/* =================================================================
   DESIGN TOKENS · 蓝主导 · 冷调 ink · 暖金点缀
   ================================================================= */
:root{
  /* sky gradient */
  --night-0:#050B22;
  --night-1:#0E1F4D;
  --night-2:#1A3A7A;
  --blue:#2D4FAF;
  --blue-2:#5984D6;
  --blue-soft:#8FAAD5;
  --dusk:#B59FBE;
  --sunset:#E89970;
  --sunset-2:#F2B58F;
  --dawn:#FAD0B0;

  /* surfaces */
  --paper:#F7F2E8;
  --paper-2:#EFE7D5;
  --paper-3:#E4DBC1;

  /* cool ink (less warm-brown, more tech) */
  --ink:#0E1218;
  --ink-soft:#2A3142;
  --ink-mute:#5C6577;
  --line-soft:rgba(14,18,24,.10);
  --line:rgba(14,18,24,.16);

  /* accents (blue dominant, gold warm, red minimal) */
  --accent:#4A75E5;
  --accent-deep:#1E3A7A;
  --gold:#D4A858;
  --gold-light:#E8C97C;
  --red:#C8472C;  /* almost retired — used only on tiny dot/details */

  /* fonts */
  --serif:'Noto Serif SC','Source Han Serif SC',serif;
  --sans:'Noto Sans SC','Source Han Sans SC','PingFang SC','Inter',sans-serif;
  --latin:'Cormorant Garamond','Georgia',serif;
  --mono:'JetBrains Mono','SFMono-Regular',monospace;
  --hand-cn:'Ma Shan Zheng',cursive;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{
  background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-weight:400;
  line-height:1.75;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  cursor:default;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--accent);color:#fff}

/* =================================================================
   NAV · pill, frosted glass
   ※ 已移除重复定义 · 统一由 site.css 提供 nav.top / nav .wordmark / nav ul / nav .nav-cta
   ※ 这样 index.html 跟所有子页面的 nav 样式完全一致
   ================================================================= */

/* =================================================================
   HERO · night→dawn gradient + stars + meteors + cursor sparks
   ================================================================= */
.hero{
  position:relative;min-height:115vh;overflow:hidden;
  background:linear-gradient(180deg,
    var(--night-0) 0%,
    var(--night-1) 18%,
    var(--night-2) 38%,
    var(--blue) 55%,
    var(--blue-2) 70%,
    var(--dusk) 82%,
    var(--sunset-2) 94%,
    var(--dawn) 100%
  );
  display:grid;align-items:center;
  padding:140px 8vw 60px;
  cursor:none;  /* hide native cursor — replaced by sparkle */
}
@media (max-width:900px){.hero{min-height:100vh;padding:120px 6vw 50px}}
@media (max-width:560px){.hero{min-height:100vh;padding:110px 5vw 40px;cursor:auto}}

/* SVG noise grain overlay (the "real starry sky" feel) */
.hero::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='280' height='280'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1, 0 0 0 0 1, 0 0 0 0 1, 0 0 0 0.18 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode:overlay;opacity:.55;
}

#stars{position:absolute;inset:0;width:100%;height:100%;z-index:3}

/* meteors · JS spawns these dynamically — random start/angle/length/speed */
.meteors{position:absolute;inset:0;z-index:4;pointer-events:none;overflow:hidden}
.meteor{
  position:absolute;
  height:1.5px;
  /* head BRIGHT at LEFT end (where anchor is), tail fades to transparent at RIGHT */
  background:linear-gradient(90deg, #fff 0%, rgba(220,235,255,.85) 8%, rgba(180,210,255,.4) 50%, transparent 100%);
  border-radius:999px;
  filter:drop-shadow(0 0 4px rgba(180,210,255,.85)) drop-shadow(0 0 10px rgba(120,180,255,.35));
  transform-origin:0% 50%;  /* rotate around the head */
  opacity:0;
  pointer-events:none;
  will-change:transform,opacity,left,top;
}
.meteor::before{
  /* bright head dot at LEFT end */
  content:"";position:absolute;
  left:0;top:50%;
  width:5px;height:5px;
  background:#fff;border-radius:99px;
  transform:translate(-50%,-50%);
  box-shadow:0 0 8px rgba(255,255,255,.95), 0 0 18px rgba(180,210,255,.65), 0 0 28px rgba(120,170,255,.3);
}

/* constellations — distributed across hero for balanced composition */
.constellation{
  position:absolute;z-index:5;pointer-events:none;
}
.constellation svg{width:100%;height:100%}
.constellation .dot{fill:#fff;filter:drop-shadow(0 0 6px rgba(180,210,255,.85))}
.constellation .line{stroke:rgba(255,255,255,.18);stroke-width:1;fill:none}
/* c1 · top-right (主角，最大) */
.constellation.c1{top:7%;right:5%;width:220px;height:150px;opacity:.55}
/* c2 · top-left (W 形, 仙后座感) */
.constellation.c2{top:11%;left:6%;width:200px;height:120px;opacity:.45}
/* c3 · middle-left, 偏下（北斗七星感） */
.constellation.c3{top:58%;left:3%;width:180px;height:130px;opacity:.4}
/* c4 · bottom-right(小三角点缀) */
.constellation.c4{bottom:18%;right:9%;width:140px;height:100px;opacity:.35}
@media (max-width:1200px){.constellation.c1{width:180px;height:124px}.constellation.c2{width:170px;height:100px}.constellation.c3{width:150px;height:110px}}
@media (max-width:900px){
  .constellation.c1{top:6%;right:4%;width:140px;height:96px;opacity:.4}
  .constellation.c2{top:9%;left:4%;width:130px;height:80px;opacity:.35}
  .constellation.c3,.constellation.c4{display:none}
}
@media (max-width:560px){.constellation{display:none}}

/* hero content
   hero 高 115vh + align-items:center 会让内容中心落在 57.5vh（偏下半屏）。
   transform 上移 7.5vh，让视觉重心回到屏幕真正的中央 50vh。 */
.hero-inner{position:relative;z-index:10;max-width:1300px;margin:0 auto;width:100%;text-align:center;color:#fff;transform:translateY(-7.5vh)}
@media (max-width:900px){.hero-inner{transform:none}}  /* 小屏 hero 已是 100vh，无需上移 */

.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 18px;
  background:rgba(20,32,68,.35);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border:1px solid rgba(255,255,255,.18);
  border-radius:99px;
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:rgba(255,255,255,.82);margin-bottom:54px;
  font-weight:400;
}
.hero-badge .dot{width:6px;height:6px;background:#A8C8FF;border-radius:99px;box-shadow:0 0 8px #A8C8FF;animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{opacity:.7}50%{opacity:1}}
.hero-badge strong{color:#fff;font-weight:500}

.hero h1{
  font-family:var(--sans);font-weight:500;
  /* clamp 上限从 128px → 108px，避免中等 viewport（1100-1400）字号过大撑出双行错位 */
  font-size:clamp(44px,6.8vw,108px);line-height:1.08;letter-spacing:0;
  color:#fff;margin-bottom:46px;
  text-wrap:balance;
}
/* 两行用 block 强制断行（设计意图），但每行内 nowrap 防"从少年开始"再次折成"从少年/开始" */
.hero h1 .l1{display:block;white-space:nowrap;margin-bottom:0}  /* 去掉 6px gap → 两行紧贴一体 */
.hero h1 .l2{display:block;white-space:nowrap}
@media (max-width:560px){.hero h1{font-size:clamp(36px,10vw,62px);margin-bottom:34px}}
.hero h1 .swap{
  display:inline-block;min-width:2.4ch;text-align:center;
  color:var(--gold-light);font-weight:500;
  position:relative;transition:opacity .25s ease,transform .25s ease;
  margin-left:.06em;letter-spacing:.01em;
  vertical-align:baseline;
}
.hero h1 .swap::after{
  content:"";position:absolute;left:50%;bottom:-2px;
  width:2.6ch;height:2px;transform:translateX(-50%);
  background:linear-gradient(90deg,transparent,var(--gold-light),transparent);
  opacity:.6;
}
.hero h1 .swap.out{opacity:0;transform:translateY(-6px)}

/* 移动端：取消 translateY 让位移，避免 fade 中间帧错位（用户截图反馈）
   也跟随 prefers-reduced-motion 自动禁用 */
@media (max-width:560px){
  .hero h1 .swap{transition:opacity .2s ease}
  .hero h1 .swap.out{transform:none}
}
@media (prefers-reduced-motion:reduce){
  .hero h1 .swap{transition:none}
  .hero h1 .swap.out{transform:none}
}

.hero-lede{
  max-width:640px;margin:0 auto 50px;
  font-size:clamp(14px,1.25vw,18px);line-height:1.95;
  color:rgba(255,255,255,.82);font-weight:400;letter-spacing:.02em;
}
.hero-lede p{margin-bottom:6px}
.hero-lede em{font-style:normal;color:#fff;font-weight:500;letter-spacing:.06em}
.hero-lede .sep{display:block;width:24px;height:1px;background:rgba(255,255,255,.3);margin:14px auto}
@media (max-width:560px){
  .hero-badge{font-size:10.5px;letter-spacing:.14em;padding:6px 14px;margin-bottom:38px}
  .hero-lede{margin-bottom:36px}
  .hero-cta{flex-direction:column;align-items:stretch;gap:10px}
  .hero-cta .btn{width:100%;text-align:center;justify-content:center}
}

.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:99px;
  font-family:var(--sans);font-size:13.5px;font-weight:500;letter-spacing:.05em;
  transition:all .25s ease;cursor:pointer;
}
.btn.light{background:#fff;color:var(--ink)}
.btn.light:hover{background:var(--gold-light);transform:translateY(-1px)}
.btn.frosted{
  background:rgba(255,255,255,.1);color:#fff;
  border:1px solid rgba(255,255,255,.25);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
}
.btn.frosted:hover{background:rgba(255,255,255,.22);transform:translateY(-1px)}
.btn.accent{background:var(--accent);color:#fff}
.btn.accent:hover{background:#3D60BD;transform:translateY(-1px)}
.btn.ink{background:var(--ink);color:#fff}
.btn.ink:hover{background:var(--accent-deep)}
.btn.ghost-ink{border:1px solid var(--ink);color:var(--ink)}
.btn.ghost-ink:hover{background:var(--ink);color:#fff}

.scroll-cue{
  position:absolute;left:50%;bottom:36px;transform:translateX(-50%);z-index:10;
  color:rgba(255,255,255,.55);font-family:var(--mono);font-size:11px;letter-spacing:.3em;text-align:center;
}
.scroll-cue::after{
  content:"";display:block;width:1px;height:32px;margin:12px auto 0;
  background:linear-gradient(to bottom,rgba(255,255,255,.55),transparent);
  animation:cue 2.4s ease-in-out infinite;transform-origin:top;
}
@keyframes cue{0%,100%{transform:scaleY(.3)}50%{transform:scaleY(1)}}

/* cursor comet trail · canvas overlay covering hero only */
#cursorCanvas{
  position:fixed;inset:0;width:100%;height:100%;
  pointer-events:none;z-index:9999;
  mix-blend-mode:screen;
  opacity:0;transition:opacity .3s ease;
}
#cursorCanvas.on{opacity:1}

/* =================================================================
   LETTER ZONE · fixed-positioned card, scroll-driven scale
   Card appears as zone enters viewport (peek from bottom),
   scales up smoothly, holds, then exits up.
   ================================================================= */
.letter-zone{
  position:relative;height:200vh;  /* 信变长后 fixed card 需要更多滚动空间，避免下方 marquee-wrap 米色区盖住卡片底部 */
  background:linear-gradient(180deg,
    var(--dawn) 0%,
    var(--sunset-2) 14%,
    var(--dusk) 30%,
    var(--blue-soft) 44%,
    var(--blue-2) 58%,
    var(--blue) 72%,
    var(--night-2) 86%,
    var(--night-1) 100%
  );
  perspective:1400px;
}
.letter-zone::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(1px 1px at 20% 50%, rgba(255,255,255,.55), transparent),
    radial-gradient(1px 1px at 73% 65%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 45% 75%, rgba(255,255,255,.6), transparent),
    radial-gradient(1px 1px at 88% 85%, rgba(255,255,255,.4), transparent),
    radial-gradient(1px 1px at 10% 90%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 60% 95%, rgba(255,255,255,.4), transparent);
  pointer-events:none;
}

.letter-card{
  position:fixed;
  top:50%;left:50%;
  width:min(720px, 92vw);
  background:#FBF7EB;
  border-radius:8px;
  padding:42px 56px 46px;
  box-shadow:
    0 60px 120px -40px rgba(0,0,0,.45),
    0 20px 40px -20px rgba(0,0,0,.25),
    inset 0 1px 0 rgba(255,255,255,.7);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(14,18,24,.06) 1px, transparent 1px);
  background-size:14px 14px;
  background-color:#FBF7EB;
  z-index:50;
  pointer-events:none;
  opacity:0;
  overflow:visible;
  will-change:transform,opacity;
  /* initial: visible TOP-LEFT corner, sitting HIGHER (yPercent 48 instead of 56) */
  transform:translate(-50%, calc(-50% + 48vh)) scale(.55) rotate(-9deg);
  transform-origin:50% 50%;
  transition:opacity .3s ease;
}
.letter-card.visible{pointer-events:auto;opacity:1}

/* tape at top */
.letter-tape{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%) rotate(-1deg);
  width:120px;height:28px;
  background:rgba(255,220,120,.55);
  border:1px solid rgba(255,200,90,.35);
  border-radius:2px;
  box-shadow:0 4px 8px rgba(0,0,0,.08);
}

