/* ============================================================
   QuickQ 帮助中心 —— faq.css
   作用域：.main-faq
   依赖：index.css（导航、尾部、通用组件）
   ============================================================ */


/* ============================================================
   01  Help Hero
   ============================================================ */
.main-faq .faq-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-faq .faq-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-faq .faq-hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.main-faq .faq-hero h1 {
    max-width: 780px;
    color: #fff;
    font-size: clamp(2rem, 4.5vw, 3.4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -.03em;
}

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

.main-faq .faq-hero .sub-headline {
    max-width: 680px;
    margin-top: .8rem;
    color: var(--text-muted);
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.8;
}

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

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


/* ============================================================
   02  分类快捷导航
   ============================================================ */
.main-faq .faq-nav {
    padding: 1.6rem 1rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.main-faq .faq-nav .nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .6rem 1rem;
    max-width: 820px;
    margin: 0 auto;
}

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

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


/* ============================================================
   03  通用区块头（帮助中心）
   ============================================================ */
.main-faq .section-header {
    margin-bottom: 2rem;
    text-align: center;
}

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

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

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

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


/* ============================================================
   04  安装与启用
   ============================================================ */
.main-faq .faq-content {
    padding: 3rem 1rem 4rem;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
}

.main-faq .faq-category {
    max-width: 860px;
    margin: 0 auto 2.5rem;
}

.main-faq .faq-category:last-child {
    margin-bottom: 0;
}

.main-faq .faq-category .cat-title {
    display: flex;
    align-items: center;
    gap: .7rem;
    margin-bottom: 1rem;
    padding-bottom: .6rem;
    border-bottom: 2px solid rgba(79, 124, 255, .2);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -.01em;
}

.main-faq .faq-category .cat-title i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(79, 124, 255, .25);
    background: rgba(79, 124, 255, .1);
    color: var(--accent);
    font-size: 1rem;
}

/* 步骤条目（.faq-item） */
.main-faq .faq-item {
    margin-bottom: .7rem;
    padding: 1.1rem 1.3rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .4);
    transition: .3s;
}

.main-faq .faq-item:last-child { margin-bottom: 0; }

.main-faq .faq-item:hover {
    border-color: rgba(79, 124, 255, .25);
    background: rgba(15, 26, 48, .6);
    box-shadow: 0 6px 22px rgba(0, 0, 0, .3);
}

.main-faq .faq-item .q {
    display: flex;
    align-items: center;
    gap: .55rem;
    color: #fff;
    font-size: .98rem;
    font-weight: 700;
    line-height: 1.5;
}

.main-faq .faq-item .q i {
    flex-shrink: 0;
    color: var(--accent);
    font-size: .78rem;
    transition: transform .2s;
}

.main-faq .faq-item:hover .q i { transform: translateX(2px); }

.main-faq .faq-item .a {
    margin-top: .45rem;
    padding-left: 1.55rem;
    color: var(--text-muted);
    font-size: .88rem;
    line-height: 1.85;
}

.main-faq .faq-item .a p { margin: 0; }

.main-faq .faq-item .a strong {
    color: #eaf0ff;
    font-weight: 600;
}

.main-faq .faq-item .a a {
    color: var(--accent);
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px dashed rgba(0, 212, 255, .4);
    transition: color .2s;
}

.main-faq .faq-item .a a:hover { color: #fff; }

.main-faq .faq-item .a code {
    display: inline-block;
    margin: 0 .15rem;
    padding: .05rem .4rem;
    border-radius: 4px;
    border: 1px solid hsla(0, 0%, 100%, .08);
    background: hsla(0, 0%, 100%, .05);
    color: #4ee6c0;
    font-family: "JetBrains Mono", "Fira Code", Menlo, monospace;
    font-size: .82em;
}


/* ============================================================
   05  基础配置
   ============================================================ */
.main-faq .setup-section {
    background: var(--bg-card);
}

