/* ============================================================
   上中之路 · 设计系统
   纯静态、零依赖、可离线、响应式、可打印
   ============================================================ */

:root {
  /* 品牌色：上中蓝 + 金 */
  --brand: #1f4e6b;
  --brand-700: #173b51;
  --brand-300: #4a7e9e;
  --gold: #c0992f;
  --gold-soft: #e7d9b0;

  --ink: #1c2430;
  --ink-2: #44505f;
  --ink-3: #6b7787;
  --line: #e6e9ef;
  --line-2: #eef1f5;
  --bg: #f6f8fb;
  --card: #ffffff;
  --ok: #2e9c6a;
  --ok-bg: #e7f6ee;
  --warn: #c9772a;
  --warn-bg: #fbf0e3;
  --danger: #c0473f;
  --danger-bg: #fbeae8;

  /* 阶段色 */
  --st-low: #2f8f83;     /* 小学低年级 */
  --st-mid: #2e7bb0;     /* 小学中年级 */
  --st-high: #5a64c4;    /* 小学高年级 */
  --st-jr1: #8a5cc0;     /* 初中预备·初一 */
  --st-jr2: #c0562f;     /* 初中冲刺 */
  --st-sr: #1f4e6b;      /* 高中展望 */

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20,30,45,.04), 0 8px 28px rgba(20,30,45,.06);
  --shadow-sm: 0 1px 2px rgba(20,30,45,.05), 0 3px 10px rgba(20,30,45,.05);
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .4em; font-weight: 700; letter-spacing: .2px; }
p { margin: 0 0 .8em; }
ul, ol { margin: 0 0 .8em; padding-left: 1.2em; }
li { margin: .25em 0; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--ink-3); }
.tag {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; background: var(--line-2); color: var(--ink-2);
  white-space: nowrap;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(1.6) blur(10px);
  -webkit-backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--brand); font-size: 18px; }
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--brand), var(--brand-300));
  color: #fff; display: grid; place-items: center; font-size: 15px; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.topnav { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.topnav a {
  color: var(--ink-2); font-size: 14px; font-weight: 600; padding: 7px 11px; border-radius: 8px;
}
.topnav a:hover { background: var(--line-2); text-decoration: none; color: var(--ink); }
.progress-pill {
  display: flex; align-items: center; gap: 9px; padding: 5px 12px 5px 6px;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow-sm);
}
.ring { width: 34px; height: 34px; flex: none; }
.ring .bg { stroke: var(--line); }
.ring .fg { stroke: var(--gold); transition: stroke-dashoffset .5s ease; stroke-linecap: round; }
.progress-pill .pct { font-weight: 800; font-size: 14px; color: var(--ink); }
.progress-pill .lbl { font-size: 11.5px; color: var(--ink-3); line-height: 1.1; }
.menu-btn { display: none; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(192,153,47,.16), transparent 60%),
    linear-gradient(160deg, var(--brand-700), var(--brand) 60%, #245a7a);
  color: #eaf1f6; padding: 54px 0 60px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 22px 22px; opacity: .5;
}
.hero .wrap { position: relative; z-index: 1; }
.hero .eyebrow { color: var(--gold-soft); font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; }
.hero h1 { font-size: clamp(28px, 4.4vw, 46px); margin: 10px 0 14px; color: #fff; }
.hero h1 .accent { color: var(--gold-soft); }
.hero .lede { font-size: clamp(15px, 2vw, 18px); max-width: 760px; color: #d7e3ec; }
.hero .meta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero .chip {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18);
  padding: 7px 14px; border-radius: 999px; font-size: 13.5px; font-weight: 600; color: #eaf1f6;
}
.hero .chip b { color: #fff; }

/* ---------- 区块 ---------- */
section { padding: 46px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }
.sec-head { margin-bottom: 26px; }
.sec-head .kicker { color: var(--gold); font-weight: 800; font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; }
.sec-head h2 { font-size: clamp(22px, 3vw, 30px); margin: 6px 0 6px; color: var(--ink); }
.sec-head .sub { color: var(--ink-3); max-width: 760px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 16px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 17px; }

