:root{
  --bg:#0a0e18; --card:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.09); --tx:#eef2fb; --tx2:#8e9ab5;
  --acc:#3ddc84; --acc2:#25c2ff; --warn:#ffb547;
  --r:16px; --safe: env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--tx);
  font:15px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Noto Sans SC",sans-serif;
  -webkit-font-smoothing:antialiased;
}
/* H5 优先：PC 上收成手机宽度。
   注意这里必须用 overflow-x:clip 而不是 overflow:hidden ——
   带 overflow 的祖先会成为 position:sticky 的参照容器，
   顶栏就会"粘在 #app 上"跟着页面一起滚走。clip 不创建滚动容器，sticky 正常。 */
#app{max-width:480px;margin:0 auto;position:relative;overflow-x:clip;
  min-height:100vh;background:
   radial-gradient(700px 420px at 90% -8%,rgba(61,220,132,.16),transparent 60%),
   radial-gradient(600px 380px at -10% 12%,rgba(37,194,255,.14),transparent 60%),
   var(--bg);
  padding-bottom:calc(84px + var(--safe));
}
@media(min-width:481px){#app{box-shadow:0 0 0 1px var(--line),0 24px 80px rgba(0,0,0,.6)}}
a{color:inherit;text-decoration:none}

/* 图标：尺寸随 font-size 走，颜色继承 color（见 assets/icons.js） */
.ic{display:inline-flex;align-items:center;justify-content:center;
  width:1em;height:1em;flex-shrink:0;vertical-align:-.125em}
.ic svg{display:block}
.wrap{padding:0 18px}
.mt{margin-top:34px}

/* 顶栏 */
header{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;
  padding:12px 18px;backdrop-filter:blur(14px);background:rgba(10,14,24,.72);
  border-bottom:1px solid transparent;transition:border-color .25s}
header.on{border-color:var(--line)}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;letter-spacing:.3px}
.logo .ic-brand{width:28px;height:28px;border-radius:9px;padding:6px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#04220f}
.tg{margin-left:auto;font-size:13px;padding:7px 13px;border-radius:999px;
  border:1px solid var(--line);color:var(--tx2)}
/* 语言切换：顶栏按钮 + 语言弹窗，DOM 全部由 assets/i18n.js 生成 */
#langSwitch{display:flex}
.lang{display:flex;align-items:center;gap:6px;font-size:12.5px;padding:6px 10px;border-radius:999px;
  border:1px solid var(--line);background:transparent;color:var(--tx);font-family:inherit;cursor:pointer}
.lang:active{background:rgba(255,255,255,.06)}
/* 国旗：4:3，圆角小方块，内描边压住浅色旗（日本、荷兰）与深色背景的边界 */
.flag{display:block;width:20px;height:15px;border-radius:3px;flex-shrink:0;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16)}

.lang-modal{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:22px}
.lang-modal[hidden]{display:none}
.lang-mask{position:absolute;inset:0;background:rgba(0,0,0,.62);backdrop-filter:blur(4px)}
.lang-box{position:relative;width:100%;max-width:420px;padding:18px 16px 16px;
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:0 24px 70px rgba(0,0,0,.55);animation:langIn .18s ease-out}
@keyframes langIn{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}
.lang-title{margin:0 0 14px;font-size:13px;font-weight:600;color:var(--tx2);text-align:center;letter-spacing:.2px}
/* 一行 2~3 个：窄屏两列，容器宽一点自动排成三列 */
.lang-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:8px}
.lang-opt{display:flex;align-items:center;gap:9px;padding:11px 12px;border-radius:12px;
  border:1px solid var(--line);background:var(--card);color:var(--tx);
  font:inherit;font-size:13.5px;text-align:left;cursor:pointer;transition:border-color .15s,color .15s}
.lang-opt span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lang-opt.on{border-color:var(--acc);color:var(--acc)}
.lang-opt:active{transform:scale(.975)}
@media(prefers-reduced-motion:reduce){.lang-box{animation:none}.lang-opt:active{transform:none}}

/* Hero */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--acc);
  background:rgba(61,220,132,.1);border:1px solid rgba(61,220,132,.25);
  padding:5px 11px;border-radius:999px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--acc);animation:p 1.6s infinite;flex-shrink:0}
@keyframes p{0%,100%{opacity:1}50%{opacity:.25}}
h1{font-size:31px;line-height:1.28;margin:14px 0 10px;letter-spacing:-.5px}
h1 em{font-style:normal;background:linear-gradient(100deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--tx2);font-size:14.5px;margin:0}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:20px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 8px;text-align:center}
.stat b{display:block;font-size:19px;font-family:ui-monospace,Menlo,monospace;transition:color .3s,text-shadow .3s}
.stat b.up{color:var(--acc);text-shadow:0 0 14px rgba(61,220,132,.5)}
.stat span{font-size:11.5px;color:var(--tx2)}