.main-faq .setup-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
    max-width: 1160px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-faq .setup-card {
    display: flex;
    flex-direction: column;
    padding: 1.6rem 1.3rem 1.4rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(15, 26, 48, .45);
    transition: .3s;
}

.main-faq .setup-card:hover {
    border-color: rgba(79, 124, 255, .28);
    transform: translateY(-4px);
    background: rgba(15, 26, 48, .65);
    box-shadow: 0 14px 36px rgba(0, 0, 0, .35);
}

.main-faq .setup-card .setup-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: .9rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(79, 124, 255, .25);
    background: linear-gradient(135deg, rgba(79, 124, 255, .18), rgba(0, 212, 255, .08));
    color: var(--accent);
    font-size: 1.25rem;
}

.main-faq .setup-card h4 {
    margin-bottom: .45rem;
    color: #fff;
    font-size: 1.02rem;
    font-weight: 700;
    letter-spacing: -.005em;
}

.main-faq .setup-card p {
    flex: 1;
    color: var(--text-muted);
    font-size: .84rem;
    line-height: 1.75;
}

.main-faq .setup-card p strong {
    color: #4ee6c0;
    font-weight: 600;
}

.main-faq .setup-card .setup-tip {
    display: block;
    margin-top: .85rem;
    padding-top: .7rem;
    border-top: 1px dashed hsla(0, 0%, 100%, .07);
    color: var(--text-dim);
    font-size: .72rem;
    line-height: 1.6;
}


/* ============================================================
   06  故障排查
   ============================================================ */
.main-faq .troubleshoot-section {
    background: var(--bg-dark);
}

.main-faq .troubleshoot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
    max-width: 1200px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-faq .ts-card {
    display: flex;
    flex-direction: column;
    padding: 1.7rem 1.5rem 1.6rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: linear-gradient(165deg, rgba(15, 26, 48, .65), rgba(10, 17, 34, .45));
    transition: .3s;
}

.main-faq .ts-card:hover {
    border-color: rgba(79, 124, 255, .3);
    transform: translateY(-4px);
    box-shadow: 0 18px 44px rgba(0, 0, 0, .4);
}

.main-faq .ts-card .ts-head {
    display: flex;
    align-items: center;
    gap: .8rem;
    margin-bottom: 1rem;
    padding-bottom: .9rem;
    border-bottom: 1px solid var(--border);
}

.main-faq .ts-card .ts-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 6px 18px rgba(79, 124, 255, .3);
    color: #fff;
    font-size: .95rem;
    font-weight: 800;
    letter-spacing: -.02em;
}

.main-faq .ts-card h3 {
    color: #fff;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -.01em;
}

.main-faq .ts-card .ts-steps {
    display: grid;
    gap: .65rem;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: ts-step;
}

.main-faq .ts-card .ts-steps li {
    position: relative;
    padding-left: 1.8rem;
    color: var(--text-muted);
    font-size: .85rem;
    line-height: 1.75;
    counter-increment: ts-step;
}

.main-faq .ts-card .ts-steps li::before {
    content: counter(ts-step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: .1em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid rgba(79, 124, 255, .3);
    background: rgba(79, 124, 255, .1);
    color: var(--accent);
    font-size: .62rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.main-faq .ts-card .ts-steps li strong {
    color: #eaf0ff;
    font-weight: 600;
}


/* ============================================================
   07  常见问题（FAQ 卡片）
   ============================================================ */
.main-faq .faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    max-width: 1080px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
}

.main-faq .faq-card {
    padding: 1.3rem 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(10, 17, 34, .5);
    backdrop-filter: blur(6px);
    transition: .3s;
}

.main-faq .faq-card:hover {
    border-color: rgba(79, 124, 255, .3);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .4);
}

.main-faq .faq-card .faq-q {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-bottom: .5rem;
    color: #fff;
    font-size: clamp(.98rem, 1.05vw, 1.08rem);
    font-weight: 700;
    line-height: 1.4;
}

