/* ============================================================
   智逸耕 zhiyigeng.com · 官网 v3 M1 浅色主题（Ploy 风 · 2026-09-08）
   淡粉蓝背景 · 白药丸导航 · 黑标题 · 浅蓝白卡片 · 柔和阴影留白
   纯本地：系统字体栈 / 零外链 / 离线可开；变量化便于后续微调。
   ============================================================ */
:root{
  --bg:#eef4fb;              /* 淡粉蓝底 */
  --bg-soft:#f6faff;
  --card:#ffffff;
  --card-2:#f3f8ff;
  --ink:#0d1b2a;             /* 黑标题 */
  --ink-soft:#1c2f45;
  --muted:#5b6f86;
  --muted-2:#7c8da3;
  --line:#dce7f4;
  --line-strong:#c7d8ec;
  --brand:#4f6ef7;           /* 主蓝紫 */
  --brand-2:#7a5cf0;
  --cyan:#0ea5c4;
  --amber:#d97706;
  --ok:#16a34a;
  --shadow:0 14px 34px rgba(31,58,102,.10);
  --shadow-sm:0 6px 18px rgba(31,58,102,.08);
  --pill:rgba(255,255,255,.9);
  --radius:18px;
  --radius-sm:11px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink-soft);
  line-height:1.75;
  background:
    radial-gradient(900px 500px at 92% -10%, rgba(167,169,255,.18), transparent 60%),
    radial-gradient(820px 480px at -8% 8%, rgba(150,210,255,.22), transparent 55%),
    var(--bg);
  background-attachment:fixed;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-2);text-decoration:underline}
:focus-visible{outline:3px solid rgba(79,110,247,.45);outline-offset:2px;border-radius:8px}
::selection{background:rgba(79,110,247,.18)}
.skip-link{position:absolute;left:-9999px;top:0;z-index:99;background:var(--brand);color:#fff;padding:10px 16px;font-weight:700;border-radius:0 0 10px 0}
.skip-link:focus{left:8px;top:8px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:860px}
.center{text-align:center}

/* ---------- 顶部导航（白药丸） ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{width:36px;height:36px;border-radius:12px;flex:none;background:linear-gradient(135deg,#7aa5ff,var(--brand-2));color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.5px;color:var(--ink);line-height:1.15}
.brand-name small{display:block;font-size:11px;color:var(--muted-2);font-weight:500}
.site-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--pill);border:1px solid var(--line);border-radius:999px;padding:5px 8px}
.site-nav a{padding:7px 13px;border-radius:999px;color:var(--ink-soft);font-weight:600;font-size:14.5px}
.site-nav a:hover{background:#eef3ff;color:var(--brand);text-decoration:none}
.site-nav .nav-cta{background:var(--brand);color:#fff}
.site-nav .nav-cta:hover{background:var(--brand-2);color:#fff}
.site-nav .nav-mail{font-size:13px;color:var(--muted);font-weight:500}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:12px 24px;border-radius:999px;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;transition:transform .18s ease, box-shadow .18s ease;text-align:center}
.btn:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(79,110,247,.28)}
.btn-primary:hover{background:var(--brand-2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand)}
.btn-block{width:100%}
.btn-disabled{cursor:default;opacity:.6}
.btn-disabled:hover{transform:none;box-shadow:none}

/* ---------- Hero（品牌故事首屏） ---------- */
.hero{position:relative;padding:72px 0 66px;overflow:hidden}
.hero-inner{position:relative;z-index:1;max-width:880px;text-align:center;margin:0 auto}
.hero-kicker{display:inline-block;font-size:13px;font-weight:800;letter-spacing:2px;color:var(--brand);background:#e7edff;border-radius:999px;padding:6px 16px;margin:0 0 18px}
.hero-title{margin:0 0 18px;font-size:clamp(32px,5.4vw,54px);line-height:1.16;letter-spacing:.5px;color:var(--ink);font-weight:800}
.hero-lead{margin:0 auto 30px;max-width:760px;font-size:clamp(16px,2.2vw,19px);color:var(--ink-soft)}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.hero-note{font-size:14px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-kicker{margin:0 0 8px;font-size:13px;font-weight:800;letter-spacing:2px;color:var(--brand)}
.section-title{margin:0 0 14px;font-size:clamp(24px,3.2vw,36px);line-height:1.3;color:var(--ink)}
.title-sub{display:block;font-size:.64em;color:var(--muted);font-weight:600;margin-top:6px}
.lead{margin:0 0 28px;font-size:16.5px;color:var(--muted)}
.fine-print{font-size:13px;color:var(--muted-2)}

