/* ============================================================
   单词哪里跑 · 官网设计系统 v2（20260929 重构）
   风格基准：暖纸底 × 墨色主按钮 × 宋体衬线大标题 × 等宽字标签
   （参考 mimo.mi.com 的版式语法，品牌色延续 App 薄荷绿）
   ============================================================ */

:root{
  --bg:#FCFAF8;            /* 页面底 · 暖纸 */
  --bg-card:#FAF7F3;       /* 卡片底 */
  --bg-deep:#F1ECE5;       /* 深一档段落底 */
  --ink:#1F2329;           /* 近黑主文字 */
  --ink-2:#3A3F46;
  --sub:rgba(31,35,41,.62);
  --faint:rgba(31,35,41,.42);
  --line:#E7DFD3;          /* 暖色发丝线 */
  --line-soft:#EEE8DE;
  --mint:#15A476;          /* 品牌薄荷绿 */
  --mint-deep:#0E7A57;
  --mint-wash:#E9F5F0;
  --peach:#FFF4E8;         /* 暖杏点缀底 */
  --peach-ink:#9A6B13;
  --red:#B3402E;
  --dark:#1F2329;          /* 深色段落/页脚 */
  --dark-2:#2A2F36;
  --cream-on-dark:#F5F1E8;
  --serif:'Noto Serif SC','Songti SC','STSong','SimSun',serif;
  --sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
  --mono:ui-monospace,'SF Mono','JetBrains Mono','Fira Code','Menlo','Consolas',monospace;
  --shadow-1:0 1px 2px rgba(31,35,41,.05);
  --shadow-2:0 4px 24px rgba(31,35,41,.07);
  --shadow-3:0 12px 40px rgba(31,35,41,.12);
  --w:1120px;
}
/* 自托管衬线字体子集（构建时由 www_subset_fonts.py 生成；缺文件时回退系统宋体） */
@font-face{font-family:'Noto Serif SC';src:url('fonts/serif-700.woff2?v=3') format('woff2');font-weight:700 900;font-display:swap}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{background:var(--bg);color:var(--ink);font:16px/1.8 var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
::selection{background:rgba(21,164,118,.22)}

.wrap{max-width:var(--w);margin:0 auto;padding-inline:clamp(18px,4vw,32px)}

/* ---------- 顶栏公告 ---------- */
.kbar{background:var(--dark);color:var(--cream-on-dark);font-size:13px;letter-spacing:.02em}
.kbar .wrap{display:flex;align-items:center;justify-content:center;gap:10px;min-height:38px;padding-block:8px;text-align:center}
.kbar .dot{flex:none;width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 3px rgba(21,164,118,.25);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(21,164,118,.25)}50%{box-shadow:0 0 0 6px rgba(21,164,118,.08)}}
.kbar b{font-weight:600}
.kbar a{color:#8FD9BC;border-bottom:1px solid rgba(143,217,188,.4);padding-bottom:1px}
.kbar a:hover{color:#B7EBD6;border-color:#B7EBD6}
@media(max-width:560px){.kbar .wrap{line-height:1.5;padding-block:7px}}

/* ---------- 顶部导航 ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(252,250,248,.88);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.nav .wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{width:38px;height:38px;border-radius:10px;box-shadow:var(--shadow-1)}
.brand .bt{font:700 17px/1.2 var(--serif);letter-spacing:.06em}
.brand .be{display:block;font:500 9px/1 var(--mono);letter-spacing:.24em;color:var(--faint);margin-top:3px}
.nav .links{display:flex;gap:4px;margin-left:auto}
.nav .links a{font-size:14.5px;color:var(--sub);padding:8px 13px;border-radius:999px;transition:color .15s}
.nav .links a:hover{color:var(--ink)}
.nav .links a.on{color:var(--mint-deep);font-weight:600}
.nav .cta{flex:none;display:inline-flex;align-items:center;gap:7px;background:var(--ink);color:#fff;
  font-size:13.5px;font-weight:600;padding:9px 18px;border-radius:999px;letter-spacing:.02em;
  transition:background .15s, transform .15s}
.nav .cta:hover{background:#000;transform:translateY(-1px)}
.nav .cta svg{width:13px;height:13px}
@media(max-width:680px){
  .nav .wrap{gap:10px;min-height:56px}
  .brand img{width:30px;height:30px}
  .nav .links a{padding:8px 8px;font-size:13.5px}
  .nav .cta{padding:8px 14px;font-size:12.5px}
  .brand .be{display:none}
}
@media(max-width:420px){.nav .cta span{display:none}.nav .cta{padding:8px 10px 8px 12px}}

