/* ===== 林 枫 轨 交 · 共享样式 ===== */
:root{
  --navy:#0b1b3a;--navy-2:#12264f;
  --blue:#2563eb;--cyan:#38bdf8;--green:#10b981;--orange:#f59e0b;--red:#ef4444;
  --bg:#eef2f9;--card:#fff;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.75;font-size:15.5px;
}
img{max-width:100%;display:block;}
.mono{font-family:ui-monospace,"SF Mono",Consolas,monospace;}

/* ===== 导航 ===== */
.site-nav{position:sticky;top:0;z-index:100;background:rgba(11,27,58,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(56,189,248,.22);}
.nav-in{max-width:1160px;margin:0 auto;padding:0 20px;height:62px;display:flex;align-items:center;justify-content:space-between;gap:14px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;}
.brand .logo{width:34px;height:34px;border-radius:7px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;flex-shrink:0;box-shadow:0 0 0 2px rgba(56,189,248,.35),0 4px 14px rgba(37,99,235,.4);}
.brand .logo svg{width:20px;height:20px;}
.brand b{font-size:16.5px;letter-spacing:2px;}
.brand small{display:block;font-size:9.5px;color:#7dd3fc;letter-spacing:2px;font-weight:400;}
.nav-links{display:flex;gap:2px;align-items:center;}
.nav-links a{color:#cbd5e1;text-decoration:none;font-size:14px;padding:8px 12px;border-radius:8px;transition:.18s;white-space:nowrap;}
.nav-links a:hover{color:#fff;background:rgba(56,189,248,.14);}
.nav-links a.on{color:#fff;background:rgba(56,189,248,.2);}
.nav-links a.cta{margin-left:6px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-weight:600;padding:9px 15px;box-shadow:0 4px 14px rgba(37,99,235,.35);}
.nav-links a.cta:hover{transform:translateY(-1px);}
.nav-links a.auth{border:1px solid rgba(56,189,248,.4);color:#7dd3fc;font-weight:500;}
.nav-links a.auth:hover{background:rgba(56,189,248,.12);}
.nav-links .user-chip{display:inline-flex;align-items:center;gap:6px;color:#a7f3d0;font-size:13.5px;padding:0 10px;white-space:nowrap;}
.nav-links .user-chip b{color:#6ee7b7;font-weight:700;}
.menu-btn{display:none;background:none;border:none;color:#fff;cursor:pointer;min-width:44px;min-height:44px;place-items:center;padding:0;}
.menu-btn svg{width:26px;height:26px;}
.mobile-menu{display:none;background:rgba(11,27,58,.98);border-top:1px solid rgba(56,189,248,.15);}
.mobile-menu a{display:block;color:#cbd5e1;text-decoration:none;padding:14px 24px;font-size:15px;border-bottom:1px solid rgba(255,255,255,.05);}
.mobile-menu a.cta{color:#fff;font-weight:600;}

/* ===== 布局 ===== */
.wrap{max-width:1160px;margin:0 auto;padding:0 22px;}
section{padding:60px 0;}
.sec-head{margin-bottom:34px;}
.sec-head .kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12.5px;font-weight:700;letter-spacing:3px;margin-bottom:10px;}
.sec-head .kicker::before{content:'';width:22px;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:2px;}
.sec-head h2{font-size:clamp(24px,4vw,33px);font-weight:800;letter-spacing:.5px;line-height:1.3;}
.sec-head p{color:var(--muted);margin-top:9px;max-width:720px;}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:none;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:600;font-size:15px;padding:12px 24px;border-radius:10px;transition:.18s;cursor:pointer;border:none;}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 6px 20px rgba(37,99,235,.4);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(37,99,235,.5);}
.btn-ghost{background:rgba(255,255,255,.1);color:#e2e8f0;border:1px solid rgba(255,255,255,.22);}
.btn-ghost:hover{background:rgba(255,255,255,.18);}
.btn svg{width:16px;height:16px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--navy);color:#94a3b8;padding:34px 0;margin-top:30px;}
.foot-in{max-width:1160px;margin:0 auto;padding:0 22px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;}
.foot-in .brand b{color:#fff;}
.foot-in p{font-size:13px;}
.foot-in .warn{color:#7dd3fc;}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;border:none;cursor:pointer;box-shadow:0 8px 24px rgba(37,99,235,.4);opacity:0;visibility:hidden;transition:.3s;z-index:90;}
.to-top.show{opacity:1;visibility:visible;}
.to-top svg{width:20px;height:20px;}

