/* huxeva.com — 站內唯一樣式表 */

@font-face{font-family:Manrope;font-style:normal;font-display:swap;font-weight:400;src:url(../assets/manrope-latin-400-normal-PaqtzbVb.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Manrope;font-style:normal;font-display:swap;font-weight:500;src:url(../assets/manrope-latin-500-normal-BYYD-dBL.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Manrope;font-style:normal;font-display:swap;font-weight:600;src:url(../assets/manrope-latin-600-normal-4f0koTD-.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:500;src:url(../assets/ibm-plex-mono-latin-500-normal-DSY6xOcd.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --ink:#10211d;
  --pine:#0b4f43;
  --pine-strong:#073a32;
  --moss:#587267;
  --mist:#edf3f0;
  --paper:#f7faf8;
  --line:#d4e0db;
  --muted:#5d6d68;
  --white:#fff;
  --clay:#8a3a24;
  --clay-soft:#fbf1ed;
  --radius-sm:12px;
  --radius-md:18px;
  --radius-lg:26px;
  --container:1360px;
  --shadow-focus:0 0 0 4px rgba(11,79,67,.16);
  --han:"Manrope","PingFang TC","Noto Sans TC","Microsoft JhengHei","Hiragino Sans TC",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html{color-scheme:light;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);font-family:var(--han);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{color:inherit}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
p,h1,h2,h3,h4{margin-top:0}
hr{border:0;border-top:1px solid var(--line);margin:34px 0}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--pine);outline-offset:3px;box-shadow:var(--shadow-focus)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;z-index:100;top:10px;inset-inline-start:10px;padding:10px 14px;background:var(--white);border:1px solid var(--pine);border-radius:8px;transform:translateY(-200%)}
.skip-link:focus{transform:translateY(0)}

.app-shell{width:min(100%,calc(var(--container) + 48px));margin:0 auto;padding:18px 24px 30px}

/* ---------- header ---------- */
.site-header{position:sticky;z-index:30;top:12px;display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:18px;min-height:64px;padding:0 26px;margin-bottom:18px;background:#eaf1ee;border:1px solid #e0e9e5;border-radius:var(--radius-md)}
.brand{display:grid;gap:1px;justify-self:start}
.brand b{font-size:19px;font-weight:600;letter-spacing:.2em}
.brand span{color:var(--muted);font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase}
.desktop-nav{display:flex;align-self:stretch;align-items:center;gap:30px}
.desktop-nav a{position:relative;display:grid;height:100%;place-items:center;color:var(--muted);font-size:15px;font-weight:500;white-space:nowrap}
.desktop-nav a::after{position:absolute;bottom:14px;inset-inline-start:0;width:100%;height:2px;background:var(--pine);content:"";opacity:0;transform:scaleX(.4);transition:opacity 160ms ease,transform 160ms ease}
.desktop-nav a:hover,.desktop-nav a.active{color:var(--ink)}
.desktop-nav a.active::after{opacity:1;transform:scaleX(1)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:500px;overflow:hidden;background:var(--pine-strong);border-radius:var(--radius-sm)}
.hero>img{width:100%;height:500px;object-fit:cover;object-position:center 54%}
.hero-panel{position:absolute;bottom:0;inset-inline-start:18px;width:min(52%,600px);padding:40px 48px 34px;background:#f2f7f4;border-radius:var(--radius-md) var(--radius-md) 0 0}
.eyebrow{margin-bottom:12px;color:var(--pine);font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.eyebrow.inverse{color:#b9d2ca}
.hero-panel h1{max-width:15em;margin-bottom:14px;font-size:clamp(32px,3.6vw,46px);font-weight:600;line-height:1.16;letter-spacing:-.02em}
.hero-lede{margin-bottom:24px;color:var(--muted);font-size:16px;line-height:1.65}

