/* ==========================================================
   OPTION C \2014  built on Option A's system.
   New: hero "stage & rail", compact timeline board, featured research index.
   ========================================================== */
@property --sc{syntax:"<color>"; inherits:true; initial-value:#667BC6}

/* ---------- Hero: tinted frame \b7  colour stage \b7  slide rail ---------- */
.hero.hc{padding:16px 16px 0; overflow:visible}
.hc-frame{--sc:#667BC6; position:relative; isolation:isolate; overflow:hidden; padding:112px 44px 44px; border-radius:40px;
  background:color-mix(in srgb, var(--sc) 17%, #F7F7F5); transition:--sc 1.2s var(--ease);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.7)}
.hc-bg{position:absolute; inset:0; z-index:-1; pointer-events:none}
.hc-bg::before{content:""; position:absolute; inset:0; background:radial-gradient(55% 60% at 8% 0%, rgba(255,255,255,.85), transparent 60%), radial-gradient(45% 55% at 100% 100%, rgba(255,255,255,.55), transparent 60%)}
.hc-bg::after{content:""; position:absolute; inset:0; background-image:var(--grain); opacity:.7}
.hc-orb{position:absolute; border-radius:50%; filter:blur(60px); opacity:.55; background:color-mix(in srgb, var(--sc) 45%, #fff)}
.hc-orb.a{width:420px; height:420px; top:-120px; inset-inline-start:30%}
.hc-orb.b{width:360px; height:360px; bottom:-160px; inset-inline-start:-80px; background:color-mix(in srgb, var(--sc) 30%, #FCEFE7)}
.hc-verse{position:absolute; bottom:18px; inset-inline-start:48px; font-family:var(--f-nq); font-size:26px; line-height:2; white-space:nowrap; color:color-mix(in srgb, var(--sc) 70%, #333); opacity:.12; direction:rtl}

.hc-grid{display:grid; grid-template-columns:minmax(0, 1fr) 216px; gap:32px; align-items:stretch}
.hc .slides{grid-template-columns:minmax(0, 1fr)}
.hc .slide{min-width:0; grid-template-columns:minmax(0, 1fr) minmax(0, 1fr); gap:44px; min-height:580px; align-items:center}
.hc .slide-text{max-width:600px}
.hc .hero-name{font-size:clamp(52px, 6.4cqi, 94px)}
.hc .lead{max-width:48ch}

