/* ===== 主题系统 ===== */
[data-theme="warm"]{--c50:#fff7ed;--c200:#fed7aa;--c400:#fb923c;--c500:#f97316;--bg1:#fef9f2;--bg2:#f5eee6;--txt:#2d1f0e;--txt2:#7c6a5a;--txt3:#b09e8e;--card:rgba(255,255,255,0.85);--border:rgba(253,186,116,0.10);--font-d:'DM Sans','Noto Sans SC',sans-serif;--font-b:'DM Sans','Noto Sans SC',sans-serif;--r1:8px;--r2:12px;--r3:16px;--accent:#fb923c;--side-bg:#fef9f2;--side-hover:#ffedd5;--side-active:#fb923c;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
[data-theme="cool"]{--c50:#e8f0fa;--c200:#b8d6f5;--c400:#4b8fd9;--c500:#2563ab;--bg1:#f0f5fe;--bg2:#e8edf5;--txt:#0b1a33;--txt2:#4a5b75;--txt3:#8a9bb0;--card:rgba(255,255,255,0.88);--border:rgba(37,99,171,0.06);--font-d:'Space Grotesk','Noto Sans SC',sans-serif;--font-b:'IBM Plex Sans','Noto Sans SC',sans-serif;--r1:6px;--r2:8px;--r3:12px;--accent:#2563ab;--side-bg:#f0f5fe;--side-hover:#dbeafe;--side-active:#2563ab;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
[data-theme="dawn"]{--c50:#f4edfe;--c200:#d4b7f7;--c400:#9d6ee8;--c500:#7c4fc4;--bg1:#0f0720;--bg2:#120a28;--txt:#f0eaff;--txt2:#b8a8d8;--txt3:#7a6a9a;--card:rgba(255,255,255,0.06);--border:rgba(255,255,255,0.06);--font-d:'Space Grotesk','Noto Sans SC',sans-serif;--font-b:'Space Grotesk','Noto Sans SC',sans-serif;--r1:8px;--r2:12px;--r3:16px;--accent:#9d6ee8;--side-bg:#120a28;--side-hover:#2d1b4e;--side-active:#9d6ee8;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
[data-theme="nature"]{--c50:#f6f9f4;--c200:#d0e0c7;--c400:#8db87a;--c500:#6b9e54;--bg1:#faf6f0;--bg2:#f5ede2;--txt:#2c3a24;--txt2:#6a7d5e;--txt3:#9aab8e;--card:rgba(255,255,255,0.78);--border:rgba(107,158,84,0.06);--font-d:'Crimson Pro','Noto Sans SC',serif;--font-b:'DM Sans','Noto Sans SC',sans-serif;--r1:10px;--r2:14px;--r3:18px;--accent:#6b9e54;--side-bg:#faf6f0;--side-hover:#e8f0e3;--side-active:#6b9e54;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
[data-theme="jade"]{--c50:#e8f5ee;--c200:#8bdcb0;--c400:#389e6b;--c500:#277a55;--bg1:#0d1a15;--bg2:#111f19;--txt:#e8f5ee;--txt2:#a0c0b0;--txt3:#5a7a6a;--card:rgba(22,40,31,0.65);--border:rgba(56,158,107,0.06);--font-d:'Playfair Display','Noto Sans SC',serif;--font-b:'Space Grotesk','Noto Sans SC',sans-serif;--r1:6px;--r2:8px;--r3:12px;--accent:#389e6b;--side-bg:#111f19;--side-hover:#1a513c;--side-active:#389e6b;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
[data-theme="jelly"]{--c50:#fff4f2;--c200:#ffc9bf;--c400:#ff7a66;--c500:#f5533a;--bg1:#fff7f5;--bg2:#fef2ef;--txt:#1a1a2e;--txt2:#6b7280;--txt3:#9ca3af;--card:rgba(255,255,255,0.9);--border:rgba(245,83,58,0.04);--font-d:'Space Grotesk','Noto Sans SC',sans-serif;--font-b:'DM Sans','Noto Sans SC',sans-serif;--r1:10px;--r2:14px;--r3:18px;--accent:#ff7a66;--side-bg:#fff7f5;--side-hover:#ffe4df;--side-active:#ff7a66;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669}
:root{--c50:#fff7ed;--c200:#fed7aa;--c400:#fb923c;--c500:#f97316;--bg1:#fef9f2;--bg2:#f5eee6;--txt:#2d1f0e;--txt2:#7c6a5a;--txt3:#b09e8e;--card:rgba(255,255,255,0.85);--border:rgba(253,186,116,0.10);--font-d:'DM Sans','Noto Sans SC',sans-serif;--font-b:'DM Sans','Noto Sans SC',sans-serif;--r1:8px;--r2:12px;--r3:16px;--accent:#fb923c;--side-bg:#fef9f2;--side-hover:#ffedd5;--side-active:#fb923c;--dot-r:#dc2626;--dot-g:#389e6b;--chk-d:#ecfdf5;--chk-dt:#059669;--risk-high:#dc2626;--risk-medium:#f59e0b;--risk-low:#06b6d4;--risk-high-bg:rgba(220,38,38,0.06);--risk-medium-bg:rgba(245,158,11,0.08);--risk-low-bg:rgba(6,182,212,0.06)}

