/* =========================================================
   王树江 · AIGC 江哥 —— 讲师业务展示站
   设计令牌
   ========================================================= */
:root{
  --paper:#F2F3F4;
  --paper-2:#E8EAEC;
  --card:#FFFFFF;
  --ink:#111619;
  --ink-2:#49535B;
  --ink-3:#7F8991;
  --forest:#16211E;
  --forest-2:#243531;
  --honey:#BE7F3C;
  --honey-soft:#F1E3D2;
  --mint:#79CFA4;
  --mint-soft:#E4F2EA;
  --line:#DDE1E3;
  --line-2:#E8EBED;
  --shadow-s:0 1px 2px rgba(17,22,25,.05),0 6px 18px -8px rgba(17,22,25,.10);
  --shadow-m:0 2px 6px rgba(17,22,25,.05),0 24px 50px -22px rgba(17,22,25,.22);
  --shadow-l:0 40px 80px -30px rgba(17,22,25,.28);
  --r-s:10px; --r-m:16px; --r-l:24px;
  --nav-h:70px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--mint);color:var(--forest)}

.wrap{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.wrap-narrow{width:min(880px,calc(100% - 48px));margin-inline:auto}

/* ---------- 通用排版 ---------- */
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;font-weight:500;
  text-transform:uppercase;color:var(--honey);display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"//";font-family:var(--font-mono);color:var(--mint);font-weight:700;letter-spacing:0}
.eyebrow::after{content:"";height:1px;width:26px;background:currentColor;opacity:.28}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;font-weight:800}
h1{font-size:clamp(32px,4.5vw,54px);letter-spacing:-.03em;line-height:1.2}
h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em}
h3{font-size:clamp(18px,2vw,22px)}
p{margin:0}
.lead{font-size:clamp(15px,1.4vw,17.5px);color:var(--ink-2);line-height:1.9}
.muted{color:var(--ink-3)}
.accent{color:var(--honey)}
mark{background:linear-gradient(transparent 62%,var(--honey-soft) 62%);color:inherit;padding:0 2px}

.section{padding:96px 0}
.section--tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{margin:14px 0 16px}
.hr{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:60;height:var(--nav-h);
  background:rgba(250,248,242,.82);backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s,background .3s;
}
.nav.is-stuck{border-bottom-color:var(--line);background:rgba(250,248,242,.94)}
.nav-in{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.01em}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:var(--forest);color:#fff;font-family:var(--font-serif);font-size:17px;font-weight:700;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.18);
}
.brand-txt small{display:block;font-size:10.5px;letter-spacing:.2em;color:var(--ink-3);font-weight:600;text-transform:uppercase;line-height:1.4}
.brand-txt b{font-size:15.5px;line-height:1.2;display:block}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;padding:9px 15px;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--forest);background:var(--paper-2)}
.nav-links a.is-active{color:var(--forest);background:var(--mint-soft)}
.nav-right{display:flex;align-items:center;gap:10px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:999px;font-size:14.5px;font-weight:700;
  transition:transform .18s var(--ease),background .2s,color .2s,box-shadow .2s;white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn--primary{background:var(--forest);color:#fff;box-shadow:var(--shadow-s)}
.btn--primary:hover{background:var(--forest-2);box-shadow:var(--shadow-m)}
.btn--ghost{border:1px solid var(--line);color:var(--forest);background:rgba(255,255,255,.6)}
.btn--ghost:hover{border-color:var(--forest);background:#fff}
.btn--honey{background:var(--honey);color:#fff}
.btn--honey:hover{background:#c97b1f}
.btn--sm{height:36px;padding:0 15px;font-size:13.5px}
.btn--block{width:100%}

.user-chip{
  display:none;align-items:center;gap:9px;height:42px;padding:0 6px 0 6px;border-radius:999px;
  border:1px solid var(--line);background:#fff;font-size:13.5px;font-weight:600;
}
.user-chip.is-on{display:inline-flex}
.user-chip .avatar{
  width:30px;height:30px;border-radius:50%;background:var(--mint);color:var(--forest);
  display:grid;place-items:center;font-weight:800;font-size:12.5px;flex:0 0 auto;
}
.user-chip .u-name{max-width:96px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.user-chip .u-out{padding:0 8px;color:var(--ink-3);font-size:12.5px}
.user-chip .u-out:hover{color:var(--honey)}

.burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;place-items:center}
.burger span{display:block;width:17px;height:1.6px;background:var(--forest);margin:3.4px 0;transition:transform .25s,opacity .2s}
.burger.is-open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.mobile-menu{
  position:fixed;inset:var(--nav-h) 0 0;z-index:55;background:var(--paper);
  padding:24px;display:none;flex-direction:column;gap:2px;
}
.mobile-menu.is-open{display:flex;animation:fade .28s var(--ease)}
.mobile-menu a{
  padding:16px 6px;font-size:20px;font-weight:700;border-bottom:1px solid var(--line-2);
  display:flex;justify-content:space-between;align-items:center;
}
.mobile-menu a span{font-size:12px;color:var(--ink-3);font-weight:600;letter-spacing:.1em}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(28px,5vw,64px) 0 clamp(40px,6vw,80px)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(760px 540px at 74% 32%,rgba(121,207,164,.20),transparent 66%),
    radial-gradient(560px 460px at 90% 78%,rgba(190,127,60,.10),transparent 70%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1.02fr;gap:clamp(24px,4vw,56px);align-items:center}
.hero-copy .eyebrow{margin-bottom:20px}
.hero h1{margin-bottom:22px}
.hero h1 em{
  font-style:normal;color:var(--forest);white-space:nowrap;
  background:linear-gradient(transparent 64%,rgba(190,127,60,.30) 64%);
  padding:0 .04em;
}
.hero-sub{max-width:430px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.tag{
  font-size:12.5px;font-weight:700;letter-spacing:.02em;padding:7px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);
}
.tag--mint{background:var(--mint-soft);border-color:#CBEBDA;color:var(--forest)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-stage{position:relative;display:flex;flex-direction:column;align-items:center;width:100%}
.sphere-hint{
  display:flex;align-items:center;justify-content:center;gap:9px;
  width:100%;max-width:100%;margin:10px auto 0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--ink-3);
  text-align:center;
}
.sphere-hint .dot{
  width:6px;height:6px;border-radius:50%;background:var(--mint);flex:0 0 auto;
  box-shadow:0 0 0 4px rgba(121,207,164,.28);animation:pulse 2.4s infinite;
}
.sphere-hint::after{content:"";width:26px;height:1px;background:var(--line);flex:0 0 auto}
@media (max-width:720px){ .sphere-hint{font-size:11.5px;letter-spacing:.04em;margin-top:6px} }

/* ---------- 3D 球体 ---------- */
.sphere-stage{
  position:relative;width:100%;aspect-ratio:1/1;max-height:min(72vh,660px);
  margin-inline:auto;touch-action:pan-y;cursor:grab;user-select:none;
  display:grid;place-items:center;
  perspective:1050px;perspective-origin:50% 50%;
}
.sphere-stage.is-dragging{cursor:grabbing}
.sphere-stage::after{
  content:"";position:absolute;width:56%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(143,227,184,.34),rgba(143,227,184,0) 68%);
  filter:blur(6px);pointer-events:none;
}
.sphere{
  position:relative;width:100%;height:100%;
  transform-style:preserve-3d;will-change:transform;
}
.ph{
  position:absolute;left:50%;top:50%;
  margin-left:calc(var(--cw,126px) / -2);
  margin-top:calc(var(--cw,126px) * -0.375);
  width:var(--cw,126px);aspect-ratio:4/3;border-radius:12px;overflow:hidden;
  background:var(--paper-2);
  border:3px solid rgba(255,255,255,.95);
  box-shadow:0 10px 26px -12px rgba(17,22,25,.42),0 1px 0 rgba(255,255,255,.9) inset;
  transform-origin:50% 50%;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  transition:opacity .18s linear;
  will-change:transform,opacity;
}
.ph img{width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none;color:transparent;font-size:0}
.ph::after{
  content:"";position:absolute;inset:0;border-radius:9px;box-shadow:inset 0 0 0 1px rgba(13,42,32,.08);
  pointer-events:none;
}
.ph:hover{box-shadow:0 18px 40px -14px rgba(13,42,32,.55)}
.sphere-badge{
  position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);
  font-size:11.5px;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase;
  display:flex;align-items:center;gap:8px;white-space:nowrap;pointer-events:none;
}
.sphere-badge::before,.sphere-badge::after{content:"";width:24px;height:1px;background:var(--line)}

