:root{
    --primary:#43a047; --primary-dark:#2e7d32; --primary-light:#66bb6a;
    --bg:#f4f6f8; --card:#ffffff; --text:#2e3d32; --text-light:#6b7a70;
    --border:#e5eae7; --green:#43a047; --red:#e53935; --gray:#9e9e9e;
    --shadow:0 2px 12px rgba(0,0,0,.06);
    --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100%}
body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg); color:var(--text); line-height:1.6; font-size:15px;
    background-size:cover; background-position:center; background-attachment:fixed;
}
.bg-overlay{position:fixed;inset:0;background:#fff;z-index:-1;pointer-events:none}
a{color:var(--primary-dark);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}

.container{max-width:720px;margin:0 auto;padding:0 16px 60px}
.nav{
    background:rgba(255,255,255,.92); backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border); position:sticky; top:0; z-index:50;
}
.nav-inner{max-width:720px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:19px;font-weight:700;color:var(--primary-dark);display:flex;align-items:center;gap:6px}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:14px;align-items:center;font-size:14px}
.nav-links a{color:var(--text-light)}
.nav-links a:hover{color:var(--primary-dark);text-decoration:none}

.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}
.card-hd{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
    width:44px;height:44px;border-radius:50%;
    background:linear-gradient(135deg,var(--primary-light),var(--primary));
    color:#fff;font-weight:600;display:flex;align-items:center;justify-content:center;
    font-size:18px;flex-shrink:0;overflow:hidden;
}
.avatar img{width:100%;height:100%;object-fit:cover}
.avatar.sm{width:34px;height:34px;font-size:14px}
.meta{flex:1;min-width:0}
.meta .name{font-weight:600;color:var(--text);display:flex;align-items:center;gap:6px}
.meta .time{font-size:12px;color:var(--text-light)}

.badge{display:inline-block;font-size:11px;padding:2px 8px;border-radius:20px;background:#e8f5e9;color:var(--primary-dark);font-weight:500}
.badge.gray{background:#f0f0f0;color:#666}
.badge.private{background:#fff3e0;color:#e65100}

.post-content{margin:10px 0;white-space:pre-wrap;word-break:break-word}
.post-image{margin:10px 0;border-radius:10px;overflow:hidden;background:#f5f5f5}
.post-image img{width:100%;max-height:520px;object-fit:cover;cursor:zoom-in}

.weight-box{
    background:#f8fdf8;border:1px solid #d7ecd8;border-radius:10px;padding:10px 14px;margin:10px 0;
    display:flex;flex-wrap:wrap;gap:14px;font-size:13px;
}
.weight-box .row{display:flex;align-items:center;gap:6px}
.weight-box .label{color:var(--text-light)}
.weight-box .val{font-weight:600;color:var(--text)}
.weight-box .diff.green{color:var(--green);font-weight:600}
.weight-box .diff.red{color:var(--red);font-weight:600}
.weight-box .diff.gray{color:var(--gray)}
.weight-box .extra{color:var(--text-light);font-size:12px}

.post-actions{display:flex;gap:18px;margin-top:12px;padding-top:12px;border-top:1px solid var(--border);font-size:14px;color:var(--text-light)}
.post-actions button{background:none;border:none;color:var(--text-light);cursor:pointer;font-size:14px;display:flex;align-items:center;gap:5px;font-family:inherit;padding:0}
.post-actions button:hover{color:var(--primary-dark)}
.post-actions button.liked{color:var(--red)}
.post-actions a{color:var(--text-light)}

.comments{margin-top:12px;padding-top:12px;border-top:1px dashed var(--border)}
.comment{display:flex;gap:10px;margin-bottom:10px;font-size:14px}
.comment .body{flex:1;background:#f8f9fa;border-radius:10px;padding:8px 12px}
.comment .name{font-weight:600;font-size:13px;color:var(--primary-dark)}
.comment .time{font-size:11px;color:var(--text-light);margin-left:8px}
.comment-form{display:flex;gap:8px;margin-top:10px}
.comment-form input{flex:1}

input,textarea,select{
    font-family:inherit;font-size:15px;padding:10px 12px;
    border:1px solid var(--border);border-radius:10px;width:100%;
    transition:.2s;background:#fff;color:var(--text);
}
input:focus,textarea:focus,select:focus{
    outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(67,160,71,.12);
}
textarea{resize:vertical;min-height:90px;line-height:1.6}
label{display:block;font-size:13px;color:var(--text-light);margin-bottom:6px;font-weight:500}
.field{margin-bottom:16px}

.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    background:linear-gradient(135deg,var(--primary-light),var(--primary));
    color:#fff;border:none;padding:11px 22px;border-radius:10px;
    font-size:15px;cursor:pointer;font-weight:500;transition:.2s;
    text-decoration:none;font-family:inherit;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(67,160,71,.3);text-decoration:none;color:#fff}
.btn:disabled{background:#ccc;cursor:not-allowed;transform:none;box-shadow:none}
.btn-block{width:100%}
.btn-sec{background:#f5f7f6;color:var(--text);border:1px solid var(--border)}
.btn-sec:hover{background:#eef1ef;color:var(--text);box-shadow:0 2px 6px rgba(0,0,0,.06)}
.btn-sm{padding:6px 12px;font-size:13px}
.btn-danger{background:#fdecec;color:#c62828;border:1px solid #f5c6c6}

.alert{padding:10px 14px;border-radius:10px;margin-bottom:14px;font-size:14px}
.alert-err{background:#ffebee;color:#c62828;border-left:3px solid #ef5350}
.alert-ok{background:#e8f5e9;color:#2e7d32;border-left:3px solid var(--primary)}
.alert-info{background:#e3f2fd;color:#1565c0;border-left:3px solid #42a5f5}

