/* WeiMind 官网样式 v0.4 —— 从可交互原型 prototype/index.html 提取
   - 颜色 / 字体 / 阴影变量见文件开头（也单独放在 tokens/tokens.css）
   - 已去掉原型专用的“批注”和左下角工具条样式
   - 字体需引入：<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap">
*/
/* Layout: conventional company site (hero, sections, course sales pages) dressed in a Polymarket-inspired system:
   white ground, near-black Inter type, one blue accent, green/red only for meaning, ring-shadow cards,
   and line charts with end-of-line value labels, right-hand axis, dotted grid, range tabs and a hover crosshair. */
:root{
  --paper:#FFFFFF; --surface:#FFFFFF; --surface-2:#F3F4F6; --soft:#F7F8FA;
  --ink:#0E1014; --ink-2:#5E6571; --ink-3:#8F96A2;
  --line:#EDEEF1; --line-strong:#DFE2E7;
  --accent:#2E5CFF; --accent-hover:#1E4BEE; --accent-ink:#2350E6; --on-accent:#FFFFFF; --accent-t:rgba(46,92,255,.10);
  --c2:#1F2C4A;
  --up:#1E9A55; --up-s:#23843F; --up-t:rgba(30,154,85,.12);
  --down:#DD3B3B; --down-t:rgba(221,59,59,.10);
  --promo:linear-gradient(115deg,rgba(46,92,255,.09),rgba(150,110,255,.15));
  --shadow:0 0 0 1px rgba(14,16,20,.07),0 2px 6px -.5px rgba(14,16,20,.03),0 2px 10px rgba(14,16,20,.03);
  --shadow-h:0 0 0 1px rgba(14,16,20,.10),0 8px 22px -6px rgba(14,16,20,.12);
  --shadow-lg:0 0 0 1px rgba(14,16,20,.07),0 18px 44px -14px rgba(14,16,20,.20);
  --f-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"Inter","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --f-code:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --maxw:1200px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#12161C; --surface:#181E25; --surface-2:#1F262F; --soft:#151A21;
    --ink:#F1F3F6; --ink-2:#A2ABB7; --ink-3:#6F7987;
    --line:#232A33; --line-strong:#2F3742;
    --accent:#4A78FF; --accent-hover:#6690FF; --accent-ink:#86A3FF; --on-accent:#FFFFFF; --accent-t:rgba(74,120,255,.16);
    --c2:#B9C4D6;
    --up:#3CC47C; --up-s:#2A9A59; --up-t:rgba(60,196,124,.15);
    --down:#F26868; --down-t:rgba(242,104,104,.14);
    --promo:linear-gradient(115deg,rgba(74,120,255,.16),rgba(150,110,255,.18));
    --shadow:0 0 0 1px rgba(255,255,255,.07),0 2px 8px rgba(0,0,0,.25);
    --shadow-h:0 0 0 1px rgba(255,255,255,.12),0 10px 26px -8px rgba(0,0,0,.6);
    --shadow-lg:0 0 0 1px rgba(255,255,255,.08),0 20px 48px -14px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#12161C; --surface:#181E25; --surface-2:#1F262F; --soft:#151A21;
  --ink:#F1F3F6; --ink-2:#A2ABB7; --ink-3:#6F7987;
  --line:#232A33; --line-strong:#2F3742;
  --accent:#4A78FF; --accent-hover:#6690FF; --accent-ink:#86A3FF; --on-accent:#FFFFFF; --accent-t:rgba(74,120,255,.16);
  --c2:#B9C4D6;
  --up:#3CC47C; --up-s:#2A9A59; --up-t:rgba(60,196,124,.15);
  --down:#F26868; --down-t:rgba(242,104,104,.14);
  --promo:linear-gradient(115deg,rgba(74,120,255,.16),rgba(150,110,255,.18));
  --shadow:0 0 0 1px rgba(255,255,255,.07),0 2px 8px rgba(0,0,0,.25);
  --shadow-h:0 0 0 1px rgba(255,255,255,.12),0 10px 26px -8px rgba(0,0,0,.6);
  --shadow-lg:0 0 0 1px rgba(255,255,255,.08),0 20px 48px -14px rgba(0,0,0,.7);
  color-scheme:dark;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.7 var(--f-body);-webkit-font-smoothing:antialiased;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
img,svg{max-width:100%}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;line-height:1.2;letter-spacing:-.02em;text-wrap:balance;margin:0;color:var(--ink)}
h1{font-size:clamp(36px,5vw,60px);line-height:1.1;letter-spacing:-.035em}
h2{font-size:clamp(26px,3.1vw,38px);line-height:1.16;letter-spacing:-.03em}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0}
ul,ol{margin:0;padding:0}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.mono{font-family:var(--f-mono)}
.num{font-variant-numeric:tabular-nums}
.eyebrow{font:600 13px/1.4 var(--f-body);letter-spacing:.02em;color:var(--accent-ink)}
.lead{font-size:18px;line-height:1.75;color:var(--ink-2);max-width:60ch}
.muted{color:var(--ink-3)}
.small{font-size:14px}
.stack{display:flex;flex-direction:column;gap:16px}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- announcement & header ---------- */
.announce{font-size:13.5px;line-height:1.5;background:var(--accent-t)!important}
.announce .wrap{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 10px;padding-block:9px;text-align:center}
.announce .pill{font:600 11.5px/1 var(--f-body);padding:5px 8px;border-radius:6px;background:var(--accent);color:var(--on-accent)}
.announce b{color:var(--ink);font-variant-numeric:tabular-nums}
.announce span{color:var(--ink-2)}
.announce a{color:var(--accent-ink);font-weight:600;text-decoration:none;margin-left:6px}
.announce a:hover{text-decoration:underline}

