/* ============ AC奇迹反外挂 动态版 - 前台样式 ============ */
:root {
  --bg: #0d1117; --panel: #161b22; --panel2: #1c2128;
  --border: #30363d; --border2: #21262d;
  --text: #e6edf3; --muted: #8b949e; --dim: #6e7681;
  --blue: #58a6ff; --blue2: #1f6feb; --blue3: #388bfd; --green: #3fb950;
  --red: #f85149; --orange: #d29922; --purple: #bc8cff;
  --radius: 8px; --mono: Consolas, "Courier New", monospace;
  /* 主题化补充变量 */
  --topbar-bg: rgba(13, 17, 23, .9);
  --hero-glow: rgba(31, 111, 235, .12);
  --btn-text: #fff;
  --float-qq-bg: #1f6feb; --float-qq-hover: #388bfd; --float-qq-glow: rgba(31, 111, 235, .45);
  --blue-soft: rgba(88, 166, 255, .1); --blue-soft2: rgba(88, 166, 255, .3);
  --blue-soft3: rgba(88, 166, 255, .15); --blue-soft4: rgba(88, 166, 255, .07); --blue-soft5: rgba(88, 166, 255, .45);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif; font-size: 14px; line-height: 1.7; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
main { flex: 1; }

/* ---------- 顶栏 ---------- */
.topbar { border-bottom: 1px solid var(--border); background: var(--topbar-bg); position: sticky; top: 0; z-index: 100; }
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; color: var(--text); }
.logo svg { display: block; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { color: var(--muted); padding: 7px 12px; border-radius: 6px; font-size: 14px; }
.nav a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.nav a.active { color: var(--text); background: var(--panel); }
.nav .btn { background: var(--blue2); color: var(--btn-text); }
.nav .btn:hover { background: var(--blue3); color: var(--btn-text); }
.nav .sep { color: var(--dim); margin: 0 2px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); font-size: 18px; padding: 4px 12px; border-radius: 6px; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 64px 0 48px; border-bottom: 1px solid var(--border); background: radial-gradient(1200px 300px at 50% -80px, var(--hero-glow), transparent 70%); }
.hero h1 { font-size: 40px; font-weight: 800; letter-spacing: .5px; }
.hero .sub { color: var(--muted); margin: 14px auto 26px; max-width: 720px; font-size: 15px; }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 30px; }
.chip { border: 1px solid var(--border); background: var(--panel); color: var(--text); font-size: 13px; padding: 5px 14px; border-radius: 999px; }
.chip b { color: var(--blue); }
.hero-actions { display: flex; justify-content: center; gap: 14px; }
.btn-primary { background: var(--blue2); color: var(--btn-text); padding: 10px 26px; border-radius: 6px; font-size: 15px; font-weight: 600; display: inline-block; }
.btn-primary:hover { background: var(--blue3); color: var(--btn-text); text-decoration: none; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); padding: 10px 26px; border-radius: 6px; font-size: 15px; display: inline-block; }
.btn-ghost:hover { background: var(--panel); text-decoration: none; }
.btn-register { background: var(--green); color: var(--btn-text); padding: 10px 26px; border-radius: 6px; font-size: 15px; font-weight: 600; display: inline-block; }
.btn-register:hover { background: var(--blue3); color: var(--btn-text); text-decoration: none; }

/* ---------- 区块 ---------- */
.section { padding: 48px 0; }
.section-title { text-align: center; margin-bottom: 8px; font-size: 24px; font-weight: 700; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 34px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cards.cols4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { font-size: 16px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.card p { color: var(--muted); font-size: 13.5px; }
.card .tag { font-size: 12px; color: var(--blue); border: 1px solid var(--blue-soft2); background: var(--blue-soft); padding: 2px 8px; border-radius: 4px; }
.card .card-ico { width: 40px; height: 40px; border-radius: 10px; background: var(--blue-soft); border: 1px solid var(--blue-soft2); color: var(--blue); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.card .card-ico svg { width: 22px; height: 22px; }

/* ---------- 个人中心页签 ---------- */
.uc-tabs { display: flex; gap: 8px; border-bottom: 1px solid var(--border); margin: 22px 0 24px; overflow-x: auto; }
.uc-tab { background: none; border: none; color: var(--muted); font-size: 14px; padding: 10px 16px; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.uc-tab:hover { color: var(--text); }
.uc-tab.active { color: var(--blue); border-bottom-color: var(--blue); font-weight: 600; }
.uc-pane { display: none; }
.uc-pane.active { display: block; }
.uc-msg { background: rgba(63, 185, 80, .12); border: 1px solid rgba(63, 185, 80, .4); color: var(--green); font-size: 13.5px; padding: 10px 14px; border-radius: 6px; margin: 16px 0 0; }
.input { background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 9px 12px; font-size: 13.5px; }
.input:focus { outline: none; border-color: var(--blue); }
.entry-link { color: var(--blue); font-size: 13px; }

