/* ============================================================
   全新 UI 设计系统 v2.0 —— 靛蓝科技风
   配色：靛蓝 #6366f1 → 紫 #8b5cf6 渐变主色，深海军蓝点缀
   ============================================================ */
:root{
  --primary:#6366f1; --primary-dark:#4f46e5; --primary-deep:#4338ca;
  --accent:#06b6d4; --violet:#8b5cf6;
  --grad-primary:linear-gradient(135deg,#6366f1,#8b5cf6);
  --grad-accent:linear-gradient(135deg,#06b6d4,#3b82f6);
  --grad-dark:linear-gradient(135deg,#0f172a,#1e1b4b 60%,#312e81);
  --bg:#f5f7fc; --bg-soft:#eef1f8; --card:#ffffff;
  --text:#0f172a; --text-2:#334155; --muted:#64748b; --muted-2:#94a3b8;
  --border:#e5e9f2; --border-strong:#cbd5e1;
  --success:#10b981; --success-bg:#ecfdf5;
  --danger:#ef4444; --danger-bg:#fef2f2;
  --warning:#f59e0b; --warning-bg:#fffbeb;
  --info:#3b82f6; --info-bg:#eff6ff;
  --shadow-xs:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 1px 3px rgba(15,23,42,.08),0 8px 24px -12px rgba(99,102,241,.18);
  --shadow-hover:0 8px 24px -8px rgba(99,102,241,.28),0 2px 6px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px -16px rgba(49,46,129,.35);
  --radius:14px; --radius-sm:9px; --radius-lg:20px;
  --nav-h:64px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

/* ---------- 基础 ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;font-size:15px}
a{color:var(--primary-dark);text-decoration:none;transition:color .15s}
a:hover{color:var(--primary-deep)}
img{max-width:100%}
::selection{background:rgba(99,102,241,.22)}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.text-center{text-align:center}
.mt-2{margin-top:8px}.mt-3{margin-top:16px}.mt-4{margin-top:24px}
.mb-2{margin-bottom:8px}.mb-3{margin-bottom:16px}.mb-4{margin-bottom:24px}