/* ===== 页面头图（各页顶部小横幅） ===== */
.page-hero{position:relative;overflow:hidden;background:var(--navy);color:#fff;padding:64px 0 58px;}
.page-hero .ph-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3;}
.page-hero .ph-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,27,58,.9),rgba(11,27,58,.55));}
.page-hero .inner{position:relative;z-index:2;}
.page-hero .crumb{font-size:13px;color:#7dd3fc;letter-spacing:2px;margin-bottom:8px;}
.page-hero h1{font-size:clamp(26px,4.4vw,40px);font-weight:800;letter-spacing:1px;}
.page-hero p{color:#cbd5e1;margin-top:10px;max-width:680px;font-size:15px;}

/* ===== 卡片通用 ===== */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:26px;transition:.22s;position:relative;overflow:hidden;}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:0;transition:.25s;}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(37,99,235,.12);}
.card:hover::before{opacity:1;}
.card .ic{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;margin-bottom:15px;}
.card .ic svg{width:24px;height:24px;}
.card h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.card p{color:var(--muted);font-size:14px;}
.card .tag{display:inline-block;margin-top:13px;font-size:12px;color:var(--green);background:rgba(16,185,129,.1);padding:3px 11px;border-radius:20px;font-weight:600;}

/* ===== 时间轴 ===== */
.timeline{margin-top:8px;}
.tl-row{display:grid;grid-template-columns:54px 1fr;gap:16px;}
.tl-node{display:flex;flex-direction:column;align-items:center;}
.tl-dot{width:30px;height:30px;border-radius:50%;flex-shrink:0;background:var(--navy);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700;border:3px solid var(--cyan);position:relative;z-index:2;}
.tl-row:nth-child(1) .tl-dot{background:var(--blue);border-color:#bfdbfe;}
.tl-row:nth-child(2) .tl-dot{background:var(--green);border-color:#a7f3d0;}
.tl-row:nth-child(3) .tl-dot{background:var(--orange);border-color:#fde68a;}
.tl-row:nth-child(4) .tl-dot{background:var(--red);border-color:#fecaca;}
.tl-line{width:2px;flex:1;background:linear-gradient(180deg,var(--cyan),#bae6fd);}
.tl-body{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:18px 20px;margin-bottom:16px;transition:.22s;}
.tl-body:hover{box-shadow:0 12px 28px rgba(37,99,235,.1);}
.tl-body h3{font-size:16.5px;font-weight:700;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.tl-body h3 .badge{font-size:11px;font-weight:600;padding:2px 9px;border-radius:20px;}
.tl-body p{color:var(--muted);font-size:14px;margin-top:5px;}
.tl-body .arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;font-size:14px;text-decoration:none;margin-top:11px;}
.tl-body .arrow-link:hover{gap:10px;}