.hdr{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:var(--paper);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;gap:20px;min-height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.logo .zh{font:700 19px/1 var(--f-display);letter-spacing:-.01em;color:var(--ink)}
.logo .en{font:600 10.5px/1 var(--f-body);color:var(--ink-3);letter-spacing:.1em;text-transform:uppercase;margin-top:5px;display:block}
.logo-mark rect{fill:var(--ink);stroke:none}
.logo-mark polyline{fill:none;stroke:var(--paper);stroke-width:2.4;stroke-linejoin:round;stroke-linecap:round}
.logo-mark circle{fill:var(--accent)}
.nav{display:flex;align-items:center;gap:2px;flex:1;margin-left:16px}
.nav>a,.dd>a{display:block;padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink-2);font-weight:500;font-size:15px;white-space:nowrap;transition:color .15s,background .15s}
.nav>a:hover,.dd>a:hover{color:var(--ink);background:var(--surface-2)}
.nav a.active{color:var(--ink);font-weight:600}
.nav a.active::after{content:"";display:block;height:2px;border-radius:2px;background:var(--ink);margin-top:3px}
.dd{position:relative}
.dd>a::after{content:"";display:inline-block;width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-3px);margin-left:8px;opacity:.6}
.dd>a.active::after{display:inline-block;height:6px;background:none;border-radius:0;margin-top:0}
.dd-menu{position:absolute;top:100%;left:0;padding-top:8px;display:none;min-width:310px}
.dd-menu-in{background:var(--surface);border-radius:14px;box-shadow:var(--shadow-lg);padding:6px}
.dd:hover .dd-menu,.dd:focus-within .dd-menu{display:block}
.dd-menu a{display:flex;justify-content:space-between;gap:16px;align-items:baseline;padding:10px 12px;border-radius:8px;text-decoration:none;font-size:15px;color:var(--ink)}
.dd-menu a:hover{background:var(--surface-2)}
.dd-menu a small{font:600 13px/1 var(--f-body);color:var(--ink-2);font-variant-numeric:tabular-nums}
.tools{display:flex;align-items:center;gap:8px;flex:none}
.icon-btn{display:inline-grid;place-items:center;height:38px;min-width:38px;padding:0 10px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);cursor:pointer;font:600 13px/1 var(--f-body);color:var(--ink-2)}
.icon-btn:hover{background:var(--surface-2);color:var(--ink)}
.icon-btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.menu-btn{display:none}
@media (max-width:1040px){
  .menu-btn{display:inline-grid}
  .hdr .tools .btn{display:none}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;background:var(--paper);border-bottom:1px solid var(--line);padding:8px clamp(16px,4vw,40px) 16px;margin:0;max-height:calc(100vh - 110px);overflow:auto}
  .hdr.open .nav{display:flex}
  .nav a.active::after{display:none}
  .nav a.active{background:var(--surface-2)}
  .dd-menu{position:static;display:block;padding:0 0 0 12px;min-width:0}
  .dd-menu-in{box-shadow:none;background:transparent;padding:0}
  .dd>a::after{display:none}
  .tools{margin-left:auto}
}

/* ---------- buttons, chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px/1 var(--f-body);padding:13px 20px;border-radius:10px;border:1px solid transparent;cursor:pointer;text-decoration:none;white-space:nowrap;transition:background .15s,border-color .15s,transform .15s}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary[disabled]{opacity:.45;cursor:not-allowed}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:var(--surface)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-sm{padding:10px 14px;font-size:14px}
.btn-block{width:100%}
.link{color:var(--accent-ink);font-weight:600;text-decoration:none;display:inline-flex;gap:6px;align-items:center}
.link::after{content:"→";transition:transform .15s}
.link:hover::after{transform:translateX(3px)}
.chip{display:inline-flex;align-items:center;gap:6px;font:600 12px/1 var(--f-body);padding:6px 9px;border-radius:6px;background:var(--surface-2);color:var(--ink-2);white-space:nowrap;border:0}
.chip.sig{color:var(--accent-ink);background:var(--accent-t)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--up);display:inline-block;animation:pulse 1.8s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--up-t)}70%{box-shadow:0 0 0 6px transparent}100%{box-shadow:0 0 0 0 transparent}}
.tbd{display:inline;font:600 11.5px/1.4 var(--f-body);color:var(--ink-3);background:var(--surface-2);border:1px dashed var(--line-strong);border-radius:5px;padding:1px 6px;white-space:nowrap}