/* ---------- 原则 / 总纲 ---------- */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.principle { display: flex; gap: 13px; align-items: flex-start; }
.principle .num {
  flex: none; width: 30px; height: 30px; border-radius: 9px; background: var(--brand); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 14px;
}
.principle .t { font-weight: 700; margin-bottom: 1px; }
.principle .d { color: var(--ink-2); font-size: 14.5px; }

/* ---------- 路径选择 ---------- */
.path-card { position: relative; display: flex; flex-direction: column; }
.path-card .head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.path-card .icon { font-size: 22px; }
.path-card .diff { margin-left: auto; }
.path-card .summary { color: var(--ink-2); font-size: 14.5px; margin-bottom: 12px; }
.path-card .how { font-size: 13.5px; color: var(--ink-3); background: var(--line-2); border-radius: 8px; padding: 9px 11px; margin-bottom: 12px; }
.pc-list { font-size: 13.8px; }
.pc-list .pros li::marker { color: var(--ok); }
.pc-list .cons li::marker { color: var(--danger); }
.pc-list .label { font-weight: 700; font-size: 12.5px; color: var(--ink-3); margin: 6px 0 2px; text-transform: uppercase; letter-spacing: .5px; }
.path-card .fit { margin-top: auto; padding-top: 12px; font-size: 13.5px; }
.path-card .fit b { color: var(--brand); }
.diff-dots { display: inline-flex; gap: 3px; vertical-align: middle; }
.diff-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--line); display: inline-block; }
.diff-dots i.on { background: var(--gold); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; margin-left: 8px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--brand-300), var(--gold)); }
.tl-item { position: relative; padding: 0 0 22px 34px; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--brand); box-shadow: 0 0 0 3px rgba(31,78,107,.1);
}
.tl-item.gate::before { border-color: var(--gold); background: var(--gold); box-shadow: 0 0 0 4px rgba(192,153,47,.18); }
.tl-item .yr { font-weight: 800; color: var(--brand); font-size: 15px; }
.tl-item .yr .gr { color: var(--ink-3); font-weight: 600; font-size: 13px; margin-left: 8px; }
.tl-item .ev { font-size: 14.3px; color: var(--ink-2); margin-top: 2px; }
.tl-item .ev .key { color: var(--gold); font-weight: 700; }

/* ---------- 阶段导航 ---------- */
.stage-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.stage-nav a {
  font-size: 13px; font-weight: 700; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
}
.stage-nav a:hover { text-decoration: none; border-color: var(--brand-300); color: var(--brand); }

/* ---------- 年级卡 ---------- */
.grade {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); margin-bottom: 18px; overflow: hidden;
  border-left: 5px solid var(--gstage, var(--brand));
}
.grade-head {
  display: flex; align-items: center; gap: 14px; padding: 18px 20px; cursor: pointer;
  user-select: none;
}
.grade-head:hover { background: #fbfcfe; }
.grade-badge {
  flex: none; width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--gstage) 12%, #fff); color: var(--gstage);
  font-weight: 800; font-size: 13px; text-align: center; line-height: 1.1; border: 1px solid color-mix(in srgb, var(--gstage) 25%, #fff);
}
.grade-badge small { font-size: 10px; font-weight: 700; opacity: .8; }
.grade-meta { flex: 1; min-width: 0; }
.grade-meta .gtitle { font-size: 18px; font-weight: 800; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.grade-meta .gtitle .age { font-size: 12.5px; color: var(--ink-3); font-weight: 600; }
.grade-meta .gtitle .yr { font-size: 12px; color: var(--ink-3); font-weight: 600; background: var(--line-2); padding: 1px 8px; border-radius: 999px; }
.grade-meta .theme { font-size: 14px; color: var(--ink-2); margin-top: 2px; }
.grade-prog { flex: none; display: flex; align-items: center; gap: 10px; }
.gp-bar { width: 110px; height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; }
.gp-bar > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gstage), var(--gold)); transition: width .4s ease; }
.gp-num { font-size: 13px; font-weight: 800; color: var(--ink-2); min-width: 42px; text-align: right; font-variant-numeric: tabular-nums; }
.chev { flex: none; color: var(--ink-3); transition: transform .25s ease; }
.grade.open .chev { transform: rotate(90deg); }

