/* ==========================================================================
   币雨 COINRAYN · 设计系统 — 空投暴雨 / 天降新币接币口
   深青 hero + 冷光亮底正文 · 币安黄/薄荷强调 · Noto Sans SC / Chakra Petch / Fragment Mono
   ========================================================================== */
:root{
  --teal:#0B2E31; --teal2:#0F3B3E; --teal3:#143f43;
  --paper:#F1F5F2; --paper2:#E7EEEA; --card:#FFFFFF;
  --ink:#0B2E31; --ink2:#3a534f; --muted:#6d827d;
  --y:#F0B90B; --y2:#FFD34D; --mint:#22b387; --mint2:#5BE0B0;
  --line:#d4ded9; --line2:#c4d2cc;
  --maxw:1180px;
  --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--ink);
  font-family:"Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.7;font-size:16px;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}
.mono{font-family:"Fragment Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
.lat{font-family:"Chakra Petch",sans-serif}
.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}
.nowrap{white-space:nowrap}

/* ---------- 顶栏 ---------- */
.nav{position:relative;z-index:20}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 0}
.brand{font-family:"Chakra Petch","Noto Sans SC",sans-serif;font-weight:700;font-size:22px;display:flex;align-items:center;gap:10px;letter-spacing:.5px}
.brand .pin{width:22px;height:22px;border-radius:50%;background:var(--y);box-shadow:0 0 0 4px rgba(240,185,11,.22);display:inline-block;flex:none}
.brand .en{font-family:"Chakra Petch";font-weight:600;font-size:12px;color:var(--mint)}
.nav-links{display:flex;gap:24px;font-size:15px;font-weight:500}
.nav-links a{color:var(--ink2);padding:4px 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.nav-links a:hover{color:var(--teal);border-color:var(--y)}
.badge-unofficial{font-size:12px;border:1.4px solid var(--line2);color:var(--muted);padding:5px 11px;border-radius:3px;font-weight:700;letter-spacing:.5px;white-space:nowrap}
.nav-toggle{display:none;background:none;border:1.5px solid var(--line2);border-radius:8px;width:44px;height:44px;font-size:20px;color:var(--ink);cursor:pointer}
/* hero 内的顶栏（深底反白） */
.hero .nav-links a{color:#a9d2c9}
.hero .nav-links a:hover{color:#fff}
.hero .brand{color:#EAF6F2}
.hero .badge-unofficial{border-color:#3f6a63;color:#bfe3da}
.hero .nav-toggle{border-color:#3f6a63;color:#EAF6F2}

/* ---------- 语言切换器 ---------- */
.langsw{display:inline-flex;align-items:center;gap:2px;margin-right:auto;margin-left:14px;font-family:"Chakra Petch",sans-serif;font-size:12.5px;font-weight:600}
.langsw a{color:var(--ink2);opacity:.6;padding:4px 8px;border-radius:7px;white-space:nowrap;transition:opacity .15s,background .15s,color .15s;min-height:44px;display:inline-flex;align-items:center}
.langsw a:hover{opacity:1;color:var(--teal)}
.langsw a.on{opacity:1;color:var(--teal);background:rgba(34,179,135,.12)}
.hero .langsw a{color:#a9d2c9}
.hero .langsw a:hover{color:#fff}
.hero .langsw a.on{color:#EAF6F2;background:rgba(91,224,176,.18)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:900;font-size:17px;text-decoration:none;padding:14px 26px;border-radius:11px;border:none;cursor:pointer;font-family:inherit;line-height:1.2;transition:transform .12s,box-shadow .12s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--y);color:#2a1d00}
.btn-primary:hover{box-shadow:0 8px 22px rgba(240,185,11,.35)}
.btn-dark{background:var(--teal);color:#fff}
.btn-dark:hover{box-shadow:0 10px 26px rgba(11,46,49,.3)}
.btn-ghost{background:transparent;border:1.6px solid var(--line2);color:var(--teal);font-weight:700;font-size:15px;min-height:44px;padding:10px 20px}
.btn-ghost:hover{border-color:var(--teal);background:var(--paper2)}