/* ===== 场景画廊 ===== */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.g-item{position:relative;border-radius:14px;overflow:hidden;cursor:pointer;background:var(--navy);transition:.25s;border:1px solid var(--line);}
.g-item img{width:100%;height:210px;object-fit:cover;transition:transform .5s ease;opacity:.93;}
.g-item:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(37,99,235,.2);}
.g-item:hover img{transform:scale(1.06);opacity:1;}
.g-cap{position:absolute;left:0;right:0;bottom:0;padding:30px 14px 11px;background:linear-gradient(180deg,transparent,rgba(11,27,58,.85));color:#fff;}
.g-cap b{font-size:14.5px;}
.g-cap span{font-size:11.5px;color:#a5b4fc;display:block;}
.g-tag{position:absolute;top:11px;left:11px;background:rgba(11,27,58,.72);color:#7dd3fc;font-size:10.5px;font-weight:700;letter-spacing:1px;padding:4px 10px;border-radius:20px;}
.g-zoom{position:absolute;top:11px;right:11px;width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.85);color:var(--navy);display:grid;place-items:center;opacity:0;transition:.22s;}
.g-item:hover .g-zoom{opacity:1;}
.g-zoom svg{width:14px;height:14px;}
.g-item.wide{grid-column:1/-1;}
.g-item.wide img{height:min(56vw,470px);}

/* ===== 灯箱 ===== */
.lightbox{position:fixed;inset:0;background:rgba(5,12,28,.95);z-index:200;display:none;align-items:center;justify-content:center;flex-direction:column;padding:28px;}
.lightbox.open{display:flex;}
.lightbox img{max-width:min(1100px,92vw);max-height:74vh;border-radius:11px;box-shadow:0 30px 80px rgba(0,0,0,.6);}
.lightbox .lcap{color:#e2e8f0;margin-top:16px;font-size:15px;font-weight:600;text-align:center;}
.lightbox .lcap span{color:#94a3b8;font-size:13px;display:block;margin-top:3px;}
.lightbox .close{position:absolute;top:18px;right:24px;background:none;border:none;color:#fff;font-size:34px;cursor:pointer;line-height:1;opacity:.8;}
.lightbox .close:hover{opacity:1;}
.lightbox .nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.1);border:none;color:#fff;width:50px;height:50px;border-radius:50%;cursor:pointer;font-size:24px;display:grid;place-items:center;transition:.18s;}
.lightbox .nav:hover{background:rgba(56,189,248,.3);}
.lightbox .prev{left:24px;}.lightbox .next{right:24px;}
.lb-count{position:absolute;bottom:24px;color:#94a3b8;font-size:13px;letter-spacing:2px;}

/* ===== 教程 ===== */
.step-panel{background:var(--card);border:1px solid var(--line);border-radius:16px;margin-bottom:22px;overflow:hidden;}
.step-head{display:flex;align-items:center;gap:14px;padding:18px 22px;cursor:pointer;transition:.18s;user-select:none;}
.step-head:hover{background:#f8fafc;}
.step-num{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px;flex-shrink:0;}
.step-head h3{font-size:17px;font-weight:700;flex:1;}
.step-head .meta{font-size:12px;color:var(--muted);}
.step-arrow{margin-left:auto;color:var(--muted);transition:transform .3s;width:18px;height:18px;flex-shrink:0;}
.step-panel.open .step-arrow{transform:rotate(90deg);}
.step-body{display:none;padding:4px 22px 24px;border-top:1px dashed var(--line);}
.step-panel.open .step-body{display:block;}
.step-body h4{font-size:15px;font-weight:700;margin:16px 0 7px;color:var(--navy);}
.step-body p{color:#475569;font-size:14px;margin-bottom:8px;}
.step-body ol,.step-body ul{margin:8px 0 8px 22px;color:#475569;font-size:14px;line-height:1.9;}
.step-body li{margin-bottom:6px;}
.step-body strong{color:var(--ink);}
.note{border-left:4px solid var(--orange);background:#fffbeb;padding:12px 16px;border-radius:0 10px 10px 0;margin:13px 0;font-size:14px;color:#78350f;}
.note.red{border-color:var(--red);background:#fef2f2;color:#7f1d1d;}
.groupbox{background:#f8fafc;border:1px solid var(--line);border-radius:11px;padding:16px;margin:13px 0;}
.groupbox .gnum{font-size:22px;font-weight:800;color:var(--blue);letter-spacing:1px;}
.qbtn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;text-decoration:none;padding:10px 18px;border-radius:9px;font-weight:600;font-size:14px;margin:8px 8px 0 0;cursor:pointer;border:none;}
.qbtn:hover{transform:translateY(-1px);}
.copy-btn{background:#eef2ff;color:var(--blue);border:1px solid #c7d2fe;}

