:root{
  --brand:#0052FF; --brand-dark:#003ECC; --brand-soft:#EEF4FF;
  --bg:#FFFFFF; --bg-soft:#F6F8FB; --line:#E8ECF2;
  --text:#14181F; --text2:#5A6272; --text3:#8A93A6;
  --radius:14px; --shadow:0 2px 12px rgba(20,30,60,.05);
  --shadow-hover:0 10px 32px rgba(0,82,255,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg);transition:background .35s}
body{font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:transparent;color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;transition:color .35s}
body>header,body>section,body>footer{position:relative;z-index:1}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
a{color:var(--brand);text-decoration:none}
img{vertical-align:middle}

/* ============ Aurora background ============ */
.aurora-container{position:fixed;inset:0;z-index:0;pointer-events:none}
.aurora-container canvas{width:100%;height:100%;display:block}
.aurora-fallback{background:
  radial-gradient(55% 45% at 15% 0%,rgba(188,213,255,.5),transparent 70%),
  radial-gradient(50% 42% at 85% 15%,rgba(209,227,255,.45),transparent 70%),
  radial-gradient(45% 40% at 50% 100%,rgba(220,234,255,.4),transparent 70%)}

/* ============ Header ============ */
header{position:fixed;top:0;left:0;right:0;z-index:100;padding:14px 24px 0;pointer-events:none}
.nav{pointer-events:auto;display:flex;align-items:center;justify-content:space-between;height:58px;max-width:1072px;margin:0 auto;padding:0 10px 0 20px;background:rgba(255,255,255,.78);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid rgba(230,235,243,.9);border-radius:999px;box-shadow:0 6px 24px rgba(20,30,60,.07);transition:box-shadow .3s,background .3s}
header.scrolled .nav{box-shadow:0 10px 34px rgba(20,30,60,.12);background:rgba(255,255,255,.9)}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo img{width:auto;height:26px}
.logo .name{font-weight:800;font-size:18px;letter-spacing:.2px}
.logo .sub{font-size:15px;color:var(--text2);font-weight:600;margin-left:1px}
.nav-right{display:flex;align-items:center;gap:20px}
.nav-links{display:flex;gap:4px;font-size:14px}
.nav-links a{color:var(--text2);text-decoration:none;padding:7px 14px;border-radius:8px;transition:all .2s}
.nav-links a:hover{color:var(--brand);background:var(--brand-soft)}
.nav-links a.active{color:var(--brand);font-weight:600}
.lang-btn{border:none;background:transparent;border-radius:8px;padding:6px 13px;font-size:12.5px;font-weight:700;color:var(--text2);cursor:pointer;transition:all .2s;letter-spacing:.5px}
.lang-btn:hover{color:var(--brand)}
/* 日/夜模式切换：太阳 ↔ 月亮 */
.theme-btn{width:32px;height:32px;border:none;background:transparent;border-radius:8px;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:color .2s}
.theme-btn:hover{color:var(--brand)}
.theme-btn svg{width:18px;height:18px}
.theme-btn .tb-moon{display:none}
[data-theme="dark"] .theme-btn .tb-sun{display:none}
[data-theme="dark"] .theme-btn .tb-moon{display:block}


/* ============ Icons（无边框裸图标，2x 尺寸） ============ */
.gicon{width:56px;height:56px;display:flex;align-items:center;justify-content:center}
.gicon svg{width:46px;height:46px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.gicon.sm{width:44px;height:44px}
.gicon.sm svg{width:38px;height:38px}
.smi{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:-2px}
.smi.fill{fill:currentColor;stroke:none}

/* ============ Hero (home) ============ */
/* 整体上移：flex 居中 + 上小下大的不对称 padding 把内容块顶上去（顶部给导航栏留位）；
   下滑箭头收进内容流，跟在 KYC 提示下方，不再沉在首屏底缘 */
.hero{min-height:100svh;display:flex;flex-direction:column;align-items:center;text-align:center}
.hero>.wrap{width:100%;flex:1;display:flex;flex-direction:column;justify-content:center;padding-top:96px;padding-bottom:min(30vh,280px)}
/* pre-wrap：保留标题中手动加宽的连续空格（不用  ） */
.hero h1{font-size:clamp(44px,6vw,64px);font-weight:800;letter-spacing:-1.5px;line-height:1.14;margin-bottom:22px;white-space:pre-wrap}
.hero .sub{font-size:17px;color:var(--text2);max-width:660px;margin:0 auto 34px;white-space:pre-wrap}
/* 两个入口卡片与导航栏左右对齐：wrap 内容盒 1120-48=1072px = nav max-width 1072px */
.track-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin:0 auto;width:100%}
.track-card{display:block;background:#fff;border:1.5px solid var(--line);border-radius:22px;padding:22px 24px;cursor:pointer;text-align:left;transition:all .3s cubic-bezier(.16,1,.3,1);position:relative;text-decoration:none;color:inherit}
.track-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.track-card .gicon{width:44px;height:44px;margin-bottom:14px}
.track-card h3{font-size:19px;font-weight:700;margin-bottom:4px}
.track-card .pair{font-size:13.5px;color:var(--brand);font-weight:700;margin-bottom:8px;letter-spacing:.5px}
.track-card p{font-size:13.5px;color:var(--text2);margin-bottom:12px}
.track-go{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:700;color:var(--brand)}
.track-go svg{transition:transform .3s}
.track-card:hover .track-go svg{transform:translateX(4px)}
/* KYC 提示：纯灰色小字，无背景，落在首屏内容末尾；margin auto 真正水平居中
   （flex item 默认 stretch 会让内容靠左，auto 外边距修复） */
.hero-note{margin:30px auto 0;font-size:13px;color:var(--text3);display:inline-flex;align-items:center;gap:8px}
/* 首页下滑箭头：紧跟两个入口卡片下方（覆盖 base 的 margin:0 0 40px） */
.hero .scroll-hint{margin:34px auto 0}