/* ---------- 通用区块标题 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:"Fragment Mono",monospace;font-size:13px;letter-spacing:1.5px;color:var(--mint);font-weight:400;margin-bottom:16px}
.eyebrow .chev{display:inline-flex;width:20px;height:20px;border:1.4px dashed var(--mint);border-radius:50%;align-items:center;justify-content:center;font-size:11px}
.h2{font-size:clamp(28px,4vw,42px);font-weight:900;letter-spacing:-1px;line-height:1.12}

/* ---------- HERO 天降币雨 ---------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 90% at 50% -10%,#114044 0%,#0B2E31 62%);color:#EAF6F2}
.rain{position:absolute;inset:0;z-index:2;pointer-events:none}
.coin,.spark,.chute{will-change:transform}
.coin{position:absolute;top:-70px;width:42px;height:42px;border-radius:50%;background:radial-gradient(circle at 35% 30%,var(--y2),var(--y) 70%);border:2px solid #c2900f;display:flex;align-items:center;justify-content:center;color:#5a3d04;font-weight:900;font-size:15px;box-shadow:inset 0 0 0 4px rgba(255,255,255,.18);animation:rain-fall linear infinite}
.chute{position:absolute;top:-120px;animation:rain-fall linear infinite}
.spark{position:absolute;width:6px;height:6px;border-radius:50%;background:var(--mint2);opacity:.5;animation:rain-fall linear infinite}
@keyframes rain-fall{0%{transform:translateY(0) rotate(0)}100%{transform:translateY(960px) rotate(50deg)}}
.settled{position:absolute;bottom:-20px;z-index:3;width:44px;height:44px;border-radius:50%;background:radial-gradient(circle at 35% 30%,var(--y2),var(--y) 70%);border:2px solid #c2900f;box-shadow:inset 0 0 0 4px rgba(255,255,255,.18)}
.hero-center{position:relative;z-index:4;text-align:center;padding:28px 0 64px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:#0B2E31;background:var(--mint2);padding:8px 17px;border-radius:30px;margin-bottom:22px}
.hero h1{font-size:clamp(34px,6.4vw,74px);line-height:1.05;font-weight:900;letter-spacing:-2px;text-shadow:0 4px 30px rgba(0,0,0,.3)}
.hero h1 .y{color:var(--y2)}
.hero h1 .u{position:relative;white-space:nowrap}
.hero h1 .u::after{content:"";position:absolute;left:-2%;right:-2%;bottom:6px;height:14px;background:var(--y);opacity:.32;z-index:-1;border-radius:3px}
.hsub{font-size:clamp(15px,2vw,18px);line-height:1.75;color:#bfe0d7;max-width:34em;margin:22px auto 0}
.htags{display:flex;gap:10px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.htags span{font-family:"Fragment Mono",monospace;font-size:13px;border:1.4px solid #3f6a63;color:#cdeae2;padding:7px 14px;border-radius:30px}
/* ---------- 披露条 ---------- */
.disclose{position:relative;z-index:4;background:var(--teal2);color:#bfe0d7;font-size:13.5px}
.disclose .wrap{display:flex;align-items:center;gap:14px;padding:14px 40px}
.disclose .tag{flex:none;font-family:"Fragment Mono",monospace;font-size:12px;color:var(--y2);border:1px solid #2f5852;padding:3px 8px;border-radius:3px}
.disclose b{color:#e7f5ef}