/* ---------- 段落骨架 ---------- */
.sec{padding-block:clamp(64px,9vw,110px)}
.sec-deep{background:var(--bg-deep)}
.sec-dark{background:var(--dark);color:var(--cream-on-dark)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font:600 12px/1 var(--mono);
  letter-spacing:.28em;color:var(--mint-deep);text-transform:uppercase;margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:1.5px;background:var(--mint)}
.sec-dark .eyebrow{color:#8FD9BC}
.sec-dark .eyebrow::before{background:#8FD9BC}
h1,h2,h3{font-family:var(--serif);font-weight:700;letter-spacing:.01em}
.h2{font-size:clamp(26px,3.6vw,38px);line-height:1.3;margin-bottom:12px}
.h2 .accent{color:var(--mint-deep)}
.sec-dark .h2 .accent{color:#8FD9BC}
.sec-sub{font-size:clamp(15px,1.8vw,17px);color:var(--sub);max-width:40em}
.sec-dark .sec-sub{color:rgba(245,241,232,.66)}
.sec-head{margin-bottom:clamp(30px,4vw,48px)}
.sec-head.center{text-align:center}
.sec-head.center .sec-sub{margin-inline:auto}
.sec-head.center .eyebrow::before{display:none}
.sec-head.center .eyebrow{letter-spacing:.34em}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;
  padding:0 28px;border-radius:999px;background:var(--ink);color:#fff;font-size:15.5px;font-weight:600;
  letter-spacing:.02em;transition:transform .15s,background .15s,box-shadow .15s;box-shadow:var(--shadow-2);cursor:pointer;border:none}
.btn:hover{background:#000;transform:translateY(-1.5px);box-shadow:var(--shadow-3)}
.btn:active{transform:translateY(0)}
.btn.mint{background:var(--mint)}
.btn.mint:hover{background:var(--mint-deep)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn.ghost:hover{background:var(--bg-card);box-shadow:inset 0 0 0 1.5px var(--ink)}
.sec-dark .btn.ghost{color:var(--cream-on-dark);box-shadow:inset 0 0 0 1.5px rgba(245,241,232,.35)}
.sec-dark .btn.ghost:hover{background:rgba(255,255,255,.06);box-shadow:inset 0 0 0 1.5px rgba(245,241,232,.7)}
.btn.sm{min-height:38px;padding:0 18px;font-size:13.5px}
.btn svg{width:15px;height:15px;flex:none}

/* ---------- 卡片 ---------- */
.card{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:26px;
  transition:transform .2s,box-shadow .2s}
.card.hov:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--sub)}
.mono-tag{display:inline-block;font:600 11px/1 var(--mono);letter-spacing:.14em;color:var(--mint-deep);
  background:var(--mint-wash);border-radius:6px;padding:5px 9px;margin-bottom:14px}
.sec-dark .mono-tag,.mono-tag.on-dark{color:#8FD9BC;background:rgba(21,164,118,.16)}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:clamp(30px,5vw,72px);
  align-items:center;padding-block:clamp(56px,8vw,104px) clamp(48px,7vw,88px)}
.hero-bg{position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 88% 6%, rgba(21,164,118,.09), transparent 62%),
    radial-gradient(520px 380px at 4% 92%, rgba(255,244,232,.9), transparent 65%)}
.hero .eyebrow{margin-bottom:20px}
.hero h1{font-size:clamp(36px,5.4vw,62px);line-height:1.22;letter-spacing:.015em;font-weight:700}
.hero h1 .mk{position:relative;white-space:nowrap}
.hero h1 .mk::after{content:"";position:absolute;left:-1%;right:-1%;bottom:.06em;height:.32em;
  background:rgba(21,164,118,.22);border-radius:3px;z-index:-1}
.hero .lead{margin-top:22px;font-size:clamp(15.5px,1.9vw,18px);color:var(--sub);max-width:30em}
.hero .lead b{color:var(--ink);font-weight:600}
.badge-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;align-items:center}
.badge-row a,.badge-row .badge{display:inline-flex;transition:transform .18s,box-shadow .18s;box-shadow:var(--shadow-2);border-radius:11px}
.badge-row a:hover,.badge-row .badge:hover{transform:translateY(-2px);box-shadow:var(--shadow-3)}
.badge-row img,.badge-row svg{height:52px;width:auto;display:block;border-radius:11px}
.hero .fine{margin-top:18px;display:flex;flex-wrap:wrap;gap:3px 12px;font:500 12px/1.7 var(--mono);letter-spacing:.05em;color:var(--faint)}
.hero .fine span{white-space:nowrap}
.hero .fine span+span::before{content:"｜";margin-right:12px;color:var(--line)}
/* 徽章本体（微信小程序） */
.wxbadge{display:inline-flex;align-items:center;gap:11px;background:#111418;color:#fff;height:52px;
  padding:0 18px 0 14px;border-radius:11px;font-family:var(--sans)}
.wxbadge .wxico{flex:none;width:26px;height:26px}
.wxbadge .t1{display:block;font-size:15px;font-weight:600;letter-spacing:.04em;line-height:1.15}
.wxbadge .t2{display:block;font:500 10px/1.4 var(--mono);letter-spacing:.1em;color:#9CCDB8}
/* 右侧视觉：手机拼贴 */
.hero-art{position:relative;display:flex;justify-content:center;align-items:center;min-height:480px}
.hero-art .ph{position:absolute;border-radius:26px;border:6px solid #fff;background:#fff;
  box-shadow:var(--shadow-3),0 0 0 1px var(--line-soft);overflow:hidden}
.hero-art .ph img{width:100%;height:100%;object-fit:cover}
.hero-art .ph1{width:224px;aspect-ratio:393/852;transform:rotate(-4deg) translate(-52px,-14px);z-index:1}
.hero-art .ph2{width:236px;aspect-ratio:393/852;transform:rotate(4.5deg) translate(58px,26px);z-index:2;
  box-shadow:var(--shadow-3),0 0 0 1px var(--line-soft)}
.hero-art .chainchip{position:absolute;z-index:3;background:#fff;border:1px solid var(--line-soft);
  border-radius:14px;box-shadow:var(--shadow-2);padding:10px 14px;display:flex;gap:7px;align-items:center;
  font-size:12.5px;font-weight:600;transform:rotate(-2deg)}
.hero-art .chainchip .c1{font-family:var(--mono);color:var(--mint-deep)}
.hero-art .chainchip .ar{color:var(--faint)}
.hero-art .chainchip .c2{color:var(--peach-ink)}
.hero-art .chainchip .c3{color:var(--red)}
.hero-art .qrfloat{position:absolute;z-index:3;right:-4px;top:-16px;background:#fff;border:1px solid var(--line-soft);
  border-radius:16px;box-shadow:var(--shadow-2);padding:10px;text-align:center;transform:rotate(2deg)}
.hero-art .qrfloat img{width:76px;height:76px;border-radius:8px}
.hero-art .qrfloat span{display:block;font-size:10.5px;color:var(--sub);margin-top:6px;letter-spacing:.05em}
@media(max-width:880px){
  .hero .wrap{grid-template-columns:1fr}
  .hero-art{min-height:400px;margin-top:8px}
  .hero-art .ph1{width:180px;transform:rotate(-4deg) translate(-38px,-8px)}
  .hero-art .ph2{width:190px;transform:rotate(4.5deg) translate(44px,20px)}
}