/* Polaroid · floating portrait — clickable link to mentors.html */
.letter-polaroid{
  position:absolute;
  top:62%;right:-150px;  /* 往下挪 8%、往右挪 40px，避免遮挡正文 */
  width:172px;
  background:#fff;
  padding:11px 11px 34px;
  box-shadow:0 30px 50px -18px rgba(0,0,0,.45), 0 10px 20px -8px rgba(0,0,0,.22), 0 0 0 1px rgba(0,0,0,.05);
  transform:rotate(8deg);
  z-index:6;transition:transform .5s ease,box-shadow .35s ease;
  display:block;text-decoration:none;color:inherit;cursor:pointer;
}
.letter-polaroid:hover{transform:rotate(3deg) scale(1.04);box-shadow:0 40px 70px -22px rgba(0,0,0,.5), 0 14px 24px -10px rgba(0,0,0,.28), 0 0 0 1px rgba(74,117,229,.2)}
.letter-polaroid .meet-tip{
  position:absolute;left:50%;bottom:-32px;transform:translateX(-50%);
  font-family:var(--mono);font-size:9px;letter-spacing:.18em;color:var(--ink-mute);
  text-transform:uppercase;white-space:nowrap;
  opacity:0;transition:opacity .25s ease;
}
.letter-polaroid:hover .meet-tip{opacity:1}
.letter-polaroid .photo{
  width:100%;aspect-ratio:3/4;background:linear-gradient(135deg,#4A75E5 0%,#1E3A7A 60%,#0E1F4D 100%);
  display:grid;place-items:center;overflow:hidden;position:relative;
}
.letter-polaroid .photo img{
  width:100%;height:100%;object-fit:cover;display:block;
}
.letter-polaroid .photo .placeholder{
  font-family:var(--serif);color:rgba(255,255,255,.85);
  text-align:center;line-height:1.3;font-size:13px;letter-spacing:.04em;font-weight:500;
  padding:8px;
}
.letter-polaroid .photo .placeholder small{display:block;font-family:var(--mono);font-size:8.5px;letter-spacing:.18em;margin-top:6px;color:rgba(255,255,255,.55);text-transform:uppercase;font-weight:400}
.letter-polaroid .cap{
  font-family:var(--hand-cn);font-size:22px;color:var(--ink);
  text-align:center;margin-top:8px;line-height:1;letter-spacing:.04em;
}

.letter-title{
  text-align:center;font-family:var(--serif);
  font-size:22px;color:var(--ink);font-weight:500;letter-spacing:.02em;
  margin-bottom:36px;line-height:1.5;
}
.letter-title::after{
  content:"";display:block;width:40px;height:1px;background:var(--ink-mute);
  margin:18px auto 0;opacity:.4;
}

.letter-body{font-family:var(--serif);color:var(--ink-soft);font-size:14.5px;line-height:1.95;font-weight:400}
.letter-body p{margin-bottom:6px}
.letter-body p.space{margin-top:20px}
.letter-body p em{font-style:normal;color:var(--ink);font-weight:500;border-bottom:1px solid rgba(74,117,229,.35);padding-bottom:1px}
.letter-body p.closing{
  margin-top:12px;
  font-family:var(--serif);font-style:normal;font-size:13.5px;line-height:1.7;
  color:var(--ink-soft);font-weight:400;text-align:left;letter-spacing:.01em;
  background:none;  /* 关键：屏蔽全局 .closing section 的渐变背景渗透到信件 p.closing */
  padding:0;
}
.letter-body p.closing em{color:var(--ink);font-weight:500;font-style:normal;border-bottom:none}
.letter-body p.ask{
  margin-top:32px;
  font-family:var(--serif);font-style:italic;font-size:19px;line-height:1.4;
  color:var(--accent);font-weight:500;text-align:center;letter-spacing:.05em;
}

.letter-sig{
  margin-top:22px;padding-top:18px;border-top:1px dashed rgba(14,18,24,.13);
  display:flex;justify-content:space-between;align-items:flex-end;gap:16px;
}
.letter-sig .sig-cta{
  flex:0 0 auto;  /* 不再被 flex 撑满，按内容宽度 */
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--serif);font-weight:500;font-size:15px;color:var(--ink);
  text-decoration:none;letter-spacing:.02em;line-height:1.6;
  padding:6px 0 6px 0;
  align-self:flex-end;
  width:fit-content;max-width:240px;  /* 防止下划线被拉长 */
  transition:color .25s ease, border-color .25s ease, transform .25s ease;
}
.letter-sig .sig-cta > span:first-child{
  border-bottom:1px solid var(--accent);  /* 下划线只画在文字本身底下，不画到 → 箭头 */
  padding-bottom:1px;
}
.letter-sig .sig-cta:hover{
  color:var(--accent);border-bottom-color:var(--ink);transform:translateX(2px);
}
.letter-sig .sig-cta .arrow{
  font-family:var(--latin);font-style:italic;font-size:17px;color:var(--accent);
  transition:transform .25s ease;
}
.letter-sig .sig-cta:hover .arrow{transform:translateX(3px)}
.letter-sig .sig-cta .label-en{
  display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;
  color:var(--ink-mute);text-transform:uppercase;margin-bottom:3px;font-weight:400;
}
.letter-sig .sig-left{
  flex:0 0 auto;
  display:flex;flex-direction:column;align-items:center;
  margin-left:auto;  /* 推到右侧，紧贴 sig-right "邱懿武" */
  margin-right:8px;
}
.letter-sig .sig-img{
  display:block;max-width:180px;height:auto;width:auto;
  /* signature is transparent PNG · keep natural ink */
  filter:contrast(1.05);
}
.letter-sig .sig-fallback{
  font-family:var(--hand-cn);font-size:38px;color:var(--ink);line-height:1;letter-spacing:.06em;
}
.letter-sig .sig-right{
  text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:4px;
}
.letter-sig .sig-name{
  font-family:var(--sans);font-weight:500;font-size:16px;color:var(--ink);
  letter-spacing:.08em;
}
.letter-sig .meta{
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--ink-mute);
  text-transform:uppercase;line-height:1.7;
}

/* =================================================================
   MARQUEE · 双行职称, more variety
   ================================================================= */
.marquee-wrap{background:var(--paper);padding:80px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);position:relative}
.marquee-title{
  text-align:center;font-family:var(--serif);font-weight:600;
  font-size:clamp(34px,4.6vw,72px);line-height:1.15;letter-spacing:.01em;
  color:var(--ink);margin:0 auto 22px;max-width:900px;padding:0 22px;
}
.marquee-title em{font-style:normal;color:var(--accent);font-weight:700}
.marquee-label{text-align:center;font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--ink-mute);margin-bottom:38px;text-transform:uppercase}
.marquee-label em{color:var(--accent);font-style:normal}
.marquee{
  display:flex;overflow:hidden;padding:14px 0;
  mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.marquee-track{display:flex;gap:48px;animation:scroll-x 80s linear infinite;flex-shrink:0;align-items:center}
.marquee-track.reverse{animation-direction:reverse;animation-duration:96s}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes scroll-x{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.marquee .role{
  font-family:var(--sans);font-weight:400;font-size:clamp(24px,2.6vw,38px);
  color:var(--ink);white-space:nowrap;display:flex;align-items:center;gap:48px;line-height:1;letter-spacing:.02em;
}
.marquee .role::after{content:"✦";color:var(--accent);font-size:.5em;opacity:.6}
.marquee .role em{font-style:normal;color:var(--accent);font-weight:500;letter-spacing:.04em}

/* =================================================================
   SECTION SHARED
   ================================================================= */
section.chap{position:relative;padding:160px 8vw}
section.chap.paper{background:var(--paper);color:var(--ink)}
section.chap.paper-2{background:var(--paper-2);color:var(--ink)}
section.chap.ink{background:var(--ink);color:#fff}
section.chap.night{
  background:linear-gradient(180deg,var(--night-2) 0%,var(--night-1) 100%);color:#fff;
  position:relative;overflow:hidden;
}
section.chap.night::before{
  content:"";position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1, 0 0 0 0 1, 0 0 0 0 1, 0 0 0 0.12 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode:overlay;opacity:.4;pointer-events:none;
}
section.chap.night::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(1px 1px at 8% 20%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 28% 50%, rgba(255,255,255,.4), transparent),
    radial-gradient(1px 1px at 48% 30%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 78% 60%, rgba(255,255,255,.4), transparent),
    radial-gradient(1px 1px at 92% 25%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 38% 80%, rgba(255,255,255,.4), transparent),
    radial-gradient(1px 1px at 65% 85%, rgba(255,255,255,.5), transparent);
}
.chap-head{max-width:1400px;margin:0 auto 80px;position:relative;z-index:5}
.chap-num{font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--accent);margin-bottom:24px;text-transform:uppercase;font-weight:400}
.chap-num::before{content:"";display:inline-block;width:32px;height:1px;background:currentColor;vertical-align:middle;margin-right:14px;opacity:.7}
.night .chap-num,.ink .chap-num{color:var(--gold-light)}
h2.chap-title{
  font-family:var(--sans);font-weight:500;
  font-size:clamp(38px,5.2vw,84px);line-height:1.1;letter-spacing:.01em;color:var(--ink);max-width:1100px;
}
.night h2.chap-title,.ink h2.chap-title{color:#fff}
h2.chap-title em{font-style:normal;color:var(--accent);font-weight:600}
.night h2.chap-title em,.ink h2.chap-title em{color:var(--gold-light)}
.chap-sub{font-size:16px;color:var(--ink-soft);max-width:680px;margin-top:32px;line-height:1.9;font-weight:400}
.night .chap-sub,.ink .chap-sub{color:rgba(255,255,255,.7)}

/* =================================================================
   1 · CORE PROJECT · 少年CEO
   ================================================================= */
.ceo-tag{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 18px;background:var(--accent-deep);color:#fff;
  border-radius:99px;font-family:var(--mono);font-size:11px;letter-spacing:.22em;
  margin-bottom:30px;text-transform:uppercase;font-weight:400;
}
.ceo-tag .dot{width:6px;height:6px;background:var(--gold-light);border-radius:99px;box-shadow:0 0 6px var(--gold-light)}

.ceo-mega{
  font-family:var(--sans);font-weight:600;color:var(--ink);
  font-size:clamp(80px,15vw,220px);line-height:.9;letter-spacing:-.02em;
  margin:-10px 0 28px;
}
.ceo-mega em{font-style:italic;font-family:var(--latin);font-weight:600;color:var(--accent)}

.ceo-pitch{
  font-family:var(--sans);font-weight:400;
  font-size:clamp(20px,2.2vw,30px);line-height:1.55;color:var(--ink);
  max-width:920px;margin:0 0 70px;letter-spacing:.01em;
}
.ceo-pitch .strike{color:var(--ink-mute);text-decoration:line-through;text-decoration-color:rgba(74,117,229,.4);font-weight:400}
.ceo-pitch em{font-style:normal;color:var(--accent);font-weight:600}

.ceo-split{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:start;max-width:1400px;margin:0 auto}
.four-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.four-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  padding:30px 28px;position:relative;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.four-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 12px 24px -12px rgba(74,117,229,.25)}
.four-card .idx{
  position:absolute;top:18px;right:24px;
  font-family:var(--latin);font-style:italic;font-size:38px;
  color:rgba(74,117,229,.3);line-height:1;font-weight:500;
}
.four-card h4{font-family:var(--sans);font-weight:600;font-size:20px;margin-bottom:4px;color:var(--ink);letter-spacing:.02em}
.four-card .en{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;margin-bottom:14px;font-weight:400}
.four-card p{font-size:13px;color:var(--ink-soft);line-height:1.65;margin-bottom:12px}
.four-card .q{font-family:var(--serif);font-size:13.5px;color:var(--ink);padding-top:10px;border-top:1px dashed var(--line)}

.triangle-frame{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  padding:28px;position:sticky;top:120px;
}
.triangle-frame img{width:100%;height:auto;object-fit:contain;display:block}
.triangle-cap{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--ink-mute);text-align:center;margin-top:24px;text-transform:uppercase}

/* ====== 2-COLUMN LEARNING LAYOUT · Triangle LEFT + Cards RIGHT ====== */

/* === ANIMATED TRIANGLE (restored) === */
.tri-diagram{
  position:relative;width:100%;aspect-ratio:1/1.05;max-width:440px;margin:30px auto 0;
  padding:70px 12px 24px;
}
.tri-diagram .motiv{position:absolute;top:0;left:50%;transform:translateX(-50%);text-align:center;z-index:10}
.tri-diagram .motiv-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;
  padding:6px 14px;background:rgba(74,117,229,.10);border:1px solid rgba(74,117,229,.35);border-radius:99px;
  animation:motiv-pulse 2.4s ease-in-out infinite;
}
.tri-diagram .motiv-label em{font-family:var(--latin);font-style:italic;color:var(--accent-deep);font-weight:600}
@keyframes motiv-pulse{0%,100%{box-shadow:0 0 0 0 rgba(74,117,229,0)}50%{box-shadow:0 0 0 8px rgba(74,117,229,.10)}}
.tri-diagram .motiv-arrow{
  width:1px;height:30px;margin:4px auto 0;
  background:linear-gradient(180deg,var(--accent),transparent);position:relative;
}
.tri-diagram .motiv-arrow::after{
  content:"";position:absolute;left:50%;bottom:-4px;transform:translateX(-50%);
  width:7px;height:7px;background:var(--accent);border-radius:50%;
  box-shadow:0 0 8px var(--accent);
  animation:motiv-drop 2.4s ease-in-out infinite;
}
@keyframes motiv-drop{
  0%{top:-30px;opacity:0}
  20%{opacity:1}
  100%{top:0;opacity:0}
}
.tri-diagram .tri-svg{position:absolute;inset:84px 8% 50px;width:auto;height:auto}
.tri-diagram .tri-fill{fill:url(#tri-grad);opacity:.45}
.tri-diagram .tri-edge{
  stroke:var(--accent);stroke-width:1.5;fill:none;stroke-dasharray:6 6;opacity:.4;
  animation:tri-flow 8s linear infinite;
}
.tri-diagram .tri-edge.e2{animation-delay:-2.7s}
.tri-diagram .tri-edge.e3{animation-delay:-5.4s}
@keyframes tri-flow{to{stroke-dashoffset:-120}}
.tri-diagram .flow-dot{
  fill:#4A75E5;
  filter:drop-shadow(0 0 4px rgba(74,117,229,.85)) drop-shadow(0 0 8px rgba(74,117,229,.4));
}