.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:14px;min-height:50px;padding:0 22px;background:var(--pine);color:var(--white);border:1px solid var(--pine);border-radius:7px;font-size:15px;font-weight:600;transition:background-color 160ms ease,border-color 160ms ease,transform 160ms ease}
.primary-button:hover,.secondary-button:hover{background:var(--pine-strong);border-color:var(--pine-strong);transform:translateY(-1px)}
.secondary-button{background:transparent;color:var(--pine);border-color:var(--line)}
.secondary-button:hover{background:var(--pine);color:var(--white)}

/* ---------- 邀請碼區（首頁首屏） ---------- */
.invite-card{position:absolute;bottom:0;inset-inline-end:0;width:min(40%,372px);padding:26px 28px 22px;background:#12342d;color:#e7efec;border-radius:var(--radius-md) 0 0 0}
.invite-card .eyebrow{color:#9dc0b6}
.invite-row{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.invite-code{flex:1;padding:11px 14px;background:rgba(255,255,255,.08);border:1px dashed #4c7a6e;border-radius:8px;color:var(--white);font-family:var(--mono);font-size:22px;letter-spacing:.16em}
.copy-btn{min-width:74px;min-height:46px;padding:0 14px;background:#e7efec;color:#0b3129;border:0;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:background-color 160ms ease}
.copy-btn:hover{background:var(--white)}
.copy-btn[data-copied="1"]{background:#b9d9cc}
.invite-note{margin-bottom:6px;font-size:14px;line-height:1.6}
.invite-foot{margin:0;color:#a9c9bf;font-size:12.5px;line-height:1.55}

/* ---------- 首頁卡片區 ---------- */
.research-grid{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(268px,.86fr);gap:16px;margin-top:16px}
.feature-card,.article-card,.source-map-card{position:relative;display:block;overflow:hidden;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm)}
.feature-card{min-height:318px}
.feature-card img{width:100%;height:318px;object-fit:cover;transition:transform 420ms ease}
.feature-card:hover img{transform:scale(1.015)}
.feature-caption{position:absolute;bottom:0;inset-inline-start:0;width:min(84%,560px);padding:24px 28px 22px;background:#12342d;color:var(--white);border-radius:0 var(--radius-md) 0 0}
.feature-caption h2{margin-bottom:8px;font-size:23px;font-weight:600;line-height:1.3;letter-spacing:-.01em}
.feature-caption p{margin-bottom:0;color:#cedbd6;font-size:14px;line-height:1.6}
.article-stack{display:grid;gap:16px}
.article-card{min-height:151px;padding:22px 50px 20px 24px;transition:background-color 160ms ease,border-color 160ms ease}
.article-card:hover{background:#e4eee9;border-color:#c6d8d0}
.article-card h3{margin-bottom:7px;font-size:19px;font-weight:600;line-height:1.34}
.article-card p{margin-bottom:0;color:var(--muted);font-size:14px;line-height:1.6}
.card-arrow{position:absolute;inset-inline-end:20px;bottom:20px;color:var(--pine)}

.source-map-card{isolation:isolate;min-height:250px;padding:32px 34px;margin-top:16px;background:var(--mist)}
.source-map-card>img{position:absolute;z-index:0;inset:0;width:100%;height:100%;object-fit:cover;object-position:right center;opacity:.55}
.source-map-card::after{position:absolute;z-index:0;inset:0;content:"";background:linear-gradient(100deg,var(--mist) 30%,rgba(237,243,240,.35) 72%)}
.source-map-card>div{position:relative;z-index:1;max-width:460px}
.source-map-card h2{margin-bottom:8px;font-size:22px;font-weight:600}
.source-map-card p{margin-bottom:18px;color:var(--muted);font-size:15px;line-height:1.65}

/* ---------- 通用區塊頭 ---------- */
.band{margin-top:34px}
.band-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.band-head h2{margin-bottom:0;font-size:25px;font-weight:600;letter-spacing:-.01em}
.band-head p{margin:0;color:var(--muted);font-size:14px}
.band-note{margin:14px 0 0;color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- 索引列（首頁寬內鏈 / 列表頁） ---------- */
.index-list{display:grid;border-top:1px solid var(--line);margin-top:0}
.index-row{display:grid;grid-template-columns:64px minmax(0,1fr) 148px;align-items:baseline;gap:20px;padding:20px 6px;border-bottom:1px solid var(--line);transition:background-color 140ms ease}
.index-row:hover{background:var(--mist)}
.index-num{color:var(--pine);font-family:var(--mono);font-size:15px}
.index-row h3{margin-bottom:6px;font-size:19px;font-weight:600;line-height:1.38}
.index-row p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.65}
.index-tag{justify-self:end;color:var(--moss);font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;text-align:right}

