:root{--bg:#f7f8fc;--bg-card:#fff;--bg-hover:#f0f3ff;--text:#2b2f3a;--text-dim:#6b7280;--accent:#4f6ef7;--accent-hover:#6d86f9;--border:#e4e8f0;--radius:14px;--shadow:0 2px 8px #1f29370f}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.7}a{color:var(--accent);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-hover)}.nav{z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);background:#f7f8fceb;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:100%;margin:0 auto;padding:12px 16px;display:flex}.brand{color:var(--text);align-items:center;gap:6px;font-size:18px;font-weight:700;display:flex}.brand:hover{color:var(--accent)}.nav-links{gap:18px;display:flex}.nav-links a{color:var(--text-dim);padding:4px 0;font-size:14px}.nav-links a:hover,.nav-links a.active{color:var(--accent);font-weight:600}.container{max-width:100%;margin:0 auto;padding:32px 16px}.hero{text-align:center;padding:32px 0 24px}.hero h1{letter-spacing:1px;background:linear-gradient(120deg, var(--accent), #a78bfa);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:14px;font-size:34px;font-weight:800}.hero p{color:var(--text-dim);max-width:640px;margin:0 auto;font-size:16px}.hero .badge{color:var(--accent);background:#4f6ef714;border:1px solid #4f6ef740;border-radius:999px;margin-top:18px;padding:6px 14px;font-size:13px;display:inline-block}.section-title{border-left:4px solid var(--accent);margin:40px 0 16px;padding-left:12px;font-size:20px;font-weight:700}.grid{grid-template-columns:1fr;gap:14px;display:grid}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;transition:transform .2s,border-color .2s,background .2s,box-shadow .2s}.card:hover{border-color:var(--accent);background:var(--bg-hover);transform:translateY(-2px);box-shadow:0 6px 18px #4f6ef71f}.card h3{margin-bottom:8px;font-size:16px}.card p{color:var(--text-dim);font-size:14px}.card .tag{color:var(--accent);background:#4f6ef71a;border-radius:999px;margin-top:12px;padding:2px 10px;font-size:12px;display:inline-block}.about-block{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;padding:24px}.about-block h2{margin-bottom:14px;font-size:19px}.about-block p,.about-block li{color:var(--text-dim);font-size:14px}.about-block ul{margin:12px 0;padding-left:20px}.share-list{flex-direction:column;gap:12px;display:flex}.file-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;justify-content:space-between;align-items:stretch;gap:12px;padding:16px;transition:border-color .2s,background .2s,box-shadow .2s;display:flex}.file-item:hover{border-color:var(--accent);background:var(--bg-hover);box-shadow:0 4px 12px #4f6ef71a}.file-info{align-items:center;gap:12px;display:flex}.file-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;display:flex}.file-icon.img{background:#4f6ef71a}.file-icon.doc{background:#a78bfa1f}.file-icon.zip{background:#10b9811a}.file-name{font-size:15px;font-weight:600}.file-meta{color:var(--text-dim);margin-top:2px;font-size:13px}.download-btn{background:var(--accent);cursor:pointer;text-align:center;white-space:nowrap;border:none;border-radius:10px;width:100%;padding:12px 20px;font-size:15px;font-weight:600;transition:background .2s;display:block;color:#fff!important}.download-btn:hover,.download-btn:active{background:var(--accent-hover)}.footer{border-top:1px solid var(--border);text-align:center;color:var(--text-dim);margin-top:32px;padding:28px 16px;font-size:12px}@media (width>=640px){.nav-inner{max-width:960px;padding:14px 24px}.brand{gap:8px;font-size:20px}.nav-links{gap:24px}.nav-links a{font-size:15px}.container{max-width:960px;padding:48px 24px}.hero{padding:60px 0 40px}.hero h1{margin-bottom:16px;font-size:44px}.hero p{font-size:18px}.hero .badge{padding:6px 16px;font-size:13px}.section-title{margin:56px 0 24px;font-size:24px}.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.card{padding:24px}.card h3{font-size:17px}.about-block{margin-bottom:24px;padding:32px}.about-block h2{font-size:22px}.about-block p,.about-block li{font-size:15px}.share-list{gap:12px}.file-item{flex-direction:row;align-items:center;gap:0;padding:16px 20px}.file-info{gap:14px}.download-btn{width:auto;padding:8px 20px;font-size:14px;display:inline-block}.footer{margin-top:40px;padding:32px 24px;font-size:13px}}