/* ============================================================
   海丞 AI · iOS 设计系统 v2.0
   品牌紫 #6C5CE7 → #8B7CF6 · 毛玻璃 · iOS 系统色 · 柔和阴影
   ============================================================ */
:root{
  --primary:#6C5CE7;
  --primary-strong:#5B4BD6;
  --primary-soft:rgba(108,92,231,.10);
  --primary-softer:rgba(108,92,231,.06);
  --accent:#8B7CF6;
  --grad:linear-gradient(135deg,#6C5CE7 0%,#8B7CF6 100%);
  --bg:#F5F5F7;
  --bg2:#FAFAFC;
  --surface:#FFFFFF;
  --border:rgba(60,60,67,.12);
  --text:#1D1D1F;
  --text-2:#86868B;
  --text-3:#AEAEB2;
  --text-4:#C7C7CC;
  --success:#34C759;
  --danger:#FF3B30;
  --warning:#FF9500;
  --blue:#007AFF;
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 28px rgba(0,0,0,.06);
  --shadow-hover:0 2px 6px rgba(0,0,0,.06),0 16px 40px rgba(0,0,0,.10);
  --shadow-lg:0 12px 36px rgba(108,92,231,.18);
  --glass:rgba(255,255,255,.72);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Helvetica Neue",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
button{font-family:var(--font);cursor:pointer}
img{max-width:100%}
input,select,textarea{font-family:var(--font)}

/* ---------- 顶栏（毛玻璃） ---------- */
.topbar{position:sticky;top:0;z-index:50;background:var(--glass);backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border-bottom:1px solid var(--border);height:58px;display:flex;align-items:center;padding:0 24px;gap:16px}
.topbar .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--text);white-space:nowrap;letter-spacing:-.3px}
.brand-badge{width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;box-shadow:0 4px 12px rgba(108,92,231,.3)}
.topbar nav{display:flex;gap:2px;margin-left:8px;flex:1;overflow-x:auto;padding:4px 0}
.topbar nav a{padding:8px 14px;border-radius:10px;color:var(--text-2);font-weight:500;font-size:14px;white-space:nowrap;transition:all .2s}
.topbar nav a:hover{color:var(--text);background:var(--primary-softer)}
.topbar nav a.active{color:var(--primary);background:var(--primary-soft);font-weight:600}
.topbar .right{display:flex;align-items:center;gap:10px;margin-left:auto}
.user-chip{display:flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--primary-soft);font-size:13px;font-weight:600;color:var(--primary)}
.points-chip{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:rgba(255,149,0,.1);color:var(--warning);font-size:13px;font-weight:600}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--grad);color:#fff;border:none;border-radius:12px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .2s;box-shadow:0 4px 14px rgba(108,92,231,.25)}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(108,92,231,.35);color:#fff}
.btn:active{transform:scale(.97)}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:14px}
.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border);box-shadow:none}
.btn-ghost:hover{background:var(--surface);color:var(--text);box-shadow:none;transform:none}
.btn-soft{background:var(--primary-soft);color:var(--primary);box-shadow:none}
.btn-soft:hover{background:rgba(108,92,231,.16);color:var(--primary);box-shadow:none;transform:none}
.btn-success{background:var(--success);box-shadow:0 4px 14px rgba(52,199,89,.25)}
.btn-danger{background:var(--danger);box-shadow:0 4px 14px rgba(255,59,48,.25)}
.btn-block{width:100%}

/* ---------- 首页 Hero ---------- */
.hero{padding:44px 24px 24px;text-align:center;max-width:1080px;margin:0 auto}
.hero h1{font-size:34px;font-weight:800;letter-spacing:-.5px;line-height:1.25}
.hero h1 .grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--text-2);margin-top:10px;font-size:15px}
.agent-tabs{display:flex;gap:6px;justify-content:center;margin:28px 0 0;flex-wrap:wrap;padding:4px;background:var(--bg2);border-radius:14px;width:fit-content;margin-left:auto;margin-right:auto;border:1px solid var(--border)}
.agent-tab{display:flex;align-items:center;gap:8px;padding:10px 20px;border-radius:11px;background:transparent;font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;transition:all .25s;white-space:nowrap}
.agent-tab:hover{color:var(--text)}
.agent-tab.active{background:var(--surface);color:var(--primary);box-shadow:0 2px 8px rgba(0,0,0,.08)}
.agent-tab .ic{font-size:17px;display:inline-flex}

