/* =====================================================
   Tutorial / Docs Page — 羊皮纸主题 · 侧边栏布局
   依赖 style.css 提供 CSS 变量与基础样式
   ===================================================== */

/* ── 复用 download.css 中的公共组件 ────────────────
   .page-intro / .page-intro__* / .dl-layout /
   .dl-sidebar / .dl-nav / .dl-nav__* / .dl-content
   以上类已在 download.css 中定义，此文件不重复声明
   ───────────────────────────────────────────────── */

/* ── 平台区块头部 ───────────────────────────────── */
.docs-platform-head {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding-bottom: 22px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.docs-platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    flex-shrink: 0;
}

.docs-platform-icon--win     { background: rgba(0,120,212,0.1);  color: #0078d4; }
.docs-platform-icon--mac     { background: rgba(50,50,50,0.08);  color: #3a332a; }
.docs-platform-icon--android { background: rgba(61,220,132,0.12); color: #3ddc84; }
.docs-platform-icon--ios     { background: rgba(90,90,90,0.08);  color: #555; }
.docs-platform-icon--linux   { background: rgba(255,198,0,0.12); color: #c9a000; }
.docs-platform-icon--start   { background: rgba(140,74,59,0.1);  color: var(--accent-secondary); }

.docs-platform-head h2 {
    font-family: var(--font-serif);
    font-size: 1.7rem;
    margin-bottom: 5px;
    color: var(--text-main);
}

.docs-platform-head p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ── 快速开始卡片流（竖排横向卡片） ────────────── */
.qs-flow {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.qs-card {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 0 24px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 22px 24px;
    background: rgba(255,255,255,0.4);
    transition: var(--transition);
    align-items: start;
}

.qs-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* 左侧：编号 + 图标 */
.qs-card-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding-top: 4px;
}

.qs-card-num {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: rgba(59,90,74,0.15);
    line-height: 1;
}

.qs-card-icon {
    font-size: 1.4rem;
    color: var(--accent-primary);
}

/* 右侧：内容 */
.qs-card-body h3 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.qs-card-body > p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 12px;
}

.qs-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.qs-list li {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 0 8px;
    align-items: baseline;
    font-size: 0.86rem;
}

.qs-list-name {
    display: flex;
    align-items: center;
    gap: 7px;
    white-space: nowrap;
    color: var(--text-main);
    font-weight: 500;
}

.qs-list-name i {
    width: 16px;
    text-align: center;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.qs-list-desc {
    color: var(--text-muted);
    line-height: 1.5;
}

.qs-code-block {
    background: rgba(59,90,74,0.05);
    border: 1px solid rgba(59,90,74,0.15);
    border-radius: 6px;
    padding: 12px 14px;
    margin-bottom: 10px;
}

.qs-code-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 6px;
}

.qs-code-block code {
    font-size: 0.78rem;
    color: var(--accent-primary);
    word-break: break-all;
    font-family: 'Courier New', monospace;
}

.qs-tip {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

.qs-tip i { color: var(--accent-primary); flex-shrink: 0; margin-top: 2px; }
.qs-tip code {
    background: rgba(59,90,74,0.08);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.82rem;
    color: var(--accent-primary);
}

.qs-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.84rem;
    color: var(--accent-primary);
    font-weight: 500;
    transition: gap 0.2s;
    margin-top: 6px;
}

.qs-card-link:hover { gap: 9px; color: var(--accent-hover); }

/* 箭头分隔（竖排时不需要，隐藏） */
.qs-arrow { display: none; }

/* ── 推荐客户端速览表 ───────────────────────────── */
.client-overview {
    border: 1px dashed var(--accent-primary);
    border-radius: 10px;
    padding: 22px 24px;
    background: rgba(59,90,74,0.03);
    margin-bottom: 0;
}

.client-overview-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.client-overview-head i { color: var(--accent-primary); }

.client-overview-head h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--text-main);
}

.client-overview-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.cov-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 12px;
    text-align: center;
    background: rgba(255,255,255,0.4);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cov-item--primary { border-color: var(--accent-primary); }

.cov-platform {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.cov-platform i { font-size: 1.2rem; color: var(--accent-primary); }

.cov-client {
    font-family: var(--font-serif);
    font-size: 0.82rem;
    color: var(--text-main);
    font-weight: 700;
}

.cov-badge {
    font-size: 0.7rem;
    color: var(--accent-primary);
    background: rgba(59,90,74,0.1);
    padding: 2px 7px;
    border-radius: 10px;
    align-self: center;
}

/* ── 平台区块容器 ───────────────────────────────── */
.docs-section {
    margin-bottom: 72px;
    padding-top: 8px;
}

/* ── 教程步骤 ───────────────────────────────────── */
.tut-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
}

.tut-steps::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--border-color) 0%, transparent 100%);
    z-index: 0;
}

.tut-step {
    display: flex;
    gap: 20px;
    padding-bottom: 32px;
    position: relative;
    z-index: 1;
}

