/* ============================================================
   DataHunter 官网 Design System  v2  (2026-05-24)
   设计原则：克制、留白、规整层级、绿色为主辅色点缀（参考 Stripe/Linear 精致度）
   ============================================================ */
:root{
  /* 品牌官方令牌 */
  --brand:#23AB60; --brand-d:#1B8A4D; --brand-l:#6FD998;
  --purple:#6C68CE; --blue:#526CA0; --orange:#F4A935;
  --ink-1:#0B0F14; --ink-2:#595959; --ink-3:#9AA3AD; --ink-4:#BFBFBF;

  /* 中性面 */
  --surface:#FFFFFF; --surf-2:#F7F9FB; --surf-3:#EEF3F1;
  --line:#EAEEF2; --line-2:#E1E6EC;
  --navy:#0B1220; --navy-2:#121A2B;
  --brand-50:#ECF8F1; --brand-100:#D9F0E3;

  /* 排版令牌（模块化，base 17px） */
  --font-cjk:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --font-en:"Sora","Outfit",-apple-system,"Segoe UI",var(--font-cjk);
  --fs-xs:.8125rem;  /* 13 标签/eyebrow */
  --fs-sm:.9375rem;  /* 15 次要/meta   */
  --fs-base:1.0625rem;/*17 正文        */
  --fs-md:1.1875rem; /* 19 lead        */
  --fs-h3:1.375rem;  /* 22            */
  --fs-h2:clamp(1.75rem,1.1rem + 2.4vw,2.375rem); /* 28→38 */
  --fs-display:clamp(2.4rem,1.4rem + 4.2vw,3.75rem);/* 38→60 */
  --lh-tight:1.15; --lh-snug:1.3; --lh-body:1.7;

  /* 间距(8pt)/形状/阴影 */
  --sp-section:clamp(52px,6vw,84px);
  --maxw:1180px; --r-sm:8px; --r:12px; --r-lg:18px; --r-xl:24px;
  --sh-sm:0 1px 2px rgba(11,18,32,.05);
  --sh:0 4px 16px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh-lg:0 24px 50px -12px rgba(11,18,32,.16),0 6px 16px rgba(11,18,32,.05);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-cjk);color:var(--ink-1);background:var(--surface);
  font-size:var(--fs-base);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
img,svg{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:3px}
h1,h2,h3,h4{letter-spacing:-.022em;font-weight:700;color:var(--ink-1)}
.en{font-family:var(--font-en)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* 文字工具 */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:var(--fs-sm);font-weight:600;
  letter-spacing:.04em;color:var(--brand-d)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--brand);border-radius:2px}
.lead{font-size:var(--fs-md);color:var(--ink-2);line-height:1.6}
.section{padding:var(--sp-section) 0}
.s-head{max-width:680px;margin:0 auto var(--sp-h,42px);text-align:center}
.s-head.left{margin-left:0;text-align:left}
.s-head h2{font-size:var(--fs-h2);line-height:var(--lh-snug);margin:16px 0 14px}
.s-head p{font-size:var(--fs-md);color:var(--ink-2);line-height:1.6}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;
  border-radius:999px;font-weight:600;font-size:var(--fs-sm);cursor:pointer;border:1px solid transparent;
  transition:all .22s var(--ease);white-space:nowrap}
.btn-sm{height:40px;padding:0 18px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(35,171,96,.25)}
.btn-primary:hover{background:var(--brand-d);transform:translateY(-1px);box-shadow:0 10px 24px rgba(35,171,96,.32)}
.btn-ghost{border-color:var(--line-2);color:var(--ink-1);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-50)}
.btn-on-dark{background:#fff;color:var(--ink-1)}
.btn-on-dark:hover{transform:translateY(-1px)}
.btn svg{width:16px;height:16px}
.lnk{display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-sm);font-weight:600;color:var(--brand-d)}
.lnk svg{width:14px;height:14px;transition:transform .2s var(--ease)}
.lnk:hover svg{transform:translateX(3px)}

