/* ============ 设计令牌：宣纸 · 墨黛 · 朱砂 ============ */
:root{
  --paper:#f0f1f3;
  --paper-2:#e3e5e9;
  --surface:#ffffff;
  --ink:#20291f;
  --ink-2:#4d574b;
  --ink-3:#7a8072;
  --pine:#1c4d47;
  --pine-2:#2f6f67;
  --pine-soft:#e3ede8;
  --cinnabar:#b13a2c;
  --cinnabar-soft:#f6e3dd;
  --gold:#a7803a;
  --line:#d9dce0;
  --line-strong:#c3c8cd;
  --t-video:#b13a2c;
  --t-book:#34507a;
  --t-doc:#2f6f67;
  --t-paper:#6a4c8a;
  --t-tool:#8a642e;
  --t-data:#0f7370;
  --t-handson:#9a5320;
  --radius:14px;
  --shadow:0 1px 2px rgba(45,38,20,.06),0 6px 18px -10px rgba(45,38,20,.18);
  --shadow-lg:0 2px 4px rgba(45,38,20,.08),0 18px 44px -18px rgba(45,38,20,.28);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px;overflow-x:hidden}
body{
  font-family:var(--sans);
  color:var(--ink);
  overflow-x:hidden;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(177,58,44,.07), transparent 60%),
    radial-gradient(900px 480px at -10% 12%, rgba(28,77,71,.08), transparent 55%),
    var(--paper);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(177,58,44,.18)}
a{color:var(--pine);text-decoration:none}
a:hover{color:var(--cinnabar)}
img,svg{display:block}
.container{max-width:1140px;margin:0 auto;padding:0 28px}
.serif{font-family:var(--serif)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(240,241,243,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-weight:700;font-size:19px;color:var(--ink);white-space:nowrap}
.brand .seal-mini{
  width:32px;height:32px;border-radius:7px;background:var(--cinnabar);color:#fdf6ea;
  display:grid;place-items:center;font-size:17px;transform:rotate(-3deg);
  box-shadow:0 2px 6px rgba(177,58,44,.35);
}
.nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{
  padding:7px 13px;border-radius:999px;font-size:14px;color:var(--ink-2);white-space:nowrap;
  transition:background .2s,color .2s;
}
.nav a:hover{background:var(--paper-2);color:var(--ink)}
.nav a.active{background:var(--pine);color:#f7f2e4}
.progress-chip{
  display:flex;align-items:center;gap:9px;flex-shrink:0;
  border:1px solid var(--line-strong);border-radius:999px;padding:5px 12px 5px 8px;
  background:var(--surface);font-size:12.5px;color:var(--ink-2);
}
.progress-chip .ring{
  width:26px;height:26px;position:relative;
}
.progress-chip .ring svg{transform:rotate(-90deg)}
.progress-chip .ring b{
  position:absolute;inset:0;display:grid;place-items:center;font-size:9.5px;color:var(--pine);
}
.reset-btn{
  border:none;background:none;color:var(--ink-3);font-size:12px;cursor:pointer;
  font-family:var(--sans);padding:4px 6px;border-radius:6px;
}
.reset-btn:hover{color:var(--cinnabar)}

/* ============ 首屏 ============ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-inner{display:grid;grid-template-columns:1.35fr .9fr;gap:40px;align-items:center;padding:84px 0 92px}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.28em;color:var(--cinnabar);font-weight:600;
  margin-bottom:22px;
}
.hero-kicker::before{content:"";width:34px;height:1px;background:var(--cinnabar)}
.hero h1{
  font-family:var(--serif);
  font-size:clamp(2.5rem,5.6vw,4.1rem);
  line-height:1.18;font-weight:900;letter-spacing:.02em;
}
.hero h1 .accent{color:var(--cinnabar);position:relative;white-space:nowrap}
.hero h1 .accent::after{
  content:"";position:absolute;left:0;right:0;bottom:.08em;height:.34em;
  background:rgba(167,128,58,.28);z-index:-1;
}
.hero-sub{margin-top:22px;font-size:17px;color:var(--ink-2);max-width:34em}
.hero-sub strong{color:var(--pine);font-weight:600}
.hero-cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;font-family:var(--sans);
  transition:transform .15s,box-shadow .2s,background .2s;
}
.btn-primary{background:var(--cinnabar);color:#fdf6ea;box-shadow:0 8px 20px -8px rgba(177,58,44,.55)}
.btn-primary:hover{color:#fff;background:#9e3327;transform:translateY(-1px)}
.btn-ghost{border-color:var(--line-strong);color:var(--pine);background:transparent}
.btn-ghost:hover{background:var(--surface);color:var(--cinnabar)}
.hero-meta{margin-top:40px;display:flex;gap:34px;flex-wrap:wrap}
.hero-meta div b{font-family:var(--serif);font-size:28px;color:var(--pine);display:block;line-height:1.2}
.hero-meta div span{font-size:13px;color:var(--ink-3)}
.hero-art{position:relative;display:grid;place-items:center;min-height:320px}
.hero-art img{
  width:min(100%,400px);height:auto;border-radius:24px;
  box-shadow:0 24px 48px -20px rgba(28,77,71,.35),0 4px 12px rgba(32,41,31,.08);
  border:1px solid var(--line);
}