/* ---------- 创作区 ---------- */
.create-box{max-width:960px;margin:20px auto 48px;padding:0 24px}
.create-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .3s}
.create-card:hover{box-shadow:var(--shadow-hover)}
.create-tabs{display:flex;border-bottom:1px solid var(--border);background:var(--bg2)}
.create-tabs button{flex:1;padding:14px;background:none;border:none;font-size:14px;font-weight:600;color:var(--text-2);border-bottom:2.5px solid transparent;transition:all .2s}
.create-tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}
.create-body{padding:24px}
.input-wrap{display:flex;gap:10px}
.input-wrap textarea{flex:1;border:1.5px solid transparent;border-radius:14px;padding:14px 16px;font-size:15px;resize:vertical;min-height:56px;outline:none;transition:all .25s;background:var(--bg);color:var(--text);line-height:1.6}
.input-wrap textarea:focus{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.input-wrap textarea::placeholder{color:var(--text-4)}
.send-btn{width:52px;height:52px;border-radius:14px;background:var(--grad);color:#fff;border:none;font-size:19px;flex-shrink:0;transition:all .2s;box-shadow:0 4px 14px rgba(108,92,231,.3);display:flex;align-items:center;justify-content:center}
.send-btn:hover{transform:scale(1.05);box-shadow:0 6px 20px rgba(108,92,231,.4)}
.send-btn:active{transform:scale(.95)}
.send-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.option-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:16px;align-items:center}
.opt-group{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);font-weight:500}
.opt-group select,.opt-group input[type=text]{border:1px solid var(--border);border-radius:10px;padding:7px 12px;font-size:13px;outline:none;background:var(--surface);color:var(--text);transition:border-color .2s}
.opt-group select:focus,.opt-group input[type=text]:focus{border-color:var(--primary)}
.quick-chips{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.quick-chip{padding:7px 14px;border-radius:999px;background:var(--bg2);border:1px solid var(--border);font-size:12.5px;color:var(--text-2);cursor:pointer;transition:all .2s;font-weight:500}
.quick-chip:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* ---------- 结果区 ---------- */
.result-area{margin-top:20px}
.result-card{background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:20px}
.result-loading{display:flex;align-items:center;gap:12px;color:var(--text-2)}
.spinner{width:20px;height:20px;border:2.5px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 通用卡片 / 网格 ---------- */
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow);overflow:hidden;transition:all .25s}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card .card-body{padding:16px}
.card h3{font-size:15px;font-weight:700;margin-bottom:6px}
.card .meta{font-size:12px;color:var(--text-3)}
.card-img{width:100%;height:150px;object-fit:cover;background:var(--bg2)}
.tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:600;background:var(--primary-soft);color:var(--primary)}
.tag.green{background:rgba(52,199,89,.12);color:var(--success)}
.tag.red{background:rgba(255,59,48,.12);color:var(--danger)}
.tag.gray{background:var(--bg2);color:var(--text-2)}
.tag.orange{background:rgba(255,149,0,.12);color:var(--warning)}

/* ---------- 页面容器 ---------- */
.page{max-width:1080px;margin:0 auto;padding:24px}
.page-title{font-size:24px;font-weight:800;margin-bottom:18px;letter-spacing:-.3px}
.section-title{font-size:17px;font-weight:700;margin:24px 0 14px;letter-spacing:-.2px}

/* ---------- 认证页 ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:24px;position:relative;overflow:hidden}
.auth-wrap::before{content:"";position:absolute;top:-100px;right:-100px;width:400px;height:400px;border-radius:50%;background:var(--primary-soft);filter:blur(80px)}
.auth-wrap::after{content:"";position:absolute;bottom:-100px;left:-100px;width:350px;height:350px;border-radius:50%;background:rgba(139,124,246,.08);filter:blur(80px)}
.auth-card{background:var(--surface);border-radius:24px;box-shadow:var(--shadow-lg);width:100%;max-width:420px;padding:36px 32px;position:relative;z-index:1;border:1px solid var(--border)}
.auth-card .brand{display:flex;align-items:center;gap:10px;justify-content:center;font-weight:800;font-size:20px;margin-bottom:6px;color:var(--text)}
.auth-card .sub{text-align:center;color:var(--text-2);font-size:13px;margin-bottom:24px}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-size:13px;color:var(--text);font-weight:600;margin-bottom:6px}
.form-field input{width:100%;padding:12px 16px;border:1.5px solid transparent;border-radius:12px;font-size:14px;outline:none;background:var(--bg);color:var(--text);transition:all .25s}
.form-field input:focus{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.auth-switch{text-align:center;margin-top:18px;font-size:13px;color:var(--text-2)}
.alert{padding:10px 14px;border-radius:12px;font-size:13px;margin-bottom:14px}
.alert.err{background:rgba(255,59,48,.08);color:var(--danger);border:1px solid rgba(255,59,48,.15)}
.alert.ok{background:rgba(52,199,89,.08);color:var(--success);border:1px solid rgba(52,199,89,.15)}

/* ---------- 聊天 ---------- */
.chat-shell{max-width:880px;margin:0 auto;padding:16px 24px;display:flex;flex-direction:column;height:calc(100vh - 58px)}
.chat-history{flex:1;overflow-y:auto;padding:16px 0;display:flex;flex-direction:column;gap:14px}
.msg{max-width:78%;padding:12px 16px;border-radius:16px;font-size:14px;white-space:pre-wrap;word-break:break-word;line-height:1.7}
.msg.user{align-self:flex-end;background:var(--grad);color:#fff;border-bottom-right-radius:5px;box-shadow:0 4px 14px rgba(108,92,231,.25)}
.msg.ai{align-self:flex-start;background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:5px;box-shadow:var(--shadow)}
.chat-input{display:flex;gap:10px;padding:14px;background:var(--surface);border-radius:16px;border:1px solid var(--border);margin-top:auto;box-shadow:var(--shadow)}
.chat-input textarea{flex:1;border:none;background:transparent;outline:none;font-size:14px;resize:none;max-height:120px;padding:8px;color:var(--text)}
.chat-input .send-btn{width:44px;height:44px;border-radius:12px}
.session-list{width:220px;flex-shrink:0;border-right:1px solid var(--border);padding:12px;overflow-y:auto;background:var(--bg2)}
.session-item{padding:10px 12px;border-radius:10px;font-size:13px;cursor:pointer;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:2px;transition:all .15s}
.session-item:hover{background:var(--primary-soft);color:var(--text)}
.session-item.active{background:var(--primary-soft);color:var(--primary);font-weight:600}