.stage-c{--s1:#667BC6; --s2:#8EA6C8; position:relative; align-self:stretch; min-height:580px; overflow:hidden; isolation:isolate; border-radius:34px;
  background:radial-gradient(90% 70% at 85% 0%, color-mix(in srgb, var(--s2) 85%, #fff), transparent 62%), radial-gradient(70% 60% at 0% 100%, color-mix(in srgb, var(--s1) 70%, #fff), transparent 60%), linear-gradient(165deg, var(--s1), color-mix(in srgb, var(--s1) 86%, #3A3F5C));
  box-shadow:0 40px 80px -42px color-mix(in srgb, var(--s1) 90%, transparent), inset 0 0 0 1px rgba(255,255,255,.18)}
.stage-c::after{content:""; position:absolute; inset:0; z-index:5; pointer-events:none; background-image:var(--grain); opacity:.8}
.st-callig{position:absolute; z-index:0; top:-8%; inset-inline-end:-2%; font-family:var(--f-nq); font-size:340px; line-height:1.4; color:#fff; opacity:.1; white-space:nowrap; user-select:none}
.st-photo{position:absolute; z-index:1; bottom:0; left:50%; width:68%; aspect-ratio:4 / 5; transform:translateX(-50%); border-radius:30px 30px 0 0; --p1:#EEF1FA; --p2:#E7E0F4; --p3:#D7DEEE; --p4:#C2CCE2; box-shadow:0 -20px 50px -20px rgba(30,40,80,.35)}
.seal{position:absolute; z-index:3; top:26px; inset-inline-start:26px; display:grid; place-items:center; width:128px; height:128px; border-radius:50%; color:#fff; background:rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.42); -webkit-backdrop-filter:blur(12px); backdrop-filter:blur(12px)}
.seal svg{position:absolute; inset:0; width:100%; height:100%; animation:spin 48s linear infinite}
.seal text{font-family:var(--f-ui); font-size:12.5px; font-weight:700; letter-spacing:.2em; fill:#fff}
[dir="rtl"] .seal text{font-family:var(--f-ur); font-size:14px; font-weight:600}
.seal-mark{font-family:var(--f-nq); font-size:30px; line-height:1; padding-top:14px}
.st-card{position:absolute; z-index:4; bottom:26px; inset-inline-end:22px; display:flex; align-items:center; gap:12px; padding:10px 18px 10px 10px; border-radius:20px; font-size:13px; line-height:1.35}
[dir="rtl"] .st-card{padding:10px 10px 10px 18px}
.st-card b{display:block; font-size:14px}
.st-card span{color:var(--ink-2)}
.st-card .mini{width:40px}
.st-book{position:absolute; z-index:2; inset:0; display:grid; place-items:center}
.st-book::before{content:""; position:absolute; width:62%; aspect-ratio:1; border-radius:50%; background:radial-gradient(circle, rgba(255,255,255,.34), transparent 66%)}
.st-book .cover{width:min(250px, 50%); transform:rotate(calc(var(--dirx) * -4deg)); box-shadow:0 50px 60px -30px rgba(20,30,60,.55), 0 14px 22px -14px rgba(0,0,0,.3)}
.st-book.up .cover{transform:rotate(calc(var(--dirx) * 3deg))}
.st-flag{position:absolute; z-index:4; top:26px; inset-inline-start:26px; display:inline-flex; align-items:center; gap:8px; height:38px; padding-inline:14px; border-radius:999px; font-size:12.5px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:#fff; background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.45); -webkit-backdrop-filter:blur(12px); backdrop-filter:blur(12px)}
.st-flag .ico{width:15px; height:15px}
[dir="rtl"] .st-flag{font-size:14px}
.stage-c .fan{position:absolute; z-index:2; inset:0; min-height:0}
.stage-c .fan .cover{width:min(180px, 34%)}

/* rail */
.rail-c{display:flex; flex-direction:column; justify-content:center; gap:18px}
.hc .dots{display:flex; flex-direction:column; gap:10px; flex:none}
.hc .dot{position:relative; display:grid; grid-template-columns:44px minmax(0, 1fr); align-items:center; gap:12px; width:auto; padding:9px 12px 9px 9px; border-radius:18px; text-align:start; background:rgba(255,255,255,.42); border:1px solid rgba(255,255,255,.75); transition:background .4s var(--ease), box-shadow .4s var(--ease), transform .4s var(--ease)}
[dir="rtl"] .hc .dot{padding:9px 9px 9px 12px}
.hc .dot:hover{background:rgba(255,255,255,.7)}
.hc .dot.is-active{background:rgba(255,255,255,.92); box-shadow:var(--sh-1); transform:translateX(calc(var(--dirx) * -6px))}
.hc .dot .thumb{display:grid; place-items:center; width:44px; height:56px; overflow:hidden; border-radius:11px; color:#fff; font-family:var(--f-nq); font-size:17px; padding-top:6px; background:linear-gradient(160deg, var(--c), color-mix(in srgb, var(--c) 65%, #fff))}
.hc .dot .thumb .mini{width:28px; margin-top:-6px}
.hc .dot .n{flex-direction:column; align-items:flex-start; gap:1px; white-space:normal; font-size:11px; color:var(--ink-3)}
.hc .dot .n span{font-size:13.5px; font-weight:650; letter-spacing:0; color:var(--ink-2); line-height:1.3; overflow:visible}
.hc .dot.is-active .n span{color:var(--ink)}
[dir="rtl"] .hc .dot .n span{font-size:14.5px; font-weight:600}
.hc .dot .bar{position:absolute; inset-block:14px; inset-inline-start:-11px; width:3px; height:auto; background:rgba(51,55,61,.1)}
.hc .dot .bar b{width:100%; height:100%; transform:scaleY(0); transform-origin:top; background:linear-gradient(180deg, var(--indigo), var(--teal))}
[dir="rtl"] .hc .dot .bar b{transform-origin:top}
.hc .dot.is-active .bar b{animation-name:fillY}
.hero.hc.no-auto .dot.is-active .bar b{transform:scaleY(1)}
@keyframes fillY{to{transform:scaleY(1)}}
.rail-c .arrows{display:flex; gap:8px; padding-inline-start:4px}