/* ============ 通用区块 ============ */
.section{padding:78px 0}
.section + .section{border-top:1px dashed var(--line-strong)}
.sec-head{margin-bottom:42px;max-width:720px}
.sec-kicker{font-size:12.5px;letter-spacing:.3em;color:var(--cinnabar);font-weight:600;margin-bottom:12px}
.sec-title{font-family:var(--serif);font-size:clamp(1.7rem,3.2vw,2.35rem);font-weight:800;line-height:1.3}
.sec-desc{margin-top:14px;color:var(--ink-2);font-size:15.5px}

/* ============ 总览 ============ */
#overview{background:linear-gradient(180deg,rgba(227,237,232,.45),transparent)}
.overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.phase-tile{
  position:relative;display:block;text-align:left;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px 20px;cursor:pointer;color:var(--ink);
  transition:transform .18s,box-shadow .25s,border-color .2s;
  box-shadow:var(--shadow);
}
.phase-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-strong);color:var(--ink)}
.phase-tile .pt-top{display:flex;align-items:center;gap:13px;margin-bottom:12px}
.seal{
  width:42px;height:42px;border-radius:9px;background:var(--cinnabar);color:#fdf6ea;
  display:grid;place-items:center;font-family:var(--serif);font-size:21px;font-weight:700;
  transform:rotate(-3deg);box-shadow:0 3px 8px rgba(177,58,44,.35);flex-shrink:0;
}
.phase-tile .pt-weeks{font-size:12.5px;color:var(--ink-3)}
.phase-tile h3{font-family:var(--serif);font-size:19px;font-weight:700}
.phase-tile p{font-size:13.5px;color:var(--ink-2);margin-top:6px}
.phase-tile .pt-bar{margin-top:14px;height:5px;border-radius:99px;background:var(--paper-2);overflow:hidden}
.phase-tile .pt-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--pine-2),var(--pine));transition:width .5s ease}
.phase-tile .pt-foot{display:flex;justify-content:space-between;margin-top:8px;font-size:12px;color:var(--ink-3)}
.rhythm{
  margin-top:20px;background:var(--pine);color:#eef3ec;border-radius:var(--radius);
  padding:28px 30px;display:grid;grid-template-columns:1fr 1.4fr;gap:30px;
  box-shadow:var(--shadow-lg);
}
.rhythm h3{font-family:var(--serif);font-size:21px;margin-bottom:8px}
.rhythm p{font-size:14px;color:#c7d6cf}
.rhythm ul{list-style:none;display:grid;gap:10px;font-size:14.5px}
.rhythm li{display:flex;gap:10px;align-items:flex-start}
.rhythm li::before{content:"◆";color:var(--gold);font-size:11px;margin-top:7px}
.rhythm .ratio{display:flex;gap:14px;margin-top:14px;flex-wrap:wrap}
.rhythm .ratio span{background:rgba(255,255,255,.1);padding:5px 13px;border-radius:999px;font-size:13px}

/* ============ 时间轴 ============ */
.timeline-strip{
  margin-top:44px;display:flex;align-items:flex-start;
  overflow-x:auto;padding:8px 2px 18px;gap:0;
}
.ts-item{flex:1;min-width:132px;text-align:center;position:relative;padding:0 8px}
.ts-item::before{
  content:"";position:absolute;top:17px;left:50%;width:100%;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-strong) 0 7px,transparent 7px 13px);
  z-index:0;
}
.ts-item:last-child::before{display:none}
.ts-node{
  position:relative;z-index:1;width:36px;height:36px;border-radius:50%;
  background:var(--surface);border:2px solid var(--pine);color:var(--pine);
  display:grid;place-items:center;font-family:var(--serif);font-weight:700;font-size:16px;
  margin:0 auto 10px;
}
.ts-item b{display:block;font-size:13.5px;font-family:var(--serif)}
.ts-item span{font-size:12px;color:var(--ink-3)}

