/* ============================================================
   纸飞机 · telegramios.com.cn ——「航空航线」设计语言
   与前 18 站(SaaS 营销 landing:渐变 hero + bento + 卡片网格)彻底不同:
   深海军蓝航站楼 hero + 航班时刻表招牌 + 航线图 + 飞行日志 + 值机柜台登机牌 + 飞行须知
   观感:衬线大标题(宋体感)+ 等宽数字 + 纸感底 + 信号橙,像一张飞行须知 / 航站手册
   ============================================================ */

:root {
  --paper: #f7f6f1;         /* 纸感底 */
  --paper-2: #efede4;       /* 深一档纸 */
  --panel: #ffffff;
  --ink: #1a2332;           /* 深海军蓝 */
  --ink-2: #33405a;
  --muted: #5c6474;
  --navy: #14213d;          /* 航站楼深蓝 */
  --navy-2: #1d2d50;
  --navy-3: #28395e;
  --signal: #f5a623;        /* 信号橙 */
  --signal-2: #ff8c42;
  --blue: #3a6ea5;          /* 航图蓝 */
  --line: #d8d4c6;
  --line-2: #bfb9a8;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --r: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans); background: var(--paper); color: var(--ink);
  line-height: 1.75; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.3; }

.wrap { width: min(1080px, 92%); margin: 0 auto; }
.sec { padding: 84px 0; }
.center { text-align: center; padding: 96px 0; }

/* 区块标题 */
.sec-head { max-width: 640px; margin: 0 auto 46px; text-align: center; }
.sec-head h2 { font-size: 36px; font-weight: 700; letter-spacing: -.5px; }
.sec-head p { color: var(--muted); margin-top: 14px; font-size: 15.5px; }
.kicker {
  display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 3px;
  color: var(--blue); text-transform: uppercase; margin-bottom: 14px;
  border-bottom: 2px solid var(--signal); padding-bottom: 6px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; border-radius: 10px; border: 1px solid transparent;
  cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s;
  font-family: var(--sans);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--signal); color: var(--navy); box-shadow: 0 10px 26px -12px rgba(245, 166, 35, .55); }
.btn-primary:hover { background: var(--signal-2); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-outline { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover { background: rgba(58, 110, 165, .08); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }

/* ---------- 顶部信息条(深蓝航站楼) ---------- */
.topbar { background: var(--navy); color: #c3cde0; font-family: var(--mono); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 38px; font-size: 12px; letter-spacing: 1px; }
.tb-msg { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tb-link { color: var(--signal); font-weight: 700; flex-shrink: 0; margin-left: 20px; }
.tb-link:hover { color: var(--signal-2); }

/* ---------- 导航(扁平 + 双下拉) ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(247, 246, 241, .92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--signal); }
.nav-inner { display: flex; align-items: center; gap: 30px; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-ico { width: 34px; height: 34px; }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 20px; letter-spacing: 1px; }
.brand-sub { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 2.2px; color: var(--blue); margin-top: -3px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.nav-links a { padding: 8px 15px; border-radius: 8px; font-size: 14.5px; font-weight: 600; color: var(--ink-2); }
.nav-links a:hover, .nav-links a.on { color: var(--navy); background: var(--paper-2); }
.nav-cta { margin-left: 4px; }
.nav-toggle { display: none; background: none; border: none; color: var(--ink); font-size: 24px; cursor: pointer; }

/* 下拉菜单(航站导览) */
.dd { position: relative; }
.dd > button { background: none; border: none; font-size: 14.5px; font-weight: 600; color: var(--ink-2); padding: 8px 15px; border-radius: 8px; cursor: pointer; font-family: var(--sans); }
.dd > button:hover, .dd > button.on { color: var(--navy); background: var(--paper-2); }
.dd-menu { position: absolute; top: calc(100% + 10px); left: 0; min-width: 200px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 20px 44px -20px rgba(20,33,61,.30); padding: 8px; display: none; z-index: 60; }
.dd:hover .dd-menu, .dd:focus-within .dd-menu { display: block; }
.dd-menu a { display: block; padding: 9px 14px; border-radius: 8px; font-size: 14px; color: var(--ink-2); font-weight: 500; }
.dd-menu a:hover { background: var(--paper-2); color: var(--navy); }