/* ============================================================ HEADER */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:36px;height:74px}
.brand{display:flex;align-items:center;flex:none}
.brand img{height:30px;width:auto}
.nav-menu{display:flex;gap:2px;flex:1;list-style:none}
.nav-item{position:relative}
.nav-item>a{display:inline-flex;align-items:center;gap:5px;padding:9px 14px;border-radius:9px;
  font-size:var(--fs-sm);color:var(--ink-1);font-weight:500}
.nav-item>a:hover{color:var(--brand-d);background:var(--brand-50)}
.nav-item>a .chev{width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);opacity:.45}
.mega{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(8px);
  background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-lg);
  padding:12px;min-width:540px;opacity:0;visibility:hidden;transition:all .2s var(--ease)}
.nav-item:hover .mega{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.mega a{display:flex;gap:13px;padding:12px;border-radius:11px;align-items:center}
.mega a:hover{background:var(--surf-2)}
.mega .ic{width:38px;height:38px;border-radius:10px;flex:none;display:grid;place-items:center;
  background:var(--brand-50);color:var(--brand-d)}
.mega .ic svg{width:20px;height:20px}
.mega a>span:last-child{display:flex;flex-direction:column;min-width:0}
.mega .tt{display:block;font-weight:600;font-size:var(--fs-sm);color:var(--ink-1);line-height:1.3}
.mega .ds{display:block;font-size:var(--fs-xs);color:var(--ink-2);margin-top:3px;line-height:1.4}
.nav-cta{display:flex;align-items:center;gap:16px;flex:none}
.nav-tel{font-family:var(--font-en);font-weight:700;color:var(--brand-d);font-size:var(--fs-sm);letter-spacing:.01em}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:10px}
.nav-toggle span{width:22px;height:2px;background:var(--ink-1);border-radius:2px;transition:.25s}

/* ============================================================ HERO */
.hero{position:relative;padding:clamp(64px,8vw,104px) 0 clamp(72px,9vw,112px);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;
  background:radial-gradient(820px 460px at 82% -10%,rgba(35,171,96,.08),transparent 62%)}
.hero::after{content:"";position:absolute;inset:0 0 auto;height:100%;z-index:-1;opacity:.55;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:40px 40px;-webkit-mask-image:radial-gradient(ellipse 70% 55% at 30% 10%,#000,transparent 70%)}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:60px;align-items:center}
.hero h1{font-size:var(--fs-display);line-height:var(--lh-tight);margin:20px 0 22px;letter-spacing:-.035em;font-weight:800}
.hero h1 .hl{color:var(--brand)}
.hero .lead{max-width:520px}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-trust{margin-top:44px;display:flex;gap:40px;flex-wrap:wrap}
.hero-trust .n{font-family:var(--font-en);font-size:1.9rem;font-weight:800;letter-spacing:-.03em;line-height:1}
.hero-trust .l{font-size:var(--fs-xs);color:var(--ink-2);margin-top:7px}

/* hero 右侧：干净的浅色分析卡（Stripe风） */
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--sh-lg);
  padding:22px;position:relative}
.panel::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;
  background:linear-gradient(160deg,rgba(35,171,96,.4),transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.panel-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.panel-hd .t{font-weight:600;font-size:var(--fs-sm)}
.panel-hd .pill{font-size:var(--fs-xs);color:var(--brand-d);background:var(--brand-50);padding:4px 10px;border-radius:999px;font-weight:600}
.panel .kpi{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}
.panel .kpi .v{font-family:var(--font-en);font-size:2rem;font-weight:800;letter-spacing:-.03em}
.panel .kpi .up{font-size:var(--fs-sm);color:var(--brand);font-weight:700}
.panel .chart{height:118px;margin:6px 0 16px}
.panel .row{display:flex;gap:12px}
.panel .mini{flex:1;background:var(--surf-2);border-radius:12px;padding:12px 14px}
.panel .mini .l{font-size:var(--fs-xs);color:var(--ink-2)}
.panel .mini .v{font-family:var(--font-en);font-weight:700;font-size:1.15rem;margin-top:3px}
.panel .mini .v small{color:var(--brand);font-size:.7rem;margin-left:4px;font-weight:700}

