:root{--primary:#5b5ff2;--primary2:#7c3aed;--dark:#121629;--muted:#72788d;--bg:#f5f7fb;--card:#fff;--line:#e8eaf2;--success:#16a34a;--danger:#dc2626;--shadow:0 16px 45px rgba(35,42,90,.10)}*{box-sizing:border-box}body{margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--dark)}a{text-decoration:none;color:inherit}button,input,select,textarea{font:inherit}.container{max-width:1200px;margin:auto;padding:0 20px}.nav{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;position:sticky;top:0;z-index:10}.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%}.brand{font-size:24px;font-weight:900;letter-spacing:-1px}.brand b{color:var(--primary)}.nav-links{display:flex;gap:28px;align-items:center;color:#4c5267}.btn{border:0;border-radius:12px;padding:11px 18px;cursor:pointer;background:#eef0f8;color:#282d42;font-weight:700}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}.btn-danger{background:#fee2e2;color:var(--danger)}.hero{padding:72px 0;background:radial-gradient(circle at 80% 10%,#e8e7ff 0,transparent 35%),linear-gradient(180deg,#fff,#f5f7fb)}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}.hero h1{font-size:58px;line-height:1.08;margin:0 0 20px}.hero p{font-size:18px;color:var(--muted);line-height:1.8}.hero-card{background:#171a32;color:#fff;border-radius:30px;padding:30px;box-shadow:var(--shadow)}.hero-card img{width:100%;height:300px;object-fit:cover;border-radius:20px}.section{padding:55px 0}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:24px}.section-head h2{font-size:30px;margin:0}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 25px rgba(30,35,70,.05)}.product img{width:100%;height:190px;object-fit:cover;border-radius:14px}.product h3{font-size:16px;margin:14px 0 8px}.price{font-size:22px;color:#ef4444;font-weight:900}.old{font-size:13px;color:#a0a5b6;text-decoration:line-through;margin-left:8px}.categories{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.category{text-align:center;background:#fff;padding:20px 10px;border-radius:16px;border:1px solid var(--line)}.category span{font-size:30px;display:block;margin-bottom:8px}.footer{background:#171a2f;color:#aeb4cb;padding:45px 0;margin-top:40px}.footer strong{color:white}.auth-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#eef0ff,#f9fafc)}.auth-card{width:min(430px,92vw);background:#fff;padding:34px;border-radius:24px;box-shadow:var(--shadow)}.form-group{margin:14px 0}.form-control{width:100%;padding:13px 14px;border:1px solid #dfe2ec;border-radius:11px;outline:none}.form-control:focus{border-color:var(--primary)}.dashboard{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:#171a2f;color:#cdd2e3;padding:26px 18px}.sidebar .brand{color:#fff;margin:0 12px 30px}.menu a{display:block;padding:13px 14px;border-radius:10px;margin:7px 0}.menu a:hover,.menu a.active{background:#2a2e4d;color:white}.main{padding:30px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.stat{padding:22px;background:#fff;border-radius:16px;border:1px solid var(--line)}.stat .num{font-size:30px;font-weight:900;margin-top:8px}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:16px;margin-top:22px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:14px;border-bottom:1px solid var(--line);white-space:nowrap}th{background:#fafbfe}.badge{display:inline-block;padding:5px 9px;border-radius:999px;background:#eef0ff;color:var(--primary);font-size:12px}.mobile-shell{max-width:430px;margin:auto;min-height:100vh;background:#f7f8fc;box-shadow:0 0 40px rgba(0,0,0,.12)}.mobile-head{padding:22px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;border-radius:0 0 26px 26px}.bottom-nav{position:sticky;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid var(--line);padding:10px}.bottom-nav a{text-align:center;font-size:12px}.search{display:flex;gap:10px}.search input{flex:1}.modal{position:fixed;inset:0;background:#0008;display:none;align-items:center;justify-content:center;z-index:30}.modal.show{display:flex}.modal-card{width:min(560px,92vw);max-height:90vh;overflow:auto;background:#fff;padding:24px;border-radius:18px}@media(max-width:900px){.hero-grid{grid-template-columns:1fr}.hero h1{font-size:42px}.grid{grid-template-columns:repeat(2,1fr)}.categories{grid-template-columns:repeat(3,1fr)}.dashboard{grid-template-columns:1fr}.sidebar{display:none}.stats{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.grid{grid-template-columns:1fr 1fr;gap:10px}.product{padding:10px}.product img{height:140px}.hero{padding:40px 0}.hero h1{font-size:36px}.nav-links a{display:none}.stats{grid-template-columns:1fr 1fr}.main{padding:16px}}