/* ============ Sections ============ */
section{padding:84px 0}
.sec-head{text-align:center;margin-bottom:50px}
.sec-tag{font-size:12.5px;font-weight:700;color:var(--brand);letter-spacing:2px;text-transform:uppercase;margin-bottom:14px}
.sec-head h2{font-size:clamp(44px,6vw,64px);font-weight:800;letter-spacing:-1.2px}
.sec-head p{color:var(--text2);margin-top:10px;font-size:15px}

/* ============ Service ============ */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:all .3s}
.svc-card .gicon{margin-bottom:16px}
.svc-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.svc-card p{font-size:14px;color:var(--text2)}

/* ============ Compliance ============ */
.cmp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.cmp-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:26px 28px;transition:all .3s}
.cmp-card .gicon{margin-bottom:14px}
.cmp-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.cmp-card p{font-size:14px;color:var(--text2)}

/* ============ FAQ ============ */
/* FAQ 固定双列：左右两列各自为独立的 flex 列容器，列内问题始终紧凑排列、无空隙；
   展开任一项只会撑高它所在的列，另一列完全不受影响（仅两列底部高度不同） */
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:1000px;margin:0 auto;align-items:start}
.faq-col{display:flex;flex-direction:column;gap:12px;min-width:0}
.faq-item{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden;transition:all .3s}
.faq-item.open{border-color:var(--brand)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:19px 24px;cursor:pointer;font-size:15.5px;font-weight:600;gap:16px}
.faq-q .arrow{color:var(--text3);transition:transform .3s;font-size:13px;flex:none}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.16,1,.3,1)}
.faq-item.open .faq-a{max-height:260px}
.faq-a p{padding:0 24px 20px;font-size:14px;color:var(--text2)}
/* 更多信息入口：grid-rows 0fr→1fr 展开动画（与 faq-a 手风琴同手法） */
.faq-more{max-width:1000px;margin:12px auto 0}
.faq-more-expand{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s cubic-bezier(.16,1,.3,1)}
.faq-more-inner{overflow:hidden;min-height:0;opacity:0;transform:translateY(-8px);transition:opacity .4s .06s,transform .45s .06s}
.faq-more.open .faq-more-expand{grid-template-rows:1fr}
.faq-more.open .faq-more-inner{opacity:1;transform:none}
.faq-more-bar{text-align:center;margin-top:22px}
.faq-more-btn{display:inline-flex;align-items:center;gap:8px}
.faq-more-btn .arrow{font-size:12px;color:var(--text3);transition:transform .3s}
.faq-more.open .faq-more-btn .arrow{transform:rotate(180deg);color:var(--brand)}

/* ============ TG contact ============ */
#contact{padding:60px 0}
.tg-strip{display:flex;justify-content:center}
.tg-strip .tg-btn{padding:14px 32px;font-size:15px;border-radius:12px}
.tg-btn{display:inline-flex;align-items:center;gap:9px;background:var(--brand);color:#fff;border-radius:10px;padding:12px 28px;font-size:14.5px;font-weight:700;text-decoration:none;transition:all .25s}
.tg-btn:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,82,255,.4)}
.tg-btn svg{width:16px;height:16px}