/* ---------- 统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 8px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); text-align: center; padding: 24px 10px; }
.stat .num { font-size: 30px; font-weight: 800; color: var(--blue); }
.stat .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.step { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.step .no { width: 34px; height: 34px; border-radius: 50%; background: var(--blue-soft3); color: var(--blue); display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 10px; }
.step h4 { font-size: 15px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 13px; }

/* ---------- 通用列表/表格 ---------- */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); }
.panel .p-head { padding: 14px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.panel .p-head h2 { font-size: 16px; }
.panel .p-body { padding: 20px; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.tbl th, table.tbl td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border2); }
table.tbl th { color: var(--muted); font-weight: 600; background: var(--panel2); white-space: nowrap; }
table.tbl tr:last-child td { border-bottom: none; }
.mono { font-family: var(--mono); font-size: 12.5px; }

/* ---------- 徽章 ---------- */
.badge { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 999px; border: 1px solid; white-space: nowrap; }
.b-on { color: var(--green); border-color: rgba(63, 185, 80, .45); background: rgba(63, 185, 80, .1); }
.b-off { color: var(--red); border-color: rgba(248, 81, 73, .45); background: rgba(248, 81, 73, .1); }
.b-warn { color: var(--orange); border-color: rgba(210, 153, 34, .45); background: rgba(210, 153, 34, .1); }
.b-info { color: var(--blue); border-color: rgba(88, 166, 255, .45); background: rgba(88, 166, 255, .1); }
.b-purple { color: var(--purple); border-color: rgba(188, 140, 255, .45); background: rgba(188, 140, 255, .1); }

/* ---------- 下载页 ---------- */
.dl-card { display: flex; gap: 18px; align-items: flex-start; padding: 22px; }
.dl-card + .dl-card { border-top: 1px solid var(--border); }
.dl-icon { width: 52px; height: 52px; flex-shrink: 0; border-radius: 10px; background: var(--blue-soft); border: 1px solid var(--blue-soft2); display: flex; align-items: center; justify-content: center; }
.dl-info { flex: 1; min-width: 0; }
.dl-info h3 { font-size: 17px; display: flex; align-items: center; gap: 10px; }
.dl-info .meta { color: var(--dim); font-size: 12.5px; margin: 4px 0 8px; font-family: var(--mono); }
.dl-info p { color: var(--muted); font-size: 13.5px; }
.dl-btn { flex-shrink: 0; }

/* ---------- 文章列表 ---------- */
.art-list { display: flex; flex-direction: column; gap: 14px; }
.art-item { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.art-item h3 { font-size: 16.5px; }
.art-item h3 a { color: var(--text); }
.art-item h3 a:hover { color: var(--blue); }
.art-item .meta { color: var(--dim); font-size: 12.5px; margin: 6px 0 8px; display: flex; gap: 14px; flex-wrap: wrap; }
.art-item .summary { color: var(--muted); font-size: 13.5px; }
.art-content { line-height: 1.9; font-size: 15px; word-break: break-word; }
.art-content h1, .art-content h2 { margin: 22px 0 10px; font-size: 20px; color: var(--text); border-bottom: 1px solid var(--border2); padding-bottom: 8px; }
.art-content h3 { margin: 20px 0 8px; font-size: 17.5px; color: var(--text); }
.art-content h4 { margin: 18px 0 8px; font-size: 16px; color: var(--text); }
.art-content h5, .art-content h6 { margin: 16px 0 8px; font-size: 15px; color: var(--text); }
.art-content p { margin: 10px 0; color: var(--text); }
.art-content ul, .art-content ol { margin: 10px 0 10px 22px; }
.art-content li { margin: 5px 0; }
.art-content img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border2); margin: 12px 0; display: block; }
.art-content a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.art-content strong { color: var(--text); }
.art-content blockquote { margin: 12px 0; padding: 10px 16px; border-left: 3px solid var(--blue2); background: var(--panel2); color: var(--muted); border-radius: 0 6px 6px 0; }
.art-content pre { background: var(--panel2); border: 1px solid var(--border2); border-radius: 6px; padding: 12px 14px; overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.7; margin: 12px 0; }
.art-content pre code { background: none; border: none; padding: 0; color: #e3b341; font-size: 13px; }
.art-content code { background: var(--panel2); border: 1px solid var(--border2); padding: 2px 6px; border-radius: 4px; font-family: var(--mono); font-size: 13px; color: #e3b341; }
.art-content table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 13.5px; }
.art-content th, .art-content td { border: 1px solid var(--border2); padding: 8px 12px; text-align: left; }
.art-content th { background: var(--panel2); }
.art-content hr { border: none; border-top: 1px solid var(--border2); margin: 18px 0; }
.art-nav { display: flex; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 13.5px; }