/* ---------- sections ---------- */
.sec{padding-block:clamp(64px,9vw,112px)}
.sec.tight{padding-block:clamp(44px,6vw,80px)}
.rule{border-top:1px solid var(--line)}
.soft{background:var(--soft)}
.band{background:var(--soft);color:var(--ink)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px 40px;align-items:end;margin-bottom:clamp(32px,4vw,48px)}
.sec-head .stack{gap:12px}
@media (max-width:720px){.sec-head{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border-radius:15px;box-shadow:var(--shadow);padding:clamp(20px,3vw,30px)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
@media (max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:680px){.grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}}

/* ---------- hero ---------- */
.hero{padding-block:clamp(56px,8vw,104px) clamp(64px,8vw,104px)}
.hero-glow,.band.hero{background:radial-gradient(900px 460px at 88% -10%,rgba(46,92,255,.10),transparent 70%),radial-gradient(600px 380px at 70% 10%,rgba(150,110,255,.08),transparent 70%),var(--paper)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(36px,5vw,64px);align-items:center}
@media (max-width:1100px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
.hero h1{margin-block:18px 20px;font-size:clamp(36px,4.2vw,54px)}
.hero h1 em{font-style:normal;color:var(--accent);white-space:nowrap}
.hero .row{margin-top:32px}
.trust{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:44px;padding-top:22px;border-top:1px solid var(--line)}
.trust div{font-size:13.5px;line-height:1.55;color:var(--ink-3)}
.trust b{display:block;color:var(--ink);font-weight:600;font-size:15px;margin-bottom:3px}
@media (max-width:560px){.trust{grid-template-columns:minmax(0,1fr)}}

/* ---------- chart card (Polymarket-style) ---------- */
.chart-card{background:var(--surface);border-radius:16px;padding:clamp(16px,2.4vw,22px);box-shadow:var(--shadow-lg);min-width:0}
.chart-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:flex-start}
.chart-title{font:700 20px/1.3 var(--f-display);letter-spacing:-.02em;color:var(--ink)}
.chart-sub{font:500 13px/1.5 var(--f-body);color:var(--ink-2)}
.chart-big{text-align:right;line-height:1.1}
.chart-big b{display:block;font:700 30px/1 var(--f-display);letter-spacing:-.03em;color:var(--up);font-variant-numeric:tabular-nums}
.chart-big span{font-size:12px;color:var(--ink-3)}
.legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;font-size:13px;color:var(--ink-2);margin:14px 0 2px;min-height:22px}
.lg{display:inline-flex;align-items:center;gap:6px;transition:opacity .15s}
.lg i{width:8px;height:8px;border-radius:50%}
.lg b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}
.lg.c1 i{background:var(--accent)} .lg.c2 i{background:var(--c2)}
.lg.dim{opacity:.35}
.lg-date{margin-left:auto;color:var(--ink-3);font-variant-numeric:tabular-nums}
svg.chart{display:block;width:100%;height:auto;overflow:visible;touch-action:pan-y}
.pm-grid{stroke:var(--line-strong);stroke-dasharray:1 5;stroke-linecap:round;stroke-width:1.2}
.pm-grid.zero{stroke:var(--ink-3);stroke-dasharray:3 4;stroke-width:1;opacity:.55}
.pm-ax{fill:var(--ink-3);font:500 11.5px var(--f-body);font-variant-numeric:tabular-nums}
.pm-line{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round;transition:opacity .2s}
.pm-line.c1{stroke:var(--accent)} .pm-line.c2{stroke:var(--c2)}
.pm-dot{stroke:var(--surface);stroke-width:2}
.pm-dot.c1,.pm-halo.c1,.pm-hdot.c1{fill:var(--accent)}
.pm-dot.c2,.pm-halo.c2,.pm-hdot.c2{fill:var(--c2)}
.pm-halo{opacity:.25;transform-box:fill-box;transform-origin:center;animation:halo 2s ease-out infinite}
@keyframes halo{0%{transform:scale(.6);opacity:.35}100%{transform:scale(2);opacity:0}}
.pm-lab{font:500 12px var(--f-body)} .pm-val{font:700 22px var(--f-display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.pm-lab.c1,.pm-val.c1{fill:var(--accent)} .pm-lab.c2,.pm-val.c2{fill:var(--c2)}
svg .dim{opacity:.16}
.pm-vline{stroke:var(--ink-3);stroke-width:1;stroke-dasharray:3 3}
.pm-date{fill:var(--ink-2);font:600 11.5px var(--f-body);font-variant-numeric:tabular-nums}
.pm-hdot{stroke:var(--surface);stroke-width:2}
.chart-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:6px}
.ranges{display:flex;gap:2px;flex-wrap:wrap}
.ranges button{border:0;background:transparent;padding:5px 9px;border-radius:6px;font:600 13px/1.2 var(--f-body);color:var(--ink-3);cursor:pointer}
.ranges button:hover{color:var(--ink)}
.ranges button[aria-pressed="true"]{background:var(--surface-2);color:var(--ink)}
.seg{display:inline-flex;border-radius:10px;padding:3px;gap:2px;background:var(--surface-2)}
.seg button{border:0;background:transparent;padding:6px 11px;border-radius:7px;cursor:pointer;font:600 13px/1 var(--f-body);color:var(--ink-2)}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(14,16,20,.14)}
.chart-note{font-size:14px;line-height:1.65;color:var(--ink-2);margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.chart-src{display:flex;justify-content:space-between;align-items:center;gap:12px;font:400 12px/1.5 var(--f-body);color:var(--ink-3);margin-top:8px}
.wm{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink-3);flex:none}
.wm svg{width:15px;height:15px}
.wm .logo-mark rect{fill:var(--ink-3)}
.wm .logo-mark polyline{stroke:var(--surface)}
.wm .logo-mark circle{fill:var(--surface)}