.grade-body { display: none; padding: 4px 20px 22px; }
.grade.open .grade-body { display: block; }
.north {
  display: flex; gap: 10px; align-items: flex-start; background: color-mix(in srgb, var(--gstage) 7%, #fff);
  border: 1px solid color-mix(in srgb, var(--gstage) 18%, #fff); border-radius: 10px; padding: 11px 14px; margin: 6px 0 18px;
  font-size: 14.5px;
}
.north b { color: var(--gstage); }
.north .star { font-size: 17px; }

/* 学科块 */
.subj { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
.subj-head { display: flex; align-items: center; gap: 10px; padding: 11px 14px; background: #fafbfd; border-bottom: 1px solid var(--line); }
.subj-head .ico { font-size: 18px; }
.subj-head .name { font-weight: 800; font-size: 15px; }
.subj-head .sprog { margin-left: auto; font-size: 12.5px; font-weight: 700; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.subj-body { padding: 12px 14px; }
.subj-target { font-size: 14px; color: var(--ink-2); margin-bottom: 10px; }
.subj-target b { color: var(--ink); }

/* 自检清单 */
.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { margin: 0; }
.check {
  display: flex; align-items: flex-start; gap: 10px; padding: 7px 8px; border-radius: 8px; cursor: pointer;
  font-size: 14.3px; color: var(--ink-2); transition: background .12s;
}
.check:hover { background: var(--line-2); }
.check input { position: absolute; opacity: 0; width: 0; height: 0; }
.check .box {
  flex: none; width: 19px; height: 19px; border-radius: 6px; border: 2px solid #c4ccd6; margin-top: 2px;
  display: grid; place-items: center; transition: all .15s; background: #fff;
}
.check .box svg { width: 12px; height: 12px; stroke: #fff; stroke-width: 3.4; fill: none; stroke-dasharray: 18; stroke-dashoffset: 18; transition: stroke-dashoffset .2s ease; }
.check input:checked ~ .box { background: var(--ok); border-color: var(--ok); }
.check input:checked ~ .box svg { stroke-dashoffset: 0; }
.check input:checked ~ .txt { color: var(--ink-3); text-decoration: line-through; text-decoration-color: var(--ok); }
.check.stretch .box { border-radius: 50%; border-style: dashed; border-color: var(--gold); }
.check.stretch input:checked ~ .box { background: var(--gold); border-color: var(--gold); border-style: solid; }
.check .txt .badge { font-size: 10.5px; font-weight: 800; color: var(--gold); border: 1px solid var(--gold-soft); border-radius: 4px; padding: 0 5px; margin-right: 6px; vertical-align: 1px; }

/* 节点 / 预警 / 家长动作 */
.note-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 6px; }
.note { border-radius: 10px; padding: 12px 14px; font-size: 13.6px; }
.note h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.note ul { padding-left: 1.1em; margin: 0; }
.note.milestones { background: #eef4f8; }
.note.milestones h4 { color: var(--brand); }
.note.redflags { background: var(--danger-bg); }
.note.redflags h4 { color: var(--danger); }
.note.actions { background: var(--ok-bg); }
.note.actions h4 { color: var(--ok); }

/* ---------- 小升初 / 中考 关卡 ---------- */
.gate-block {
  background: linear-gradient(135deg, #fff, #fffaf0);
  border: 1.5px solid var(--gold-soft); border-radius: var(--radius);
  padding: 20px 22px; margin: 6px 0 18px; box-shadow: var(--shadow-sm);
}
.gate-block .gtag { display: inline-block; background: var(--gold); color: #fff; font-weight: 800; font-size: 12px; padding: 3px 12px; border-radius: 999px; letter-spacing: 1px; }
.gate-block h3 { margin-top: 10px; font-size: 19px; color: var(--brand-700); }
.gate-block p { font-size: 14.3px; color: var(--ink-2); }

/* ---------- 竞赛表 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.ctable { width: 100%; border-collapse: collapse; font-size: 13.8px; min-width: 680px; }
.ctable th, .ctable td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.ctable thead th { background: #fafbfd; font-size: 12.5px; text-transform: uppercase; letter-spacing: .5px; color: var(--ink-3); position: sticky; top: 0; }
.ctable tbody tr:hover { background: #fbfcfe; }
.ctable .nm { font-weight: 700; color: var(--ink); }
.tier { font-weight: 800; font-size: 12px; padding: 2px 8px; border-radius: 6px; }
.tier.S { background: #fbe9d6; color: #b15c12; }
.tier.A { background: #e6eef6; color: #2b6491; }
.tier.B { background: #eef1f5; color: #5a6675; }