/* 计算器 */
.calc{margin-top:18px;background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line);border-radius:20px;padding:16px}
.calc h3{margin:0 0 12px;font-size:15px;display:flex;align-items:center;gap:7px}
.calc h3 .ic{font-size:17px;color:var(--acc)}
.tabs{display:flex;background:rgba(0,0,0,.28);border-radius:12px;padding:4px;gap:4px}
.tabs button{flex:1;border:0;background:transparent;color:var(--tx2);font-size:13px;
  padding:9px 0;border-radius:9px;font-family:inherit;transition:.2s;cursor:pointer}
.tabs button.on{background:rgba(255,255,255,.1);color:var(--tx);font-weight:600}
.row{display:flex;align-items:center;justify-content:space-between;margin:16px 0 8px;font-size:13px;color:var(--tx2)}
.row b{color:var(--tx);font-size:15px;font-family:ui-monospace,Menlo,monospace}
input[type=range]{width:100%;height:4px;border-radius:4px;-webkit-appearance:none;appearance:none;
  background:linear-gradient(90deg,var(--acc) var(--pct,30%),rgba(255,255,255,.13) var(--pct,30%))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;
  background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.5);cursor:pointer}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border:0;border-radius:50%;background:#fff;cursor:pointer}
.quick{display:flex;gap:7px;margin-top:12px}
.quick span{flex:1;text-align:center;font-size:12.5px;padding:7px 0;border-radius:9px;
  border:1px solid var(--line);color:var(--tx2);cursor:pointer;white-space:nowrap}
.quick span.on{border-color:var(--acc);color:var(--acc);background:rgba(61,220,132,.08)}
.res{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);display:flex;align-items:flex-end;gap:10px}
.res .p{font-size:29px;font-weight:700;font-family:ui-monospace,Menlo,monospace;line-height:1}
.res .u{color:var(--tx2);font-size:13px;padding-bottom:2px}
.res .save{margin-left:auto;font-size:12px;color:var(--acc);background:rgba(61,220,132,.1);
  padding:5px 9px;border-radius:8px;text-align:right}
.hint{margin:10px 0 0;font-size:11.5px;color:var(--tx2)}

/* 通用块 */
h2{font-size:20px;margin:0 0 4px;letter-spacing:-.3px}
.lead{color:var(--tx2);font-size:13.5px;margin:0 0 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:15px}
.feats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.feats .card .ic{font-size:21px;color:var(--acc)}
.feats h4{margin:9px 0 4px;font-size:14.5px}
.feats p{margin:0;font-size:12.5px;color:var(--tx2);line-height:1.55}

/* 套餐 */
.plan{display:flex;align-items:center;gap:12px;margin-bottom:10px;position:relative;
  cursor:pointer;color:inherit;transition:border-color .2s,background .2s,transform .12s}
.plan:active{transform:scale(.985)}
.plan:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
.plan.hot{border-color:rgba(61,220,132,.4);background:linear-gradient(100deg,rgba(61,220,132,.09),var(--card))}
/* 单选圈 */
.plan .rd{flex-shrink:0;width:19px;height:19px;border-radius:50%;
  border:1.5px solid rgba(255,255,255,.28);position:relative;transition:.2s}
.plan.sel{border-color:var(--acc);background:linear-gradient(100deg,rgba(61,220,132,.13),var(--card));
  box-shadow:0 0 0 1px rgba(61,220,132,.35)}
.plan.sel .rd{border-color:var(--acc);background:var(--acc)}
.plan.sel .rd::after{content:"";position:absolute;left:5.5px;top:2.5px;width:4px;height:8px;
  border:solid #04220f;border-width:0 2px 2px 0;transform:rotate(43deg)}
/* 批发档：不参与单选，虚线圈 + 箭头表示「跳转联系」而非「可勾选」 */
.plan.wholesale .rd{border-style:dashed;display:grid;place-items:center}
/* 用两条边拼出 chevron，避免 › 字形自带边距导致偏心；先平移再旋转，位移才是屏幕坐标 */
.plan.wholesale .rd::after{content:"";width:5px;height:5px;
  border:solid var(--tx2);border-width:1.5px 1.5px 0 0;transform:translateX(-1px) rotate(45deg)}
.plan.wholesale:active .rd{border-color:var(--tx2)}
.plan .tag{position:absolute;top:-8px;right:12px;font-size:10.5px;background:var(--acc);
  color:#04220f;padding:2px 8px;border-radius:6px;font-weight:700}
.plan .l{flex:1;min-width:0}
.plan .l b{font-size:15px}
.plan .l p{margin:3px 0 0;font-size:12px;color:var(--tx2)}
.plan .r{text-align:right;flex-shrink:0}
.plan .r b{font-size:19px;font-family:ui-monospace,Menlo,monospace;color:var(--acc)}
.plan .r s{display:block;font-size:11.5px;color:var(--tx2);text-decoration:none}