/* ============ Sub page（全屏首屏，无面包屑） ============ */
/* 首屏标题与首页同一水平线：首页 h1 顶边 = Header 72 + section 84 + wrap 96 = 252px，
   子页 padding-top 180（252-72）对齐；底 padding 587 使首屏总高与首页一致（1062px），
   视口 ≤1062px 时无居中余量，两页标题逐像素同高，超出后随首页同步下移 */
.sub-hero{min-height:100svh;display:flex;align-items:center;position:relative;padding:180px 0 587px;text-align:center}
.sub-hero>.wrap{width:100%}
/* 下滑引导按钮：玻璃质感圆钮，位于 Hero Page 正中间下方的底缘；上下浮动提示 */
.scroll-hint{flex:none;margin:0 0 40px;width:54px;height:54px;border-radius:50%;border:1px solid rgba(255,255,255,.8);background:rgba(255,255,255,.5);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 10px 28px rgba(20,30,60,.14),inset 0 1px 0 rgba(255,255,255,.85);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .3s;animation:hintFloat 2.4s ease-in-out infinite}
.scroll-hint:hover{background:rgba(255,255,255,.72)}
.scroll-hint svg{width:22px;height:22px;stroke:var(--text);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
@keyframes hintFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(9px)}}
/* 子页下滑按钮：绝对定位落在首屏视口底缘上方两个字段（上移后 24→144px）；
   即使内容把 section 撑高过 100svh，按钮也始终落在首屏视口内 */
.sub-hero .scroll-hint{position:absolute;left:50%;bottom:max(144px,calc(100% - 100svh + 144px));margin:0;transform:translateX(-50%);animation:hintFloatX 2.4s ease-in-out infinite}
@keyframes hintFloatX{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,9px)}}
.sub-hero h1{font-size:clamp(44px,6vw,64px);font-weight:800;letter-spacing:-1.5px;line-height:1.14}
.sub-hero .sub{font-size:17px;color:var(--text2);max-width:640px;margin:10px auto 0}
/* 首屏优势：三个 svc-card，布局规格与首页「我们提供什么服务」完全一致
   （text-align:left：抵消 .sub-hero 的居中继承，图标与标题保持左对齐） */
.hero-adv{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:30px auto 0;text-align:left}
/* 标志环：定位到目标步骤卡并全程跟随（JS 每帧同步位置）
   节奏：向右滑入(≈0.35s) → 停留约 1 秒 → 慢慢向下滑出并淡出(≈0.9s) */
.spot-ring{position:fixed;border:2px solid var(--brand);border-radius:18px;box-shadow:0 0 0 6px rgba(0,82,255,.08);pointer-events:none;z-index:70;opacity:0}
.spot-ring.go{animation:spotRing 2.2s cubic-bezier(.16,1,.3,1) forwards}
@keyframes spotRing{
  0%{opacity:0;transform:translateX(-26px)}
  16%{opacity:1;transform:translateX(0)}
  60%{opacity:1;transform:translateX(0)}
  100%{opacity:0;transform:translateY(24px)}
}
/* 风险提示跑马灯（参考 LogoLoop：无缝左滑、两端渐隐、悬停缓停） */
.notice-bar{background:#FFFBF2;border-bottom:1px solid #F5E9CE}
.notice-marquee{overflow:hidden;padding:14px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.notice-track{display:flex;will-change:transform}
.notice-seq{display:flex;gap:10px;padding-right:10px;flex:none}
.notice-chip{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid #F5E3B8;color:#8A6D1A;font-size:12.5px;font-weight:600;border-radius:999px;padding:7px 15px;white-space:nowrap}
.notice-chip .smi{width:13px;height:13px}

/* ============ Flow (sub page) ============ */
.flow-wrap{max-width:780px;margin:0 auto;position:relative}
.step{display:flex;gap:20px;position:relative;padding-bottom:8px}
.step:not(:last-child)::before{content:"";position:absolute;left:23px;top:52px;bottom:0;width:2px;background:var(--line)}
.step.open:not(:last-child)::before{background:linear-gradient(180deg,var(--brand),var(--line))}
.step-num{flex:none;width:48px;height:48px;border-radius:50%;background:#fff;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;color:var(--text3);transition:all .3s;z-index:1;cursor:pointer}
.step-num:hover{border-color:var(--brand);color:var(--brand)}
.step.open .step-num{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(0,82,255,.3)}
.step.open .step-num:hover{color:#fff}
.step-body{flex:1;padding-bottom:28px}
.step-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;transition:all .3s;cursor:pointer}
.step.open .step-card{border-color:var(--brand);box-shadow:var(--shadow-hover)}
.step-head{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;gap:12px}
.step-title{display:flex;align-items:center;gap:10px;min-width:0}
.step-ic{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.step-head h3{font-size:17.5px;font-weight:700}
.step-head .arrow{color:var(--text3);transition:transform .3s;font-size:14px}
.step.open .step-head .arrow{transform:rotate(180deg);color:var(--brand)}
.step-detail{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.16,1,.3,1)}
.step.open .step-detail{max-height:420px}
.step-detail-inner{padding:0 24px 22px;border-top:1px solid var(--bg-soft)}
.step-detail p{font-size:14px;color:var(--text2);margin:14px 0}
.role-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.role-box{background:var(--bg-soft);border-radius:10px;padding:12px 16px;font-size:13px}
.role-box b{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text3);margin-bottom:4px;font-weight:600}
.role-box b .smi{color:var(--brand);width:13px;height:13px}
.step-note{margin-top:12px;display:flex;gap:8px;align-items:flex-start;background:#FFF8EC;border:1px solid #F5E3B8;color:#8A6D1A;font-size:13px;border-radius:10px;padding:10px 14px}
.step-note .smi{width:14px;height:14px;margin-top:2px}
/* 步骤内容方向滑动（参考 Stepper：前进从左侧滑入，回退从右侧滑入） */
@keyframes stepInFwd{from{transform:translateX(-100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes stepInBck{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.step-detail-inner.slide-fwd{animation:stepInFwd .42s cubic-bezier(.16,1,.3,1)}
.step-detail-inner.slide-bck{animation:stepInBck .42s cubic-bezier(.16,1,.3,1)}

/* ============ Docs（个人/企业切换，位于表单卡片内） ============ */
.doc-tabs{display:flex;justify-content:center;gap:10px;margin-bottom:30px}
.switch-btn{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:10px 26px;font-size:15px;font-weight:600;color:var(--text2);cursor:pointer;transition:all .25s;font-family:inherit}
.switch-btn.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(0,82,255,.25)}

