:root{
  --primary:#6366f1;
  --primary-dark:#4f46e5;
  --accent:#8b5cf6;
  --grad:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);
  --bg:#f3f4f8;
  --card:#ffffff;
  --text:#1f2333;
  --muted:#8a90a6;
  --border:#e7e9f2;
  --danger:#ef4444;
  --success:#10b981;
  --radius:14px;
  --shadow:0 4px 20px rgba(99,102,241,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}

/* ===== 顶部导航 ===== */
.navbar{background:var(--grad);color:#fff;padding:0 20px;box-shadow:0 2px 12px rgba(99,102,241,.25);position:sticky;top:0;z-index:100}
.nav-inner{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:18px;height:60px}
.nav-logo{display:flex;align-items:center;gap:8px;color:#fff;font-size:20px;font-weight:800;letter-spacing:.5px}
.nav-logo .logo-ic{width:34px;height:34px;background:rgba(255,255,255,.18);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px}
.nav-links{display:flex;gap:6px;margin-left:8px}
.nav-links a{color:rgba(255,255,255,.9);padding:7px 14px;border-radius:8px;font-size:14px;font-weight:500;transition:.15s}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.18);color:#fff}
.nav-search{flex:1;max-width:320px;margin-left:auto;display:flex}
.nav-search input{width:100%;border:none;border-radius:8px 0 0 8px;padding:8px 14px;font-size:14px;outline:none;background:rgba(255,255,255,.95)}
.nav-search button{border:none;background:#fff;border-radius:0 8px 8px 0;padding:0 14px;cursor:pointer;color:var(--primary);font-size:15px}
.nav-user{display:flex;align-items:center;gap:10px;margin-left:6px}
.nav-user .u-name{color:#fff;font-size:14px;font-weight:600}
.nav-user .u-badge{background:rgba(255,255,255,.2);border-radius:20px;padding:4px 12px;font-size:13px}
.nav-user a.btn{background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.35);color:#fff;padding:6px 14px;border-radius:8px;font-size:13px;font-weight:600}
.nav-user a.btn:hover{background:rgba(255,255,255,.3)}
.nav-user a.btn-solid{background:#fff;color:var(--primary);border:none;padding:7px 16px;border-radius:8px;font-size:13px;font-weight:700}
.nav-user a.btn-solid:hover{background:#f0f0ff}

/* ===== 主体 ===== */
.main{flex:1;max-width:1080px;margin:0 auto;padding:24px 16px 48px;width:100%}
.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.page-title{font-size:22px;font-weight:800}
.page-sub{color:var(--muted);font-size:13px;margin-top:2px}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--grad);color:#fff;border:none;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;box-shadow:0 3px 12px rgba(99,102,241,.25)}
.btn:hover{opacity:.92;color:#fff;transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary);box-shadow:none}
.btn-outline:hover{background:rgba(99,102,241,.06);color:var(--primary-dark)}
.btn-danger{background:var(--danger);box-shadow:0 3px 12px rgba(239,68,68,.2)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-block{width:100%;justify-content:center}
.btn:disabled{opacity:.6;cursor:not-allowed}

/* ===== 卡片 ===== */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);margin-bottom:16px;overflow:hidden}
.card-head{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-weight:700;font-size:15px}
.card-body{padding:18px}

/* ===== 板块网格 ===== */
.board-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin-bottom:22px}
.board-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:.15s;display:block;color:var(--text)}
.board-card:hover{transform:translateY(-3px);box-shadow:0 8px 26px rgba(99,102,241,.14);color:var(--text)}
.board-ic{width:44px;height:44px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;margin-bottom:12px}
.board-name{font-size:16px;font-weight:700;margin-bottom:3px}
.board-desc{font-size:13px;color:var(--muted);margin-bottom:10px}
.board-stats{font-size:12px;color:var(--muted);display:flex;gap:14px}
.board-stats b{color:var(--text)}