.auth-wrap{max-width:420px;margin:40px auto;padding:0 16px}
.auth-card{background:#fff;border-radius:18px;box-shadow:0 8px 30px rgba(0,0,0,.08);padding:32px}
.auth-title{font-size:22px;font-weight:700;color:var(--primary-dark);text-align:center;margin-bottom:6px}
.auth-sub{text-align:center;color:var(--text-light);font-size:13px;margin-bottom:24px}
.auth-footer{text-align:center;margin-top:18px;font-size:13px;color:var(--text-light)}

.profile-header{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:16px;text-align:center}
.profile-header .avatar{width:72px;height:72px;font-size:28px;margin:0 auto 12px}
.profile-header .nickname{font-size:20px;font-weight:700}
.profile-header .email{color:var(--text-light);font-size:13px;margin-top:2px}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.stat{background:#f8fdf8;border-radius:10px;padding:12px 8px;text-align:center}
.stat .num{font-size:20px;font-weight:700;color:var(--primary-dark)}
.stat .lbl{font-size:12px;color:var(--text-light);margin-top:2px}

.progress-wrap{margin-top:18px;text-align:left}
.progress-info{display:flex;justify-content:space-between;font-size:13px;color:var(--text-light);margin-bottom:6px}
.progress-bar{height:12px;background:#e8efe9;border-radius:20px;overflow:hidden;position:relative}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-light),var(--primary));border-radius:20px;transition:width .6s ease}
.progress-marks{display:flex;justify-content:space-between;font-size:12px;color:var(--text-light);margin-top:6px}

.calendar{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-top:16px}
.calendar h3{font-size:16px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}
.cal-nav a{font-size:14px;padding:4px 10px;border-radius:6px}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.cal-head{font-size:12px;color:var(--text-light);text-align:center;padding:6px 0}
.cal-day{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:13px;border-radius:8px;color:var(--text-light)}
.cal-day.active{background:linear-gradient(135deg,var(--primary-light),var(--primary));color:#fff;font-weight:600}
.cal-day.today{box-shadow:inset 0 0 0 2px var(--primary)}

.empty{text-align:center;padding:48px 20px;color:var(--text-light)}
.empty .icon{font-size:48px;margin-bottom:12px;opacity:.5}

.tabs{display:flex;gap:4px;background:#f5f7f6;padding:4px;border-radius:10px;margin-bottom:16px}
.tabs a{flex:1;text-align:center;padding:8px;border-radius:7px;font-size:14px;color:var(--text-light)}
.tabs a.active{background:#fff;color:var(--primary-dark);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.tabs a:hover{text-decoration:none}

.fab{
    position:fixed;right:20px;bottom:24px;
    width:56px;height:56px;border-radius:50%;
    background:linear-gradient(135deg,var(--primary-light),var(--primary));
    color:#fff;display:flex;align-items:center;justify-content:center;
    font-size:26px;box-shadow:0 6px 20px rgba(67,160,71,.4);
    z-index:40;transition:.2s;
}
.fab:hover{transform:scale(1.08);text-decoration:none;color:#fff}

.hint{font-size:12px;color:var(--text-light);margin-top:4px}
.chk{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text);cursor:pointer;margin-bottom:10px}
.chk input{width:auto}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:480px){.row-2{grid-template-columns:1fr}}

.toast{
    position:fixed;left:50%;top:20px;transform:translateX(-50%);
    background:rgba(46,61,50,.92);color:#fff;padding:10px 20px;border-radius:10px;
    font-size:14px;z-index:9999;opacity:0;transition:.3s;pointer-events:none;
}
.toast.show{opacity:1}

.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:100;display:none;align-items:center;justify-content:center;padding:20px}
.modal-bg.show{display:flex}
.modal-bg img{max-width:100%;max-height:90vh;border-radius:10px}

/* 后台样式 */
.admin-body{background:#f0f2f5}
.admin-wrap{max-width:1100px;margin:0 auto;padding:20px}
.admin-nav{background:#fff;border-bottom:1px solid var(--border);padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:56px;box-shadow:0 1px 4px rgba(0,0,0,.04)}
.admin-nav .brand{font-size:17px}
.admin-menu{display:flex;gap:20px;font-size:14px}
.admin-menu a{color:var(--text-light);padding:6px 0;border-bottom:2px solid transparent}
.admin-menu a.active,.admin-menu a:hover{color:var(--primary-dark);border-bottom-color:var(--primary);text-decoration:none}
.admin-table{width:100%;border-collapse:collapse;font-size:14px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.admin-table th,.admin-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}
.admin-table th{background:#fafbfa;font-weight:600;color:var(--text-light);font-size:13px}
.admin-table tr:last-child td{border-bottom:none}
.admin-table tr:hover td{background:#fafcfa}
.admin-table .actions a{font-size:13px;margin-right:10px}

.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:20px}
.stat-card{background:#fff;border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.stat-card .num{font-size:26px;font-weight:700;color:var(--primary-dark)}
.stat-card .lbl{font-size:13px;color:var(--text-light);margin-top:4px}

.pagination{display:flex;gap:6px;justify-content:center;margin-top:20px}
.pagination a,.pagination span{padding:6px 12px;border-radius:8px;background:#fff;font-size:14px;color:var(--text-light)}
.pagination a:hover{background:var(--primary);color:#fff;text-decoration:none}
.pagination .current{background:var(--primary);color:#fff}