/* ---------- 管理后台（保留暗色侧栏） ---------- */
.admin-shell{display:flex;min-height:100vh}
.admin-side{width:220px;background:#111827;color:#D1D5DB;padding:20px 14px;flex-shrink:0}
.admin-side .a-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:16px;margin-bottom:24px}
.admin-side a{display:block;padding:10px 14px;border-radius:10px;color:#9CA3AF;font-size:14px;margin-bottom:2px}
.admin-side a:hover{background:rgba(255,255,255,.06);color:#fff}
.admin-side a.active{background:var(--primary);color:#fff}
.admin-main{flex:1;padding:24px;max-width:1200px}
.admin-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;margin-bottom:18px}
.admin-card h3{font-size:15px;font-weight:700;margin-bottom:14px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{text-align:left;padding:10px 12px;background:var(--bg2);color:var(--text-2);font-weight:600;border-bottom:1px solid var(--border)}
.tbl td{padding:10px 12px;border-bottom:1px solid var(--border)}
.tbl tr:hover td{background:var(--bg2)}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:700}
.badge.on{background:rgba(52,199,89,.12);color:var(--success)}
.badge.off{background:rgba(255,59,48,.12);color:var(--danger)}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;margin-bottom:18px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px}
.stat-card .num{font-size:26px;font-weight:800;margin-top:4px}
.stat-card .lbl{font-size:12.5px;color:var(--text-2);display:flex;align-items:center;gap:6px}
.stat-card .sic{width:28px;height:28px;border-radius:8px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;margin-right:2px}
.hint-item{padding:10px 14px;border-radius:12px;background:rgba(255,149,0,.08);color:var(--warning);border:1px solid rgba(255,149,0,.15);margin-bottom:8px}
.pts{display:inline-flex;align-items:center;gap:4px;font-weight:700}
.section-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px;padding:4px;background:var(--bg2);border-radius:12px;width:fit-content;border:1px solid var(--border)}
.section-tabs a{padding:8px 16px;border-radius:9px;background:transparent;color:var(--text-2);font-size:13px;font-weight:600;transition:all .2s;border:none}
.section-tabs a.active{background:var(--surface);color:var(--primary);box-shadow:0 1px 4px rgba(0,0,0,.06)}

/* ---------- 工具类 ---------- */
.muted{color:var(--text-2)}.small{font-size:12px}
.hidden{display:none!important}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}
.flex{display:flex}.between{justify-content:space-between}.center{align-items:center}
.gap8{gap:8px}.gap12{gap:12px}
.text-center{text-align:center}
.empty{padding:50px 20px;text-align:center;color:var(--text-3)}
.empty .big{font-size:40px;margin-bottom:10px}
.pagination{display:flex;gap:6px;justify-content:center;margin-top:20px}
.pagination button,.pagination span{padding:8px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface);font-size:13px;color:var(--text-2);transition:all .2s}
.pagination button:hover{border-color:var(--primary);color:var(--primary)}
.pagination .cur{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(108,92,231,.3)}
.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;z-index:100}
.modal-mask.show{display:flex}
.modal{background:var(--surface);border-radius:20px;padding:28px;width:100%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:0 24px 64px rgba(0,0,0,.2)}
.modal h3{margin-bottom:14px;font-size:18px;font-weight:700}
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-20px);background:rgba(29,29,31,.92);backdrop-filter:blur(20px);color:#fff;padding:12px 24px;border-radius:14px;font-size:13px;z-index:200;opacity:0;transition:all .3s cubic-bezier(.4,0,.2,1);pointer-events:none;font-weight:500;box-shadow:0 8px 32px rgba(0,0,0,.2)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 响应式 ---------- */
@media(max-width:768px){
  .topbar{padding:0 16px;height:54px}
  .topbar nav{display:none}
  .topbar .brand .nm-text{display:none}
  .hero{padding:32px 16px 20px}
  .hero h1{font-size:26px}
  .agent-tabs{gap:4px;padding:3px}
  .agent-tab{padding:8px 14px;font-size:13px}
  .create-box{padding:0 16px}
  .create-body{padding:18px}
  .input-wrap textarea{font-size:14px;padding:12px 14px}
  .admin-side{width:64px}
  .admin-side a span{display:none}
  .grid-3{grid-template-columns:1fr}
  .chat-shell{padding:12px 16px}
  .session-list{width:180px}
  .auth-card{padding:28px 24px}
}