/* ============================================================
 *  账号设置页（profile.php）样式
 *  现代卡片式布局 + 渐变 + 微动效，支持深色模式
 * ============================================================ */

:root{
    --bg:        #f5f7fb;
    --bg-soft:   #eef1f8;
    --card:      #ffffff;
    --card-2:    #fafbff;
    --text:      #1f2430;
    --text-mid:  #4b5163;
    --text-soft: #8a90a3;
    --brand:     #5b7cff;
    --brand-2:   #7c5cff;
    --brand-soft:#eef2ff;
    --border:    #ebedf3;
    --border-strong: #d9dde8;
    --err:       #ef4444;
    --err-bg:    #fef2f2;
    --ok:        #16a34a;
    --ok-bg:     #ecfdf5;
    --warn:      #f59e0b;
    --shadow-card: 0 1px 3px rgba(20,30,80,.04), 0 6px 24px rgba(20,30,80,.06);
    --shadow-pop:  0 8px 32px rgba(20,30,80,.12);
    --radius:    14px;
    --radius-sm: 10px;
}

[data-theme="dark"]{
    --bg:        #151821;
    --bg-soft:   #1d2230;
    --card:      #1e2230;
    --card-2:    #232838;
    --text:      #e8eaf0;
    --text-mid:  #b4bbcd;
    --text-soft: #8a90a3;
    --brand:     #6b93ff;
    --brand-2:   #9b7cff;
    --brand-soft:#1f2740;
    --border:    #2c3244;
    --border-strong: #3f4558;
    --err:       #f87171;
    --err-bg:    #3a1e1e;
    --ok:        #4ade80;
    --ok-bg:     #1c3326;
    --warn:      #fbbf24;
    --shadow-card: 0 1px 3px rgba(0,0,0,.3), 0 6px 24px rgba(0,0,0,.4);
    --shadow-pop:  0 8px 32px rgba(0,0,0,.5);
}

*{box-sizing:border-box;margin:0;padding:0}
body{
    font-family:"PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
    background:var(--bg);color:var(--text);min-height:100vh;
    background-image:
        radial-gradient(circle at 0% 0%, rgba(91,124,255,.06) 0%, transparent 35%),
        radial-gradient(circle at 100% 100%, rgba(124,92,255,.06) 0%, transparent 35%);
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

/* 顶部导航 */
.st-top{
    background:rgba(255,255,255,.85);
    backdrop-filter:saturate(180%) blur(12px);
    -webkit-backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid var(--border);
    padding:0 28px;height:60px;display:flex;align-items:center;justify-content:space-between;
    position:sticky;top:0;z-index:10;
}
[data-theme="dark"] .st-top{background:rgba(30,34,48,.85)}
.st-top h1{font-size:16px;font-weight:700;letter-spacing:.3px}
.st-top .st-brand{display:flex;align-items:center;gap:10px;margin:0 auto}
.st-top .st-brand-dot{
    width:28px;height:28px;border-radius:8px;
    background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
    display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:700;
}
/* 2026-09-23：「← 返回首页」链接（.st-back / .st-back:hover）已随按钮一起下线，
   账号设置页顶栏不再有该元素 —— 别把这组规则加回来。 */

/* 个人页顶部「管理后台」入口（教师 / 管理员可见） */
.st-admin-btn{
    display:inline-flex;align-items:center;gap:6px;margin-left:14px;
    padding:7px 16px;border-radius:30px;font-size:13px;font-weight:700;
    color:#fff;text-decoration:none;white-space:nowrap;
    background:linear-gradient(135deg,var(--brand,#4f7cff),var(--purple,#7c5cff));
    transition:transform .18s,box-shadow .18s;
}
.st-admin-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(79,124,255,.35)}

/* 主布局 */
.st-wrap{
    max-width:1080px;margin:28px auto 60px;padding:0 24px;
    display:flex;gap:24px;align-items:flex-start;
}