.link-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 28px;margin-top:18px}
.link-columns a{display:block;padding:7px 0;color:var(--muted);font-size:14.5px;border-bottom:1px solid transparent}
.link-columns a:hover{color:var(--pine);border-bottom-color:var(--line)}

/* ---------- 內頁頭 ---------- */
.page-intro{display:grid;align-content:end;min-height:280px;padding:44px 5% 40px;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-lg)}
.page-intro h1{max-width:18em;margin-bottom:16px;font-size:clamp(30px,4.4vw,52px);font-weight:600;line-height:1.14;letter-spacing:-.025em}
.page-intro>p:last-child{max-width:44em;margin-bottom:0;color:var(--muted);font-size:16.5px;line-height:1.7}

.crumbs{display:flex;flex-wrap:wrap;gap:8px;padding:4px 2px 14px;color:var(--muted);font-size:13px}
.crumbs a:hover{color:var(--pine)}
.crumbs span[aria-hidden]{color:var(--line)}

/* ---------- 文章 ---------- */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:44px;margin-top:22px}
.article-head{padding-bottom:22px;margin-bottom:26px;border-bottom:1px solid var(--line)}
.article-head h1{max-width:20em;margin-bottom:14px;font-size:clamp(28px,3.4vw,42px);font-weight:600;line-height:1.2;letter-spacing:-.02em}
.article-deck{max-width:38em;margin-bottom:18px;color:var(--muted);font-size:17px;line-height:1.72}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:#587267;font-family:var(--mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase}
.article-cover{margin:0 0 30px}
.article-cover img{width:100%;border-radius:var(--radius-sm)}
.article-cover figcaption{padding-top:9px;color:var(--muted);font-size:13px;line-height:1.6}

.toc{padding:20px 24px;margin-bottom:32px;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm)}
.toc strong{display:block;margin-bottom:10px;color:var(--pine);font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.toc ol{display:grid;gap:7px;padding:0;margin:0;list-style:none;counter-reset:toc}
.toc li{counter-increment:toc;font-size:15px;line-height:1.5}
.toc li::before{content:counter(toc,decimal-leading-zero) " ";color:var(--moss);font-family:var(--mono);font-size:12px}
.toc a:hover{color:var(--pine);text-decoration:underline;text-underline-offset:3px}

.prose{max-width:41em;font-size:17.5px;line-height:1.86}
.prose h2{margin:52px 0 16px;padding-top:6px;font-size:26px;font-weight:600;line-height:1.34;letter-spacing:-.015em;scroll-margin-top:92px}
.prose h2:first-child{margin-top:0}
.prose h3{margin:34px 0 12px;font-size:20px;font-weight:600;line-height:1.42;scroll-margin-top:92px}
.prose p{margin-bottom:19px}
.prose ul,.prose ol{padding-inline-start:1.35em;margin:0 0 20px}
.prose li{margin-bottom:9px}
.prose li>ul,.prose li>ol{margin-top:9px}
.prose a{color:var(--pine);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose a:hover{background:#dfeae5}
.prose strong{font-weight:600}
.prose code{padding:1px 6px;background:var(--mist);border-radius:5px;font-family:var(--mono);font-size:.88em}
.prose figure{margin:28px 0}
.prose figure img{width:100%;border:1px solid var(--line);border-radius:var(--radius-sm)}
.prose figcaption{padding-top:9px;color:var(--muted);font-size:13.5px;line-height:1.6}