/* ============ Apply（资料清单即表单） ============ */
.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:38px;box-shadow:var(--shadow);max-width:760px;margin:0 auto}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600}
.field label i{color:#E5484D;font-style:normal;margin-left:2px}
.field input,.field select,.field textarea{border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px;font-family:inherit;color:var(--text);background:#fff;transition:all .2s;outline:none;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(0,82,255,.12)}
.field textarea{resize:vertical;min-height:88px}
.field .locked{border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px;background:var(--bg-soft);color:var(--text2);display:flex;align-items:center;gap:8px;width:100%}
.submit-btn{grid-column:1/-1;margin-top:8px;background:var(--brand);color:#fff;border:none;border-radius:10px;padding:15px;font-size:16px;font-weight:700;cursor:pointer;transition:all .25s;font-family:inherit}
.submit-btn:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 8px 22px rgba(0,82,255,.3)}
.submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.form-hint{grid-column:1/-1;font-size:12px;color:var(--text3);text-align:center;margin-top:2px}
.success-panel{text-align:center;padding:20px 0}
.success-icon{width:64px;height:64px;border-radius:50%;background:#EAF9F0;color:#16A34A;font-size:30px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.success-panel h3{font-size:22px;margin-bottom:10px}
.success-panel .lead-id{display:inline-block;background:var(--bg-soft);border-radius:8px;padding:6px 16px;font-family:Menlo,monospace;font-size:14px;color:var(--brand);margin:6px 0 14px;font-weight:600}
.success-panel p{font-size:14px;color:var(--text2);max-width:460px;margin:0 auto 24px}
.success-note{margin-top:18px;font-size:12px;color:var(--text3)}

/* ============ Apply CTA + 分步表单弹窗（wizard） ============ */
.apply-cta{text-align:center}
.apply-open{min-width:260px}
.apply-hint{margin-top:14px;font-size:13px;color:var(--text3)}
.fz-mask{position:fixed;inset:0;z-index:200;background:rgba(18,26,48,.32);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;padding:22px}
.fz-mask[hidden]{display:none}
.fz-modal{position:relative;width:100%;max-width:640px;max-height:88vh;overflow-y:auto;background:rgba(255,255,255,.9);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border:1px solid rgba(255,255,255,.75);border-radius:22px;box-shadow:0 24px 64px rgba(10,25,80,.2);padding:30px 30px 26px;animation:fzPop .35s cubic-bezier(.16,1,.3,1)}
@keyframes fzPop{from{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:none}}
.fz-close{position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.85);color:var(--text2);font-size:17px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.fz-close:hover{color:var(--brand);border-color:var(--brand)}
.fz-dots{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:16px}
.fz-dots[hidden],.fz-head[hidden],#fzForm[hidden]{display:none}
.fz-dot{width:26px;height:26px;border-radius:50%;background:#fff;border:1.5px solid var(--line);color:var(--text3);font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all .3s}
.fz-dot.on{background:var(--brand);border-color:var(--brand);color:#fff}
.fz-bar{width:34px;height:2px;background:var(--line);transition:background .3s}
.fz-bar.on{background:var(--brand)}
.fz-head{text-align:center;margin-bottom:22px}
.fz-head h3{font-size:20px;font-weight:800;letter-spacing:-.3px}
.fz-head p{font-size:13px;color:var(--text2);margin-top:6px}
.choice-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.choice-btn{border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:13px 10px;font-size:14px;font-weight:600;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .25s;font-family:inherit}
.choice-btn:hover{border-color:var(--brand);color:var(--brand)}
.choice-btn.on{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);box-shadow:0 4px 14px rgba(0,82,255,.1)}
.ch-ic{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.field label .opt{font-size:11px;color:var(--text3);font-weight:400;margin-left:4px}
.fz-note{display:flex;align-items:flex-start;gap:9px;background:var(--brand-soft);border:1px solid rgba(0,82,255,.16);border-radius:10px;padding:11px 14px;font-size:12.5px;color:var(--brand);line-height:1.6}
.fz-note .smi{width:14px;height:14px;flex:none;margin-top:2px}
.fz-escape{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:12px;background:rgba(246,248,251,.72);border-radius:12px;padding:11px 16px;font-size:12.5px;color:var(--text2)}
.fz-escape a{color:var(--brand);font-weight:700;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;text-decoration:none}
.fz-escape .smi{width:13px;height:13px}
.fz-nav{display:flex;gap:12px;grid-column:1/-1;margin-top:4px}
.fz-back{flex:none;border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:0 22px;font-size:15px;font-weight:600;color:var(--text2);cursor:pointer;transition:all .25s;font-family:inherit}
.fz-back:hover{border-color:var(--brand);color:var(--brand)}
.fz-submit{grid-column:auto;flex:1;margin-top:0}
#fzForm.slide-fwd{animation:stepInFwd .38s cubic-bezier(.16,1,.3,1)}
#fzForm.slide-bck{animation:stepInBck .38s cubic-bezier(.16,1,.3,1)}

/* ============ Footer ============ */
footer{padding:40px 0 48px}
.risk{font-size:12px;color:var(--text3);max-width:860px;margin:0 auto 16px;text-align:center;line-height:1.8}
.copy{text-align:center;font-size:12px;color:var(--text3)}

