:root{
  --paper:#faf6ee; --paper2:#f3ece0; --ink:#2b2521; --ink-soft:#5c544b;
  --terra:#b5532f; --terra-d:#943f20; --gold:#c2913a; --line:#e3d9c7;
  --ok:#5a8f4f;
}
*{box-sizing:border-box;margin:0;padding:0}
/* 兜底：hidden 属性永远生效，不被任何 display 规则覆盖（含 #installBtn/#iosTip/.chat-panel 及未来元素） */
[hidden]{display:none!important}
html{scroll-behavior:smooth}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--paper);color:var(--ink);line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand,.idx{font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif}
em{font-style:normal;color:var(--terra)}
section{max-width:980px;margin:0 auto;padding:0 22px}

/* nav */
.nav{
  position:sticky;top:0;z-index:50;display:flex;flex-direction:column;align-items:center;gap:18px;
  padding:calc(14px + env(safe-area-inset-top)) 20px 16px;
  background:rgba(250,246,238,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.brand{font-weight:900;font-size:1.1rem;display:flex;align-items:center;gap:8px;color:var(--ink-soft)}
.seal{
  display:grid;place-items:center;width:30px;height:30px;border-radius:6px;
  background:var(--terra);color:#fff;font-size:.95rem;
}
/* 步骤进度（居中 · 醒目 · 连线） */
.stepper{
  list-style:none;display:flex;align-items:flex-start;justify-content:center;
  gap:0;width:100%;max-width:760px;margin:0 auto;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px 4px;
}
.stepper::-webkit-scrollbar{display:none}
.snode{
  flex:1 1 0;min-width:74px;display:flex;flex-direction:column;align-items:center;gap:9px;
  cursor:pointer;position:relative;padding:2px 2px 0;
}
.snode::before{ /* 连接线：连到上一个节点圆心 */
  content:"";position:absolute;top:19px;right:50%;left:-50%;height:3px;
  background:var(--line);border-radius:3px;z-index:0;
}
.snode:first-child::before{display:none}
.sdot{
  position:relative;z-index:1;width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;background:#fff;border:2px solid var(--line);
  color:var(--ink-soft);font-weight:800;font-size:1rem;transition:.2s;
}
.slabel{
  font-size:.86rem;color:var(--ink-soft);white-space:nowrap;font-weight:500;transition:.2s;
}
/* 已完成 */
.snode.done .sdot{background:var(--gold);border-color:var(--gold);color:#fff}
.snode.done .slabel{color:var(--ink)}
.snode.done::before{background:var(--gold)}
/* 当前步：最醒目 */
.snode.current .sdot{
  background:var(--terra);border-color:var(--terra);color:#fff;
  transform:scale(1.18);box-shadow:0 8px 22px rgba(181,83,47,.4);
}
.snode.current .slabel{color:var(--terra);font-weight:800;font-size:.92rem}
.snode.current::before{background:var(--gold)}
/* 未解锁 */
.snode.locked{cursor:not-allowed}
.snode.locked .sdot{background:var(--paper2);border-color:var(--line);color:var(--ink-soft);opacity:.6}
.snode.locked .slabel{opacity:.5}
.snode:not(.locked):not(.current):hover .sdot{border-color:var(--terra);color:var(--terra)}

/* 真诚提示条 */
.sincerity-bar{
  text-align:center;font-size:.86rem;
  color:#fff;background:var(--ink);padding:10px 16px;line-height:1.6;
}
.sincerity-bar b{color:var(--gold)}

/* 预览模式 */
.preview-bar{
  text-align:center;font-size:.88rem;background:#fbf0d8;color:#7a5a16;
  border-bottom:1px solid #e7d3a3;padding:10px 16px;line-height:1.7;
}
.preview-bar b{color:var(--terra-d)}
.preview-bar button{
  margin-left:10px;background:var(--terra);color:#fff;border:0;border-radius:999px;
  padding:6px 14px;font-family:inherit;font-size:.82rem;cursor:pointer;
}
.preview-bar button:hover{background:var(--terra-d)}
/* 预览态：可读、可滚动，但不可操作 */
.step.preview .card,
.step.preview .step-gate{opacity:.5;filter:saturate(.55)}
.step.preview .card *,
.step.preview .step-gate button,
.step.preview .step-gate input,
.step.preview .step-gate textarea{pointer-events:none}
.step.preview .card::after{
  content:"预览 · 完成前序步骤后可在此动手";
  position:absolute;top:10px;right:14px;background:var(--ink);color:var(--paper);
  font-size:.72rem;padding:4px 10px;border-radius:999px;pointer-events:none;
}
.step.preview .card{position:relative}