.lead-answer{padding:18px 22px;margin:0 0 26px;background:var(--mist);border-inline-start:3px solid var(--pine);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:17px;line-height:1.78}
.lead-answer p:last-child{margin-bottom:0}
.callout{padding:20px 24px;margin:28px 0;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm)}
.callout>strong{display:block;margin-bottom:8px;font-size:16px}
.callout p:last-child,.callout ul:last-child,.callout ol:last-child{margin-bottom:0}
.warn{padding:20px 24px;margin:28px 0;background:var(--clay-soft);border:1px solid #ecd6cd;border-radius:var(--radius-sm)}
.warn>strong{display:block;margin-bottom:8px;color:var(--clay);font-size:16px}
.warn p:last-child,.warn ul:last-child{margin-bottom:0}

.table-wrap{overflow-x:auto;margin:26px 0;border:1px solid var(--line);border-radius:var(--radius-sm)}
table{width:100%;border-collapse:collapse;font-size:15px}
thead th{padding:12px 14px;background:var(--mist);color:var(--ink);font-weight:600;text-align:start;white-space:nowrap;border-bottom:1px solid var(--line)}
tbody td{padding:12px 14px;line-height:1.65;vertical-align:top;border-bottom:1px solid var(--line)}
tbody tr:last-child td{border-bottom:0}
tbody th{padding:12px 14px;font-weight:600;text-align:start;vertical-align:top;border-bottom:1px solid var(--line);white-space:nowrap}
tbody td a{color:var(--pine);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
tbody td a:hover{background:#dfeae5}

.qa{margin-top:52px;padding-top:30px;border-top:1px solid var(--line)}
.qa h2{margin:0 0 20px;font-size:24px;font-weight:600}
.qa-item{padding:18px 0;border-bottom:1px solid var(--line)}
.qa-item:last-child{border-bottom:0}
.qa-item h3{margin:0 0 9px;font-size:17.5px;font-weight:600;line-height:1.5}
.qa-item p{margin:0 0 12px;color:var(--muted);font-size:16px;line-height:1.78}
.qa-item p:last-child{margin-bottom:0}

/* ---------- 側欄 ---------- */
.aside{align-self:start;position:sticky;top:92px;display:grid;gap:16px}
.aside-box{padding:20px 22px;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm)}
.aside-box strong{display:block;margin-bottom:10px;color:var(--pine);font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.aside-box p{margin:0 0 12px;color:var(--muted);font-size:14.5px;line-height:1.7}
.aside-box p:last-child{margin-bottom:0}
.aside-links{display:grid;gap:10px;padding:0;margin:0;list-style:none}
.aside-links li{font-size:14.5px;line-height:1.5}
.aside-links a{border-bottom:1px solid transparent}
.aside-links a:hover{color:var(--pine);border-bottom-color:var(--line)}
.aside-code{display:flex;align-items:center;gap:9px;margin-bottom:10px}
.aside-code code{flex:1;padding:9px 12px;background:var(--white);border:1px dashed #b5cbc3;border-radius:7px;font-family:var(--mono);font-size:18px;letter-spacing:.14em;color:var(--pine-strong)}
.aside-code .copy-btn{min-width:64px;min-height:42px;background:var(--pine);color:var(--white)}
.aside-code .copy-btn:hover{background:var(--pine-strong)}

.related{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.related strong{display:block;margin-bottom:14px;color:var(--pine);font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.related-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(232px,1fr));gap:14px;padding:0;margin:0;list-style:none}
.related-list a{display:block;height:100%;padding:16px 18px;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm);font-size:15.5px;font-weight:500;line-height:1.5;transition:background-color 150ms ease}
.related-list a:hover{background:#e0ebe6}
.related-list span{display:block;margin-top:6px;color:var(--muted);font-size:13.5px;font-weight:400;line-height:1.6}