.tut-step:last-child { padding-bottom: 0; }

.tut-step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-primary);
    color: #fff;
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 0 4px var(--bg-parchment);
}

.tut-step-body {
    flex: 1;
    min-width: 0;
    padding-top: 8px;
}

.tut-step-body h3 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--text-main);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tut-step-body h3 i { color: var(--accent-primary); font-size: 0.95rem; }

.tut-step-body > p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 14px;
}

/* ── 迷你步骤列表 ───────────────────────────────── */
.tut-mini-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.tut-mini-step {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.86rem;
    color: var(--text-muted);
    line-height: 1.55;
}

.tut-mini-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-parchment-dark);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--accent-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.tut-mini-step code {
    background: rgba(59,90,74,0.08);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.82rem;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
}

.tut-mini-step strong { color: var(--text-main); }

/* ── 提示框 ─────────────────────────────────────── */
.tut-tip {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 7px;
    font-size: 0.86rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin-bottom: 0;
    background: rgba(59,90,74,0.05);
    border: 1px solid rgba(59,90,74,0.15);
}

.tut-tip > i { color: var(--accent-primary); flex-shrink: 0; margin-top: 2px; }
.tut-tip--success { background: rgba(61,220,132,0.06); border-color: rgba(61,220,132,0.2); }
.tut-tip--success > i { color: #28a060; }
.tut-tip strong { color: var(--text-main); }
.tut-tip code {
    background: rgba(59,90,74,0.1);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.82rem;
    color: var(--accent-primary);
}

.tut-warn {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 7px;
    font-size: 0.86rem;
    line-height: 1.65;
    color: var(--text-muted);
    background: rgba(180,120,30,0.06);
    border: 1px solid rgba(180,120,30,0.22);
}

.tut-warn > i { color: #b07020; flex-shrink: 0; margin-top: 2px; }
.tut-warn strong { color: var(--text-main); }
.tut-warn code {
    background: rgba(180,120,30,0.1);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.82rem;
    color: #8a5800;
}

/* ── 下载按钮行 ─────────────────────────────────── */
.tut-dl-row {
    margin: 12px 0;
}

.tut-dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--accent-primary);
    color: #fff;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
}

.tut-dl-btn:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

/* ── 架构选择卡片 ───────────────────────────────── */
.arch-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 14px;
}

.arch-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 18px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: rgba(255,255,255,0.4);
    transition: var(--transition);
}

.arch-card--primary { border-color: var(--accent-primary); background: rgba(59,90,74,0.04); }

.arch-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.arch-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.arch-info strong {
    font-size: 0.9rem;
    color: var(--text-main);
    font-family: var(--font-serif);
}

.arch-info span {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.arch-info em {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-style: normal;
    opacity: 0.8;
}

.arch-info code {
    background: rgba(59,90,74,0.08);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.78rem;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
}

/* ── 终端块 ─────────────────────────────────────── */
.tut-terminal {
    border-radius: 8px;
    overflow: hidden;
    background: #1e1a16;
    border: 1px solid #3a332a;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    margin-top: 14px;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 14px;
    background: #2b2722;
    border-bottom: 1px solid #3a332a;
}

.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot--red    { background: #ff5f57; }
.terminal-dot--yellow { background: #febc2e; }
.terminal-dot--green  { background: #28c840; }

.terminal-title {
    font-size: 0.75rem;
    color: #8c8273;
    margin-left: 4px;
    font-family: var(--font-sans);
}

.terminal-body {
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.terminal-line { display: flex; gap: 8px; align-items: baseline; }
.terminal-line--gap { margin-top: 8px; }
.terminal-line--output {}
.terminal-line--success {}

.t-prompt { color: #3ddc84; font-weight: 700; flex-shrink: 0; }
.t-comment { color: #6b6255; font-style: italic; }
.t-cmd { color: #b0d4ff; }
.t-arg { color: #d1c7b3; }
.t-output { color: #8c8273; }
.terminal-line--success .t-output { color: #3ddc84; }

/* ── iOS 通知横幅 ───────────────────────────────── */
.tut-ios-notice {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 20px;
    background: rgba(180,120,30,0.07);
    border: 1px solid rgba(180,120,30,0.25);
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-muted);
}

.tut-ios-notice > i { font-size: 1.3rem; color: #b07020; flex-shrink: 0; margin-top: 2px; }
.tut-ios-notice strong { color: var(--text-main); display: block; margin-bottom: 4px; }

/* ── iOS App 按钮 ───────────────────────────────── */
.tut-ios-apps {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.tut-ios-app-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: rgba(255,255,255,0.5);
    transition: var(--transition);
}

.tut-ios-app-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.tut-ios-app-btn > i { font-size: 1.6rem; color: var(--text-main); }

.tut-ios-app-btn > div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tut-ios-app-btn strong { font-size: 0.9rem; color: var(--text-main); }
.tut-ios-app-btn span { font-size: 0.78rem; color: var(--text-muted); }