/* ===== 配置 ===== */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.spec-card{background:var(--card);border:1px solid var(--line);border-radius:15px;overflow:hidden;}
.spec-card .head{padding:17px 22px;display:flex;align-items:center;justify-content:space-between;}
.spec-card.min .head{background:linear-gradient(135deg,#fffbeb,#fef3c7);}
.spec-card.rec .head{background:linear-gradient(135deg,#ecfdf5,#d1fae5);}
.spec-card .head h3{font-size:17px;font-weight:700;}
.spec-card .head span{font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:20px;}
.spec-card.min .head span{color:#b45309;background:rgba(245,158,11,.18);}
.spec-card.rec .head span{color:#047857;background:rgba(16,185,129,.18);}
.spec-table{width:100%;border-collapse:collapse;table-layout:fixed;}
.spec-table th,.spec-table td{padding:12px 16px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line);}
.spec-table th{width:24%;color:var(--muted);font-weight:500;}
.spec-table tr:last-child td{border-bottom:none;}
.spec-card.min .val{color:#92400e;font-weight:600;}
.spec-card.rec .val{color:#065f46;font-weight:600;}
.checklist{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:24px;margin-top:24px;}
.checklist h3{font-size:17px;font-weight:700;margin-bottom:5px;}
.checklist .sub{color:var(--muted);font-size:13px;margin-bottom:15px;}
.check-row{display:flex;align-items:flex-start;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);}
.check-row:last-child{border-bottom:none;}
.check-row label{display:flex;align-items:flex-start;gap:12px;cursor:pointer;flex:1;font-size:14px;color:#334155;min-height:24px;}
.check-row input[type=checkbox]{width:19px;height:19px;margin-top:2px;accent-color:var(--blue);cursor:pointer;flex-shrink:0;}
.result{border-radius:11px;padding:16px;margin-top:16px;text-align:center;font-weight:700;font-size:15.5px;display:none;}
.result.ok{background:#ecfdf5;color:#047857;display:block;}
.result.warn{background:#fffbeb;color:#b45309;display:block;}
.result.bad{background:#fef2f2;color:#b91c1c;display:block;}
.build{background:linear-gradient(135deg,#2e1065,#1e1b4b);color:#e9d5ff;border-radius:18px;padding:30px;margin-top:28px;}
.build .btitle{font-size:19px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:4px;}
.build .bsub{color:#a78bfa;font-size:13px;margin-bottom:20px;}
.parts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.part{background:rgba(255,255,255,.05);border:1px solid rgba(192,132,252,.3);border-radius:11px;padding:13px 15px;}
.part .k{font-size:12px;color:#a78bfa;display:flex;align-items:center;gap:7px;}
.part .v{font-weight:600;font-size:13.5px;color:#f3e8ff;margin-top:3px;}
.build .warn{margin-top:17px;font-size:13px;color:#fca5a5;background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.3);padding:10px 14px;border-radius:9px;}

/* ===== FAQ ===== */
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:13px;margin-bottom:13px;overflow:hidden;}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:17px 22px;font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;display:flex;align-items:center;gap:12px;}
.faq-q .qn{color:var(--blue);font-weight:700;flex-shrink:0;}
.faq-q .farrow{margin-left:auto;transition:.3s;flex-shrink:0;}
.faq-item.open .farrow{transform:rotate(45deg);}
.faq-a{display:none;padding:0 22px 19px;color:#475569;font-size:14px;line-height:1.9;border-top:1px dashed var(--line);padding-top:15px;}
.faq-item.open .faq-a{display:block;}

