav .nav-links a {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .45rem 1.2rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .5);
    color: var(--text-muted);
    font-size: .85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all .3s ease;
}

.main-news .category-nav .nav-links a:hover {
    border-color: rgba(79, 124, 255, .35);
    background: rgba(79, 124, 255, .08);
    color: #fff;
    transform: translateY(-1px);
}

.main-news .category-nav .nav-links a.active {
    border-color: rgba(79, 124, 255, .45);
    background: linear-gradient(135deg, rgba(79, 124, 255, .18), rgba(0, 212, 255, .08));
    color: #fff;
    box-shadow: 0 4px 16px rgba(79, 124, 255, .2);
}

.main-news .category-nav .nav-links a i {
    color: var(--accent);
    font-size: .8rem;
}


/* ============================================================
   03  通用区块头（教程页）
   ============================================================ */
.main-news .section-header {
    margin-bottom: 2rem;
    text-align: center;
}

.main-news .section-badge {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    margin-bottom: .5rem;
    padding: .2rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(79, 124, 255, .15);
    background: rgba(79, 124, 255, .12);
    color: var(--accent);
    font-size: .7rem;
    font-weight: 500;
    letter-spacing: .5px;
}

.main-news .section-badge i { font-size: .7rem; }

.main-news .section-title {
    color: #fff;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -.02em;
}

.main-news .section-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-news .section-sub {
    max-width: 720px;
    margin: .4rem auto 0;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}


/* ============================================================
   04  精选推荐
   ============================================================ */
.main-news .featured-section {
    padding: 3rem 1rem 4rem;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
}

.main-news .featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-news .featured-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .55);
    overflow: hidden;
    transition: .35s;
}

.main-news .featured-card:hover {
    border-color: rgba(79, 124, 255, .35);
    transform: translateY(-5px);
    box-shadow: 0 20px 48px rgba(0, 0, 0, .5);
}

.main-news .featured-card .featured-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 160px;
    font-size: 3.6rem;
    color: var(--accent);
    transition: transform .4s ease;
}

.main-news .featured-card:hover .featured-cover {
    transform: scale(1.06);
}

.main-news .featured-card .featured-cover i {
    text-shadow: 0 0 30px rgba(78, 230, 192, .4);
}

.main-news .featured-card .featured-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 1.3rem 1.4rem 1.4rem;
}

.main-news .featured-card .featured-tag {
    align-self: flex-start;
    margin-bottom: .5rem;
    padding: .15rem .75rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(78, 230, 192, .25);
    background: rgba(78, 230, 192, .08);
    color: #4ee6c0;
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: .3px;
}

.main-news .featured-card h3 {
    margin-bottom: .55rem;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.4;
}

.main-news .featured-card h3 a {
    color: #fff;
    transition: color .2s;
}

.main-news .featured-card h3 a:hover { color: var(--accent); }

.main-news .featured-card p {
    flex: 1;
    color: var(--text-muted);
    font-size: .86rem;
    line-height: 1.75;
}

.main-news .featured-card .featured-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .4rem 1rem;
    margin-top: 1rem;
    padding-top: .85rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: .72rem;
}

.main-news .featured-card .featured-meta span {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
}

.main-news .featured-card .featured-meta i {
    color: var(--accent);
    font-size: .7rem;
}


/* ============================================================
   05  教程列表（入门 / 进阶 / 排障）
   ============================================================ */
.main-news .guide-section {
    padding: 3rem 1rem 4rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.main-news .guide-section.advanced-section {
    background: var(--bg-dark);
}

.main-news .guide-section.troubleshoot-section {
    background: var(--bg-card);
}

.main-news .guides-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-news .guide-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .55);
    overflow: hidden;
    transition: .35s ease;
}

.main-news .guide-card:hover {
    border-color: rgba(79, 124, 255, .3);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, .4);
}

.main-news .guide-card .guide-img {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 150px;
    overflow: hidden;
}

.main-news .guide-card .guide-img i {
    font-size: 3rem;
    transition: transform .4s ease;
}

.main-news .guide-card:hover .guide-img i {
    transform: scale(1.12) rotate(-4deg);
}

.main-news .guide-card .guide-content {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 1.15rem 1.3rem 1.3rem;
}

.main-news .guide-card h3 {
    margin-bottom: .5rem;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.45;
}

.main-news .guide-card h3 a {
    color: #fff;
    transition: color .2s;
}

.main-news .guide-card h3 a:hover { color: var(--accent); }

.main-news .guide-card .guide-content > p {
    flex: 1;
    display: -webkit-box;
    overflow: hidden;
    color: var(--text-muted);
    font-size: .84rem;
    line-height: 1.7;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.main-news .guide-card .guide-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: .9rem;
    padding-top: .7rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: .75rem;
}

.main-news .guide-card .guide-meta .date {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
}

.main-news .guide-card .guide-meta .read-more {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    color: var(--accent);
    font-weight: 500;
    transition: gap .2s;
}

.main-news .guide-card .guide-meta .read-more:hover { gap: .7rem; }

.main-news .guide-card .guide-meta .read-more i { font-size: .65rem; }


/* ============================================================
   06  学习路径
   ============================================================ */
.main-news .howto-section {
    padding: 3rem 1rem 4rem;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
}

.main-news .howto-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
    max-width: 1080px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-news .howto-card {
    display: flex;
    flex-direction: column;
    padding: 1.8rem 1.5rem 1.6rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .4);
    transition: .3s;
}

.main-news .howto-card:hover {
    border-color: rgba(79, 124, 255, .3);
    transform: translateY(-4px);
    background: rgba(15, 26, 48, .6);
    box-shadow: 0 14px 36px rgba(0, 0, 0, .35);
}