/* ---------- 新手第一课 · 显眼入口 ---------- */
.sg-section{padding:26px 0 0}
.startguide{display:flex;align-items:center;gap:22px;background:linear-gradient(100deg,var(--teal) 0%,var(--teal2) 62%,var(--teal3) 100%);color:#EAF6F2;border-radius:16px;padding:22px 28px;position:relative;overflow:hidden;border:1.5px solid #14524e;box-shadow:0 18px 40px -24px rgba(11,46,49,.5);transition:transform .15s ease,box-shadow .15s ease}
.startguide::after{content:"";position:absolute;right:180px;top:-24px;width:130px;height:130px;background:radial-gradient(circle,rgba(240,185,11,.13) 0%,transparent 70%);pointer-events:none}
.startguide:hover{transform:translateY(-2px);box-shadow:0 24px 52px -24px rgba(11,46,49,.6)}
.startguide .sg-icon{flex:none;width:52px;height:52px;border-radius:50%;background:rgba(91,224,176,.14);display:grid;place-items:center;border:1.5px solid rgba(91,224,176,.42)}
.startguide .sg-body{flex:1;min-width:0;position:relative;z-index:1}
.startguide .sg-k{font-family:"Chakra Petch",sans-serif;font-size:12px;font-weight:600;letter-spacing:1.6px;color:var(--mint2);text-transform:uppercase;display:block;margin-bottom:4px}
.startguide .sg-t{font-size:18px;font-weight:500;line-height:1.5;color:#EAF6F2}
.startguide .sg-t b{font-weight:900;color:var(--y2)}
.startguide .sg-go{flex:none;font-weight:700;font-size:15px;color:var(--teal);background:var(--y2);padding:12px 20px;border-radius:10px;white-space:nowrap;transition:box-shadow .2s ease}
.startguide:hover .sg-go{box-shadow:0 0 0 4px rgba(255,211,77,.25)}
@media(max-width:900px){
  .startguide{flex-wrap:wrap;gap:12px 14px;padding:18px}
  .startguide::after{right:-20px}
  .startguide .sg-body{flex:1 1 calc(100% - 66px)}
  .startguide .sg-t{font-size:16px}
  .startguide .sg-go{flex:1 1 100%;min-height:44px;display:flex;align-items:center;justify-content:center}
}

/* ---------- 通用版块 ---------- */
.section{padding:80px 0}
.section.tight{padding:64px 0}
.lead{font-size:17px;color:var(--ink2);line-height:1.85;max-width:42em}

/* 四件套 编号横条 */
.four-head{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:end;margin-bottom:34px}
.four-head .lead{align-self:center}
.rowset{border-top:2px solid var(--ink)}
.row4{display:grid;grid-template-columns:auto 1fr auto;gap:30px;align-items:center;padding:26px 6px;border-bottom:1px solid var(--line);transition:background .15s}
.row4:hover{background:var(--paper2)}
.row4 .num{position:relative;font-family:"Chakra Petch";font-weight:700;font-size:25px;color:var(--y);background:var(--teal);width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;outline:1.6px dashed var(--mint);outline-offset:5px;flex:none}
.row4 .body h3{font-size:23px;font-weight:900;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.row4 .body h3 .en{font-family:"Chakra Petch";font-size:14px;color:var(--mint);font-weight:600}
.row4 .body p{font-size:15px;color:var(--ink2);margin-top:5px;max-width:50em}
.row4 .go{font-family:"Fragment Mono",monospace;font-size:14px;color:var(--teal);font-weight:400;white-space:nowrap;border-bottom:2px solid var(--y);padding-bottom:3px}
.row4:nth-child(2) .num{color:var(--mint2)}
.row4:nth-child(4) .num{color:var(--y2)}

/* 下落轨迹流程 */
.flow{position:relative;overflow:hidden;background:var(--teal);color:#EAF6F2;padding:84px 0 100px}
.flow .eyebrow{color:var(--mint2)}
.flow .eyebrow .chev{border-color:var(--mint2)}
.flow .h2{color:#fff}
.flow .frain{position:absolute;inset:0;opacity:.5;pointer-events:none}
.dropgrid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:50px}
.traj{position:absolute;left:0;top:0;width:100%;height:100%;pointer-events:none;z-index:0}
.drop{position:relative;z-index:1}
.drop:nth-child(3){margin-top:76px}
.drop:nth-child(4){margin-top:152px}
.drop:nth-child(5){margin-top:228px}
.drop .node{width:74px;height:84px;margin-bottom:14px}
.drop .n{font-family:"Fragment Mono",monospace;font-size:13px;color:var(--y2);letter-spacing:1px}
.drop h4{font-size:20px;font-weight:900;margin:9px 0 8px}
.drop p{font-size:14px;color:#a9d2c9;line-height:1.65}