/* ===== 关于 ===== */
.about-card{background:var(--card);border:1px solid var(--line);border-radius:17px;padding:28px;display:flex;gap:22px;align-items:center;flex-wrap:wrap;}
.avatar{width:74px;height:74px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;color:#fff;font-size:28px;font-weight:800;flex-shrink:0;box-shadow:0 0 0 3px rgba(56,189,248,.3);}
.about-info{flex:1;min-width:200px;}
.about-info h3{font-size:20px;font-weight:800;}
.about-info .qq{color:var(--muted);font-size:14px;margin-top:4px;}
.bubble{background:#f1f5f9;padding:12px 16px;border-radius:12px;font-size:14px;color:#64748b;max-width:500px;position:relative;}
.bubble::before{content:'';position:absolute;left:-8px;top:50%;transform:translateY(-50%);border:8px solid transparent;border-right-color:#f1f5f9;border-left:0;}

/* ===== 登录 / 注册 ===== */
.auth-wrap{max-width:440px;margin:0 auto;padding:50px 22px 70px;}
.auth-card{background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 20px 50px rgba(11,27,58,.12);}
.auth-tabs{display:flex;border-bottom:1px solid var(--line);}
.auth-tab{flex:1;text-align:center;padding:15px;background:none;border:none;font-size:15px;font-weight:700;color:var(--muted);cursor:pointer;transition:.18s;position:relative;}
.auth-tab.on{color:var(--blue);}
.auth-tab.on::after{content:'';position:absolute;left:0;right:0;bottom:-1px;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:2px;}
.auth-body{padding:26px 26px 30px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600;}
.field input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font-size:15px;color:var(--ink);background:#fafcff;transition:.18s;}
.field input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.auth-submit{width:100%;padding:12px;border:none;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-size:15px;font-weight:700;cursor:pointer;margin-top:6px;transition:.18s;}
.auth-submit:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(37,99,235,.35);}
.auth-msg{margin-top:14px;font-size:13.5px;text-align:center;min-height:20px;}
.auth-msg.ok{color:var(--green);}
.auth-msg.err{color:var(--red);}
.auth-tip{margin-top:20px;font-size:13px;color:var(--muted);line-height:1.8;background:#f8fafc;border:1px dashed var(--line);padding:12px 15px;border-radius:9px;}

/* ===== 响应式 ===== */
@media(max-width:860px){
  .nav-links{display:none;}
  .menu-btn{display:grid;}
  .mobile-menu.open{display:block;}
  .cards3,.gallery,.spec-grid{grid-template-columns:1fr;}
  .parts{grid-template-columns:repeat(2,1fr);}
  .g-item.wide{grid-column:auto;}
  .g-item.wide img{height:210px;}
  section{padding:46px 0;}
  .about-card{flex-direction:column;text-align:center;}
  .bubble::before{display:none;}
  .lightbox .nav{width:42px;height:42px;font-size:20px;}
  .lightbox .prev{left:8px;}.lightbox .next{right:8px;}
}

/* ===== 论坛系统 ===== */
.mini-avatar{width:20px;height:20px;border-radius:50%;display:inline-grid;place-items:center;color:#fff;font-size:11px;font-weight:700;flex-shrink:0;}
.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:17px;font-weight:800;flex-shrink:0;box-shadow:0 0 0 2px rgba(56,189,248,.25);}
.avatar.lg{width:54px;height:54px;font-size:21px;}
.avatar.sm{width:26px;height:26px;font-size:11px;}

.f-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px;}
.f-stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:13px;padding:14px 16px;text-align:center;}
.f-stat b{display:block;font-size:22px;font-weight:800;color:#fff;}
.f-stat span{font-size:12px;color:#94a3b8;letter-spacing:1px;}