/* 步骤 */
.step{display:flex;gap:13px;padding:13px 0;border-bottom:1px solid var(--line)}
.step:last-child{border:0}
.step .n{flex-shrink:0;width:26px;height:26px;border-radius:9px;display:grid;place-items:center;
  font-size:12.5px;font-weight:700;background:rgba(61,220,132,.12);color:var(--acc)}
.step b{font-size:14.5px}
.step p{margin:3px 0 0;font-size:12.5px;color:var(--tx2)}

/* API */
pre{margin:0;background:#070a12;border:1px solid var(--line);border-radius:12px;
  padding:13px;overflow-x:auto;font:11.5px/1.75 ui-monospace,Menlo,monospace;color:#a8b4cc}
pre .k{color:var(--acc2)} pre .s{color:var(--acc)} pre .c{color:#5a6480}

/* FAQ */
.q{border-bottom:1px solid var(--line)}
.q:last-child{border:0}
.q summary{list-style:none;cursor:pointer;padding:14px 0;font-size:14px;display:flex;align-items:center;gap:10px}
.q summary::-webkit-details-marker{display:none}
.q summary::after{content:"+";margin-left:auto;color:var(--tx2);font-size:18px;transition:.25s;flex-shrink:0}
.q[open] summary::after{transform:rotate(45deg)}
.q p{margin:0 0 14px;font-size:13px;color:var(--tx2);line-height:1.7}

footer{padding:30px 18px 24px;text-align:center;color:var(--tx2);font-size:12px;
  border-top:1px solid var(--line);margin-top:36px}
footer .links{display:flex;justify-content:center;gap:18px;margin-bottom:12px;font-size:13px;color:var(--tx)}

/* 底部固定 CTA */
.bar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:480px;z-index:30;
  padding:10px 18px calc(10px + var(--safe));display:flex;gap:10px;align-items:center;
  background:rgba(10,14,24,.86);backdrop-filter:blur(16px);border-top:1px solid var(--line)}
.bar .price{flex-shrink:0;line-height:1.25}
.bar .price b{display:block;font-size:16px;font-family:ui-monospace,Menlo,monospace;color:var(--acc)}
.bar .price span{font-size:11px;color:var(--tx2)}
.btn{flex:1;text-align:center;padding:13px 0;border:0;border-radius:13px;font-size:15px;font-weight:600;
  font-family:inherit;cursor:pointer;color:#04220f;background:linear-gradient(100deg,var(--acc),#7ef0b0);
  box-shadow:0 6px 22px rgba(61,220,132,.28)}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.5;box-shadow:none;cursor:default}
.btn:disabled:active{transform:none}

.btn.wide{display:block;width:100%;border:0;font-family:inherit;cursor:pointer;margin-top:16px}
.ghost{display:block;width:100%;margin-top:10px;padding:11px 0;border:0;background:transparent;
  color:var(--tx2);font-size:13.5px;font-family:inherit;cursor:pointer}

/* ================= 下单弹层 ================= */
.mask{position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.6);backdrop-filter:blur(2px);
  animation:fade .25s}
@keyframes fade{from{opacity:0}}
.sheet{position:fixed;bottom:0;left:50%;transform:translateX(-50%);z-index:50;
  width:100%;max-width:480px;max-height:92vh;overflow-y:auto;-webkit-overflow-scrolling:touch;
  background:#111726;border-radius:22px 22px 0 0;border:1px solid var(--line);border-bottom:0;
  padding:8px 18px calc(22px + var(--safe));animation:up .3s cubic-bezier(.22,1,.36,1)}
@keyframes up{from{transform:translate(-50%,100%)}}
.sheet .grab{width:38px;height:4px;border-radius:4px;background:rgba(255,255,255,.16);margin:0 auto 14px}
.sheet .x{position:absolute;top:12px;right:14px;width:30px;height:30px;border:0;border-radius:50%;
  background:rgba(255,255,255,.07);color:var(--tx2);cursor:pointer;
  display:grid;place-items:center;padding:8px}
.sheet h3{margin:0 0 4px;font-size:18px}
.sheet .tip{margin:0 0 14px;font-size:13px;color:var(--tx2)}
.sheet .demo{margin:14px 0 0;font-size:11.5px;color:var(--tx2);text-align:center;line-height:1.5}