/* 左侧菜单 */
.st-sidebar{
    width:220px;flex-shrink:0;
    background:var(--card);border-radius:var(--radius);
    border:1px solid var(--border);box-shadow:var(--shadow-card);
    padding:14px;position:sticky;top:84px;
}
.st-sidebar-title{
    font-size:11px;color:var(--text-soft);
    text-transform:uppercase;letter-spacing:1.2px;
    padding:8px 10px 12px;font-weight:600;
}
.st-menu-item{
    display:flex;align-items:center;gap:10px;
    padding:11px 14px;font-size:14px;color:var(--text-mid);
    border-radius:var(--radius-sm);cursor:pointer;
    transition:all .18s;background:none;border:none;width:100%;
    margin-bottom:4px;text-align:left;
}
.st-menu-item:hover{color:var(--text);background:var(--bg-soft)}
.st-menu-item.active{
    color:var(--brand);background:var(--brand-soft);
    font-weight:600;
}
.st-menu-item.active .st-menu-ico{
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#fff;
}
.st-menu-item:disabled,
.st-menu-item.disabled{
    opacity:.5;cursor:not-allowed;
    color:var(--text-light);
}
.st-menu-ico{
    width:26px;height:26px;border-radius:8px;
    background:var(--bg-soft);color:var(--text-mid);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:14px;transition:all .18s;flex-shrink:0;
}

/* 右侧内容 */
.st-main{
    flex:1;background:var(--card);border-radius:var(--radius);
    border:1px solid var(--border);box-shadow:var(--shadow-card);
    overflow:hidden;
}
.st-panel{display:none;padding:36px 40px 44px}
.st-panel.active{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.st-title{font-size:20px;font-weight:700;margin-bottom:6px;letter-spacing:.3px}
.st-sub{color:var(--text-soft);font-size:13px;margin-bottom:28px}

/* 表单行 */
.form-row{
    display:flex;align-items:flex-start;gap:20px;
    margin-bottom:24px;
}
.form-label{
    width:96px;padding-top:11px;font-size:13.5px;color:var(--text);
    text-align:right;flex-shrink:0;font-weight:500;
}
.form-label .required{color:var(--err);margin-right:3px;font-weight:700}
.form-field{flex:1;min-width:0}
.form-input,.form-select,.form-textarea{
    width:100%;padding:11px 14px;border:1px solid var(--border);
    border-radius:var(--radius-sm);background:var(--bg-soft);
    color:var(--text);font-size:14px;line-height:1.5;
    transition:all .2s;font-family:inherit;
}
.form-input:focus,.form-select:focus,.form-textarea:focus{
    outline:none;border-color:var(--brand);
    background:var(--card);
    box-shadow:0 0 0 4px rgba(91,124,255,.12);
}
.form-input::placeholder,.form-textarea::placeholder{color:var(--text-soft)}
.form-select{cursor:pointer;appearance:none;
    background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%238a90a3' d='M1 1l5 5 5-5'/></svg>");
    background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;
}
.form-textarea{resize:vertical;min-height:90px;line-height:1.6}
.form-hint{font-size:12px;color:var(--text-soft);margin-top:6px}
.form-count{float:right;font-size:12px;color:var(--text-soft)}
.form-count.warn{color:var(--err)}

/* 级联城市 */
.region-group{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
.region-group.identity-group{grid-template-columns:1fr 1fr 1fr 1fr}
@media(max-width:640px){
    .region-group,.region-group.identity-group{grid-template-columns:1fr 1fr}
}