/* ---------- 数据条 ---------- */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.45)}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:26px 18px;border-right:1px solid var(--line);text-align:center}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--font-serif);font-size:clamp(26px,3.2vw,38px);line-height:1.1;color:var(--forest);letter-spacing:-.02em}
.stat span{font-size:12.5px;color:var(--ink-3);letter-spacing:.06em}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);
  padding:26px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;
  min-width:0;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-m);border-color:#D8D0BB}
.card h3{margin-bottom:10px}
.card p{font-size:14.5px;color:var(--ink-2)}

.card-num{
  font-family:var(--font-serif);font-style:italic;font-size:13px;color:var(--honey);
  letter-spacing:.1em;margin-bottom:16px;display:block;
}

.photo-card{
  position:relative;border-radius:var(--r-m);overflow:hidden;background:var(--paper-2);
  border:1px solid var(--line);cursor:pointer;aspect-ratio:4/3;
}
.photo-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.photo-card:hover img{transform:scale(1.04)}
.photo-card figcaption{
  position:absolute;inset:auto 0 0;padding:14px 16px;color:#fff;font-size:13px;line-height:1.5;
  background:linear-gradient(transparent,rgba(8,28,20,.82));
}

/* 关于：头衔列表 */
.role-list{display:grid;gap:0;border-top:1px solid var(--line)}
.role-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  padding:16px 4px;border-bottom:1px solid var(--line);
}
.role-row b{font-size:15.5px;font-weight:700}
.role-row span{font-size:13.5px;color:var(--honey);font-weight:700;white-space:nowrap}

.pill-list{display:flex;flex-wrap:wrap;gap:9px}
.pill{
  font-size:13.5px;font-weight:600;padding:9px 16px;border-radius:999px;
  background:var(--mint-soft);color:var(--forest);border:1px solid #CFEEDD;
}

/* 证书卡 */
.cert{
  display:flex;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-s);padding:12px;transition:box-shadow .25s,transform .25s;
}
.cert:hover{box-shadow:var(--shadow-s);transform:translateY(-2px)}
.cert img{width:84px;height:62px;object-fit:cover;border-radius:7px;flex:0 0 auto;background:var(--paper-2)}
.cert b{display:block;font-size:14px;line-height:1.45}
.cert small{color:var(--ink-3);font-size:12px}

/* 书籍 */
.book{
  display:grid;grid-template-columns:170px 1fr;gap:22px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:20px;
  transition:box-shadow .3s,transform .3s var(--ease);
}
.book:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.book-cover{aspect-ratio:3/4;border-radius:8px;overflow:hidden;background:var(--paper-2);cursor:pointer}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book-meta{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.badge{font-size:11.5px;font-weight:700;padding:4px 9px;border-radius:6px;background:var(--mint-soft);color:var(--forest);letter-spacing:.03em}
.badge--honey{background:var(--honey-soft);color:#8A4E0B}
.book h3{font-size:18px;margin-bottom:8px}
.book p{font-size:13.8px;color:var(--ink-2)}

.book-v{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;display:flex;flex-direction:column;transition:transform .3s var(--ease),box-shadow .3s}
.book-v:hover{transform:translateY(-3px);box-shadow:var(--shadow-m)}
.book-v .cover{aspect-ratio:3/4;overflow:hidden;background:var(--paper-2);cursor:pointer}
.book-v .cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.book-v:hover .cover img{transform:scale(1.03)}
.book-v .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;min-width:0}
.book-v h3{font-size:16.5px;line-height:1.45}
.book-v p{font-size:13.5px;color:var(--ink-2);line-height:1.75}

/* 时间线 */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-item{position:relative;padding:0 0 26px}
.tl-item::before{
  content:"";position:absolute;left:-26px;top:8px;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2px solid var(--honey);box-shadow:0 0 0 3px var(--paper);
}
.tl-date{font-family:var(--font-serif);font-size:13px;letter-spacing:.06em;color:var(--honey);font-weight:700}
.tl-item b{display:block;font-size:16px;margin:3px 0 4px}
.tl-item p{font-size:14px;color:var(--ink-2)}