/* 工具台 */
.tools{display:grid;grid-template-columns:1.12fr .88fr;gap:50px;align-items:start;margin-top:42px}
.tool-feat{position:relative;background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:30px;box-shadow:0 26px 50px -16px rgba(11,46,49,.28)}
.tool-feat::after{content:"";position:absolute;left:10%;right:10%;bottom:-26px;height:24px;background:radial-gradient(ellipse at center,rgba(11,46,49,.20),transparent 72%)}
.tool-feat .para{position:absolute;top:-30px;right:26px}
.tool-feat .pill{display:inline-block;font-family:"Fragment Mono",monospace;font-size:12px;background:var(--y);color:#3a2900;padding:4px 11px;border-radius:30px;font-weight:400}
.tool-feat h3{font-size:26px;font-weight:900;margin:14px 0 8px}
.tool-feat>p{font-size:15px;color:var(--ink2);line-height:1.7}
.tool-side .sidehd{font-size:15px;font-weight:700;color:var(--ink2);margin-bottom:6px}
.tool-list{border-top:2px solid var(--ink)}
.tool-row{display:flex;align-items:center;gap:16px;padding:15px 4px;border-bottom:1px solid var(--line);transition:color .15s}
.tool-row .tg{font-family:"Fragment Mono",monospace;font-size:13px;color:var(--muted);width:40px;flex:none}
.tool-row .tn{font-size:16px;font-weight:700;flex:1}
.tool-row .ta{font-size:13px;color:var(--muted)}
.tool-row:hover .tn{color:var(--mint)}

/* 精选文章 */
.feat-art{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;margin-top:42px;align-items:stretch}
.art-big{position:relative;overflow:hidden;background:var(--teal);color:#EAF6F2;border-radius:18px;padding:36px;display:flex;flex-direction:column;justify-content:flex-end;min-height:300px}
.art-big .specks{position:absolute;inset:0;opacity:.6;pointer-events:none}
.art-big .corner{position:absolute;top:24px;right:28px;font-family:"Fragment Mono",monospace;font-size:13px;color:var(--y2);z-index:1}
.art-big .tagk{font-family:"Fragment Mono",monospace;font-size:13px;color:var(--mint2);position:relative;z-index:1}
.art-big h3{font-size:28px;font-weight:900;line-height:1.22;margin:12px 0 12px;position:relative;z-index:1}
.art-big p{font-size:15px;color:#a9d2c9;line-height:1.65;position:relative;z-index:1}
.art-list{display:flex;flex-direction:column}
.art-row{display:grid;grid-template-columns:auto 1fr;gap:18px;padding:18px 4px;border-bottom:1px solid var(--line);align-items:baseline}
.art-row .idx{font-family:"Chakra Petch";font-size:18px;color:var(--y);font-weight:700}
.art-row h4{font-size:18px;font-weight:700;line-height:1.4}
.art-row p{font-size:13.5px;color:var(--muted);margin-top:4px}

/* 信任条 */
.trust{position:relative;overflow:hidden;background:var(--teal2);color:#cfe6df;padding:68px 0}
.trust .train{position:absolute;inset:0;opacity:.4;pointer-events:none}
.trust .wrap{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center}
.trust h3{font-size:28px;font-weight:900;color:#fff;line-height:1.3}
.trust p{font-size:15px;color:#a9d2c9;line-height:1.8;margin-top:14px}
.trust .sig{font-family:"Fragment Mono",monospace;font-size:13px;color:var(--y2);margin-top:18px}
.trust .big44{font-family:"Fragment Mono",monospace;font-size:60px;color:var(--y2);font-weight:400;line-height:1;text-align:right}

/* ---------- 页脚 ---------- */
footer.site{background:var(--ink);color:#a9d2c9;padding:62px 0 30px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.fcol h5{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:.5px}
.fcol a{display:block;font-size:13.5px;color:#88a8a1;padding:5px 0;transition:color .15s}
.fcol a:hover{color:var(--mint2)}
.fbrand{font-weight:900;font-size:22px;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.fbrand .pin{width:20px;height:20px;border-radius:50%;background:var(--y)}
.fbottom{border-top:1px solid #1c4a4d;margin-top:42px;padding-top:22px;font-size:12px;color:#6d8d86;line-height:1.7}
.fbottom a{color:#88a8a1;text-decoration:underline}

