/* V20-K 课程主题 → 课程层级 → 班期 → 咨询 公开路径样式（移动优先，无 JS 可用） */
.v20-steps{list-style:none;margin:24px 0 8px;padding:0;display:grid;gap:12px;counter-reset:step}
.v20-steps li{background:var(--panel,#fff);border:1px solid var(--line,#e3ded4);border-radius:14px;padding:14px 16px}
.v20-steps li span{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--muted,#6f6a5e);margin-bottom:4px}
.v20-steps li strong{display:block;font-size:16px;margin-bottom:4px}
.v20-steps li p{margin:0;font-size:14px;color:var(--muted,#6f6a5e)}
@media(min-width:900px){.v20-steps{grid-template-columns:repeat(5,1fr)}}

.v20-theme-grid{display:grid;gap:14px;margin-top:8px}
@media(min-width:720px){.v20-theme-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1180px){.v20-theme-grid{grid-template-columns:repeat(4,1fr)}}
.v20-theme-card{background:var(--panel,#fff);border:1px solid var(--line,#e3ded4);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:6px}
.v20-theme-card h2{margin:0;font-size:20px}
.v20-theme-card h2 a{color:inherit;text-decoration:none}
.v20-theme-card h2 a:hover{text-decoration:underline}
.v20-theme-card p{margin:0;font-size:14px}
.v20-theme-fact{color:var(--muted,#6f6a5e);font-size:13px!important}
.v20-theme-card .text-link{margin-top:auto}

.v20-backline{margin:4px 0 0;font-size:14px}
.v20-backline a{color:var(--accent,#8a5a2b);text-decoration:none}
.v20-backline a:hover{text-decoration:underline}

.v20-lane{margin:0 0 22px;border:1px solid var(--line,#e3ded4);border-radius:16px;background:var(--panel,#fff);padding:14px 16px}
.v20-lane h3{margin:0 0 10px;font-size:17px;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.v20-lane-index{font-size:12px;letter-spacing:.08em;color:var(--muted,#6f6a5e)}
.v20-lane-count{font-size:12px;font-weight:400;color:var(--muted,#6f6a5e)}
.v20-lane-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.v20-course{border-top:1px dashed var(--line,#e3ded4);padding:12px 0 4px;display:grid;gap:8px}
.v20-course:first-child{border-top:0;padding-top:0}
@media(min-width:900px){.v20-course{grid-template-columns:1fr 240px}}
.v20-course-line{margin:0;font-size:16px;display:flex;gap:8px;align-items:baseline;flex-wrap:wrap}
.v20-code{font-size:12px;letter-spacing:.06em;background:var(--tint,#f4efe6);border-radius:6px;padding:2px 8px;white-space:nowrap}
.v20-course-meta{margin:2px 0 0;font-size:12px;color:var(--muted,#6f6a5e)}
.v20-course-summary{margin:6px 0 0;font-size:14px}
.v20-prereq{margin:6px 0 0;font-size:13px}
.v20-prereq summary{cursor:pointer;color:var(--accent,#8a5a2b)}
.v20-prereq p{margin:6px 0 0;color:var(--muted,#6f6a5e)}
.v20-related{margin:6px 0 0;font-size:13px;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.v20-chip{display:inline-block;border:1px solid var(--line,#e3ded4);border-radius:999px;padding:1px 10px;font-size:12px;text-decoration:none;color:inherit}
.v20-chip:hover{border-color:var(--accent,#8a5a2b)}
.v20-course-side{border-left:0;padding-top:2px}
@media(min-width:900px){.v20-course-side{border-left:1px solid var(--line,#e3ded4);padding-left:14px}}
.v20-sessions{margin:0;font-size:13px}
.v20-sessions-none{color:var(--muted,#6f6a5e)}
.v20-course-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.v20-course[data-kind="study-group"] .v20-course-main{opacity:.94}

.v20-theme-sessions .v19-session-list{margin-top:4px}
.v20-next .actions{margin-top:8px}