/* ===== 共享布局（sidebar / top-bar / theme-picker） ===== */
*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-b);background:var(--bg2);color:var(--txt);min-height:100vh;display:flex;transition:background .35s,color .3s}
.sidebar{display:flex;width:220px;min-height:100vh;background:var(--side-bg);border-right:1px solid var(--border);flex-direction:column;padding:20px 0;flex-shrink:0;position:fixed;top:0;left:0;bottom:0;z-index:10}.sidebar .sb-logo{padding:12px 16px;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border);margin-bottom:12px}.sidebar .sb-logo img{height:56px;width:auto}.sidebar .sb-nav{flex:1;padding:0 10px}.sidebar .sb-nav .sbn-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--r1);color:var(--txt2);text-decoration:none;font-size:14px;font-weight:500;transition:all .15s;cursor:pointer;margin-bottom:2px}.sidebar .sb-nav .sbn-item:hover{background:var(--side-hover);color:var(--txt)}.sidebar .sb-nav .sbn-item.active{background:var(--side-active);color:#fff}.sidebar .sb-nav .sbn-item .snb-icon{font-size:18px;width:24px;text-align:center;flex-shrink:0}.sidebar .sb-bottom{padding:16px 20px 0;border-top:1px solid var(--border);margin-top:auto}.sidebar .sb-bottom .sbu-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--r1);color:var(--txt3);text-decoration:none;font-size:12px;transition:all .15s;cursor:pointer}.sidebar .sb-bottom .sbu-item:hover{background:var(--side-hover);color:var(--txt)}.sidebar .sb-bottom .sbu-item .sbi-icon{font-size:14px;width:20px;text-align:center;flex-shrink:0}
.main-content{margin-left:220px;flex:1;min-height:100vh}
.top-bar{display:flex;justify-content:space-between;align-items:center;padding:14px 28px;background:var(--bg1);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}.top-bar .tb-left{display:flex;align-items:center;gap:12px}.top-bar .tb-left .tb-page-title{font-family:var(--font-d);font-size:20px;font-weight:600;color:var(--txt)}.top-bar .tb-right{display:flex;align-items:center;gap:8px}.top-bar .tb-right .tbb{width:32px;height:32px;border-radius:50%;border:1px solid var(--border);background:transparent;display:flex;align-items:center;justify-content:center;font-size:14px;cursor:pointer}.top-bar .tb-right .tbb:hover{background:var(--c50)}.theme-picker{display:flex;gap:4px;align-items:center;padding:4px 8px;border-radius:var(--r1);border:1px solid var(--border);background:var(--card)}.theme-picker .tp-preview{width:16px;height:16px;border-radius:50%;cursor:pointer;transition:transform .15s;flex-shrink:0;border:2px solid transparent}.theme-picker .tp-preview:hover{transform:scale(1.2)}.theme-picker .tp-preview.active{border-color:var(--txt)}.tp-preview.warm{background:linear-gradient(135deg,#fb923c,#f97316)}.tp-preview.cool{background:linear-gradient(135deg,#4b8fd9,#2563ab)}.tp-preview.dawn{background:linear-gradient(135deg,#9d6ee8,#7c4fc4)}.tp-preview.nature{background:linear-gradient(135deg,#8db87a,#6b9e54)}.tp-preview.jade{background:linear-gradient(135deg,#5bc088,#389e6b)}.tp-preview.jelly{background:linear-gradient(135deg,#ff7a66,#f5533a)}