:root{--bg:#0C100E;--deep:#080A09;--surface:#141A16;--surface2:#1A2420;--title:#E8F6EE;--text:#CDE3D6;--muted:#8FB3A0;--faint:#6E8F7E;--green:#2A9D5C;--bright:#3CB371;--darkgreen:#146B3A;--sand:#EFE6D2;--border:rgba(42,157,92,.18);--border-strong:rgba(42,157,92,.45);--shadow:0 12px 28px rgba(8,10,9,.35)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}img{display:block;max-width:100%}.shell{width:min(960px,calc(100% - 32px));margin:0 auto}.site-head{position:fixed;top:0;left:0;right:0;z-index:60}.top-strip{height:20px;background:#070908;color:var(--bright);font-size:12px}.strip-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-button,.menu-button,.close-button{border:0;background:transparent;color:inherit;cursor:pointer}.text-button{color:var(--bright);padding:0 4px}.brand-row{height:54px;background:#090D0B;border-bottom:1px solid var(--border-strong)}.brand-inner{height:54px;display:flex;align-items:center;justify-content:space-between;gap:14px}.brand-link{min-height:44px;display:flex;align-items:center}.brand-logo,.footer-logo,.panel-logo{height:24px;width:auto;object-fit:contain}.brand-text{font-size:16px;font-weight:800;color:var(--title)}.brand-actions{display:flex;gap:8px;align-items:center}.head-link,.menu-button{height:44px;display:inline-flex;align-items:center;padding:0 14px;border:1px solid var(--border-strong);border-radius:10px;color:var(--text);background:#0D1310}.head-link{color:#08110C;background:linear-gradient(135deg,var(--bright) 0%,var(--green) 55%,var(--darkgreen) 100%);font-weight:800}.primary-tabs{height:44px;background:#0A0E0C;border-bottom:1px solid var(--border)}.tab-inner{height:44px;display:flex;align-items:center;gap:12px}.tab-link{width:88px;height:22px;display:flex;align-items:center;justify-content:center;border:1px solid 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var(--border);border-radius:10px;padding:18px;box-shadow:var(--shadow)}.muted{color:var(--muted)}.meta{color:var(--faint);font-size:13px}.media-slot{width:100%;height:168px;border:1px solid var(--border);background:#080B09;border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-176{height:176px}.slot-160{height:160px}.slot-200{height:200px}.two-narrow{display:grid;grid-template-columns:1fr 1fr;gap:16px}.two-narrow .card{min-width:0}.stack{display:grid;gap:14px}.feature-row{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:16px;align-items:start}.feature-row.reverse{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}.feature-row.reverse .media-slot{order:2}.feature-row.reverse .card{order:1}.lesson-list,.sound-list,.status-list,.article-list,.policy-list,.faq-list{display:grid;gap:12px}.line-item{background:var(--surface);border-left:3px solid 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