/* 步骤容器 */
#stepWrap{max-width:900px;margin:0 auto;padding:42px 22px 90px}
.step-head{text-align:center;max-width:680px;margin:0 auto 28px}
.step-no{
  display:inline-block;letter-spacing:.18em;font-size:.78rem;color:var(--gold);
  margin-bottom:10px;font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;
}
.step-head h2{font-size:clamp(1.7rem,4.4vw,2.4rem);font-weight:700;font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif}
.step-head p{margin-top:12px;color:var(--ink-soft)}
.step-head .streak-strip{margin-top:18px}
.sincere-quote{
  font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;font-size:1.1rem;color:var(--terra);
  border-left:4px solid var(--gold);padding:6px 0 6px 16px;margin-bottom:20px;line-height:1.9;
}
.card label strong{color:var(--terra)}

/* 检查点闸门 */
.step-gate{
  max-width:820px;margin:26px auto 0;text-align:center;
  border-top:1px dashed var(--line);padding-top:24px;
}
.gate-desc{color:var(--ink-soft);font-size:.92rem;margin-bottom:14px}
.gate-msg{margin-top:12px;font-size:.92rem;min-height:20px}
.gate-msg.bad{color:var(--terra-d)}
.gate-msg.ok{color:var(--ok);font-weight:700}

/* Toast */
#toast{
  position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom));
  transform:translate(-50%,20px);z-index:90;background:var(--ink);color:var(--paper);
  padding:12px 20px;border-radius:999px;font-size:.88rem;max-width:88vw;text-align:center;
  opacity:0;pointer-events:none;transition:.3s;box-shadow:0 12px 30px rgba(0,0,0,.25);
}
#toast.show{opacity:1;transform:translate(-50%,0)}

@media(max-width:720px){
  .nav{gap:12px;padding:calc(10px + env(safe-area-inset-top)) 10px 12px}
  .stepper{justify-content:flex-start}
  .snode{min-width:62px;gap:7px}
  .sdot{width:34px;height:34px;font-size:.9rem}
  .slabel{font-size:.74rem}
  .snode.current .slabel{font-size:.78rem}
  .snode::before{top:16px}
  .sincerity-bar{font-size:.78rem;padding:7px 12px}
  #stepWrap{padding:28px 16px 80px}
}

.nav nav{display:flex;gap:20px;margin-left:auto}
.nav nav a{color:var(--ink-soft);text-decoration:none;font-size:.92rem}
.nav nav a:hover{color:var(--terra)}
.nav-cta{
  background:var(--ink);color:var(--paper);border:0;border-radius:999px;
  padding:9px 18px;font-size:.88rem;cursor:pointer;font-family:inherit;
}
.nav-cta:hover{background:var(--terra)}

/* hero */
.hero{text-align:center;padding:80px 22px 60px}
.kicker{letter-spacing:.22em;font-size:.78rem;color:var(--gold);margin-bottom:20px}
.hero h1{font-size:clamp(2.4rem,7vw,4.2rem);font-weight:900;line-height:1.25}
.lead{margin:26px auto 0;max-width:660px;color:var(--ink-soft);font-size:1.05rem}
.hero-actions{margin-top:38px;display:flex;flex-direction:column;align-items:center;gap:12px}
.hero-note{font-size:.84rem;color:var(--ink-soft)}
.streak-strip{margin-top:30px;font-size:.9rem;color:var(--ink-soft);min-height:24px}
.streak-strip b{color:var(--terra)}