/* logo 墙 */
.trustbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surf-2)}
.trustbar .wrap{display:flex;align-items:center;gap:40px;flex-wrap:wrap;justify-content:center;padding:26px 28px}
.trustbar .lbl{font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.04em}
.trustbar .it{font-size:var(--fs-sm);color:var(--ink-3);font-weight:600}

/* ============================================================ 产品矩阵 */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.prod{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;transition:all .28s var(--ease)}
.prod:hover{border-color:var(--line-2);box-shadow:var(--sh-lg);transform:translateY(-3px)}
.prod .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-50);color:var(--brand-d);margin-bottom:18px}
.prod .ic svg{width:24px;height:24px}
.prod[data-c=purple] .ic{background:#ECEBFA;color:var(--purple)}
.prod[data-c=blue] .ic{background:#E9EEF6;color:var(--blue)}
.prod[data-c=orange] .ic{background:#FDF1DC;color:#C77F12}
.prod .en{font-family:var(--font-en);font-size:var(--fs-xs);font-weight:700;letter-spacing:.04em;color:var(--ink-3);text-transform:uppercase}
.prod h3{font-size:var(--fs-h3);margin:5px 0 8px}
.prod p{font-size:var(--fs-sm);color:var(--ink-2);line-height:1.6;margin-bottom:16px}

/* ============================================================ 解决方案 */
.sol{background:var(--surf-2)}
.sol-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.sol-card{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 16px;transition:.25s var(--ease)}
.sol-card:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:transparent}
.sol-card .si{width:30px;height:30px;color:var(--brand-d)}
.sol-card .si svg{width:30px;height:30px;stroke-width:1.5}
.sol-card b{font-size:var(--fs-sm);font-weight:600;color:var(--ink-1)}

/* ============================================================ stats 深色 */
.stats{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.stats::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,#000,transparent)}
.stats::after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;right:-160px;top:-160px;
  background:radial-gradient(circle,rgba(35,171,96,.22),transparent 65%)}
.stats .wrap{position:relative}
.stats .s-head h2{color:#fff}.stats .s-head p{color:rgba(255,255,255,.62)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center;padding:8px}
.stat .n{font-family:var(--font-en);font-size:clamp(2.4rem,4vw,3.2rem);font-weight:800;letter-spacing:-.04em;
  color:var(--brand-l)}
.stat .l{color:rgba(255,255,255,.66);margin-top:8px;font-size:var(--fs-sm)}

/* ============================================================ 案例（克制，绿色为主） */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{display:block;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:#fff;transition:.28s var(--ease)}
.case:hover{box-shadow:var(--sh-lg);transform:translateY(-3px);border-color:var(--line-2)}
.case .ph{aspect-ratio:16/9;background:var(--surf-3);position:relative;overflow:hidden}
.case .ph::after{content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(35,171,96,.10),transparent 60%),
            radial-gradient(circle at 80% 20%,rgba(35,171,96,.14),transparent 50%)}
.case .ph .tagline{position:absolute;left:20px;bottom:18px;font-weight:700;font-size:var(--fs-md);color:var(--ink-1);z-index:1;max-width:80%}
.case .bd{padding:18px 20px}
.case .bd .ind{font-size:var(--fs-xs);color:var(--brand-d);font-weight:700;letter-spacing:.03em}
.case .bd p{font-size:var(--fs-sm);color:var(--ink-2);margin-top:5px;line-height:1.6}

/* ============================================================ CTA */
.cta{position:relative;background:linear-gradient(135deg,var(--brand-d),var(--brand));color:#fff;
  border-radius:var(--r-xl);padding:clamp(44px,6vw,68px);overflow:hidden;text-align:center}
.cta::before{content:"";position:absolute;inset:0;opacity:.6;
  background:radial-gradient(420px 260px at 15% 15%,rgba(255,255,255,.16),transparent),
            radial-gradient(460px 280px at 88% 92%,rgba(11,18,32,.28),transparent)}
.cta .in{position:relative}
.cta h2{font-size:var(--fs-h2);color:#fff;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.92);max-width:520px;margin:0 auto 30px;font-size:var(--fs-md)}