/* ==========================================================================
   文章 / 内容页
   ========================================================================== */
.page-head{background:var(--teal);color:#EAF6F2;position:relative;overflow:hidden}
.page-head .frain{position:absolute;inset:0;opacity:.4;pointer-events:none}
.page-head .wrap{position:relative;padding:40px 40px 54px}
.crumb{font-family:"Fragment Mono",monospace;font-size:13px;color:#7fc4b4;margin-bottom:18px}
.crumb a{color:#9ed4c6}
.crumb a:hover{color:#fff}
.page-head .tagk{display:inline-block;font-family:"Fragment Mono",monospace;font-size:12px;color:#0B2E31;background:var(--mint2);padding:5px 12px;border-radius:20px;margin-bottom:16px}
.page-head h1{font-size:clamp(28px,5vw,46px);font-weight:900;line-height:1.18;letter-spacing:-1px;max-width:20em}
.page-head .meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:18px;font-size:13.5px;color:#a9d2c9}
.page-head .meta .mono{color:#cdeae2}

.article-cover{margin:0;border-radius:0}
.article-cover img{width:100%;height:auto;border-bottom:3px solid var(--y)}

.article{display:grid;grid-template-columns:230px 1fr;gap:50px;max-width:var(--maxw);margin:0 auto;padding:54px 40px 30px;align-items:start}
.toc{position:sticky;top:24px}
.toc .toc-h{font-family:"Fragment Mono",monospace;font-size:12px;letter-spacing:1.5px;color:var(--muted);margin-bottom:12px}
.toc ol{list-style:none;counter-reset:toc}
.toc li{counter-increment:toc;margin-bottom:2px}
.toc a{display:block;font-size:13.5px;color:var(--ink2);padding:6px 0 6px 26px;position:relative;line-height:1.45;border-left:2px solid var(--line);transition:color .15s,border-color .15s}
.toc a::before{content:counter(toc,decimal-leading-zero);position:absolute;left:8px;font-family:"Fragment Mono",monospace;font-size:11px;color:var(--muted)}
.toc a:hover{color:var(--teal);border-color:var(--y)}

.prose{font-size:16.5px;line-height:1.85;color:#22332f;max-width:42em}
.prose>p{margin:0 0 1.25em}
.prose h2{font-size:27px;font-weight:900;letter-spacing:-.5px;margin:2em 0 .7em;padding-top:.4em;line-height:1.25;scroll-margin-top:20px}
.prose h2 .mono{font-size:14px;color:var(--mint);margin-right:10px}
.prose h3{font-size:20px;font-weight:700;margin:1.6em 0 .6em}
.prose ul,.prose ol{margin:0 0 1.25em;padding-left:1.3em}
.prose li{margin-bottom:.5em}
.prose strong{font-weight:700;color:var(--teal)}
.prose a.ref{color:#0d6a55;text-decoration:underline;text-underline-offset:2px;font-weight:500}
.prose a.ref:hover{color:var(--mint)}
.prose blockquote{margin:1.6em 0;padding:18px 22px;background:var(--paper2);border-left:4px solid var(--y);border-radius:0 8px 8px 0;font-size:15.5px;color:var(--ink2)}
.prose img{border-radius:10px;margin:1.6em 0}
.prose figure{margin:1.6em 0}
.prose figcaption{font-size:13px;color:var(--muted);margin-top:8px;text-align:center}

/* 行内说明块 */
.callout{margin:1.8em 0;border:1.5px solid var(--line);border-radius:12px;padding:20px 22px;background:var(--card)}
.callout .ct{font-weight:900;font-size:15px;display:flex;align-items:center;gap:9px;margin-bottom:8px}
.callout .ct .dot{width:10px;height:10px;border-radius:50%;flex:none}
.callout.note .ct .dot{background:var(--mint)}
.callout.warn{background:#fff8e8;border-color:#f0d79a}
.callout.warn .ct .dot{background:var(--y)}
.callout.risk{background:#fdeee9;border-color:#f3c3b3}
.callout.risk .ct .dot{background:#e0633a}
.callout p:last-child{margin-bottom:0}
.callout p{margin:0 0 .6em;font-size:15px;line-height:1.75}