/* ---------- 时间轴 ---------- */
.timeline { display: block; }
.tl-node { display: grid; grid-template-columns: 150px 24px 1fr; gap: 0 18px; position: relative; padding-bottom: 34px; }
.tl-date { text-align: right; padding-top: 20px; color: var(--muted); font-family: var(--mono); font-size: 13px; }
.tl-axis { position: relative; }
.tl-dot { width: 13px; height: 13px; border-radius: 50%; background: var(--blue); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--blue); position: absolute; top: 24px; left: 50%; transform: translateX(-50%); }
.tl-line { position: absolute; top: 37px; bottom: 4px; left: 50%; transform: translateX(-50%); width: 2px; background: var(--border); }
.tl-node:last-child .tl-line { display: none; }
.tl-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; overflow: hidden; }
.tl-card h3 { font-size: 16px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.tl-body { margin-top: 10px; min-width: 0; }
.tl-body h3, .tl-body h4, .tl-body h5 { font-size: 14.5px; color: var(--text); margin: 14px 0 6px; }
.tl-body p { color: var(--muted); font-size: 13.5px; margin: 6px 0; }
.tl-body b { color: var(--text); font-weight: 600; }
.tl-body code { background: var(--panel2); border: 1px solid var(--border2); padding: 1px 5px; border-radius: 4px; font-family: var(--mono); font-size: 12.5px; color: #e3b341; }
.tl-body ul, .tl-body ol { margin: 6px 0 6px 22px; }
.tl-body li { margin: 4px 0; color: var(--muted); font-size: 13.5px; }
.tl-body table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 12.5px; }
.tl-body th, .tl-body td { border: 1px solid var(--border); padding: 6px 9px; color: var(--muted); text-align: left; vertical-align: top; }
.tl-body th { color: var(--text); background: var(--panel2); white-space: nowrap; }
.tl-body pre { background: var(--panel2); border: 1px solid var(--border2); border-radius: 6px; padding: 10px 12px; overflow-x: auto; margin: 8px 0; }
.tl-body pre code { background: none; border: none; padding: 0; color: #e3b341; font-size: 12.5px; }

/* ---------- 端口检测 ---------- */
.tool-box { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; max-width: 860px; margin: 0 auto; }
.tool-row { display: flex; gap: 12px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }
.tool-row label { color: var(--muted); font-size: 13.5px; min-width: 120px; }
.tool-row input[type=text] { flex: 1; min-width: 220px; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 9px 12px; border-radius: 6px; font-size: 14px; font-family: var(--mono); }
.port-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 18px; }
.port-chip { border: 1px solid var(--border); background: var(--bg); color: var(--text); padding: 5px 13px; border-radius: 6px; cursor: pointer; font-size: 13px; font-family: var(--mono); user-select: none; }
.port-chip:hover { border-color: var(--blue); }
.port-chip.on { background: var(--blue-soft3); border-color: var(--blue); color: var(--blue); }
.result-list { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.result-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.result-item .dot { width: 9px; height: 9px; border-radius: 50%; }
.result-item.ok .dot { background: var(--green); }
.result-item.fail .dot { background: var(--red); }
.result-item .port { font-family: var(--mono); color: var(--text); }
.result-item .state { color: var(--muted); font-size: 13px; }
.hint-box { background: var(--blue-soft4); border: 1px solid var(--blue-soft2); border-radius: var(--radius); padding: 14px 18px; font-size: 13px; color: var(--muted); margin: 16px 0; }

/* ---------- 表单（登录/注册） ---------- */
.auth-wrap { max-width: 420px; margin: 60px auto; }
.auth-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 34px; }
.auth-card h1 { font-size: 22px; margin-bottom: 6px; text-align: center; }
.auth-card .sub { color: var(--muted); text-align: center; font-size: 13px; margin-bottom: 24px; }
.f-group { margin-bottom: 16px; }
.f-group label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.f-group input { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 10px 12px; border-radius: 6px; font-size: 14px; }
.f-group input:focus { outline: none; border-color: var(--blue); }
.btn-block { width: 100%; background: var(--blue2); color: var(--btn-text); border: none; padding: 11px; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; margin-top: 6px; font-family: inherit; }
.btn-block:hover { background: var(--blue3); }
.msg-err { background: rgba(248, 81, 73, .1); border: 1px solid rgba(248, 81, 73, .45); color: var(--red); padding: 10px 14px; border-radius: 6px; font-size: 13px; margin-bottom: 16px; }
.msg-ok { background: rgba(63, 185, 80, .1); border: 1px solid rgba(63, 185, 80, .45); color: var(--green); padding: 10px 14px; border-radius: 6px; font-size: 13px; margin-bottom: 16px; }
.auth-foot { text-align: center; margin-top: 18px; color: var(--muted); font-size: 13px; }