/* ============ 阶段区块 ============ */
.phase{padding:64px 0;border-top:1px dashed var(--line-strong);scroll-margin-top:76px}
.phase-head{display:flex;gap:22px;align-items:flex-start;margin-bottom:14px}
.phase-head .seal{width:54px;height:54px;font-size:26px;border-radius:11px}
.phase-head h2{font-family:var(--serif);font-size:clamp(1.55rem,2.8vw,2.05rem);font-weight:800;line-height:1.3}
.phase-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:9px}
.chip{
  font-size:12.5px;padding:3px 12px;border-radius:999px;
  background:var(--paper-2);color:var(--ink-2);border:1px solid var(--line);
}
.phase-goal{
  margin:20px 0 26px;padding:20px 24px;border-left:4px solid var(--cinnabar);
  background:rgba(255,253,246,.7);border-radius:0 12px 12px 0;
  color:var(--ink-2);font-size:15px;max-width:860px;
}
.phase-goal b{color:var(--ink)}
.phase-goal .outcomes{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.phase-goal .outcomes span{
  font-size:13px;background:var(--pine-soft);color:var(--pine);
  padding:5px 13px;border-radius:8px;
}
.legend{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:22px;font-size:12.5px;color:var(--ink-3)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:9px;height:9px;border-radius:2px;display:inline-block}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(260px,100%),1fr));gap:15px}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:20px 20px 16px;display:flex;flex-direction:column;
  transition:transform .16s,box-shadow .2s,border-color .2s,opacity .25s;
  border-left-width:4px;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card.is-done{opacity:.62}
.card.is-done h3{text-decoration:line-through;text-decoration-color:var(--pine-2);text-decoration-thickness:1.5px}
.card-tags{display:flex;justify-content:space-between;align-items:center;margin-bottom:11px;gap:8px}
.tag{
  font-size:11.5px;font-weight:600;letter-spacing:.05em;
  padding:3px 10px;border-radius:5px;
}
.tag-视频{background:var(--cinnabar-soft);color:var(--t-video)}
.tag-教材{background:#e3e9f3;color:var(--t-book)}
.tag-文档{background:var(--pine-soft);color:var(--t-doc)}
.tag-论文{background:#ece5f4;color:var(--t-paper)}
.tag-工具{background:#f2e8d4;color:var(--t-tool)}
.tag-数据{background:#dcefec;color:var(--t-data)}
.tag-实战{background:#f5e4d4;color:var(--t-handson)}
.prio{font-size:11.5px;color:var(--ink-3);display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.prio::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--line-strong)}
.prio-1::before{background:var(--cinnabar)}
.prio-1{color:var(--cinnabar);font-weight:600}
.card h3{font-size:16px;line-height:1.5;font-family:var(--serif);font-weight:700;padding-right:4px}
.card .src{font-size:12.5px;color:var(--ink-3);margin-top:4px}
.card .desc{font-size:13.5px;color:var(--ink-2);margin-top:9px;flex:1}
.card-foot{
  margin-top:15px;padding-top:13px;border-top:1px dashed var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:10px;
}
.card-link{font-size:13.5px;font-weight:600;color:var(--pine);display:inline-flex;align-items:center;gap:5px}
.card-link svg{width:12px;height:12px;flex-shrink:0}
.card-link:hover{color:var(--cinnabar)}
.check{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--ink-3);cursor:pointer;user-select:none}
.check input{
  appearance:none;width:17px;height:17px;border:1.6px solid var(--line-strong);border-radius:5px;
  display:grid;place-items:center;cursor:pointer;background:var(--surface);
  transition:background .15s,border-color .15s;flex-shrink:0;
}
.check input::after{
  content:"";width:9px;height:9px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 6.2 4.6 8.8 10 3.2' fill='none' stroke='%23fdf6ea' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/9px no-repeat;
  opacity:0;transition:opacity .12s;
}
.check input:checked{background:var(--pine);border-color:var(--pine)}
.check input:checked::after{opacity:1}
.check input:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px}
.card[data-type="视频"]{border-left-color:var(--t-video)}
.card[data-type="教材"]{border-left-color:var(--t-book)}
.card[data-type="文档"]{border-left-color:var(--t-doc)}
.card[data-type="论文"]{border-left-color:var(--t-paper)}
.card[data-type="工具"]{border-left-color:var(--t-tool)}
.card[data-type="数据"]{border-left-color:var(--t-data)}
.card[data-type="实战"]{border-left-color:var(--t-handson)}

