:root{--background:#F1F3F1;--paper:#FBFCFA;--surface:#fff;--surface-soft:#E9EEEB;--pine:#234B43;--pine-deep:#17372F;--pine-light:#38685C;--electric:#36AFA5;--electric-deep:#237E78;--electric-soft:#DFF3F0;--amber:#C88A45;--amber-deep:#A66C2D;--amber-soft:#F7EDDF;--silver:#AAB5B3;--silver-soft:#E4E9E6;--ice:#DDEBF0;--ice-deep:#608A9B;--graphite:#252E30;--graphite-deep:#151D20;--title:#273432;--body:#485651;--muted:#75817C;--border:#DCE4DF;--divider:#E9EEEA;--player-bg:#080D0E;--player-text:#F8FAF9;--shadow:0 18px 50px rgba(27,55,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--background);color:var(--title);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.wrap{width:min(1360px,calc(100% - 64px));margin-inline:auto}.topbar{height:76px;background:rgba(251,252,250,.96);border-bottom:1px solid 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/* 17c content atlas - editorial additions; original color system retained */
.idea-heading{margin:54px 0 22px;padding-top:28px;border-top:1px solid var(--border)}
.idea-heading h2{font-size:clamp(25px,3vw,34px);margin:8px 0}
.idea-heading>p{max-width:760px;color:var(--muted);line-height:1.85}
.idea-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.idea-card{background:var(--paper);border:1px solid var(--border);border-radius:16px;padding:22px;display:flex;flex-direction:column;min-height:250px}
.idea-top{display:flex;justify-content:space-between;gap:12px;color:var(--pine);font-size:13px;font-weight:700}
.idea-top small{color:var(--muted);font-weight:500}
.idea-card h3{font-size:20px;line-height:1.45;margin:20px 0 9px;color:var(--title)}
.idea-card>p{color:var(--body);line-height:1.8;margin:0 0 16px}
.idea-angle{padding:12px 14px;background:var(--surface-soft);border-radius:10px;color:var(--body);font-size:13px;line-height:1.7;margin-top:auto}
.idea-angle b{display:block;color:var(--pine);margin-bottom:3px}
.idea-state{align-self:flex-start;margin-top:13px;padding:5px 9px;border-radius:20px;background:var(--amber-soft);color:var(--amber-deep);font-size:12px}
.filter-tip,.schedule-intro>div,.collection-method{padding:18px;background:var(--surface-soft);border-radius:14px;margin-top:18px}
.filter-tip p,.schedule-intro p{font-size:13px;line-height:1.7;color:var(--muted);margin:7px 0 0}
.schedule-intro{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0}
.collection-method{margin:26px 0}
.collection-method h3{margin-top:0}
.collection-method ul{padding-left:20px;color:var(--body);line-height:1.9}
@media(max-width:700px){.idea-grid,.schedule-intro{grid-template-columns:1fr}.idea-card{padding:18px}.idea-card h3{font-size:18px}}