/* ---------- 数据条 ---------- */
.stats{border-block:1px solid var(--line-soft)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);padding-block:34px}
.stats .st{padding-inline:18px;text-align:center;position:relative}
.stats .st+.st::before{content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;background:var(--line)}
.stats .n{font:700 clamp(26px,3vw,34px)/1.15 var(--serif);color:var(--ink)}
.stats .n i{font-style:normal;color:var(--mint-deep)}
.stats .l{font:600 11.5px/1.6 var(--mono);letter-spacing:.18em;color:var(--faint);margin-top:8px}
@media(max-width:720px){
  .stats .wrap{grid-template-columns:1fr 1fr;row-gap:26px}
  .stats .st:nth-child(3)::before{display:none}
}

/* ---------- 方法三柱 ---------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pillar{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:28px 26px;position:relative;overflow:hidden}
.pillar .no{font:700 13px/1 var(--mono);color:var(--mint-deep);letter-spacing:.2em;margin-bottom:16px;display:block}
.pillar h3{font-size:20px;margin-bottom:10px}
.pillar p{font-size:14.5px;color:var(--sub)}
.pillar .pr{margin-top:16px;font:600 11px/1 var(--mono);letter-spacing:.12em;color:var(--faint);
  border-top:1px dashed var(--line);padding-top:14px}
.pillar .pr b{color:var(--mint-deep);font-weight:600}
@media(max-width:860px){.pillars{grid-template-columns:1fr}}

/* ---------- 记忆链示意 ---------- */
.chaindemo{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:22px;
  padding:clamp(26px,4vw,44px);text-align:center}
.chaindemo .row{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}
.chaindemo .chip{border-radius:14px;padding:12px 20px;font-weight:700;font-size:clamp(15px,2vw,18px);
  border:1px solid transparent}
.chaindemo .chip.en{background:#fff;color:var(--mint-deep);font-family:var(--mono);font-weight:600;
  border-color:var(--line-soft);box-shadow:var(--shadow-1)}
.chaindemo .chip.homo{background:var(--peach);color:var(--peach-ink)}
.chaindemo .chip.cn{background:#FBE9E4;color:var(--red)}
.chaindemo .arr{color:var(--faint);font-weight:700;font-family:var(--mono)}
.chaindemo .say{font-size:14.5px;color:var(--sub);margin-top:22px;max-width:36em;margin-inline:auto}
.chaindemo .say b{color:var(--ink)}

/* ---------- 四轮玩法卡 ---------- */
.rounds4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.r4{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.r4:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.r4 .pic{position:relative;background:var(--bg-deep)}
.r4 .pic img{width:100%;height:auto;aspect-ratio:393/852;object-fit:cover;object-position:top}
.r4 .pic .rn{position:absolute;left:12px;top:12px;font:700 11px/1 var(--mono);letter-spacing:.16em;
  background:rgba(31,35,41,.82);color:#fff;padding:6px 9px;border-radius:7px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.r4 .bd{padding:18px 18px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.r4 h3{font-size:17.5px}
.r4 p{font-size:13.5px;color:var(--sub);flex:1}
.r4 .lnk{font:600 12.5px/1 var(--mono);letter-spacing:.08em;color:var(--mint-deep);margin-top:10px}
@media(max-width:1000px){.rounds4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.rounds4{grid-template-columns:1fr}.r4{flex-direction:row}.r4 .pic{flex:0 0 132px}.r4 .pic img{height:100%;aspect-ratio:auto}.r4 .rn{left:8px;top:8px}}