/* ============ 核心/拓展 视图切换 ============ */
.mode-switch{
  display:inline-flex;background:var(--paper-2);border:1px solid var(--line);
  border-radius:999px;padding:4px;gap:2px;margin-top:22px;
}
.mode-switch button{
  border:0;background:transparent;padding:8px 22px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;font-family:var(--sans);
  transition:background .2s,color .2s,box-shadow .2s;
}
.mode-switch button:hover{color:var(--ink)}
.mode-switch button.active{background:var(--surface);color:var(--pine);box-shadow:var(--shadow)}
body[data-mode="core"] .card[data-p="2"],
body[data-mode="core"] .card[data-p="3"]{display:none}
body[data-mode="core"] .only-all,
body[data-mode="all"] .only-core{display:none!important}
.extra-hint{
  margin-top:18px;padding:13px 18px;border:1px dashed var(--line-strong);border-radius:10px;
  background:rgba(255,253,246,.6);font-size:13.5px;color:var(--ink-3);
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
}
.link-btn{
  border:0;background:var(--pine-soft);color:var(--pine);font-family:var(--sans);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;cursor:pointer;
  transition:background .2s,color .2s;
}
.link-btn:hover{background:var(--pine);color:#f7f2e4}

/* ============ 里程碑 ============ */
.milestone-list{position:relative;margin-left:8px}
.milestone-list::before{
  content:"";position:absolute;left:21px;top:12px;bottom:12px;width:2px;
  background:repeating-linear-gradient(180deg,var(--line-strong) 0 8px,transparent 8px 14px);
}
.ms-item{position:relative;padding:0 0 26px 66px}
.ms-item:last-child{padding-bottom:0}
.ms-node{
  position:absolute;left:0;top:0;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:2.5px solid var(--gold);color:var(--gold);
  display:grid;place-items:center;font-family:var(--serif);font-weight:800;font-size:17px;
  z-index:1;transition:background .2s,color .2s;
}
.ms-item.is-done .ms-node{background:var(--pine);border-color:var(--pine);color:#f7f2e4}
.ms-body{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:18px 22px;box-shadow:var(--shadow);
}
.ms-item.is-done .ms-body{opacity:.68}
.ms-item.is-done h3{text-decoration:line-through;text-decoration-color:var(--pine-2)}
.ms-body h3{font-family:var(--serif);font-size:16.5px;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.ms-body h3 .ms-when{font-family:var(--sans);font-size:12.5px;color:var(--cinnabar);font-weight:600}
.ms-body p{font-size:13.8px;color:var(--ink-2);margin-top:6px}
.ms-body .deliver{display:inline-block;margin-top:9px;font-size:12.8px;color:var(--pine);background:var(--pine-soft);padding:3px 11px;border-radius:6px}

/* ============ 环境配置 ============ */
#setup{background:linear-gradient(180deg,transparent,rgba(227,237,232,.4))}
.setup-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);min-width:0;
}
.step h3{font-family:var(--serif);font-size:17px;display:flex;gap:11px;align-items:center}
.step h3 .n{
  width:28px;height:28px;border-radius:8px;background:var(--pine);color:#f7f2e4;
  display:grid;place-items:center;font-size:14px;font-family:var(--sans);font-weight:700;flex-shrink:0;
}
.step p{font-size:13.8px;color:var(--ink-2);margin:10px 0 14px}
.codeblock{position:relative}
pre{
  background:#20291f;color:#e6e2d2;border-radius:9px;padding:15px 16px;
  font-family:var(--mono);font-size:12.8px;line-height:1.7;overflow-x:auto;
}
pre .c{color:#8aa39a}
pre .k{color:#d49a6a}
.copy-btn{
  position:absolute;top:8px;right:8px;font-size:11.5px;padding:4px 10px;border-radius:6px;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#cfd6cc;
  cursor:pointer;font-family:var(--sans);transition:background .15s;
}
.copy-btn:hover{background:rgba(255,255,255,.2)}
.copy-btn.ok{background:var(--pine-2);border-color:var(--pine-2);color:#fff}
.setup-note{
  grid-column:1/-1;margin-top:4px;padding:20px 24px;border-radius:var(--radius);
  background:var(--cinnabar-soft);border:1px solid #e3c0b6;font-size:14px;color:#6e3025;
}
.setup-note b{color:var(--cinnabar)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:880px}
details.faq{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:0 22px;transition:border-color .2s,box-shadow .2s;
}
details.faq[open]{border-color:var(--line-strong);box-shadow:var(--shadow)}
details.faq summary{
  list-style:none;cursor:pointer;padding:18px 28px 18px 0;font-weight:600;font-size:15.5px;
  font-family:var(--serif);position:relative;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"";position:absolute;right:2px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--cinnabar);border-bottom:2px solid var(--cinnabar);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s;
}
details.faq[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
details.faq summary:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px;border-radius:6px}
.faq-a{padding:0 0 20px;color:var(--ink-2);font-size:14.3px}
.faq-a strong{color:var(--pine)}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--paper-2);padding:52px 0 40px;margin-top:20px}
.footer-quote{font-family:var(--serif);font-size:clamp(1.2rem,2.4vw,1.55rem);text-align:center;max-width:720px;margin:0 auto 26px;line-height:1.9;color:var(--pine)}
.footer-meta{text-align:center;font-size:13px;color:var(--ink-3);line-height:2}
.footer-meta a{color:var(--ink-2)}