.disclosure-inline{padding:14px 18px;margin:26px 0;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm);color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- 工具頁 ---------- */
.tool-panel{padding:30px 32px;margin:26px 0 0;background:#12342d;color:#dfeae5;border-radius:var(--radius-md)}
.tool-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(196px,1fr));gap:16px 20px;margin-bottom:26px}
.tool-field{display:grid;gap:7px}
.tool-field label{color:#9dc0b6;font-family:var(--mono);font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.tool-field input,.tool-field select{width:100%;min-height:48px;padding:0 13px;background:rgba(255,255,255,.07);border:1px solid #3f6e62;border-radius:8px;color:var(--white)}
.tool-field select option{color:var(--ink)}
.tool-field small{color:#89aea4;font-size:12.5px;line-height:1.5}
.tool-result{display:grid;grid-template-columns:repeat(auto-fit,minmax(168px,1fr));gap:18px;padding-top:24px;border-top:1px solid #2c5148}
.result-cell span{display:block;margin-bottom:5px;color:#9dc0b6;font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase}
.result-cell b{font-size:31px;font-weight:600;letter-spacing:-.02em;line-height:1.2}
.result-cell b.sm{font-size:22px}
.result-cell em{display:block;margin-top:5px;color:#89aea4;font-size:12.5px;font-style:normal;line-height:1.5}
.tool-source{margin:14px 0 0;color:var(--muted);font-size:13px;line-height:1.7}
/* 深色面板裡嵌的淺色區塊要把文字色搶回來，否則淺底淺字看不見 */
.tool-panel .warn,.tool-panel .callout{color:var(--ink)}
.tool-panel .warn p,.tool-panel .callout p,.tool-panel .warn li,.tool-panel .callout li{color:var(--ink)}
.tool-panel .callout>strong{color:var(--ink)}
.tool-panel .warn>strong{color:var(--clay)}
.tool-panel .warn a,.tool-panel .callout a{color:var(--pine);text-decoration:underline;text-underline-offset:3px}

.checklist{display:grid;gap:0;margin:26px 0 0;padding:0;list-style:none;border-top:1px solid var(--line)}
.checklist li{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:start;gap:14px;padding:16px 4px;border-bottom:1px solid var(--line)}
.checklist .q-num{color:var(--pine);font-family:var(--mono);font-size:13px;padding-top:3px}
.checklist p{margin:5px 0 0;color:var(--muted);font-size:14px;line-height:1.65}
.checklist strong{font-size:16px;font-weight:600;line-height:1.5}
.choice{display:flex;gap:7px}
.choice button{min-width:52px;min-height:44px;padding:0 12px;background:var(--white);border:1px solid var(--line);border-radius:7px;font-size:14px;cursor:pointer;transition:background-color 140ms ease,border-color 140ms ease}
.choice button:hover{border-color:var(--pine)}
.choice button[aria-pressed="true"]{background:var(--pine);border-color:var(--pine);color:var(--white)}

.filter-bar{display:flex;flex-wrap:wrap;gap:9px;margin:24px 0 4px}
.filter-bar button{min-height:44px;padding:0 17px;background:transparent;border:1px solid var(--line);border-radius:999px;line-height:1.5;font-size:14.5px;cursor:pointer;transition:background-color 140ms ease,border-color 140ms ease}
.filter-bar button:hover{border-color:var(--pine)}
.filter-bar button[aria-pressed="true"]{background:var(--pine);border-color:var(--pine);color:var(--white)}
.row-hidden{display:none}

.tool-guide{margin-top:34px;padding:0;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm)}
.tool-guide>summary{padding:18px 24px;font-size:16.5px;font-weight:600;cursor:pointer;list-style:none}
.tool-guide>summary::-webkit-details-marker{display:none}
.tool-guide>summary::after{content:"＋";float:right;color:var(--pine);font-family:var(--mono)}
.tool-guide[open]>summary::after{content:"－"}
.tool-guide-body{padding:0 24px 24px;max-width:44em}
.tool-guide-body h3{margin:22px 0 9px;font-size:17px;font-weight:600}
.tool-guide-body p,.tool-guide-body li{color:var(--muted);font-size:15px;line-height:1.78}
.tool-guide-body p{margin:0 0 14px}
.tool-guide-body ul{padding-inline-start:1.2em;margin:0 0 14px}
.tool-guide-body a{color:var(--pine);text-decoration:underline;text-underline-offset:3px}