/* ============ Glass cards (aurora 背景上的毛玻璃) ============ */
.track-card,.svc-card,.cmp-card,.faq-item,.step-card,.form-card,.notice-chip{
  background:rgba(255,255,255,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.role-box{background:rgba(246,248,251,.72)}
.step-num{background:rgba(255,255,255,.85)}
/* hero-note 无背景（纯灰字），规则见 Hero 区 */
.notice-bar{background:rgba(255,251,242,.6);border-bottom:1px solid rgba(245,233,206,.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}

/* ============ Reveal (浮现：上浮 + 淡入，双向触发) ============ */
.reveal{opacity:0;transform:translateY(26px) scale(.98);transition:opacity .72s cubic-bezier(.16,1,.3,1),transform .72s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ============ Card hover（所有卡片统一：浮动 + 阴影 + 蓝色边框） ============ */
:is(.svc-card,.cmp-card,.faq-item,.step-card,.form-card,.notice-chip){transition:all .3s cubic-bezier(.16,1,.3,1)}
:is(.svc-card,.cmp-card,.faq-item,.step-card,.form-card,.notice-chip):hover{
  transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand)}

/* BorderGlow 已应用户要求移除：按钮/卡片只保留干净的蓝色线条边框（hover border-color） */

@media (max-width:900px){
  .hero>.wrap{padding-top:80px;padding-bottom:150px}
  .track-grid,.cmp-grid,.form-grid{grid-template-columns:1fr}
  .faq-cols{grid-template-columns:1fr}
  .track-grid{gap:20px}
  .svc-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  header{padding:10px 24px 0}
  .nav{border-radius:18px;padding:0 8px 0 16px;height:54px}
  .form-card{padding:26px 20px}
  section{padding:60px 0}
  #contact{padding:44px 0}
  .sub-hero{padding:140px 0 220px}/* 顶 padding 对齐首页 h1 水平线（Header 64 + section 60 + wrap 80 = 204） */
  .hero-adv{grid-template-columns:1fr}
}

/* ============ 手机端适配（≤640px：整体缩小卡片、按钮与字号） ============ */
@media (max-width:640px){
  .wrap{padding:0 16px}
  header{padding:10px 16px 0}
  /* 首屏 */
  .hero>.wrap{padding-top:82px;padding-bottom:110px}
  .hero h1{font-size:clamp(29px,8.4vw,38px);letter-spacing:-.8px;margin-bottom:16px}
  .hero .sub{font-size:14.5px;margin-bottom:26px}
  .track-grid{gap:14px}
  .track-card{padding:18px;border-radius:18px}
  .track-card .gicon{width:38px;height:38px;margin-bottom:10px}
  .track-card .gicon svg{width:32px;height:32px}
  .track-card h3{font-size:16.5px}
  .track-card .pair{font-size:12.5px;margin-bottom:6px}
  .track-card p{font-size:12.5px;margin-bottom:10px}
  .track-go{font-size:13px}
  .hero-note{font-size:12px;margin-top:18px;gap:6px}
  .hero .scroll-hint{width:46px;height:46px;margin-top:24px}
  /* 板块 */
  section{padding:52px 0}
  .sec-head{margin-bottom:34px}
  .sec-tag{font-size:11.5px;margin-bottom:10px;letter-spacing:1.5px}
  .sec-head h2{font-size:clamp(27px,7.4vw,34px);letter-spacing:-.8px}
  .sec-head p{font-size:13.5px;margin-top:8px}
  /* 图标整体缩小 */
  .gicon{width:44px;height:44px}
  .gicon svg{width:36px;height:36px}
  .gicon.sm{width:36px;height:36px}
  .gicon.sm svg{width:30px;height:30px}
  /* 服务/合规矩片 */
  .svc-card{padding:20px}
  .svc-card .gicon{margin-bottom:10px}
  .svc-card h3{font-size:15.5px;margin-bottom:6px}
  .svc-card p{font-size:13px}
  .cmp-card{padding:20px}
  .cmp-card .gicon{margin-bottom:10px}
  .cmp-card h3{font-size:15px;margin-bottom:6px}
  .cmp-card p{font-size:13px}
  /* FAQ */
  .faq-q{padding:15px 18px;font-size:14px}
  .faq-a p{padding:0 18px 16px;font-size:13px}
  /* 按钮 */
  .tg-btn{padding:11px 22px;font-size:13.5px}
  .tg-strip .tg-btn{padding:12px 24px;font-size:14px}
  .submit-btn{padding:13px;font-size:15px}
  /* 子页首屏 */
  .scroll-hint{width:46px;height:46px;margin-bottom:26px}
  .scroll-hint svg{width:19px;height:19px}
  .sub-hero{padding:134px 0 200px}/* 顶 padding 对齐首页 h1 水平线（Header 64 + section 52 + wrap 82 = 198） */
  .sub-hero .scroll-hint{bottom:max(116px,calc(100% - 100svh + 116px))}
  .sub-hero h1{font-size:clamp(29px,8.4vw,38px);letter-spacing:-.8px}
  .sub-hero .sub{font-size:14px}
  .hero-adv{margin-top:28px}
  .notice-marquee{padding:12px 0}
  .notice-chip{font-size:11.5px;padding:6px 12px}
  /* 交易流程步骤条 */
  .step{gap:12px}
  .step:not(:last-child)::before{left:18px;top:44px}
  .step-num{width:38px;height:38px;font-size:14px}
  .step-body{padding-bottom:20px}
  .step-head{padding:15px 18px}
  .step-head h3{font-size:15px}
  .step-detail-inner{padding:0 18px 18px}
  .step-detail p{font-size:13px;margin:12px 0}
  .role-row{grid-template-columns:1fr;gap:10px}
  .role-box{font-size:12.5px;padding:10px 14px}
  .step-note{font-size:12px;padding:9px 12px}
  /* 表单 */
  .form-card{padding:22px 16px;border-radius:14px}
  .doc-tabs{gap:8px;margin-bottom:22px}
  .switch-btn{padding:8px 20px;font-size:13.5px}
  .form-grid{gap:14px}
  .field input,.field select,.field textarea{padding:11px 12px;font-size:13.5px}
  .field .locked{padding:11px 12px;font-size:13.5px}
  .success-panel h3{font-size:19px}
  .success-icon{width:54px;height:54px;font-size:25px;margin-bottom:16px}
  /* 表单弹窗 */
  .apply-open{width:100%;min-width:0}
  .fz-modal{padding:24px 18px 20px;border-radius:18px}
  .fz-head h3{font-size:18px}
  .choice-btn{font-size:13px;padding:11px 8px}
  .fz-escape{flex-direction:column;align-items:flex-start;gap:6px}
  .fz-back{padding:0 16px;font-size:14px}
  .step-ic{width:17px;height:17px}
  /* 页脚 */
  footer{padding:32px 0 40px}
  .risk{font-size:11px}
  #contact{padding:40px 0}
}