/* ---------- 赠送亮点 ---------- */
.giftband{background:linear-gradient(180deg,var(--mint-wash) 0%,#fff 100%);border-block:1px solid var(--line-soft)}
.giftband .wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(28px,4vw,56px);align-items:center;
  padding-block:clamp(56px,8vw,92px)}
.giftband h2{font-size:clamp(24px,3.2vw,34px);line-height:1.35}
.giftband .steps{display:grid;gap:0;margin-top:26px;border-top:1px solid var(--line)}
.giftband .gstep{display:flex;gap:14px;align-items:flex-start;padding-block:15px;border-bottom:1px solid var(--line)}
.giftband .gstep .i{flex:none;width:30px;height:30px;border-radius:9px;background:var(--mint);color:#fff;
  display:flex;align-items:center;justify-content:center;font:700 13px/1 var(--mono)}
.giftband .gstep b{display:block;font-size:15px}
.giftband .gstep span{font-size:13.5px;color:var(--sub)}
.giftband .gpick{position:relative}
.giftband .gpick .ph{border-radius:22px;border:6px solid #fff;box-shadow:var(--shadow-3),0 0 0 1px var(--line-soft);overflow:hidden;transform:rotate(2.5deg)}
.giftband .gpick .ph img{width:100%;height:auto;aspect-ratio:393/852;object-fit:cover;object-position:top}
.giftband .gpick .tagp{position:absolute;left:-10px;bottom:22px;background:var(--ink);color:#fff;
  border-radius:999px;font:600 12px/1 var(--mono);letter-spacing:.1em;padding:9px 14px;transform:rotate(-2deg);box-shadow:var(--shadow-2)}
@media(max-width:860px){.giftband .wrap{grid-template-columns:1fr}.giftband .gpick{max-width:300px;margin:6px auto 0}}

/* ---------- 词库覆盖 ---------- */
.packs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:820px;margin:0 auto}
.packs span{font-size:14px;color:var(--ink-2);background:var(--bg-card);border:1px solid var(--line-soft);
  border-radius:999px;padding:8px 16px;transition:border-color .15s,transform .15s}
.packs span:hover{border-color:var(--mint);transform:translateY(-1px)}
.packs .cap{background:var(--ink);color:#fff;border-color:var(--ink);font-weight:600}

/* ---------- 下载 CTA（深色段） ---------- */
.dl{position:relative;overflow:hidden}
.dl .wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(28px,5vw,72px);
  align-items:center;padding-block:clamp(60px,8vw,100px)}
.dl::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 400px at 82% 20%, rgba(21,164,118,.16), transparent 60%)}
.dl h2{font-size:clamp(26px,3.6vw,40px);line-height:1.3}
.dl .lead{color:rgba(245,241,232,.68);margin-top:14px;font-size:16px}
.dl .badge-row{margin-top:30px}
.dl .badge-row .badge,.dl .badge-row a{box-shadow:0 6px 20px rgba(0,0,0,.3)}
.qrcard{background:#fff;border-radius:22px;padding:24px 26px;text-align:center;box-shadow:var(--shadow-3);max-width:280px;justify-self:center}
.qrcard img{width:188px;height:188px;border-radius:12px;margin:0 auto}
.qrcard .qt{font:700 16px/1.4 var(--serif);margin-top:14px}
.qrcard .qs{font-size:12.5px;color:var(--sub);margin-top:4px}
.qrcard .qm{font:500 11px/1.6 var(--mono);letter-spacing:.1em;color:var(--faint);margin-top:10px}
@media(max-width:820px){.dl .wrap{grid-template-columns:1fr}}

/* ---------- 页脚 ---------- */
footer{background:#17191D;color:rgba(245,241,232,.55);font-size:13px}
footer .wrap{padding-block:44px 34px}
.f-row{display:flex;flex-wrap:wrap;gap:14px 30px;align-items:center;justify-content:space-between;margin-bottom:26px}
.f-brand{display:flex;align-items:center;gap:10px;color:var(--cream-on-dark)}
.f-brand img{width:26px;height:26px;border-radius:7px}
.f-brand b{font:700 15px/1 var(--serif);letter-spacing:.06em}
.f-nav{display:flex;flex-wrap:wrap;gap:6px 22px}
.f-nav a{color:rgba(245,241,232,.6);font-size:13px}
.f-nav a:hover{color:var(--cream-on-dark)}
.f-legal{border-top:1px solid rgba(245,241,232,.12);padding-top:22px;line-height:2.1;font-size:12px}
.f-legal a{color:rgba(245,241,232,.5)}
.f-legal a:hover{color:var(--cream-on-dark)}
.f-legal img{display:inline;height:14px;width:auto;vertical-align:-2px;margin-right:4px}
.f-legal .nowrap{white-space:nowrap}
@media(max-width:480px){.f-legal .gsep{display:none}.f-legal .ga{display:inline-block}}

