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2px 12px rgba(15,23,42,0.08);--shadow-glow:0 0 24px rgba(26,114,196,0.15);--code-bg:#f0f3f8;--code-inline-bg:rgba(26,114,196,0.08);--table-header-bg:#eef2f7;--table-row-alt:#f7f9fc;--tag-bg:rgba(26,114,196,0.08);--tag-border:rgba(26,114,196,0.2);--answer-color:#d7322a;--bg:var(--bg-primary);--surface:var(--bg-card);--surface-2:var(--bg-secondary);--surface-3:#f7f9fc;--line:var(--border-color);--line-strong:var(--border-light);--text:var(--text-primary);--muted:var(--text-muted);--subtle:#8899aa;--accent-soft:rgba(26,114,196,0.1);--success:#1f9d55;--success-soft:rgba(31,157,85,0.1);--warning:#b7791f;--warning-soft:rgba(183,121,31,0.1);--danger:#c0392b;--danger-soft:rgba(192,57,43,0.1)}body,html{background:var(--bg-primary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Source Han Sans SC,Noto Sans CJK 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1.4rem;border:none;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));font-weight:600;box-shadow:var(--shadow-card)}.button,.button:hover{color:var(--bg-primary)}.button:hover{box-shadow:var(--shadow-glow);transform:translateY(-1px)}.button-secondary{border:1.5px solid var(--border-light);background:rgba(127,127,127,.03);color:var(--text-primary);box-shadow:none}.button-secondary:hover{border-color:var(--accent);background:var(--tag-bg);color:var(--accent)}.section-heading h2{font-size:1.2rem}.dashboard-section{margin-bottom:2rem}.hero{text-align:center;padding:4rem 1.25rem 2.5rem;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center}.hero-content{max-width:860px}.hero-title{font-size:clamp(2.2rem,6vw,4.2rem);font-weight:900;line-height:1.1;letter-spacing:-.03em;margin:0 0 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.subject-card-icon{color:var(--color-os)}.subject-card.cn .subject-card-icon{color:var(--color-cn)}.exam-paper-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:.75rem;gap:.75rem}.exam-paper-card{display:block;padding:1rem 1.25rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-card);text-decoration:none;color:var(--text-primary);transition:all .25s}.exam-paper-card:hover{border-color:var(--accent);box-shadow:var(--shadow-glow);transform:translateY(-1px);color:var(--text-primary)}.exam-paper-card .title{font-weight:700;margin-bottom:.4rem}.exam-paper-card .meta{display:flex;flex-wrap:wrap;gap:.5rem;font-size:.82rem;color:var(--text-muted)}@media (max-width:900px){.site-header-inner{flex-wrap:wrap;padding-top:.5rem;padding-bottom:.5rem}.site-nav{display:none;order:3;width:100%;margin-left:0;flex-direction:column;align-items:stretch;gap:.25rem;padding:.75rem 0 .25rem}.site-nav.open{display:flex}.site-nav a{min-height:40px;padding:.5rem .75rem}.navbar-toggle{display:inline-flex}.navbar-right{margin-left:auto}.hero{padding:3rem 1rem 1.5rem}.hero-cards,.subject-grid{grid-template-columns:1fr}}