/* ============================================================ FOOTER */
.site-footer{background:var(--navy);color:rgba(255,255,255,.62);padding:72px 0 48px;font-size:var(--fs-sm)}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:36px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand img{height:28px;filter:brightness(0) invert(1);opacity:.95;margin-bottom:16px}
.foot-brand p{max-width:290px;line-height:1.7;color:rgba(255,255,255,.55)}
.foot-tel{font-family:var(--font-en);color:var(--brand-l);font-size:1.45rem;font-weight:800;margin-top:18px;letter-spacing:.01em}
.foot-col h4{color:#fff;font-size:var(--fs-sm);margin-bottom:15px;font-weight:600}
.foot-col a{display:block;padding:5px 0;color:rgba(255,255,255,.55)}
.foot-col a:hover{color:var(--brand-l)}
.foot-bottom{padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:rgba(255,255,255,.55);font-size:var(--fs-xs)}
.foot-bottom a{color:rgba(255,255,255,.55)}.foot-bottom a:hover{color:var(--brand-l)}

/* ============================================================ 响应式 */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:48px}.panel{max-width:480px}
  .prod-grid,.cases-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid{grid-template-columns:repeat(3,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .wrap{padding:0 20px}
  .nav-menu,.nav-tel{display:none}.nav-toggle{display:flex}
  .nav.open .nav-menu{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;gap:2px}
  .nav.open .mega{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;min-width:0;padding:4px 0 8px}
  .prod-grid,.cases-grid,.sol-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .hero-trust{gap:28px}
}
/* ============================================================ 内页通用（产品/方案/关于） */
.page-hero{position:relative;padding:clamp(56px,7vw,88px) 0 clamp(48px,6vw,72px);overflow:hidden;
  background:var(--surf-2);border-bottom:1px solid var(--line)}
.page-hero.dark{background:var(--navy);color:#fff;border-bottom:0}
.page-hero::after{content:"";position:absolute;inset:0;z-index:0;opacity:.5;
  background:radial-gradient(700px 380px at 88% -20%,rgba(35,171,96,.12),transparent 60%)}
.page-hero .wrap{position:relative;z-index:1}
.crumbs{font-size:var(--fs-xs);color:var(--ink-3);margin-bottom:18px}
.page-hero.dark .crumbs{color:rgba(255,255,255,.5)}
.crumbs a:hover{color:var(--brand-d)}
.ph-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.ph-en{font-family:var(--font-en);font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-d)}
.page-hero.dark .ph-en{color:var(--brand-l)}
.ph-grid h1{font-size:clamp(2rem,1.2rem+2.6vw,3rem);line-height:1.18;margin:14px 0 18px;font-weight:800;letter-spacing:-.03em}
.ph-grid .lead{max-width:520px}
.ph-cta{display:flex;gap:13px;margin-top:28px;flex-wrap:wrap}
/* 特性交替行 */
.feature{padding:clamp(40px,5vw,64px) 0}
.feature .row{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.feature .row+.row{margin-top:clamp(48px,6vw,80px)}
.feature .row.flip .txt{order:2}
.feature .row .txt h3{font-size:var(--fs-h2);line-height:1.25;margin:12px 0 14px}
.feature .row .txt p{color:var(--ink-2);font-size:var(--fs-base)}
.feature .row .txt ul{list-style:none;margin-top:18px;display:grid;gap:10px}
.feature .row .txt li{display:flex;gap:10px;align-items:flex-start;font-size:var(--fs-sm);color:var(--ink-1)}
.feature .row .txt li::before{content:"";flex:none;width:18px;height:18px;margin-top:3px;border-radius:50%;