/* ---------- 导航栏 ---------- */
.navbar{background:rgba(255,255,255,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:60;box-shadow:var(--shadow-xs)}
.navbar-inner{display:flex;align-items:center;gap:20px;height:var(--nav-h)}
.brand{font-size:19px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:10px;letter-spacing:.5px}
.brand .logo{width:34px;height:34px;border-radius:11px;background:var(--grad-primary);display:inline-flex;
  align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(99,102,241,.4);flex:none}
.brand .logo svg{width:20px;height:20px}
.nav-links{display:flex;gap:2px;flex:1;align-items:center}
.nav-links a{color:var(--text-2);padding:9px 15px;border-radius:10px;font-size:14.5px;font-weight:500;position:relative;transition:all .18s}
.nav-links a:hover{background:rgba(99,102,241,.09);color:var(--primary-deep)}
.nav-links a.active{background:rgba(99,102,241,.12);color:var(--primary-deep);font-weight:700}
.nav-user{display:flex;align-items:center;gap:10px;font-size:14px}
.username{color:var(--muted);font-weight:500;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.balance{color:#047857;font-weight:700;background:var(--success-bg);border:1px solid #a7f3d0;padding:5px 14px;border-radius:999px;font-size:13px;transition:all .18s}
.balance:hover{background:#d1fae5;transform:translateY(-1px)}
.msg{color:var(--warning);font-weight:600}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{display:block;width:22px;height:2.5px;background:var(--text);border-radius:2px;margin:5px 0;transition:all .2s}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 22px;border-radius:10px;
  border:1px solid var(--border-strong);background:#fff;color:var(--text);cursor:pointer;font-size:14.5px;font-weight:600;
  font-family:var(--font);transition:all .18s;box-shadow:var(--shadow-xs);line-height:1.4;white-space:nowrap}
.btn:hover{transform:translateY(-1.5px);box-shadow:var(--shadow);border-color:var(--primary)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-primary{background:var(--grad-primary);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(99,102,241,.35)}
.btn-primary:hover{background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;border-color:transparent;box-shadow:0 8px 22px rgba(99,102,241,.45)}
.btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(239,68,68,.3)}
.btn-danger:hover{color:#fff;box-shadow:0 8px 22px rgba(239,68,68,.4)}
.btn-success{background:linear-gradient(135deg,#10b981,#059669);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(16,185,129,.3)}
.btn-success:hover{color:#fff;box-shadow:0 8px 22px rgba(16,185,129,.4)}
.btn-ghost{background:transparent;border-color:transparent;box-shadow:none;color:var(--primary-dark)}
.btn-ghost:hover{background:rgba(99,102,241,.09)}
.btn-light{background:var(--bg-soft);border-color:transparent}
.btn-sm{padding:7px 15px;font-size:13px;border-radius:8px}
.btn-lg{padding:13px 34px;font-size:16px;border-radius:12px}
.btn-block{width:100%}
.link{background:none;border:none;color:var(--primary-dark);cursor:pointer;font-size:14px;padding:0;font-weight:500;font-family:var(--font)}
.link:hover{text-decoration:underline}
.link.danger{color:var(--danger)}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border-radius:var(--radius);padding:26px;border:1px solid var(--border);
  box-shadow:var(--shadow);transition:box-shadow .22s,transform .22s;position:relative}
.card:hover{box-shadow:var(--shadow-hover)}
.card h3{font-size:16.5px;margin-bottom:14px;font-weight:700;display:flex;align-items:center;gap:8px}
.card h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--grad-primary);flex:none}
.card .price{color:var(--danger);font-size:28px;font-weight:800;letter-spacing:-.5px}
.card .price small{font-size:13px;color:var(--muted);font-weight:400}
.card .meta{color:var(--muted);font-size:13.5px;margin:10px 0 14px;line-height:1.7}

/* ---------- 表单 ---------- */
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:7px;font-size:14px;font-weight:600;color:var(--text-2)}
.form-control{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:14.5px;
  font-family:var(--font);color:var(--text);background:#fff;transition:border-color .18s,box-shadow .18s}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(99,102,241,.14)}
.form-control::placeholder{color:var(--muted-2)}
select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
textarea.form-control{min-height:120px;resize:vertical}
input[type="checkbox"].form-control,input[type="checkbox"]{accent-color:var(--primary);width:17px;height:17px;cursor:pointer}
.qty-input{max-width:150px}

/* 开关式 checkbox */
input[type="checkbox"]#autoRenewToggle{appearance:none;width:44px;height:24px;border-radius:999px;background:#cbd5e1;
  position:relative;cursor:pointer;transition:background .2s;flex:none;vertical-align:middle}
input[type="checkbox"]#autoRenewToggle::after{content:"";position:absolute;top:2px;left:2px;width:20px;height:20px;
  border-radius:50%;background:#fff;box-shadow:0 2px 5px rgba(0,0,0,.25);transition:left .2s}
input[type="checkbox"]#autoRenewToggle:checked{background:var(--grad-primary)}
input[type="checkbox"]#autoRenewToggle:checked::after{left:22px}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);background:#fff;box-shadow:var(--shadow-xs)}
.table{width:100%;border-collapse:collapse;background:#fff;font-size:14px;min-width:640px}
.table th,.table td{padding:13px 16px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
.table th{background:#f8fafd;color:var(--muted);font-weight:600;font-size:13px;letter-spacing:.3px;position:sticky;top:0}
.table tbody tr{transition:background .15s}
.table tbody tr:hover{background:rgba(99,102,241,.045)}
.table tbody tr:last-child td{border-bottom:none}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.2px}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.7}
.badge-active,.badge-paid,.badge-ok{background:var(--success-bg);color:#047857}
.badge-unpaid,.badge-open{background:var(--warning-bg);color:#b45309}
.badge-failed,.badge-cancelled,.badge-suspended{background:var(--danger-bg);color:#b91c1c}
.badge-pending{background:#eef2ff;color:#4338ca}
.badge-replied{background:var(--info-bg);color:#1d4ed8}
.badge-closed{background:#f1f5f9;color:#475569}
.badge-hot{background:var(--danger-bg);color:#b91c1c}