/* 编辑组实测段 */
.handson{margin:1.8em 0;border-radius:12px;padding:22px 24px;background:var(--teal);color:#dff0ea}
.handson .ht{font-family:"Fragment Mono",monospace;font-size:12px;letter-spacing:1.5px;color:var(--y2);margin-bottom:10px}
.handson p{margin:0 0 .7em;font-size:15px;line-height:1.8;color:#cfe6df}
.handson p:last-child{margin-bottom:0}
.handson strong{color:#fff}

/* 文章里的转化条 */
.cta-inline{margin:2em 0;background:var(--y);border-radius:14px;padding:22px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta-inline .l{color:#3a2900}
.cta-inline .l b{font-family:"Fragment Mono",monospace;font-size:20px;letter-spacing:2px}
.cta-inline .l .t{font-weight:700;font-size:15px;display:block;margin-bottom:3px}
.cta-inline .l small{font-size:12px;color:#7a5800;display:block;margin-top:5px}

/* 数据表 */
.dtable{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.5px}
.dtable th,.dtable td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--line)}
.dtable th{background:var(--paper2);font-weight:700;color:var(--teal);font-size:13.5px}
.dtable tr:hover td{background:#fafcfb}
.dtable .mono{font-family:"Fragment Mono",monospace}

/* FAQ */
.faq{margin:2.2em 0}
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{cursor:pointer;font-weight:700;font-size:17px;padding:16px 30px 16px 4px;position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:14px;font-size:22px;color:var(--mint);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{color:var(--teal)}
.faq .fa{padding:0 4px 18px;font-size:15px;color:var(--ink2);line-height:1.8}

/* 作者署名 */
.byline{display:flex;gap:16px;align-items:flex-start;margin:2.4em 0 0;padding:22px;background:var(--paper2);border-radius:12px}
.byline .av{width:50px;height:50px;border-radius:50%;background:var(--teal);color:var(--y);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;flex:none;font-family:"Chakra Petch"}
.byline .bn{font-weight:700;font-size:15px}
.byline .br{font-size:13px;color:var(--muted);margin-top:3px;line-height:1.6}

/* 相关文章 / 上下篇 */
.related{border-top:2px solid var(--ink);margin-top:40px;padding-top:24px}
.related h4{font-size:14px;font-family:"Fragment Mono",monospace;letter-spacing:1.5px;color:var(--muted);margin-bottom:14px}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.related-grid a{display:block;padding:16px 18px;border:1.5px solid var(--line);border-radius:12px;transition:border-color .15s}
.related-grid a:hover{border-color:var(--y)}
.related-grid .rt{font-weight:700;font-size:15.5px;line-height:1.4}
.related-grid .rd{font-size:12.5px;color:var(--muted);margin-top:5px}

/* ==========================================================================
   工具页
   ========================================================================== */
.tool-app{max-width:780px;margin:0 auto;padding:44px 40px}
.tool-card{background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:28px;box-shadow:0 18px 40px -20px rgba(11,46,49,.25)}
.field-row{display:grid;grid-template-columns:1fr 150px;gap:14px;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}
.field-row label{font-size:15px;font-weight:500}
.field-row label small{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-top:2px}
.field-row input,.field-row select{width:100%;font-family:"Fragment Mono",monospace;font-size:16px;min-height:44px;padding:10px 12px;border:1.5px solid var(--line2);border-radius:8px;background:var(--paper);color:var(--ink);text-align:right}
.field-row select{text-align:left;font-family:inherit}
.field-row input:focus,.field-row select:focus{outline:none;border-color:var(--mint);box-shadow:0 0 0 3px rgba(34,179,135,.15)}
.result-box{margin-top:22px;background:var(--teal);color:#EAF6F2;border-radius:12px;padding:22px 24px}
.result-box .rl{font-size:13px;color:#9ed4c6;font-family:"Fragment Mono",monospace}
.result-box .rv{font-family:"Fragment Mono",monospace;font-size:38px;font-weight:400;color:var(--y2);line-height:1.1;margin-top:6px}
.result-box .rn{font-size:13px;color:#a9d2c9;margin-top:10px;line-height:1.6}
.check-row{display:flex;gap:12px;align-items:center;min-height:44px;padding:11px 0;border-bottom:1px solid var(--line)}
.check-row input{width:24px;height:24px;accent-color:var(--mint);flex:none}
.check-row label{font-size:15px;line-height:1.6;flex:1;cursor:pointer;padding:6px 0}
.tool-note{font-size:13px;color:var(--muted);line-height:1.7;margin-top:18px;padding:14px 16px;background:var(--paper2);border-radius:10px}

