/* ============================================================
   郭磊 · 个人网页 · 靛蓝瓷设计系统
   移植自 guizang-ppt 靛蓝瓷主题（与大溟子/顾问两份 deck 同家族）
   ============================================================ */
:root{
  --ink:#13294b;
  --ink-rgb:19,41,75;
  --paper:#faf7f2;
  --paper-rgb:250,247,242;
  --paper-tint:#f2ede4;
  --ink-soft:#1c355e;
  --amber:#f5c518;
  --amber-soft:rgba(245,197,24,.16);
  --radius:18px;
  --hair:rgba(var(--ink-rgb),.16);
  --hair-strong:rgba(var(--ink-rgb),.32);
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --maxw:1120px;
  --pad:clamp(20px,5vw,64px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- 排版阶梯 ---------- */
.kicker{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.3em;
  text-transform:uppercase;
  opacity:.62;
  margin-bottom:14px;
}
.h-hero{
  font-family:var(--serif);
  font-weight:900;
  font-size:clamp(32px,5.8vw,64px);
  line-height:1.12;
  letter-spacing:-.01em;
}
.h-xl{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(26px,3.6vw,42px);
  line-height:1.2;
}
.h-md{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(18px,1.8vw,24px);
  line-height:1.35;
}
.lead{
  font-family:var(--serif);
  font-size:clamp(16px,1.5vw,20px);
  line-height:1.7;
  opacity:.88;
}
.body-zh{font-size:clamp(14px,1.15vw,16.5px);opacity:.82}
.meta-row{
  display:flex;flex-wrap:wrap;gap:.6em 1.2em;align-items:baseline;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;
  text-transform:uppercase;opacity:.66;
}
.hi{position:relative}
.hi::after{
  content:"";position:absolute;left:-.08em;right:-.08em;bottom:-.02em;
  height:.26em;background:rgba(var(--paper-rgb),.22);z-index:-1;
}
.light .hi::after{background:rgba(var(--ink-rgb),.09)}

/* ---------- 顶部导航 ---------- */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;justify-content:space-between;align-items:center;
  padding:14px var(--pad);
  background:rgba(var(--paper-rgb),.82);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--hair);
  transition:transform .35s ease;
}
#nav .brand{font-family:var(--serif);font-weight:700;font-size:17px;letter-spacing:.06em;text-decoration:none}
#nav .links{display:flex;gap:26px}
#nav .links a{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;opacity:.72;text-decoration:none;
}
#nav .links a:hover{opacity:1;text-decoration:underline;text-underline-offset:.4em}
#nav .cta{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  border:1px solid var(--ink);padding:7px 16px;text-decoration:none;
}
@media(max-width:860px){
  #nav{flex-wrap:wrap;row-gap:10px;padding-bottom:10px}
  #nav .links{
    display:flex;order:3;width:100%;gap:18px;
    overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  #nav .links::-webkit-scrollbar{display:none}
  #nav .links a{font-size:11.5px;flex:0 0 auto}
  #hero{padding-top:130px}
}

/* ---------- 网格防撑破（min-content 保护）---------- */
#hero .grid>div,#stats .grid>*,.ladder>*,.welds>*,.cases>*,.duo>*,.rowline,.svc{min-width:0}
@media(max-width:640px){#knowledge .grid{grid-template-columns:1fr!important}}

/* ---------- 区块骨架 ---------- */
section{padding:clamp(64px,10vh,120px) var(--pad)}
.wrap{max-width:var(--maxw);margin:0 auto}
.dark{background:var(--ink);color:var(--paper)}
.light{background:var(--paper);color:var(--ink)}
.rule{height:1px;background:currentColor;opacity:.22;margin:26px 0}

