:root { --pi-accent: #3ab455; --pi-bg: #f7f8fb; --pi-border: #eceff3; --pi-text: #1f2430; --pi-muted: #6f7484; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--pi-bg); color: var(--pi-text); }
.scenario-page { padding: 18px 0 26px; }
.scenario-layout { max-width: 1240px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 18px; align-items: start; }
.scenario-sidebar, .scenario-content-card { background: #fff; border: 1px solid var(--pi-border); border-radius: 16px; }
.scenario-sidebar { height: calc(100vh - 116px); overflow-y: auto; }
.scenario-sidebar__head { padding: 22px 18px 14px; border-bottom: 1px solid #f0f2f6; }
.scenario-sidebar__title { margin: 0 0 10px; font-size: 22px; line-height: 1.2; font-weight: 700; }
.scenario-sidebar__desc { margin: 0; color: var(--pi-muted); font-size: 14px; line-height: 1.45; }
.scenario-tabs { padding: 0; }
.scenario-tab { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 30px 18px; margin: 0; border-radius: 0; border-left: 3px solid transparent; border-bottom: 1px solid #eef1f5; color: var(--pi-text); text-decoration: none; font-size: 16px; font-weight: 500; transition: background-color .18s ease, color .18s ease, border-color .18s ease; }
.scenario-tab:last-child { border-bottom-color: transparent; }
.scenario-tab:hover { background: #f3fbf5; color: var(--pi-accent); }
.scenario-tab.is-active { background: #eef9f1; border-left-color: var(--pi-accent); color: var(--pi-accent); }
.scenario-tab__arrow { width: 14px; height: 14px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; color: #9aa1b1; }
.scenario-tab:hover .scenario-tab__arrow, .scenario-tab.is-active .scenario-tab__arrow { color: var(--pi-accent); }
.scenario-content-card { height: calc(100vh - 116px); overflow-y: auto; padding: 26px 28px; }
.scenario-content__title { margin: 0 0 18px; color: var(--pi-accent); font-size: 22px; line-height: 1.2; font-weight: 700; }
.scenario-content__text { margin: 0 0 18px; color: #232838; font-size: 17px; line-height: 1.6; }
.scenario-content__subtitle { margin: 24px 0 10px; font-size: 20px; line-height: 1.3; color: #151515; font-weight: 700; }
.scenario-list { margin: 0 0 6px; padding-left: 0; list-style: none; }
.scenario-list li { position: relative; margin-bottom: 8px; padding-left: 14px; color: #232838; font-size: 17px; line-height: 1.5; }
.scenario-list li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 5px; height: 5px; border-radius: 50%; background: var(--pi-accent); transform: translateY(-50%); }
.scenario-nav { margin-top: 24px; padding-top: 18px; border-top: 1px solid #eef1f5; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.scenario-btn { min-height: 46px; padding: 0 18px; border-radius: 10px; border: 1px solid #dfe4eb; background: #fff; color: var(--pi-text); text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 15px; font-weight: 500; }
.scenario-btn--next { border-color: var(--pi-accent); background: var(--pi-accent); color: #fff; margin-left: auto; }
@media (max-width: 1100px) { .scenario-layout { grid-template-columns: 300px minmax(0, 1fr); } }
@media (max-width: 900px) { .scenario-layout { grid-template-columns: 1fr; } .scenario-sidebar, .scenario-content-card { height: auto; max-height: none; } .scenario-tabs { display: flex; gap: 8px; overflow-x: auto; padding: 10px; } .scenario-tab { min-width: 220px; border-left-width: 0; border-bottom: 2px solid transparent; } .scenario-tab.is-active { border-bottom-color: var(--pi-accent); } .scenario-content__title { font-size: 22px; } }
@media (max-width: 640px) { .scenario-layout { padding-left: 14px; padding-right: 14px; } .scenario-page { padding: 10px 0 18px; } .scenario-sidebar__title { font-size: 22px; } .scenario-sidebar__desc, .scenario-tab { font-size: 14px; } .scenario-content-card { padding: 16px; } .scenario-content__title { font-size: 20px; } .scenario-content__text, .scenario-list li { font-size: 15px; } .scenario-content__subtitle { font-size: 18px; } .scenario-nav { flex-direction: column; align-items: stretch; } .scenario-btn, .scenario-btn--next { width: 100%; margin-left: 0; } }