/* ---------- 游戏注册页（左表单 + 右信息） ---------- */
.reg-layout { display: flex; gap: 28px; align-items: flex-start; margin: 40px auto; max-width: 980px; }
.reg-layout .reg-form { flex: 0 0 420px; }
.reg-layout .reg-form .auth-card { padding: 28px 30px; }
.reg-layout .reg-info { flex: 1; display: flex; flex-direction: column; gap: 18px; }
.reg-panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.reg-panel h3 { font-size: 15px; margin-bottom: 12px; color: var(--text); }
.reg-server-list, .reg-tips { list-style: none; margin: 0; padding: 0; }
.reg-server-list li { display: flex; justify-content: space-between; align-items: center; padding: 9px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; margin-bottom: 8px; font-size: 14px; }
.reg-server-list .rs-name { font-weight: 600; color: var(--text); }
.reg-server-list .rs-status { color: var(--green); font-size: 12px; }
.reg-tips li { position: relative; padding-left: 16px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.reg-tips li::before { content: "›"; position: absolute; left: 2px; color: var(--blue); }
.f-group select { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 10px 12px; border-radius: 6px; font-size: 14px; }
.f-group select:focus { outline: none; border-color: var(--blue); }
@media (max-width: 860px) {
  .reg-layout { flex-direction: column; max-width: 440px; }
  .reg-layout .reg-form { flex: none; width: 100%; }
}

/* ---------- 游戏排行榜 ---------- */
.rank-head { text-align: center; margin: 34px 0 20px; }
.rank-head h1 { font-size: 24px; }
.rank-sub { color: var(--muted); font-size: 13px; margin-top: 6px; }
.rank-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.rank-tbl { width: 100%; border-collapse: collapse; }
.rank-tbl th { background: var(--bg-soft, rgba(128,128,128,.06)); color: var(--muted); font-size: 13px; font-weight: 600; text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.rank-tbl td { padding: 11px 16px; border-bottom: 1px solid var(--border); font-size: 14px; }
.rank-tbl tr:last-child td { border-bottom: none; }
.rank-tbl .c-rank { width: 70px; }
.rank-tbl .c-lv { width: 90px; }
.rank-tbl .c-num { width: 100px; text-align: right; }
.rank-tbl td.c-num { color: var(--muted); }
.rank-medal { font-size: 18px; }
.rank-no { display: inline-block; min-width: 22px; text-align: center; color: var(--muted); font-family: var(--mono); }
.rank-name { font-weight: 600; color: var(--text); }
.rank-lv { color: var(--blue); font-weight: 700; font-family: var(--mono); }
.rank-cls { color: var(--muted); font-size: 13px; }
tr.rank-top td { background: rgba(255, 215, 0, .05); }
tr.rank-1 td:first-child, tr.rank-1 td:nth-child(2) { background: rgba(255, 215, 0, .12); }
tr.rank-2 td:first-child, tr.rank-2 td:nth-child(2) { background: rgba(192, 192, 192, .10); }
tr.rank-3 td:first-child, tr.rank-3 td:nth-child(2) { background: rgba(205, 127, 50, .10); }
.rank-foot { text-align: center; color: var(--muted); font-size: 12px; margin: 14px 0 30px; }
@media (max-width: 640px) {
  .rank-tbl th, .rank-tbl td { padding: 9px 10px; }
  .rank-tbl .c-num { width: auto; }
}

/* ---------- flash ---------- */
.flash { padding: 12px 18px; border-radius: 6px; margin: 18px 0; font-size: 13.5px; }
.flash.ok { background: rgba(63, 185, 80, .1); border: 1px solid rgba(63, 185, 80, .45); color: var(--green); }
.flash.err { background: rgba(248, 81, 73, .1); border: 1px solid rgba(248, 81, 73, .45); color: var(--red); }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.contact-card { text-align: center; }
.contact-card h3 { justify-content: center; }
.contact-val { font-size: 15px; font-weight: 600; margin-top: 6px; color: var(--text); }
.contact-val a:hover { text-decoration: underline; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--border); padding: 26px 0; margin-top: 48px; }
.foot-contact { display: flex; flex-wrap: wrap; gap: 10px 26px; color: var(--muted); font-size: 12.5px; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid var(--border2); }
.fc-item { display: inline-flex; align-items: center; gap: 6px; }
.fc-item svg { color: var(--dim); flex-shrink: 0; }
.foot-in { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; color: var(--dim); font-size: 12.5px; }

/* ---------- 漂浮QQ ---------- */
.float-qq { position: fixed; right: 22px; bottom: 26px; z-index: 999; width: 56px; height: 56px; border-radius: 50%; background: var(--float-qq-bg); display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 18px var(--float-qq-glow); transition: transform .18s ease; }
.float-qq:hover { transform: scale(1.08); background: var(--float-qq-hover); text-decoration: none; }
.float-qq .float-qq-text { position: absolute; right: 64px; top: 50%; transform: translateY(-50%); background: var(--panel); border: 1px solid var(--border); color: var(--text); font-size: 12.5px; padding: 6px 12px; border-radius: 6px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity .15s ease; }
.float-qq:hover .float-qq-text { opacity: 1; }