/* SVG vertex dots — guaranteed at triangle vertices */
.tri-diagram .vertex-dot{
  fill:#fff;stroke:var(--accent);stroke-width:2.5;cursor:pointer;
  transition:fill .25s, transform .25s, filter .25s;
  transform-origin:center;transform-box:fill-box;
  animation:vdot-cycle 4.5s ease-in-out infinite;
}
.tri-diagram .vertex-dot[data-cap="human-ai"]{animation-delay:0s}
.tri-diagram .vertex-dot[data-cap="engineering"]{animation-delay:1.5s}
.tri-diagram .vertex-dot[data-cap="creativity"]{animation-delay:3s}
@keyframes vdot-cycle{
  0%,18%,100%{fill:#fff;transform:scale(1);filter:drop-shadow(0 0 0 transparent)}
  9%{fill:#4A75E5;transform:scale(1.25);filter:drop-shadow(0 0 8px rgba(74,117,229,.6))}
}
.tri-diagram .vertex-dot.is-active,
.tri-diagram .vertex-dot:hover{
  animation:none;fill:var(--accent);transform:scale(1.4);
  filter:drop-shadow(0 0 8px rgba(74,117,229,.6));
}

/* Center 'PBL' core — 三角形几何重心位置
   viewBox 460×460，顶点 (230,80) 底两点 (70,355)、(390,355)
   重心 y = (80+355+355)/3 ≈ 263 → 在 viewBox 中 57.2%
   叠加 .tri-diagram padding-top(70px) + svg inset(84px) 后 ≈ 56% */
.tri-diagram .tri-core{
  position:absolute;top:56%;left:50%;transform:translate(-50%,-50%);z-index:8;
  width:120px;height:120px;display:grid;place-items:center;
}
.tri-diagram .core-disc{
  width:100px;height:100px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#fff,#FCEFE2 70%,#F4D9C8 100%);
  border:1px solid rgba(200,71,44,.45);
  display:grid;place-items:center;text-align:center;position:relative;z-index:3;
  box-shadow:inset 0 -3px 8px rgba(200,71,44,.08), 0 8px 24px -10px rgba(200,71,44,.35);
  animation:core-beat 2.4s ease-in-out infinite;
}
.tri-diagram .core-text{display:flex;flex-direction:column;align-items:center;line-height:1}
.tri-diagram .core-text strong{
  font-family:var(--serif);font-size:32px;color:var(--red);font-weight:900;letter-spacing:.04em;line-height:1;
}
.tri-diagram .core-text span{
  display:block;font-family:var(--mono);font-size:8.5px;font-weight:500;letter-spacing:.22em;color:rgba(200,71,44,.7);margin-top:6px;
}
@keyframes core-beat{
  0%,100%{transform:scale(1);box-shadow:inset 0 -3px 8px rgba(200,71,44,.08), 0 8px 24px -10px rgba(200,71,44,.35)}
  50%   {transform:scale(1.05);box-shadow:inset 0 -5px 12px rgba(200,71,44,.18), 0 14px 36px -8px rgba(200,71,44,.55)}
}
.tri-diagram .pulse{
  position:absolute;top:50%;left:50%;width:84px;height:84px;margin:-42px 0 0 -42px;
  border-radius:50%;border:1.5px solid rgba(200,71,44,.55);pointer-events:none;z-index:1;
  animation:tri-pulse 2.4s ease-out infinite;
}
.tri-diagram .pulse.p2{animation-delay:1.2s}
@keyframes tri-pulse{
  0%{transform:scale(.4);opacity:0}
  15%{opacity:.7}
  100%{transform:scale(2.4);opacity:0;border-color:rgba(74,117,229,0)}
}

/* Corner labels (HTML, outside vertices) */
.tri-diagram .tri-lbl{
  position:absolute;z-index:10;text-align:center;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:4px;line-height:1.2;width:170px;
}
.tri-diagram .l-top{left:50%;top:30.5%;transform:translate(-50%, calc(-100% - 24px))}
.tri-diagram .l-bl{left:22.4%;top:73%;transform:translate(-50%, 56px)}
.tri-diagram .l-br{left:77.6%;top:73%;transform:translate(-50%, 56px)}
.tri-diagram .tri-lbl strong{
  font-family:var(--sans);font-weight:600;font-size:16px;color:var(--ink);letter-spacing:.02em;transition:color .25s;
}
.tri-diagram .tri-lbl span{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase;
}
.tri-diagram .tri-lbl .tag{
  margin-top:3px;padding:3px 10px;
  font-family:var(--sans);font-size:11px;color:var(--ink-mute);
  background:var(--paper-2);border-radius:99px;transition:all .25s;
}
.tri-diagram .tri-lbl.is-active strong,
.tri-diagram .tri-lbl:hover strong{color:var(--accent)}
.tri-diagram .tri-lbl.is-active .tag,
.tri-diagram .tri-lbl:hover .tag{background:rgba(74,117,229,.12);color:var(--accent);font-weight:500}

/* === Right column · 3P + 3 capabilities (matching widths) === */
.cap-side{display:flex;flex-direction:column;gap:12px}
/* 3P row · OUTER white frame (matches cap-row card style) + 3 smaller inner pills */
.three-p-row-h{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  padding:20px 24px;  /* 与 .cap-row 同 padding，确保框宽和左右边距一致 */
  transition:border-color .25s, box-shadow .25s, transform .25s;
}
.three-p-row-h:hover{border-color:var(--red);box-shadow:0 14px 30px -16px rgba(200,71,44,.25);transform:translateY(-2px)}
.three-p-row-h .p-box{
  background:transparent;border:0;border-radius:0;
  padding:6px 8px;text-align:center;
  position:relative;
}
/* thin vertical divider between P items */
.three-p-row-h .p-box + .p-box::before{
  content:"";position:absolute;left:0;top:18%;bottom:18%;width:1px;background:var(--line-soft);
}
.three-p-row-h .p-letter{
  display:block;font-family:var(--serif);font-weight:900;font-size:22px;color:var(--red);letter-spacing:.04em;line-height:1;
}
.three-p-row-h .p-en{
  display:block;font-family:var(--mono);font-size:8.5px;letter-spacing:.2em;color:var(--ink-mute);text-transform:uppercase;margin-top:4px;
}
.three-p-row-h .p-cn{
  display:block;font-family:var(--sans);font-weight:500;font-size:12px;color:var(--ink);margin-top:4px;
}

/* 3 capability rows (same gap as 3P) */
.cap-rows{display:grid;gap:12px}
.cap-row{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  padding:20px 24px;display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;
  cursor:pointer;
  transition:transform .25s, border-color .25s, box-shadow .25s;
}
.cap-row.is-active,.cap-row:hover{
  border-color:var(--accent);transform:translateY(-3px);
  box-shadow:0 14px 30px -16px rgba(74,117,229,.3);
}
.cap-row .cap-num{
  font-family:var(--latin);font-style:italic;font-weight:500;font-size:36px;color:var(--accent);
  line-height:1;width:50px;text-align:center;flex-shrink:0;
  transition:color .25s, transform .25s;
}
.cap-row.is-active .cap-num,.cap-row:hover .cap-num{color:var(--accent-deep);transform:scale(1.08)}
.cap-row .cap-body{display:flex;flex-direction:column;gap:6px}
.cap-row .cap-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.cap-row h4{font-family:var(--sans);font-weight:600;font-size:19px;color:var(--ink);letter-spacing:.02em;line-height:1.2;margin:0}
.cap-row .cap-en{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase}
.cap-row p{font-size:13.5px;color:var(--ink-soft);line-height:1.7;margin:0}

/* === Responsive · stack on mobile === */
@media (max-width:900px){
  .learning-grid{grid-template-columns:1fr !important;gap:30px !important}
  .tri-diagram{max-width:420px}
}

/* === Bottom summary tagline === */
.learning-summary{
  max-width:1400px;margin:50px auto 0;
  display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;
  padding:18px 24px;background:linear-gradient(90deg,rgba(74,117,229,.04),rgba(232,201,124,.06),rgba(200,71,44,.04));
  border-radius:99px;
}
.learning-summary .ss-tag{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;font-weight:500}
.learning-summary .ss-arrow{color:var(--ink-mute);font-size:13px}

/* === DEPRECATED LEGACY · old horizontal flow CSS (will be cleaned up) === */
.pbl-flow-deprecated{
  max-width:1400px;margin:50px auto 0;padding:36px 40px;
  background:linear-gradient(135deg, rgba(74,117,229,.04), rgba(232,201,124,.06), rgba(200,71,44,.04));
  border:1px solid var(--line-soft);border-radius:18px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.pbl-flow .flow-motiv{display:flex;align-items:center;gap:14px}
.pbl-flow .motiv-pill{
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;
  padding:8px 18px;background:rgba(74,117,229,.10);border:1px solid rgba(74,117,229,.35);border-radius:99px;
  animation:motiv-pulse 2.4s ease-in-out infinite;white-space:nowrap;
}
.pbl-flow .motiv-pill em{font-family:var(--latin);font-style:italic;color:var(--accent-deep);font-weight:600;letter-spacing:.04em}
@keyframes motiv-pulse{0%,100%{box-shadow:0 0 0 0 rgba(74,117,229,0)}50%{box-shadow:0 0 0 8px rgba(74,117,229,.10)}}
.pbl-flow .motiv-arrow-h{
  width:50px;height:1.5px;background:linear-gradient(90deg, var(--accent), transparent);position:relative;
}
.pbl-flow .motiv-arrow-h::after{
  content:"→";position:absolute;right:-2px;top:-12px;color:var(--accent);font-size:18px;line-height:1;font-weight:600;
}

/* PBL hub · pulsing red core */
.pbl-flow .pbl-hub{position:relative;width:108px;height:108px;display:grid;place-items:center;flex-shrink:0}
.pbl-flow .hub-pulse{
  position:absolute;top:50%;left:50%;width:78px;height:78px;margin:-39px 0 0 -39px;
  border-radius:50%;border:1.5px solid rgba(200,71,44,.55);pointer-events:none;
  animation:hub-pulse-out 2.4s ease-out infinite;
}
.pbl-flow .hub-pulse.p2{animation-delay:1.2s}
@keyframes hub-pulse-out{
  0%{transform:scale(.5);opacity:0}
  15%{opacity:.7}
  100%{transform:scale(2.2);opacity:0;border-color:rgba(74,117,229,0)}
}
.pbl-flow .hub-disc{
  width:88px;height:88px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%, #fff, #FCEFE2 70%, #F4D9C8 100%);
  border:1px solid rgba(200,71,44,.45);
  display:grid;place-items:center;text-align:center;position:relative;z-index:3;
  box-shadow:inset 0 -3px 8px rgba(200,71,44,.08), 0 8px 24px -10px rgba(200,71,44,.35);
  animation:core-beat 2.4s ease-in-out infinite;
}
.pbl-flow .hub-disc strong{
  display:block;font-family:var(--serif);font-size:24px;color:var(--red);font-weight:900;letter-spacing:.04em;line-height:1;
}
.pbl-flow .hub-disc span{
  display:block;font-family:var(--mono);font-size:8px;letter-spacing:.22em;color:rgba(200,71,44,.7);margin-top:5px;
}
@keyframes core-beat{
  0%,100%{transform:scale(1)}
  50%   {transform:scale(1.05)}
}

/* equals sign between PBL and 3P */
.pbl-flow .flow-eq{
  font-family:var(--serif);font-size:36px;color:var(--ink-mute);font-weight:300;flex-shrink:0;
}

/* 3 P boxes inline */
.three-p-inline{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.three-p-inline .p-box{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  padding:16px 18px;text-align:center;min-width:110px;
  transition:transform .25s, border-color .25s, box-shadow .25s;
}
.three-p-inline .p-box:hover{
  transform:translateY(-3px);border-color:var(--red);box-shadow:0 10px 22px -10px rgba(200,71,44,.3);
}
.three-p-inline .p-letter{
  display:block;font-family:var(--serif);font-weight:900;font-size:30px;color:var(--red);letter-spacing:.04em;line-height:1;
}
.three-p-inline .p-en{
  display:block;font-family:var(--mono);font-size:9px;letter-spacing:.22em;color:var(--ink-mute);text-transform:uppercase;margin-top:4px;
}
.three-p-inline .p-cn{
  display:block;font-family:var(--sans);font-weight:500;font-size:13px;color:var(--ink);margin-top:6px;
}
.three-p-inline .p-plus{
  font-family:var(--serif);font-size:22px;color:var(--ink-mute);font-weight:300;
}