/* ---------- 产品介绍页 ---------- */
.intro-hero .wrap{padding-block:clamp(60px,9vw,110px) clamp(40px,6vw,72px);max-width:880px;text-align:center}
.intro-hero h1{font-size:clamp(30px,4.6vw,50px);line-height:1.32}
.intro-hero .sec-sub{margin:18px auto 0}
.pain3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pain{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:28px 26px}
.pain .ico{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.pain .ico svg{width:22px;height:22px}
.pain h3{font-size:19px;margin-bottom:8px}
.pain p{font-size:14.5px;color:var(--sub)}
.pain p b{color:var(--red);font-weight:600}
@media(max-width:860px){.pain3{grid-template-columns:1fr}}
.cost-list{display:grid;gap:14px;max-width:820px;margin:0 auto}
.cost{display:flex;gap:18px;background:rgba(255,255,255,.05);border:1px solid rgba(245,241,232,.22);
  border-radius:16px;padding:22px 24px;align-items:flex-start}
.cost .m{flex:none;font:700 17px/1.6 var(--mono);letter-spacing:.1em;color:#FFB84D;padding-top:2px;min-width:44px}
.cost b{display:block;font-size:17px;font-weight:700;margin-bottom:4px;color:#fff}
.cost span{font-size:14px;color:rgba(245,241,232,.72)}
.sci-grid{display:grid;gap:16px;max-width:900px;margin:0 auto}
.sci{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:0;background:var(--bg-card);
  border:1px solid var(--line-soft);border-radius:18px;overflow:hidden}
.sci .th{padding:24px 26px;border-right:1px dashed var(--line);display:flex;flex-direction:column;gap:8px}
.sci .th h3{font-size:18px}
.sci .th .en{font:500 11px/1.5 var(--mono);letter-spacing:.08em;color:var(--faint)}
.sci .th p{font-size:13.5px;color:var(--sub)}
.sci .ds{padding:24px 26px;background:#fff;display:flex;flex-direction:column;justify-content:center;gap:8px}
.sci .ds b{font-size:15px;color:var(--ink)}
.sci .ds p{font-size:13.5px;color:var(--sub)}
.sci .ds .hit{display:inline-flex;align-self:flex-start;font:600 11px/1 var(--mono);letter-spacing:.12em;
  color:var(--mint-deep);background:var(--mint-wash);border-radius:6px;padding:5px 8px}
@media(max-width:760px){.sci{grid-template-columns:1fr}.sci .th{border-right:none;border-bottom:1px dashed var(--line)}}
.evid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.ev{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:26px}
.ev .no{font:700 12px/1 var(--mono);letter-spacing:.2em;color:var(--mint-deep);display:block;margin-bottom:14px}
.ev h3{font-size:17.5px;margin-bottom:8px}
.ev p{font-size:14px;color:var(--sub)}
.ev p b{color:var(--ink)}
@media(max-width:760px){.evid{grid-template-columns:1fr}}

/* ---------- 教程页 ---------- */
.toc{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.toc a{font-size:13px;color:var(--sub);border:1px solid var(--line);border-radius:999px;padding:7px 15px;transition:all .15s}
.toc a:hover{color:var(--mint-deep);border-color:var(--mint)}
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:22px;text-align:center}
.step .no{display:inline-flex;width:32px;height:32px;border-radius:10px;background:var(--ink);color:#fff;
  align-items:center;justify-content:center;font:700 14px/1 var(--mono);margin-bottom:14px}
.step img{width:140px;height:auto;aspect-ratio:393/852;object-fit:cover;object-position:top;border-radius:14px;
  border:3px solid #fff;box-shadow:var(--shadow-2);margin:4px auto 14px}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--sub);text-align:left}
@media(max-width:820px){.steps3{grid-template-columns:1fr}.step p{text-align:center}}
.round{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:clamp(22px,3vw,36px);align-items:start;
  background:var(--bg-card);border:1px solid var(--line-soft);border-radius:22px;padding:clamp(22px,3vw,32px);margin-bottom:20px}
.round .txt h3{font-size:20px;margin-bottom:4px}
.round .txt h3 em{font-style:normal;display:block;font:700 12px/1 var(--mono);letter-spacing:.2em;color:var(--mint-deep);margin-bottom:8px}
.round .txt>p{font-size:15px;color:var(--sub);margin-top:10px}
.round .txt>p b{color:var(--ink)}
.round ul{margin-top:12px}
.round li{font-size:14.5px;color:var(--sub);padding-left:18px;position:relative;margin-top:9px}
.round li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--mint)}
.round li b{color:var(--ink)}
.round .pic{justify-self:center;text-align:center}
.round .pic img{width:100%;height:auto;max-width:250px;aspect-ratio:393/852;object-fit:cover;object-position:top;
  border-radius:16px;border:4px solid #fff;box-shadow:var(--shadow-2)}
.round .pic figcaption{font-size:12.5px;color:var(--sub);margin-top:10px}
.shotrow{grid-column:1/-1;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.shotrow figure{text-align:center}
.shotrow img{width:160px;height:auto;aspect-ratio:393/852;object-fit:cover;object-position:top;border-radius:14px;
  border:3px solid #fff;box-shadow:var(--shadow-2)}
.shotrow figcaption{font-size:12.5px;color:var(--sub);margin-top:9px}
@media(max-width:760px){.round{grid-template-columns:1fr}.round .pic img{max-width:210px;margin:0 auto}}
.featgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.fcard{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:18px;padding:24px}
.fcard h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.fcard h3 .n{flex:none;width:26px;height:26px;border-radius:8px;background:var(--mint);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font:700 13px/1 var(--mono)}
.fcard li{font-size:14px;color:var(--sub);padding-left:16px;position:relative;margin-top:7px}
.fcard li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--mint)}
.fcard li b{color:var(--ink)}
.fcard.wide{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:22px;align-items:center}
.fcard.wide img{width:100%;height:auto;max-width:190px;aspect-ratio:393/852;object-fit:cover;object-position:top;
  border-radius:14px;border:3px solid #fff;box-shadow:var(--shadow-2);justify-self:center}
@media(max-width:760px){.featgrid{grid-template-columns:1fr}.fcard.wide{grid-template-columns:1fr}}
/* 赠送教程时间线（完整手机截图，放大到可读） */
.gift-tl{display:grid;gap:0;max-width:920px;margin:0 auto}
.gift-step{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(20px,3vw,40px);align-items:center;
  padding:26px 4px;border-bottom:1px dashed var(--line)}
.gift-step:last-child{border-bottom:none}
.gift-step .txthead{display:flex;gap:16px;align-items:flex-start}
.gift-step .no{flex:none;width:44px;height:44px;border-radius:14px;background:var(--ink);color:#fff;display:flex;
  align-items:center;justify-content:center;font:700 16px/1 var(--mono)}
.gift-step h3{font-size:18px;margin-bottom:6px}
.gift-step p{font-size:14.5px;color:var(--sub)}
.gift-step p b{color:var(--ink)}
.gift-step .shot{text-align:center;justify-self:center}
.gift-step .shot img{width:100%;height:auto;max-width:300px;aspect-ratio:393/852;object-fit:cover;object-position:top;border-radius:16px;
  border:4px solid #fff;box-shadow:var(--shadow-2)}
.gift-step .shot figcaption{font-size:12.5px;color:var(--sub);margin-top:9px}
@media(max-width:760px){
  .gift-step{grid-template-columns:1fr}
  .gift-step .shot{grid-column:1}
  .gift-step .shot img{width:min(320px,100%)}
}
.gift-rules{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.grule{background:var(--peach);border-radius:14px;padding:16px 18px;font-size:13.5px;color:var(--peach-ink)}
.grule b{display:block;font-size:14px;margin-bottom:3px;color:#7A5310}
@media(max-width:720px){.gift-rules{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
details{background:var(--bg-card);border:1px solid var(--line-soft);border-radius:14px;padding:16px 22px;margin-top:12px}
summary{font-weight:600;font-size:15.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font:700 18px/1 var(--mono);color:var(--mint-deep);flex:none;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{font-size:14.5px;color:var(--sub);margin-top:12px}
details p a{color:var(--mint-deep);border-bottom:1px solid rgba(21,164,118,.4)}