.forum-wrap{display:grid;grid-template-columns:292px 1fr;gap:22px;padding:40px 0 64px;align-items:start;}
.f-card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:18px;margin-bottom:18px;}
.f-card h4{font-size:13px;color:var(--muted);font-weight:700;letter-spacing:2px;margin-bottom:13px;display:flex;align-items:center;gap:8px;}
.f-card h4::before{content:'';width:16px;height:3px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));}
.f-search{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;color:var(--ink);background:#fafcff;transition:.18s;}
.f-search:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.f-cat-list{display:flex;flex-direction:column;gap:4px;}
.f-cat-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:10px;text-decoration:none;color:var(--ink);transition:.18s;border:1px solid transparent;}
.f-cat-item:hover{background:#f1f5f9;}
.f-cat-item.on{background:#eff6ff;border-color:#bfdbfe;}
.f-cat-item .ci{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex-shrink:0;}
.f-cat-item .ci svg{width:17px;height:17px;}
.f-cat-item b{font-size:14.5px;font-weight:700;display:block;line-height:1.25;}
.f-cat-item small{font-size:11.5px;color:var(--muted);display:block;}
.f-cat-item .cnt{margin-left:auto;font-size:11.5px;font-weight:700;color:var(--muted);background:#f1f5f9;padding:2px 9px;border-radius:20px;}
.f-cat-item.on .cnt{color:var(--blue);background:#dbeafe;}
.f-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;border:none;cursor:pointer;border-radius:11px;padding:12px 16px;font-size:15px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 6px 18px rgba(37,99,235,.35);transition:.18s;}
.f-btn:hover{transform:translateY(-2px);box-shadow:0 9px 24px rgba(37,99,235,.45);}
.f-btn svg{width:17px;height:17px;}
.f-user-mini{display:flex;align-items:center;gap:11px;padding:12px;background:#f8fafc;border:1px dashed var(--line);border-radius:12px;margin-bottom:16px;}
.f-user-mini b{font-size:14.5px;color:var(--ink);}
.f-user-mini small{font-size:11.5px;color:var(--muted);display:block;margin-top:1px;}
.f-user-mini .f-mini-btn{margin-left:auto;font-size:12px;color:var(--blue);text-decoration:none;font-weight:600;white-space:nowrap;}
.f-data-tools{display:flex;gap:8px;flex-wrap:wrap;}
.f-data-tools button{flex:1;min-width:120px;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:12.5px;color:#475569;cursor:pointer;transition:.15s;}
.f-data-tools button:hover{border-color:var(--blue);color:var(--blue);}
.f-sync{display:flex;gap:8px;align-items:flex-start;font-size:12.5px;color:var(--muted);line-height:1.65;padding:10px 12px;background:#f8fafc;border:1px dashed var(--line);border-radius:10px;}
.f-sync .dot{width:8px;height:8px;border-radius:50%;background:#94a3b8;flex-shrink:0;margin-top:5px;}
.f-sync.ok{color:#047857;background:#ecfdf5;border-color:#a7f3d0;}
.f-sync.ok .dot{background:var(--green);}

.f-main{min-width:0;}
.f-toolbar{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:13px 18px;margin-bottom:16px;flex-wrap:wrap;}
.f-toolbar .tt{font-size:15px;font-weight:700;color:var(--ink);}
.f-toolbar .tt small{font-size:12px;color:var(--muted);font-weight:500;margin-left:6px;}
.f-toolbar select{margin-left:auto;padding:8px 12px;border:1px solid var(--line);border-radius:9px;font-size:13.5px;color:var(--ink);background:#fafcff;cursor:pointer;}
.f-toolbar .f-order-label{font-size:12.5px;color:var(--muted);}