/* 头像 */
.avatar-row{align-items:center}
.avatar-preview{
    width:96px;height:96px;border-radius:50%;overflow:hidden;
    border:3px solid var(--card);background:var(--bg-soft);flex-shrink:0;
    box-shadow:0 0 0 1px var(--border), 0 4px 14px rgba(0,0,0,.06);
    position:relative;cursor:pointer;transition:transform .2s;
}
.avatar-preview:hover{transform:scale(1.04)}
.avatar-preview:hover .avatar-mask{opacity:1}
.avatar-preview img{width:100%;height:100%;object-fit:cover;display:block}
.avatar-mask{
    position:absolute;inset:0;background:rgba(0,0,0,.5);
    color:#fff;display:flex;flex-direction:column;
    align-items:center;justify-content:center;gap:4px;
    font-size:12px;opacity:0;transition:opacity .2s;
}
.avatar-meta{display:flex;flex-direction:column;gap:8px;min-width:0}
.avatar-tip{font-size:12px;color:var(--text-soft);line-height:1.6}
.avatar-tip .upload-btn{
    display:inline-block;padding:5px 14px;border-radius:8px;
    background:var(--brand);color:#fff;font-size:12px;font-weight:600;
    cursor:pointer;transition:background .2s;margin-right:8px;
}
.avatar-tip .upload-btn:hover{background:var(--brand-2)}
.avatar-tip .upload-btn.ghost{background:transparent;color:var(--text-soft);border:1px solid var(--border)}
.avatar-tip .upload-btn.ghost:hover{color:var(--err);border-color:var(--err);background:transparent}

/* 按钮 */
.btn{
    padding:10px 26px;border-radius:var(--radius-sm);border:none;
    font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
}
.btn-primary{
    background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
    color:#fff;box-shadow:0 4px 12px rgba(91,124,255,.25);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(91,124,255,.35)}
.btn-ghost{background:var(--bg-soft);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--card)}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none!important;box-shadow:none!important}
.form-actions{margin-top:32px;padding-left:116px;display:flex;gap:10px}

/* 提示条 */
.flash{
    padding:12px 18px;border-radius:var(--radius-sm);font-size:13.5px;
    margin:24px 40px 0;display:flex;align-items:center;gap:10px;
    border:1px solid transparent;
}
.flash.success{background:var(--ok-bg);color:var(--ok);border-color:rgba(22,163,74,.15)}
.flash.error{background:var(--err-bg);color:var(--err);border-color:rgba(239,68,68,.15)}

/* 密码强度 */
.pwd-strength{display:flex;gap:5px;margin-top:10px;height:4px}
.pwd-strength span{flex:1;background:var(--border);border-radius:2px;transition:background .2s}
.pwd-strength span.weak{background:var(--err)}
.pwd-strength span.medium{background:var(--warn)}
.pwd-strength span.strong{background:var(--ok)}

/* 安全中心行列表 */
.sec-list{padding:8px 0 14px}
.sec-row{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 0;border-bottom:1px solid var(--border);
}
.sec-row:last-child{border-bottom:none}
.sec-main{display:flex;align-items:center;gap:14px;flex:1;min-width:0}
.sec-icon{
    width:42px;height:42px;border-radius:12px;
    background:var(--bg-soft);color:var(--text-mid);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:18px;flex-shrink:0;
}
.sec-icon.email{background:rgba(91,124,255,.10);color:var(--brand)}
.sec-icon.pwd{background:rgba(245,158,11,.10);color:var(--warn)}
.sec-icon.realname{background:rgba(22,163,74,.10);color:var(--ok)}
.sec-icon.logout{background:rgba(239,68,68,.10);color:var(--err)}
.sec-info{display:flex;flex-direction:column;gap:4px;min-width:0}
.sec-label{font-size:14px;font-weight:600;color:var(--text)}
.sec-value{font-size:13px;color:var(--text-soft);word-break:break-all}
.sec-action{
    font-size:13px;color:var(--brand);cursor:pointer;
    background:none;border:none;padding:7px 14px;border-radius:8px;
    transition:all .15s;white-space:nowrap;font-family:inherit;
    border:1px solid transparent;font-weight:500;
}
.sec-action:hover{background:var(--brand-soft)}
.sec-action.danger{color:var(--err)}
.sec-action.danger:hover{background:var(--err-bg)}
.sec-action:disabled{color:var(--text-soft);cursor:not-allowed;background:none}

