/* _base.css — reset + 通用变量(构建时拼接到每站 style.css 头部) */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--font:'Cairo','Segoe UI',Tahoma,Arial,sans-serif;--pri:#3556c9;--acc:#0d9488;--bg:#f7f8fb;--card:#ffffff;--ink:#1c2333;--mut:#5b6473;--line:#e4e7ee;--pri-ink:#ffffff;--soft:#eef1f8;--up:#0e9f6e;--dn:#e02424;--rad:12px}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;height:auto;display:block}
.up{color:var(--up)} .dn{color:var(--dn)}
.wrap{max-width:1140px;margin-inline:auto;padding-inline:20px}
[data-rad]{border-radius:var(--rad)}
::selection{background:var(--pri);color:var(--pri-ink)}

/* 工具页表单(全模板共用功能件) */
.tool-wrap{max-width:620px;display:grid;gap:16px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:24px;margin:14px auto 0}
.tool-row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.tool-row>label{flex:1;min-width:130px}
.tool-wrap label{display:grid;gap:6px;font-size:.85rem;font-weight:700;color:var(--mut)}
.tool-wrap input,.tool-wrap select{font:inherit;padding:11px 14px;border:1px solid var(--line);
  border-radius:10px;background:var(--bg);color:var(--ink);width:100%}
.tool-wrap input:focus,.tool-wrap select:focus{outline:2px solid var(--acc);outline-offset:1px}
.tool-btn{display:inline-block;font:inherit;font-weight:800;padding:11px 22px;border:none;cursor:pointer;
  background:var(--pri);color:var(--pri-ink);border-radius:10px}
.tool-swap{background:var(--soft);color:var(--pri);font-size:1.1rem;flex:none;width:52px}
.tool-out{font-size:1.5rem;font-weight:800;color:var(--pri);direction:ltr;text-align:right;
  padding:14px 16px;background:var(--soft);border-radius:10px}
.tool-kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.tool-kv dt{font-size:.78rem;color:var(--mut)}
.tool-kv dd{font-weight:800;direction:ltr;font-size:1.05rem}

:root{--font:'Almarai','Segoe UI',Tahoma,Arial,sans-serif}
[data-palette="p5-slate-cyan"]
/* palettes.css — 5 套调色板(body[data-palette] 覆盖变量) */
[data-palette="p1-indigo-teal"]{--pri:#3b55c4;--acc:#0d9488;--bg:#f6f7fb;--soft:#edf0fa;--pri-ink:#ffffff}
[data-palette="p2-emerald-gold"]{--pri:#047857;--acc:#b45309;--bg:#f4faf7;--soft:#e6f4ec;--pri-ink:#ffffff}
[data-palette="p3-navy-amber"]{--pri:#1e3a5f;--acc:#d97706;--bg:#f5f7fa;--soft:#e9eef5;--pri-ink:#ffffff}
[data-palette="p4-plum-coral"]{--pri:#6d28d9;--acc:#e11d48;--bg:#faf7fc;--soft:#f1eaf9;--pri-ink:#ffffff}
[data-palette="p5-slate-cyan"]{--pri:#334155;--acc:#0891b2;--bg:#f6f8fa;--soft:#e8edf3;--pri-ink:#ffffff}