/* ---------- 文档页（协议/支持） ---------- */
.doc{max-width:800px;padding-block:clamp(44px,6vw,72px) 64px}
.doc h1{font-size:clamp(26px,3.4vw,34px);line-height:1.4}
.doc .meta{color:var(--sub);font-size:14px;margin:6px 0 30px}
.doc h2{font-size:19px;margin:32px 0 10px}
.doc h3{font-size:16px;margin:20px 0 6px}
.doc p,.doc li{font-size:15px;color:var(--ink-2);margin-bottom:9px;max-width:72ch}
.doc ul{padding-left:1.5em;list-style:disc}
.doc ul li{margin-bottom:5px}
.doc a{color:var(--mint-deep);border-bottom:1px solid rgba(21,164,118,.35)}
.doc .card{margin:14px 0}

/* ---------- 入场动效 ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}

/* ---------- 手机浏览：设备识别独立于宽度，平板沿用原版 ---------- */
.phone-only{display:none}
.is-phone{--sub:#555B61;--faint:#68706E}
.is-phone .phone-only{display:block}
.is-phone .desktop-only{display:none}
.is-phone [id]{scroll-margin-top:80px}
.is-phone .wrap{max-width:620px;padding-inline:max(18px,env(safe-area-inset-left)) max(18px,env(safe-area-inset-right))}
.is-phone .kbar .wrap{min-height:34px;padding-block:7px;gap:8px;font-size:11.5px;line-height:1.5}
.is-phone .nav .wrap{position:relative;min-height:62px;gap:8px}
.is-phone .brand{gap:8px;margin-right:auto}
.is-phone .brand img{width:32px;height:32px}
.is-phone .brand .bt{font-size:17px}
.is-phone .brand .be,.is-phone .nav .links{display:none}
.is-phone .nav .cta{min-height:44px;padding:0 14px;font-size:13px}
.is-phone .nav .cta span{display:inline}
.is-phone .nav .cta svg{display:none}
.is-phone .mobile-menu{position:static;border:0;padding:0;margin:0;background:none;border-radius:0}
.is-phone .mobile-menu>summary{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;color:var(--ink)}
.is-phone .mobile-menu>summary::after{content:none}
.is-phone .mobile-menu>summary svg{width:20px;height:20px}
.is-phone .mobile-menu[open]>summary{background:var(--mint-wash);border-color:var(--mint);color:var(--mint-deep)}
.is-phone .mobile-links{position:absolute;left:0;right:0;top:100%;display:grid;grid-template-columns:1fr 1fr;gap:6px;background:var(--bg);padding:14px 18px 18px;border-bottom:1px solid var(--line);box-shadow:0 12px 20px rgba(31,35,41,.08)}
.is-phone .mobile-links a{display:flex;align-items:center;min-height:48px;padding:8px 14px;border-radius:10px;font-size:15px;color:var(--sub)}
.is-phone .mobile-links a.on{background:var(--mint-wash);color:var(--mint-deep);font-weight:600}
.is-phone .mobile-menu>summary:focus-visible,.is-phone a:focus-visible{outline:2px solid var(--mint-deep);outline-offset:3px}