/* buttons */
.btn-primary{
  background:var(--terra);color:#fff;border:0;border-radius:999px;
  padding:14px 30px;font-size:1rem;font-weight:500;cursor:pointer;
  font-family:inherit;transition:.2s;
}
.btn-primary:hover{background:var(--terra-d);transform:translateY(-1px)}
.btn-primary:disabled{opacity:.55;cursor:wait;transform:none}
.btn-ghost{
  background:transparent;border:1px solid var(--line);border-radius:999px;
  padding:13px 24px;font-size:.95rem;cursor:pointer;color:var(--ink);font-family:inherit;
}
.btn-ghost:hover{border-color:var(--terra);color:var(--terra)}

/* blocks */
.block{padding:72px 22px}
.block.alt{background:var(--paper2)}
.block-head{max-width:720px;margin:0 auto 36px;text-align:center}
.idx{display:block;color:var(--gold);font-size:1.1rem;letter-spacing:.2em;margin-bottom:10px}
.block-head h2{font-size:clamp(1.7rem,4vw,2.4rem);font-weight:700}
.block-head p{margin-top:14px;color:var(--ink-soft)}

.card{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:30px;box-shadow:0 8px 30px rgba(80,60,30,.05);max-width:820px;margin:0 auto;
}
.card h3{font-size:1.15rem;margin-bottom:14px}
.form-card label{display:block;font-size:.9rem;color:var(--ink-soft);margin-bottom:18px}
label{display:block;font-size:.9rem;color:var(--ink-soft)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
input,textarea{
  width:100%;margin-top:7px;padding:12px 14px;border:1px solid var(--line);
  border-radius:10px;font-family:inherit;font-size:.98rem;background:var(--paper);
  color:var(--ink);resize:vertical;
}
input:focus,textarea:focus{outline:none;border-color:var(--terra);background:#fff}

/* writing desk */
.desk-bar{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px;font-size:.85rem}
.desk-bar #wc{font-weight:700;color:var(--terra);font-size:1rem}
.dim{color:var(--ink-soft);opacity:.8;font-size:.82rem}
.manuscript{
  min-height:300px;font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;font-size:1.05rem;
  line-height:2.1;background:#fffdf8;
}
.desk-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
.recover{
  margin-top:12px;padding:11px 14px;background:#fff;border:1px solid var(--gold);
  border-left:4px solid var(--gold);border-radius:10px;font-size:.9rem;color:var(--ink)
}
.recover a{color:var(--terra);font-weight:700}
.data-safe{
  margin-top:20px;padding:16px 18px;background:var(--paper);
  border:1px dashed var(--line);border-radius:12px;font-size:.88rem;color:var(--ink-soft)
}
.data-safe p{margin-bottom:8px;color:var(--ink)}
.data-safe ul{margin:0 0 12px 18px}
.data-safe li{margin:5px 0}
.data-safe b{color:var(--terra)}
.safe-actions{display:flex;gap:10px;flex-wrap:wrap}
.safe-actions .btn-ghost{padding:9px 16px;font-size:.85rem}

/* 成书弹窗 */
.book-modal{
  position:fixed;inset:0;z-index:80;background:rgba(26,23,20,.55);
  display:flex;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(3px)
}
.book-dialog{
  background:#fff;border-radius:18px;max-width:520px;width:100%;max-height:90vh;overflow-y:auto;
  padding:28px;box-shadow:0 24px 60px rgba(0,0,0,.3)
}
.book-dialog h3{font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;font-size:1.3rem;margin-bottom:6px}
.book-dialog label{display:block;font-size:.9rem;color:var(--ink-soft);margin-top:16px}
.book-dialog label.ck{display:flex;align-items:center;gap:8px;margin-top:18px;color:var(--ink)}
.book-dialog label.ck input{width:auto;margin:0}
.tipbox{
  margin-top:16px;background:var(--paper);border:1px dashed var(--line);border-radius:10px;
  padding:12px 14px;font-size:.84rem;color:var(--ink-soft);line-height:1.8
}
.tipbox code{background:#fff;border:1px solid var(--line);border-radius:5px;padding:1px 6px;color:var(--terra);font-size:.82rem}
.bm-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.bm-actions .btn-ghost{padding:12px 18px}