/* ============ 深色模式（导航栏太阳/月亮按钮切换，[data-theme="dark"]） ============ */
[data-theme="dark"]{
  --brand:#3E8EFF; --brand-dark:#62A5FF; --brand-soft:rgba(62,142,255,.14);
  --bg:#060708; --bg-soft:rgba(255,255,255,.05); --line:rgba(255,255,255,.1);
  --text:#EDEFF3; --text2:#A2A8B3; --text3:#797F8B;
  --shadow:0 2px 12px rgba(0,0,0,.35);
  --shadow-hover:0 12px 34px rgba(62,142,255,.18);
  color-scheme:dark;
}
[data-theme="dark"] .nav{background:rgba(14,15,19,.8);border-color:rgba(255,255,255,.08);box-shadow:0 6px 24px rgba(0,0,0,.35)}
[data-theme="dark"] header.scrolled .nav{background:rgba(14,15,19,.93);box-shadow:0 10px 34px rgba(0,0,0,.45)}
[data-theme="dark"] :is(.track-card,.svc-card,.cmp-card,.faq-item,.step-card,.form-card,.notice-chip){background:rgba(22,24,29,.6)}
[data-theme="dark"] .role-box{background:rgba(255,255,255,.05)}
[data-theme="dark"] .step-num{background:rgba(22,24,29,.9)}
[data-theme="dark"] .notice-bar{background:rgba(52,42,16,.35);border-bottom-color:rgba(140,110,45,.28)}
[data-theme="dark"] .notice-chip{border-color:rgba(190,155,70,.35);color:#DDBB62}
[data-theme="dark"] .step-note{background:rgba(52,42,16,.4);border-color:rgba(190,155,70,.3);color:#DDBB62}
[data-theme="dark"] .switch-btn{background:transparent}
[data-theme="dark"] .form-card{background:rgba(22,24,29,.85)}
[data-theme="dark"] .field input,[data-theme="dark"] .field select,[data-theme="dark"] .field textarea{background:rgba(255,255,255,.05)}
[data-theme="dark"] .field .locked{background:rgba(255,255,255,.06)}
[data-theme="dark"] .fz-modal{background:rgba(18,20,25,.94);border-color:rgba(255,255,255,.1)}
[data-theme="dark"] .fz-close{background:rgba(255,255,255,.07)}
[data-theme="dark"] .fz-dot{background:rgba(255,255,255,.06)}
[data-theme="dark"] .choice-btn{background:rgba(255,255,255,.04)}
[data-theme="dark"] .fz-back{background:rgba(255,255,255,.04)}
[data-theme="dark"] .fz-escape{background:rgba(255,255,255,.05)}
[data-theme="dark"] .fz-note{border-color:rgba(62,142,255,.25)}
[data-theme="dark"] .success-icon{background:rgba(34,197,94,.14);color:#4ADE80}
[data-theme="dark"] .scroll-hint{background:rgba(22,24,29,.55);border-color:rgba(255,255,255,.14);box-shadow:0 10px 28px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.12)}
[data-theme="dark"] .scroll-hint:hover{background:rgba(36,39,46,.78)}
[data-theme="dark"] .aurora-fallback{background:
  radial-gradient(55% 45% at 15% 0%,rgba(12,32,90,.38),transparent 70%),
  radial-gradient(50% 42% at 85% 15%,rgba(16,42,110,.3),transparent 70%),
  radial-gradient(45% 40% at 50% 100%,rgba(8,20,60,.32),transparent 70%)}

/* ============================================================
   Sera Compute Desk — added components (same design system)
   ============================================================ */