/* ---------- 404 ---------- */
.nf { text-align: center; padding: 90px 0; }
.nf h1 { font-size: 60px; color: var(--blue); }
.nf p { color: var(--muted); margin: 12px 0 26px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .cards, .cards.cols4, .stats, .steps, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; position: absolute; top: 56px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch; padding: 10px 16px; gap: 2px; }
  .nav.open { display: flex; }
  .nav a { padding: 10px 12px; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 30px; }
  .timeline, .tl-node { grid-template-columns: 110px 20px 1fr; }
}
@media (max-width: 560px) {
  .cards, .cards.cols4, .stats, .steps, .contact-grid { grid-template-columns: 1fr; }
  .dl-card { flex-direction: column; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 25px; }
}

/* ============ 前台风格主题（8 套，后台"网站设置"可切换） ============ */
/* 默认深色科技（theme-default）= :root 默认变量，无需覆盖 */

body.theme-darkblue {
  --bg: #0a0e1a; --panel: #10182b; --panel2: #16203a;
  --border: #1e2a4a; --border2: #182238;
  --text: #e8eefc; --muted: #8fa2c9; --dim: #6b7ba0;
  --blue: #4da3ff; --blue2: #2563eb; --blue3: #3b82f6;
  --green: #34d399; --red: #f87171; --orange: #fbbf24; --purple: #a78bfa;
  --topbar-bg: rgba(10, 14, 26, .92); --hero-glow: rgba(37, 99, 235, .18);
  --blue-soft: rgba(77, 163, 255, .1); --blue-soft2: rgba(77, 163, 255, .3);
  --blue-soft3: rgba(77, 163, 255, .15); --blue-soft4: rgba(77, 163, 255, .07); --blue-soft5: rgba(77, 163, 255, .45);
}

body.theme-light {
  --bg: #f6f8fb; --panel: #ffffff; --panel2: #f0f3f8;
  --border: #e1e7ef; --border2: #e9eef5;
  --text: #1f2937; --muted: #6b7280; --dim: #9ca3af;
  --blue: #2563eb; --blue2: #2563eb; --blue3: #1d4ed8;
  --green: #059669; --red: #dc2626; --orange: #d97706; --purple: #7c3aed;
  --topbar-bg: rgba(255, 255, 255, .95); --hero-glow: rgba(37, 99, 235, .08);
  --blue-soft: rgba(37, 99, 235, .08); --blue-soft2: rgba(37, 99, 235, .25);
  --blue-soft3: rgba(37, 99, 235, .12); --blue-soft4: rgba(37, 99, 235, .05); --blue-soft5: rgba(37, 99, 235, .35);
}

body.theme-red {
  --bg: #170a0d; --panel: #201014; --panel2: #2a151a;
  --border: #3d2226; --border2: #2c181b;
  --text: #f7e9ea; --muted: #c49a9f; --dim: #9a7378;
  --blue: #ff6b6b; --blue2: #dc2626; --blue3: #ef4444;
  --green: #34d399; --red: #f87171; --orange: #fbbf24; --purple: #f472b6;
  --topbar-bg: rgba(23, 10, 13, .92); --hero-glow: rgba(220, 38, 38, .15);
  --blue-soft: rgba(255, 107, 107, .1); --blue-soft2: rgba(255, 107, 107, .3);
  --blue-soft3: rgba(255, 107, 107, .15); --blue-soft4: rgba(255, 107, 107, .07); --blue-soft5: rgba(255, 107, 107, .45);
}

body.theme-gold {
  --bg: #141210; --panel: #1e1b16; --panel2: #272219;
  --border: #3d362a; --border2: #2e2920;
  --text: #f3ead8; --muted: #b8a98a; --dim: #8d8066;
  --blue: #e0b84e; --blue2: #c9a227; --blue3: #d4af37;
  --green: #7bc96f; --red: #e06c5f; --orange: #e0a03e; --purple: #c7a5e8;
  --btn-text: #1a1508;
  --topbar-bg: rgba(20, 18, 16, .92); --hero-glow: rgba(201, 162, 39, .14);
  --blue-soft: rgba(224, 184, 78, .1); --blue-soft2: rgba(224, 184, 78, .3);
  --blue-soft3: rgba(224, 184, 78, .15); --blue-soft4: rgba(224, 184, 78, .07); --blue-soft5: rgba(224, 184, 78, .45);
  --float-qq-bg: #c9a227; --float-qq-hover: #d4af37; --float-qq-glow: rgba(201, 162, 39, .45);
}