/* ---------- 合規頁 / 一般內頁 ---------- */
.doc{max-width:42em;margin-top:30px;font-size:17px;line-height:1.85}
.doc h2{margin:44px 0 14px;font-size:23px;font-weight:600}
.doc h3{margin:28px 0 10px;font-size:18px;font-weight:600}
.doc p{margin-bottom:18px}
.doc ul,.doc ol{padding-inline-start:1.35em;margin:0 0 20px}
.doc li{margin-bottom:9px}
.doc a{color:var(--pine);text-decoration:underline;text-underline-offset:3px}
.doc dl{margin:0 0 22px}
.doc dt{margin-top:16px;font-weight:600}
.doc dd{margin:5px 0 0;color:var(--muted)}

.method-strip{display:grid;grid-template-columns:minmax(150px,.5fr) minmax(0,1.5fr);align-items:center;gap:28px;padding:36px 5%;margin-top:34px;background:var(--pine);color:var(--white);border-radius:var(--radius-md)}
.method-strip .eyebrow{margin-bottom:0;color:#b9d2ca}
.method-strip h2{margin-bottom:8px;font-size:25px;font-weight:600}
.method-strip p{margin-bottom:0;color:#c7d7d2;font-size:15.5px;line-height:1.7}

.principle-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.principle-grid article{padding:26px;background:var(--mist);border:1px solid #e1e9e5;border-radius:var(--radius-sm)}
.principle-grid span{color:var(--pine);font-family:var(--mono);font-size:13px}
.principle-grid h3{margin:26px 0 9px;font-size:20px;font-weight:600;line-height:1.4}
.principle-grid p{margin:0;color:var(--muted);font-size:15px;line-height:1.7}

.empty-note{display:grid;min-height:130px;padding:24px;place-items:center;gap:7px;background:var(--mist);border:1px dashed var(--line);border-radius:10px;color:var(--muted);text-align:center}

/* ---------- footer ---------- */
.site-footer{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) minmax(0,1fr);gap:30px;padding:36px 8px 14px;margin-top:44px;border-top:1px solid var(--line);color:var(--muted);font-size:13.5px;line-height:1.75}
.site-footer h2{margin:0 0 12px;color:var(--moss);font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase}
.site-footer b{display:block;margin-bottom:8px;color:var(--ink);font-size:17px;letter-spacing:.18em}
.site-footer p{margin:0 0 10px}
.site-footer nav{display:grid;gap:8px}
.site-footer a{border-bottom:1px solid transparent}
.site-footer a:hover{color:var(--pine);border-bottom-color:var(--line)}
.footer-legal{grid-column:1/-1;padding-top:18px;margin-top:6px;border-top:1px solid var(--line);font-size:12.5px}
.footer-legal p{margin:0 0 7px}

/* ---------- 響應式 ---------- */
@media (max-width:1040px){
  .article-wrap{grid-template-columns:minmax(0,1fr);gap:34px}
  .aside{position:static;grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
  .research-grid{grid-template-columns:1fr}
  .hero-panel{width:min(62%,560px)}
  .invite-card{width:min(46%,340px)}
  .link-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .principle-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:780px){
  body{font-size:16.5px}
  html{scroll-behavior:auto}
  .app-shell{padding:12px 14px 24px}
  .site-header{top:8px;grid-template-columns:1fr auto;gap:0 12px;padding:10px 16px 0;border-radius:14px}
  .brand{grid-area:1 / 1}
  .lang-switch{grid-area:1 / 2}
  .lang-switch>summary{padding:7px 10px}
  .desktop-nav{grid-area:2 / 1 / 3 / 3;gap:20px;margin:0 -16px;padding:2px 16px 0;overflow-x:auto;scrollbar-width:none}
  .desktop-nav::-webkit-scrollbar{display:none}
  .desktop-nav a{height:auto;padding:12px 0;font-size:15px}
  .desktop-nav a::after{bottom:4px}