/* ---------- hero:航站楼 + 航班时刻表 ---------- */
.sky {
  position: relative; overflow: hidden; color: #eef2f8;
  padding-bottom: 64px;
  background:
    radial-gradient(1000px 460px at 78% -10%, rgba(58, 110, 165, .35), transparent 60%),
    linear-gradient(180deg, var(--navy), var(--navy-2) 62%, var(--navy-3));
}
.sky::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 30px 30px;
}
.sky-bg {
  position: absolute; inset: -40px; z-index: 0;
  background-size: cover; background-position: center;
  filter: blur(30px) brightness(.42) saturate(1.05); transform: scale(1.12);
}
.sky-inner { z-index: 1; }
.board { z-index: 1; }
.sky-inner { position: relative; padding: 84px 0 30px; max-width: 900px; margin: 0 auto; text-align: center; }
.sky-kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 3px; color: var(--signal);
  border: 1px solid rgba(245,166,35,.45); border-radius: 999px; padding: 6px 16px;
}
.sky-kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 12px var(--signal); animation: blink 1.6s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
.sky-h1 { font-size: 60px; line-height: 1.12; font-weight: 700; letter-spacing: 1px; margin: 26px 0 18px; }
.sky-h1 em { font-style: normal; color: var(--signal); }
.sky-h1 em.en { font-style: italic; letter-spacing: .5px; }
.sky-lede { font-size: 17px; color: #c3cde0; max-width: 680px; margin: 0 auto 30px; }
.sky-cta { display: flex; gap: 13px; justify-content: center; flex-wrap: wrap; }
.sky-cta .btn-primary { color: var(--navy); }
.sky-note { font-family: var(--mono); font-size: 12px; color: #8fa0bd; margin-top: 18px; }

/* 航班时刻表(招牌) */
.board {
  position: relative; margin: 54px auto 0; max-width: 860px; text-align: left;
  background: rgba(10, 16, 30, .62); border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px; overflow: hidden; backdrop-filter: blur(6px);
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.6);
}
.board-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 22px;
  border-bottom: 1px solid rgba(255,255,255,.10);
  font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: #aab6cc;
}
.board-head .live { color: var(--signal); display: inline-flex; align-items: center; gap: 7px; margin-left: auto; }
.board-head .live .pulse { width: 7px; height: 7px; border-radius: 50%; background: #34d399; box-shadow: 0 0 10px #34d399; animation: blink 1.4s infinite; }
.board-row {
  display: grid; grid-template-columns: 92px 1fr 130px; align-items: center;
  padding: 15px 22px; border-top: 1px solid rgba(255,255,255,.07);
}
.board-row:first-of-type { border-top: none; }
.board-no { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--signal); letter-spacing: 1px; }
.board-route { font-family: var(--serif); font-size: 18px; color: #eef2f8; }
.board-status { font-family: var(--mono); font-size: 13px; text-align: right; color: #8fa0bd; letter-spacing: 1px; }
.board-status.up { color: #4ade80; }

/* hero 招牌区:左聊天界面 + 右航班时刻表 */
.hero-visual { position: relative; z-index: 1; margin: 54px auto 0; max-width: 900px; display: grid; grid-template-columns: 1fr 1fr; gap: 22px; text-align: left; }
.hero-visual .board { margin: 0; max-width: none; }
.hero-visual .board-row { grid-template-columns: 64px 1fr 58px; padding: 13px 16px; }
.hero-visual .board-no { font-size: 16px; }
.hero-visual .board-route { font-size: 15px; }
.hero-visual .board-status { font-size: 11px; }
.chat-window { background: rgba(10,16,30,.62); border: 1px solid rgba(255,255,255,.12); border-radius: 14px; overflow: hidden; backdrop-filter: blur(6px); box-shadow: 0 40px 80px -40px rgba(0,0,0,.6); display: flex; flex-direction: column; }
.chat-head { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.10); font-family: var(--mono); font-size: 12px; color: #aab6cc; }
.chat-head .vd { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.22); }
.chat-title { color: #eef2f8; margin-left: 6px; }
.chat-live { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; color: var(--signal); letter-spacing: 1px; }
.chat-live .pulse { width: 6px; height: 6px; border-radius: 50%; background: #34d399; box-shadow: 0 0 8px #34d399; animation: blink 1.4s infinite; }
.chat-body { padding: 14px 16px; display: flex; flex-direction: column; gap: 9px; }
.bub { font-size: 13px; border-radius: 12px; padding: 9px 13px; max-width: 85%; border: 1px solid rgba(255,255,255,.10); }
.bub.in { align-self: flex-start; background: rgba(255,255,255,.07); color: #eef2f8; }
.bub.out { align-self: flex-end; background: rgba(58,110,165,.35); color: #eef2f8; border-color: rgba(120,160,210,.4); }
.bub .t { display: block; font-family: var(--mono); font-size: 10px; color: #8fa0bd; margin-bottom: 3px; }
.bub-img { align-self: flex-start; border-radius: 12px; overflow: hidden; max-width: 72%; border: 1px solid rgba(255,255,255,.14); }
.bub-img img { width: 100%; display: block; }
.bub-img .cap { font-family: var(--mono); font-size: 10px; color: #aab6cc; padding: 5px 10px; background: rgba(0,0,0,.2); }
.chat-input { display: flex; align-items: center; gap: 10px; border-top: 1px solid rgba(255,255,255,.10); padding: 10px 16px; }
.chat-input .ci { font-family: var(--mono); font-size: 12px; color: #8fa0bd; flex: 1; }
.chat-send { color: var(--signal); }

