/* 全站背景图 - 自动适配手机/平板/电脑 */
body {
    background: linear-gradient(rgba(10,14,26,0.5), rgba(10,14,26,0.9)), url('/Picture/huyitech-landscape.jpg') center center / cover no-repeat fixed !important;
}

/* 手机竖屏 - 用竖版图 */
@media (max-width: 768px) and (orientation: portrait) {
    body {
        background: linear-gradient(rgba(10,14,26,0.5), rgba(10,14,26,0.9)), url('/Picture/huyitech-portrait.jpg') center center / cover no-repeat fixed !important;
    }
}

/* ============================================================
   湖癔科技 · 企业管理系统 全局样式
   主题：湖癔科技蓝 (deep tech blue + cyan glow)
   适配：手机 / 平板 / 电脑 自动响应式
   ============================================================ */
:root{
  --bg:#0a0e1a;
  --bg2:#121828;
  --panel:rgba(18,24,40,.9);
  --panel-solid:#121828;
  --line:rgba(69,126,255,.2);
  --line-strong:rgba(69,126,255,.5);
  --brand:#457eff;          /* 湖癔科技蓝 */
  --brand2:#2f6bff;
  --brand-deep:#1f56d6;
  --lac:#2ea8ff;
  --text:#ffffff;
  --text-dim:#8899bb;
  --text-faint:#5a6b85;
  --ok:#16a34a;
  --warn:#d97706;
  --danger:#dc2626;
  --shadow:0 10px 40px rgba(31,86,214,.12);
  --radius:16px;
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
  font-family:var(--font);
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(69,126,255,.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(46,168,255,.08), transparent 55%),
    var(--bg);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--lac)}
button{font-family:var(--font);cursor:pointer;border:none}
input,textarea,select{font-family:var(--font);outline:none}
::selection{background:rgba(69,126,255,.3)}

/* ---------- 粒子画布 ---------- */
#particles{position:fixed;inset:0;z-index:0;pointer-events:none}
.app,.page{position:relative;z-index:1}

/* ---------- 通用容器 ---------- */
.wrap{max-width:1200px;margin:0 auto;padding:0 22px}
.glass{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:12px;font-size:15px;font-weight:600;
  color:#fff;background:linear-gradient(135deg,var(--brand2),var(--brand-deep));
  border:1px solid rgba(69,126,255,.4);transition:.25s;position:relative;overflow:hidden;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 26px rgba(2,132,199,.45)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent;border:1px solid var(--line-strong);color:var(--brand)}
.btn.ghost:hover{background:rgba(69,126,255,.1)}
.btn.danger{background:linear-gradient(135deg,#dc2626,#b91c1c);border-color:rgba(248,113,113,.4)}
.btn.ok{background:linear-gradient(135deg,#059669,#047857);border-color:rgba(52,211,153,.4)}
.btn.sm{padding:7px 14px;font-size:13px;border-radius:9px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn .ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.35);transform:scale(0);animation:rip .6s ease-out}
@keyframes rip{to{transform:scale(3);opacity:0}}

/* ---------- 输入 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:7px;letter-spacing:.3px}
.field label .req{color:var(--danger)}
.input,.select,.textarea{
  width:100%;padding:12px 14px;border-radius:11px;font-size:14px;color:var(--text);
  background:#ffffff;border:1px solid var(--line);transition:.2s;
}
.input::placeholder,.textarea::placeholder{color:var(--text-faint)}
.input:focus,.select:focus,.textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(69,126,255,.15)}
.textarea{resize:vertical;min-height:96px}
.select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2393b4d0' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");background-repeat:no-repeat;background-position:right 12px center}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--text)}
.logo .mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;overflow:hidden;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));box-shadow:0 4px 16px rgba(2,132,199,.5)}
.logo .mark img{width:100%;height:100%;object-fit:cover;display:block}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{padding:8px 14px;border-radius:9px;color:var(--text-dim);font-size:14px;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(69,126,255,.12)}
.nav-user{display:flex;align-items:center;gap:10px}
.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#ffffff}
.burger{display:none;background:none;color:var(--text);font-size:22px}

/* ---------- 徽章/标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge.ok{background:rgba(52,211,153,.14);color:var(--ok);border:1px solid rgba(52,211,153,.3)}
.badge.warn{background:rgba(251,191,36,.14);color:var(--warn);border:1px solid rgba(251,191,36,.3)}
.badge.danger{background:rgba(248,113,113,.14);color:var(--danger);border:1px solid rgba(248,113,113,.3)}
.badge.info{background:rgba(69,126,255,.14);color:var(--brand);border:1px solid rgba(69,126,255,.3)}
.tag{display:inline-block;padding:2px 9px;border-radius:6px;font-size:12px;background:rgba(69,126,255,.1);color:var(--brand);border:1px solid var(--line)}