body.theme-green {
  --bg: #0b1512; --panel: #132019; --panel2: #1a2a22;
  --border: #27423a; --border2: #1e352e;
  --text: #e6f2ec; --muted: #8fb3a5; --dim: #6d9184;
  --blue: #3ddc97; --blue2: #10b981; --blue3: #34d399;
  --green: #3ddc97; --red: #f87171; --orange: #fbbf24; --purple: #a78bfa;
  --topbar-bg: rgba(11, 21, 18, .92); --hero-glow: rgba(16, 185, 129, .15);
  --blue-soft: rgba(61, 220, 151, .1); --blue-soft2: rgba(61, 220, 151, .3);
  --blue-soft3: rgba(61, 220, 151, .15); --blue-soft4: rgba(61, 220, 151, .07); --blue-soft5: rgba(61, 220, 151, .45);
}

body.theme-purple {
  --bg: #120a1e; --panel: #1b1130; --panel2: #241a3d;
  --border: #372b55; --border2: #2a2042;
  --text: #ede7f8; --muted: #a99ac9; --dim: #8577a5;
  --blue: #a78bfa; --blue2: #7c3aed; --blue3: #8b5cf6;
  --green: #34d399; --red: #f87171; --orange: #fbbf24; --purple: #c084fc;
  --topbar-bg: rgba(18, 10, 30, .92); --hero-glow: rgba(124, 58, 237, .18);
  --blue-soft: rgba(167, 139, 250, .1); --blue-soft2: rgba(167, 139, 250, .3);
  --blue-soft3: rgba(167, 139, 250, .15); --blue-soft4: rgba(167, 139, 250, .07); --blue-soft5: rgba(167, 139, 250, .45);
}

body.theme-gray {
  --bg: #101214; --panel: #17191c; --panel2: #1e2124;
  --border: #2c3136; --border2: #24282c;
  --text: #e6e8ea; --muted: #90969d; --dim: #6e747b;
  --blue: #8b95a5; --blue2: #5b6472; --blue3: #6e7889;
  --green: #7fa87f; --red: #c96a62; --orange: #b88a4a; --purple: #8d87a8;
  --topbar-bg: rgba(16, 18, 20, .92); --hero-glow: rgba(91, 100, 114, .12);
  --blue-soft: rgba(139, 149, 165, .1); --blue-soft2: rgba(139, 149, 165, .3);
  --blue-soft3: rgba(139, 149, 165, .15); --blue-soft4: rgba(139, 149, 165, .07); --blue-soft5: rgba(139, 149, 165, .45);
}

/* ============ 奇迹游戏主题（theme-mu）：暗黑奇幻 · 暗金/血红/魔法 ============ */
body.theme-mu {
  --bg: #0b0705; --panel: #17100b; --panel2: #201610;
  --border: #4a3523; --border2: #332518;
  --text: #f0e6d2; --muted: #b09a78; --dim: #7d6a50;
  --blue: #e8b64c; --blue2: #c9972f; --blue3: #e0a83c;
  --green: #7fbf7a; --red: #e05545; --orange: #e8a23c; --purple: #c98fe0;
  --btn-text: #191005;
  --topbar-bg: rgba(11, 7, 5, .94); --hero-glow: rgba(232, 182, 76, .14);
  --blue-soft: rgba(232, 182, 76, .1); --blue-soft2: rgba(232, 182, 76, .32);
  --blue-soft3: rgba(232, 182, 76, .16); --blue-soft4: rgba(232, 182, 76, .07); --blue-soft5: rgba(232, 182, 76, .5);
  --float-qq-bg: #c9972f; --float-qq-hover: #e0a83c; --float-qq-glow: rgba(232, 182, 76, .5);
  --radius: 10px;
}

/* 奇迹主题：整页暗黑纹理 + 顶部暗金辉光 */
body.theme-mu {
  background-image:
    radial-gradient(1000px 420px at 50% -120px, rgba(232, 182, 76, .10), transparent 70%),
    radial-gradient(1400px 600px at 50% 120%, rgba(120, 30, 20, .08), transparent 70%),
    linear-gradient(rgba(232, 182, 76, .018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 182, 76, .018) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
}
body.theme-mu .container { position: relative; }

/* 顶栏：暗金描边 + 底部微光 */
body.theme-mu .topbar { border-bottom: 1px solid #5a4125; box-shadow: 0 1px 18px rgba(232, 182, 76, .08); }
body.theme-mu .logo { color: #f5e7c8; text-shadow: 0 0 14px rgba(232, 182, 76, .35); }
body.theme-mu .logo svg rect { fill: #c9972f; }
body.theme-mu .logo svg path { stroke: #191005; }
body.theme-mu .nav a.active { color: #f5e7c8; background: rgba(232, 182, 76, .14); border: 1px solid rgba(232, 182, 76, .3); }
body.theme-mu .nav a:hover { background: rgba(232, 182, 76, .08); }
body.theme-mu .nav .btn { background: linear-gradient(135deg, #d4a43a, #b9832a); border: 1px solid rgba(232, 182, 76, .45); box-shadow: 0 2px 12px rgba(185, 131, 42, .35); }
body.theme-mu .nav .btn:hover { background: linear-gradient(135deg, #e0b04a, #c99330); }
body.theme-mu .nav-toggle { border-color: #5a4125; }

