/* ==========================================================================
   VPNPF — tutorial.css
   新手指引页(start.html)专属样式:页头、横向缓滚带、步骤正文列、平台导入块。
   颜色 / 字体 / 圆角一律引用 base.css 的 :root 令牌,组件内不写死设计值。
   ========================================================================== */

/* ---------- 1. 页头 ---------- */
.tut-hero { padding-top: 44px; padding-bottom: 30px; }
.tut-head { max-width: 880px; }
.tut-head h1 { margin-top: 14px; }
.tut-head .lead { margin-top: 16px; }
.tut-head .trust { margin-top: 22px; justify-content: flex-start; }

/* ---------- 2. 横向缓滚带(装饰层,aria-hidden;滚动由 motion.js 驱动) ---------- */
.ticker {
  overflow: hidden;
  max-width: 100%;
  padding: 12px 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}
.ticker-track { display: flex; align-items: center; width: max-content; }
.ticker-item {
  display: inline-flex; align-items: center; gap: 16px;
  padding-left: 16px;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.4;
  color: var(--text-muted); white-space: nowrap;
}
.ticker-item::after {
  content: ""; flex-shrink: 0;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent-light);
}
.ticker.is-static { overflow-x: auto; }

/* ---------- 3. 正文列 ---------- */
.tut { position: relative; }

.tut-callout { margin-top: 26px; max-width: 78ch; }
.tut-callout a,
.tut-note a { color: var(--accent-dark); border-bottom: 1px solid var(--border); }
.tut-callout a:hover,
.tut-note a:hover { border-bottom-color: var(--accent-dark); }

.tut-sec { padding-top: 36px; }
.tut-sec + .tut-sec { margin-top: 36px; border-top: 1px solid var(--border); }
.tut-sec > .tut-step { margin-top: 0; }
.tut-sec h2 { margin-top: 10px; }

.tut-step {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em;
  color: var(--accent-dark);
}
.tut-step::before { content: ""; width: 22px; height: 1px; background: var(--accent); }

.tut-cta { margin-top: 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.tut-cta .btn { flex-shrink: 0; white-space: nowrap; }

.tut-box { margin-top: 24px; }
.tut-box h3 { margin-top: 0; }
.tut-box ul { display: flex; flex-direction: column; gap: 9px; margin-top: 14px; }
.tut-box li { position: relative; padding-left: 20px; font-size: 14px; color: var(--text-muted); }
.tut-box li::before {
  content: ""; position: absolute; left: 4px; top: 8px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}

.tut-note {
  margin-top: 22px; padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 13.5px; color: var(--text-muted); max-width: 78ch;
}

.tut-table { margin-top: 20px; }

/* ---------- 4. 平台导入块 ---------- */
.plat-blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; margin-top: 24px; }
.plat-block { min-width: 0; padding: 20px 0; border-top: 1px solid var(--border); }
.plat-block h3 { margin-top: 0; }
.plat-block p { margin-top: 10px; font-size: 14px; }

/* ---------- 5. 响应式 ---------- */
@media (max-width: 768px) {
  .tut-hero { padding-top: 28px; padding-bottom: 22px; }
  .tut-sec { padding-top: 28px; }
  .tut-sec + .tut-sec { margin-top: 28px; }
  .plat-blocks { grid-template-columns: 1fr; gap: 0; }
}