/* KOL Hub v3 — 按 awesome-design-md / design-md/apple/DESIGN.md 的令牌重做
   颜色：Action Blue #0066cc（唯一交互色）、Focus #0071e3、暗面链接 #2997ff、
   墨色 #1d1d1f、画布白 #ffffff、羊皮纸 #f5f5f7、珍珠 #fafafc、暗砖 #272729/#2a2a2c/#252527、纯黑 #000000、发丝线 #e0e0e0
   字体：SF Pro Display（标题）+ SF Pro Text（正文），正文 17px/1.47/-0.374px，标题 600 不用 700，500 不用
   圆角：工具按钮 8px、卡片 18px、主按钮/搜索/芯片全 pill；无装饰渐变，卡片/按钮无阴影（阴影只留给产品图，本站无产品图故不用） */
*{box-sizing:border-box}
:root{--blue:#0066cc;--blue-focus:#0071e3;--blue-dark:#2997ff;--ink:#1d1d1f;--ink80:#333;--ink48:#7a7a7a;--muted-dark:#ccc;--hairline:#e0e0e0;--divider:#f0f0f0;--canvas:#fff;--parchment:#f5f5f7;--pearl:#fafafc;--tile1:#272729;--tile2:#2a2a2c;--tile3:#252527;--black:#000;--chip:rgba(210,210,215,.64);--green:#248a3d;--red:#d70015}
html{scroll-behavior:smooth}
body{margin:0;font-family:"SF Pro Text",system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--parchment);color:var(--ink);font-size:17px;line-height:1.47;letter-spacing:-.374px;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
h1,h2,h3{font-family:"SF Pro Display",system-ui,-apple-system,sans-serif}
/* global-nav：纯黑 44px，12px 导航字 */
.topbar{position:sticky;top:0;z-index:60;background:var(--black);color:#fff}
.topbar-in{max-width:1440px;margin:0 auto;padding:0 24px;height:44px;display:flex;align-items:center;gap:24px}
.topnav{display:flex;gap:24px;margin-left:12px}
.topnav button{border:0;background:transparent;padding:0;color:#fff;font-size:12px;line-height:1;letter-spacing:-.12px;cursor:pointer;white-space:nowrap}
.topnav button.on{color:#fff;font-weight:600}
.topnav button:active{transform:scale(.95)}
/* sub-nav-frosted：羊皮纸 80% + blur，52px，左 21px 分类名，右工具 */
.subnav{position:sticky;top:44px;z-index:50;background:rgba(245,245,247,.8);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.subnav-in{max-width:1440px;margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;gap:16px}
.brand-name{font-family:"SF Pro Display",system-ui,-apple-system,sans-serif;font-size:21px;font-weight:600;line-height:1.19;letter-spacing:.231px;white-space:nowrap}
.role-switch{display:flex;gap:8px;margin-left:auto}
.role-switch button{border:1px solid var(--hairline);background:var(--pearl);color:var(--ink80);padding:8px 14px;border-radius:11px;font-size:14px;line-height:1.29;letter-spacing:-.224px;cursor:pointer}
.role-switch button.on{border:2px solid var(--blue-focus);background:var(--canvas);font-weight:600}
.role-switch button:active,.btn:active{transform:scale(.95)}
.bell{position:relative;border:0;background:var(--chip);border-radius:50%;width:44px;height:44px;font-size:17px;cursor:pointer;flex-shrink:0}
.bell i{position:absolute;top:-2px;right:-2px;background:var(--red);color:#fff;font-style:normal;font-size:11px;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 4px}
.wrap{max-width:1440px;margin:0 auto;padding:0 24px 80px}
.wrap-narrow{max-width:980px;margin:0 auto}
/* hero tile：白底，80px 上下留白 */
.hero{text-align:center;padding:80px 24px;background:var(--canvas)}
.hero h1{font-size:56px;font-weight:600;line-height:1.07;letter-spacing:-.28px;margin:24px 0}
.hero p{font-size:24px;font-weight:300;line-height:1.5;max-width:980px;margin:0 auto;color:var(--ink)}
.pill{display:inline-block;background:var(--pearl);border:1px solid var(--divider);border-radius:11px;padding:8px 14px;font-size:14px;line-height:1.29;letter-spacing:-.224px;font-weight:600}
.cta{display:flex;gap:12px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.btn{border:0;border-radius:9999px;padding:11px 22px;font-size:17px;line-height:1.47;letter-spacing:-.374px;cursor:pointer;font-weight:400}
.btn:focus-visible{outline:2px solid var(--blue-focus);outline-offset:2px}
.btn-primary{background:var(--blue);color:#fff}
.btn-store{padding:14px 28px;font-size:18px;font-weight:300;line-height:1}
.btn-dark{background:var(--ink);color:#fff;border-radius:8px;padding:8px 15px;font-size:14px;line-height:1.29;letter-spacing:-.224px}
.btn-light{background:var(--canvas);color:var(--blue);border:1px solid var(--blue)}
.btn-small{padding:8px 15px;font-size:14px;line-height:1.29;letter-spacing:-.224px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.demo-note{margin:32px auto 0;max-width:980px;background:var(--pearl);border:1px solid var(--hairline);border-radius:18px;padding:24px;font-size:14px;line-height:1.43;letter-spacing:-.224px;text-align:left;color:var(--ink80)}