/* Nav CTA */
.nav-cta{border:none;background:var(--brand);color:#fff;border-radius:999px;padding:8px 18px;font-size:13.5px;font-weight:700;cursor:pointer;transition:all .25s;font-family:inherit;white-space:nowrap}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 8px 20px rgba(0,82,255,.3)}
@media (max-width:900px){.nav-cta{padding:7px 14px;font-size:12.5px}}

/* hero RFQ card as button (identical to track-card) */
button.track-card{font-family:inherit;width:100%}

/* ghost button next to primary */
.tg-btn.ghost{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.tg-btn.ghost:hover{background:var(--brand-soft);box-shadow:none;transform:translateY(-2px)}
.tg-strip{gap:14px;flex-wrap:wrap}
#contact .sec-head{margin-bottom:34px}

/* ============ Availability ============ */
.av-filters{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.av-demo{display:flex;align-items:flex-start;gap:9px;max-width:760px;margin:0 auto 22px;background:#FFF8EC;border:1px solid #F5E3B8;color:#8A6D1A;font-size:13px;border-radius:10px;padding:11px 16px}
.av-demo .smi{width:14px;height:14px;flex:none;margin-top:2px}
.av-wrap{background:rgba(255,255,255,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.av-table{width:100%;border-collapse:collapse;font-size:13.5px}
.av-table th{text-align:left;font-size:12px;font-weight:700;color:var(--text3);letter-spacing:.4px;padding:14px 12px;border-bottom:1px solid var(--line);white-space:nowrap;background:rgba(246,248,251,.5)}
.av-table td{padding:14px 12px;border-bottom:1px solid var(--line);color:var(--text2);white-space:nowrap;vertical-align:middle}
.av-table tr:last-child td{border-bottom:none}
.av-table tbody tr{transition:background .2s}
.av-table tbody tr:hover{background:rgba(0,82,255,.035)}
.av-table td b{color:var(--text);font-size:14px}
.av-cfg{white-space:normal!important;min-width:200px;max-width:280px}
.av-price{font-weight:700;color:var(--brand)!important}
.av-quote{border:none;background:transparent;color:var(--brand);font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;white-space:nowrap;padding:4px 2px;transition:all .2s}
.av-quote:hover{transform:translateX(2px)}
.av-badge{display:inline-block;font-size:11.5px;font-weight:700;border-radius:999px;padding:4px 11px;white-space:nowrap}
.st-a{background:var(--brand-soft);color:var(--brand);border:1px solid rgba(0,82,255,.18)}
.st-b{background:rgba(90,98,114,.09);color:var(--text2);border:1px solid rgba(90,98,114,.16)}
.st-c{background:rgba(138,147,166,.08);color:var(--text3);border:1px solid var(--line)}
.st-demo{background:#FFF8EC;color:#8A6D1A;border:1px solid #F5E3B8}
.av-note{text-align:center;font-size:12.5px;color:var(--text3);margin-top:18px}
.av-cards{display:none}
.av-empty{text-align:center;padding:56px 24px}
.av-empty .gicon{margin:0 auto 16px}
.av-empty h3{font-size:18px;font-weight:700;margin-bottom:8px}
.av-empty p{font-size:14px;color:var(--text2);max-width:420px;margin:0 auto 22px}

/* mobile offer cards */
@media (max-width:900px){
  .av-table{display:none}
  .av-cards{display:flex;flex-direction:column}
  .av-card{padding:18px;border-bottom:1px solid var(--line)}
  .av-card:last-child{border-bottom:none}
  .av-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:12px}
  .av-card-p{font-size:17px;margin-right:8px}
  .av-card-oem{font-size:13px;color:var(--text2)}
  .av-card-rows{display:grid;grid-template-columns:1fr 1fr;gap:7px 14px;font-size:12.5px;color:var(--text3)}
  .av-card-rows b{color:var(--text);font-weight:600;margin-left:2px}
  .av-card-more{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--text3)}
  .av-card-more b{color:var(--text2);font-weight:600}
  .av-card-actions{display:flex;justify-content:space-between;align-items:center;margin-top:14px}
  .av-expand{border:none;background:transparent;color:var(--text3);font-size:12.5px;font-weight:600;cursor:pointer;font-family:inherit;padding:4px 0}
}

/* ============ Verification proof grid ============ */
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:960px;margin:0 auto}
.proof-chip{display:flex;align-items:center;gap:9px;background:rgba(255,255,255,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13.5px;font-weight:600;color:var(--text2);transition:all .3s cubic-bezier(.16,1,.3,1)}
.proof-chip:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.proof-chip .smi{width:15px;height:15px;color:var(--brand);flex:none}
.vf-note{display:flex;align-items:flex-start;gap:9px;max-width:760px;margin:26px auto 0;background:var(--brand-soft);border:1px solid rgba(0,82,255,.16);border-radius:10px;padding:12px 16px;font-size:13px;color:var(--brand);line-height:1.6}
.vf-note .smi{width:14px;height:14px;flex:none;margin-top:2px}
@media (max-width:900px){.proof-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.proof-grid{grid-template-columns:1fr 1fr;gap:10px}.proof-chip{padding:11px 12px;font-size:12.5px}}