@media (max-width:900px){
  .pbl-flow{padding:28px 22px;gap:18px;justify-content:center}
  .pbl-flow .flow-eq{display:none}
  .three-p-inline{justify-content:center}
}

/* Row 2 · "↓ 同步锻炼 ↓" arrow */
.flow-down-arrow{
  max-width:1400px;margin:24px auto 0;text-align:center;
  font-family:var(--mono);font-size:11px;letter-spacing:.32em;color:var(--accent);text-transform:uppercase;font-weight:500;
}

/* Row 3-5 · 3 capability cards full-width stacked */
.cap-rows{max-width:1400px;margin:20px auto 0;display:grid;gap:14px}
.cap-row{
  background:#fff;border:1px solid var(--line-soft);border-radius:14px;
  padding:28px 32px;display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;
  cursor:pointer;
  transition:transform .25s, border-color .25s, box-shadow .25s, background .25s;
}
.cap-row.is-active,.cap-row:hover{
  border-color:var(--accent);transform:translateY(-3px);
  box-shadow:0 14px 30px -16px rgba(74,117,229,.3);
}
.cap-row .cap-num{
  font-family:var(--latin);font-style:italic;font-weight:500;font-size:48px;color:var(--accent);
  line-height:1;width:60px;text-align:center;flex-shrink:0;
  transition:color .25s, transform .25s;
}
.cap-row.is-active .cap-num,.cap-row:hover .cap-num{color:var(--accent-deep);transform:scale(1.08)}
.cap-row .cap-body{display:flex;flex-direction:column;gap:6px}
.cap-row .cap-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.cap-row h4{font-family:var(--sans);font-weight:600;font-size:22px;color:var(--ink);letter-spacing:.02em;line-height:1.2;margin:0}
.cap-row .cap-en{font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase}
.cap-row .cap-tag{
  padding:3px 10px;background:var(--paper-2);border-radius:99px;
  font-family:var(--sans);font-size:11.5px;color:var(--ink-mute);
  transition:all .25s;
}
.cap-row.is-active .cap-tag,.cap-row:hover .cap-tag{background:rgba(74,117,229,.10);color:var(--accent);font-weight:500}
.cap-row p{font-size:14px;color:var(--ink-soft);line-height:1.75;margin:0}

@media (max-width:760px){
  .cap-row{padding:22px 20px;grid-template-columns:auto 1fr;gap:18px}
  .cap-row .cap-num{font-size:36px;width:44px}
  .cap-row h4{font-size:18px}
  .cap-row .cap-head{gap:8px}
}

/* Bottom summary tagline */
.learning-summary{
  max-width:1400px;margin:30px auto 0;
  display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;
  padding:18px 24px;background:linear-gradient(90deg, rgba(74,117,229,.04), rgba(232,201,124,.06), rgba(200,71,44,.04));
  border-radius:99px;
}
.learning-summary .ss-tag{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;font-weight:500}
.learning-summary .ss-arrow{color:var(--ink-mute);font-size:13px}

/* === Legacy triangle CSS (kept for safety - won't render since HTML removed) === */
.tri-diagram-legacy{display:none}
/* 激发动机 trigger on top */
.tri-diagram .motiv{position:absolute;top:0;left:50%;transform:translateX(-50%);text-align:center;z-index:10}
.tri-diagram .motiv-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;
  padding:6px 14px;background:rgba(74,117,229,.10);border:1px solid rgba(74,117,229,.35);border-radius:99px;
  animation:motiv-pulse 2.4s ease-in-out infinite;
}
.tri-diagram .motiv-label em{font-family:var(--latin);font-style:italic;color:var(--accent-deep);font-weight:600}
@keyframes motiv-pulse{0%,100%{box-shadow:0 0 0 0 rgba(74,117,229,0)}50%{box-shadow:0 0 0 8px rgba(74,117,229,.10)}}
.tri-diagram .motiv-arrow{
  width:1px;height:30px;margin:4px auto 0;
  background:linear-gradient(180deg,var(--accent),transparent);position:relative;
}
.tri-diagram .motiv-arrow::after{
  content:"";position:absolute;left:50%;bottom:-4px;transform:translateX(-50%);
  width:7px;height:7px;background:var(--accent);border-radius:50%;
  box-shadow:0 0 8px var(--accent);
  animation:motiv-drop 2.4s ease-in-out infinite;
}
@keyframes motiv-drop{
  0%{top:-30px;opacity:0}
  20%{opacity:1}
  100%{top:0;opacity:0}
}

/* SVG triangle layer */
.tri-diagram .tri-svg{
  position:absolute;inset:84px 8% 50px;width:auto;height:auto;
}
.tri-diagram .tri-fill{
  fill:url(#tri-grad);opacity:.45;
}
.tri-diagram .tri-edge{
  stroke:var(--accent);stroke-width:1.5;fill:none;
  stroke-dasharray:6 6;opacity:.4;
  animation:tri-flow 8s linear infinite;
}
.tri-diagram .tri-edge.e2{animation-delay:-2.7s}
.tri-diagram .tri-edge.e3{animation-delay:-5.4s}
@keyframes tri-flow{to{stroke-dashoffset:-120}}
.tri-diagram .flow-dot{
  fill:url(#dot-grad);
  filter:drop-shadow(0 0 4px rgba(74,117,229,.85)) drop-shadow(0 0 8px rgba(74,117,229,.4));
}

/* Center · PBL big text, perceptual-center of triangle
   ⚠ 这是 line 668 的重复 CSS（之前留下的副本）。
   top 必须跟上面一致（56%），否则后定义会覆盖前者。 */
.tri-diagram .tri-core{
  position:absolute;top:56%;left:50%;transform:translate(-50%,-50%);z-index:8;
  width:120px;height:120px;display:grid;place-items:center;
}
.tri-diagram .core-disc{
  width:100px;height:100px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#fff,#FCEFE2 70%, #F4D9C8 100%);
  border:1px solid rgba(200,71,44,.45);
  display:grid;place-items:center;text-align:center;position:relative;z-index:3;
  box-shadow:inset 0 -3px 8px rgba(200,71,44,.08), 0 8px 24px -10px rgba(200,71,44,.35);
  animation:core-beat 2.4s ease-in-out infinite;
}
.tri-diagram .core-text{display:flex;flex-direction:column;align-items:center;line-height:1}
.tri-diagram .core-text strong{
  font-family:var(--serif);font-size:32px;color:var(--red);font-weight:900;letter-spacing:.04em;line-height:1;
}
.tri-diagram .core-text span{
  display:block;font-family:var(--mono);font-size:8.5px;font-weight:500;letter-spacing:.22em;color:rgba(200,71,44,.7);margin-top:6px;line-height:1.2;
}
@keyframes core-beat{
  0%,100%{transform:scale(1);box-shadow:inset 0 -3px 8px rgba(200,71,44,.08), 0 8px 24px -10px rgba(200,71,44,.35)}
  50%   {transform:scale(1.05);box-shadow:inset 0 -5px 12px rgba(200,71,44,.18), 0 14px 36px -8px rgba(200,71,44,.55)}
}
.tri-diagram .pulse{
  position:absolute;top:50%;left:50%;width:84px;height:84px;margin:-42px 0 0 -42px;
  border-radius:50%;border:1.5px solid rgba(200,71,44,.55);
  pointer-events:none;z-index:1;
  animation:tri-pulse 2.4s ease-out infinite;
}
.tri-diagram .pulse.p2{animation-delay:1.2s}
@keyframes tri-pulse{
  0%{transform:scale(.4);opacity:0}
  15%{opacity:.7}
  100%{transform:scale(2.4);opacity:0;border-color:rgba(74,117,229,0)}
}

/* ===== DUPLICATE LEGACY BLOCK REMOVED ===== */
/* (Old tri-dot / tri-lbl CSS was overriding the newer values at line ~671. Deleted.) */

/* === Three-P explainer strip · below the triangle === */
.three-p-strip{
  max-width:520px;margin:30px auto 0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
}
.three-p-strip .p-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:10px;
  padding:16px 12px 14px;text-align:center;
  transition:border-color .25s, transform .25s, box-shadow .25s;
  cursor:default;
}
.three-p-strip .p-card:hover{
  border-color:var(--red);transform:translateY(-2px);
  box-shadow:0 8px 18px -10px rgba(200,71,44,.3);
}
.three-p-strip .p-card .p-big{
  font-family:var(--serif);font-weight:900;font-size:30px;color:var(--red);letter-spacing:.04em;line-height:1;display:block;
}
.three-p-strip .p-card .p-name{
  display:block;margin-top:4px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--ink-mute);text-transform:uppercase;
}
.three-p-strip .p-card .p-cn{
  display:block;margin-top:8px;
  font-family:var(--sans);font-weight:500;font-size:13px;color:var(--ink);
}
.three-p-strip-title{
  text-align:center;font-family:var(--mono);font-size:11px;letter-spacing:.28em;color:var(--ink-mute);text-transform:uppercase;margin-top:20px;
}
.three-p-strip-title strong{color:var(--red);font-weight:500}
/* Right-side card sync — clean hover (no blue bar) */
.cap-card{
  cursor:pointer;transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.cap-card.is-active,.cap-card:hover{
  border-color:var(--accent) !important;
  transform:translateY(-3px);
  box-shadow:0 14px 30px -16px rgba(74,117,229,.3);
  background:#fff !important;
}
.cap-card.is-active .cap-num,.cap-card:hover .cap-num{color:var(--accent-deep) !important;transform:scale(1.1);transition:transform .25s, color .25s}
@media (max-width:900px){
  .tri-diagram{max-width:440px;aspect-ratio:1/1.1;padding:74px 8px 28px}
  .tri-diagram .tri-svg{inset:74px 6% 50px}
  .tri-diagram .tri-core{width:96px;height:96px;top:56%}
  .tri-diagram .core-disc{width:84px;height:84px}
  .tri-diagram .core-text{font-size:12.5px}
}
@media (max-width:560px){
  .tri-diagram .tri-node .tag{display:none}
  .tri-diagram .tri-node .lbl strong{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  .tri-diagram .core-disc,.tri-diagram .pulse,.tri-diagram .tri-node .dot,
  .tri-diagram .tri-edge,.tri-diagram .motiv-label,.tri-diagram .motiv-arrow::after,
  .tri-diagram .flow-dot animateMotion{animation:none}
}

/* =================================================================
   2 · 三段叙事浓缩 (glass cards on night)
   ────────────────────────────────────────────────────
   新构图（第一一〇轮）：3 张横长卡片纵向叠（呼应 .cap-rows 节奏）
   每张卡内部 2 栏：左 pin/h3/sub-line/more + 右 center-formula/blockquote
   ================================================================= */
.three-col{
  display:grid;grid-template-columns:1fr;
  gap:18px;max-width:1180px;margin:0 auto;position:relative;z-index:5;
}
.glass-col{
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(40px) saturate(180%);
  -webkit-backdrop-filter:blur(40px) saturate(180%);
  border:1px solid rgba(255,255,255,.14);
  border-radius:16px;padding:40px 44px;
  /* 桌面：左右双栏 */
  display:grid;grid-template-columns:1.05fr 1fr;
  grid-template-rows:auto auto auto 1fr auto;
  column-gap:48px;row-gap:14px;align-items:start;
  transition:transform .3s ease,border-color .3s ease,background .3s ease;
  box-shadow:0 10px 60px -15px rgba(0,0,0,.3), inset 0 1px 0 rgba(255,255,255,.2);
}
/* 左栏：pin (r1) / h3 (r2) / sub-line (r3) / more (r5) */
.glass-col > .pin{grid-column:1;grid-row:1}
.glass-col > h3{grid-column:1;grid-row:2}
.glass-col > .sub-line{grid-column:1;grid-row:3}
.glass-col > .more{grid-column:1;grid-row:5;align-self:end;justify-self:start}
/* 右栏：center-formula (r1-3) / blockquote (r4-5) */
.glass-col > .center-formula{grid-column:2;grid-row:1 / span 3;align-self:center;margin:0}
.glass-col > blockquote{grid-column:2;grid-row:4 / span 2;display:flex;flex-direction:column}

@media (max-width:900px){
  .glass-col{
    grid-template-columns:1fr;grid-template-rows:auto;
    column-gap:0;row-gap:18px;padding:32px 28px;
  }
  .glass-col > .pin,
  .glass-col > h3,
  .glass-col > .sub-line,
  .glass-col > .center-formula,
  .glass-col > blockquote,
  .glass-col > .more{
    grid-column:1;grid-row:auto;align-self:auto;
  }
}
.glass-col:hover{transform:translateY(-6px);border-color:var(--gold-light);background:rgba(255,255,255,.09)}
.glass-col .pin{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--gold-light);text-transform:uppercase;font-weight:400}
.glass-col h3{font-family:var(--sans);font-weight:500;font-size:28px;line-height:1.25;color:#fff;letter-spacing:.02em}
.glass-col h3 em{font-style:normal;color:var(--gold-light);font-weight:600}
.glass-col .formula{
  padding:20px 22px;background:rgba(255,255,255,.06);border-radius:10px;
  font-family:var(--sans);font-size:16.5px;color:#fff;line-height:1.6;text-align:center;
  border:1px solid rgba(255,255,255,.1);font-weight:400;
}
.glass-col .formula em{font-style:normal;color:var(--gold-light);font-weight:600}
.glass-col .formula.big{font-family:var(--sans);font-size:30px;font-weight:300;letter-spacing:.04em}

