:root{--brand:#ff7a00;--brand-hover:#ff922e;--brand-pressed:#db6500;--brand-soft:#fff1e5;--brand-deep:#a84c00;--surface-page:#f7f8fa;--surface-card:#ffffff;--surface-muted:#f1f3f5;--border:#e2e6ea;--border-strong:#bcc5ce;--text:#1f2933;--text-secondary:#5f6b76;--text-muted:#87919b;--success:#178a52;--success-soft:#eaf7f0;--warning:#b77900;--warning-soft:#fff4d6;--danger:#c0352b;--danger-soft:#fff0ee;--focus:rgba(255,122,0,.2);--gradient-1:linear-gradient(135deg,#ff7a00,#ffab45);--gradient-2:linear-gradient(135deg,#e85e00,#ff8b3d);--gradient-3:linear-gradient(135deg,#ff8a00,#ffc04d);--gradient-4:linear-gradient(135deg,#d95200,#ff7a00);--cover-pattern:radial-gradient(circle at 82% 20%,rgba(255,255,255,.28) 0 8%,transparent 9%),radial-gradient(circle at 18% 78%,rgba(255,255,255,.18) 0 14%,transparent 15%);--surface-glass:rgba(255,255,255,.9);--radius-card:16px;--radius-control:9px;--radius-tag:6px;--shadow-card:0 6px 24px rgba(31,41,51,.07);--shadow-hover:0 12px 32px rgba(31,41,51,.12);--font-display:30px;--font-title:18px;--font-body:15px;--font-caption:13px;--font-small:12px;--font-table:14px;--font-badge:22px;--font-run-title:24px;--font-empty-icon:42px;--font-mobile-title:25px;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--course-page-max:1240px;--course-page-pad:28px;--course-page-pad-mobile:12px;--course-header-gap:6px;--course-title-size:28px;--course-subtitle-size:14px;--course-tab-height:36px;--course-tab-pad-x:15px;--course-tab-gap:6px;--course-grid-cols:4;--course-grid-gap-x:18px;--course-grid-gap-y:24px;--course-cover-ratio:1.6;--course-card-radius:10px;--course-card-border:#e7e9ec;--course-card-shadow:0 2px 10px rgba(31,41,51,.05);--course-card-shadow-hover:0 8px 22px rgba(31,41,51,.1);--course-card-rise:-2px;--course-card-body-pad:13px;--course-card-title-size:16px;--course-card-title-line:1.45;--course-card-desc-size:12px;--course-card-desc-line:1.55;--course-cover-title-size:20px;--course-cover-label-size:11px;--course-cover-pad:16px;--course-cover-text:#ffffff;--course-cover-muted:rgba(255,255,255,.72);--course-cover-1:linear-gradient(135deg,#a64500,#ff7a00);--course-cover-2:linear-gradient(135deg,#c65300,#ff9838);--course-cover-3:linear-gradient(135deg,#7c3200,#ee6900);--course-tag-bg:#fff3e8;--course-tag-text:#d65d00;--course-meta-gap:8px;--course-mobile-cols:2;--course-mobile-title-size:14px;--course-mobile-cover-title-size:16px;--course-search-width:240px;--course-detail-gap:30px;--course-detail-cover-width:48%;--course-detail-hero-pad:30px;--course-detail-cover-radius:14px;--course-detail-cover-title:34px;--course-detail-summary-title:30px;--course-detail-section-gap:22px;--course-detail-catalog-width:1.12fr;--course-detail-intro-width:.88fr;--course-detail-panel-pad:24px;--course-detail-lesson-height:62px;--course-detail-soft:#fff8f1;--course-detail-line:#ebe7e2;--course-detail-lock:#9a948d;--player-bg:#171717;--player-panel:#222222;--player-panel-soft:#2b2b2b;--player-text:#f8f8f8;--player-muted:#a8a8a8;--player-border:#373737;--player-sidebar-width:360px;--player-topbar-height:68px;--player-screen-ratio:1.7778;--player-watermark-opacity:.42;--player-control-height:52px;--player-directory-row:58px;--course-admin-category-width:320px;--course-admin-panel-pad:20px;--course-admin-panel-radius:14px;--course-admin-summary-bg:#fff7ef;--course-admin-editor-width:1100px;--course-admin-editor-bg:#f7f8fa;--course-admin-preview-width:210px;--course-admin-danger:#b42318;--course-admin-danger-soft:#fff1f0}