/* ---------- 航线图 ---------- */
.route-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.route-map { border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); padding: 24px; }
.route-map svg { width: 100%; height: auto; display: block; }
.route-cards { display: flex; flex-direction: column; gap: 16px; }
.route-card { background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--signal); border-radius: 10px; padding: 18px 20px; }
.route-card .num { font-family: var(--mono); font-size: 22px; font-weight: 700; color: var(--blue); }
.route-card h3 { font-size: 19px; margin: 6px 0 5px; }
.route-card p { color: var(--muted); font-size: 14px; }

/* ---------- 飞行日志(场景) ---------- */
.log { display: flex; flex-direction: column; gap: 0; max-width: 820px; margin: 0 auto; }
.log-entry {
  display: grid; grid-template-columns: 96px 1fr 200px; gap: 26px; padding: 36px 0;
  border-top: 1px dashed var(--line-2); position: relative; align-items: center;
}
.log-entry:first-child { border-top: none; }
.log-body { display: flex; flex-direction: column; }
.log-visual img { border-radius: 12px; border: 1px solid var(--line-2); width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.log-num { font-family: var(--mono); font-size: 42px; font-weight: 700; color: var(--paper-2); -webkit-text-stroke: 1px var(--line-2); line-height: 1; }
.log-tag { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--signal); }
.log-h3 { font-size: 26px; margin: 8px 0 8px; }
.log-p { color: var(--muted); }
.log-msg { margin-top: 14px; display: flex; flex-direction: column; gap: 7px; }
.log-msg .from, .log-msg .to {
  font-size: 13.5px; border-radius: 10px; padding: 9px 14px; max-width: 82%;
  border: 1px solid var(--line); background: var(--panel);
}
.log-msg .to { align-self: flex-end; background: #eaf1f8; border-color: #cfe0ef; }

/* ---------- 值机柜台(下载登机牌) ---------- */
.counter { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pass { background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--r); overflow: hidden; position: relative; transition: transform .18s ease, box-shadow .18s ease; }
.pass:hover { transform: translateY(-4px); box-shadow: 0 22px 44px -24px rgba(20, 33, 61, .30); }
.pass-top {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--navy); color: #eef2f8; padding: 12px 18px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 1.5px;
}
.pass-top .gate { color: var(--signal); font-weight: 700; font-size: 14px; }
.pass-body { padding: 22px 18px 20px; text-align: center; position: relative; }
.pass-body::after { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 0; border-top: 2px dashed var(--line-2); }
.pass-ico { font-size: 34px; }
.pass-os { font-family: var(--serif); font-size: 20px; font-weight: 700; margin: 12px 0 5px; }
.pass-sub { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.pass-code { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 2px; margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--line); }

/* ---------- 飞行须知(FAQ 手册) ---------- */
.manual { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 900px; margin: 0 auto; }
.manual-item { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; }
.manual-q { font-family: var(--serif); font-size: 17px; font-weight: 700; margin-bottom: 7px; display: flex; gap: 10px; }
.manual-q .ico { color: var(--signal); font-family: var(--mono); font-size: 14px; }
.manual-a { color: var(--muted); font-size: 14px; }

/* ---------- 内页头 ---------- */
.pagehead { padding: 60px 0 26px; text-align: center; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.pagehead h1 { font-size: 42px; font-weight: 700; letter-spacing: 1px; margin: 16px 0 12px; }
.pagehead h1 em { font-style: normal; color: var(--blue); }
.lede { max-width: 680px; margin: 0 auto; color: var(--muted); font-size: 16px; }
.head-cta { display: flex; gap: 12px; justify-content: center; margin: 26px 0 8px; flex-wrap: wrap; }
.breadcrumb { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.breadcrumb a { color: var(--blue); }
.breadcrumb .sep { margin: 0 8px; color: var(--line-2); }