/* ai output */
.ai-out{margin-top:22px;display:none}
.ai-out.show{display:block}
.ai-card{
  background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--terra);
  border-radius:12px;padding:22px;
}
.ai-card h4{font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;color:var(--terra);margin:18px 0 6px;font-size:1rem}
.ai-card h4:first-child{margin-top:0}
.ai-card p{margin:8px 0;white-space:pre-wrap}
.ai-card ul{margin:8px 0 8px 20px}
.ai-card li{margin:5px 0}
/* 起步规划：自我修改 / 重改 */
.plan-tools{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-start;margin-top:20px;
  border-top:1px dashed var(--line);padding-top:16px}
.btn-ghost.mini{padding:6px 12px;font-size:.82rem;margin-top:6px}
.refine{flex:1;min-width:240px}
.refine summary{cursor:pointer;color:var(--terra);font-size:.9rem;padding:8px 0}
.refine textarea{margin:8px 0}
.plan-edit input,.plan-edit textarea{width:100%;margin:4px 0 6px}
.ol-row,.wk-row{display:flex;gap:8px;align-items:center;margin:6px 0}
.ol-row .ol-in{flex:1;margin:0}
.ol-del{background:var(--paper2);border:1px solid var(--line);color:var(--ink-soft);
  border-radius:8px;width:34px;height:38px;cursor:pointer;flex:0 0 auto}
.ol-del:hover{border-color:var(--terra);color:var(--terra)}
.wk-row label{flex:0 0 56px;color:var(--terra);font-size:.85rem}
.wk-row .wk-task{flex:1;margin:0}
.wk-row .wk-min{flex:0 0 76px;margin:0}
.spinner{display:flex;align-items:center;gap:10px;color:var(--ink-soft);font-size:.92rem}
.spinner i{width:16px;height:16px;border:2px solid var(--line);border-top-color:var(--terra);border-radius:50%;display:inline-block;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.encourage{font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;font-size:1.15rem;color:var(--ink);font-weight:500}
.identity{margin-top:18px;padding:14px 16px;background:#fff;border-radius:10px;border:1px dashed var(--gold);color:var(--terra);font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif}
.micro{margin-top:16px;background:var(--terra);color:#fff;padding:16px 18px;border-radius:12px;font-weight:500}
.micro small{display:block;opacity:.85;font-weight:400;margin-bottom:4px;font-size:.78rem;letter-spacing:.1em}
.week{list-style:none;margin:10px 0 0!important}
.week li{display:flex;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line)}
.week b{min-width:54px;color:var(--terra)}
.week em{margin-left:auto;color:var(--ink-soft);font-size:.85rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 14px;font-size:.85rem}
.plat{border:1px solid var(--line);border-radius:10px;margin:10px 0;background:#fff}
.plat summary{padding:13px 16px;cursor:pointer;font-weight:500}
.plat[open] summary{color:var(--terra)}
.plat .pin{padding:0 16px 16px;color:var(--ink-soft);font-size:.95rem}
.plat .pin .tip{margin-top:8px;color:var(--terra)}

/* roadmap */
.roadmap{list-style:none;display:flex;gap:6px;overflow-x:auto;padding:10px 0;counter-reset:r}
.roadmap li{
  flex:1;min-width:118px;text-align:center;padding:18px 10px;border-radius:12px;
  background:#fff;border:1px solid var(--line);position:relative;
}
.roadmap li::before{
  counter-increment:r;content:counter(r);display:grid;place-items:center;
  width:28px;height:28px;margin:0 auto 8px;border-radius:50%;
  background:var(--paper2);color:var(--ink-soft);font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;font-size:.85rem;
}
.roadmap li b{display:block;font-size:.98rem}
.roadmap li span{font-size:.78rem;color:var(--ink-soft)}
.roadmap li.done{border-color:var(--gold)}
.roadmap li.done::before{background:var(--gold);color:#fff}
.roadmap li.now{border-color:var(--terra);box-shadow:0 6px 20px rgba(181,83,47,.18)}
.roadmap li.now::before{background:var(--terra);color:#fff}

