:root{--bg: #F5F7FA;--surface: #FFFFFF;--border: #E5E7EB;--text-1: #1F2A3D;--text-2: #666E73;--accent: #6685F7;--accent-deep: #4576EB;--nav-active-bg: #E3EBFD;--nav-active-bd: #ABC4F7;--radius-lg: 20px;--radius-md: 14px;--radius-sm: 10px;--shadow-card: 0 2px 12px rgba(0,0,0,.04);--shadow-btn: 0 2px 8px rgba(69,118,235,.2);--font: "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text-1);min-height:100vh}.app{display:flex;min-height:100vh}.sidebar{width:248px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:24px 16px;position:sticky;top:0;height:100vh}.logo{display:flex;align-items:center;gap:10px;padding:0 8px;margin-bottom:28px}.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#6685f7,#4576eb);display:flex;align-items:center;justify-content:center}.logo-mark svg{width:20px;height:20px}.logo-text{font-size:18px;font-weight:700;color:var(--text-1)}.nav{display:flex;flex-direction:column;gap:4px}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-2);font-size:14px;font-weight:500;cursor:pointer;transition:.15s}.nav-item:hover{background:#f2f4f8}.nav-item.active{background:var(--nav-active-bg);color:var(--accent-deep);border:1px solid var(--nav-active-bd);font-weight:600}.nav-item svg{width:18px;height:18px;flex-shrink:0}.spacer{flex:1}.profile{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius-sm);margin-bottom:12px}.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#6685f7,#4576eb);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.profile-meta{display:flex;flex-direction:column;line-height:1.3}.profile-name{font-size:14px;font-weight:600}.profile-sub{font-size:12px;color:var(--text-2)}.upgrade{width:100%;padding:11px;border:none;border-radius:var(--radius-sm);cursor:pointer;background:var(--accent);color:#fff;font-size:13px;font-weight:600;box-shadow:var(--shadow-btn)}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:72px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 32px}.topbar h1{font-size:20px;font-weight:700}.search{flex:1;max-width:440px;margin:0 24px;height:40px;display:flex;align-items:center;gap:8px;padding:0 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm)}.search svg{width:16px;height:16px;color:var(--text-2);flex-shrink:0}.search input{flex:1;border:none;outline:none;font-size:14px;color:var(--text-1);background:transparent}.search input::placeholder{color:#9aa1a9}.topbar-right{display:flex;align-items:center;gap:12px}.icon-btn{width:38px;height:38px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-2)}.topbar-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#6685f7,#4576eb);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px}.scroll{padding:32px;display:flex;flex-direction:column;gap:28px;overflow-y:auto}.hero{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-card)}.hero h2{font-size:24px;font-weight:700;margin-bottom:6px}.hero p{font-size:14px;color:var(--text-2);margin-bottom:20px}.cmd{display:flex;align-items:center;gap:12px;height:56px;padding:0 12px 0 18px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface)}.cmd svg{width:22px;height:22px;color:var(--accent);flex-shrink:0}.cmd input{flex:1;border:none;outline:none;font-size:15px;background:transparent;color:var(--text-1)}.cmd input::placeholder{color:#9aa1a9}.send{padding:0 22px;height:40px;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer;box-shadow:var(--shadow-btn)}.chips{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.chip{padding:8px 16px;border:1px solid var(--border);border-radius:999px;background:#f2f4f8;font-size:13px;color:var(--text-2);cursor:pointer;transition:.15s}.chip:hover{background:var(--nav-active-bg);color:var(--accent-deep);border-color:var(--nav-active-bd)}.result{margin-top:18px;padding:18px;border:1px dashed var(--accent);border-radius:var(--radius-md);background:#f7f9ff;font-size:14px;line-height:1.7;color:var(--text-1);display:none}.result.show{display:block}.result .tag{display:inline-block;font-size:12px;color:var(--accent-deep);font-weight:600;margin-bottom:8px}.result-body{display:block;white-space:pre-wrap}.result-images{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.result-images img{max-width:100%;max-height:420px;border-radius:8px;border:1px solid #E3EAFB;background:#fff;object-fit:contain}.result-json{margin:0;padding:12px;background:#fff;border:1px solid #E3EAFB;border-radius:8px;font-size:12px;line-height:1.6;white-space:pre-wrap;word-break:break-all;overflow-x:auto}.section-head{font-size:18px;font-weight:700;margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card);cursor:pointer;transition:.18s}.tool:hover{transform:translateY(-3px);box-shadow:0 6px 18px #00000012}.tool-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}.tool-icon svg{width:26px;height:26px;color:#fff}.tool h3{font-size:15px;font-weight:600;margin-bottom:6px}.tool p{font-size:13px;color:var(--text-2);line-height:1.5}.g-chat{background:linear-gradient(135deg,#e3ebfd,#6685f7)}.g-paint{background:linear-gradient(135deg,#faebf2,#d980a6)}.g-copy{background:linear-gradient(135deg,#e0f2f2,#33bfd1)}.g-code{background:linear-gradient(135deg,#e6ebfd,#738cf2)}.g-doc{background:linear-gradient(135deg,#e0f5ec,#59c7ae)}.g-trans{background:linear-gradient(135deg,#faf2e0,#e6b259)}.g-img{background:linear-gradient(135deg,#e6edfd,#8cb8f5)}.g-voice{background:linear-gradient(135deg,#fce7e6,#e68c80)}.recent{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.rec{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:.15s}.rec:hover{background:#f8faff}.rec-ic{width:38px;height:38px;border-radius:10px;background:#f2f4f8;display:flex;align-items:center;justify-content:center;color:var(--text-2)}.rec-ic svg{width:18px;height:18px}.rec-meta{display:flex;flex-direction:column;line-height:1.4;min-width:0}.rec-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rec-time{font-size:12px;color:var(--text-2)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:#1f2a3d;color:#fff;padding:12px 20px;border-radius:10px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:99}.toast.show{opacity:1}