/* ============ 动效与可达性 ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
:focus-visible{outline:2.5px solid var(--cinnabar);outline-offset:2px;border-radius:4px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;padding:60px 0 64px}
  .hero-art{display:none}
  .overview-grid{grid-template-columns:repeat(2,1fr)}
  .rhythm{grid-template-columns:1fr;gap:18px}
  .setup-grid{grid-template-columns:1fr}
}
@media (max-width:680px){
  .container{padding:0 18px}
  .header-inner{gap:12px;height:auto;padding:10px 0;flex-wrap:wrap}
  .nav{order:3;width:100%;margin:0;padding:0 0 2px}
  .progress-chip{margin-left:auto}
  .overview-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .hero-meta{gap:22px}
  .phase-head{gap:15px}
  .phase-head .seal{width:46px;height:46px;font-size:22px}
  .rhythm{padding:22px}
}

/* ============ 深色模式 ============ */
html[data-theme="dark"]{
  --paper:#15191c;
  --paper-2:#1b2125;
  --surface:#20272c;
  --ink:#e4e2dc;
  --ink-2:#b6bab2;
  --ink-3:#868b83;
  --pine:#8fc2b8;
  --pine-2:#a9d2ca;
  --pine-soft:#22332f;
  --cinnabar:#e08570;
  --cinnabar-soft:#3a2723;
  --gold:#c9a35c;
  --line:#333a3f;
  --line-strong:#454d52;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 18px -10px rgba(0,0,0,.5);
  --shadow-lg:0 2px 4px rgba(0,0,0,.35),0 18px 44px -18px rgba(0,0,0,.6);
  color-scheme:dark;
}
html[data-theme="dark"] .phase-goal{background:rgba(32,39,44,.7)}
html[data-theme="dark"] .hero-art img{filter:brightness(.88) saturate(.95)}
html[data-theme="dark"] pre{background:#111517 !important}
.theme-btn{padding:4px 8px;font-size:14px;line-height:1}

/* ============ 常见误区 ============ */
.pitfalls{
  margin:-12px 0 26px;padding:16px 22px;max-width:860px;
  border:1px dashed var(--line-strong);border-left:4px solid var(--gold);
  border-radius:0 12px 12px 0;background:var(--surface);
  font-size:14px;color:var(--ink-2);
}
.pitfalls>b{color:var(--gold)}
.pitfalls ul{padding-left:18px;margin-top:8px;display:grid;gap:6px;line-height:1.7}

/* ============ 交叉引用 ============ */
.chip-link{text-decoration:none;color:var(--pine-2);border-color:var(--pine);cursor:pointer}
.chip-link:hover{background:var(--pine);color:#fff}
html[data-theme="dark"] .chip-link:hover{color:#10191a}

/* ============ 进度备份 ============ */
.progress-tools{margin-top:10px;display:flex;gap:10px;justify-content:center;align-items:center;flex-wrap:wrap}
.progress-tools button{
  font:inherit;font-size:12.5px;color:var(--pine-2);background:none;
  border:1px solid var(--line-strong);border-radius:8px;padding:4px 14px;cursor:pointer;
}
.progress-tools button:hover{border-color:var(--pine);color:var(--pine)}

/* ============ 打印样式 ============ */
@media print{
  .site-header,.mode-switch,.hero-cta,.check,.copy-btn,.extra-hint,
  .progress-tools,.back-top,.legend{display:none!important}
  .reveal{opacity:1!important;transform:none!important}
  body[data-mode="core"] .card[data-p="2"],
  body[data-mode="core"] .card[data-p="3"]{display:block!important}
  .card .card-link{pointer-events:none}
  .card .card-link svg{display:none}
  .card .card-link::after{
    content:"  " attr(href);font-size:11px;color:var(--ink-3);word-break:break-all;
  }
  .phase{break-before:page}
  .card,.ms-item,.faq,.phase-goal,.pitfalls{break-inside:avoid}
  .tag,.seal,.seal-mini,.prio,.chip{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  body{background:#fff}
  .site-footer{margin-top:0}
}