/* t1 — 现代卡片风 (bx-) */
.bx-wrap{max-width:1150px;margin-inline:auto;padding-inline:20px}
.bx-site-head{background:var(--card);border-bottom:1px solid var(--line)}
.bx-topbar{background:var(--ink);color:#fff;font-size:.8rem}
.bx-topbar-in{display:flex;justify-content:space-between;padding-block:6px;max-width:1150px;margin-inline:auto;padding-inline:20px}
.bx-top-note{opacity:.85}
.bx-mainbar{display:flex;align-items:center;gap:26px;padding-block:14px;flex-wrap:wrap}
.bx-logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:800}
.bx-logo b{color:var(--pri)}
.bx-logo-badge{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--pri),var(--acc));color:#fff;font-weight:800;font-size:1.05rem}
.bx-nav{display:flex;gap:4px;flex-wrap:wrap;font-size:.95rem;font-weight:600}
.bx-nav a{padding:7px 13px;border-radius:9px;color:var(--mut)}
.bx-nav a:hover{background:var(--soft);color:var(--pri)}
.bx-nav-cta{margin-inline-start:auto;background:var(--acc);color:#fff;padding:9px 18px;border-radius:10px;font-weight:700;font-size:.9rem}
.bx-ticker{overflow:hidden;border-block:1px solid var(--line);background:var(--soft);padding-block:8px}
.bx-ticker-track{display:flex;gap:34px;white-space:nowrap;animation:bxslide 42s linear infinite;width:max-content}
@keyframes bxslide{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.bx-tick{display:inline-flex;gap:7px;align-items:center;font-size:.85rem;font-weight:600}
.bx-tick i{font-style:normal;font-size:.8rem}
.bx-hero{background:linear-gradient(160deg,var(--pri) 0%,color-mix(in srgb,var(--pri) 55%,#101422) 100%);color:#fff;padding-block:54px}
.bx-kicker{font-size:.85rem;font-weight:700;letter-spacing:.4px;opacity:.75;margin-bottom:10px}
.bx-hero-title{font-size:clamp(1.7rem,3.6vw,2.6rem);font-weight:800;line-height:1.35;max-width:760px}
.bx-hero-sub{margin-top:12px;max-width:640px;opacity:.88;font-size:1.02rem}
.bx-stat-row{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.bx-stat{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(4px);border-radius:var(--rad);padding:12px 20px;min-width:150px}
.bx-stat b{display:block;font-size:1.25rem}
.bx-stat span{font-size:.8rem;opacity:.8}
.bx-sec{padding-block:42px}
.bx-sec-title{font-size:1.35rem;font-weight:800;margin-bottom:18px;padding-inline-start:13px;border-inline-start:4px solid var(--acc)}
.bx-sec-title-sm{font-size:1.15rem;font-weight:800;margin-bottom:14px}
.bx-coin-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:18px;transition:.18s}
.bx-coin-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(20,30,60,.09);border-color:var(--acc)}
.bx-coin-top{display:flex;justify-content:space-between;font-weight:800}
.bx-coin-top span{color:var(--mut);font-size:.85rem}
.bx-coin-price{font-size:1.3rem;font-weight:800;margin-top:6px;color:var(--pri)}
.bx-coin-meta{display:flex;justify-content:space-between;font-size:.85rem;color:var(--mut);margin-top:4px}
.bx-coin-meta i{font-style:normal;font-weight:700}
.bx-table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:var(--rad)}
.bx-table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:640px}
.bx-table th{background:var(--soft);color:var(--mut);font-size:.82rem;padding:12px 16px;text-align:right}
.bx-table td{padding:13px 16px;border-top:1px solid var(--line)}
.bx-table td i{font-style:normal;font-weight:700}
.bx-coin-link b{color:var(--pri)}
.bx-mini-btn{background:var(--soft);border-radius:8px;padding:5px 12px;font-size:.8rem;font-weight:700;color:var(--pri)}
.bx-pair-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.bx-pair-card{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:15px 18px;display:flex;flex-direction:column;gap:4px}
.bx-pair-card b{font-size:.95rem}
.bx-pair-rate{font-weight:800;font-size:1.12rem;color:var(--pri)}
.bx-pair-card i{font-style:normal;font-size:.85rem;font-weight:700}
.bx-price-head{display:flex;gap:26px;justify-content:space-between;background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:26px;flex-wrap:wrap;align-items:center}
.bx-price-sub{color:var(--mut);font-size:.9rem}
.bx-price-num{font-size:clamp(1.9rem,4vw,2.7rem);font-weight:800;color:var(--pri);direction:ltr}
.bx-chip{display:inline-block;margin-top:6px;padding:4px 12px;border-radius:99px;font-weight:800;font-size:.9rem;background:color-mix(in srgb,var(--up) 14%,transparent)}
.bx-chip.dn{background:color-mix(in srgb,var(--dn) 12%,transparent)}
.bx-kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px 26px}
.bx-kv dt{font-size:.78rem;color:var(--mut)}
.bx-kv dd{font-weight:800}
.bx-spark{color:var(--acc);width:100%;max-width:560px;height:64px}
.bx-faq{max-width:1150px;margin-inline:auto;padding-inline:20px}
.bx-faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);margin-bottom:10px;overflow:hidden}
.bx-faq-item summary{cursor:pointer;font-weight:800;padding:15px 20px;list-style:none;position:relative}
.bx-faq-item summary::after{content:"+";position:absolute;inset-inline-end:18px;font-weight:800;color:var(--acc)}
.bx-faq-item[open] summary::after{content:"−"}
.bx-faq-a{padding:0 20px 16px;color:var(--mut)}
.bx-art-media{margin-block:22px;border-radius:var(--rad);overflow:hidden;border:1px solid var(--line)}
.bx-article{max-width:780px}
.bx-article-lead{font-size:1.12rem;font-weight:600;color:var(--ink);margin-bottom:14px}
.bx-article-h{font-size:1.22rem;font-weight:800;margin:26px 0 10px;padding-inline-start:11px;border-inline-start:4px solid var(--pri)}
.bx-article p{color:#3a4254;margin-bottom:12px}
.bx-related{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:22px;margin:30px auto 0;max-width:900px}
.bx-related h2{font-size:1.08rem;margin-bottom:12px}
.bx-related ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.bx-related a{color:var(--pri);font-weight:600}
.bx-kv-block{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:20px;margin:18px auto 0;max-width:900px}
.bx-cta{display:flex;justify-content:space-between;align-items:center;gap:18px;background:linear-gradient(135deg,var(--pri),var(--acc));color:#fff;border-radius:var(--rad);padding:22px 26px;margin:30px auto 0;max-width:1110px;flex-wrap:wrap}
.bx-cta b{font-size:1.05rem}
.bx-cta p{opacity:.9;font-size:.9rem}
.bx-cta-btn{background:#fff;color:var(--pri);padding:10px 22px;border-radius:10px;font-weight:800}
.bx-hub-list{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px}
.bx-hub-list a{display:flex;justify-content:space-between;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:16px 18px}
.bx-hub-list b{color:var(--pri)}
.bx-hub-list span{color:var(--mut);font-size:.85rem}
.bx-foot{background:var(--ink);color:#c7ccd8;margin-top:60px;padding-block:44px 26px;font-size:.9rem}
.bx-foot-grid{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid #2a3040}
.bx-foot-logo{font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:8px}
.bx-foot-about{max-width:420px;opacity:.8}
.bx-foot-nav{display:grid;grid-auto-flow:row;gap:6px}
.bx-foot-nav a:hover{color:#fff}
.bx-foot-legal{padding-top:18px;display:grid;gap:7px;font-size:.8rem;opacity:.72}
.bx-crumbs{font-size:.82rem;color:var(--mut);padding-block:14px}
.bx-crumbs a{color:var(--pri)}
.bx-crumbs i{font-style:normal;margin-inline:7px;opacity:.5}