/* small subtle subtitle right under the H3 title (replaces big viewpoint-line bar) */
.glass-col .sub-line{
  font-family:var(--serif);font-size:13px;line-height:1.75;
  color:rgba(255,255,255,.55);letter-spacing:.01em;
  margin-top:-12px;margin-bottom:4px;
}
.glass-col .sub-line em{font-style:normal;color:rgba(232,201,124,.8);font-weight:500}

/* CENTRAL formula / key concept — the visual focus of each card */
.glass-col .center-formula{
  margin:14px 0 12px;padding:32px 22px;
  background:linear-gradient(135deg, rgba(232,201,124,.10), rgba(74,117,229,.06));
  border:1px solid rgba(232,201,124,.22);
  border-radius:14px;
  text-align:center;
  display:flex;flex-direction:column;gap:10px;align-items:center;
}
.glass-col .center-formula .main{
  font-family:var(--sans);font-size:22px;font-weight:500;
  color:#fff;letter-spacing:.04em;line-height:1.45;
}
.glass-col .center-formula .main em{font-style:normal;color:var(--gold-light);font-weight:700}
.glass-col .center-formula .main.eq{font-size:32px;font-weight:300;letter-spacing:.06em}
.glass-col .center-formula .zh{
  font-family:var(--sans);font-size:12.5px;color:rgba(255,255,255,.72);font-weight:400;line-height:1.6;letter-spacing:.02em;
}
.glass-col .center-formula .caption{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;
  color:rgba(232,201,124,.55);text-transform:uppercase;
  margin-top:2px;
}
.glass-col blockquote{
  padding-left:18px;border-left:2px solid var(--gold-light);
  font-family:var(--serif);font-size:15px;color:rgba(255,255,255,.82);line-height:1.7;font-weight:400;
  /* flex column so cite always pins to bottom regardless of quote length */
  display:flex;flex-direction:column;min-height:100%;
}
.glass-col cite{display:block;margin-top:auto;padding-top:12px;font-family:var(--sans);font-size:12px;letter-spacing:.04em;color:rgba(255,255,255,.72);font-style:normal;line-height:1.55;font-weight:500}
.glass-col cite .en{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:rgba(255,255,255,.45);text-transform:uppercase;font-weight:400;margin-top:3px}
.glass-col .more{margin-top:auto;font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--gold-light);padding-top:18px;border-top:1px solid rgba(255,255,255,.12);text-transform:uppercase;display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.glass-col .more:hover{color:#fff}

/* =================================================================
   3 · 培养 + 场域 合并
   ================================================================= */
.cultivate-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:1400px;margin:0 auto}
.cultivate-panel{
  background:#fff;border:1px solid var(--line-soft);border-radius:16px;padding:48px 42px;
}
.cultivate-panel .panel-tag{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--accent);margin-bottom:14px;text-transform:uppercase;font-weight:400}
.cultivate-panel h3{font-family:var(--sans);font-weight:500;font-size:34px;color:var(--ink);margin-bottom:30px;line-height:1.15;letter-spacing:.02em}
.cultivate-panel h3 em{font-style:normal;color:var(--accent);font-weight:600}

/* H³-TII diagram · 4-tier nested rings + Jupi-style heartbeat */
.h3-diagram{
  position:relative;width:100%;aspect-ratio:1/1;max-width:460px;margin:14px auto 0;
}
/* L1 ring — outer dashed (Learning Path) */
.h3-diagram .ring-l1{
  position:absolute;inset:0;border:1.5px dashed rgba(74,117,229,.32);border-radius:50%;
}
.h3-diagram .ring-l1::after{
  content:"";position:absolute;inset:-2px;border-radius:50%;
  background:conic-gradient(from -90deg, rgba(74,117,229,.22) 0deg, rgba(74,117,229,.04) 90deg, transparent 180deg, transparent 360deg);
  animation:flow-rotate 8s linear infinite;mix-blend-mode:multiply;
}
@keyframes flow-rotate{to{transform:rotate(360deg)}}
/* L2 ring — middle dashed (Action Abilities) */
.h3-diagram .ring-l2{
  position:absolute;inset:17%;border:1.5px dashed rgba(143,170,213,.42);border-radius:50%;
  background:radial-gradient(circle, transparent 55%, rgba(143,170,213,.10) 100%);
}
/* L3 ring — red disc (Meta Abilities) */
.h3-diagram .ring-l3{
  position:absolute;inset:33%;border-radius:50%;
  background:radial-gradient(circle at center, rgba(232,153,112,.36) 0%, rgba(232,153,112,.16) 100%);
  border:1px solid rgba(200,71,44,.32);
}
/* L4 core — Human Core (天赋×热情×价值感) */
.h3-diagram .core{
  position:absolute;inset:43%;border-radius:50%;z-index:9;
  background:radial-gradient(circle at 30% 30%, #fff 0%, #FCEFE2 100%);
  border:1px solid rgba(200,71,44,.5);
  display:grid;place-items:center;
  box-shadow:inset 0 -4px 12px rgba(200,71,44,.10), 0 6px 22px -8px rgba(200,71,44,.35);
  animation:core-beat 2.4s ease-in-out infinite;
}
.h3-diagram .core-text{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  font-family:var(--serif);font-size:10.5px;color:var(--red);font-weight:600;letter-spacing:.06em;
  line-height:1.15;text-align:center;padding:0 4px;
}
.h3-diagram .core-text .x{
  font-size:7px;color:rgba(200,71,44,.55);font-weight:400;line-height:1;margin:1px 0;
}
@keyframes core-beat{
  0%,100%{box-shadow:inset 0 -4px 12px rgba(200,71,44,.10), 0 6px 22px -8px rgba(200,71,44,.35);transform:scale(1)}
  50%   {box-shadow:inset 0 -6px 18px rgba(200,71,44,.20), 0 10px 32px -4px rgba(200,71,44,.55);transform:scale(1.05)}
}
/* Heartbeat pulse waves radiating from center */
.h3-diagram .pulse{
  position:absolute;top:50%;left:50%;width:84px;height:84px;
  margin:-42px 0 0 -42px;border-radius:50%;
  border:1.5px solid rgba(200,71,44,.55);
  pointer-events:none;z-index:8;
  animation:pulse-out 2.4s ease-out infinite;
}
.h3-diagram .pulse.p2{animation-delay:.8s}
.h3-diagram .pulse.p3{animation-delay:1.6s}
@keyframes pulse-out{
  0%  {transform:scale(.4);opacity:0;border-color:rgba(200,71,44,.65)}
  15% {opacity:.85}
  60% {border-color:rgba(143,170,213,.35)}
  100%{transform:scale(3.0);opacity:0;border-color:rgba(74,117,229,.0)}
}
/* L3 meta labels — sit on the red disc */
.h3-diagram .meta-lbl{
  position:absolute;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid rgba(200,71,44,.4);
  display:grid;place-items:center;font-family:var(--sans);font-weight:500;font-size:10.5px;color:var(--red);
  z-index:11;letter-spacing:.02em;
  box-shadow:0 3px 10px -3px rgba(200,71,44,.25);
}
/* L3 三个红圈位置 = 红色大圈圆周上 (容器宽 100%、L3 inset 33% → 大圈半径 17%、圆心 50%/50%)
   m-top: 12 点 → (50%, 50%-17%) = (50%, 33%)
   m-bl:  8 点 (角度 240°) → (50% - 17%cos30°, 50% + 17%sin30°) = (35.3%, 58.5%)
   m-br:  4 点 (角度 300°) → (50% + 17%cos30°, 50% + 17%sin30°) = (64.7%, 58.5%) */
.h3-diagram .m-top{top:33%;  left:50%;   transform:translate(-50%,-50%)}
.h3-diagram .m-bl {top:58.5%;left:35.3%; transform:translate(-50%,-50%)}
.h3-diagram .m-br {top:58.5%;left:64.7%; transform:translate(-50%,-50%)}
/* L1 + L2 nodes — alternating around the perimeter */
.h3-diagram .node{
  position:absolute;width:62px;height:62px;border-radius:50%;
  background:#fff;border:1.5px solid rgba(74,117,229,.32);
  display:grid;place-items:center;text-align:center;
  font-family:var(--sans);font-weight:500;font-size:12.5px;color:var(--ink);line-height:1.15;letter-spacing:.02em;
  box-shadow:0 4px 12px -4px rgba(14,18,24,.12);z-index:12;
  animation:node-cycle 4.8s ease-in-out infinite;
}
.h3-diagram .node.l1{color:var(--accent);border-color:rgba(74,117,229,.45)}
.h3-diagram .node.l2{color:var(--ink);border-color:rgba(143,170,213,.5)}
@keyframes node-cycle{
  0%, 18%, 100%{
    transform:translate(-50%,-50%) scale(1);
    box-shadow:0 4px 12px -4px rgba(14,18,24,.12), 0 0 0 0 rgba(74,117,229,0);
  }
  8%{
    transform:translate(-50%,-50%) scale(1.20);
    box-shadow:0 12px 28px -6px rgba(74,117,229,.45), 0 0 0 8px rgba(74,117,229,.10);
  }
}
/* L1 (outer ring) — 12, 4, 8 o'clock · delays 0 / 1.6 / 3.2s */
.h3-diagram .n-12{top:0%;    left:50%;   animation-delay:0s}        /* 教学 */
.h3-diagram .n-4 {top:75%;   left:93.3%; animation-delay:1.6s}      /* 创新 */
.h3-diagram .n-8 {top:75%;   left:6.7%;  animation-delay:3.2s}      /* 探究 */
/* L2 (middle ring r≈33%) — 2, 6, 10 o'clock · delays .8 / 2.4 / 4.0s */
.h3-diagram .n-2 {top:33.5%; left:78.6%; animation-delay:.8s}       /* 思维 */
.h3-diagram .n-6 {top:83%;   left:50%;   animation-delay:2.4s}      /* 实现 */
.h3-diagram .n-10{top:33.5%; left:21.4%; animation-delay:4.0s}      /* 整合 */
/* Orbit particles — particles flowing along the L1 and L2 rings */
.h3-diagram .orbit{
  position:absolute;border-radius:50%;pointer-events:none;z-index:6;
}
.h3-diagram .orbit-l1{inset:0;animation:orbit-cw 28s linear infinite}
.h3-diagram .orbit-l2{inset:17%;animation:orbit-ccw 22s linear infinite}
@keyframes orbit-cw{to{transform:rotate(360deg)}}
@keyframes orbit-ccw{to{transform:rotate(-360deg)}}
.h3-diagram .orbit .arm{
  position:absolute;inset:0;
  transform:rotate(var(--a));pointer-events:none;
}
.h3-diagram .orbit .arm::before{
  content:"";position:absolute;left:50%;top:-3px;
  width:6px;height:6px;margin-left:-3px;border-radius:50%;
  background:var(--gold-light);
  box-shadow:0 0 8px 2px rgba(232,201,124,.55);
  opacity:var(--o, .55);
  animation:dot-twinkle 2.4s ease-in-out infinite;
  animation-delay:var(--d, 0s);
}
.h3-diagram .orbit-l2 .arm::before{
  width:4px;height:4px;margin-left:-2px;top:-2px;
  background:rgba(143,170,213,1);
  box-shadow:0 0 6px 1.5px rgba(143,170,213,.5);
}
@keyframes dot-twinkle{
  0%,100%{opacity:calc(var(--o,.55) * .4);transform:scale(.8)}
  50%   {opacity:var(--o,.55);transform:scale(1.15)}
}
/* one bright "comet" particle on each ring · faster orbit */
.h3-diagram .comet{position:absolute;inset:0;pointer-events:none;z-index:7}
.h3-diagram .comet.c1{animation:orbit-cw 8s linear infinite}
.h3-diagram .comet.c2{inset:17%;animation:orbit-ccw 6s linear infinite}
.h3-diagram .comet::before{
  content:"";position:absolute;left:50%;top:-4px;
  width:8px;height:8px;margin-left:-4px;border-radius:50%;
  background:radial-gradient(circle, #fff 0%, var(--gold-light) 40%, transparent 80%);
  box-shadow:0 0 14px 3px rgba(232,201,124,.85), 0 0 28px 6px rgba(232,201,124,.35);
}
.h3-diagram .comet.c2::before{
  width:6px;height:6px;margin-left:-3px;top:-3px;
  background:radial-gradient(circle, #fff 0%, #B4CFEF 50%, transparent 80%);
  box-shadow:0 0 10px 2px rgba(180,207,239,.75);
}
/* prefers-reduced-motion */
@media (prefers-reduced-motion:reduce){
  .h3-diagram .core,.h3-diagram .pulse,.h3-diagram .node,
  .h3-diagram .ring-l1::after,.h3-diagram .orbit,.h3-diagram .comet,
  .h3-diagram .orbit .arm::before{animation:none}
  .h3-diagram .pulse{opacity:.35}
}
/* legend underneath the diagram */
.h3-legend{margin-top:30px;display:grid;gap:6px;font-family:var(--mono);font-size:11px;color:var(--ink-soft);letter-spacing:.04em}
.h3-legend .leg-row{display:flex;align-items:baseline;gap:10px;line-height:1.5}
.h3-legend .leg-key{font-weight:600;letter-spacing:.06em;font-family:var(--sans);font-size:12px}