/* ---------- 提示框 ---------- */
.alert{padding:14px 18px;border-radius:12px;margin:18px 0;font-size:14px;border:1px solid;display:flex;gap:10px;align-items:flex-start;animation:slideDown .3s ease}
.alert-error{background:var(--danger-bg);color:#991b1b;border-color:#fecaca}
.alert-success{background:var(--success-bg);color:#065f46;border-color:#a7f3d0}
.alert-warning{background:var(--warning-bg);color:#92400e;border-color:#fde68a}
.alert-info{background:var(--info-bg);color:#1e40af;border-color:#bfdbfe}
.notice{background:var(--warning-bg);border:1px solid #fde68a;border-radius:12px;padding:13px 18px;font-size:14px;margin-bottom:18px;color:#92400e}

/* ---------- Hero ---------- */
.hero{background:var(--grad-dark);color:#fff;padding:88px 0 96px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 75%)}
.hero::after{content:"";position:absolute;width:560px;height:560px;border-radius:50%;filter:blur(120px);opacity:.5;
  background:radial-gradient(circle,#6366f1,transparent 70%);top:-180px;left:50%;transform:translateX(-50%);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  padding:7px 18px;border-radius:999px;font-size:13px;margin-bottom:22px;backdrop-filter:blur(6px)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 10px #34d399;animation:pulse 2s infinite}
.hero h1{font-size:clamp(30px,5vw,50px);margin-bottom:16px;font-weight:800;letter-spacing:-1px;line-height:1.25}
.hero h1 .grad{background:linear-gradient(90deg,#a5b4fc,#e0e7ff,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{opacity:.82;margin-bottom:32px;font-size:16.5px;max-width:560px;margin-left:auto;margin-right:auto}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero .btn-primary{background:#fff;color:var(--primary-deep);border:none;font-weight:700;padding:13px 38px;font-size:15.5px}
.hero .btn-primary:hover{background:#eef2ff;box-shadow:0 12px 30px rgba(0,0,0,.3)}
.hero .btn-outline-light{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.3);color:#fff}
.hero .btn-outline-light:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.5);color:#fff}
.hero-stats{display:flex;gap:48px;justify-content:center;margin-top:56px;flex-wrap:wrap}
.hero-stats .hs{text-align:center}
.hero-stats .hs b{font-size:30px;font-weight:800;display:block;background:linear-gradient(90deg,#c7d2fe,#e0e7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .hs span{font-size:13px;opacity:.65}

/* ---------- 内容区 ---------- */
.section{padding:64px 0}
.section h2{text-align:center;margin-bottom:10px;font-size:29px;font-weight:800;letter-spacing:-.5px}
.section .section-desc{text-align:center;color:var(--muted);margin-bottom:40px;font-size:15.5px;max-width:600px;margin-left:auto;margin-right:auto}
.article{max-width:860px;margin:0 auto}
.article-body{font-size:15.5px;line-height:2;color:var(--text-2)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:22px}

/* 产品卡片增强 */
.product-card{overflow:hidden;padding:0;display:flex;flex-direction:column}
.product-card .pc-top{height:6px;background:var(--grad-primary)}
.product-card .pc-body{padding:24px;display:flex;flex-direction:column;flex:1}
.product-card:hover{transform:translateY(-5px)}
.product-card h3{font-size:17px;margin-bottom:8px}
.product-card .price{margin:6px 0 4px}