.bx-top-date{opacity:.75}
.bx-price-main{display:grid;gap:4px;align-content:center}
.bx-warn{color:#e8c76a}
.bx-disc{opacity:.92}
.bx-attr{opacity:.75}


/* 移动端汉堡菜单(纯CSS) */
.bx-navtog{position:absolute;opacity:0;pointer-events:none;height:0}
.bx-burger{display:none;width:42px;height:38px;border:1px solid var(--line);border-radius:10px;
  flex-direction:column;gap:4px;align-items:center;justify-content:center;cursor:pointer;
  background:var(--card);color:var(--ink);flex:none}
.bx-burger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px}

@media(max-width:880px){
 .bx-burger{display:inline-flex;order:9;margin-inline-start:auto}
 .bx-nav{display:none;position:absolute;top:100%;inset-inline:10px;flex-direction:column;
   background:var(--card);border:1px solid var(--line);border-top:none;border-radius:0 0 14px 14px;
   padding:8px;z-index:60;box-shadow:0 20px 40px rgba(15,22,40,.16)}
 .bx-nav a{padding:12px 14px;border-bottom:1px solid var(--line);border-radius:0}
 .bx-nav a:last-child{border-bottom:none}
 .bx-navtog:checked ~ .bx-nav{display:flex}
 .bx-mainbar{gap:10px;flex-wrap:nowrap}
 .bx-logo{font-size:1.12rem;gap:8px}
 .bx-logo-badge{width:30px;height:30px;font-size:.9rem}
 .bx-nav-cta{order:8;font-size:.8rem;padding:8px 14px}
 .bx-site-head{position:relative}
}

.bx-hub{max-width:1150px;margin-inline:auto;padding-inline:20px}

/* 页面H1 */
.bx-h1x{font-size:1.45rem;font-weight:800;margin:16px 0 4px;color:var(--ink)}