/* 培训案例卡 */
.sess{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;
  display:flex;flex-direction:column;transition:box-shadow .3s,transform .3s var(--ease);
}
.sess:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.sess-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2);position:relative}
.sess-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.sess:hover .sess-thumb img{transform:scale(1.05)}
.sess-count{
  position:absolute;right:10px;bottom:10px;background:rgba(13,42,32,.78);color:#fff;
  font-size:11.5px;padding:4px 9px;border-radius:999px;backdrop-filter:blur(4px);
}
.sess-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:7px;flex:1}
.sess-date{font-family:var(--font-serif);font-size:12.5px;color:var(--honey);letter-spacing:.06em;font-weight:700}
.sess-body h3{font-size:16px;line-height:1.45}
.sess-org{font-size:13px;color:var(--ink-3);font-weight:600}
.sess-note{font-size:13.5px;color:var(--ink-2);margin-top:2px}

/* 图片墙 */
.wall{columns:4;column-gap:14px}
.wall figure{margin:0 0 14px;break-inside:avoid;border-radius:10px;overflow:hidden;cursor:pointer;position:relative;background:var(--paper-2)}
.wall img{width:100%;transition:transform .5s var(--ease)}
.wall figure:hover img{transform:scale(1.04)}
.wall figure::after{
  content:"";position:absolute;inset:0;background:rgba(13,42,32,0);transition:background .3s;
}
.wall figure:hover::after{background:rgba(13,42,32,.06)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.info-card{background:var(--forest);color:#EAF3EE;border-radius:var(--r-l);padding:34px;box-shadow:var(--shadow-l);position:relative;overflow:hidden}
.info-card::before{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(143,227,184,.35),transparent 70%);
}
.info-card h3{color:#fff;margin-bottom:18px}
.info-row{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:14px}
.info-row span{color:#A9C4B8;font-size:12.5px;letter-spacing:.06em}
.info-row b{font-weight:700}
.info-card a.btn{margin-top:24px}

.form{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:30px;box-shadow:var(--shadow-s)}
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--ink-3);margin-bottom:7px}
.input,.textarea,.select{
  width:100%;border:1px solid var(--line);background:var(--paper);border-radius:10px;
  padding:12px 14px;font:inherit;font-size:14.5px;color:var(--ink);transition:border-color .2s,background .2s;
}
.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--forest);background:#fff}
.textarea{min-height:110px;resize:vertical}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:12px}
.form-msg{font-size:13.5px;margin-top:14px;padding:11px 14px;border-radius:10px;display:none}
.form-msg.is-on{display:block}
.form-msg.ok{background:var(--mint-soft);color:var(--forest)}
.form-msg.err{background:#FBEAE4;color:#9B3A17}

/* 收藏列表 */
.fav-list{display:grid;gap:10px;margin-top:16px}
.fav-item{display:flex;gap:12px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px}
.fav-item img{width:60px;height:46px;object-fit:cover;border-radius:6px}
.fav-item p{font-size:13px;line-height:1.45;flex:1}
.fav-item button{color:var(--ink-3);font-size:12px;padding:6px}
.fav-item button:hover{color:var(--honey)}