  background:var(--brand-50) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2323AB60' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5 9-10'/%3E%3C/svg%3E") center/11px no-repeat}
.feature .visual{aspect-ratio:4/3;border-radius:var(--r-lg);border:1px solid var(--line);background:#fff;
  box-shadow:var(--sh);display:grid;place-items:center;overflow:hidden;position:relative}
.feature .visual::before{content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,var(--surf-2),#fff);}
.feature .visual .vh{position:relative;color:var(--brand);opacity:.9}
.feature .visual .vh svg{width:84px;height:84px;stroke-width:1.2}
/* 能力网格 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cap{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.cap .ci{width:40px;height:40px;border-radius:10px;background:var(--brand-50);color:var(--brand-d);display:grid;place-items:center;margin-bottom:14px}
.cap .ci svg{width:22px;height:22px}
.cap h4{font-size:var(--fs-base);margin-bottom:7px}
.cap p{font-size:var(--fs-sm);color:var(--ink-2);line-height:1.6}
/* 方案页增强 */
.sol-ov{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-lg);padding:8px 22px;backdrop-filter:blur(4px)}
.sol-ov .ov{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.sol-ov .ov:last-child{border-bottom:0}
.sol-ov .ov .n{font-family:var(--font-en);font-size:1.7rem;font-weight:800;color:var(--brand-l);letter-spacing:-.02em}
.sol-ov .ov .l{color:rgba(255,255,255,.72);font-size:var(--fs-sm)}
.chal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.chal{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;position:relative}
.chal .num{font-family:var(--font-en);font-size:.8rem;font-weight:800;color:var(--brand);background:var(--brand-50);width:30px;height:30px;border-radius:8px;display:grid;place-items:center;margin-bottom:14px}
.chal h4{font-size:var(--fs-base);margin-bottom:7px}
.chal p{font-size:var(--fs-sm);color:var(--ink-2);line-height:1.6}
.appr-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.appr{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:.25s var(--ease)}
.appr:hover{box-shadow:var(--sh);transform:translateY(-3px);border-color:var(--brand-2,var(--line-2))}
.appr .ci{width:42px;height:42px;border-radius:11px;background:var(--brand-50);color:var(--brand-d);display:grid;place-items:center;margin-bottom:14px}
.appr .ci svg{width:22px;height:22px}
.appr h4{font-size:var(--fs-base);margin-bottom:7px}
.appr p{font-size:var(--fs-sm);color:var(--ink-2);line-height:1.6;margin-bottom:12px}
.appr .pl{font-size:var(--fs-xs);font-weight:700;color:var(--brand-d)}
.prod-chips{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.chip{display:inline-flex;align-items:center;gap:9px;padding:12px 20px;border:1px solid var(--line);border-radius:999px;background:#fff;font-weight:600;font-size:var(--fs-sm);transition:.2s var(--ease)}
.chip:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-50)}
.chip svg{width:18px;height:18px;color:var(--brand-d)}
@media(max-width:980px){.chal-grid,.appr-grid{grid-template-columns:1fr 1fr}}
@media(max-width:680px){.chal-grid,.appr-grid{grid-template-columns:1fr}}
/* 富文本（关于/隐私/条款） */
.prose{max-width:780px;margin:0 auto}
.prose h2{font-size:var(--fs-h3);margin:36px 0 14px}
.prose h2:first-child{margin-top:0}
.prose p{color:var(--ink-2);margin-bottom:14px}
.prose ul{color:var(--ink-2);margin:0 0 14px 22px;display:grid;gap:8px}
@media(max-width:980px){.ph-grid,.feature .row{grid-template-columns:1fr;gap:32px}
  .feature .row.flip .txt{order:0}.cap-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.cap-grid{grid-template-columns:1fr}}