/* ---------- entrances, paths ---------- */
.doors{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.door{padding:26px;display:flex;flex-direction:column;gap:12px;border-radius:15px;background:var(--surface);box-shadow:var(--shadow);transition:box-shadow .15s}
.door:hover{box-shadow:var(--shadow-h)}
.door .k{font:600 12.5px/1 var(--f-body);color:var(--ink-3)}
.door .ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--accent-t);color:var(--accent-ink)}
.door .ic svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.door p{color:var(--ink-2);flex:1}
@media (max-width:860px){.doors{grid-template-columns:minmax(0,1fr)}}

.path{position:relative;display:flex;flex-direction:column;gap:18px;background:var(--surface);border-radius:16px;box-shadow:var(--shadow);padding:clamp(22px,3vw,32px)}
.path.feat{box-shadow:0 0 0 1.5px var(--accent),var(--shadow-lg);background:var(--surface)}
.path.feat::before{content:"推荐";position:absolute;top:-11px;left:24px;font:700 12px/1 var(--f-body);background:var(--accent);color:var(--on-accent);padding:6px 9px;border-radius:6px}
.path .who{font:500 13px/1.5 var(--f-body);color:var(--ink-3)}
.path h3{font-size:clamp(23px,2.5vw,28px)}
.path .sub{color:var(--ink-2);margin-top:-8px}
.path ul{list-style:none;display:flex;flex-direction:column;gap:10px;flex:1}
.ticks li{position:relative;padding-left:26px;line-height:1.6}
.ticks li::before{content:"";position:absolute;left:0;top:.3em;width:17px;height:17px;border-radius:50%;background:var(--up-t)}
.ticks li::after{content:"";position:absolute;left:6px;top:calc(.3em + 4px);width:4px;height:8px;border-right:1.8px solid var(--up);border-bottom:1.8px solid var(--up);transform:rotate(40deg)}
.crosses li{position:relative;padding-left:26px;line-height:1.6;color:var(--ink-2)}
.crosses li::before{content:"";position:absolute;left:0;top:.3em;width:17px;height:17px;border-radius:50%;background:var(--down-t)}
.crosses li::after{content:"×";position:absolute;left:4.5px;top:-.05em;font-size:14px;font-weight:700;color:var(--down)}
.price-line{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 12px;padding-top:18px;border-top:1px solid var(--line)}
.price{font:700 38px/1 var(--f-display);font-variant-numeric:tabular-nums;letter-spacing:-.035em;color:var(--ink)}
.price .cur{font-size:.5em;margin-right:3px;vertical-align:.55em;letter-spacing:0;font-weight:600}
.was{font:500 15px/1 var(--f-body);color:var(--ink-3);text-decoration:line-through;font-variant-numeric:tabular-nums}
.price-tag{font:600 12px/1 var(--f-body);color:var(--up);background:var(--up-t);padding:5px 8px;border-radius:6px}
.strip{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 24px;align-items:center;margin-top:24px;padding:18px 22px;background:var(--surface);box-shadow:var(--shadow);border-radius:15px}
.strip p{color:var(--ink-2)}

/* ---------- chain: signal -> order -> fill -> outcome ---------- */
.chain{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.link-step{position:relative;padding:22px;border-radius:15px;background:var(--surface);box-shadow:var(--shadow)}
.link-step .term{display:flex;align-items:baseline;gap:10px;margin-bottom:10px}
.link-step .term h3{font-size:24px}
.link-step .term span{font:600 12px/1 var(--f-body);color:var(--ink-3)}
.link-step p{color:var(--ink-2);font-size:15px}
.link-step .eg{margin-top:14px;font:400 12.5px/1.6 var(--f-code);color:var(--ink-2);background:var(--surface-2);padding:9px 11px;border-radius:8px}
.chain .link-step+.link-step::before{content:"";position:absolute;left:-13px;top:32px;width:10px;height:10px;border-top:1.8px solid var(--accent);border-right:1.8px solid var(--accent);transform:rotate(45deg)}
@media (max-width:960px){.chain{grid-template-columns:repeat(2,minmax(0,1fr))}.chain .link-step:nth-child(3)::before{display:none}}
@media (max-width:560px){.chain{grid-template-columns:minmax(0,1fr)}.chain .link-step+.link-step::before{display:none}}
.flat{box-shadow:none;border-radius:0;background:transparent;padding:18px 0}
.flat+.flat{border-top:1px solid var(--line)}