/* 密码修改展开区 */
.pwd-form{display:none;margin:14px 0 4px;padding:22px 24px;
    background:var(--bg-soft);border-radius:12px;border:1px solid var(--border)}
.pwd-form.active{display:block;animation:fadeIn .25s ease}
.pwd-form .form-row{margin-bottom:16px}
.pwd-form .form-row:last-child{margin-bottom:0}
.pwd-form .form-label{width:84px}
.pwd-form .form-actions{padding-left:104px;margin-top:20px}

/* 弹窗（邮箱绑定/换绑） */
.modal-overlay{
    position:fixed;inset:0;background:rgba(20,30,80,.45);
    display:none;align-items:center;justify-content:center;
    z-index:100;animation:fadeIn .2s ease;
}
.modal-overlay.active{display:flex}
.modal{
    background:var(--card);border-radius:16px;width:min(440px,92vw);
    padding:28px 30px;box-shadow:var(--shadow-pop);
    animation:modalIn .25s ease;
}
@keyframes modalIn{from{opacity:0;transform:translateY(-12px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal-title{font-size:17px;font-weight:700;margin-bottom:6px}
.modal-sub{font-size:13px;color:var(--text-soft);margin-bottom:22px;line-height:1.6}
.modal-field{margin-bottom:14px}
.modal-field label{display:block;font-size:12px;color:var(--text-mid);margin-bottom:6px;font-weight:500}
.modal-input-row{display:flex;gap:8px}
.modal-input-row .form-input{flex:1}
.modal-send-btn{
    padding:11px 14px;border:none;border-radius:var(--radius-sm);
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;
    transition:all .2s;flex-shrink:0;
}
.modal-send-btn:hover{background:var(--brand);color:#fff}
.modal-send-btn[disabled]{background:var(--bg-soft);color:var(--text-soft);cursor:not-allowed}

/* 验证码 input + 发送按钮 同行 */
.field-code{display:flex;gap:8px;align-items:stretch}
.field-code .form-input{flex:1;min-width:0}
.field-code .modal-send-btn{padding:11px 16px;align-self:stretch}

/* 账号绑定/换绑弹窗（mobile-first 重做样式） */
.modal-account{max-width:460px;width:94vw;padding:30px 28px 26px;position:relative}
.modal-account .modal-title{font-size:18px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.modal-account .modal-title::before{content:"";display:inline-block;width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--brand) 0%,var(--brand-2) 100%)}
.modal-account .modal-sub{font-size:12.5px;color:var(--text-soft);margin-bottom:22px;line-height:1.7;background:var(--bg-soft);padding:10px 12px;border-radius:8px;border-left:3px solid var(--brand)}
.modal-account .modal-field{margin-bottom:18px}
.modal-account .modal-field label{font-size:13px;font-weight:600;color:var(--text);margin-bottom:8px}
.modal-account .form-input{padding:12px 14px;font-size:14px;border-radius:10px}
.modal-account .code-input{font-family:"Menlo","Consolas",monospace;font-size:20px!important;font-weight:700!important;letter-spacing:6px;text-align:center}
.modal-account .form-hint{font-size:12px;color:var(--text-soft);margin-top:6px;line-height:1.5}
.modal-account .modal-actions{margin-top:26px;gap:12px}
.modal-account .modal-actions .btn{padding:11px 24px;border-radius:10px;font-size:14px}
@media (max-width:520px){
    .modal-account{padding:24px 18px 20px}
    .modal-account .modal-title{font-size:16px}
    .modal-account .form-input{font-size:13px;padding:11px 12px}
    .modal-account .code-input{font-size:17px!important;letter-spacing:4px}
    .modal-account .field-code{flex-direction:row;gap:6px}
    .modal-account .modal-send-btn{padding:10px 12px;font-size:12px}
}