/* alternating tiles：白 / 羊皮纸 / 暗砖，颜色变化本身就是分隔 */
.section{padding:80px 0}
.section h2{font-size:40px;font-weight:600;line-height:1.1;letter-spacing:0;margin:0 0 12px}
.section .sub{font-size:17px;line-height:1.47;color:var(--ink80)}
.section-dark{background:var(--tile1);color:#fff}
.section-dark .sub{color:var(--muted-dark)}
.section-dark a{color:var(--blue-dark)}
.section-dark .card{background:var(--tile2);border-color:#3a3a3c;color:#fff}
.section-dark .card p{color:var(--muted-dark)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}
.card{background:var(--canvas);border:1px solid var(--hairline);border-radius:18px;padding:24px}
.card h3{margin:8px 0;font-size:21px;font-weight:600;line-height:1.19;letter-spacing:.231px}
.card p{font-size:17px;line-height:1.47;margin:8px 0}
.card p.muted,.muted{color:var(--ink48);font-size:14px;line-height:1.43;letter-spacing:-.224px}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.tag{background:var(--canvas);border:1px solid var(--hairline);border-radius:9999px;padding:12px 16px;font-size:14px;line-height:1.29;letter-spacing:-.224px}
.tag.blue{border:2px solid var(--blue-focus);color:var(--blue);font-weight:600}
.tag.green{color:var(--green);font-weight:600}
.tag.red{color:var(--red);font-weight:600}
.reward{font-size:28px;font-weight:400;line-height:1.14;letter-spacing:.196px;margin-top:12px}
.reward small{font-size:14px;line-height:1.43;letter-spacing:-.224px;color:var(--ink48);font-weight:400}
form label{display:block;font-size:14px;font-weight:600;line-height:1.29;letter-spacing:-.224px;margin:17px 0 8px}
input,select,textarea{width:100%;padding:12px 20px;border:1px solid rgba(0,0,0,.08);border-radius:11px;font-size:17px;line-height:1.47;letter-spacing:-.374px;background:var(--canvas);font-family:inherit;color:var(--ink);min-height:44px}
textarea{min-height:80px;resize:vertical;border-radius:18px}
input[type=range]{padding:0;min-height:auto}
input[type=checkbox]{width:auto;min-height:auto}
.search-pill{border-radius:9999px;height:44px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.check{display:flex;gap:8px;align-items:flex-start;font-size:14px;line-height:1.43;letter-spacing:-.224px}
.check input{margin-top:3px}
.notice{background:var(--canvas);border:1px solid var(--hairline);border-radius:18px;padding:24px;font-size:14px;line-height:1.43;letter-spacing:-.224px;margin-top:12px}
.notice b{color:var(--ink)}
.ok{color:var(--green);font-weight:600}
.bad{color:var(--red);font-weight:600}
.step{display:flex;gap:12px;margin-top:12px}
.step n{width:28px;height:28px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0}
.view{display:none}
.view.on{display:block}
.kol-head{display:flex;gap:12px;align-items:center}
.avatar{width:52px;height:52px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:21px;font-weight:600;flex-shrink:0}
.footer{background:var(--parchment);color:var(--ink80);font-size:12px;line-height:1;letter-spacing:-.12px;padding:64px 24px}
.footer-in{max-width:1440px;margin:0 auto}
.footer-in a{line-height:2.41;font-size:17px}
.bottomnav{display:none}
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 20px;border-radius:18px;font-size:14px;line-height:1.43;letter-spacing:-.224px;z-index:99;max-width:92vw;text-align:center}
/* 响应：1068 小桌面、833 平板横、640 手机、419 小手机（按 DESIGN.md 断点） */
@media(max-width:1068px){.hero h1{font-size:40px}.section h2{font-size:40px}.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:833px){.topnav{display:none}.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){
  .hero{padding:48px 16px}.hero h1{font-size:34px}.hero p{font-size:21px;font-weight:600;line-height:1.19;letter-spacing:.231px}
  .section{padding:48px 0}.section h2{font-size:34px}
  .grid{grid-template-columns:1fr}.row2,.row3{grid-template-columns:1fr}
  .wrap{padding:0 16px 130px}
  .bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:50;background:rgba(245,245,247,.8);backdrop-filter:saturate(180%) blur(20px);border-top:1px solid rgba(0,0,0,.08);display:flex;padding:8px 6px calc(8px + env(safe-area-inset-bottom))}
  .bottomnav button{flex:1;border:0;background:transparent;font-size:12px;line-height:1;letter-spacing:-.12px;color:var(--ink48);cursor:pointer;padding:4px 2px}
  .bottomnav button.on{color:var(--blue);font-weight:600}
  .bottomnav b{display:block;font-size:21px}
}
@media(max-width:419px){.hero h1{font-size:28px}}