.main-faq .faq-card .faq-q i {
    flex-shrink: 0;
    width: 18px;
    color: var(--accent);
    font-size: .9rem;
    text-align: center;
}

.main-faq .faq-card .faq-a {
    padding-left: 1.75rem;
    color: var(--text-muted);
    font-size: .88rem;
    line-height: 1.8;
}

.main-faq .faq-card .faq-a p { margin: 0; }

.main-faq .faq-card .faq-a strong {
    color: #eaf0ff;
    font-weight: 600;
}

.main-faq .faq-card .faq-a code {
    display: inline-block;
    margin: 0 .15rem;
    padding: .05rem .4rem;
    border-radius: 4px;
    border: 1px solid hsla(0, 0%, 100%, .08);
    background: hsla(0, 0%, 100%, .05);
    color: #4ee6c0;
    font-family: "JetBrains Mono", "Fira Code", Menlo, monospace;
    font-size: .82em;
}


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

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

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

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

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

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

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


/* ============================================================
   09  响应式
   ============================================================ */

/* ---- 平板 ---- */
@media (max-width: 1024px) {
    .main-faq .setup-grid { grid-template-columns: repeat(2, 1fr); }
    .main-faq .troubleshoot-grid { grid-template-columns: 1fr; }
    .main-faq .ts-card .ts-steps { gap: .55rem; }
}

/* ---- 中小屏 ---- */
@media (max-width: 820px) {
    .main-faq .faq-hero {
        min-height: auto;
        padding: 3rem 1rem 2.5rem;
    }
    .main-faq .faq-hero h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); }
    .main-faq .faq-hero .faq-stats {
        flex-wrap: wrap;
        justify-content: center;
        padding: .55rem 1rem;
    }
    .main-faq .faq-nav { padding: 1.2rem .8rem; }
    .main-faq .faq-nav .nav-links { gap: .5rem .7rem; }
    .main-faq .faq-nav .nav-links a {
        padding: .35rem .9rem;
        font-size: .78rem;
    }
    .main-faq .faq-grid { grid-template-columns: 1fr; }
    .main-faq .setup-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- 手机 ---- */
@media (max-width: 600px) {
    .main-faq .setup-grid { grid-template-columns: 1fr; }
    .main-faq .faq-category { margin-bottom: 2rem; }
    .main-faq .faq-category .cat-title { font-size: 1.05rem; }
    .main-faq .faq-category .cat-title i {
        width: 30px;
        height: 30px;
        font-size: .9rem;
    }
    .main-faq .ts-card { padding: 1.4rem 1.2rem 1.3rem; }
    .main-faq .ts-card h3 { font-size: 1rem; }
    .main-faq .cta-section .cta-buttons { flex-direction: column; }
    .main-faq .cta-section .btn-cta {
        justify-content: center;
        width: 100%;
        max-width: 280px;
    }
}

/* ---- 极小屏 ---- */
@media (max-width: 480px) {
    .main-faq .faq-hero h1 { font-size: 1.6rem; }
    .main-faq .faq-hero .faq-stats .item { font-size: .75rem; }
    .main-faq .faq-item { padding: .95rem 1rem; }
    .main-faq .faq-item .q { font-size: .9rem; }
    .main-faq .faq-item .a { padding-left: .8rem; font-size: .82rem; }
    .main-faq .faq-card { padding: 1rem 1.1rem; }
    .main-faq .faq-card .faq-q { font-size: .9rem; }
    .main-faq .faq-card .faq-a { padding-left: 0; font-size: .82rem; }
    .main-faq .setup-card { padding: 1.3rem 1.1rem 1.2rem; }
    .main-faq .setup-card h4 { font-size: .95rem; }
    .main-faq .setup-card p { font-size: .8rem; }
    .main-faq .cta-section .cta-box { padding: 1.5rem 1rem; }
    .main-faq .cta-section .cta-box h3 { font-size: 1.15rem; }
}