/* ---------- Hero ---------- */
#hero{
  min-height:100svh;display:flex;align-items:center;
  padding-top:96px;
  background:
    radial-gradient(1200px 600px at 85% 10%,rgba(var(--paper-rgb),.07),transparent 60%),
    radial-gradient(900px 500px at 10% 90%,rgba(var(--paper-rgb),.05),transparent 60%),
    var(--ink);
}
#hero .grid{
  display:grid;grid-template-columns:1.35fr .9fr;gap:clamp(32px,5vw,72px);
  align-items:center;max-width:var(--maxw);margin:0 auto;width:100%;
}
#hero .sub{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(16px,1.9vw,23px);opacity:.8;margin-top:18px;
}
#hero .lead{margin-top:22px;max-width:34em}
#hero .meta-row{margin-top:34px}
#hero .portrait{
  position:relative;justify-self:center;
  border:1px solid rgba(var(--paper-rgb),.32);
}
#hero .portrait img{width:min(340px,38vw);aspect-ratio:3/4;object-fit:cover}
#hero .portrait::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:64px;
  background:linear-gradient(180deg,rgba(var(--ink-rgb),0),rgba(var(--ink-rgb),.55));
  pointer-events:none;
}
@media(max-width:860px){
  #hero .grid{grid-template-columns:1fr;gap:36px}
  #hero .portrait img{width:min(260px,64vw)}
}

/* ---------- 数据条 ---------- */
#stats .grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(18px,3vw,40px);
}
.stat{
  background:#fff;border:1px solid var(--hair);border-radius:var(--radius);
  padding:22px 22px 18px;box-shadow:0 1px 2px rgba(var(--ink-rgb),.04);
}
.stat .n{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(34px,4.2vw,58px);line-height:.95;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.stat .n small{font-size:.42em;font-weight:500;margin-left:.1em;opacity:.75}
.stat .l{font-size:13.5px;opacity:.72;margin-top:10px;line-height:1.55}
.stat .m{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;
  text-transform:uppercase;opacity:.5;margin-bottom:6px;
}
@media(max-width:860px){#stats .grid{grid-template-columns:repeat(2,1fr)}}

/* ---------- 履历 ---------- */
.rowline{
  display:grid;grid-template-columns:150px 1fr 92px;gap:20px;
  padding:20px 0;border-top:1px solid var(--hair);align-items:baseline;
}
.rowline:last-of-type{border-bottom:1px solid var(--hair)}
.rowline .k{font-family:var(--serif);font-weight:700;font-size:17px}
.rowline .v{font-size:15px;opacity:.85;line-height:1.7}
.rowline .m{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;
  opacity:.55;justify-self:end;white-space:nowrap;
}
@media(max-width:720px){
  .rowline{grid-template-columns:1fr 84px}
  .rowline .k{grid-column:1/-1}
}

/* ---------- 金句幕（dark interlude）---------- */
#proposition .inner{max-width:820px}
#proposition .h-hero{font-size:clamp(28px,4.6vw,52px)}
#proposition .lead{margin-top:28px;opacity:.82}

/* ---------- 五级台阶 ---------- */
.ladder{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:clamp(14px,1.6vw,22px);
  margin-top:36px;
}
.step{
  background:#fff;border:1px solid var(--hair);border-radius:var(--radius);
  padding:16px 16px 14px;box-shadow:0 1px 2px rgba(var(--ink-rgb),.04);
}
.step .nb{
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;opacity:.45;
}
.step .t{font-family:var(--sans);font-weight:700;font-size:clamp(15px,1.3vw,18px);margin:8px 0 6px}
.step .d{font-size:13px;opacity:.72;line-height:1.6}
@media(max-width:860px){.ladder{grid-template-columns:1fr 1fr}}
@media(max-width:540px){.ladder{grid-template-columns:1fr}}

/* ---------- callout ---------- */
.callout{
  border-left:3px solid currentColor;
  border-radius:0 var(--radius) var(--radius) 0;
  padding:20px 26px;margin-top:34px;
  font-family:var(--serif);font-size:clamp(15px,1.35vw,18px);line-height:1.65;
}
.light .callout{background:rgba(var(--ink-rgb),.05)}
.dark .callout{background:rgba(var(--paper-rgb),.06)}
.callout .src{
  display:block;margin-top:10px;font-family:var(--mono);font-size:11px;
  letter-spacing:.2em;text-transform:uppercase;opacity:.55;
}