/* ---------- research list ---------- */
.feature-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feature{display:flex;flex-direction:column;gap:12px;padding:22px;text-decoration:none;border-radius:15px;background:var(--surface);box-shadow:var(--shadow);transition:box-shadow .15s}
.feature:hover{box-shadow:var(--shadow-h)}
.feature h3{font-size:18px;line-height:1.4}
.feature:hover h3{color:var(--accent-ink)}
.feature p{color:var(--ink-2);font-size:15px;flex:1}
.meta{display:flex;flex-wrap:wrap;gap:6px 14px;font:500 12.5px/1.4 var(--f-body);color:var(--ink-3)}
.cat{font:600 12.5px/1 var(--f-body);color:var(--accent-ink)}
@media (max-width:860px){.feature-list{grid-template-columns:minmax(0,1fr)}}

/* ---------- mock app ---------- */
.app{background:var(--surface);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden;color:var(--ink);min-width:0}
.app-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 16px;border-bottom:1px solid var(--line)}
.app-bar .t{font:600 13.5px/1 var(--f-body);display:flex;align-items:center;gap:10px}
.app-body{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:300px}
.app-side{border-right:1px solid var(--line);padding:16px;display:flex;flex-direction:column;gap:14px;font-size:13px;background:var(--soft)}
.app-side label,.app-side .lab{display:block;font:600 11.5px/1.3 var(--f-body);color:var(--ink-3);margin-bottom:6px}
.app-side .val{font:400 12.5px/1.4 var(--f-code);padding:8px 10px;border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}
.app-side select{width:100%;font:600 13px/1.4 var(--f-body);padding:8px 10px;border:1.5px solid var(--accent);border-radius:8px;background:var(--surface);color:var(--ink)}
.app-main{padding:16px;display:flex;flex-direction:column;gap:12px;min-width:0}
.kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.kpi{border-radius:10px;padding:10px 12px;background:var(--surface-2)}
.kpi .k{font:500 12px/1.2 var(--f-body);color:var(--ink-3)}
.kpi .v{font:700 19px/1.3 var(--f-display);letter-spacing:-.02em;font-variant-numeric:tabular-nums;margin-top:4px}
.kpi .v.neg{color:var(--down)}
.app-note{font-size:13.5px;color:var(--ink-2);display:flex;gap:8px}
.app-note::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:8px}
@media (max-width:760px){.app-body{grid-template-columns:minmax(0,1fr)}.app-side{border-right:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.kpis{grid-template-columns:repeat(2,minmax(0,1fr))}}
.play{display:flex;align-items:center;gap:12px;margin-top:20px;font-size:14px;color:var(--ink-3)}
.play i{width:42px;height:42px;border-radius:50%;background:var(--surface);box-shadow:var(--shadow);display:grid;place-items:center;flex:none}
.play i::after{content:"";border-left:10px solid var(--accent);border-top:6px solid transparent;border-bottom:6px solid transparent;margin-left:3px}

/* ---------- founder / facts ---------- */
.founder{display:grid;grid-template-columns:200px minmax(0,1fr);gap:32px;align-items:start}
.portrait{aspect-ratio:4/5;max-width:100%;border-radius:15px;display:flex;flex-direction:column;justify-content:space-between;padding:18px;background:linear-gradient(140deg,#1F2C4A,#2E5CFF)!important}
.portrait b{font:700 56px/1 var(--f-display);color:#FFFFFF}
.portrait span{font:500 11.5px/1.4 var(--f-body);color:rgba(255,255,255,.75)}
@media (max-width:640px){.founder{grid-template-columns:minmax(0,1fr)}.portrait{max-width:200px}}
.facts{display:grid;grid-template-columns:max-content minmax(0,1fr);gap:0;border-top:1px solid var(--line)}
.facts dt,.facts dd{margin:0;padding:13px 0;border-bottom:1px solid var(--line)}
.facts dt{font:500 14px/1.6 var(--f-body);color:var(--ink-3);padding-right:28px}
.facts dd{font-size:15px}

/* ---------- forms ---------- */
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font:600 13px/1.3 var(--f-body);color:var(--ink-2)}
input[type=text],input[type=email],select,textarea{font:400 15px/1.4 var(--f-body);padding:12px 14px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);color:var(--ink);width:100%;min-width:0;transition:border-color .15s,box-shadow .15s}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-t)}
.inline-form{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) auto;gap:10px;align-items:end}
@media (max-width:720px){.inline-form{grid-template-columns:minmax(0,1fr)}}
.ok{display:flex;gap:10px;align-items:flex-start;padding:13px 15px;border-radius:10px;background:var(--up-t);color:var(--ink);font-size:14px}
.ok::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--up);margin-top:7px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-2)}
.check input{margin-top:4px;accent-color:var(--accent)}

