/* ===========================================================
   胡萝卜工具箱 — 共享设计系统
   统一配色 / 导航 / 卡片 / 封面 / 页脚 / 动画
   所有页面引用此文件，保证"一套视觉，不像拼凑"
   =========================================================== */
:root{
  --cream:#FBF7F2; --cream-2:#F4ECE3; --paper:#FFFDFB;
  --ink:#3A3330; --ink-soft:#6E635E;
  --rose:#F2994A; --rose-deep:#E07B39; --rose-soft:#FCE6D6;
  --green:#5BA85B; --green-soft:#E6F2E6;
  --gold:#C9A36A;
  --tech:#7A6CF0; --tech-2:#5B4FD0; --tech-3:#9B8DF2; --tech-soft:#ECE9FB; --cyan:#34D8E6;
  --line:rgba(58,51,48,.10); --line-tech:rgba(122,108,240,.18);
  --shadow:0 18px 50px -20px rgba(58,51,48,.28);
  --radius:20px; --maxw:1120px;
  --grad:linear-gradient(120deg,var(--rose-deep),var(--tech));
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--cream);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,.serif{font-family:"Noto Serif SC",Georgia,"Songti SC",serif}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.mono{font-family:ui-monospace,"DIN",Consolas,"Roboto Mono",monospace;font-variant-numeric:tabular-nums}
.eyebrow{letter-spacing:.32em;font-size:12px;color:var(--rose-deep);font-weight:700;text-transform:uppercase}

/* ---------- NAV ---------- */
header.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(16px);background:rgba(251,247,242,.72);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-family:"Noto Serif SC",serif;font-weight:900;font-size:20px;letter-spacing:.04em;color:var(--ink)}
.brand .mark{width:34px;height:34px;flex:none}
.brand small{font-size:11px;font-weight:500;letter-spacing:.18em;color:var(--ink-soft);font-family:"Noto Sans SC",sans-serif;margin-left:2px}
.nav-links{display:flex;align-items:center;gap:26px;font-size:14.5px;color:var(--ink-soft);font-weight:500}
.nav-links a{transition:color .2s;position:relative}
.nav-links a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--grad);transform:scaleX(0);transition:transform .25s;transform-origin:left}
.nav-links a:not(.btn):hover{color:var(--rose-deep)}
.nav-links a:not(.btn):hover::after{transform:scaleX(1)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:999px;font-weight:600;font-size:14.5px;transition:transform .18s ease,box-shadow .25s ease,background .25s;cursor:pointer;border:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--rose),var(--rose-deep));color:#fff;box-shadow:0 12px 26px -10px rgba(156,85,96,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 32px -10px rgba(156,85,96,.7)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--rose);color:var(--rose-deep)}
.btn-tech{background:linear-gradient(135deg,var(--tech),var(--tech-2));color:#fff;box-shadow:0 12px 26px -10px rgba(91,79,208,.6)}
.btn-tech:hover{transform:translateY(-2px);box-shadow:0 18px 32px -10px rgba(91,79,208,.7)}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink)}

/* ---------- HERO (浅色 + 网格辉光) ---------- */
.hero{position:relative;padding:96px 0 84px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(122,108,240,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(122,108,240,.10) 1px,transparent 1px);background-size:46px 46px;-webkit-mask:radial-gradient(720px 520px at 50% 28%,#000,transparent);mask:radial-gradient(720px 520px at 50% 28%,#000,transparent);opacity:.7}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5}
.blob.b1{width:440px;height:440px;background:var(--rose-soft);top:-130px;right:-90px}
.blob.b2{width:380px;height:380px;background:var(--green-soft);bottom:-150px;left:-110px}
.blob.b3{width:300px;height:300px;background:var(--tech-soft);top:40px;left:46%;opacity:.45;filter:blur(70px)}
.hero-inner{position:relative;z-index:1;max-width:780px}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.16;font-weight:900;margin:18px 0 22px;letter-spacing:.01em}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(15px,1.8vw,19px);color:var(--ink-soft);max-width:620px;font-weight:300}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;margin-top:54px;flex-wrap:wrap}
.hero-stats .s b{font-family:"Noto Serif SC",serif;font-size:30px;color:var(--rose-deep);display:block;line-height:1}
.hero-stats .s span{font-size:13px;color:var(--ink-soft)}
.hero-line{height:2px;margin-top:46px;background:linear-gradient(90deg,transparent,var(--rose),var(--tech),transparent);opacity:.5}