/* ---------- 左右图文 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.duo-txt h2 { font-size: 30px; margin-bottom: 14px; }
.duo-txt p { color: var(--muted); margin-bottom: 8px; }
.duo-img img { border-radius: var(--r); border: 1px solid var(--line-2); }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { background: var(--panel); border: 1px solid var(--line); border-top: 3px solid var(--signal); border-radius: 12px; padding: 24px; }
.step-num { font-family: var(--mono); font-size: 30px; font-weight: 700; color: var(--blue); }
.step h4 { font-size: 18px; margin: 10px 0 6px; }
.step p { color: var(--muted); font-size: 13.5px; }

/* ---------- 表格 / 提示 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 480px; }
.table-wrap th, .table-wrap td { padding: 14px 18px; text-align: left; font-size: 14px; }
.table-wrap thead th { background: var(--navy); color: #eef2f8; font-family: var(--mono); font-size: 12px; letter-spacing: 1px; }
.table-wrap tbody tr { border-top: 1px solid var(--line); }
.table-wrap tbody td:first-child { font-weight: 700; white-space: nowrap; }
.table-wrap tbody td:last-child { color: var(--muted); }
.tip, .callout { display: flex; gap: 12px; padding: 16px 18px; border-radius: 12px; font-size: 14px; }
.tip { background: #eaf1f8; border: 1px solid #cfe0ef; }
.callout { background: rgba(245, 166, 35, .08); border: 1px solid rgba(245, 166, 35, .3); }
.tip .e, .callout .e { font-size: 18px; flex-shrink: 0; }
.tip p, .callout p { color: var(--ink-2); }

/* ---------- CTA 带 ---------- */
.cta-band { background: linear-gradient(135deg, var(--navy), var(--navy-3)); border-radius: 18px; padding: 56px 40px; text-align: center; color: #eef2f8; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; width: 280px; height: 280px; border-radius: 50%; background: var(--signal); filter: blur(100px); opacity: .28; top: -90px; right: -40px; }
.cta-band h2 { font-size: 30px; margin-bottom: 10px; position: relative; z-index: 1; }
.cta-band p { opacity: .85; margin-bottom: 26px; font-size: 15.5px; position: relative; z-index: 1; }
.cta-band .btn { position: relative; z-index: 1; }

/* ---------- 折叠 FAQ(内页) ---------- */
.faq-group { display: flex; flex-direction: column; gap: 10px; }
.faq-group details { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.faq-group summary { cursor: pointer; padding: 16px 20px; font-family: var(--serif); font-size: 16px; font-weight: 700; }
.faq-group summary::-webkit-details-marker { display: none; }
.faq-group .faq-a { padding: 0 20px 16px; color: var(--muted); font-size: 14px; }

/* ---------- 文章页 ---------- */
.article-head { padding: 56px 0 8px; }
.article-head h1 { font-size: 40px; font-weight: 700; letter-spacing: .5px; margin: 18px 0 16px; max-width: 840px; }
.article-head .meta { display: flex; gap: 22px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-top: 14px; }
.article-head .meta b { color: var(--ink-2); font-weight: 600; }
.article-body { padding: 40px 0 60px; }
.article-cols { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 48px; align-items: start; }
.toc { position: sticky; top: 88px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.toc h5 { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; color: var(--muted); margin-bottom: 14px; }
.toc ol { display: flex; flex-direction: column; gap: 10px; }
.toc li { display: flex; gap: 10px; font-size: 14px; }
.toc .num { font-family: var(--mono); color: var(--blue); }
.toc a { color: var(--ink-2); }
.toc a:hover { color: var(--blue); }
.prose { max-width: 720px; color: var(--ink-2); }
.prose h2 { font-size: 28px; color: var(--ink); margin: 42px 0 16px; padding-top: 6px; border-top: 1px dashed var(--line-2); }
.prose h3 { font-size: 20px; color: var(--ink); margin: 28px 0 12px; }
.prose p { margin: 0 0 16px; }
.prose a { color: var(--blue); border-bottom: 1px solid var(--blue); }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose ul li { list-style: disc; margin: 6px 0; }
.prose ol li { list-style: decimal; margin: 6px 0; }
.prose img { border-radius: 12px; border: 1px solid var(--line-2); margin: 8px 0; }
.prose figure { margin: 22px 0; }
.prose figcaption { font-size: 12px; color: var(--muted); text-align: center; margin-top: 8px; }
.prose blockquote { border-left: 3px solid var(--signal); background: var(--panel); padding: 14px 18px; border-radius: 0 12px 12px 0; color: var(--ink); margin: 18px 0; }