/* ── 进阶用户提示块 ─────────────────────────────── */
.tut-alt-block {
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 18px 20px;
    background: rgba(249,245,235,0.5);
    margin-top: 10px;
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.tut-alt-block-head {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}

.tut-alt-block-head i { color: var(--accent-secondary); }
.tut-alt-block a { color: var(--accent-primary); text-decoration: underline; }

/* ── 区块底部 GitHub 链接 ───────────────────────── */
.docs-section-foot {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding-top: 16px;
    border-top: 1px dashed var(--border-color);
    margin-top: 28px;
}

.gh-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
    transition: color 0.2s;
}

.gh-link:hover { color: var(--accent-primary); }
.gh-link--dead { color: #c0b0a0; cursor: default; font-style: italic; }

/* ── FAQ（全宽双列） ────────────────────────────── */
.docs-faq {
    padding: 48px 24px 64px;
    background: var(--bg-parchment-dark);
    border-top: 1px solid var(--border-color);
}

.docs-faq__inner {
    max-width: 1200px;
    margin: 0 auto;
}

.docs-faq h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 8px;
}

.docs-faq__sub {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-bottom: 34px;
}

.docs-faq-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.docs-faq-card {
    background: var(--bg-parchment);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.docs-faq-card summary {
    padding: 16px 20px;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    font-family: var(--font-serif);
    font-size: 0.93rem;
}

.docs-faq-card summary::-webkit-details-marker { display: none; }

.docs-faq-chevron {
    color: var(--accent-primary);
    font-size: 0.8rem;
    flex-shrink: 0;
    transition: transform 0.25s;
}

.docs-faq-card[open] .docs-faq-chevron { transform: rotate(180deg); }

.docs-faq-body {
    padding: 0 20px 16px;
    border-top: 1px dashed var(--border-color);
    padding-top: 14px;
}

.docs-faq-body p {
    font-size: 0.87rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 8px;
}

.docs-faq-body p:last-child { margin: 0; }

.docs-faq-body code {
    background: rgba(59,90,74,0.08);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.83rem;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
}

.docs-faq-body strong { color: var(--text-main); }

.docs-faq-body .inline-code-block {
    background: rgba(30,26,22,0.9);
    color: #d1c7b3;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    padding: 10px 14px;
    border-radius: 6px;
    margin-top: 8px;
    overflow-x: auto;
}

.docs-faq-cta {
    text-align: center;
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.docs-faq-cta p { color: var(--text-muted); font-size: 0.92rem; }

/* ── 尾部 CTA ───────────────────────────────────── */
.docs-cta {
    background: var(--accent-primary);
    padding: 60px 24px;
    text-align: center;
}

.docs-cta h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: #fff;
    margin-bottom: 12px;
}

.docs-cta p {
    color: rgba(255,255,255,0.8);
    font-size: 0.95rem;
    margin-bottom: 28px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.docs-cta__btns {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.btn-cta-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: #fff;
    color: var(--accent-primary);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-cta-white:hover { background: var(--bg-parchment); color: var(--accent-primary); }

.btn-cta-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 2px solid rgba(255,255,255,0.6);
    color: #fff;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn-cta-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.docs-cta__platforms {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.docs-cta__platforms span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

/* ── 响应式 ─────────────────────────────────────── */
@media (max-width: 900px) {
    .qs-card {
        grid-template-columns: 52px 1fr;
        gap: 0 14px;
    }

    /* qs-list 在中等屏幕收窄名称列 */
    .qs-list li { grid-template-columns: 110px 1fr; }

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

    .arch-cards { grid-template-columns: 1fr; }

    .docs-faq-grid { gap: 6px; }

    .tut-steps::before { display: none; }

    /* 教程终端滚动 */
    .tut-terminal { overflow-x: auto; }
}

@media (max-width: 768px) {
    /* docs 页 hero */
    .docs-platform-head { padding: 28px 16px 24px; }
    .docs-platform-head h2 { font-size: 1.6rem; }

    /* qs-list 改为两行堆叠，彻底消除横向溢出风险 */
    .qs-list li {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .qs-list-name { white-space: normal; }

    /* qs-card 极窄屏优化 */
    .qs-card { padding: 16px; }
    .qs-card-body h3 { font-size: 1rem; }

    /* 教程步骤 */
    .tut-steps { gap: 24px; }
}

@media (max-width: 600px) {
    .client-overview-grid { grid-template-columns: repeat(2, 1fr); }
    .tut-ios-apps { flex-direction: column; }

    /* 终端代码块横向可滚动 */
    .tut-terminal pre, .tut-terminal code { min-width: max-content; }

    /* 文档 FAQ 卡片 */
    .docs-faq-card summary { font-size: 0.9rem; padding: 13px 14px; }
}

@media (max-width: 400px) {
    .client-overview-grid { grid-template-columns: repeat(2, 1fr); }
    .docs-platform-head h2 { font-size: 1.3rem; }
}