/* Hero：金火魔法阵光效 */
body.theme-mu .hero { border-bottom: 1px solid #4a3523; background: radial-gradient(900px 260px at 50% -60px, rgba(232, 182, 76, .18), transparent 70%), radial-gradient(560px 200px at 50% 30px, rgba(200, 60, 30, .12), transparent 75%); }
body.theme-mu .hero h1 {
  background: linear-gradient(180deg, #ffe9ae 0%, #e8b64c 55%, #b9832a 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent;
  text-shadow: 0 0 30px rgba(232, 182, 76, .25);
}
body.theme-mu .hero .sub { color: #c4ab82; }
body.theme-mu .chip { border-color: #5a4125; background: rgba(23, 16, 11, .85); color: #e6d5ae; }
body.theme-mu .chip b { color: #e8b64c; }
body.theme-mu .btn-primary, body.theme-mu .btn-block {
  background: linear-gradient(135deg, #d4a43a, #b9832a);
  border: 1px solid rgba(232, 182, 76, .5);
  box-shadow: 0 3px 16px rgba(185, 131, 42, .35), inset 0 1px 0 rgba(255, 233, 174, .35);
  text-shadow: 0 1px 2px rgba(0, 0, 0, .35);
}
body.theme-mu .btn-primary:hover, body.theme-mu .btn-block:hover { background: linear-gradient(135deg, #e0b04a, #c99330); }
body.theme-mu .btn-register { background: linear-gradient(135deg, #c9502f, #9c3320); border: 1px solid rgba(224, 85, 69, .5); box-shadow: 0 3px 16px rgba(156, 51, 32, .35); }
body.theme-mu .btn-register:hover { background: linear-gradient(135deg, #d9603c, #ad3a25); }
body.theme-mu .btn-ghost { border-color: #5a4125; color: #e6d5ae; }
body.theme-mu .btn-ghost:hover { background: rgba(232, 182, 76, .08); }

/* 卡片/面板：暗金边框 + hover 金辉 */
body.theme-mu .card, body.theme-mu .stat, body.theme-mu .step, body.theme-mu .panel, body.theme-mu .art-item, body.theme-mu .tl-card, body.theme-mu .auth-card, body.theme-mu .tool-box {
  background: linear-gradient(180deg, rgba(32, 22, 16, .9), rgba(23, 16, 11, .96));
  border-color: #4a3523;
  box-shadow: 0 2px 14px rgba(0, 0, 0, .35);
}
body.theme-mu .card { border-top: 1px solid rgba(232, 182, 76, .35); }
body.theme-mu .card:hover { border-color: #6b4d2a; box-shadow: 0 4px 22px rgba(232, 182, 76, .12), inset 0 0 24px rgba(232, 182, 76, .03); transform: translateY(-2px); transition: all .2s ease; }
body.theme-mu .card h3 { color: #f5e7c8; }
body.theme-mu .card .card-ico { background: rgba(232, 182, 76, .12); border-color: rgba(232, 182, 76, .4); color: #e8b64c; box-shadow: 0 0 16px rgba(232, 182, 76, .15); }
body.theme-mu .section-title { color: #f5e7c8; text-shadow: 0 0 18px rgba(232, 182, 76, .2); }
body.theme-mu .section-sub { color: #a8906c; }

/* 统计：金色发光数字 */
body.theme-mu .stat .num { color: #e8b64c; text-shadow: 0 0 20px rgba(232, 182, 76, .4); }
body.theme-mu .step .no { background: rgba(232, 182, 76, .16); color: #e8b64c; border: 1px solid rgba(232, 182, 76, .4); box-shadow: 0 0 12px rgba(232, 182, 76, .2); }

/* 时间轴：金点金线 */
body.theme-mu .tl-dot { background: #e8b64c; border-color: #0b0705; box-shadow: 0 0 0 1px #e8b64c, 0 0 12px rgba(232, 182, 76, .5); }
body.theme-mu .tl-line { background: #4a3523; }
body.theme-mu .tl-card h3 { color: #f5e7c8; }

/* 表格/徽章/输入 */
body.theme-mu table.tbl th { background: rgba(232, 182, 76, .06); color: #c4ab82; }
body.theme-mu .input, body.theme-mu .f-group input, body.theme-mu .tool-row input[type=text] { background: #0e0a07; border-color: #4a3523; }
body.theme-mu .input:focus, body.theme-mu .f-group input:focus, body.theme-mu .tool-row input[type=text]:focus { border-color: #e8b64c; box-shadow: 0 0 0 3px rgba(232, 182, 76, .12); }
body.theme-mu .port-chip:hover { border-color: #e8b64c; }
body.theme-mu .port-chip.on { background: rgba(232, 182, 76, .16); border-color: #e8b64c; color: #e8b64c; }
body.theme-mu .hint-box { background: rgba(232, 182, 76, .06); border-color: rgba(232, 182, 76, .3); color: #a8906c; }
body.theme-mu .uc-tab.active { color: #e8b64c; border-bottom-color: #e8b64c; }
body.theme-mu .entry-link { color: #e8b64c; }
body.theme-mu .art-item h3 a:hover { color: #e8b64c; }
body.theme-mu .art-content blockquote { border-left-color: #c9972f; background: rgba(232, 182, 76, .06); }
body.theme-mu .art-content h1, body.theme-mu .art-content h2 { border-bottom-color: #332518; }