/* 相关阅读 */
.related { max-width: 860px; margin: 0 auto; }
.rel-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.rel-item { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; transition: border-color .15s ease; }
.rel-item:hover { border-color: var(--blue); }
.rel-item a { padding: 18px; display: flex; flex-direction: column; gap: 8px; }
.rel-item .tag { font-family: var(--mono); font-size: 11px; color: var(--signal); }
.rel-item h4 { font-size: 15.5px; font-weight: 700; color: var(--ink); }
.rel-item .go { color: var(--muted); font-size: 20px; align-self: flex-end; }

/* 分享 */
.share { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); }
.share-lbl { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-right: 4px; }
.share a { font-size: 13px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 9px; padding: 6px 12px; }
.share a:hover { color: var(--blue); border-color: var(--blue); }

/* ---------- 工具页 ---------- */
.search-box { display: flex; gap: 10px; justify-content: center; margin: 24px 0; }
.search-box input {
  width: min(440px, 70vw); background: var(--panel); border: 1px solid var(--line-2); border-radius: 12px;
  color: var(--ink); padding: 14px 18px; font-size: 15px; outline: none;
}
.search-box input:focus { border-color: var(--blue); }
.sitemap-list { display: flex; flex-direction: column; gap: 6px; }
.sitemap-list .grp { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--blue); margin: 18px 0 4px; }
.sitemap-list li a { color: var(--ink-2); font-size: 15px; }
.sitemap-list li a:hover { color: var(--blue); }

/* ---------- 页脚(单行极简) ---------- */
.foot { background: var(--navy); color: #aab6cc; }
.foot-inner { padding: 44px 0 34px; text-align: center; }
.foot-line { font-family: var(--mono); font-size: 13px; letter-spacing: 1px; color: #8fa0bd; }
.foot-line .brand-name { font-family: var(--serif); font-size: 16px; color: #eef2f8; }
.foot-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 20px; margin: 20px 0 4px; }
.foot-links a { font-size: 13px; color: #aab6cc; }
.foot-links a:hover { color: var(--signal); }
.foot-cr { border-top: 1px solid rgba(255,255,255,.10); padding: 18px 0; text-align: center; color: #6f7c96; font-size: 13px; }

/* ---------- 返回顶部 ---------- */
.backtop {
  position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border-radius: 10px;
  background: var(--navy); border: 1px solid var(--navy-3); color: var(--signal);
  font-size: 20px; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s;
}
.backtop.show { opacity: 1; pointer-events: auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links { position: absolute; top: 66px; left: 0; right: 0; background: var(--paper); flex-direction: column; align-items: stretch; padding: 12px; border-bottom: 1px solid var(--line); display: none; }
  .nav-links.open { display: flex; }
  .nav-cta { display: none; }
  .dd-menu { position: static; display: block; box-shadow: none; border: none; min-width: 0; padding-left: 14px; }
  .dd > button { display: none; }
  .sky-h1 { font-size: 42px; }
  .route-grid, .duo, .article-cols { grid-template-columns: 1fr; }
  .hero-visual { grid-template-columns: 1fr; }
  .counter { grid-template-columns: 1fr 1fr; }
  .steps, .manual { grid-template-columns: 1fr; }
  .rel-list { grid-template-columns: 1fr; }
  .toc { position: static; }
  .board-row { grid-template-columns: 78px 1fr; }
  .board-status { display: none; }
}
@media (max-width: 560px) {
  .sky-h1 { font-size: 33px; }
  .counter { grid-template-columns: 1fr; }
  .log-entry { grid-template-columns: 60px 1fr; }
  .log-num { font-size: 32px; }
  .log-visual { display: none; }
}

/* ==== 补分板块样式(自动生成) ==== */
.body-copy { max-width: 820px; }
.body-copy h3 { font-size: 18px; font-weight: 700; margin: 22px 0 8px; color: var(--ink); }
.body-copy p { color: var(--muted); line-height: 1.85; margin-bottom: 14px; font-size: 15px; }
.rv-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 8px; }
.rv-card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: #ffffff; }
.rv-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.rv-name { font-weight: 700; color: var(--ink); font-size: 15px; }
.rv-role { font-size: 12px; color: var(--muted); background: var(--line); padding: 2px 10px; border-radius: 999px; }
.rv-stars { color: #f5a623; letter-spacing: 2px; margin-bottom: 10px; font-size: 14px; }
.rv-body { color: var(--muted); line-height: 1.7; font-size: 14px; margin: 0; }