/* ---------- 双栏（RAG × 本体）---------- */
.duo{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);
  margin-top:36px;align-items:start;
}
.duo .col{border-left:3px solid currentColor;padding-left:22px}
.duo ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:12px}
.duo li{
  font-size:15px;opacity:.85;line-height:1.65;padding-left:1.1em;position:relative;
}
.duo li::before{content:"—";position:absolute;left:0;opacity:.5}
blockquote.bigquote{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(16px,1.5vw,20px);line-height:1.6;margin-top:14px;
}
@media(max-width:860px){.duo{grid-template-columns:1fr}}

/* ---------- 六焊点 ---------- */
.welds{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.6vw,34px);
  margin-top:36px;
}
.pillar{
  background:#fff;border:1px solid var(--hair);border-radius:var(--radius);
  padding:20px 22px;box-shadow:0 1px 2px rgba(var(--ink-rgb),.04);
}
.pillar .t{font-family:var(--serif);font-weight:700;font-size:clamp(17px,1.7vw,21px)}
.pillar .d{font-size:14px;opacity:.76;line-height:1.7;margin-top:10px}
@media(max-width:860px){.welds{grid-template-columns:1fr 1fr}}
@media(max-width:580px){.welds{grid-template-columns:1fr}}

/* ---------- 案例 ---------- */
.cases{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.6vw,34px);
  margin-top:36px;
}
.case{
  background:rgba(var(--paper-rgb),.05);border:1px solid rgba(var(--paper-rgb),.18);
  border-radius:var(--radius);padding:22px;
}
.case .ic{
  font-family:var(--serif);font-style:italic;font-size:15px;opacity:.5;
}
.case .t{font-family:var(--serif);font-weight:700;font-size:clamp(16px,1.6vw,20px);margin:8px 0 10px}
.case .d{font-size:14px;opacity:.78;line-height:1.7}
@media(max-width:860px){.cases{grid-template-columns:1fr}}

/* ---------- 服务阶梯 ---------- */
.services{margin-top:36px;counter-reset:svc}
.svc{
  display:grid;grid-template-columns:56px 190px 1fr;gap:18px;align-items:baseline;
  padding:18px 0;border-top:1px solid var(--hair);
}
.svc:last-of-type{border-bottom:1px solid var(--hair)}
.svc .nb{
  font-family:var(--serif);font-style:italic;font-weight:500;
  font-size:15px;opacity:.45;counter-increment:svc;
}
.svc .nb::before{content:"0" counter(svc)}
.svc .t{font-family:var(--sans);font-weight:700;font-size:16.5px}
.svc .d{font-size:14.5px;opacity:.8;line-height:1.65}
@media(max-width:720px){.svc{grid-template-columns:40px 1fr}.svc .d{grid-column:2}}

/* ---------- 联系 / 页脚 ---------- */
#contact .grid{
  display:grid;grid-template-columns:1.4fr .8fr;gap:clamp(32px,5vw,72px);align-items:center;
}
#contact .qr{
  justify-self:center;text-align:center;
}
#contact .qr img{
  width:min(220px,52vw);border:1px solid rgba(var(--paper-rgb),.32);
  background:#fff;padding:10px;
}
#contact .qr .slot{
  width:min(220px,52vw);height:min(220px,52vw);
  border:1.5px dashed rgba(var(--paper-rgb),.4);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;opacity:.6;
}
#contact .qr .cap{margin-top:12px;font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;opacity:.55}
footer{
  padding:26px var(--pad);border-top:1px solid rgba(var(--paper-rgb),.18);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;opacity:.5;
}
@media(max-width:720px){#contact .grid{grid-template-columns:1fr}}