/* ===== 帖子列表 ===== */
.post-item{display:flex;gap:14px;padding:16px 18px;border-bottom:1px solid var(--border);align-items:flex-start}
.post-item:last-child{border-bottom:none}
.post-item:hover{background:#fafaff}
.post-ava{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}
.post-main{flex:1;min-width:0}
.post-title{font-size:15px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.post-title a{color:var(--text)}
.post-title a:hover{color:var(--primary)}
.tag{font-size:11px;padding:2px 8px;border-radius:20px;font-weight:600;white-space:nowrap}
.tag-pin{background:#fef3c7;color:#b45309}
.tag-hot{background:#fee2e2;color:#dc2626}
.tag-lock{background:#e5e7eb;color:#6b7280}
.post-desc{font-size:13px;color:var(--muted);margin-top:4px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.post-meta{font-size:12px;color:var(--muted);margin-top:6px;display:flex;gap:14px;flex-wrap:wrap}
.post-meta b{color:var(--text);font-weight:600}
.post-count{text-align:right;flex-shrink:0;min-width:64px}
.post-count .n{font-size:16px;font-weight:800;color:var(--primary)}
.post-count .l{font-size:11px;color:var(--muted)}
.post-last{font-size:11px;color:var(--muted);text-align:right;margin-top:4px}

/* ===== 帖子详情 ===== */
.topic{display:flex;gap:16px;padding:22px}
.topic .post-ava{width:52px;height:52px;font-size:20px}
.topic-body{flex:1;min-width:0}
.topic-title{font-size:20px;font-weight:800;margin-bottom:4px}
.topic-meta{font-size:13px;color:var(--muted);margin-bottom:14px;display:flex;gap:14px;flex-wrap:wrap}
.topic-content{font-size:15px;line-height:1.9;word-break:break-word;color:#2a2e42}
.topic-content img{max-width:100%;border-radius:8px}
.topic-content pre{background:#1e2240;color:#e6e9ff;padding:14px;border-radius:10px;overflow-x:auto;font-size:13px}
.topic-content code{background:#eff0fb;padding:2px 6px;border-radius:5px;font-size:13px}
.topic-actions{display:flex;gap:10px;margin-top:16px}

/* ===== 回复 ===== */
.reply-item{display:flex;gap:14px;padding:16px 18px;border-bottom:1px solid var(--border)}
.reply-item .post-ava{width:40px;height:40px;font-size:15px}
.reply-body{flex:1;min-width:0}
.reply-meta{font-size:13px;color:var(--muted);margin-bottom:6px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.reply-meta b{color:var(--text)}
.reply-content{font-size:14px;line-height:1.8;color:#2a2e42;word-break:break-word}
.reply-floor{color:var(--muted);font-size:12px;margin-left:auto}

/* ===== 表单 ===== */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#3a3f58}
.form-control{width:100%;border:1.5px solid var(--border);border-radius:10px;padding:10px 14px;font-size:14px;outline:none;transition:.15s;background:#fff;font-family:inherit}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
textarea.form-control{min-height:120px;resize:vertical;line-height:1.7}
select.form-control{appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238a90a6' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 12px center;background-size:16px;padding-right:38px}
.form-hint{font-size:12px;color:var(--muted);margin-top:5px}
.form-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:14px}
.form-ok{background:#ecfdf5;border:1px solid #a7f3d0;color:#047857;padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:14px}

/* ===== 登录注册 ===== */
.auth-wrap{max-width:420px;margin:40px auto}
.auth-card{background:var(--card);border-radius:18px;box-shadow:0 10px 40px rgba(99,102,241,.12);border:1px solid var(--border);overflow:hidden}
.auth-head{background:var(--grad);padding:28px 24px;text-align:center;color:#fff}
.auth-head h2{font-size:22px;font-weight:800}
.auth-head p{font-size:13px;opacity:.85;margin-top:4px}
.auth-body{padding:24px}
.auth-alt{text-align:center;font-size:13px;color:var(--muted);margin-top:16px}
.auth-alt a{font-weight:600}