/* ---------- SECTION ---------- */
section.block{padding:84px 0}
.section-head{text-align:center;max-width:640px;margin:0 auto 50px}
.section-head h2{font-size:clamp(26px,3.4vw,40px);font-weight:900;margin:14px 0 14px;letter-spacing:.01em}
.section-head p{color:var(--ink-soft);font-weight:300;font-size:16px}
.divider{display:flex;align-items:center;justify-content:center;gap:14px;max-width:var(--maxw);margin:0 auto;padding:0 28px}
.divider::before,.divider::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,transparent,var(--line),transparent)}
.divider .dia{width:9px;height:9px;transform:rotate(45deg);background:var(--grad);border-radius:2px;flex:none}

/* ---------- 通用玻璃卡片 ---------- */
.card{background:rgba(255,253,251,.72);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-6px);box-shadow:0 22px 44px -20px rgba(183,110,121,.4),0 0 0 1px var(--line-tech)}
.card .ic{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;font-size:26px;margin-bottom:16px;background:var(--rose-soft)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:14.5px;font-weight:300}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

/* ---------- 价值列表 ---------- */
.feat-list{list-style:none;display:grid;gap:14px}
.feat-list li{display:flex;gap:12px;align-items:flex-start}
.feat-list .ck{width:24px;height:24px;border-radius:50%;background:var(--rose-soft);color:var(--rose-deep);display:grid;place-items:center;font-size:13px;font-weight:800;flex:none;margin-top:2px}
.feat-list b{display:block;font-size:15px;margin-bottom:2px}
.feat-list span{color:var(--ink-soft);font-size:14px;font-weight:300}

/* ---------- 标签 ---------- */
.tag{display:inline-block;font-size:12px;padding:5px 12px;border-radius:999px;background:var(--tech-soft);color:var(--tech-2);font-weight:700;margin:4px 4px 0 0}
.uses{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,rgba(243,221,224,.55),rgba(236,233,251,.55));border:1px solid var(--line);border-radius:28px;padding:56px 40px;text-align:center}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:900;margin-bottom:14px}
.cta-band p{color:var(--ink-soft);max-width:560px;margin:0 auto 26px;font-weight:300}

/* ---------- 技术底座（深色玻璃面板） ---------- */
.tech-panel{background:linear-gradient(135deg,#1b1530,#0e0b1c);border-radius:28px;padding:54px 40px;color:#fff;margin-top:8px}
.tech-panel .section-head{margin-bottom:34px}
.tech-panel .section-head h2{color:#fff}
.tech-panel .section-head p{color:rgba(255,255,255,.72)}
.tech-panel .eyebrow{color:#B9AEF7}
.tech-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tech-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:26px;transition:.25s}
.tech-card:hover{transform:translateY(-4px);border-color:rgba(155,141,242,.5);box-shadow:0 18px 40px rgba(0,0,0,.3)}
.tech-card .ic{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;font-size:26px;margin-bottom:16px;background:rgba(122,108,240,.22)}
.tech-card h3{color:#fff;font-size:18px;margin-bottom:8px}
.tech-card p{color:rgba(255,255,255,.72);font-size:14px;font-weight:300}

/* ---------- 详解双栏（答题 / 产品场景） ---------- */
.spotlight{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.spot-card{display:grid;place-items:center}