/* ---------- Hero CTA 链接 ---------- */
.cta-links{margin-top:28px;display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.cta-primary{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;
  border:1px solid var(--amber);background:var(--amber-soft);
  padding:11px 22px;border-radius:999px;
  text-decoration:none;color:var(--paper);
}
.cta-primary:hover{background:rgba(245,197,24,.28)}
.cta-ghost{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  opacity:.66;text-decoration:none;border-bottom:1px solid rgba(var(--paper-rgb),.4);
  padding-bottom:2px;
}
.cta-ghost:hover{opacity:1}

/* ---------- 活样本 ---------- */
.proofs{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.6vw,34px);margin-top:36px;
}
.proof{display:flex;flex-direction:column;gap:12px;min-width:0}
.proof .shot{border:1px solid var(--hair);background:#fff;padding:8px;border-radius:14px;overflow:hidden}
.proof .shot img{width:100%;aspect-ratio:124/76;object-fit:cover;object-position:top center;display:block}
.proof figcaption{font-size:13.5px;opacity:.75;line-height:1.7}
.proof figcaption strong{font-family:var(--serif);font-size:15px;opacity:1}
@media(max-width:860px){.proofs{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.proofs{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq{
  margin-top:34px;border-top:1px solid var(--hair);
  background:#fff;border:1px solid var(--hair);border-radius:var(--radius);
  padding:6px clamp(18px,3vw,32px);
  box-shadow:0 1px 2px rgba(var(--ink-rgb),.04);
}
.faq details{border-bottom:1px solid var(--hair)}
.faq details:last-child{border-bottom:0}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 0;
  font-family:var(--serif);font-weight:600;font-size:clamp(16px,1.6vw,20px);
  display:flex;justify-content:space-between;align-items:baseline;gap:20px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-family:var(--mono);font-size:20px;opacity:.45;flex-shrink:0;
}
.faq details[open] summary::after{content:"–"}
.faq .a{
  padding:0 0 22px;max-width:46em;
  font-size:15px;opacity:.85;line-height:1.8;
}

/* ---------- 胶囊标签 / 场景钩子 ---------- */
.pill{
  display:inline-block;font-family:var(--mono);font-size:11px;
  letter-spacing:.2em;text-transform:uppercase;
  padding:6px 14px;border-radius:999px;
  border:1px solid var(--hair-strong);opacity:.85;
}
.light .pill.amber,.amber.pill{border-color:var(--amber);background:var(--amber-soft);opacity:1}
.dark .pill{border-color:rgba(var(--paper-rgb),.4)}
.hook{
  font-family:var(--serif);font-size:clamp(15px,1.6vw,20px);
  line-height:1.7;opacity:.85;margin-top:20px;
}
.hook strong{opacity:1}

/* ---------- 对话样例（借「AI 霖子」最强手法：教练感前置体验）---------- */
.talk{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.6vw,34px);margin-top:36px;
}
.chat{
  background:#fff;border:1px solid var(--hair);border-radius:var(--radius);
  padding:22px 22px 18px;display:flex;flex-direction:column;gap:14px;
  box-shadow:0 1px 2px rgba(var(--ink-rgb),.04);min-width:0;
}
.chat-head{display:flex;flex-direction:column;gap:10px}
.chat-head h3{font-family:var(--serif);font-weight:700;font-size:clamp(16px,1.55vw,19px);line-height:1.4}
.bubble{
  max-width:88%;padding:12px 16px;border-radius:16px;
  font-size:14px;line-height:1.7;
}
.bubble.them{
  align-self:flex-start;background:var(--paper-tint);
  border-bottom-left-radius:4px;opacity:.92;
}
.bubble.me{
  align-self:flex-end;background:var(--ink);color:var(--paper);
  border-bottom-right-radius:4px;
}
.bubble.me strong{color:var(--amber)}
.chat-foot{
  margin-top:auto;padding-top:12px;border-top:1px dashed var(--hair);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;opacity:.5;
}
@media(max-width:960px){.talk{grid-template-columns:1fr}}

/* ---------- 入场动效 ---------- */
[data-anim]{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
[data-anim].in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  [data-anim]{opacity:1;transform:none;transition:none}
}