.six-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.six-mini .cell{
  position:relative;
  padding:30px 14px;background:var(--paper-2);border-radius:10px;text-align:center;
  border:1px solid transparent;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  animation:cell-cycle 7.2s ease-in-out infinite;
  transition:transform .25s;
}
.six-mini .cell:nth-child(1){animation-delay:0s}
.six-mini .cell:nth-child(2){animation-delay:1.2s}
.six-mini .cell:nth-child(3){animation-delay:2.4s}
.six-mini .cell:nth-child(4){animation-delay:3.6s}
.six-mini .cell:nth-child(5){animation-delay:4.8s}
.six-mini .cell:nth-child(6){animation-delay:6.0s}
@keyframes cell-cycle{
  0%, 16.66%, 100%{
    background:var(--paper-2);border-color:transparent;
    box-shadow:0 0 0 0 rgba(74,117,229,0);
  }
  8.33%{
    background:#fff;border-color:rgba(74,117,229,.5);
    box-shadow:0 10px 24px -8px rgba(74,117,229,.32), 0 0 0 6px rgba(74,117,229,.08);
  }
}
.six-mini .cell:hover{background:#fff;border-color:var(--accent);transform:translateY(-2px);animation-play-state:paused}
.six-mini h5{font-family:var(--sans);font-weight:500;font-size:15px;color:var(--ink);margin-bottom:4px;letter-spacing:.04em;transition:color .3s}
.six-mini small{font-family:var(--mono);font-size:9px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase}
.six-icons .cell .ico{
  width:28px;height:28px;color:var(--accent);margin-bottom:10px;
  animation:ico-pulse 7.2s ease-in-out infinite;
}
.six-icons .cell:nth-child(1) .ico{animation-delay:0s}
.six-icons .cell:nth-child(2) .ico{animation-delay:1.2s}
.six-icons .cell:nth-child(3) .ico{animation-delay:2.4s}
.six-icons .cell:nth-child(4) .ico{animation-delay:3.6s}
.six-icons .cell:nth-child(5) .ico{animation-delay:4.8s}
.six-icons .cell:nth-child(6) .ico{animation-delay:6.0s}
@keyframes ico-pulse{
  0%, 16.66%, 100%{transform:scale(1);color:var(--accent)}
  8.33%{transform:scale(1.18) rotate(-3deg);color:var(--accent-deep)}
}
.six-icons .cell:hover .ico{transform:scale(1.1);color:var(--accent-deep);animation-play-state:paused}

/* === active state for clicked cell (six-mini click → explainer) === */
.six-mini .cell{cursor:pointer;position:relative}
.six-mini .cell.is-active{
  background:#fff;border-color:var(--accent);
  box-shadow:0 14px 30px -14px rgba(74,117,229,.4), 0 0 0 1.5px var(--accent);
  animation-play-state:paused;
}
.six-mini .cell.is-active .ico{color:var(--accent-deep);transform:scale(1.08);animation-play-state:paused}

/* === 六大制度解释面板（点击切换） === */
.six-explainer{
  margin-top:24px;position:relative;
  background:linear-gradient(135deg,rgba(74,117,229,.05),rgba(143,170,213,.07));
  border:1px solid rgba(74,117,229,.18);border-radius:12px;
  padding:24px 28px 18px;
  min-height:280px;  /* 撑高容器 — 6 个面板全 absolute，不依赖任一面板顶起高度 */
}
/* === 面板切换：纯 opacity cross-fade，无 transform、无 visibility、无 position 切换。
   只用 opacity 一个属性过渡 → GPU 合成层、无重排、无闪烁 === */
.six-explainer .exp-panel{
  position:absolute;
  top:24px;left:28px;right:28px;
  bottom:70px;  /* 给底部 .exp-nav 留出空间，避免 absolute panel 覆盖进度条 */
  opacity:0;pointer-events:none;
  transition:opacity .25s ease;
}
.six-explainer .exp-panel.is-active{
  opacity:1;pointer-events:auto;
}
/* nav 在 panels 之下显示，要明确放在最底部并保持自然 flow */
.six-explainer .exp-nav{
  position:absolute;left:28px;right:28px;bottom:18px;
  margin-top:0;  /* override 原 18px，避免在 absolute 时叠加 */
}
.six-explainer .exp-num{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;color:var(--accent);
  text-transform:uppercase;margin-bottom:10px;font-weight:500;
}
.six-explainer h6{
  font-family:var(--serif);font-weight:700;font-size:18px;color:var(--ink);
  margin:0 0 10px;letter-spacing:.005em;line-height:1.4;
}
.six-explainer p{
  font-size:13.5px;color:var(--ink-soft);line-height:1.85;margin:0 0 10px;
}
.six-explainer p:last-of-type{margin-bottom:0}
.six-explainer p em{font-style:normal;color:var(--accent);font-weight:600}
.six-explainer p.exp-q{
  margin-top:14px;padding-top:12px;
  border-top:1px dashed rgba(14,18,24,.10);
  font-family:var(--serif);font-size:13px;color:var(--ink-mute);font-style:italic;letter-spacing:.01em;
}
.six-explainer p.exp-q em{
  color:var(--ink);font-weight:600;font-family:var(--serif);font-style:italic;
}
.six-explainer .exp-nav{
  display:flex;align-items:center;gap:14px;margin-top:18px;padding-top:14px;
  border-top:1px dashed rgba(14,18,24,.10);
}
.six-explainer .exp-nav-btn{
  width:28px;height:28px;border-radius:50%;border:1px solid rgba(74,117,229,.3);
  background:rgba(255,255,255,.7);color:var(--accent);font-family:var(--latin);font-size:18px;
  cursor:pointer;transition:all .25s;line-height:1;padding:0;
}
.six-explainer .exp-nav-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.six-explainer .exp-progress{
  flex:1;height:2px;background:rgba(74,117,229,.12);border-radius:99px;overflow:hidden;
}
.six-explainer .exp-bar{
  display:block;height:100%;background:var(--accent);border-radius:99px;
  width:16.67%;transition:width .35s ease, transform .35s ease;
}

/* energy flow strip below the 6 cells — fills the right panel's empty space */
.six-flow{
  margin-top:26px;position:relative;
  background:linear-gradient(135deg,rgba(74,117,229,.04),rgba(143,170,213,.06));
  border:1px solid var(--line-soft);border-radius:10px;
  padding:20px 24px;overflow:hidden;
}
.six-flow .grid-bg{
  position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:
    linear-gradient(rgba(74,117,229,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,117,229,.08) 1px, transparent 1px);
  background-size:20px 20px;
}
.six-flow .flow-line{
  position:relative;height:2px;margin:8px 4px 16px;
  background:linear-gradient(90deg, transparent, rgba(74,117,229,.25) 15%, rgba(74,117,229,.25) 85%, transparent);
}
.six-flow .flow-line::before{
  content:"";position:absolute;top:50%;left:0;
  width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;
  background:radial-gradient(circle, #fff 0%, var(--accent) 50%, transparent 80%);
  box-shadow:0 0 12px 3px rgba(74,117,229,.6), 0 0 24px 6px rgba(74,117,229,.25);
  animation:flow-particle 7.2s ease-in-out infinite;
}
@keyframes flow-particle{
  0%  {left:8%}
  16% {left:25%}
  33% {left:50%}
  50% {left:75%}
  66% {left:92%}
  83% {left:50%}
  100%{left:8%}
}
.six-flow .flow-dots{
  position:absolute;top:8px;left:24px;right:24px;height:2px;display:flex;justify-content:space-between;
}
.six-flow .flow-dots span{
  width:6px;height:6px;border-radius:50%;background:rgba(74,117,229,.3);margin-top:13px;
}
.six-flow .sig{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--ink-mute);text-transform:uppercase;
}
.six-flow .sig strong{font-family:var(--sans);color:var(--accent);font-weight:600;letter-spacing:.06em;text-transform:none;font-size:12px}
.six-flow .sig .stamp{
  padding:4px 10px;border:1px solid rgba(200,71,44,.35);border-radius:99px;
  font-size:9.5px;color:var(--red);letter-spacing:.16em;
}

.spirits-strip{margin-top:36px;display:grid;grid-template-columns:repeat(5,1fr);gap:12px;max-width:1400px;margin-left:auto;margin-right:auto}
.spirit-pill{
  background:#fff;border:1px solid var(--line-soft);border-radius:99px;
  padding:18px 14px;text-align:center;display:flex;align-items:center;justify-content:center;gap:14px;
  transition:all .25s ease;
}
.spirit-pill:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.spirit-pill:hover .ch,.spirit-pill:hover h4{color:#fff}
.spirit-pill .ch{font-family:var(--serif);font-weight:500;font-size:28px;color:var(--accent);line-height:1;transition:color .25s}
.spirit-pill h4{font-family:var(--sans);font-weight:500;font-size:14px;color:var(--ink);letter-spacing:.04em;transition:color .25s}

/* =================================================================
   4 · 复古电视机
   ================================================================= */
.tv-section{
  background:linear-gradient(180deg,var(--paper-2),var(--paper-3));
  padding:160px 8vw;position:relative;
}
.tv-wrap{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}

/* Panasonic-style vintage TV — grey chassis · bold rounded shape · brand strip */
.tv-frame{
  position:relative;
  background:
    radial-gradient(ellipse at 30% 12%, rgba(255,255,255,.10), transparent 55%),
    linear-gradient(170deg, #6B6B6D 0%, #5A5A5C 30%, #4A4A4C 70%, #3D3D3F 100%);
  border-radius:32px 32px 28px 28px;
  padding:54px 50px 14px;
  box-shadow:
    inset 0 4px 6px rgba(255,255,255,.16),
    inset 0 -14px 22px rgba(0,0,0,.32),
    0 6px 0 #2E2E30,                /* base shadow / TV stand suggestion */
    0 60px 90px -30px rgba(0,0,0,.55);
}
.tv-frame::before{
  /* subtle vertical seam highlight */
  content:"";position:absolute;top:18px;bottom:18px;left:18px;right:18px;
  border-radius:24px;border:1px solid rgba(255,255,255,.05);pointer-events:none;
}
.tv-screen{
  position:relative;aspect-ratio:4/3;background:#0a0a0c;border-radius:24px;overflow:hidden;
  box-shadow:
    inset 0 0 80px rgba(0,0,0,.9),
    inset 0 0 240px rgba(80,160,200,.04),
    0 0 0 12px #1F1F21,    /* inner bezel */
    0 0 0 14px #2E2E30,    /* outer bezel */
    0 4px 16px rgba(0,0,0,.4);
}
.tv-screen::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 30% 15%, rgba(255,255,255,.08), transparent 50%),
    radial-gradient(ellipse at 70% 90%, rgba(255,200,150,.05), transparent 50%);
  pointer-events:none;z-index:5;
}
.tv-screen::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(
    to bottom,transparent 0,transparent 2px,
    rgba(0,0,0,.15) 2px,rgba(0,0,0,.15) 3px
  );
  pointer-events:none;z-index:6;mix-blend-mode:multiply;
}
.tv-screen .channel{
  position:absolute;inset:0;display:grid;place-items:center;
  text-align:center;padding:24px 30px;color:var(--gold-light);
  opacity:0;transition:opacity .8s ease;font-family:var(--sans);
}
.tv-screen .channel.on{opacity:1}
.tv-screen .channel .ch-meta{display:flex;flex-direction:column;align-items:center;gap:8px}
.tv-screen .channel .ch-no{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:#A8C8FF;text-transform:uppercase;opacity:.85}
.tv-screen .channel .ch-emoji{font-size:clamp(38px,5.4vw,64px);line-height:1;filter:drop-shadow(0 0 16px rgba(232,201,124,.4))}
.tv-screen .channel h4{font-family:var(--sans);font-weight:500;font-size:clamp(20px,2.2vw,28px);color:var(--gold-light);text-shadow:0 0 20px rgba(232,201,124,.5);line-height:1.25;letter-spacing:.04em;margin:0}
.tv-screen .channel .ch-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:4px 0}
.tv-screen .channel .ch-tags span{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;color:rgba(168,200,255,.85);padding:3px 9px;background:rgba(168,200,255,.1);border:1px solid rgba(168,200,255,.25);border-radius:99px}
.tv-screen .channel .ch-desc{font-family:var(--serif);font-style:italic;font-size:12px;color:rgba(232,201,124,.75);line-height:1.5;max-width:80%;margin:6px 0 0}
.tv-screen .static{
  position:absolute;inset:0;background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,.15), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(255,255,255,.1), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(255,255,255,.12), transparent),
    radial-gradient(1px 1px at 40% 80%, rgba(255,255,255,.08), transparent);
  z-index:4;animation:noise .12s steps(2) infinite;
}
@keyframes noise{0%,100%{background-position:0 0}50%{background-position:10px 5px}}