/* ============ RFQ success ============ */
.copy-btn{display:inline-flex;align-items:center;gap:6px;border:1.5px solid var(--line);background:#fff;border-radius:8px;padding:6px 12px;font-size:12.5px;font-weight:600;color:var(--text2);cursor:pointer;font-family:inherit;margin-left:8px;transition:all .2s;vertical-align:middle}
.copy-btn:hover{border-color:var(--brand);color:var(--brand)}
.ok-steps{max-width:340px;margin:0 auto 8px;text-align:left}
.ok-step{display:flex;align-items:center;gap:12px;padding:9px 4px;font-size:14px;color:var(--text2);border-bottom:1px dashed var(--line)}
.ok-step:last-child{border-bottom:none}
.ok-num{flex:none;width:24px;height:24px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}

/* form error states */
.field input.err,.field select.err{border-color:#E5484D;box-shadow:0 0 0 3px rgba(229,72,77,.1)}
.err-msg{font-size:11.5px;color:#E5484D;font-weight:600}
.fz-warnline{grid-column:1/-1;margin-bottom:2px}
.prod-grid{grid-template-columns:repeat(4,1fr)}
@media (max-width:640px){.prod-grid{grid-template-columns:repeat(2,1fr)}}

/* dark-mode additions */
[data-theme="dark"] .av-wrap{background:rgba(22,24,29,.6)}
[data-theme="dark"] .av-table th{background:rgba(255,255,255,.04)}
[data-theme="dark"] .av-table tbody tr:hover{background:rgba(62,142,255,.07)}
[data-theme="dark"] .st-a{background:rgba(62,142,255,.14);border-color:rgba(62,142,255,.3)}
[data-theme="dark"] .st-b{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
[data-theme="dark"] .st-c{background:rgba(255,255,255,.04)}
[data-theme="dark"] .st-demo,.av-demo{background:rgba(52,42,16,.4);border-color:rgba(190,155,70,.3);color:#DDBB62}
[data-theme="dark"] .proof-chip{background:rgba(22,24,29,.6)}
[data-theme="dark"] .vf-note{border-color:rgba(62,142,255,.25)}
[data-theme="dark"] .copy-btn{background:rgba(255,255,255,.06)}
[data-theme="dark"] .tg-btn.ghost{color:var(--brand);border-color:var(--brand)}
[data-theme="dark"] .tg-btn.ghost:hover{background:rgba(62,142,255,.12)}

/* fixes: hidden attribute must always win; wide table scrolls instead of clipping */
[hidden]{display:none!important}
.av-wrap{overflow-x:auto}
.av-table{min-width:1080px}

/* honeypot field — invisible to humans, bots fill it */
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}

/* ============ V2: verification proof cards (6 items, numbered) ============ */
.proof-grid{grid-template-columns:repeat(3,1fr);max-width:1080px}
.proof-card{background:rgba(255,255,255,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:14px;padding:20px 20px 18px;transition:all .3s cubic-bezier(.16,1,.3,1)}
.proof-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.proof-num{font-size:12px;font-weight:800;letter-spacing:1.5px;color:var(--brand);margin-bottom:10px}
.proof-card h3{font-size:15.5px;font-weight:700;margin-bottom:7px;color:var(--text)}
.proof-card p{font-size:13px;line-height:1.7;color:var(--text2)}
@media (max-width:900px){.proof-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.proof-grid{grid-template-columns:1fr;gap:12px}.proof-card{padding:16px}}
[data-theme="dark"] .proof-card{background:rgba(22,24,29,.6)}

/* ============ V2: 3-step wizard quantity grid ============ */
.qty-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media (max-width:640px){.qty-grid{grid-template-columns:repeat(2,1fr)}}

/* ============ V2: availability detail expand ============ */
.av-row{cursor:pointer}
.av-row.open td{background:rgba(0,82,255,.04)}
.av-detail td{padding:0!important;border-bottom:1px solid var(--line);white-space:normal}
.av-detail-box{display:flex;flex-wrap:wrap;gap:8px 28px;padding:14px 18px 16px;background:rgba(246,248,251,.45)}
.av-dt{display:flex;flex-direction:column;gap:3px;min-width:140px;max-width:340px}
.av-dt i{font-style:normal;font-size:11px;font-weight:700;letter-spacing:.5px;color:var(--text3);text-transform:uppercase}
.av-dt b{font-size:13px;font-weight:600;color:var(--text2);white-space:normal;line-height:1.5}
.av-lead-note{text-align:center;font-size:12.5px;color:var(--text3);margin-top:12px}
[data-theme="dark"] .av-detail-box{background:rgba(255,255,255,.03)}
[data-theme="dark"] .av-row.open td{background:rgba(62,142,255,.07)}

/* ============ V2: WeChat modal ============ */
.wx-modal{max-width:420px;text-align:center}
.wx-id-box{display:flex;align-items:center;justify-content:center;gap:12px;margin:18px 0 12px}
.wx-id{font-size:26px;font-weight:800;letter-spacing:.5px;color:var(--text)}
.wx-note{font-size:12.5px;color:var(--text3);line-height:1.7}

/* ============ V2: footer wechat ============ */
.ft-wx{border:none;background:transparent;color:inherit;font:inherit;cursor:pointer;text-decoration:underline;text-underline-offset:3px;padding:0}
.ft-wx:hover{color:var(--brand)}