.thread-list{display:flex;flex-direction:column;gap:12px;}
.thread-row{display:grid;grid-template-columns:auto 1fr auto;gap:15px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:17px 20px;text-decoration:none;color:inherit;transition:.2s;position:relative;overflow:hidden;}
.thread-row::before{content:'';position:absolute;top:0;left:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--blue),var(--cyan));opacity:0;transition:.2s;}
.thread-row:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(37,99,235,.13);border-color:#bfdbfe;}
.thread-row:hover::before{opacity:1;}
.t-body{min-width:0;}
.t-title{font-size:16px;font-weight:700;color:var(--ink);line-height:1.45;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.thread-row:hover .t-title{color:var(--blue);}
.t-badge{font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:20px;letter-spacing:.5px;flex-shrink:0;}
.t-badge.pin{color:#b91c1c;background:rgba(239,68,68,.12);}
.t-badge.hot{color:#b45309;background:rgba(245,158,11,.15);}
.t-excerpt{font-size:13.5px;color:var(--muted);margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;}
.t-meta{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:12.5px;margin-top:9px;flex-wrap:wrap;}
.t-meta .who{color:#475569;font-weight:600;}
.t-meta .cat-pill{font-size:11px;font-weight:600;padding:1px 9px;border-radius:20px;flex-shrink:0;}
.t-stat{text-align:right;flex-shrink:0;}
.t-stat b{display:block;font-size:17px;font-weight:800;color:var(--blue);line-height:1.1;}
.t-stat span{font-size:11px;color:var(--muted);}
.t-stat .last{font-size:11.5px;color:var(--muted);margin-top:6px;}

/* 帖子详情 */
.tv-card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:24px 26px;margin-bottom:16px;}
.tv-back{display:inline-flex;align-items:center;gap:6px;color:var(--blue);text-decoration:none;font-size:13.5px;font-weight:600;margin-bottom:14px;}
.tv-back:hover{gap:10px;}
.tv-head h1{font-size:clamp(20px,3vw,26px);font-weight:800;line-height:1.4;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tv-head .tv-cat{font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:20px;}
.tv-post-head{display:flex;align-items:center;gap:13px;margin:18px 0 6px;padding-bottom:15px;border-bottom:1px dashed var(--line);}
.tv-post-head .who{font-weight:700;font-size:15px;}
.tv-post-head .who small{font-weight:400;color:var(--muted);font-size:12px;margin-left:7px;}
.tv-post-head .role{font-size:10.5px;color:var(--blue);background:rgba(37,99,235,.1);padding:1px 8px;border-radius:20px;font-weight:600;}
.tv-content{white-space:pre-wrap;line-height:1.9;font-size:15px;color:#334155;padding:4px 2px 8px;}
.tv-view{color:var(--muted);font-size:12.5px;margin-top:10px;}
.tv-replies{margin-top:20px;}
.tv-replies h3{font-size:15px;font-weight:700;margin-bottom:14px;}
.tv-reply{display:flex;gap:13px;padding:16px 4px;border-top:1px dashed var(--line);}
.tv-reply .r-main{min-width:0;flex:1;}
.tv-reply .r-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.tv-reply .r-name{font-weight:700;font-size:14px;}
.tv-reply .r-time{font-size:12px;color:var(--muted);}
.tv-reply .r-del{margin-left:auto;font-size:12px;color:var(--muted);text-decoration:none;}
.tv-reply .r-del:hover{color:var(--red);}
.tv-reply .r-body{font-size:14.5px;color:#334155;line-height:1.85;margin-top:6px;white-space:pre-wrap;}
.tv-del{display:inline-block;font-size:12.5px;color:var(--muted);text-decoration:none;margin-top:8px;}
.tv-del:hover{color:var(--red);}
.reply-box{margin-top:20px;background:#f8fafc;border:1px dashed var(--line);border-radius:12px;padding:16px;}
.reply-box textarea{width:100%;min-height:96px;padding:12px 13px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;color:var(--ink);background:#fff;resize:vertical;transition:.18s;}
.reply-box textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.reply-box .rb-row{display:flex;align-items:center;gap:10px;margin-top:10px;flex-wrap:wrap;}
.reply-box .rb-hint{font-size:12.5px;color:var(--muted);}
.reply-box .rb-btn{margin-left:auto;}