/* ===== 个人中心 ===== */
.profile-head{display:flex;gap:18px;align-items:center;padding:24px}
.profile-head .post-ava{width:64px;height:64px;font-size:24px}
.profile-name{font-size:20px;font-weight:800}
.profile-role{font-size:12px;padding:3px 10px;border-radius:20px;font-weight:600;display:inline-block;margin-top:4px}
.role-admin{background:#ede9fe;color:#6d28d9}
.role-user{background:#eef2f7;color:#64748b}
.profile-meta{font-size:13px;color:var(--muted);margin-top:6px}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;padding:0 24px 24px}
.stat-box{background:#f8f9fd;border:1px solid var(--border);border-radius:12px;padding:14px;text-align:center}
.stat-box .v{font-size:22px;font-weight:800;color:var(--primary)}
.stat-box .k{font-size:12px;color:var(--muted);margin-top:2px}

/* ===== 分页 ===== */
.pagination{display:flex;justify-content:center;gap:6px;margin:20px 0}
.pagination a,.pagination span{min-width:38px;height:38px;display:flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--border);background:#fff;font-size:14px;font-weight:600;color:var(--text);padding:0 10px}
.pagination a:hover{border-color:var(--primary);color:var(--primary)}
.pagination .cur{background:var(--grad);color:#fff;border-color:transparent}
.pagination .disabled{opacity:.5;pointer-events:none}

/* ===== 空状态 ===== */
.empty{text-align:center;padding:50px 20px;color:var(--muted)}
.empty .e-ic{font-size:44px;margin-bottom:12px}
.empty p{font-size:14px}

/* ===== 公告 ===== */
.notice-bar{background:linear-gradient(135deg,#fef3c7,#fde68a);border:1px solid #fcd34d;color:#92400e;padding:12px 18px;border-radius:12px;margin-bottom:18px;font-size:14px;display:flex;gap:10px;align-items:center}
.notice-bar b{flex-shrink:0}

/* ===== 表格(后台) ===== */
.table-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{background:#f8f9fd;text-align:left;padding:11px 14px;font-size:13px;color:var(--muted);border-bottom:1px solid var(--border);white-space:nowrap}
.tbl td{padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
.tbl tr:hover td{background:#fafaff}
.tbl .mini{font-size:12px;color:var(--muted)}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge-ok{background:#ecfdf5;color:#047857}
.badge-no{background:#fef2f2;color:#b91c1c}
.badge-warn{background:#fffbeb;color:#b45309}

/* ===== 页脚 ===== */
.footer{background:#fff;border-top:1px solid var(--border);padding:18px;text-align:center;font-size:13px;color:var(--muted)}