/* ---------- 卡片 / 网格 ---------- */
.grid{display:grid;gap:18px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{padding:22px;transition:.25s}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.card h3{font-size:16px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.card h3 svg{width:18px;height:18px;flex:none}
.stat{display:flex;flex-direction:column;gap:6px}
.stat .num{font-size:34px;font-weight:800;background:linear-gradient(90deg,var(--lac),var(--brand));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.1}
.stat .lbl{font-size:13px;color:var(--text-dim)}
.stat .sub{font-size:12px;color:var(--ok)}
.stat .sub.down{color:var(--danger)}

/* ---------- 面板标题 ---------- */
.page-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;margin:26px 0 20px}
.page-head h2{font-size:24px;font-weight:800}
.page-head p{color:var(--text-dim);font-size:14px;margin-top:4px}
.section-title{font-size:18px;font-weight:700;margin:30px 0 16px;display:flex;align-items:center;gap:10px}
.section-title::before{content:"";width:4px;height:18px;border-radius:2px;background:linear-gradient(var(--brand),var(--brand-deep))}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;min-width:640px}
th,td{padding:12px 14px;text-align:left;font-size:13.5px;border-bottom:1px solid rgba(69,126,255,.08)}
th{color:var(--brand);background:rgba(69,126,255,.06);font-weight:600;white-space:nowrap;position:sticky;top:0}
tr:hover td{background:rgba(69,126,255,.04)}
td .row-title{font-weight:600;color:var(--text)}

/* ---------- 弹窗 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(23,35,61,.45);backdrop-filter:blur(6px);z-index:100;
  display:none;align-items:center;justify-content:center;padding:18px}
.modal-mask.open{display:flex;animation:fadein .2s}
.modal{width:100%;max-width:520px;max-height:90vh;overflow:auto;background:var(--panel-solid);
  border:1px solid var(--line-strong);border-radius:18px;padding:24px;box-shadow:var(--shadow);animation:pop .25s}
.modal h3{font-size:18px;margin-bottom:18px;padding-right:24px}
.modal-x{position:absolute;top:14px;right:16px;background:none;color:var(--text-dim);font-size:20px;line-height:1;padding:4px 8px;cursor:pointer;border-radius:8px}
.modal-x:hover{color:var(--text);background:rgba(69,126,255,.12)}

/* 身份选择 */
.choose-grid{display:grid;gap:12px;margin-top:6px}
.choose-item{display:flex;align-items:center;gap:14px;padding:16px;border-radius:12px;cursor:pointer;
  background:#ffffff;border:1px solid var(--line);transition:.2s;text-align:left;color:var(--text);width:100%}
.choose-item:hover{border-color:var(--brand);background:rgba(69,126,255,.1)}
.choose-item .ci{width:44px;height:44px;flex:none;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand2),var(--brand-deep));color:#ffffff}
.choose-item .ct{font-size:15px;font-weight:700;display:block}
.choose-item .cd{font-size:12.5px;color:var(--text-dim);margin-top:3px;display:block;line-height:1.5}
.back-bar{margin-bottom:14px}
.back-btn{background:none;color:var(--brand);font-size:13px;padding:0;cursor:pointer}
.back-btn:hover{color:var(--lac)}
.guest-bar{margin-top:14px;text-align:center;padding-top:14px;border-top:1px dashed var(--line)}
.guest-btn{background:none;color:var(--text-dim);font-size:13px;cursor:pointer}
.guest-btn:hover{color:var(--brand)}
@keyframes pop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
@keyframes fadein{from{opacity:0}to{opacity:1}}

/* ---------- Toast ---------- */
#toasts{position:fixed;top:18px;right:18px;z-index:200;display:flex;flex-direction:column;gap:10px}
.toast{min-width:240px;max-width:360px;padding:13px 16px;border-radius:12px;font-size:14px;
  background:var(--panel-solid);border:1px solid var(--line-strong);box-shadow:var(--shadow);
  display:flex;align-items:center;gap:10px;animation:slidein .3s}
.toast.ok{border-color:rgba(52,211,153,.4)}.toast.ok .dot{background:var(--ok)}
.toast.err{border-color:rgba(248,113,113,.4)}.toast.err .dot{background:var(--danger)}
.toast.info .dot{background:var(--brand)}
.toast .dot{width:8px;height:8px;border-radius:50%;flex:none}
@keyframes slidein{from{transform:translateX(120%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ---------- 空状态 ---------- */
.empty{padding:46px 20px;text-align:center;color:var(--text-faint)}
.empty .ico{font-size:40px;margin-bottom:10px;opacity:.5}

