.tutorial-page { background: radial-gradient(circle at 80% 0, rgba(24,216,135,.08), transparent 25%), var(--bg); }
.tutorial-topbar { position: sticky; top: 0; z-index: 10; height: 68px; display: flex; align-items: center; justify-content: space-between; padding: 0 clamp(20px, 5vw, 70px); background: rgba(9,13,20,.9); border-bottom: 3px solid var(--green); backdrop-filter: blur(16px); }
.tutorial-brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-size: 18px; }
.tutorial-brand .brand-mark { width: 34px; height: 34px; border-radius: 10px; }
.back-link { padding: 9px 13px; color: var(--green); border: 1px solid rgba(24,216,135,.25); border-radius: 9px; text-decoration: none; font-size: 12px; font-weight: 700; }
.tutorial-shell { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 245px minmax(0, 1fr); gap: clamp(30px, 6vw, 90px); padding: 55px clamp(20px, 5vw, 70px) 100px; }
.tutorial-nav { position: sticky; top: 110px; align-self: start; }
.tutorial-nav h1 { margin: 7px 0 24px; font-size: 25px; }
.tutorial-nav nav { display: grid; gap: 4px; border-left: 1px solid var(--line); }
.tutorial-nav a { padding: 9px 15px; color: var(--muted); border-left: 2px solid transparent; text-decoration: none; font-size: 12px; }
.tutorial-nav a:hover, .tutorial-nav a.active { color: var(--text); border-left-color: var(--green); }
.tutorial-content { min-width: 0; padding: 0; }
.tutorial-hero { padding: clamp(28px, 5vw, 58px); background: linear-gradient(145deg, #151d29, #101620); border: 1px solid var(--line); border-radius: 27px; }
.tutorial-hero h2 { max-width: 660px; margin: 10px 0 15px; font-size: clamp(32px, 5vw, 55px); line-height: 1.04; letter-spacing: -.055em; }
.tutorial-hero > p { max-width: 620px; color: var(--muted); line-height: 1.65; }
.quick-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 35px; }
.quick-steps article { padding: 17px; background: #0c121b; border: 1px solid var(--line); border-radius: 14px; }
.quick-steps article > span { width: 28px; height: 28px; display: grid; place-items: center; margin-bottom: 15px; color: #04130d; background: var(--green); border-radius: 8px; font-size: 11px; font-weight: 800; }
.quick-steps strong { display: block; font-size: 12px; }
.quick-steps p { margin: 5px 0 0; color: var(--muted); font-size: 10px; line-height: 1.5; }
.guide-section { scroll-margin-top: 95px; display: grid; grid-template-columns: 58px minmax(0,1fr); gap: 22px; padding: 48px 8px; border-bottom: 1px solid var(--line); }
.guide-icon { width: 52px; height: 52px; display: grid; place-items: center; color: var(--green); background: rgba(24,216,135,.1); border-radius: 15px; font-size: 21px; }
.guide-section h2 { margin: 8px 0 12px; font-size: 25px; letter-spacing: -.03em; }
.guide-section p, .guide-section li { color: #9ca6b6; font-size: 14px; line-height: 1.75; }
.guide-section b { color: var(--text); }
.guide-section ul { padding-left: 18px; }
.tip { margin-top: 20px; padding: 15px; color: #b9c5d4; background: rgba(24,216,135,.07); border-left: 3px solid var(--green); border-radius: 0 10px 10px 0; font-size: 12px; }
.tip strong { color: var(--green); margin-right: 7px; }
.example-tree { width: min(340px, 100%); display: grid; gap: 6px; margin: 18px 0; padding: 17px; color: #c8d1dc; background: #0c121b; border: 1px solid var(--line); border-radius: 12px; font: 12px/1.5 monospace; }
.tutorial-footer { display: flex; align-items: center; gap: 15px; padding-top: 35px; color: var(--muted); font-size: 12px; }
.tutorial-footer a { margin-left: auto; color: var(--green); text-decoration: none; font-weight: 700; }

@media (max-width: 760px) {
  .tutorial-shell { display: block; padding-top: 30px; }
  .tutorial-nav { position: static; margin-bottom: 25px; }
  .tutorial-nav nav { grid-template-columns: 1fr 1fr; border: 0; }
  .tutorial-nav a { border-left: 0; border-bottom: 1px solid var(--line); }
  .quick-steps { grid-template-columns: 1fr; }
  .guide-section { grid-template-columns: 45px minmax(0,1fr); gap: 14px; }
  .guide-icon { width: 42px; height: 42px; }
  .tutorial-footer { align-items: flex-start; flex-direction: column; }
  .tutorial-footer a { margin-left: 0; }
}