/* ============================================================ 新闻流（Ghost /news 同源主题） */
.news-hero{background:var(--surf-2);border-bottom:1px solid var(--line);padding:clamp(48px,6vw,76px) 0 clamp(40px,5vw,56px)}
.news-hero .crumbs{margin-bottom:14px}
.news-hero h1{font-size:clamp(1.9rem,1.2rem+2.2vw,2.6rem);letter-spacing:-.03em}
.news-hero p{color:var(--ink-2);margin-top:12px;font-size:var(--fs-md);max-width:620px}
.news-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.news-tabs a{padding:8px 16px;border-radius:999px;font-size:var(--fs-sm);font-weight:600;border:1px solid var(--line-2);background:#fff;color:var(--ink-2)}
.news-tabs a:hover,.news-tabs a.active{border-color:var(--brand);color:var(--brand-d);background:var(--brand-50)}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:#fff;transition:.28s var(--ease)}
.post-card:hover{box-shadow:var(--sh-lg);transform:translateY(-3px);border-color:var(--line-2)}
.post-card .thumb{aspect-ratio:16/9;background:var(--surf-3);overflow:hidden;position:relative}
.post-card .thumb img{width:100%;height:100%;object-fit:cover}
.post-card .thumb.none::after{content:"DataHunter";position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-en);font-weight:800;color:var(--ink-4);letter-spacing:.04em;
  background:linear-gradient(135deg,var(--brand-50),#fff)}
.post-card .pc{padding:20px 22px;display:flex;flex-direction:column;flex:1}
.post-card .ptag{font-size:var(--fs-xs);font-weight:700;color:var(--brand-d);letter-spacing:.03em}
.post-card h2{font-size:1.12rem;line-height:1.45;margin:8px 0 10px;letter-spacing:-.01em}
.post-card .ex{font-size:var(--fs-sm);color:var(--ink-2);line-height:1.6;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .meta{margin-top:14px;font-size:var(--fs-xs);color:var(--ink-3)}
.pager{display:flex;justify-content:center;gap:12px;margin-top:48px}
.pager a,.pager span{padding:9px 18px;border-radius:999px;border:1px solid var(--line-2);font-size:var(--fs-sm);font-weight:600;color:var(--ink-2)}
.pager a:hover{border-color:var(--brand);color:var(--brand-d)}
/* 单篇文章 */
.article{max-width:760px;margin:0 auto;padding:clamp(48px,6vw,72px) 0}
.article .crumbs{margin-bottom:18px}
.article .a-tag{font-size:var(--fs-sm);font-weight:700;color:var(--brand-d)}
.article h1{font-size:clamp(1.8rem,1.2rem+2vw,2.5rem);line-height:1.25;margin:12px 0 16px;letter-spacing:-.025em}
.article .a-meta{color:var(--ink-3);font-size:var(--fs-sm);padding-bottom:24px;margin-bottom:8px;border-bottom:1px solid var(--line)}
.article .a-feat{margin:24px 0;border-radius:var(--r-lg);overflow:hidden}
.post-content{font-size:1.075rem;line-height:1.85;color:var(--ink-1)}
.post-content>*{margin-bottom:1.1em}
.post-content h2{font-size:1.5rem;margin:1.6em 0 .6em}
.post-content h3{font-size:1.25rem;margin:1.4em 0 .5em}
.post-content p{color:#1d2733}
.post-content a{color:var(--brand-d);text-decoration:underline;text-underline-offset:3px}
.post-content img{border-radius:var(--r);margin:1.4em auto;box-shadow:var(--sh)}
.post-content ul,.post-content ol{margin:0 0 1.1em 1.4em;color:#1d2733}
.post-content li{margin-bottom:.4em}
.post-content blockquote{border-left:3px solid var(--brand);padding:4px 0 4px 20px;color:var(--ink-2);margin:1.2em 0}
.post-content table{width:100%;border-collapse:collapse;font-size:var(--fs-sm)}
.post-content td,.post-content th{border:1px solid var(--line);padding:8px 12px}
.post-content figure{margin:1.4em 0}.post-content figcaption{text-align:center;color:var(--ink-3);font-size:var(--fs-sm);margin-top:8px}
.a-foot{max-width:760px;margin:0 auto;padding:32px 0 8px;border-top:1px solid var(--line)}
@media(max-width:980px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.post-grid{grid-template-columns:1fr}}

.reveal{opacity:0;transform:translateY(20px);animation:rv .7s var(--ease) forwards}
@keyframes rv{to{opacity:1;transform:none}}
.d1{animation-delay:.06s}.d2{animation-delay:.14s}.d3{animation-delay:.22s}.d4{animation-delay:.3s}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}