  .hero{display:flex;flex-direction:column;min-height:0;background:var(--mist);border:1px solid var(--line)}
  .hero>img{order:2;height:132px}
  .hero-panel{position:static;order:1;width:auto;padding:22px 20px 18px;background:transparent;border-radius:0}
  .hero-panel h1{font-size:clamp(26px,7vw,32px)}
  .hero-lede{margin-bottom:16px;font-size:15.5px}
  .invite-card{position:static;order:3;width:auto;padding:20px 20px 18px;border-radius:0}
  .invite-code{font-size:20px}

  .feature-card,.feature-card img{min-height:0;height:auto}
  .feature-card img{height:210px}
  .feature-caption{position:static;width:auto;border-radius:0}
  .article-card{min-height:0;padding:20px 22px}
  .card-arrow{display:none}
  .source-map-card{padding:22px}

  .index-row{grid-template-columns:34px minmax(0,1fr);gap:6px 12px;padding:18px 2px}
  .index-tag{grid-column:2;justify-self:start;text-align:start}
  .link-columns{grid-template-columns:1fr}
  .page-intro{min-height:0;padding:30px 20px 28px;border-radius:16px}
  .prose{font-size:17px;line-height:1.84}
  .prose h2{margin:40px 0 14px;font-size:22px}
  .prose h3{font-size:18.5px}
  .tool-panel{padding:22px 18px}
  .checklist li{grid-template-columns:26px minmax(0,1fr);gap:5px 10px}
  .choice{grid-column:2}
  .method-strip{grid-template-columns:1fr;gap:14px;padding:28px 22px}
  .principle-grid{grid-template-columns:1fr}
  .site-footer{grid-template-columns:1fr;gap:24px}
  table{font-size:14.5px}
  thead th,tbody td,tbody th{padding:10px 12px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto !important;transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ---------- 正文內的推廣連結（只在轉化頁出現） ---------- */
.ref-line{margin:24px 0 10px;padding:18px 20px;background:var(--clay-soft);border-inline-start:3px solid var(--clay);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:17.5px;line-height:1.85}
.prose .ref-link{color:var(--clay);font-weight:600;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.prose .ref-link:hover{color:#6d2c1a;background:rgba(138,58,36,.08)}
.ref-note{margin:0 0 26px;color:var(--muted);font-size:13.5px;line-height:1.65}


/* ---------- 四層示意帶（首屏正下方） ---------- */
.layers{margin-top:16px;padding:26px 28px 24px;background:var(--pine-strong);border-radius:var(--radius-sm);color:#dce8e3}
.layers>p{margin:0 0 18px;color:#9dc0b6;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.layer-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;padding:0;margin:0;list-style:none;counter-reset:layer}
.layer-steps li{position:relative;padding:16px 18px 15px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:10px}
.layer-steps li+li::before{position:absolute;inset-inline-start:-11px;top:50%;transform:translateY(-50%);color:#6f9b8e;font-size:18px;content:"›"}
.layer-steps b{display:block;margin-bottom:7px;color:#9dc0b6;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.1em}
.layer-steps span{display:block;font-size:17px;line-height:1.45;color:#edf3f0}
.layers>span{display:block;margin-top:16px;color:#8fb3a8;font-size:14px;line-height:1.6}
html:lang(bn) .layer-steps b{letter-spacing:.02em;font-size:12px}
html:lang(bn) .layer-steps span{font-size:15.5px}

/* ---------- evidence strip ---------- */
.evidence{margin-top:26px}
.evidence-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px 18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.evidence-head h2{margin:0;font-size:25px;font-weight:600;letter-spacing:-.01em}
.evidence-head p{margin:0;color:var(--muted);font-size:14px}
.evidence-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:18px}
.doc-card{display:grid;grid-template-rows:auto 1fr;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;transition:border-color 160ms ease,transform 160ms ease}
.doc-card:hover{border-color:var(--pine);transform:translateY(-2px)}
.doc-shot{position:relative;background:var(--mist);border-bottom:1px solid var(--line)}
.doc-shot img{width:100%;height:168px;object-fit:cover;object-position:top center}
.doc-stamp{position:absolute;bottom:9px;inset-inline-end:9px;padding:3px 8px;background:rgba(7,58,50,.9);color:#fff;border-radius:5px;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em}
.doc-body{padding:16px 18px 17px}
.doc-body strong{display:block;margin-bottom:6px;font-size:16.5px;font-weight:600;line-height:1.4}
.doc-body p{margin:0 0 11px;color:var(--muted);font-size:14.5px;line-height:1.66}
.doc-body span{color:var(--pine);font-size:14px;font-weight:500}