/* 订单摘要 */
.sum{background:rgba(0,0,0,.24);border:1px solid var(--line);border-radius:14px;padding:4px 14px;margin:14px 0 18px}
.sum>div{display:flex;justify-content:space-between;align-items:center;padding:10px 0;font-size:13.5px;color:var(--tx2)}
.sum>div+div{border-top:1px solid var(--line)}
.sum b{color:var(--tx);font-family:ui-monospace,Menlo,monospace;font-size:14px}
.sum .tt b{color:var(--acc);font-size:18px}

/* 表单 */
.fl{display:block;font-size:13px;color:var(--tx2);margin-bottom:7px}
#addr{width:100%;padding:13px;border-radius:12px;background:rgba(0,0,0,.3);
  border:1px solid var(--line);color:var(--tx);font:13px ui-monospace,Menlo,monospace}
#addr:focus{outline:0;border-color:var(--acc)}
#addr.bad{border-color:#ff6b6b}
.err{margin:8px 0 0;font-size:12px;color:#ff6b6b}

/* 二维码 */
.qr{display:grid;place-items:center;padding:14px;background:#fff;border-radius:16px;margin-bottom:16px}
.qr svg{display:block;border-radius:4px}

/* 键值行（可复制） */
.kv{display:flex;align-items:center;gap:10px;padding:12px 13px;margin-bottom:8px;
  background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:12px;font-size:13px;color:var(--tx2)}
.kv b{margin-left:auto;color:var(--tx);font-size:13.5px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kv .mono{font-family:ui-monospace,Menlo,monospace;font-size:12px}
.kv i{flex-shrink:0;font-style:normal;font-size:11.5px;color:var(--acc);cursor:pointer;
  border:1px solid rgba(61,220,132,.3);border-radius:7px;padding:3px 8px}
.kv i:active{background:rgba(61,220,132,.15)}

/* 倒计时 */
.cd{margin:14px 0 0;text-align:center;font-size:13px;color:var(--tx2)}
.cd b{color:var(--warn,#ffb547);font-family:ui-monospace,Menlo,monospace}
.cd.over{color:#ff6b6b}

/* 成功 */
.ok{width:56px;height:56px;margin:6px auto 14px;border-radius:50%;display:grid;place-items:center;
  color:#04220f;background:var(--acc);padding:14px;animation:pop .4s cubic-bezier(.2,1.4,.4,1)}
.ok .ic{width:100%;height:100%}
.ok svg{stroke-width:3}
@keyframes pop{from{transform:scale(.3);opacity:0}}
.sheet .ok+h3,.sheet .ok~.tip{text-align:center}

.rise{opacity:0;transform:translateY(18px);transition:opacity .55s,transform .55s}
.rise.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rise{opacity:1;transform:none;transition:none}}

/* ============ 「请在 Safari 中打开」引导页（assets/browser-gate.js） ============ */
.gate{position:fixed;inset:0;z-index:999;overflow-y:auto;-webkit-overflow-scrolling:touch;
  background:var(--bg);display:flex;
  padding:calc(26px + env(safe-area-inset-top,0px)) 20px calc(26px + var(--safe))}
.gate .inner{margin:auto;width:100%;max-width:400px;text-align:center}
.gate h1{font-size:22px;line-height:1.35;margin:0 0 8px;letter-spacing:-.3px}
.gate .gsub{margin:0 0 20px;font-size:13.5px;color:var(--tx2);line-height:1.65}
.gate img{display:block;width:100%;height:auto;max-width:320px;margin:0 auto 20px;
  border-radius:16px;border:1px solid var(--line);background:#fff}
.gate .gsteps{list-style:none;margin:0 0 20px;padding:0;text-align:left}
.gate .gsteps li{display:flex;align-items:center;gap:11px;padding:11px 13px;margin-bottom:8px;
  background:var(--card);border:1px solid var(--line);border-radius:13px;font-size:13.5px}
.gate .gsteps b{flex-shrink:0;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  font-size:12px;background:rgba(61,220,132,.16);color:var(--acc)}
.gate .ghint{margin:0 0 10px;font-size:12.5px;color:var(--tx2)}
.gate .gurl{font:11.5px/1.6 ui-monospace,Menlo,monospace;color:var(--tx2);word-break:break-all;
  background:rgba(0,0,0,.28);border:1px solid var(--line);border-radius:11px;padding:10px 12px;
  margin-bottom:14px;-webkit-user-select:all;user-select:all}
.gate .gbtn{width:100%;padding:14px 0;border:0;border-radius:13px;font-size:15px;font-weight:600;
  font-family:inherit;cursor:pointer;color:#04220f;background:linear-gradient(100deg,var(--acc),#7ef0b0)}
.gate .gbtn:active{transform:scale(.99)}