.c15-page{color:#17294c;max-width:1180px;margin:0 auto;padding:24px 20px 72px}.c15-top{background:#fff;border-bottom:1px solid #dce7f5;justify-content:space-between;align-items:center;gap:16px;padding:20px 26px;display:flex}.c15-top a{color:#2363ba;font-weight:800;text-decoration:none}.c15-hero{background:#fff;border-radius:28px;grid-template-columns:1fr 1fr;margin:22px 0 16px;display:grid;overflow:hidden;box-shadow:0 18px 42px #1434631a}.c15-hero>div{padding:52px 40px}.c15-hero small,.c15-card small,.c15-close small{letter-spacing:.08em;color:#2d6cd0;font-weight:900}.c15-hero h1{letter-spacing:-.045em;margin:15px 0;font-size:clamp(2.35rem,4vw,4.35rem);line-height:1.06}.c15-hero p{font-size:1.1rem;line-height:1.55}.c15-hero aside{background:#e7f2ff;border-radius:15px;gap:6px;padding:15px;display:grid}.c15-hero img{object-fit:contain;object-position:center;background:#fff;width:100%;height:100%;min-height:420px}.c15-nav{background:#fff;border-radius:16px;grid-template-columns:repeat(4,1fr);gap:10px;padding:12px;display:grid;box-shadow:0 8px 22px #14346312}.c15-nav a{color:#2861ba;text-align:center;border:1px solid #cfe0f5;border-radius:10px;padding:11px;font-weight:800;text-decoration:none}.c15-card,.c15-close{background:#fff;border-radius:24px;margin-top:24px;padding:34px;box-shadow:0 12px 30px #14346312}.c15-card h2,.c15-close h2{letter-spacing:-.03em;margin:8px 0 12px;font-size:clamp(1.65rem,2.6vw,2.35rem)}.c15-card p,.c15-close p{line-height:1.55}.c15-concept{grid-template-columns:1.15fr .85fr;align-items:center;gap:28px;display:grid}.c15-concept>img{object-fit:contain;object-position:center;background:#fff;border-radius:18px;width:100%;height:100%;min-height:280px}.c15-rules{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px;display:grid}.c15-rules article{background:#eff7ff;border:1px solid #cfe0f5;border-radius:14px;gap:6px;padding:15px;display:grid}.c15-rules b{color:#2367c4;font-size:1.35rem}.c15-section-head{justify-content:space-between;align-items:start;gap:18px;display:flex}.c15-section-head strong{color:#215da7;white-space:nowrap;background:#e6f0ff;border-radius:12px;padding:10px 13px}.c15-line{border-top:4px solid #285fae;height:125px;margin:42px 30px 22px;position:relative}.c15-arrow{color:#285fae;font-size:2rem;font-weight:900;position:absolute;top:-16px}.c15-arrow.left{left:-22px}.c15-arrow.right{right:-22px}.c15-mark{justify-items:center;display:grid;position:absolute;top:-10px;transform:translate(-50%)}.c15-mark i{border-left:3px solid #285fae;height:20px}.c15-mark b{margin-top:8px;font-size:.86rem}.c15-point{color:#fff;border-radius:11px;place-items:center;min-width:44px;height:34px;display:grid;position:absolute;top:-38px;transform:translate(-50%);box-shadow:0 6px 14px #122d5533}.c15-point.orange{background:#de6c36}.c15-point.green{background:#208458}.c15-equation{justify-content:center;align-items:center;gap:32px;margin:12px 0;font-size:clamp(1.8rem,4vw,3.2rem);display:flex}.c15-equation span{color:#6d83a1}.c15-options{justify-content:center;gap:14px;margin:22px 0;display:flex}.c15-options button,.c15-actions button,.c15-order button{color:#2056a1;font:inherit;cursor:pointer;background:#fff;border:1px solid #9abbeb;border-radius:12px;font-weight:850}.c15-options button{min-width:86px;padding:12px;font-size:1.65rem}.c15-options .selected{background:#f5f9ff;outline:4px solid #d7e8ff}.c15-options .right{color:#135e39;background:#def4e6;border-color:#42a36c}.c15-options .wrong{color:#9d3528;background:#fff0ec;border-color:#e48a72}.c15-feedback{border-radius:12px;padding:13px 15px}.c15-feedback.good{color:#155b38;background:#e1f5e8}.c15-feedback.tip{color:#825a0d;background:#fff3dc}.c15-actions{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.c15-actions button{padding:12px 16px}.c15-actions .primary{color:#fff;background:#2764bf;border-color:#2764bf}.c15-actions .secondary{background:#fff}.c15-actions button:disabled{opacity:.5;cursor:not-allowed}.c15-team{grid-template-columns:1fr 1fr;align-items:center;gap:34px;display:grid}.c15-order{border:1px dashed #a6bfdf;border-radius:14px;flex-wrap:wrap;gap:10px;min-height:58px;margin-top:18px;padding:13px;display:flex}.c15-order button{padding:10px 13px}.c15-order button:not(.available){color:#195c3b;background:#dff4e8;border-color:#4ca879}.c15-order button span{margin-top:3px;font-size:.7rem;display:block}.c15-team-line{background:#edf6ff;border-radius:18px;padding:22px}.c15-team-line .c15-line{margin-top:48px}.c15-close{color:#fff;background:linear-gradient(135deg,#173b76,#2d74c8)}.c15-close small{color:#80d8ff}.c15-close div{background:#ffffff21;border-radius:12px;align-items:center;gap:14px;margin-top:18px;padding:13px;display:flex}.c15-close span{font-weight:850}@media (max-width:760px){.c15-top,.c15-section-head{flex-direction:column;align-items:start}.c15-hero,.c15-concept,.c15-team{grid-template-columns:1fr}.c15-hero>div{padding:35px 24px}.c15-hero img{min-height:250px}.c15-nav{grid-template-columns:1fr 1fr}.c15-card,.c15-close{padding:24px 18px}.c15-rules{grid-template-columns:1fr}.c15-line{margin-left:20px;margin-right:20px}.c15-mark b{font-size:.68rem}.c15-point{min-width:38px;font-size:.75rem}.c15-actions{flex-direction:column;align-items:stretch}.c15-actions button{width:100%}}