/* ===== 响应式 ===== */
@media(max-width:768px){
  .nav-inner{flex-wrap:wrap;height:auto;padding:8px 0;gap:8px}
  .nav-logo{order:1;flex-shrink:0}
  .nav-user{order:2;margin-left:auto;flex-shrink:0}
  .nav-links{order:3;flex-basis:100%;margin-left:0;display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:4px;padding:2px 0;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{white-space:nowrap;padding:7px 12px}
  .nav-search{order:4;flex-basis:100%;max-width:100%;margin-left:0}
  .nav-search input{font-size:16px}
  .board-grid{grid-template-columns:1fr 1fr}
  .topic{flex-direction:column}
  .post-count{display:none}
  .page-head{flex-direction:column;align-items:flex-start}
  .notice-bar{flex-wrap:wrap}
  .auth-wrap{margin:24px auto}
  .profile-head{padding:18px}
  .stat-row{padding:0 18px 18px}
  .reward-qr{width:min(300px,70vw);height:min(300px,70vw)}
  .reward-body{padding:20px;gap:20px}
  .like-btn{min-height:44px;padding:10px 20px}
  .btn{min-height:44px}
  .btn-sm{min-height:38px}
  .form-control{padding:12px 14px;font-size:16px}
  .topic{padding:18px}
  .reply-item{padding:14px 16px}
  .post-item{padding:14px 16px}
  .card-head{padding:12px 16px}
  .pagination{flex-wrap:wrap}
  .modal{max-width:calc(100vw - 32px)}
  .back-top{right:16px;bottom:calc(20px + env(safe-area-inset-bottom,0px))}
  .footer{padding-bottom:calc(18px + env(safe-area-inset-bottom,0px))}
  .checkin-streak{font-size:38px}
}
@media(max-width:480px){
  .board-grid{grid-template-columns:1fr}
  .nav-links a{padding:7px 10px;font-size:13px}
  .main{padding:16px 12px 40px}
  .page-title{font-size:19px}
  .topic-title{font-size:18px}
  .topic{padding:16px}
  .topic .post-ava{width:44px;height:44px;font-size:17px}
  .post-ava{width:38px;height:38px;font-size:15px}
  .profile-head{flex-direction:column;text-align:center;gap:12px}
  .profile-head .post-ava{width:56px;height:56px;font-size:22px}
  .reward-hero{padding:28px 18px}
  .reward-qr{width:min(280px,78vw);height:min(280px,78vw)}
  .checkin-stat{min-width:calc(50% - 8px);padding:12px}
  .checkin-stats{gap:8px}
  .like-bar{display:flex}
  .like-btn{flex:1;justify-content:center}
  .vcode-row{flex-direction:column}
  .btn-captcha{width:100%;justify-content:center}
  .auth-body{padding:20px 18px}
  .auth-head{padding:22px 18px}
  .form-hint{font-size:11.5px}
  .footer{font-size:12px}
  .back-top{right:12px;bottom:calc(14px + env(safe-area-inset-bottom,0px));width:42px;height:42px}
  .notice-bar{padding:10px 14px;font-size:13px}
  .board-card{padding:14px}
  .board-ic{width:40px;height:40px;font-size:18px}
}

/* ===== 注册·邮箱验证码 ===== */
.req{color:#dc2626}
.vcode-row{display:flex;gap:8px;align-items:stretch}
.vcode-row .vcode-input{flex:1}
.btn-captcha{white-space:nowrap;padding:10px 16px}
.btn-captcha:disabled{background:#eef2ff;color:#6366f1;opacity:.85;cursor:wait;box-shadow:none}
#code-tip{transition:color .2s}

/* ===== 人机验证弹窗 ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(3px);z-index:999;display:flex;align-items:center;justify-content:center;padding:16px}
.modal{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(15,23,42,.35);width:100%;max-width:340px;overflow:hidden;animation:modal-in .18s ease}
@keyframes modal-in{from{transform:scale(.92);opacity:0}to{transform:scale(1);opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff}
.modal-head h3{margin:0;font-size:16px}
.modal-close{background:none;border:none;color:#fff;font-size:22px;line-height:1;cursor:pointer;padding:2px 6px;border-radius:6px}
.modal-close:hover{background:rgba(255,255,255,.2)}
.modal-body{padding:18px}
.modal-tip{font-size:13px;color:var(--muted);margin:0 0 12px}
.captcha-box{display:flex;align-items:center;gap:10px;margin-bottom:12px}
#captcha-img{border:1px solid var(--border);border-radius:10px;cursor:pointer;background:#eef2ff}
.captcha-refresh{font-size:12px;color:var(--primary);cursor:pointer;white-space:nowrap}
.captcha-refresh:hover{text-decoration:underline}
.captcha-input{text-align:center;font-size:18px;letter-spacing:6px;font-weight:700;margin-bottom:12px}
.form-ok{background:#ecfdf5;border:1px solid #a7f3d0;color:#047857;padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:14px}