/* 基石長文在列表裡的分量 */
.index-row.lead{background:linear-gradient(90deg,var(--mist),transparent 62%)}
.index-row.lead h3{font-size:21px}
.index-row.lead .index-num{color:var(--clay)}

@media (max-width:1040px){
  .evidence-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1040px){
  .layer-steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .layer-steps li+li::before{display:none}
}
@media (max-width:780px){
  .layers{padding:22px 20px 20px}
  .layer-steps{grid-template-columns:1fr}
  .evidence-head h2{font-size:22px}
  .evidence-grid{grid-template-columns:1fr;gap:14px}
  .doc-shot img{height:200px}
  .index-row.lead{background:var(--mist);padding-inline:10px}
  .index-row.lead h3{font-size:19.5px}
}

/* ---------- 語言下拉（原生 details，無 JS 也能用） ---------- */
.lang-switch{position:relative;justify-self:end}
.lang-switch>summary{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;background:#f4f8f6;border:1px solid #cfdcd7;border-radius:7px;color:var(--muted);font-family:var(--mono);font-size:12px;letter-spacing:.06em;white-space:nowrap;cursor:pointer;list-style:none;transition:border-color 160ms ease,color 160ms ease}
.lang-switch>summary::-webkit-details-marker{display:none}
.lang-switch>summary::marker{content:""}
.lang-switch>summary:hover,.lang-switch[open]>summary{border-color:var(--pine);color:var(--pine)}
.lang-switch>summary svg{transition:transform 180ms ease}
.lang-switch[open]>summary svg{transform:rotate(180deg)}
.lang-menu{position:absolute;z-index:40;top:calc(100% + 7px);inset-inline-end:0;min-width:176px;padding:6px;background:var(--white);border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 30px rgba(7,58,50,.16)}
.lang-menu a{display:block;padding:10px 12px;border-radius:7px;color:var(--ink);font-size:14.5px;line-height:1.4;white-space:nowrap}
.lang-menu a:hover{background:var(--mist)}
.lang-menu a[aria-current]{background:var(--mist);color:var(--pine);font-weight:600}

/* ---------- bengali edition (lang=bn) ---------- */
html:lang(bn){
  --han:"Manrope","Noto Sans Bengali","Hind Siliguri","Nirmala UI","Shonar Bangla","Bangla Sangam MN","Kohinoor Bangla",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,"Noto Sans Bengali","Nirmala UI",monospace;
}
html:lang(bn) body{line-height:1.58}
html:lang(bn) .prose p,html:lang(bn) .prose li,html:lang(bn) .callout p,html:lang(bn) .warn p{line-height:1.92}
html:lang(bn) .hero-panel h1{line-height:1.34;letter-spacing:0}
html:lang(bn) .prose h2,html:lang(bn) .prose h3,html:lang(bn) .article-head h1{line-height:1.42;letter-spacing:0}
html:lang(bn) .eyebrow,html:lang(bn) .index-tag,html:lang(bn) .article-meta,html:lang(bn) .site-footer h2,html:lang(bn) .toc strong,html:lang(bn) .aside-box strong,html:lang(bn) .related strong,html:lang(bn) .tool-field label,html:lang(bn) .result-cell span{text-transform:none;letter-spacing:.02em;font-size:12px}
html:lang(bn) .eyebrow,html:lang(bn) .index-tag,html:lang(bn) .site-footer h2,html:lang(bn) .toc strong,html:lang(bn) .aside-box strong,html:lang(bn) .related strong{font-size:13px}
html:lang(bn) .invite-code,html:lang(bn) .aside-code code{letter-spacing:.16em}
html:lang(bn) .index-num{letter-spacing:0}