/*! 由 ./zh/download/ext/app/index.html 内联 <style> 原样提取，勿手改（保持视觉一致） */

*{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#87CEEB;--primary-dark:#4682B4;--bg:#f0f4f8;--card:#FFFFFF;
    --text:#333;--gray:#666;--light-gray:#f8f9fa;--border:#e0e0e0;
    --pad:16px;--radius:16px;
    --yellow-bg:#fff9e6;--yellow-border:#ffd43b;
    --green-bg:#e6f9e6;--green-border:#51cf66;
    --purple-bg:#f3f0ff;--purple-border:#9775fa;
}
body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column;font-size:16px;line-height:1.6
}
.wrap{flex:1;display:flex;flex-direction:column;align-items:center;padding:0 12px;width:100%}
.container{flex:1;width:100%;max-width:1320px;margin:0 auto;padding:24px 0;display:flex;flex-direction:column;align-items:center;gap:24px}

/* navbar */
.navbar{background:var(--primary);padding:12px 0;box-shadow:0 2px 8px rgba(0,0,0,.08);position:sticky;top:0;z-index:100;width:100%}
.navbar-inner{max-width:1320px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 12px}
.logo{font-size:clamp(1.1rem,4vw,1.4rem);font-weight:700;color:var(--primary-dark);text-decoration:none}
.nav-links{display:flex;gap:clamp(8px,3vw,20px);flex-wrap:wrap}
.nav-links a{color:var(--primary-dark);font-weight:500;text-decoration:none;font-size:clamp(.85rem,3vw,1rem)}
.nav-links a:hover,.nav-links a.active{text-decoration:underline;font-weight:600}

/* header */
.header{width:100%;text-align:center;margin-bottom:var(--gap);padding:0 12px}
.header h1{color:var(--primary-dark);font-size:clamp(1.4rem,5vw,2rem);line-height:1.2;margin-bottom:6px}
.header p{color:var(--gray);font-size:clamp(.85rem,3vw,1rem)}

/* search */
.search-row{width:100%;padding:0 12px;margin-bottom:var(--gap)}
.search-row input{width:100%;padding:12px 16px;border:2px solid var(--primary);border-radius:12px;background:var(--card);font-size:clamp(1rem,3vw,1.1rem);outline:none;box-shadow:0 2px 8px rgba(135,206,235,.15)}
.search-row input::placeholder{color:#b0c4de}

/* loading skeleton */
.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;width:100%;max-width:600px;gap:16px}
.spinner{width:40px;height:40px;border-radius:50%;border:3px solid #e0e0e0;border-top-color:var(--primary-dark);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.progress-bar{width:100%;max-width:300px;height:4px;background:#e8e8e8;border-radius:4px;overflow:hidden}
.progress-bar-fill{height:100%;background:var(--primary-dark);border-radius:4px;transition:width .4s;width:0%}
.loading p{color:var(--primary-dark);font-size:1rem}
.loading small{color:#999;font-size:.82rem}

/* card list */
#list{width:100%;display:flex;flex-direction:column;align-items:center;gap:20px}
.card{
    background:var(--card);width:100%;border-radius:var(--radius);
    box-shadow:0 4px 16px rgba(135,206,235,.1);overflow:hidden;position:relative;
    border-bottom:1px solid var(--border);
    opacity:0;transform:translateY(12px);animation:cardIn .45s ease forwards
}
@keyframes cardIn{to{opacity:1;transform:translateY(0)}}
.card:last-child{border-bottom:none}
.card.hidden{display:none}

/* card header */
.card-hd{
    padding:var(--pad);background:linear-gradient(90deg,var(--primary),var(--primary-dark));color:#fff;
    display:flex;justify-content:space-between;align-items:center;cursor:pointer;
    border-radius:var(--radius) var(--radius) 0 0;transition:filter .15s;position:relative;z-index:1;
    user-select:none
}
.card-hd:active{filter:brightness(.9)}
.card-hd h3{font-size:clamp(1rem,3.5vw,1.2rem);font-weight:600;pointer-events:none}
.card-hd .arrow{transition:transform .25s ease;font-size:1.2rem;font-weight:700;flex-shrink:0;width:22px;text-align:center;pointer-events:none}
.card.open .card-hd .arrow{transform:rotate(180deg)}

/* card body — 使用 max-height + opacity 避免 grid reflow 闪烁 */
.card-body{max-height:0;opacity:0;overflow:hidden;transition:max-height .35s ease,opacity .25s ease .05s}
.card.open .card-body{max-height:6000px;opacity:1}
.card-pad{padding:var(--pad);display:flex;flex-direction:column;gap:20px}

/* download group */
.grp{width:100%}
.grptitle{color:var(--primary-dark);font-weight:600;padding-bottom:8px;border-bottom:1px solid #eee;font-size:clamp(1rem,3.5vw,1.1rem);margin-bottom:6px}

/* sub-group header */
.sub-hd{
    padding:10px 14px;background:var(--light-gray);border-radius:10px;
    display:flex;justify-content:space-between;align-items:center;cursor:pointer;margin-bottom:6px;transition:background .15s;user-select:none
}
.sub-hd:hover{background:#e9ecef}
.sub-hd:active{background:#dee2e6}
.sub-hd h4{font-size:.95rem;color:var(--primary-dark);margin:0;pointer-events:none}
.sub-hd .arrow{transition:transform .25s ease;font-size:1.05rem;pointer-events:none}
.sub.open .sub-hd .arrow{transform:rotate(180deg)}