/* 页脚 / 漂浮QQ */
body.theme-mu footer { border-top: 1px solid #4a3523; background: rgba(11, 7, 5, .7); }
body.theme-mu .foot-contact { border-bottom-color: #332518; }
body.theme-mu .float-qq { background: linear-gradient(135deg, #d4a43a, #b9832a); border: 1px solid rgba(232, 182, 76, .5); }
body.theme-mu .float-qq:hover { background: linear-gradient(135deg, #e0b04a, #c99330); }

/* 404 */
body.theme-mu .nf h1 { color: #e8b64c; text-shadow: 0 0 24px rgba(232, 182, 76, .4); }

/* 移动端导航背景跟随主题 */
@media (max-width: 900px) {
  body.theme-mu .nav { background: #17100b; border-bottom-color: #4a3523; }
}

/* ============ 福袋飘落（后台"网站设置→福袋飘落"开关控制） ============ */
.bag-layer {
  position: fixed; inset: 0; z-index: 9999;
  pointer-events: none; overflow: hidden;
}
.bag-layer .bag-item {
  position: absolute; top: -80px;
  will-change: transform, opacity;
  animation: bag-fall linear forwards;
  opacity: 0;
}
.bag-layer .bag-item svg {
  display: block;
  filter: drop-shadow(0 4px 12px rgba(180, 90, 0, .4));
}
@keyframes bag-fall {
  0%   { transform: translateY(-10vh) rotate(0deg) translateX(0); opacity: 0; }
  8%   { opacity: 1; }
  50%  { transform: translateY(45vh) rotate(180deg) translateX(var(--sway, 30px)); opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: translateY(108vh) rotate(360deg) translateX(calc(var(--sway, 30px) * -1)); opacity: 0; }
}
/* 尊重系统"减少动态效果"设置：关闭动画 */
@media (prefers-reduced-motion: reduce) {
  .bag-layer { display: none !important; }
}

/* ============ 奇迹介绍（首页装备/物品图鉴） ============ */
#mu-intro .mu-groups { display: flex; gap: 10px; flex-wrap: wrap; margin: 8px 0 14px; }
#mu-intro .mu-group-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 22px; font-size: 14.5px; font-weight: 600;
  color: var(--muted); background: var(--panel);
  border: 1px solid var(--border); border-radius: 999px; cursor: pointer;
  transition: all .18s ease;
}
#mu-intro .mu-group-btn:hover { color: var(--text); border-color: var(--blue3); }
#mu-intro .mu-group-btn.active { color: var(--btn-text); background: linear-gradient(135deg, var(--blue2), var(--blue3)); border-color: transparent; box-shadow: 0 3px 14px var(--blue-soft2); }
#mu-intro .mu-group-btn .mu-count { font-size: 11.5px; background: var(--blue-soft); padding: 1px 8px; border-radius: 999px; }
#mu-intro .mu-group-btn.active .mu-count { background: rgba(0,0,0,.18); }

#mu-intro .mu-cats { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
#mu-intro .mu-cat-chip {
  padding: 5px 14px; font-size: 12.8px; color: var(--muted);
  background: transparent; border: 1px solid var(--border2); border-radius: 6px; cursor: pointer;
  transition: all .15s ease;
}
#mu-intro .mu-cat-chip:hover { color: var(--text); border-color: var(--blue3); }
#mu-intro .mu-cat-chip.active { color: var(--blue); background: var(--blue-soft4); border-color: var(--blue3); }

#mu-intro .mu-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
  gap: 12px; transition: opacity .2s ease;
}
#mu-intro .mu-item {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 12px 8px; text-align: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  transition: all .18s ease; overflow: hidden;
}
#mu-intro .mu-item:hover { border-color: var(--blue3); box-shadow: 0 4px 18px var(--blue-soft2); transform: translateY(-2px); }
#mu-intro .mu-thumb {
  width: 84px; height: 84px; display: flex; align-items: center; justify-content: center;
  background: var(--bg); border-radius: 8px; overflow: hidden;
}
#mu-intro .mu-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
#mu-intro .mu-name { font-size: 12.5px; color: var(--text); line-height: 1.35; word-break: break-all; }
#mu-intro .mu-empty { grid-column: 1 / -1; color: var(--muted); padding: 40px 0; text-align: center; }
@media (max-width: 600px) {
  #mu-intro .mu-grid { grid-template-columns: repeat(3, 1fr); }
}