/* ==========================================================================
   响应式
   ========================================================================== */
@media(max-width:880px){
  .article{grid-template-columns:1fr;gap:24px}
  .toc{position:static;border:1.5px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--card)}
}
@media(max-width:900px){
  .wrap{padding:0 20px}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--teal);flex-direction:column;gap:0;padding:8px 20px 16px;z-index:30}
  .nav-links.open{display:flex}
  .nav-links a{color:#cfe6df;padding:12px 0;border-bottom:1px solid #1c4a4d}
  .hero .nav-links a{color:#cfe6df}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .badge-unofficial{display:none}
  .chute,.settled{display:none}
  .htop{padding:14px 0}
  .hero-center{padding:6px 0 40px}
  .kicker{margin-bottom:12px;font-size:13px;padding:6px 13px}
  .hero h1{font-size:30px;letter-spacing:-1px}
  .hsub{font-size:15px;line-height:1.6;margin-top:12px;max-width:24em}
  .four-head,.tools,.feat-art,.trust .wrap{grid-template-columns:1fr}
  .four-head{gap:16px}
  .dropgrid{grid-template-columns:1fr 1fr;gap:18px}
  .drop:nth-child(3),.drop:nth-child(4),.drop:nth-child(5){margin-top:0}
  .drop{margin-bottom:20px}
  .row4{grid-template-columns:auto 1fr;gap:16px}
  .row4 .go{grid-column:2;justify-self:start}
  .trust .big44{text-align:left;margin-top:18px}
  .fgrid{grid-template-columns:1fr 1fr}
  .section{padding:54px 0}
  .disclose .wrap{align-items:flex-start;flex-direction:column;gap:8px}
  .cta-inline{flex-direction:column;align-items:flex-start}
  .related-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr;gap:6px}
  .field-row input,.field-row select{text-align:left}
}
@media(prefers-reduced-motion:reduce){
  .coin,.chute,.spark{animation:none;display:none}
  html{scroll-behavior:auto}
}

/* 表格横滚:滚动发生在外层容器,不在 <table> 上(table 上 display:block+overflow 不可靠裁剪 thead/tbody → 页面级横滚) */
.table-scroll{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}

@media(max-width:900px){
  .article{padding:32px 20px 24px}
  .prose{min-width:0;max-width:100%}
  .langsw{margin-left:8px;font-size:12px}
  .langsw a{padding:4px 6px;min-height:44px;display:inline-flex;align-items:center}
}

/* ---------- English(lang=en)字体系统:Manrope 正文/标题 + Chakra Petch 品牌 accent ---------- */
html[lang="en"] body{font-family:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
html[lang="en"] input,html[lang="en"] button,html[lang="en"] select,html[lang="en"] textarea{font-family:inherit}
html[lang="en"] .brand,html[lang="en"] .lat,html[lang="en"] .en,html[lang="en"] .kicker,html[lang="en"] .tagk,html[lang="en"] .eyebrow,html[lang="en"] .langsw{font-family:"Chakra Petch",sans-serif}
html[lang="en"] h1,html[lang="en"] h2,html[lang="en"] .h2,html[lang="en"] h3,html[lang="en"] h4,html[lang="en"] h5{font-family:"Manrope",system-ui,sans-serif;font-weight:800;letter-spacing:-.01em}