/* 弹窗 */
.f-modal{position:fixed;inset:0;background:rgba(5,12,28,.66);z-index:300;display:none;align-items:center;justify-content:center;padding:20px;}
.f-modal.open{display:flex;}
.f-modal-card{background:var(--card);border-radius:18px;width:min(640px,100%);max-height:88vh;overflow:auto;padding:26px 28px;box-shadow:0 30px 80px rgba(0,0,0,.35);}
.f-modal-card h3{font-size:19px;font-weight:800;margin-bottom:18px;display:flex;align-items:center;gap:9px;}
.f-modal-card .f-close{margin-left:auto;background:none;border:none;font-size:26px;color:var(--muted);cursor:pointer;line-height:1;}
.f-modal-card .f-close:hover{color:var(--ink);}
.f-field{margin-bottom:15px;}
.f-field label{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:6px;}
.f-field input,.f-field select,.f-field textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;color:var(--ink);background:#fafcff;transition:.18s;font-family:inherit;}
.f-field input:focus,.f-field select:focus,.f-field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.f-field textarea{min-height:160px;resize:vertical;line-height:1.8;}
.f-modal-btns{display:flex;gap:10px;margin-top:8px;}
.f-modal-btns .f-btn{width:auto;padding:11px 22px;}
.f-modal-btns .f-cancel{flex:0;background:#f1f5f9;color:#475569;box-shadow:none;}
.f-modal-btns .f-cancel:hover{background:#e2e8f0;transform:none;}
.f-msg{font-size:13px;min-height:18px;margin-top:6px;}
.f-msg.err{color:var(--red);}.f-msg.ok{color:var(--green);}

/* Toast */
.f-toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);background:var(--navy);color:#fff;padding:12px 22px;border-radius:12px;font-size:14px;box-shadow:0 12px 34px rgba(11,27,58,.4);opacity:0;visibility:hidden;transition:.3s;z-index:400;max-width:88vw;text-align:center;}
.f-toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}

/* 空状态 */
.f-empty{background:var(--card);border:1px dashed var(--line);border-radius:14px;padding:44px 20px;text-align:center;color:var(--muted);}
.f-empty b{display:block;font-size:16px;color:var(--ink);margin-bottom:6px;}

/* 首页论坛预览 */
.teaser-list{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;}
.teaser-row{display:flex;align-items:center;gap:14px;padding:16px 22px;border-bottom:1px dashed var(--line);text-decoration:none;color:inherit;transition:.18s;}
.teaser-row:last-child{border-bottom:none;}
.teaser-row:hover{background:#f8fafc;}
.teaser-row .t-title{font-size:15px;}
.teaser-row .t-title b{font-weight:600;}
.teaser-row .t-title small{font-weight:400;color:var(--muted);font-size:12px;margin-left:8px;}
.teaser-row .t-stat{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);white-space:nowrap;}
.teaser-cta{display:flex;align-items:center;justify-content:center;gap:22px;margin-top:22px;flex-wrap:wrap;}
.teaser-cta .f-btn{width:auto;padding:12px 26px;}
.teaser-note{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;}

@media(max-width:860px){
  .f-stats{grid-template-columns:repeat(2,1fr);}
  .forum-wrap{grid-template-columns:1fr;}
  .thread-row{grid-template-columns:auto 1fr;gap:12px;}
  .t-stat{display:none;}
  .tv-card{padding:18px 16px;}
  .f-toolbar select{margin-left:0;}
  .teaser-row{flex-wrap:wrap;}
  .teaser-row .t-stat{margin-left:0;}
  .field input,.f-search,.f-field input,.f-field select,.f-field textarea,.reply-box textarea{font-size:16px;}
}