/* ---------- 页脚 ---------- */
.footer{margin-top:60px;border-top:1px solid var(--line);padding:26px 0;text-align:center;color:var(--text-faint);font-size:13px}

/* ===================== 官网首页 & 登录 ===================== */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:120px 0 80px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(69,126,255,.1);border:1px solid var(--line-strong);color:var(--brand);font-size:13px;width:max-content;margin-bottom:22px}
.hero h1{font-size:clamp(34px,6vw,64px);font-weight:900;line-height:1.12;letter-spacing:.5px}
.hero h1 .grad{background:linear-gradient(90deg,var(--lac),var(--brand),var(--brand-deep));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .slogan{margin:20px 0 30px;color:var(--text-dim);font-size:clamp(15px,2vw,18px);max-width:640px;line-height:1.8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:56px}
.hstat{padding:20px;text-align:center}
.hstat .n{font-size:30px;font-weight:800;color:var(--lac)}
.hstat .t{font-size:13px;color:var(--text-dim);margin-top:4px}
.hstat .d{font-size:12px;color:var(--ok);margin-top:2px}

/* 双登录入口卡片 */
.login-entry{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px;max-width:760px}
.lentry{padding:26px;cursor:pointer;transition:.25s;position:relative;overflow:hidden}
.lentry:hover{transform:translateY(-4px);border-color:var(--brand)}
.lentry .ic{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
  background:linear-gradient(135deg,var(--brand2),var(--brand-deep));box-shadow:0 6px 20px rgba(2,132,199,.4)}
.lentry h3{font-size:18px;margin-bottom:6px}
.lentry p{color:var(--text-dim);font-size:13px;line-height:1.6}
.lentry .go{margin-top:14px;display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600}

/* 业务板块 */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.biz{padding:24px;transition:.25s}
.biz:hover{border-color:var(--brand);transform:translateY(-4px)}
.biz .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;
  background:rgba(69,126,255,.12);border:1px solid var(--line-strong)}
.biz h3{font-size:16px;margin-bottom:8px}
.biz p{color:var(--text-dim);font-size:13.5px;line-height:1.7}
.biz .cat{font-size:12px;color:var(--brand);margin-bottom:10px;display:block}

/* 产品卡 */
.prod{display:flex;gap:18px;align-items:flex-start;padding:24px}
.prod .pic{width:60px;height:60px;border-radius:14px;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(14,165,233,.25),rgba(2,132,199,.15));border:1px solid var(--line-strong)}
.prod h3{font-size:17px}
.prod .ver{margin-top:4px;font-size:13px;color:var(--brand)}
.prod .desc{color:var(--text-dim);font-size:13.5px;margin:8px 0 12px;line-height:1.7}
.prod .price{font-size:13px;color:var(--lac)}

/* 登录卡片 */
.auth{max-width:440px;margin:0 auto;padding:30px;margin-top:30px}
.auth .tabs{display:flex;gap:8px;margin-bottom:24px;background:#eef2fb;padding:5px;border-radius:12px;border:1px solid var(--line)}
.auth .tabs button{flex:1;padding:10px;border-radius:9px;background:none;color:var(--text-dim);font-size:14px;font-weight:600;transition:.2s}
.auth .tabs button.active{background:linear-gradient(135deg,var(--brand2),var(--brand-deep));color:#ffffff}
.auth .title{font-size:22px;font-weight:800;text-align:center;margin-bottom:6px}
.auth .sub{text-align:center;color:var(--text-dim);font-size:13px;margin-bottom:22px}
.auth .foot{text-align:center;margin-top:18px;font-size:13px;color:var(--text-dim)}
.link-btn{background:none;color:var(--brand);font-size:13px;padding:0;margin-left:4px}
.link-btn:hover{color:var(--lac)}

/* ===================== 管理后台布局 ===================== */
.shell{display:flex;min-height:100vh}
.sidebar{width:232px;flex:none;background:#0f1525;border-right:1px solid #2a3550;
  backdrop-filter:blur(12px);padding:18px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;overflow-y:auto;z-index:40}
.sidebar .logo{padding:6px 10px 16px;margin-bottom:6px;border-bottom:1px solid var(--line)}
.sidebar .logo .mark{width:34px;height:34px}
.menu-item{display:flex;align-items:center;gap:11px;padding:11px 13px;border-radius:10px;color:var(--text-dim);
  font-size:14px;cursor:pointer;transition:.18s;border:1px solid transparent}
.menu-item:hover{color:var(--text);background:rgba(69,126,255,.08)}
.menu-item.active{color:var(--text);background:linear-gradient(90deg,rgba(69,126,255,.18),rgba(14,165,233,.06));border-color:var(--line-strong)}
.menu-item .ico{width:20px;height:20px;flex:none;opacity:.9}
.menu-item .cnt{margin-left:auto;background:rgba(248,113,113,.16);color:var(--danger);border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}
.sidebar .sp{flex:1}
.sidebar .sb-user{padding:12px;border-top:1px solid var(--line);font-size:13px}
.sidebar .sb-user .n{font-weight:600;color:var(--text)}
.sidebar .sb-user .r{color:var(--text-faint);font-size:12px;margin-top:2px}
.main{flex:1;min-width:0;padding:0 24px 40px}
.main-top{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.main-top .t{font-size:20px;font-weight:800}
.main-top .clock{color:var(--text-dim);font-size:13px}