.is-phone .hero .wrap{grid-template-columns:minmax(0,1fr);gap:28px;padding-block:34px 36px}
.is-phone .hero .eyebrow{font-size:11px;letter-spacing:.2em;margin-bottom:16px}
.is-phone .hero h1{font-size:clamp(34px,8.8vw,40px);line-height:1.3}
.is-phone .hero .lead{font-size:16px;line-height:1.85;margin-top:18px;max-width:none}
.is-phone .hero .badge-row,.is-phone .hero .fine{display:none}
.is-phone .mobile-actions{display:grid;gap:10px;margin-top:24px}
.is-phone .mobile-actions .btn{min-height:50px;padding:10px 16px;border-radius:12px;font-size:15px}
.is-phone .mobile-actions .mobile-wx{background:var(--mint-deep)}
.is-ios-phone .mobile-actions .mobile-wx{background:transparent;color:var(--mint-deep);box-shadow:inset 0 0 0 1px var(--line)}
/* 安卓端 App Store 按钮不再隐藏：点击由 site.js 接管，提示即将上架并跳到小程序码 */
.is-phone .mobile-note{margin-top:12px;font-size:12px;color:var(--sub);text-align:center}
.is-phone .hero-art{min-height:0;justify-content:flex-start;gap:18px;padding:18px;margin:0;background:var(--mint-wash);border:1px solid #D5EADF;border-radius:20px}
.is-phone .hero-art .ph1{position:relative;flex:none;width:48%;max-width:174px;transform:none;border-width:4px;border-radius:20px}
.is-phone .hero-art .ph2,.is-phone .hero-art .chainchip,.is-phone .hero-art .qrfloat{display:none}
.is-phone .mobile-art-copy{flex:1;min-width:0}
.is-phone .mobile-art-copy .mono-tag{font-size:10px;letter-spacing:.1em;margin-bottom:12px}
.is-phone .mobile-art-copy h2{font-size:clamp(17px,4.8vw,22px);line-height:1.55;letter-spacing:0}
.is-phone .mobile-art-copy p{margin-top:12px;font-size:12px;line-height:1.9;color:var(--sub)}
.is-phone .stats .wrap{grid-template-columns:1fr 1fr;padding-block:24px;row-gap:0}
.is-phone .stats .st{padding-inline:8px}
.is-phone .stats .st:nth-child(n+3){display:none}
.is-phone .stats .n{font-size:28px}
.is-phone .stats .l{font-size:12px;letter-spacing:.08em}

.is-phone .sec{padding-block:52px}
.is-phone .sec-head{margin-bottom:26px}
.is-phone .sec-head.center{text-align:left}
.is-phone .sec-head.center .eyebrow{letter-spacing:.2em}
.is-phone .sec-head.center .eyebrow::before{display:block}
.is-phone .h2{font-size:27px;line-height:1.4}
.is-phone .sec-sub{font-size:15px;line-height:1.85}
.is-phone .btn.sm{min-height:44px;line-height:1.6}
.is-phone .pillars{grid-template-columns:minmax(0,1fr);gap:12px}
.is-phone .pillar{padding:22px}
.is-phone .pillar h3{font-size:20px}
.is-phone .pillar p{font-size:15px}
.is-phone .pillar .pr{display:none}
.is-phone .chaindemo{padding:24px 20px;text-align:left}
.is-phone .chaindemo .row{flex-direction:column;gap:8px}
.is-phone .chaindemo .chip{width:100%;text-align:center;font-size:17px;padding:10px 14px}
.is-phone .chaindemo .arr{transform:rotate(90deg);line-height:1.1}
.is-phone .chaindemo .say{font-size:15px;margin-top:18px;line-height:1.85}
.is-phone .chaindemo .say br{display:none}
.is-phone .rounds4{grid-template-columns:minmax(0,1fr);gap:12px}
.is-phone .r4{flex-direction:row;min-width:0}
.is-phone .r4 .pic{flex:0 0 104px}
.is-phone .r4 .pic img{height:100%;aspect-ratio:auto;object-fit:cover}
.is-phone .r4 .pic .rn{left:7px;top:8px;font-size:9px;letter-spacing:.08em;padding:5px 7px}
.is-phone .r4 .bd{min-width:0;padding:16px}
.is-phone .r4 h3{font-size:19px}
.is-phone .r4 p{font-size:14px}
.is-phone .r4 .lnk{line-height:1.5;margin-top:6px}
.is-phone .giftband .wrap{grid-template-columns:minmax(0,1fr);gap:30px;padding-block:48px}
.is-phone .giftband .gpick{max-width:230px;margin:0 auto}
.is-phone .giftband .gstep b{font-size:16px}
.is-phone .giftband .gstep span{font-size:14px}
.is-phone .packs{gap:8px;justify-content:flex-start}
.is-phone .packs span{font-size:13px;padding:7px 12px}

.is-phone .dl{padding-block:0}
.is-phone .dl .wrap{grid-template-columns:minmax(0,1fr);gap:28px;padding-block:48px}
.is-phone .dl h2{font-size:32px}
.is-phone .dl .badge-row{margin-top:24px}
.is-phone .dl .badge-row .badge,.is-phone .dl .fine{display:none}
.is-phone .qrcard{width:100%;max-width:380px;padding:24px;color:var(--ink);justify-self:stretch}
.is-phone .qrcard .qt{font-size:19px}
.is-phone .qrcard .qs{font-size:14px;line-height:1.8;max-width:19em;margin:8px auto 0}
.is-phone .qrcard .qm{font-size:12px;letter-spacing:.03em}
.is-phone .qr-save{display:flex;min-height:48px;margin-top:18px;border-radius:12px;font-size:15px}