/* checklist */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:820px;margin:30px auto 0}
.two-col .card{max-width:none}
.check{list-style:none}
.check li{display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:.93rem;cursor:pointer}
.check input{width:auto;margin:5px 0 0}
.check li.on{color:var(--ink-soft);text-decoration:line-through}
.check-progress{height:8px;background:var(--paper2);border-radius:999px;margin-top:16px;overflow:hidden}
.check-progress div{height:100%;width:0;background:var(--ok);transition:.4s}
.check-msg{margin-top:10px;font-size:.9rem;color:var(--ok);min-height:20px}
.prep{margin-left:18px}
.prep li{margin:9px 0;font-size:.92rem}

/* chat */
.chat-fab{
  position:fixed;right:22px;bottom:calc(22px + env(safe-area-inset-bottom));z-index:60;background:var(--ink);color:var(--paper);
  border:0;border-radius:999px;padding:14px 22px;font-family:inherit;cursor:pointer;
  box-shadow:0 10px 30px rgba(0,0,0,.18);font-size:.92rem;
}
.chat-fab:hover{background:var(--terra)}
.backup-fab{
  position:fixed;right:22px;bottom:calc(78px + env(safe-area-inset-bottom));z-index:59;
  background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:999px;
  padding:11px 18px;font-family:inherit;cursor:pointer;font-size:.86rem;
  box-shadow:0 8px 24px rgba(0,0,0,.14);
}
.backup-fab:hover{border-color:var(--terra);color:var(--terra)}
@media(max-width:720px){.backup-fab{right:16px;bottom:calc(72px + env(safe-area-inset-bottom));padding:9px 14px;font-size:.8rem}}
.chat-panel{
  position:fixed;right:22px;bottom:calc(78px + env(safe-area-inset-bottom));z-index:60;width:min(380px,92vw);
  background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.22);display:flex;flex-direction:column;max-height:70vh;
}
.chat-head{background:var(--ink);color:var(--paper);padding:13px 16px;font-weight:500;display:flex;justify-content:space-between;align-items:center}
.chat-head button{background:none;border:0;color:var(--paper);font-size:1.3rem;cursor:pointer;line-height:1}
.chat-body{padding:16px;overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:10px;background:var(--paper)}
.msg{padding:10px 14px;border-radius:12px;font-size:.93rem;max-width:85%;white-space:pre-wrap}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:3px}
.msg.user{background:var(--terra);color:#fff;align-self:flex-end;border-bottom-right-radius:3px}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
.chat-input input{margin:0}
.chat-input button{background:var(--terra);color:#fff;border:0;border-radius:10px;padding:0 18px;cursor:pointer;font-family:inherit}

/* PWA install */
.install-fab{
  position:fixed;left:22px;bottom:calc(22px + env(safe-area-inset-bottom));z-index:60;
  background:var(--terra);color:#fff;border:0;border-radius:999px;
  padding:13px 20px;font-family:inherit;font-size:.9rem;cursor:pointer;
  box-shadow:0 10px 30px rgba(181,83,47,.3);animation:rise .4s ease;
}
.install-fab:hover{background:var(--terra-d)}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.ios-tip{
  position:fixed;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:61;
  width:min(440px,92vw);background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;font-size:.92rem;color:var(--ink);
  box-shadow:0 16px 40px rgba(0,0,0,.18);text-align:center;
}
.ios-tip b{color:var(--terra)}
.ios-tip button{
  display:block;margin:12px auto 0;background:var(--ink);color:var(--paper);
  border:0;border-radius:999px;padding:8px 22px;font-family:inherit;cursor:pointer;
}
@media(max-width:720px){.install-fab{left:16px;bottom:16px;padding:11px 16px;font-size:.85rem}}

footer{text-align:center;padding:50px 22px;color:var(--ink-soft);border-top:1px solid var(--line);font-size:.9rem}
footer p{margin:4px 0}
.contact{color:var(--terra);font-weight:700;text-decoration:none;border-bottom:1px solid var(--terra)}
.contact:hover{color:var(--terra-d)}
footer .dim{margin-top:6px}

@media(max-width:720px){
  .nav nav{display:none}
  .grid2,.two-col{grid-template-columns:1fr}
  .hero{padding:56px 20px 40px}
}