/* 视图切换 */
.view{display:none}
.view.active{display:block;animation:fadein .3s}

/* 提交卡 */
.sub-card{padding:20px;margin-bottom:16px}
.sub-card .top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.sub-card .tt{font-size:16px;font-weight:700}
.sub-card .meta{color:var(--text-faint);font-size:12.5px;margin:6px 0 10px;display:flex;gap:14px;flex-wrap:wrap}
.sub-card .body{color:var(--text-dim);font-size:14px;line-height:1.7;white-space:pre-wrap}
.sub-card .admin-note{margin-top:12px;padding:12px;border-radius:10px;background:rgba(69,126,255,.06);border:1px dashed var(--line-strong);font-size:13px;color:var(--lac)}
.sub-actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}

/* 用户行 */
.user-row{display:flex;align-items:center;gap:12px}
.user-row .av{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px;background:rgba(69,126,255,.15);color:var(--brand)}

/* ===================== 点歌播放器 ===================== */
.songbar{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:90;
  width:min(620px,calc(100vw - 28px));padding:12px 16px;display:flex;align-items:center;gap:14px}
.songbar .np{min-width:0;flex:1}
.songbar .np .tt{font-size:14px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.songbar .np .ar{font-size:12px;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.songbar .ctrls{display:flex;align-items:center;gap:6px}
.songbar button{background:rgba(69,126,255,.1);border:1px solid var(--line-strong);color:var(--text);
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;transition:.2s}
.songbar button:hover{background:rgba(69,126,255,.25)}
.songbar button.play{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--brand2),var(--brand-deep));border:none}
.songbar .prog{position:absolute;left:16px;right:16px;bottom:0;height:3px;background:rgba(69,126,255,.12);border-radius:3px;cursor:pointer;overflow:hidden}
.songbar .prog i{display:block;height:100%;width:0%;background:linear-gradient(90deg,var(--brand),var(--lac))}
.songbar .times{font-size:11px;color:var(--text-faint);min-width:88px;text-align:center}
.songbar .lyricline{position:absolute;top:-44px;left:0;right:0;text-align:center;font-size:13px;color:var(--lac);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transition:opacity .4s;text-shadow:0 0 12px rgba(103,232,249,.6)}
.songbar .lyricline.show{opacity:1}

/* ===================== 歌词页 / 歌曲列表 ===================== */
.song-item{display:flex;align-items:center;gap:14px;padding:14px;cursor:pointer}
.song-item:hover{background:rgba(69,126,255,.05)}
.song-item .no{width:28px;text-align:center;color:var(--text-faint);font-size:13px}
.song-item .no.playing{color:var(--lac);font-weight:800}
.song-item .info{flex:1;min-width:0}
.song-item .info .t{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.song-item .info .a{font-size:12px;color:var(--text-dim)}
.song-item .pc{font-size:12px;color:var(--text-faint)}

.lyrics-box{margin-top:18px;padding:16px;height:300px;overflow-y:auto;line-height:2.1;font-size:14px;color:var(--text-dim)}
.lyrics-box .ly{transition:.3s;cursor:pointer}
.lyrics-box .ly.on{color:var(--lac);font-weight:700;text-shadow:0 0 14px rgba(103,232,249,.6)}

/* ===================== 响应式 ===================== */
@media (max-width:980px){
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .biz-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .login-entry{grid-template-columns:1fr}
  .biz-grid{grid-template-columns:1fr}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .sidebar{position:fixed;left:-100%;transition:left .3s;width:250px;height:100vh;box-shadow:0 0 40px rgba(23,35,61,.25)}
  .sidebar.open{left:0}
  .nav-links{display:none}
  .burger{display:block}
  .main{padding:0 14px 40px}
  .page-head h2{font-size:20px}
  .modal{padding:18px}
}
@media (max-width:480px){
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:10px}
  .hstat .n{font-size:22px}
  .songbar{padding:10px 12px}
  .songbar button{width:30px;height:30px}
}