/* 特性卡 */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin-top:8px}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 22px;text-align:center;transition:all .22s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#c7d2fe}
.feature-card .fi{width:52px;height:52px;border-radius:15px;background:rgba(99,102,241,.1);display:inline-flex;
  align-items:center;justify-content:center;margin-bottom:14px}
.feature-card .fi svg{width:26px;height:26px}
.feature-card h4{font-size:16px;margin-bottom:8px}
.feature-card p{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ---------- kv 详情行 ---------- */
.kv{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:11px 2px;border-bottom:1px dashed var(--border);font-size:14.5px}
.kv:last-child{border-bottom:none}
.kv span:first-child{color:var(--muted);flex:none}
.kv span:last-child{text-align:right;word-break:break-all;font-weight:500}

/* ---------- 选项组 / 操作按钮 ---------- */
.opt-group{margin-bottom:18px}
.opt-group .opt-title{font-weight:700;margin-bottom:10px;font-size:14.5px}
.opt-list{display:flex;flex-wrap:wrap;gap:10px}
.opt-item{padding:10px 18px;border:1.5px solid var(--border);border-radius:10px;cursor:pointer;font-size:14px;background:#fff;transition:all .16s;font-weight:500}
.opt-item:hover{border-color:var(--primary)}
.opt-item.selected{border-color:var(--primary);color:var(--primary-deep);background:#eef2ff;box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.opt-item small{color:var(--muted);display:block;font-weight:400}
.action-btns{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.host-action{position:relative}

/* ---------- Tabs / 分页 ---------- */
.tabs{display:flex;gap:8px;margin-bottom:22px;flex-wrap:wrap}
.tabs a{padding:9px 18px;border-radius:10px;background:#fff;border:1px solid var(--border);font-size:14px;color:var(--text-2);font-weight:500;transition:all .16s}
.tabs a:hover{border-color:var(--primary);color:var(--primary-deep)}
.tabs a.active{background:var(--grad-primary);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(99,102,241,.3)}
.pagination{display:flex;gap:8px;justify-content:center;margin:28px 0;flex-wrap:wrap}
.pagination a,.pagination span{padding:9px 15px;border-radius:10px;background:#fff;border:1px solid var(--border);font-size:14px;font-weight:500;min-width:42px;text-align:center;transition:all .16s}
.pagination a:hover{border-color:var(--primary);color:var(--primary-deep)}
.pagination span.current,.pagination span.cur{background:var(--grad-primary);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(99,102,241,.3)}

/* ---------- 页头 / 列表 / 空态 ---------- */
.page-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:12px}
.page-head h2{font-size:21px;font-weight:800}
.list{list-style:none;margin:0;padding:0}
.list-item{display:flex;justify-content:space-between;align-items:center;padding:14px 6px;border-bottom:1px solid var(--border);gap:12px}
.list-item:last-child{border-bottom:none}
.list-item a{font-size:15px;font-weight:500}
.empty{text-align:center;color:var(--muted-2);padding:56px 20px;font-size:14.5px}
.empty::before{content:"📦";font-size:40px;display:block;margin-bottom:12px;opacity:.5}

/* ---------- 详情布局 ---------- */
.detail-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:24px;align-items:start}
.detail-head{display:flex;align-items:center;gap:14px;margin-bottom:22px;flex-wrap:wrap}
.detail-head h2{font-size:22px;font-weight:800}
.panel-sec{margin-top:26px;padding-top:22px;border-top:1px solid var(--border)}
.panel-sec>h3{font-size:16px;margin-bottom:14px}