/* Panasonic-style bottom strip — brand text centered, mini control panel on right */
.tv-controls{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;padding:24px 30px 18px;gap:20px;
}
.tv-controls .speaker{
  height:24px;
  background:repeating-linear-gradient(90deg, rgba(0,0,0,.45) 0 2px, transparent 2px 4px);
  border-radius:2px;opacity:.6;
}
.tv-brand{
  font-family:var(--latin);font-style:italic;font-weight:600;font-size:18px;
  color:#E8E8EA;letter-spacing:.04em;text-align:center;
  text-shadow:0 1px 0 rgba(0,0,0,.4);
  padding:6px 18px;border-radius:99px;
  background:linear-gradient(180deg, rgba(0,0,0,.18), rgba(0,0,0,.05));
}
.tv-panel{
  display:flex;align-items:center;justify-content:flex-end;gap:6px;
}
.tv-panel .led{
  width:5px;height:5px;border-radius:99px;background:#E89970;
  box-shadow:0 0 6px rgba(232,151,112,.7);animation:led-pulse 2s ease-in-out infinite;
}
@keyframes led-pulse{0%,100%{opacity:.4}50%{opacity:1}}
.tv-panel .btn-strip{
  width:32px;height:18px;
  background:linear-gradient(180deg,#2A2A2C,#1A1A1C);border-radius:3px;
  border:1px solid rgba(255,255,255,.06);
  display:flex;justify-content:space-around;align-items:center;padding:0 3px;
}
.tv-panel .btn-strip span{display:block;width:1.5px;height:8px;background:rgba(255,255,255,.25);border-radius:1px}
.tv-panel .knob-small{
  width:18px;height:18px;border-radius:99px;
  background:radial-gradient(circle at 30% 30%, #6A6A6C 0%, #3A3A3C 70%);
  box-shadow:inset 0 -1px 2px rgba(0,0,0,.6), 0 1px 2px rgba(0,0,0,.3);
}

.tv-info h3{font-family:var(--sans);font-weight:500;font-size:clamp(34px,4.4vw,60px);line-height:1.12;color:var(--ink);margin-bottom:24px;letter-spacing:.02em}
.tv-info h3 em{font-style:normal;color:var(--accent);font-weight:600}
.tv-info .lead{font-size:16px;color:var(--ink-soft);line-height:1.85;margin-bottom:30px;max-width:520px}
.tv-channels{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin-top:30px}
.tv-channel-btn{
  display:flex;align-items:center;gap:14px;
  padding:14px 18px;background:#fff;border:1px solid var(--line-soft);border-radius:10px;
  cursor:pointer;transition:all .2s ease;text-align:left;font-family:var(--sans);
}
.tv-channel-btn:hover,.tv-channel-btn.active{border-color:var(--accent);background:#fff}
.tv-channel-btn.active{box-shadow:0 0 0 2px rgba(74,117,229,.15)}
.tv-channel-btn .ch-no{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--accent);text-transform:uppercase}
.tv-channel-btn .ch-name{font-family:var(--sans);font-size:14px;color:var(--ink);font-weight:500;letter-spacing:.02em;margin-top:2px}

/* =================================================================
   5 · 精神坐标 banner
   ================================================================= */
.taste-section{
  position:relative;padding:140px 8vw;overflow:hidden;
  background:
    radial-gradient(ellipse 60% 80% at 80% 50%, rgba(180,100,140,.18) 0%, transparent 65%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(255,180,100,.10) 0%, transparent 60%),
    linear-gradient(135deg,var(--accent-deep) 0%,#0E1F4D 100%);
  color:#fff;
}
.taste-section::before{
  content:"";position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1, 0 0 0 0 1, 0 0 0 0 1, 0 0 0 0.10 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode:overlay;opacity:.35;pointer-events:none;
}
/* tiny stars dust */
.taste-section::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, rgba(255,228,180,.7), transparent 60%),
    radial-gradient(1px 1px at 28% 65%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 42% 15%, rgba(255,228,180,.6), transparent 60%),
    radial-gradient(1px 1px at 88% 28%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 72% 78%, rgba(255,228,180,.5), transparent 60%),
    radial-gradient(1px 1px at 58% 88%, rgba(255,255,255,.5), transparent 60%);
}
.taste-inner{
  position:relative;z-index:5;max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1.05fr 1fr;gap:80px;align-items:center;
}
.taste-text .pin{
  font-family:var(--mono);font-size:11px;letter-spacing:.32em;
  display:block;margin-bottom:30px;opacity:.75;text-transform:uppercase;color:var(--gold-light);
}
.taste-text h2{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(40px,5vw,76px);line-height:1.1;margin-bottom:12px;letter-spacing:.01em;
}
.taste-text h2 em{font-style:normal;color:var(--gold-light);font-weight:700}
.taste-text .sub-en{
  font-family:var(--latin);font-style:italic;font-size:clamp(18px,1.5vw,26px);
  color:rgba(255,255,255,.6);font-weight:400;letter-spacing:.02em;margin-bottom:32px;display:block;
}

/* ① 乔布斯核心 */
.taste-jobs{
  font-family:var(--serif);font-weight:400;font-size:16.5px;line-height:1.8;
  color:rgba(255,255,255,.82);max-width:560px;margin:0 0 22px;
  padding-left:16px;border-left:2px solid rgba(255,215,168,.4);
}
.taste-jobs em{font-style:normal;color:var(--gold-light);font-weight:500}
.taste-jobs .speaker{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  color:rgba(255,215,168,.7);text-transform:none;
  margin-right:6px;font-weight:500;
}
.taste-picasso .cn .speaker{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  color:rgba(255,215,168,.7);text-transform:none;
  margin-right:6px;font-weight:500;
}

/* ② 永乐洞察 · 2 行 */
.taste-belief{
  font-family:var(--serif);font-weight:400;font-size:16.5px;line-height:1.8;
  color:rgba(255,255,255,.82);margin:0 0 24px;max-width:560px;
}
.taste-belief em{font-style:normal;color:#fff;font-weight:600}

/* ③ 毕加索引用 · glass card */
.taste-picasso{
  margin:0 0 26px;padding:18px 22px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
  border-radius:10px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.taste-picasso .cn{
  font-family:var(--serif);font-weight:500;font-size:17px;color:#fff;
  line-height:1.55;margin-bottom:4px;
}
.taste-picasso .cn em{font-style:normal;color:var(--gold-light);font-weight:600}
.taste-picasso .en{
  font-family:var(--latin);font-style:italic;font-size:14px;
  color:rgba(255,255,255,.55);letter-spacing:.02em;margin-bottom:12px;
}
.taste-picasso .en .src{margin-left:6px;color:rgba(255,215,168,.55)}
.taste-picasso .note{
  font-family:var(--serif);font-size:13.5px;line-height:1.75;
  color:rgba(255,255,255,.68);padding-top:12px;
  border-top:1px dashed rgba(255,255,255,.10);
}
.taste-picasso .note em{font-style:normal;color:rgba(232,201,124,.92);font-weight:500}

/* ④ 金句收尾 */
.taste-punchline{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(22px,2.5vw,32px);
  color:#fff;line-height:1.45;letter-spacing:.005em;
  margin:20px 0 14px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
}
.taste-punchline em{font-style:normal;color:var(--gold-light);font-weight:700}

/* attribution */
.taste-attr{
  margin-top:12px;font-family:var(--mono);font-size:11px;letter-spacing:.22em;
  color:rgba(255,255,255,.45);text-transform:uppercase;
}
.taste-attr span{color:var(--gold-light)}

/* portrait — set inside a "deep-space frame" */
.taste-figure{
  position:relative;width:100%;aspect-ratio:5/6;
  display:grid;place-items:center;
}
/* Clean rectangular frame · 金色细描边 + 微金光晕 + 立体阴影 */
.taste-figure .img-wrap{
  position:relative;width:100%;height:100%;
  border-radius:6px;overflow:hidden;
  box-shadow:
    /* gold hairline edge */
    0 0 0 1px rgba(232,201,124,.32),
    /* outer warm halo · 像深夜里被聚光的瞬间 */
    0 0 90px -10px rgba(232,201,124,.20),
    0 0 180px -40px rgba(255,180,100,.18),
    /* solid drop shadow for physical weight */
    0 30px 70px -20px rgba(0,0,0,.55),
    /* inset gentle dim toward edges (not aggressive) */
    inset 0 0 80px rgba(10,21,48,.32);
}
.taste-figure img{
  width:100%;height:100%;object-fit:cover;display:block;
  /* slight grade — integrate with cosmic blue but keep crisp */
  filter:saturate(.88) contrast(1.04) brightness(.96);
}
/* Bottom soft gradient — caption legibility + atmospheric anchor */
.taste-figure .img-wrap::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:42%;
  background:linear-gradient(180deg,
    transparent 0%,
    rgba(10,21,48,.25) 55%,
    rgba(10,21,48,.65) 100%
  );
  pointer-events:none;z-index:2;
}
/* Top very subtle highlight · 镜面光暗示 */
.taste-figure .img-wrap::before{
  content:"";position:absolute;left:0;right:0;top:0;height:25%;
  background:linear-gradient(180deg,
    rgba(255,255,255,.04) 0%,
    transparent 100%
  );
  pointer-events:none;z-index:2;
}
.taste-figure .placeholder{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--serif);font-size:18px;color:rgba(255,255,255,.5);text-align:center;line-height:1.6;
  border:1px dashed rgba(255,255,255,.18);border-radius:50%;
}
.taste-figure .caption{
  position:absolute;left:50%;bottom:-10px;transform:translateX(-50%);
  font-family:var(--latin);font-style:italic;font-size:14px;
  color:rgba(255,215,168,.7);letter-spacing:.08em;white-space:nowrap;
}

@media (max-width:900px){
  .taste-inner{grid-template-columns:1fr;gap:50px}
  .taste-figure{aspect-ratio:4/5;max-width:420px;margin:0 auto;order:-1}
  .taste-quote{max-width:none}
}

/* =================================================================
   6 · 在线分享
   ================================================================= */
.share-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:1400px;margin:60px auto 0}
.share-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:40px 32px;
  transition:transform .3s,border-color .3s,box-shadow .3s;position:relative;overflow:hidden;display:block;font-family:var(--sans);
}
.share-card:hover{transform:translateY(-6px);border-color:var(--accent);box-shadow:0 20px 40px -25px rgba(74,117,229,.3)}
.share-card .tag{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--accent);margin-bottom:20px;text-transform:uppercase;font-weight:400}
.share-card h4{font-family:var(--sans);font-weight:500;font-size:24px;color:var(--ink);margin-bottom:10px;letter-spacing:.02em}
.share-card p{color:var(--ink-soft);font-size:13.5px;line-height:1.7;margin-bottom:22px}
.share-card .arrow{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--accent);text-transform:uppercase}

/* =================================================================
   CLOSING
   ================================================================= */
.closing{
  position:relative;padding:140px 8vw;text-align:center;overflow:hidden;
  background:linear-gradient(180deg,var(--blue) 0%,var(--blue-2) 30%,var(--dusk) 60%,var(--sunset-2) 85%,var(--dawn) 100%);color:#fff;
}
.closing::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(1px 1px at 20% 15%, rgba(255,255,255,.6), transparent),
    radial-gradient(1px 1px at 70% 10%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 45% 25%, rgba(255,255,255,.7), transparent),
    radial-gradient(1px 1px at 88% 35%, rgba(255,255,255,.4), transparent);
}
.closing-inner{position:relative;z-index:5}
.closing h2{font-family:var(--sans);font-weight:500;font-size:clamp(40px,6vw,108px);line-height:1.05;margin-bottom:30px;letter-spacing:.02em}
.closing h2 em{font-style:normal;color:var(--gold-light);font-weight:600}
.closing p{font-size:17px;max-width:620px;margin:0 auto 40px;line-height:1.85;color:rgba(255,255,255,.85)}
.closing p strong{color:var(--gold-light);font-weight:500}
.closing .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* =================================================================
   MENTORS · 导师阵容
   ================================================================= */
/* Carousel rail: 4 visible by default, horizontal scroll for more */
.mentors-rail-wrap{position:relative;max-width:1400px;margin:0 auto}
.mentors-rail{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  scroll-behavior:smooth;padding:6px 4px 26px;
  -ms-overflow-style:none;scrollbar-width:none;
}
.mentors-rail::-webkit-scrollbar{display:none}
.mentors-rail .mentor-card{
  flex:0 0 calc((100% - 48px) / 4);
  min-width:240px;scroll-snap-align:start;
}
@media (max-width:1100px){.mentors-rail .mentor-card{flex:0 0 calc((100% - 32px) / 3)}}
@media (max-width:720px) {.mentors-rail .mentor-card{flex:0 0 calc((100% - 16px) / 2)}}
@media (max-width:480px) {.mentors-rail .mentor-card{flex:0 0 calc(100% - 32px)}}