/* 绑定微信二维码弹窗（精美·简洁） */
.modal-bindqr{
    max-width:340px;width:90vw;padding:30px 26px 26px;
    text-align:center;position:relative;
    background:var(--card);
    border-radius:18px;
    box-shadow:0 24px 60px rgba(31,36,48,.18);
}
.bindqr-title{
    font-size:17px;font-weight:700;color:var(--text);
    margin-bottom:18px;letter-spacing:.5px;
}
.bindqr-box{
    width:200px;height:200px;margin:0 auto 16px;
    background:#fff;border:1px solid var(--border);
    border-radius:14px;display:flex;align-items:center;justify-content:center;
    overflow:hidden;position:relative;
    box-shadow:0 6px 18px rgba(31,36,48,.06);
}
.bindqr-box img{width:184px;height:184px;display:block}
.bindqr-loading{font-size:13px;color:var(--text-soft)}
.bindqr-tip{
    font-size:12.5px;color:var(--text-soft);line-height:1.6;
    margin:0 auto;max-width:240px;
}
.bindqr-status{
    font-size:12.5px;color:var(--text-soft);margin-top:12px;min-height:18px;
    transition:color .2s;
}
.bindqr-status.ok{color:var(--ok);font-weight:600}
.bindqr-status.err{color:var(--err)}

.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px;padding:0}

/* 头像剪裁弹窗 */
.crop-modal{max-width:520px;width:92%;position:relative}
.crop-container{
    width:100%;height:400px;background:var(--bg-soft);
    border-radius:var(--radius-sm);overflow:hidden;
    margin:16px 0 8px;position:relative;
}
.crop-container img{max-width:100%;display:block}
.crop-info{font-size:12px;color:var(--text-soft);text-align:center;margin-bottom:16px;min-height:18px}
.modal-close{
    position:absolute;top:10px;right:14px;background:none;border:none;
    font-size:24px;color:var(--text-soft);cursor:pointer;line-height:1;
    width:32px;height:32px;display:flex;align-items:center;justify-content:center;
    border-radius:50%;transition:all .2s;z-index:2;
}
.modal-close:hover{color:var(--text);background:var(--bg-soft)}
/* 实名认证 查看 弹窗 */
.realname-display{
    padding:18px 16px;background:var(--bg-soft);
    border-radius:12px;text-align:center;border:1px solid var(--border);
    margin-bottom:6px;
}
.realname-display .realname-label{font-size:12px;color:var(--text-soft);margin-bottom:6px;letter-spacing:.5px}
.realname-display .realname-name{font-size:22px;font-weight:800;color:var(--text);margin:4px 0 10px;letter-spacing:2px}
.realname-display .realname-meta{font-size:12.5px;color:var(--text-soft);display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* 注销账号 二次确认弹窗（红色危险主题） */
.modal-danger{border-top:3px solid var(--err)}
.modal-danger .modal-title{color:var(--err)}
.modal-danger .modal-title::before{background:linear-gradient(180deg,var(--err) 0%,#b91c1c 100%)!important}
.modal-danger .modal-sub{background:var(--err-bg);border-left-color:var(--err)}
.btn-danger{
    padding:10px 26px;border-radius:var(--radius-sm);border:none;
    font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    background:var(--err);color:#fff;
    box-shadow:0 4px 12px rgba(239,68,68,.25);
}
.btn-danger:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(239,68,68,.35);background:#dc2626}
.btn-danger[disabled]{opacity:.55;cursor:not-allowed;transform:none!important;box-shadow:none!important}

/* cropper.js 内部样式微调 */
.cropper-bg{background-image:none}
.cropper-view-box{outline:2px solid var(--brand);outline-color:rgba(79,124,255,.85)}

/* 响应式 */
@media (max-width:820px){
    .st-wrap{flex-direction:column;margin-top:18px;padding:0 16px}
    .st-sidebar{width:100%;display:flex;padding:8px;position:static}
    .st-sidebar-title{display:none}
    .st-menu-item{flex:1;justify-content:center;margin:0 2px;padding:10px 8px;font-size:13px}
    .st-menu-ico{display:none}
    .st-panel{padding:24px 20px 32px}
    .form-row{flex-direction:column;gap:8px}
    .form-label{text-align:left;padding-top:0;width:auto}
    .form-actions{padding-left:0}
    .flash{margin-left:20px;margin-right:20px}
}