/* ---------- 登录注册 ---------- */
.auth-wrap{min-height:calc(100vh - var(--nav-h) - 120px);display:flex;align-items:center;justify-content:center;padding:48px 20px;
  background:radial-gradient(ellipse 60% 50% at 50% 0%,rgba(99,102,241,.1),transparent),var(--bg)}
.auth-box{max-width:430px;width:100%;margin:0 auto}
.auth-card{background:#fff;border-radius:var(--radius-lg);padding:40px 36px;border:1px solid var(--border);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.auth-card::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--grad-primary)}
.auth-logo{width:56px;height:56px;border-radius:17px;background:var(--grad-primary);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;box-shadow:0 8px 20px rgba(99,102,241,.4)}
.auth-card h2{text-align:center;margin-bottom:6px;font-size:22px;font-weight:800}
.auth-sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:28px}
.auth-box .card{margin:60px auto;max-width:430px;padding:36px}

/* ---------- 页脚 ---------- */
.footer{background:#0f172a;color:#94a3b8;padding:56px 0 28px;margin-top:72px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer .f-brand{color:#fff;font-size:18px;font-weight:800;display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer .f-desc{font-size:13.5px;line-height:1.8;max-width:300px}
.footer h5{color:#fff;font-size:14px;margin-bottom:14px;font-weight:700}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul a{color:#94a3b8;font-size:13.5px}
.footer ul a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;padding-top:22px;text-align:center;font-size:13px;color:#64748b}

/* ---------- 后台 ---------- */
.admin-layout{display:flex;min-height:100vh;background:var(--bg)}
.sidebar{width:236px;background:linear-gradient(180deg,#0f172a,#1e1b4b);color:#cbd5e1;position:fixed;top:0;bottom:0;
  padding:0;display:flex;flex-direction:column;z-index:50}
.sidebar .brand2{padding:20px;color:#fff;font-size:17px;font-weight:800;border-bottom:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;gap:10px}
.sidebar .brand2 .logo{width:30px;height:30px;border-radius:9px;background:var(--grad-primary);display:inline-flex;align-items:center;justify-content:center;flex:none}
.sidebar nav{padding:14px 12px;overflow-y:auto;flex:1}
.sidebar nav a{display:flex;align-items:center;gap:11px;padding:10px 14px;border-radius:10px;color:#a5b4cb;font-size:14px;
  font-weight:500;margin-bottom:2px;transition:all .16s}
.sidebar nav a .ico{width:18px;height:18px;flex:none;opacity:.75}
.sidebar nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.sidebar nav a.active{background:var(--grad-primary);color:#fff;box-shadow:0 4px 14px rgba(99,102,241,.45)}
.sidebar nav a.active .ico{opacity:1}
.sidebar .nav-sec{padding:16px 14px 6px;font-size:11.5px;color:#5b6b85;letter-spacing:1.5px;font-weight:700}
.admin-main{margin-left:236px;flex:1;padding:0;min-width:0}
.admin-topbar{background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);
  padding:14px 30px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:40}
.admin-topbar h2{font-size:19px;font-weight:800;margin:0}
.admin-topbar .at-right{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--muted)}
.admin-content{padding:28px 30px;max-width:1280px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;position:relative;overflow:hidden;transition:all .2s}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.stat::after{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad-primary);opacity:.85}
.stat .num{font-size:27px;font-weight:800;letter-spacing:-.5px}
.stat .label{color:var(--muted);font-size:13px;margin-top:2px}
.bar-chart{display:flex;align-items:flex-end;gap:14px;height:180px;padding:20px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.bar-chart .bar{flex:1;background:linear-gradient(#a5b4fc,#6366f1);border-radius:7px 7px 0 0;position:relative;min-height:5px;transition:all .2s}
.bar-chart .bar:hover{filter:brightness(1.1)}
.bar-chart .bar span{position:absolute;bottom:-26px;left:50%;transform:translateX(-50%);font-size:12px;color:var(--muted);white-space:nowrap}
.reply{border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:14px;background:#fff;font-size:14.5px;box-shadow:var(--shadow-xs)}
.reply .meta{font-size:12.5px;color:var(--muted);margin-bottom:10px}
.reply.admin-reply{border-color:#c7d2fe;background:#eef2ff}
pre.log{background:#0f172a;color:#c7d2fe;padding:18px;border-radius:12px;overflow:auto;font-size:12.5px;max-height:440px;line-height:1.7;border:1px solid #1e293b}