/* ---------- 决策点 ---------- */
.decision { border: 1px solid var(--line); border-left: 4px solid var(--brand); border-radius: 12px; padding: 16px 18px; margin-bottom: 14px; background: var(--card); box-shadow: var(--shadow-sm); }
.decision .when { font-size: 12px; font-weight: 800; color: var(--gold); letter-spacing: .5px; text-transform: uppercase; }
.decision h3 { font-size: 17px; margin: 4px 0 10px; }
.opt-grid { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-bottom: 10px; }
.opt { border: 1px solid var(--line); border-radius: 9px; padding: 11px 13px; background: #fafbfd; }
.opt .on { font-weight: 800; font-size: 14px; margin-bottom: 4px; }
.opt .pr, .opt .cn { font-size: 13px; margin: 2px 0; }
.opt .pr::before { content: "＋ "; color: var(--ok); font-weight: 800; }
.opt .cn::before { content: "－ "; color: var(--danger); font-weight: 800; }
.decision .reco { background: var(--ok-bg); border-radius: 9px; padding: 10px 13px; font-size: 13.8px; }
.decision .reco b { color: var(--ok); }

/* ---------- 风险 ---------- */
.risk { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 11px; background: var(--warn-bg); border: 1px solid #f1ddc2; margin-bottom: 10px; }
.risk .ic { font-size: 20px; flex: none; }
.risk .t { font-weight: 700; color: var(--warn); }
.risk .d { font-size: 14px; color: var(--ink-2); }
.risk .m { font-size: 13.5px; color: var(--ink-2); margin-top: 4px; }
.risk .m b { color: var(--ok); }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q { padding: 15px 4px; font-weight: 700; cursor: pointer; display: flex; gap: 10px; align-items: center; font-size: 15.5px; }
.faq-q::before { content: "＋"; color: var(--gold); font-weight: 800; transition: transform .2s; }
.faq-item.open .faq-q::before { content: "－"; }
.faq-a { display: none; padding: 0 4px 16px 26px; color: var(--ink-2); font-size: 14.3px; }
.faq-item.open .faq-a { display: block; }

/* ---------- 工具条 ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.btn {
  font-family: inherit; font-size: 13.5px; font-weight: 700; cursor: pointer;
  padding: 8px 15px; border-radius: 9px; border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  transition: all .15s;
}
.btn:hover { border-color: var(--brand-300); color: var(--brand); }
.btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.btn.primary:hover { background: var(--brand-700); color: #fff; }
.btn.ghost-danger:hover { border-color: var(--danger); color: var(--danger); }

/* ---------- 页脚 ---------- */
footer { background: var(--brand-700); color: #cfdbe4; padding: 34px 0; font-size: 13.5px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
footer a { color: var(--gold-soft); }
footer .disclaimer { max-width: 680px; color: #9fb3c0; font-size: 12.5px; line-height: 1.6; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .cols-2, .cols-3, .principles { grid-template-columns: 1fr; }
  .note-grid { grid-template-columns: 1fr; }
  .topnav { display: none; }
  .menu-btn { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 9px; border: 1px solid var(--line); background: var(--card); cursor: pointer; margin-left: auto; }
  .grade-prog .gp-bar { width: 64px; }
  .grade-meta .gtitle .yr { display: none; }
  .hero { padding: 40px 0 44px; }
}
@media (max-width: 520px) {
  .grade-head { gap: 10px; padding: 14px; }
  .grade-badge { width: 44px; height: 44px; }
  .gp-num { display: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .topbar, .menu-btn, .toolbar, .stage-nav, footer .disclaimer { display: none !important; }
  .hero { background: #fff !important; color: #000; }
  .hero h1, .hero h1 .accent { color: #000; }
  .grade-body { display: block !important; }
  .grade { break-inside: avoid; box-shadow: none; }
  body { background: #fff; }
  section { padding: 18px 0; }
}