/* ---------- page headers & course detail ---------- */
.page-head{padding-block:clamp(44px,6vw,80px) clamp(32px,4vw,52px);border-bottom:1px solid var(--line);background:radial-gradient(800px 360px at 90% -20%,rgba(46,92,255,.08),transparent 70%),var(--paper)}
.page-head h1{margin-block:14px 16px}
.crumb{font:500 13.5px/1.4 var(--f-body);color:var(--ink-3)}
.crumb a{text-decoration:none;color:var(--ink-2)}
.crumb a:hover{color:var(--accent-ink)}
.keyfacts{display:flex;flex-wrap:wrap;gap:0;margin-top:30px;border-radius:15px;background:var(--surface);box-shadow:var(--shadow)}
.keyfacts div{padding:14px 20px;flex:1 1 160px;min-width:0}
.keyfacts div+div{border-left:1px solid var(--line)}
.keyfacts .k{font:500 12.5px/1.3 var(--f-body);color:var(--ink-3)}
.keyfacts .v{font-weight:600;margin-top:4px}
@media (max-width:640px){.keyfacts div+div{border-left:0;border-top:1px solid var(--line)}.keyfacts div{flex-basis:100%}}
.detail{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:clamp(32px,5vw,64px);align-items:start}
@media (max-width:980px){.detail{grid-template-columns:minmax(0,1fr)}.detail .buy{order:-1;position:static}}
.blk{padding-block:clamp(32px,4vw,44px);border-bottom:1px solid var(--line)}
.blk:last-child{border-bottom:0}
.blk>h2{font-size:clamp(23px,2.4vw,28px);margin-bottom:20px}
.blk>p+p{margin-top:12px}
.buy{position:sticky;top:calc(env(safe-area-inset-top,0px) + 88px);margin-top:clamp(32px,4vw,44px)}
.buy .card{display:flex;flex-direction:column;gap:16px;box-shadow:var(--shadow-lg);border-radius:16px}
.buy .tier{font:600 13px/1.4 var(--f-body);color:var(--up)}
.buy ul{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:14.5px}
.seats{display:grid;grid-template-columns:repeat(15,1fr);gap:3px}
.seats i{height:10px;border-radius:3px;background:var(--accent-t)}
.count{display:flex;align-items:baseline;gap:8px;font-size:14px;color:var(--ink-2)}
.count b{font:700 28px/1 var(--f-display);letter-spacing:-.03em;color:var(--accent);font-variant-numeric:tabular-nums}
.two-col-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.two-col-list h4{margin-bottom:14px}
.two-col-list ul{list-style:none;display:flex;flex-direction:column;gap:10px}
@media (max-width:640px){.two-col-list{grid-template-columns:minmax(0,1fr)}}
.steps{list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:0}
.steps li{counter-increment:s;display:grid;grid-template-columns:38px minmax(0,1fr);gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
.steps li:last-child{border-bottom:0}
.steps li::before{content:counter(s);width:26px;height:26px;border-radius:50%;background:var(--surface-2);display:grid;place-items:center;font:700 12.5px/1 var(--f-body);color:var(--ink-2)}
.steps b{display:block}
.steps span{color:var(--ink-2);font-size:15px}

/* weekly report sample */
.report{background:var(--surface);box-shadow:var(--shadow-lg);border-radius:10px;padding:24px;max-width:460px;position:relative}
.report::after{content:"样本";position:absolute;top:14px;right:14px;font:600 11.5px/1 var(--f-body);color:var(--accent-ink);background:var(--accent-t);padding:5px 7px;border-radius:6px}
.report .rh{display:flex;justify-content:space-between;gap:12px;border-bottom:2px solid var(--ink);padding-bottom:10px;margin-bottom:14px;padding-right:48px}
.report .rh b{font:700 16px/1.3 var(--f-display)}
.report .no{font:500 12px/1.6 var(--f-body);color:var(--ink-3);font-variant-numeric:tabular-nums}
.report h5{font:600 13px/1.4 var(--f-body);margin:14px 0 6px;display:flex;gap:8px}
.report h5 span{color:var(--accent-ink);font-variant-numeric:tabular-nums}
.report p{font-size:13px;line-height:1.65;color:var(--ink-2)}
.report .bar{height:6px;background:var(--surface-2);border-radius:3px;margin:5px 0}
.sigrow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin-top:6px}
.sigrow div{font:400 11.5px/1.4 var(--f-body);background:var(--surface-2);padding:6px 8px;border-radius:6px;color:var(--ink-3)}
.sigrow div b{display:block;font-weight:600;color:var(--ink)}

/* week rhythm */
.week{display:grid;grid-template-columns:repeat(7,minmax(92px,1fr));border-radius:14px;background:var(--surface);box-shadow:var(--shadow);min-width:660px;overflow:hidden}
.week>div{padding:12px;min-height:118px;display:flex;flex-direction:column;gap:8px}
.week>div+div{border-left:1px solid var(--line)}
.week .d{font:600 12.5px/1 var(--f-body);color:var(--ink-3)}
.week .ev{font-size:13px;line-height:1.45;padding:7px 9px;border-radius:7px;background:var(--surface-2)}
.week .ev.hot{background:var(--accent);color:var(--on-accent)}
.scroll-x{overflow-x:auto;padding:2px}