/* ---------- 页脚 ---------- */
.footer{background:var(--forest);color:#C9DCD4;padding:64px 0 30px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.14)}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px;letter-spacing:.02em}
.footer a{color:#C9DCD4;font-size:14px;display:block;padding:5px 0;transition:color .2s}
.footer a:hover{color:var(--mint)}
.footer-brand b{color:#fff;font-size:19px;letter-spacing:-.01em}
.footer-brand p{font-size:13.5px;color:#9FB8AC;margin-top:10px;max-width:320px;line-height:1.8}
.footer-bot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#8FA89C}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:120;display:none;place-items:center;
  background:rgba(8,26,19,.94);backdrop-filter:blur(10px);padding:24px;
}
.lightbox.is-open{display:grid;animation:fade .25s var(--ease)}
.lb-stage{max-width:min(1100px,100%);display:flex;flex-direction:column;align-items:center;gap:18px}
.lb-img{
  max-width:100%;max-height:min(74vh,780px);border-radius:14px;object-fit:contain;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.8);background:#0b1f17;
}
.lb-cap{
  color:#fff;font-size:clamp(15px,1.8vw,19px);font-weight:600;letter-spacing:.02em;text-align:center;
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:center;
}
.lb-cap .idx{font-family:var(--font-serif);font-size:12.5px;color:var(--mint);letter-spacing:.14em}
.lb-tools{display:flex;gap:10px;align-items:center}
.lb-btn{
  height:38px;padding:0 16px;border-radius:999px;border:1px solid rgba(255,255,255,.28);
  color:#fff;font-size:13.5px;font-weight:600;display:inline-flex;align-items:center;gap:7px;
  transition:background .2s,border-color .2s,color .2s;
}
.lb-btn:hover{background:rgba(255,255,255,.14);border-color:#fff}
.lb-btn.is-fav{background:var(--honey);border-color:var(--honey);color:#fff}
.lb-close{position:absolute;top:20px;right:22px;width:44px;height:44px;border-radius:50%;color:#fff;background:rgba(255,255,255,.12);display:grid;place-items:center;font-size:20px}
.lb-close:hover{background:rgba(255,255,255,.24)}
.lb-nav{
  position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;
  background:rgba(255,255,255,.12);color:#fff;display:grid;place-items:center;font-size:18px;
}
.lb-nav:hover{background:rgba(255,255,255,.26)}
.lb-prev{left:18px}.lb-next{right:18px}

/* ---------- 登录弹层 ---------- */
.modal{position:fixed;inset:0;z-index:130;display:none;place-items:center;padding:20px;background:rgba(8,26,19,.55);backdrop-filter:blur(6px)}
.modal.is-open{display:grid;animation:fade .22s var(--ease)}
.modal-box{
  width:min(420px,100%);background:var(--paper);border-radius:var(--r-l);padding:30px;
  box-shadow:var(--shadow-l);position:relative;animation:pop .32s var(--ease);
}
.modal-box h3{font-size:22px;margin-bottom:6px}
.modal-box .sub{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
.modal-close{position:absolute;top:14px;right:16px;width:34px;height:34px;border-radius:50%;color:var(--ink-3);display:grid;place-items:center;font-size:18px}
.modal-close:hover{background:var(--paper-2);color:var(--ink)}
.otp-row{display:flex;gap:10px}
.otp-row .input{flex:1}
.otp-row .btn{flex:0 0 auto;height:46px;border-radius:10px;padding:0 16px;font-size:13.5px}
.divider{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--ink-3);font-size:12px}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
.err-tip{font-size:12.5px;color:#B4461F;margin-top:6px;min-height:0;display:none}
.err-tip.is-on{display:block}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .wall{columns:3}
}
@media (max-width:900px){
  /* 破折到单列：标题 → 球体 → 其余 */
  .hero-grid{grid-template-columns:1fr;gap:8px}
  .hero-copy{display:contents}
  .hero-copy > .eyebrow{order:0}
  .hero-copy > h1{order:1;margin-bottom:10px}
  .hero-rest{order:3}
  .hero-stage{order:2;margin:6px auto 10px;max-width:min(100%,520px)}
  .hero-sub{max-width:none}
  .sphere-stage{max-height:none;aspect-ratio:1/1}
  .nav-links{display:none}
  .burger{display:grid}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-in{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:720px){
  :root{--nav-h:62px}
  .wrap,.wrap-narrow{width:calc(100% - 36px)}
  .section{padding:64px 0}
  .section--tight{padding:44px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .wall{columns:2;column-gap:10px}
  .wall figure{margin-bottom:10px}
  .book{grid-template-columns:108px 1fr;gap:16px;padding:16px}
  .book h3{font-size:16px}
  .card{padding:22px}
  .lb-nav{display:none}
  .lb-img{max-height:62vh}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .hero-actions .btn{flex:1}
  .hide-sm{display:none}
}
@media (max-width:420px){
  .stats-in{grid-template-columns:1fr 1fr}
  .brand-txt small{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.001s!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 内页头 ---------- */
.page-head{
  position:relative;overflow:hidden;isolation:isolate;
  display:flex;align-items:center;
  min-height:clamp(380px,44vh,468px);
  padding:clamp(56px,6.4vw,92px) 0 clamp(46px,5vw,74px);
}
.page-head > .wrap{position:relative;z-index:1}
.page-head h1{font-size:clamp(30px,4.4vw,50px);margin:14px 0 16px}
.page-head .lead{max-width:600px}