.is-phone .intro-hero .wrap{padding-block:40px 32px;text-align:left}
.is-phone .intro-hero h1{font-size:30px}
.is-phone .intro-hero .sec-sub{margin-top:16px}
.is-phone .toc{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:22px}
.is-phone .toc a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:8px;font-size:13px;line-height:1.5;text-align:center;border-radius:10px}
.is-phone .pain3,.is-phone .sci,.is-phone .evid,.is-phone .steps3,.is-phone .round,.is-phone .featgrid,.is-phone .fcard.wide,.is-phone .gift-step,.is-phone .gift-rules{grid-template-columns:minmax(0,1fr)}
.is-phone .pain,.is-phone .ev,.is-phone .fcard{padding:22px}
.is-phone .pain p,.is-phone .ev p,.is-phone .fcard li{font-size:15px}
.is-phone .cost{gap:12px;padding:20px 18px}
.is-phone .cost .m{min-width:32px;font-size:15px}
.is-phone .cost b{font-size:16px}
.is-phone .cost span{font-size:15px}
.is-phone .sci .th{border-right:none;border-bottom:1px dashed var(--line)}
.is-phone .sci .th,.is-phone .sci .ds{padding:22px}
.is-phone .sci .th p,.is-phone .sci .ds p{font-size:15px}
.is-phone .step{padding:22px}
.is-phone .step img{width:220px;max-width:100%}
.is-phone .step p{font-size:15px;text-align:left}
.is-phone .round{padding:20px;gap:22px}
.is-phone .round .txt>p,.is-phone .round li{font-size:15px}
.is-phone .round .pic{max-width:100%}
.is-phone .round .pic img{max-width:260px}
.is-phone .shotrow{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.is-phone .shotrow figure{min-width:0}
.is-phone .shotrow img{width:100%;max-width:200px}
.is-phone .gift-step{padding:26px 0;gap:22px}
.is-phone .gift-step .txthead{gap:12px}
.is-phone .gift-step .no{width:36px;height:36px;border-radius:11px;font-size:14px}
.is-phone .gift-step p{font-size:15px}
.is-phone .gift-step .shot{grid-column:1;max-width:100%}
.is-phone .gift-step .shot img{width:100%;max-width:300px}
.is-phone details:not(.mobile-menu){padding:8px 16px}
.is-phone summary{min-height:44px;font-size:15px}
.is-phone details p{font-size:15px}
.is-phone .doc{padding-block:34px 48px;overflow-wrap:anywhere}
.is-phone .doc h1{font-size:28px}
.is-phone .doc h2{font-size:20px}
.is-phone .doc p,.is-phone .doc li{font-size:16px;line-height:1.85}
.is-phone footer .wrap{padding-block:32px 28px}
.is-phone .f-row{gap:18px}
.is-phone .f-nav{display:grid;grid-template-columns:1fr 1fr;gap:0 16px;width:100%}
.is-phone .f-nav a{display:flex;align-items:center;min-height:44px;font-size:14px}
.is-phone .f-legal{overflow-wrap:anywhere}
.is-phone .f-legal .gsep{display:none}
.is-phone .f-legal .ga{display:inline-block}

/* ---------- 微信下载指引浮层 / 轻提示 / 二维码闪烁（手机端，site.js 注入触发） ---------- */
.wxguide{position:fixed;inset:0;z-index:120;background:rgba(31,35,41,.55);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;padding:24px;
  visibility:hidden;opacity:0;pointer-events:none;
  transition:opacity .22s ease,visibility .22s ease}
.wxguide.on{visibility:visible;opacity:1;pointer-events:auto}
.wxguide .wg-card{background:var(--bg-card);border-radius:22px;box-shadow:var(--shadow-3);
  padding:26px 24px 22px;width:min(320px,100%);text-align:center;
  transform:translateY(12px) scale(.97);transition:transform .22s ease}
.wxguide.on .wg-card{transform:none}
.wxguide .wg-eyebrow{font:600 11px/1 var(--mono);letter-spacing:.26em;color:var(--mint-deep);margin-bottom:10px}
.wxguide .wg-title{font:700 20px/1.4 var(--serif);color:var(--ink);margin-bottom:16px}
.wxguide .wg-steps{text-align:left;display:grid;border-top:1px solid var(--line)}
.wxguide .wg-steps li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--line);
  font-size:14px;color:var(--ink-2);line-height:1.7;list-style:none}
.wxguide .wg-steps li i{flex:none;width:26px;height:26px;border-radius:8px;background:var(--mint);color:#fff;
  display:flex;align-items:center;justify-content:center;font:700 12px/1 var(--mono);font-style:normal;margin-top:3px}
.wxguide .wg-steps b{color:var(--ink);font-weight:600}
.wxguide .wg-note{font-size:12px;color:var(--faint);margin-top:14px}
.wxguide .wg-ok{width:100%;margin-top:14px;min-height:46px}
.wctoast{position:fixed;left:50%;bottom:calc(34px + env(safe-area-inset-bottom));transform:translate(-50%,10px);
  z-index:130;background:rgba(31,35,41,.94);color:#fff;font-size:13.5px;line-height:1.6;letter-spacing:.02em;
  padding:11px 20px;border-radius:999px;box-shadow:var(--shadow-3);
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;
  max-width:min(86vw,420px);text-align:center}
.wctoast.on{opacity:1;transform:translate(-50%,0)}
@keyframes qrcflash{0%,100%{box-shadow:var(--shadow-3)}45%{box-shadow:0 0 0 7px rgba(21,164,118,.30),var(--shadow-3)}}
.qrcard.flash{animation:qrcflash 1.1s ease 2}
.is-phone .qrcard{scroll-margin-top:76px}