/* tables */
.tbl-wrap{overflow-x:auto;border-radius:15px;background:var(--surface);box-shadow:var(--shadow)}
.tbl{width:100%;border-collapse:collapse;font-size:15px;min-width:640px}
.tbl th,.tbl td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.6}
.tbl tr:last-child td,.tbl tr:last-child th{border-bottom:0}
.tbl thead th{font:600 13.5px/1.4 var(--f-body);color:var(--ink-2);background:var(--soft)}
.tbl tbody th{font:500 13.5px/1.6 var(--f-body);color:var(--ink-3);white-space:nowrap;width:1%}
.tbl .hl{background:var(--accent-t)}
.tbl thead .hl{color:var(--accent-ink)}
.tbl .num{white-space:nowrap;font-weight:600}
.syl td:first-child{white-space:nowrap;font-size:13.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:18px 36px 18px 0;font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:14px;font:400 22px/1 var(--f-body);color:var(--ink-3);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 20px;color:var(--ink-2);max-width:70ch}

/* quiz: yes / no style options */
.quiz{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:28px;align-items:start}
@media (max-width:860px){.quiz{grid-template-columns:minmax(0,1fr)}}
.q{padding:16px 0;border-bottom:1px solid var(--line)}
.q:first-child{padding-top:0}
.q p{font-weight:600;margin-bottom:10px}
.q .opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.opt{border:0;border-radius:10px;padding:11px 14px;cursor:pointer;font-size:14.5px;font-weight:600;text-align:center;transition:background .15s,color .15s}
.q .opt{background:var(--surface-2);color:var(--ink-2)}
.q .opt:hover{background:var(--line-strong);color:var(--ink)}
.q .opt[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.result{position:sticky;top:96px;border-radius:16px;padding:26px;display:flex;flex-direction:column;gap:14px;background:var(--promo),var(--surface)!important;box-shadow:var(--shadow)}
.result .progress{height:4px;background:var(--line-strong);border-radius:2px;overflow:hidden}
.result .progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .3s}
.result p{color:var(--ink-2);font-size:15px}
.result h3{font-size:26px}

/* research */
.filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:28px}
.filters button{border:0;background:transparent;border-radius:8px;padding:8px 13px;cursor:pointer;font:500 14.5px/1.2 var(--f-body);color:var(--ink-2)}
.filters button:hover{background:var(--surface-2);color:var(--ink)}
.filters button[aria-pressed="true"]{background:var(--accent-t);color:var(--accent-ink);font-weight:600}
.posts{border-top:1px solid var(--line)}
.post{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:8px 28px;padding:22px 0;border-bottom:1px solid var(--line);text-decoration:none;align-items:baseline}
.post h3{font-size:19px;line-height:1.4}
.post p{color:var(--ink-2);font-size:15px;margin-top:6px}
.post:hover h3{color:var(--accent-ink)}
.post .side{font:500 13px/1.6 var(--f-body);color:var(--ink-3);text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
@media (max-width:720px){.post{grid-template-columns:minmax(0,1fr)}.post .side{text-align:left}}
.archive{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
@media (max-width:860px){.archive{grid-template-columns:minmax(0,1fr)}}
.arch{border-radius:15px;background:var(--surface);box-shadow:var(--shadow);padding:18px}
.arch .yr{font:600 13.5px/1 var(--f-body);color:var(--ink-3);margin-bottom:12px}
.arch ul{list-style:none;display:flex;flex-direction:column}
.arch li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-top:1px solid var(--line);font-size:14.5px}
.arch li span:last-child{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.url{font:400 13px/1.6 var(--f-code);background:var(--surface-2);padding:2px 8px;border-radius:6px;overflow-wrap:anywhere}

/* article */
.article{display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(32px,5vw,64px);align-items:start}
@media (max-width:900px){.article{grid-template-columns:minmax(0,1fr)}.toc{position:static!important}}
.toc{position:sticky;top:96px;display:flex;flex-direction:column;gap:2px;font-size:14px}
.toc .k{font:600 12.5px/1 var(--f-body);color:var(--ink-3);margin-bottom:10px}
.toc button{border:0;background:transparent;text-align:left;padding:7px 10px;border-radius:8px;cursor:pointer;color:var(--ink-2);font-size:14px}
.toc button:hover{color:var(--ink);background:var(--surface-2)}
.prose{max-width:70ch}
.prose h2{font-size:clamp(22px,2.4vw,26px);margin:44px 0 14px}
.prose p{margin-top:14px;color:var(--ink)}
.prose ol{padding-left:22px;display:flex;flex-direction:column;gap:10px;margin-top:14px}
.tldr{background:var(--accent-t);padding:18px 22px;border-radius:14px;margin-top:28px}
.tldr .k{font:700 12.5px/1 var(--f-body);letter-spacing:.04em;color:var(--accent-ink);margin-bottom:8px;display:block}
.define{padding:16px 20px;border-radius:12px;background:var(--surface-2);margin-top:16px}
.byline{display:flex;flex-wrap:wrap;gap:6px 18px;font:500 13.5px/1.5 var(--f-body);color:var(--ink-3);margin-top:16px}
.byline a{color:var(--ink-2)}
.refs{font-size:14px;color:var(--ink-2);display:flex;flex-direction:column;gap:8px;padding-left:18px;margin-top:12px}
.disclaim{font-size:13.5px;color:var(--ink-3);border-top:1px solid var(--line);padding-top:16px;margin-top:36px}