/* ---------- 产品系列卡（一行 3 个） ---------- */
.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:4px}
@media(max-width:900px){.series-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.series-grid{grid-template-columns:1fr}}
.scard{
  display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.scard:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scard-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.scard-name{font-size:19px;font-weight:800;color:var(--ink);margin:0}
.scard-desc{color:var(--muted);font-size:14.5px;margin:0;flex:1}
.scard-link{align-self:flex-start;margin-top:6px}
.scard-more{justify-content:center;align-items:center;text-align:center;border-style:dashed}
.scard-more .scard-name{margin-top:4px}
.scard-more .btn{width:100%}

/* ---------- 通用卡片/网格/列表 ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.card h3{margin:4px 0 10px;color:var(--ink);font-size:18px}
.card p{margin:0 0 8px;color:var(--ink-soft)}
.grid{display:grid;gap:20px}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.grid.feature{grid-template-columns:1.25fr 1fr;align-items:start}
.grid.feature.oc-equal{grid-template-columns:1fr 1fr;align-items:stretch}
.grid.feature.oc-equal .card{display:flex;flex-direction:column;justify-content:center}
@media(max-width:1020px){.grid.three,.grid.four{grid-template-columns:repeat(2,1fr)}.grid.feature{grid-template-columns:1fr}.grid.feature.oc-equal{grid-template-columns:1fr}}
@media(max-width:640px){.grid.three,.grid.four{grid-template-columns:1fr}}
.steps{margin:6px 0 0;padding-left:22px}
.steps li{margin-bottom:8px}
.check-list{margin:6px 0 12px;padding-left:20px}
.check-list li{margin-bottom:6px}
.layer-tag{display:inline-block;font-size:12px;font-weight:800;letter-spacing:1px;color:var(--brand);background:#e7edff;border-radius:999px;padding:4px 12px;margin-bottom:6px}
.tag{display:inline-block;font-size:12px;font-weight:800;letter-spacing:1px;color:var(--brand);background:#e7edff;border-radius:999px;padding:4px 12px;margin-bottom:8px;white-space:nowrap}
.tag-live{color:#0b6e3c;background:#dcf5e7}
.tag-idle{color:#8a6a00;background:#fdf1cf}
.roadmap-card p{margin-bottom:0}
.feature-main,.feature-side h3{margin-top:14px}
.feature-main h3:first-child{margin-top:0}
.feature-side .fine-print{margin-top:10px}

/* ---------- 表单（浅色） ---------- */
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;margin-bottom:6px;font-size:14.5px;color:var(--ink)}
.req{color:#d33}
.field input,.field select,.field textarea{width:100%;font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line-strong);border-radius:var(--radius-sm);padding:11px 13px}
.field input::placeholder,.field textarea::placeholder{color:var(--muted-2)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,110,247,.16)}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--muted);margin:4px 0 16px}
.consent input{margin-top:4px;width:16px;height:16px;flex:none;accent-color:var(--brand)}
.form-tip{font-size:13px;color:var(--muted-2);margin:12px 0 0}
.register-ok{background:#eef4ff;border:1px solid #c9dcff;border-radius:var(--radius);padding:24px;margin-top:8px}
.ok-title{font-size:19px;font-weight:800;color:var(--ink);margin:0 0 8px}
.register-ok p{margin:6px 0;color:var(--ink-soft)}

/* ---------- 内页/文档 ---------- */
.workspace .crumb{color:var(--muted-2);font-size:14px;padding:14px 0 0}
.workspace .crumb a{color:var(--brand)}
.doc h2{margin:32px 0 10px;font-size:20px;color:var(--ink)}
.doc p,.doc li{color:var(--ink-soft)}
.meta-line{font-size:13.5px;color:var(--muted)}

/* ---------- 注册/登录 ---------- */
.auth-wrap{max-width:440px;margin:0 auto}
.auth-title{text-align:center;color:var(--ink);margin:0 0 6px}
.auth-sub{text-align:center;color:var(--muted);margin:0 0 22px}
.auth-note{margin:16px 0 0;font-size:13px;color:var(--muted-2);text-align:center}
.auth-actions{margin-top:6px}