.main-news .howto-card .howto-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: .9rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(79, 124, 255, .25);
    background: rgba(79, 124, 255, .08);
    font-size: 1.4rem;
}

.main-news .howto-card h4 {
    margin-bottom: .5rem;
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -.01em;
}

.main-news .howto-card p {
    flex: 1;
    color: var(--text-muted);
    font-size: .85rem;
    line-height: 1.75;
}

.main-news .howto-card .howto-path {
    display: block;
    margin-top: 1rem;
    padding: .5rem .8rem;
    border-radius: var(--radius-sm);
    border: 1px dashed rgba(79, 124, 255, .2);
    background: rgba(79, 124, 255, .04);
    color: var(--accent);
    font-size: .72rem;
    font-weight: 500;
    letter-spacing: .2px;
    text-align: center;
}


/* ============================================================
   07  底部 CTA
   ============================================================ */
.main-news .cta-section {
    padding: 3rem 1rem 4rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.main-news .cta-section .cta-box {
    max-width: 680px;
    margin: 0 auto;
    padding: 2.2rem 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .4);
    text-align: center;
}

.main-news .cta-section .cta-box h3 {
    margin-bottom: .5rem;
    color: #fff;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -.01em;
}

.main-news .cta-section .cta-box p {
    margin-bottom: 1.3rem;
    color: var(--text-muted);
    font-size: .95rem;
    line-height: 1.75;
}

.main-news .cta-section .cta-buttons {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: .8rem;
}

.main-news .cta-section .btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: .7rem 2rem;
    border-radius: var(--radius-full);
    font-size: .95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all .3s ease;
}

.main-news .cta-section .btn-cta.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 16px rgba(79, 124, 255, .25);
    color: #fff;
}

.main-news .cta-section .btn-cta.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(79, 124, 255, .35);
}

.main-news .cta-section .btn-cta.secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.main-news .cta-section .btn-cta.secondary:hover {
    transform: translateY(-2px);
    background: rgba(79, 124, 255, .06);
    border-color: rgba(79, 124, 255, .3);
    color: #fff;
}


/* ============================================================
   08  响应式
   ============================================================ */

/* ---- 平板 ---- */
@media (max-width: 1024px) {
    .main-news .featured-grid { grid-template-columns: repeat(2, 1fr); }
    .main-news .guides-grid { grid-template-columns: repeat(2, 1fr); }
    .main-news .howto-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- 中小屏 ---- */
@media (max-width: 820px) {
    .main-news .guide-hero {
        min-height: auto;
        padding: 3rem 1rem 2.5rem;
    }
    .main-news .guide-hero h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); }
    .main-news .guide-hero .guide-stats {
        flex-wrap: wrap;
        justify-content: center;
        padding: .55rem 1rem;
    }

    .main-news .category-nav {
        position: sticky;
        top: 56px;
        padding: 1rem .8rem;
    }
    .main-news .category-nav .nav-links { gap: .4rem .6rem; }
    .main-news .category-nav .nav-links a {
        padding: .35rem .9rem;
        font-size: .75rem;
    }

    .main-news .featured-grid { grid-template-columns: 1fr; }
    .main-news .guides-grid { grid-template-columns: 1fr; }
    .main-news .howto-grid { grid-template-columns: 1fr; }

    .main-news .featured-card .featured-cover { height: 130px; }
    .main-news .guide-card .guide-img { height: 130px; }
}

/* ---- 手机 ---- */
@media (max-width: 600px) {
    .main-news .featured-section,
    .main-news .guide-section,
    .main-news .howto-section,
    .main-news .cta-section {
        padding-left: .5rem;
        padding-right: .5rem;
    }
    .main-news .featured-grid,
    .main-news .guides-grid,
    .main-news .howto-grid {
        padding: 0 .5rem;
        gap: 1.1rem;
    }
    .main-news .featured-card .featured-cover { height: 120px; font-size: 3rem; }
    .main-news .featured-card h3 { font-size: 1rem; }
    .main-news .featured-card p { font-size: .82rem; }
    .main-news .guide-card h3 { font-size: .95rem; }
    .main-news .guide-card .guide-content > p { font-size: .8rem; }
    .main-news .howto-card { padding: 1.4rem 1.2rem 1.3rem; }
    .main-news .howto-card h4 { font-size: .98rem; }
    .main-news .howto-card p { font-size: .82rem; }

    .main-news .cta-section .cta-buttons { flex-direction: column; }
    .main-news .cta-section .btn-cta {
        justify-content: center;
        width: 100%;
        max-width: 280px;
    }
}

/* ---- 极小屏 ---- */
@media (max-width: 480px) {
    .main-news .guide-hero h1 { font-size: 1.6rem; }
    .main-news .guide-hero .guide-stats .item { font-size: .75rem; }

    .main-news .category-nav {
        top: 52px;
        padding: .8rem .5rem;
    }
    .main-news .category-nav .nav-links { gap: .3rem .4rem; }
    .main-news .category-nav .nav-links a {
        padding: .3rem .7rem;
        font-size: .7rem;
    }
    .main-news .category-nav .nav-links a i { font-size: .7rem; }

    .main-news .featured-card .featured-body { padding: 1rem 1.1rem 1.1rem; }
    .main-news .featured-card .featured-cover { height: 110px; font-size: 2.6rem; }

    .main-news .guide-card .guide-content { padding: 1rem 1.1rem 1.1rem; }

    .main-news .cta-section .cta-box { padding: 1.5rem 1rem; }
    .main-news .cta-section .cta-box h3 { font-size: 1.15rem; }
}