/* ===== 赞赏 ===== */
.reward-card{max-width:640px;margin:0 auto}
.reward-hero{background:var(--grad);color:#fff;text-align:center;padding:36px 24px}
.reward-hero .reward-ic{font-size:46px;margin-bottom:10px}
.reward-hero h2{font-size:22px;font-weight:800;margin:0 0 8px}
.reward-hero p{font-size:14px;opacity:.92;margin:0}
.reward-body{display:flex;gap:28px;padding:28px;flex-wrap:wrap;justify-content:center;align-items:flex-start}
.reward-qr-wrap{text-align:center}
.reward-qr{width:300px;height:300px;border-radius:16px;border:1px solid var(--border);box-shadow:0 10px 30px rgba(99,102,241,.16);object-fit:contain;background:#fff}
.reward-qr-tip{font-size:13px;color:var(--muted);margin-top:12px}
.reward-note{flex:1;min-width:220px;max-width:340px}
.reward-note-title{font-size:15px;font-weight:700;margin-bottom:10px}
.reward-note ul{padding-left:18px;color:var(--muted);font-size:13px;line-height:2}
.reward-thanks{color:var(--primary);font-weight:600;margin-top:14px;font-size:14px}

/* ===== 点赞 ===== */
.like-bar{margin-top:14px}
.like-btn{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1.5px solid var(--border);color:var(--text);padding:8px 18px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;text-decoration:none}
.like-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);text-decoration:none}
.like-btn.liked{background:linear-gradient(135deg,#fff1f2,#ffe4e6);border-color:#fb7185;color:#e11d48}
.like-btn .like-n{font-weight:800}

/* ===== 签到卡片 ===== */
.checkin-card{max-width:560px;margin:0 auto;text-align:center}
.checkin-streak{font-size:44px;font-weight:800;color:var(--primary)}
.checkin-label{color:var(--muted);font-size:13px;margin-top:4px}
.checkin-stats{display:flex;gap:12px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.checkin-stat{background:#f8f9fd;border:1px solid var(--border);border-radius:12px;padding:14px 22px;text-align:center;min-width:120px}
.checkin-stat .v{font-size:18px;font-weight:800;color:var(--primary)}
.checkin-stat .k{font-size:12px;color:var(--muted);margin-top:2px}
.checkin-btn{font-size:16px;padding:13px 34px}
.checkin-btn:disabled{background:#e5e7eb;color:#9ca3af;box-shadow:none;cursor:not-allowed}

/* ===== 页脚链接/回到顶部 ===== */
.footer-links{margin-top:8px;font-size:12.5px}
.footer-links a{color:var(--muted);margin:0 2px}
.footer-links a:hover{color:var(--primary)}
.back-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;font-size:20px;font-weight:800;border:none;cursor:pointer;box-shadow:0 8px 22px rgba(99,102,241,.35);opacity:0;visibility:hidden;transition:.2s;z-index:200}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-2px)}
@media(max-width:480px){.back-top{right:14px;bottom:18px;width:42px;height:42px}}

/* ===== 移动端增强(2026-08-27) ===== */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
img,video,iframe,canvas,svg{max-width:100%;height:auto}
*{-webkit-tap-highlight-color:transparent}
.topic-content img,.reply-content img{max-width:100%!important;height:auto!important}
.tbl td,.tbl th{white-space:nowrap}
@media(max-width:480px){
  .tbl td,.tbl th{padding:9px 10px;font-size:13px}
  .topic-content{font-size:15px}
  .topic-content pre{font-size:12.5px}
  .post-meta{gap:8px 12px;font-size:11.5px}
  .reply-meta{gap:8px 10px}
  .stat-box .v{font-size:19px}
  .board-stats{gap:10px;font-size:11.5px}
  .empty{padding:36px 16px}
  .reward-qr-tip{font-size:12px}
  .reward-note-title{font-size:14px}
  .checkin-label{font-size:12px}
  .auth-alt{font-size:12.5px}
}