/* ---------- 页脚 ---------- */
.site-footer{background:#e9f1fb;border-top:1px solid var(--line);padding:32px 0;color:var(--muted)}
.footer-inner{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
.footer-inner p{margin:0;font-size:14px}
.footer-inner nav{display:flex;gap:16px;flex-wrap:wrap}
.footer-inner a{color:var(--ink-soft)}
.footer-inner .fine-print{width:100%;font-size:12.5px;color:var(--muted-2)}

/* ---------- 固定会话条（工作区；浅色版 + 安全区） ---------- */
.session-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-top:1px solid var(--line);padding:10px 0 14px;box-shadow:0 -10px 26px rgba(31,58,102,.08)}
.session-inner{display:flex;flex-direction:column;gap:7px}
.session-hint{font-size:12.5px;color:var(--muted-2);margin:0}
.session-row{display:flex;gap:10px}
.session-input{flex:1;min-width:0;background:#fff;border:1px solid var(--line-strong);border-radius:var(--radius-sm);color:var(--ink);padding:12px 14px;font:inherit}
.session-input::placeholder{color:var(--muted-2)}
.session-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,110,247,.16)}
.session-send{flex:none;padding:11px 22px}
.session-note{min-height:18px;font-size:13px;color:var(--muted);margin:0}
.has-session .site-footer{padding-bottom:178px}
@media(min-width:761px){.has-session .site-footer{padding-bottom:138px}}
@media(max-width:760px){
  .session-row{flex-wrap:wrap}
  .session-input{font-size:16px}
  .session-send{width:100%}
  .has-session .site-footer{padding-bottom:190px}
}

/* ---------- 移动端 ---------- */
@media(max-width:760px){
  .header-inner{flex-direction:column;padding:12px 0;gap:10px}
  .site-header{position:static}
  #series{scroll-margin-top:0}
  .site-nav{gap:6px;border-radius:20px;justify-content:center}
  .section{padding:54px 0}
  .hero{padding:52px 0 46px}
  .footer-inner{flex-direction:column;align-items:flex-start}
}

/* ---------- 动效尊重 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ws-intro（工作区引言区） */
.ws-intro{padding-bottom:44px}
.ws-intro .fine-print{margin-top:8px}

/* F1：tag-launch 蓝标=筹备中/进行中（区别于 tag-live 已上线绿标） */
.tag-launch{color:#1d4ed8;background:#dbeafe}

/* ============ t44：首页精修（三排品牌故事 + 右侧三按钮 + 首屏同框） ============ */
.hero{padding:22px 0 16px}
.hero-split{max-width:1120px;display:grid;grid-template-columns:1.7fr .58fr;gap:46px;align-items:center;text-align:left;margin:0 auto}
.hero-copy{text-align:left}
.hero-copy .hero-kicker{margin-bottom:10px}
.hero-copy .hero-title{font-size:clamp(30px,4.6vw,50px);margin-bottom:10px;text-align:left}
.hero-copy .hero-lead{text-align:left;margin:0 0 8px;font-size:clamp(12.5px,1.55vw,18px);line-height:1.75}
.hero-lead strong{color:var(--brand);font-weight:800}
.hero-copy .hero-row3{display:block;white-space:nowrap}
.hero-copy .hero-note{text-align:left;margin-top:4px}
.hero-cta{display:flex;flex-direction:column;gap:12px}
.btn-hero{width:100%;max-width:225px;margin:0 auto;padding:13px 16px;font-size:17px;border-radius:18px;box-shadow:var(--shadow-sm);text-align:center;white-space:nowrap}
.btn-hero.btn-primary{box-shadow:0 12px 26px rgba(79,110,247,.32)}
/* 让「品牌故事 + 第一排 3 个产品卡」在首屏(约100vh)内同框：hero 紧凑 + #series 顶部收紧 */
#series{padding-top:12px;scroll-margin-top:70px}
#series .section-title{margin-bottom:10px}
@media(max-width:960px){
  .hero-split{grid-template-columns:1fr;gap:24px}
  .hero-cta{flex-direction:row;flex-wrap:wrap;gap:10px}
  .btn-hero{width:auto;flex:1 1 150px;max-width:none;margin:0;white-space:normal}
  #series{padding-top:34px}
  .hero-copy .hero-lead{font-size:clamp(15.5px,2vw,18.5px);line-height:1.8}
  .hero-copy .hero-row3{white-space:normal;font-size:inherit}
}
/* t50：hero-cta 内提示行居中窄排 */
.hero-cta .hero-note{margin:2px 0 0;text-align:center;font-size:13px;color:var(--muted-2);line-height:1.6}