/* 栏目顶部背景图：右侧主视觉 + 向左淡出，与导航/正文自然衔接 */
.page-head .head-media{
  position:absolute;top:0;right:0;bottom:0;z-index:-1;
  display:flex;justify-content:flex-end;pointer-events:none;
}
.page-head .head-media img{
  height:100%;width:auto;display:block;max-width:none;
  filter:contrast(1.03) saturate(1.06);
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.30) 20%,rgba(0,0,0,.82) 44%,#000 62%);
  mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.30) 20%,rgba(0,0,0,.82) 44%,#000 62%);
}
.page-head[data-bg]::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(242,243,244,.62) 0%,rgba(242,243,244,0) 20%,rgba(242,243,244,.10) 72%,var(--paper) 100%),
    linear-gradient(90deg,rgba(242,243,244,.90) 0%,rgba(242,243,244,.50) 30%,rgba(242,243,244,0) 56%);
}

@media (max-width:900px){
  .page-head{min-height:clamp(280px,38vh,380px)}
}
@media (max-width:720px){
  .page-head{min-height:clamp(250px,40vh,330px);padding:34px 0 42px}
  .page-head .head-media{width:100%}
  .page-head .head-media img{
    width:100%;height:100%;object-fit:cover;object-position:74% center;opacity:.78;
    filter:contrast(1.03) saturate(1.06);
    -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.30) 0%,#000 30%,#000 76%,rgba(0,0,0,.55) 100%);
    mask-image:linear-gradient(180deg,rgba(0,0,0,.30) 0%,#000 30%,#000 76%,rgba(0,0,0,.55) 100%);
  }
  .page-head[data-bg]::after{
    background:linear-gradient(180deg,rgba(242,243,244,.62) 0%,rgba(242,243,244,.58) 42%,rgba(242,243,244,.9) 88%,var(--paper) 100%);
  }
}
.split{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(28px,5vw,64px);align-items:start}
.sticky{position:sticky;top:calc(var(--nav-h) + 24px)}
.portrait{border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--paper-2);box-shadow:var(--shadow-m)}
.portrait img{width:100%;height:auto;max-height:min(70vh,600px);object-fit:cover;object-position:50% 18%}
.portrait-cap{font-size:12.5px;color:var(--ink-3);margin-top:12px;letter-spacing:.04em}
.honor{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;display:flex;flex-direction:column}
.honor img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--paper-2)}
.honor div{padding:16px 18px 20px}
.honor .yr{font-family:var(--font-serif);color:var(--honey);font-size:12.5px;letter-spacing:.08em;font-weight:700}
.honor h3{font-size:15.5px;margin:6px 0 6px;line-height:1.5}
.honor p{font-size:13.5px;color:var(--ink-2)}
@media (max-width:900px){
  .split{grid-template-columns:1fr;gap:28px}
  .sticky{position:static}
}


/* =========================================================
   背景语言：浅灰网格 + 1024 + Buddy（程序员节）
   ========================================================= */
.page-bg{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.pg-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(17,22,25,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(17,22,25,.035) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(130% 95% at 50% 0%,#000 26%,transparent 76%);
  mask-image:radial-gradient(130% 95% at 50% 0%,#000 26%,transparent 76%);
}
.pg-glow{position:absolute;border-radius:50%;filter:blur(10px)}
.pg-glow-a{width:60vw;height:60vw;right:-16vw;top:-24vw;background:radial-gradient(circle,rgba(121,207,164,.30),transparent 66%)}
.pg-glow-b{width:46vw;height:46vw;left:-16vw;bottom:-20vw;background:radial-gradient(circle,rgba(190,127,60,.16),transparent 68%)}
.pg-num{
  position:absolute;right:-3vw;bottom:-11vw;
  font-family:var(--font-mono);font-size:min(38vw,520px);line-height:.78;letter-spacing:-.06em;
  color:rgba(17,22,25,.032);font-weight:800;user-select:none;
}
.pg-braces{
  position:absolute;left:-1.4vw;top:14vh;
  font-family:var(--font-mono);font-size:min(22vw,300px);line-height:1;
  color:rgba(17,22,25,.026);font-weight:300;letter-spacing:-.04em;user-select:none;
}
.pg-bin{
  position:absolute;top:0;bottom:0;width:1.2em;overflow:hidden;
  font-family:var(--font-mono);font-size:11px;line-height:1.75;letter-spacing:.4em;
  color:rgba(17,22,25,.055);word-break:break-all;white-space:pre-wrap;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 18%,#000 74%,transparent);
  mask-image:linear-gradient(180deg,transparent,#000 18%,#000 74%,transparent);
}
.pg-bin-a{left:14px}
.pg-bin-b{right:14px}
@media (max-width:900px){
  .pg-bin{display:none}
  .pg-num{font-size:52vw;bottom:-6vw}
  .pg-braces{display:none}
}