/* arrow buttons */
.rail-arrow{
  position:absolute;top:42%;transform:translateY(-50%);z-index:10;
  width:46px;height:46px;border-radius:50%;background:#fff;
  border:1px solid var(--line-soft);color:var(--ink);cursor:pointer;
  display:grid;place-items:center;
  box-shadow:0 10px 24px -10px rgba(0,0,0,.25);
  transition:all .2s ease;
}
.rail-arrow:hover{background:var(--accent);color:#fff;border-color:var(--accent);transform:translateY(-50%) scale(1.06)}
.rail-arrow:disabled{opacity:.3;pointer-events:none}
.rail-arrow.prev{left:-22px}
.rail-arrow.next{right:-22px}
.rail-arrow svg{width:18px;height:18px}
@media (max-width:760px){.rail-arrow{display:none}}
/* progress dots */
.rail-dots{
  display:flex;justify-content:center;gap:8px;margin-top:14px;
}
.rail-dots span{
  width:6px;height:6px;border-radius:99px;background:var(--line);transition:all .25s;
}
.rail-dots span.on{width:22px;background:var(--accent)}
/* photo-led mentor card · big portrait on top + structured info below */
.mentor-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:12px;
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.mentor-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 26px -14px rgba(74,117,229,.3)}
.mentor-card.featured{border-color:var(--accent);box-shadow:0 14px 26px -14px rgba(74,117,229,.25)}
/* photo cover · 4:5 portrait aspect */
.mentor-card .photo{
  aspect-ratio:4/5;width:100%;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--paper-2),var(--paper-3));
  display:grid;place-items:center;color:var(--ink-mute);
}
.mentor-card .photo img{width:100%;height:100%;object-fit:cover;display:block}
.mentor-card .photo .placeholder{
  position:relative;z-index:1;
  font-family:var(--mono);font-weight:500;font-size:9px;letter-spacing:.22em;text-transform:uppercase;
  text-align:center;line-height:1.4;
}
.mentor-card .photo::after{
  content:"";position:absolute;inset:20px;border:1px dashed rgba(14,18,24,.18);border-radius:6px;
  pointer-events:none;opacity:1;
}
.mentor-card .photo:has(img)::after{display:none}
/* info area below photo */
.mentor-card .info{
  padding:16px 18px 18px;display:flex;flex-direction:column;gap:3px;flex:1;
}
.mentor-card h4{font-family:var(--sans);font-weight:500;font-size:16px;color:var(--ink);margin:0;letter-spacing:.02em;line-height:1.3}
.mentor-card .role{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;color:var(--accent);text-transform:uppercase;margin:0 0 6px}
.mentor-card .featured-role{color:var(--red)}
.mentor-card .bio{font-size:12.5px;color:var(--ink-soft);line-height:1.65;margin:0}
.mentor-card .bio em{font-style:normal;color:var(--ink);font-weight:500}
.mentor-card .status{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;color:var(--ink-mute);text-transform:uppercase;
  padding-top:10px;margin-top:auto;border-top:1px dashed var(--line-soft);
}

.mentor-cats{
  max-width:1400px;margin:0 auto 36px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;
}
.mentor-cats .label{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--ink-mute);text-transform:uppercase;margin-right:8px}
.mentor-cats .cat{
  padding:7px 14px;background:#fff;border:1px solid var(--line-soft);border-radius:99px;
  font-size:12.5px;color:var(--ink-soft);letter-spacing:.04em;
}
.mentor-cats .cat.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* =================================================================
   ALUMNI · 校友圈
   ================================================================= */
.alumni-section{
  padding:160px 8vw;background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);
  position:relative;overflow:hidden;
}
.alumni-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:start;max-width:1400px;margin:60px auto 0}
.alumni-timeline{display:grid;gap:14px}
.alumni-row{
  display:grid;grid-template-columns:90px 1fr auto;gap:24px;align-items:center;
  padding:22px 28px;background:#fff;border:1px solid var(--line-soft);border-radius:14px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.alumni-row:hover{transform:translateX(4px)}
.alumni-row.active{border-color:var(--accent);box-shadow:0 8px 24px -12px rgba(74,117,229,.3)}
.alumni-row.future{opacity:.55;background:var(--paper)}
.alumni-row .when{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--accent);letter-spacing:.05em}
.alumni-row .what h5{font-family:var(--sans);font-weight:500;font-size:17px;color:var(--ink);letter-spacing:.02em;margin-bottom:3px}
.alumni-row .what small{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--ink-mute);text-transform:uppercase;font-weight:400}
.alumni-row .count{font-family:var(--latin);font-style:italic;font-size:30px;color:var(--accent);font-weight:500;line-height:1}
.alumni-row.future .count{color:var(--ink-mute)}
.alumni-aside{
  background:linear-gradient(135deg,var(--accent-deep) 0%,#0E1F4D 100%);color:#fff;
  border-radius:18px;padding:50px 40px;text-align:center;position:relative;overflow:hidden;
}
.alumni-aside::before{
  content:"";position:absolute;width:300px;height:300px;border-radius:99px;
  background:radial-gradient(circle,rgba(232,201,124,.2),transparent 60%);
  top:-100px;right:-100px;
}
.alumni-aside .yc{font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--gold-light);margin-bottom:18px;text-transform:uppercase;position:relative}
.alumni-aside h4{font-family:var(--sans);font-weight:500;font-size:26px;line-height:1.35;margin-bottom:18px;position:relative;letter-spacing:.02em}
.alumni-aside h4 em{font-style:normal;color:var(--gold-light);font-weight:600}
.alumni-aside p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:24px;position:relative}
.alumni-aside .badge{font-family:var(--mono);font-size:10px;letter-spacing:.25em;color:rgba(255,255,255,.6);text-transform:uppercase;padding:8px 16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:99px;display:inline-block;position:relative}

/* =================================================================
   PHILOSOPHY HUB · 理念中心
   ================================================================= */
.hub-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;max-width:1400px;margin:60px auto 0}
.hub-feature{
  background:linear-gradient(135deg,var(--ink) 0%,#1A1F2E 100%);color:#fff;
  border-radius:18px;padding:54px 48px;position:relative;overflow:hidden;
  display:flex;flex-direction:column;justify-content:space-between;min-height:380px;
}
.hub-feature::before{
  content:"";position:absolute;width:400px;height:400px;border-radius:99px;
  background:radial-gradient(circle,rgba(74,117,229,.18),transparent 70%);
  top:-100px;right:-100px;
}
.hub-feature .pin{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--gold-light);margin-bottom:18px;text-transform:uppercase;position:relative}
.hub-feature h3{font-family:var(--sans);font-weight:500;font-size:38px;line-height:1.15;margin-bottom:18px;letter-spacing:.02em;position:relative}
.hub-feature h3 em{font-style:normal;color:var(--gold-light);font-weight:600}
.hub-feature p{font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.85;margin-bottom:28px;max-width:520px;position:relative}
.hub-feature .hub-cta{
  display:inline-flex;align-items:center;gap:10px;padding:14px 26px;align-self:flex-start;
  background:var(--gold);color:var(--ink);border-radius:99px;
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:500;
  position:relative;transition:background .25s,transform .25s;
}
.hub-feature .hub-cta:hover{background:var(--gold-light);transform:translateY(-1px)}
.hub-side{display:grid;gap:14px}
.hub-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:14px;
  padding:24px 26px;display:block;
  transition:transform .25s ease,border-color .25s ease;
}
.hub-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.hub-card .tag{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;margin-bottom:10px}
.hub-card h5{font-family:var(--sans);font-weight:500;font-size:17px;color:var(--ink);margin-bottom:6px;letter-spacing:.02em}
.hub-card p{font-size:12.5px;color:var(--ink-soft);line-height:1.6}
.hub-card .arrow{margin-top:10px;font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase}

/* =================================================================
   APPLY · 招募报名
   ================================================================= */
.apply-section{
  padding:160px 8vw;background:var(--ink);color:#fff;position:relative;overflow:hidden;
}
.apply-section::before{
  content:"";position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1, 0 0 0 0 1, 0 0 0 0 1, 0 0 0 0.1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode:overlay;opacity:.4;pointer-events:none;
}
.apply-section::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 50% at 20% 30%,rgba(74,117,229,.18),transparent 60%),
             radial-gradient(ellipse 50% 40% at 80% 70%,rgba(232,201,124,.12),transparent 60%);
}
.apply-inner{position:relative;z-index:5;max-width:1400px;margin:0 auto}
.apply-head{text-align:center;margin-bottom:60px}
.apply-head .pin{font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--gold-light);text-transform:uppercase;margin-bottom:24px;display:inline-block}
.apply-head h2{font-family:var(--sans);font-weight:500;font-size:clamp(40px,5.4vw,80px);line-height:1.08;letter-spacing:.02em;margin-bottom:24px;color:#fff}
.apply-head h2 em{font-style:normal;color:var(--gold-light);font-weight:600}
.apply-head p{font-size:16px;color:rgba(255,255,255,.7);max-width:620px;margin:0 auto;line-height:1.85}
.cohort-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:50px}
.cohort{
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(40px) saturate(180%);
  -webkit-backdrop-filter:blur(40px) saturate(180%);
  border:1px solid rgba(255,255,255,.12);
  border-radius:18px;padding:46px 40px;position:relative;overflow:hidden;
  transition:transform .3s ease,border-color .3s ease;
}
.cohort.live{border-color:rgba(232,201,124,.5);background:rgba(232,201,124,.06)}
.cohort.live::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--gold-light),transparent);
}
.cohort .status{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:99px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;font-weight:500;
  margin-bottom:26px;
}
.cohort .status.closed{background:rgba(255,255,255,.06);color:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.12)}
.cohort .status.open{background:var(--gold);color:var(--ink)}
.cohort .status.open .dot{width:6px;height:6px;background:var(--ink);border-radius:99px;animation:pulse-dot 1.5s ease-in-out infinite}
.cohort .label{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:rgba(255,255,255,.55);text-transform:uppercase;margin-bottom:8px}
.cohort h3{font-family:var(--sans);font-weight:500;font-size:38px;line-height:1;color:#fff;margin-bottom:10px;letter-spacing:.02em}
.cohort h3 em{font-style:normal;color:var(--gold-light);font-weight:600}
.cohort .when{font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.72);letter-spacing:.06em;margin-bottom:28px}
.cohort .meta-list{display:grid;gap:0;margin-bottom:30px;font-family:var(--sans)}
.cohort .meta-list .row{display:grid;grid-template-columns:90px 1fr;gap:18px;padding:12px 0;border-top:1px solid rgba(255,255,255,.08);font-size:13.5px;align-items:center}
.cohort .meta-list .row .k{color:rgba(255,255,255,.5);font-family:var(--mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase}
.cohort .meta-list .row .v{color:#fff;font-weight:400}
.cohort .meta-list .row .v strong{color:var(--gold-light);font-weight:500}
.cohort .apply-btn{
  display:inline-flex;align-items:center;gap:10px;padding:15px 30px;
  background:var(--gold);color:var(--ink);border-radius:99px;
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.04em;
  transition:all .25s ease;cursor:pointer;border:none;text-decoration:none;
}
.cohort .apply-btn:hover{background:var(--gold-light);transform:translateY(-1px)}
.cohort .apply-btn-disabled{
  display:inline-flex;align-items:center;gap:10px;padding:15px 30px;
  background:rgba(255,255,255,.06);color:rgba(255,255,255,.4);border-radius:99px;
  font-family:var(--sans);font-size:14px;font-weight:400;letter-spacing:.04em;cursor:not-allowed;
  border:1px solid rgba(255,255,255,.1);
}
.apply-foot{text-align:center;font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:rgba(255,255,255,.5);text-transform:uppercase}
.apply-foot a{color:var(--gold-light);text-decoration:underline;text-underline-offset:3px}
.apply-foot a:hover{color:#fff}

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width:1024px){
  .three-col{grid-template-columns:1fr;gap:16px}
  .cultivate-grid,.tv-wrap,.ceo-split,.share-cards,.alumni-grid,.hub-grid,.cohort-grid{grid-template-columns:1fr;gap:24px}
  .spirits-strip{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr 1fr;gap:30px}
  .triangle-frame{position:static}
}
/* === Mobile nav (hamburger + drawer) CSS now lives in assets/css/site.css ===
   旧的本地重复 CSS 用了 max-width:1024px 旧断点，会在 1024–1180px 这种
   "site.css 已切 hamburger 但内联 CSS 还没切" 的宽度区间下让 burger 隐藏。
   彻底删掉，统一用 site.css 单一来源。 */

@media (max-width:680px){
  section.chap,.tv-section,.closing,.taste-section{padding:70px 18px}
  /* Letter card · mobile-safe: signature stays inside, polaroid below */
  .letter-card{padding:30px 22px 38px;width:min(520px,94vw);max-width:94vw}
  .letter-polaroid{
    position:relative;top:auto;right:auto;bottom:auto;
    width:120px;padding:8px 8px 22px;margin:18px auto 6px;
    transform:rotate(3deg);float:none;
  }
  .letter-polaroid .cap{font-size:15px}
  body{overflow-x:hidden}
  .six-mini,.four-grid{grid-template-columns:1fr 1fr}
  .marquee-wrap{padding:50px 0}
  /* Hero: lift content up · less padding, smaller h1, content centered */
  .hero{padding:100px 5vw 50px;min-height:auto;cursor:auto}
  #cursorCanvas{display:none}
  /* Letter signature: stack name + sig vertically, but keep within bounds */
  .letter-sig{flex-direction:column;align-items:stretch;gap:14px;margin-top:18px}
  .letter-sig .sig-cta{align-self:flex-start;font-size:14px;padding-bottom:8px}
  .letter-sig .sig-left{align-items:flex-start;justify-content:flex-start}
  .letter-sig .sig-right{align-items:flex-start;text-align:left}
  .letter-sig .sig-img{max-width:140px;height:auto}
  /* Hero content nudges */
  .hero-badge{margin-bottom:30px;font-size:11px;padding:6px 14px}
  .hero h1{margin-bottom:28px}
  .hero-lede{margin-bottom:30px}
  .hero-cta{flex-direction:column;align-items:stretch;gap:10px}
  .hero-cta .btn{width:100%;justify-content:center}
  /* Hide non-essential decorations on mobile */
  .marquee-title{font-size:clamp(28px,6.5vw,42px);padding:0 18px;line-height:1.3}
}
@media (max-width:480px){
  .letter-card{padding:26px 18px 32px;width:96vw}
  .letter-polaroid{width:100px}
  .letter-body{font-size:13.5px}
  section.chap,.tv-section,.closing,.taste-section{padding:60px 16px}
  .hero{padding:90px 5vw 40px}
  .marquee-title{font-size:26px}
}

/* reveal */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .9s ease,transform .9s ease}
.reveal.in{opacity:1;transform:none}

nav,header,section,footer{position:relative;z-index:2}