/* sub-group body — max-height 平滑 */
.sub-body{max-height:0;opacity:0;overflow:hidden;transition:max-height .3s ease,opacity .2s ease}
.sub.open .sub-body{max-height:4000px;opacity:1}
.sub-body-inner{overflow:hidden}

/* platform card */
.pcard{background:var(--light-gray);border-radius:12px;padding:var(--pad);margin-bottom:14px;border:1px solid var(--border)}

/* download source card */
.scard{border-radius:8px;padding:11px;margin-top:14px;border-left:3px solid}
.scard.y{background:var(--yellow-bg);border-color:var(--yellow-border)}
.scard.g{background:var(--green-bg);border-color:var(--green-border)}
.scard.p{background:var(--purple-bg);border-color:var(--purple-border)}

/* download item */
.dl-row{display:flex;flex-direction:column;gap:4px;margin-bottom:8px}
.dl-row:last-child{margin-bottom:0}
.dl-lbl{font-size:clamp(.82rem,2.8vw,.92rem);color:var(--gray)}
.dl-val{font-weight:500;font-size:clamp(.88rem,3vw,1rem);display:flex;align-items:center;flex-wrap:wrap;gap:8px;word-break:break-all;overflow-wrap:break-word}
.dl-val a{color:var(--primary-dark);text-decoration:none;flex:1;min-width:0}
.dl-val a:hover{text-decoration:underline}
.dl-empty{color:#aaa;font-style:italic;font-size:.9rem}

/* buttons — 统一 */
.btn{
    padding:5px 10px;border:none;border-radius:6px;font-size:.8rem;cursor:pointer;
    transition:background .15s,transform .1s,box-shadow .15s;
    display:inline-flex;align-items:center;gap:4px;flex-shrink:0;white-space:nowrap
}
.btn:active{transform:scale(.94)}
.btn-gh{background:linear-gradient(90deg,#4682B4,#87CEEB);color:#fff}
.btn-gh:hover{filter:brightness(1.1)}
.btn-dl{background:linear-gradient(90deg,#ff9800,#ffb74d);color:#fff}
.btn-dl:hover{filter:brightness(1.08)}
.scard.y .btn-dl{background:var(--yellow-border)!important}
.scard.g .btn-dl{background:var(--green-border)!important}
.scard.p .btn-dl{background:var(--purple-border)!important}
.btn-cp{background:#dde;color:var(--text)}
.btn-cp:hover{background:#ccd}
.btn-cp.ok{background:#d4edda!important;color:#155724!important}
.ico-cp{width:11px;height:11px;display:inline-block;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='9' y='9' width='13' height='13' rx='2' ry='2'/%3E%3Cpath d='M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1'/%3E%3C/svg%3E") no-repeat center;background-size:contain}

/* empty / error */
.empty{text-align:center;padding:60px 20px;color:var(--primary-dark);font-size:1.05rem;width:100%;max-width:600px}
.retry{margin-top:14px;padding:10px 20px;background:var(--primary-dark);color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:transform .1s}
.retry:active{transform:scale(.95)}

/* footer */
footer{text-align:center;padding:var(--pad);background:var(--primary);color:var(--primary-dark);font-size:clamp(.82rem,2.8vw,.92rem);width:100%}

/* modal */
.modal-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.45);z-index:9999;align-items:center;justify-content:center;padding:20px}
.modal-overlay.show{display:flex}
.modal-card{background:#fff;max-width:440px;width:100%;border-radius:var(--radius);box-shadow:0 8px 32px rgba(0,0,0,.15);overflow:hidden;animation:modalIn .2s ease}
@keyframes modalIn{0%{opacity:0;transform:scale(.95) translateY(10px)}100%{opacity:1;transform:scale(1) translateY(0)}}
.modal-hd{padding:16px 20px;background:linear-gradient(90deg,var(--primary),var(--primary-dark));color:#fff;font-size:1rem;font-weight:600}
.modal-bd{padding:18px 20px;font-size:14px;line-height:1.6}
.modal-bd p{margin-bottom:12px;color:var(--text)}
.modal-bd strong{color:var(--primary-dark)}
.modal-info{background:var(--light-gray);border-radius:10px;padding:11px 13px;word-break:break-all;overflow-wrap:break-word}
.modal-info+.modal-info{margin-top:10px}
.modal-info .hdr{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px;font-size:13px}
.modal-info .hdr .lbl{color:var(--gray);font-weight:500}
.modal-info .hdr .btn-cp{font-size:.75rem;padding:2px 7px;background:#dde;color:var(--text);border:none;border-radius:5px;cursor:pointer}
.modal-info .hdr .btn-cp.ok{background:#d4edda;color:#155724}
.modal-info .val{font-weight:500;font-size:13px;line-height:1.5;color:var(--text);overflow-x:auto;white-space:pre-wrap;word-break:break-all}
.modal-ft{display:flex;gap:10px;padding:14px 20px;border-top:1px solid var(--border)}
.modal-ft .btn{flex:1;padding:10px;font-size:.95rem;justify-content:center}
.btn-cancel{background:#e8e8e8;color:var(--text)}
.btn-cancel:hover{background:#ddd}
.btn-confirm{background:#2ecc71;color:#fff;font-weight:600}
.btn-confirm:hover{background:#27ae60}