/* ---------- FAQ / 文章 ---------- */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:12px;padding:0;margin-bottom:12px;background:#fff;overflow:hidden;transition:box-shadow .2s}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-item summary{cursor:pointer;font-weight:600;font-size:15.5px;padding:16px 20px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--primary);font-weight:300;flex:none;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--primary-deep)}
.faq-answer{padding:0 20px 18px;color:var(--text-2);font-size:14.5px;line-height:1.9;border-top:1px dashed var(--border);padding-top:14px;margin:0 20px 18px;padding-left:0;padding-right:0}

/* ---------- 在线客服 ---------- */
#chatFab{position:fixed;right:22px;bottom:22px;width:56px;height:56px;border-radius:50%;background:var(--grad-primary);color:#fff;
  font-size:25px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 24px rgba(99,102,241,.5);z-index:999;transition:transform .2s;border:none}
#chatFab:hover{transform:scale(1.08) rotate(6deg)}
#chatPanel{position:fixed;right:22px;bottom:90px;width:360px;max-width:calc(100vw - 44px);height:470px;background:#fff;
  border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;z-index:999}
.chat-head{background:var(--grad-primary);color:#fff;padding:13px 16px;display:flex;justify-content:space-between;align-items:center;font-weight:700}
.chat-head .btn{background:rgba(255,255,255,.2);color:#fff;border:none;margin-left:6px;box-shadow:none;padding:6px 12px}
.chat-head .btn:hover{background:rgba(255,255,255,.32)}
.chat-body{flex:1;overflow-y:auto;padding:14px;background:#f6f8fc}
.chat-msg{max-width:82%;padding:9px 14px;border-radius:14px;margin-bottom:10px;font-size:14px;line-height:1.65;word-break:break-word;animation:slideDown .25s ease}
.chat-msg.bot{background:#fff;border:1px solid var(--border);color:var(--text-2);border-bottom-left-radius:4px;box-shadow:var(--shadow-xs)}
.chat-msg.user{background:var(--grad-primary);color:#fff;margin-left:auto;border-bottom-right-radius:4px;box-shadow:0 3px 10px rgba(99,102,241,.3)}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);background:#fff}
.chat-input input{flex:1;border:1.5px solid var(--border);border-radius:10px;padding:10px 12px;font-size:14px;font-family:var(--font)}
.chat-input input:focus{outline:none;border-color:var(--primary)}

/* ---------- 模态框 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(3px);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s ease}
.modal{background:#fff;border-radius:var(--radius-lg);max-width:520px;width:100%;padding:30px;box-shadow:var(--shadow-lg);animation:popIn .25s ease}
.modal h3{margin-bottom:16px;font-size:18px}
.modal .modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:22px}

/* ---------- 动画 ---------- */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:scale(.95) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.fade-in{animation:fadeIn .4s ease}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .detail-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero{padding:64px 0 72px}
}
@media(max-width:760px){
  .nav-toggle{display:block}
  .nav-links{position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    padding:10px 16px 16px;border-bottom:1px solid var(--border);box-shadow:0 12px 28px rgba(15,23,42,.12);display:none;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;font-size:15px}
  .nav-user .username,.nav-user a:not(.btn):not(.balance){display:none}
  .nav-user{margin-left:0}
  .sidebar{transform:translateX(-100%);transition:transform .25s ease}
  .sidebar.open{transform:none}
  .admin-main{margin-left:0}
  .admin-content{padding:18px 16px}
  .admin-topbar{padding:12px 16px}
  .section{padding:44px 0}
  .card{padding:20px}
  .auth-card{padding:32px 24px}
  .hero-stats{gap:28px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr;gap:12px}
  .action-btns .btn{flex:1 1 calc(50% - 5px);justify-content:center}
}