/* ---------- 品牌故事图文 ---------- */
.story{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.story .pic{height:340px;border-radius:24px;background:
   radial-gradient(circle at 30% 30%,var(--rose-soft),transparent 60%),
   radial-gradient(circle at 75% 65%,var(--green-soft),transparent 55%),
   linear-gradient(135deg,#fff,var(--cream-2));
   border:1px solid var(--line);display:grid;place-items:center;font-size:88px}
.story h2{font-size:clamp(24px,3vw,34px);font-weight:900;margin-bottom:16px}
.story p{color:var(--ink-soft);font-weight:300;margin-bottom:12px}

/* ---------- 返回条 / 面包屑 ---------- */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-soft);padding:18px 0 0}
.crumbs a:hover{color:var(--rose-deep)}

/* ---------- 深色科技封面（答题详情页） ---------- */
.cover{position:relative;min-height:88vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;color:#fff;overflow:hidden;background:radial-gradient(1200px 700px at 50% -10%,var(--tech-2) 0%,#2A2350 40%,#0E0B1C 100%)}
.cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(122,108,240,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(122,108,240,.14) 1px,transparent 1px);background-size:54px 54px;opacity:.55;mask:radial-gradient(700px 500px at 50% 35%,#000,transparent);-webkit-mask:radial-gradient(700px 500px at 50% 35%,#000,transparent)}
.cover .glow{position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(52,216,230,.32),transparent 60%);top:6%;left:50%;transform:translateX(-50%);filter:blur(20px)}
.cover .brand-top{position:relative;font-size:13px;font-weight:700;letter-spacing:3px;opacity:.92;margin-bottom:26px;color:#D8D2FF}
.cover .brand-top .dot{color:var(--cyan)}
.cover .logo-big{position:relative;width:104px;height:104px;border-radius:28px;display:flex;align-items:center;justify-content:center;margin-bottom:30px;box-shadow:0 18px 50px rgba(122,108,240,.45);overflow:hidden}
.cover .logo-big img{width:100%;height:100%}
.cover h1{position:relative;font-size:clamp(36px,6vw,60px);font-weight:900;letter-spacing:2px;line-height:1.15;text-shadow:0 6px 30px rgba(0,0,0,.35);font-family:"Noto Serif SC",serif}
.cover .tagline{position:relative;font-size:19px;margin-top:22px;color:#DCE6FF;font-weight:500;letter-spacing:1px}
.cover .tags{position:relative;display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:34px}
.cover .tags span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:9px 18px;border-radius:999px;font-size:15px;backdrop-filter:blur(4px)}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:#9AA6D6;font-size:13px;letter-spacing:1px;animation:floaty 2s infinite}
@keyframes floaty{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ---------- FOOTER ---------- */
footer{background:linear-gradient(180deg,transparent,var(--cream-2));border-top:1px solid var(--line);padding:54px 0 30px;margin-top:40px}
.foot-inner{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between}
.foot-inner .col{max-width:280px}
.foot-inner .col h4{font-size:13px;letter-spacing:.12em;color:var(--ink-soft);margin-bottom:14px;text-transform:uppercase}
.foot-inner .col a{display:block;color:var(--ink-soft);font-size:14px;padding:5px 0;transition:color .2s}
.foot-inner .col a:hover{color:var(--rose-deep)}
.foot-inner .brand{margin-bottom:12px}
.copy{padding-top:24px;margin-top:30px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-soft);text-align:center}

/* ---------- reveal 动画 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .nav-links.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--cream);padding:18px 28px;gap:16px;border-bottom:1px solid var(--line);align-items:flex-start}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .spotlight,.story{grid-template-columns:1fr}
  .tech-cards{grid-template-columns:1fr}
}
@media(max-width:520px){
  .g4{grid-template-columns:1fr}
  .hero{padding:64px 0 56px}
  .tech-panel{padding:40px 22px}
  .cta-band{padding:40px 22px}
}