/* newsletter */
.bill{display:inline-flex;align-items:center;gap:10px;font-size:14px}
.plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
@media (max-width:760px){.plans{grid-template-columns:minmax(0,1fr)}}
.plan{display:flex;flex-direction:column;gap:16px}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:10px;flex:1}
.plan.pick{box-shadow:0 0 0 1.5px var(--accent),var(--shadow)}
.meter{height:8px;background:var(--surface-2);border-radius:4px;overflow:hidden}
.meter i{display:block;height:100%;background:var(--accent)}
.phone{width:290px;max-width:100%;border:10px solid var(--ink);border-radius:36px;background:var(--paper);padding:26px 18px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-lg);margin-inline:auto}
.phone .av{width:64px;height:64px;border-radius:50%;background:linear-gradient(140deg,#1F2C4A,#2E5CFF);color:#FFFFFF;display:grid;place-items:center;font:700 22px/1 var(--f-display);margin-inline:auto}
.phone .nm{text-align:center;font-weight:600}
.phone .bio{text-align:center;font-size:13px;color:var(--ink-2);margin-bottom:6px}
.phone a{display:block;text-align:center;padding:12px;border-radius:10px;box-shadow:var(--shadow);background:var(--surface);text-decoration:none;font-size:14px;font-weight:600}
.phone a.p{background:var(--accent);color:var(--on-accent);box-shadow:none}

/* contact */
.socials{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}
@media (max-width:720px){.socials{grid-template-columns:minmax(0,1fr)}}
.soc{display:grid;grid-template-columns:118px minmax(0,1fr);gap:4px 16px;padding:14px 0;border-bottom:1px solid var(--line)}
.soc b{font-weight:600}
.soc .h{font:500 13.5px/1.6 var(--f-body);color:var(--ink-3)}
.soc p{font-size:14px;color:var(--ink-2);grid-column:2}
.mail{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font:700 20px/1.4 var(--f-display);letter-spacing:-.01em}
.mail span{user-select:all}

/* legal docs */
.doc{max-width:72ch}
.doc h2{font-size:21px;margin:36px 0 10px}
.doc p,.doc li{color:var(--ink-2)}
.doc ul{padding-left:20px;display:flex;flex-direction:column;gap:8px}

/* footer */
.ftr{padding-block:56px 32px;font-size:14px;background:var(--paper)!important;border-top:1px solid var(--line)}
.ftr-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(4,minmax(0,1fr));gap:32px}
@media (max-width:900px){.ftr-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.ftr-grid>div:first-child{grid-column:1/-1}}
.ftr h4{font:700 14px/1 var(--f-body);color:var(--ink);margin-bottom:16px}
.ftr ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.ftr a{text-decoration:none;color:var(--ink-2)}
.ftr a:hover{color:var(--ink)}
.ftr p{color:var(--ink-2)}
.ftr-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;font:500 12.5px/1.6 var(--f-body);color:var(--ink-3)}
.risk-line{margin-top:22px;max-width:86ch;line-height:1.7;font-size:13px;color:var(--ink-3)!important}

/* modal */
.modal{position:fixed;inset:0;z-index:60;background:rgba(14,16,20,.45);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:grid;place-items:center;padding:16px}
.modal-box{background:var(--surface);color:var(--ink);width:100%;max-width:520px;max-height:calc(100% - 32px);overflow:auto;border-radius:18px;box-shadow:var(--shadow-lg)}
.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:22px 24px;border-bottom:1px solid var(--line)}
.modal-body{padding:22px 24px;display:flex;flex-direction:column;gap:16px}
.sum{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 16px;font-size:15px}
.sum .r{text-align:right;font-variant-numeric:tabular-nums;font-weight:600}
.sum .tot{border-top:1px solid var(--line);padding-top:10px;font-weight:600}
.sum .tot.r{font:700 24px/1.2 var(--f-display);letter-spacing:-.02em}
.pay{display:flex;flex-wrap:wrap;gap:8px}
.pay label{display:flex;align-items:center;gap:8px;border:1px solid var(--line-strong);border-radius:10px;padding:9px 12px;font-size:14px;cursor:pointer}
.pay input{accent-color:var(--accent)}

/* feedback */
.toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:70;background:var(--ink);color:var(--paper);padding:12px 16px;border-radius:10px;font-size:14px;font-weight:500;max-width:calc(100% - 32px);box-shadow:var(--shadow-lg)}
.page{animation:fade .2s ease-out}
@keyframes fade{from{opacity:.5}to{opacity:1}}
.chart-card.mono,.chart-card.mono pre{font-family:var(--f-code)}