/* Buddy 元素 */
.buddy{display:inline-flex;align-items:center;gap:9px;color:var(--ink-3);font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em}
.buddy svg{width:26px;height:26px;flex:0 0 auto}
.buddy-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px}
.buddy-chip{
  display:inline-flex;align-items:center;gap:7px;padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.7);color:var(--ink-2);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
}
.buddy-chip b{color:var(--forest)}
.footer .buddy{color:#8FA79B}

/* 矮屏（笔记本 1366×768 / 1080×600 等）压缩首屏，保证球体与说明同屏 */
@media (max-height:720px) and (min-width:901px){
  .hero{padding-top:16px;padding-bottom:28px}
  .hero h1{margin-bottom:14px}
  .hero-sub{margin-bottom:16px;font-size:15px;line-height:1.8}
  .hero-tags{margin-bottom:18px}
  .hero-copy .eyebrow{margin-bottom:14px}
  .hero-stage{margin-top:0}
  .sphere-hint{margin-top:4px}
  .hero-grid{align-items:center}
}
/* 矮屏 + 单列（手机横屏 / 小平板） */
@media (max-height:640px) and (max-width:900px){
  .hero{padding-top:10px;padding-bottom:20px}
  .hero-stage{max-width:min(100%,380px)}
}


/* ---------- 联系页：浅色信息卡 ---------- */
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  padding:clamp(24px,3vw,34px);box-shadow:var(--shadow-s);
  position:sticky;top:calc(var(--nav-h) + 24px);
}
.contact-card h3{margin:12px 0 2px;font-size:20px}
.contact-rows{margin:16px 0 22px}
.contact-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px solid var(--line-2);font-size:14px;
}
.contact-row:last-child{border-bottom:0;padding-bottom:2px}
.contact-row span{color:var(--ink-3);font-size:12.5px;letter-spacing:.04em}
.contact-row b{color:var(--forest);font-weight:700;text-align:right}
.contact-note{font-size:12px;color:var(--ink-3);line-height:1.75;margin-top:14px}

/* ---------- 首页 CTA 横幅（浅色 + 背景图） ---------- */
.cta-band{
  position:relative;overflow:hidden;isolation:isolate;border-radius:24px;
  border:1px solid var(--line);
  background:linear-gradient(112deg,#FBFCFC 0%,#F3F6F5 52%,#E9F1ED 100%);
  padding:clamp(34px,4.6vw,58px) clamp(26px,4vw,56px);
}
.cta-band .cta-media{
  position:absolute;top:0;right:0;bottom:0;height:100%;width:auto;max-width:none;z-index:-1;
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.30) 32%,#000 60%);
  mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.30) 32%,#000 60%);
}
.cta-inner{position:relative;max-width:900px}
.cta-inner h2{
  color:var(--forest);margin:12px 0 14px;white-space:nowrap;
  font-size:clamp(25px,2.55vw,36px);letter-spacing:-.02em;
}
.cta-lead{color:var(--ink-2);font-size:15.5px;line-height:1.9;margin-bottom:26px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

@media (max-width:900px){
  .contact-card{position:static}
  .cta-inner h2{white-space:normal}
}
@media (max-width:720px){
  .cta-band .cta-media{opacity:.5}
  .cta-lead{font-size:14.5px}
}