/* ---------- Selected research: featured card + index ---------- */
.pc{display:grid; grid-template-columns:minmax(0, 1fr) minmax(0, 1.08fr); gap:22px; align-items:stretch}
.pc-feature{position:relative; overflow:hidden; isolation:isolate; display:flex; flex-direction:column; gap:18px; padding:40px; border-radius:32px;
  background:linear-gradient(160deg, color-mix(in srgb, var(--acc) 34%, #fff), color-mix(in srgb, var(--acc) 12%, #fff) 70%); border:1px solid rgba(255,255,255,.95); box-shadow:inset 0 1px 0 #fff, var(--sh-2)}
.pc-feature .kw{position:absolute; z-index:-1; bottom:-70px; inset-inline-end:14px; font-family:var(--f-nq); font-size:230px; line-height:1.6; color:var(--acc-ink); opacity:.13; white-space:nowrap}
.pc-top{display:flex; align-items:center; justify-content:space-between; gap:12px}
.pc-cat{padding:6px 12px; border-radius:999px; font-size:12.5px; font-weight:700; color:var(--acc-ink); background:rgba(255,255,255,.8)}
.pc-yr{font-family:var(--f-display); font-size:48px; line-height:1; color:var(--acc-ink); font-variant-numeric:tabular-nums}
[dir="rtl"] .pc-yr{font-family:var(--f-ur); font-size:34px; font-weight:600}
.pc-feature h3{font-size:30px; line-height:1.2; font-weight:650; letter-spacing:-.025em; max-width:22ch}
[dir="rtl"] .pc-feature h3{font-family:var(--f-nq); font-size:27px; font-weight:700; line-height:1.95; max-width:none}
.pc-feature p{font-size:16px; line-height:1.7; color:var(--ink-2); max-width:46ch}
[dir="rtl"] .pc-feature p{line-height:2}
.pc-meta{display:flex; gap:32px; margin-top:auto; padding-top:18px; border-top:1px solid rgba(51,55,61,.1)}
.pc-meta dt{font-size:11px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-3)}
.pc-meta dd{font-size:15px; font-weight:650}
[dir="rtl"] .pc-meta dt{font-size:12.5px}
.pc-feature.swap > *:not(.kw){animation:rise .6s var(--ease) both}
.pc-feature.swap > *:nth-child(3){animation-delay:.05s}
.pc-feature.swap > *:nth-child(4){animation-delay:.1s}

.pc-list{display:flex; flex-direction:column; padding:10px; border-radius:32px; background:rgba(255,255,255,.66); border:1px solid rgba(255,255,255,.95); box-shadow:var(--sh-1)}
.pc-list-head{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px 16px 10px; font-size:12px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-3)}
[dir="rtl"] .pc-list-head{font-size:14px}
.pc-row{display:grid; grid-template-columns:66px minmax(0, 1fr) 22px; align-items:center; gap:14px; width:100%; padding:15px 16px; border-radius:20px; text-align:start; transition:background .35s var(--ease)}
.pc-row + .pc-row{box-shadow:inset 0 1px 0 var(--line)}
.pc-row .yr{font-family:var(--f-display); font-size:27px; line-height:1; color:var(--ink-3); font-variant-numeric:tabular-nums}
[dir="rtl"] .pc-row .yr{font-family:var(--f-ur); font-size:19px; font-weight:600}
.pc-row b{display:block; font-size:15.5px; line-height:1.35; font-weight:650; color:var(--ink)}
[dir="rtl"] .pc-row b{font-family:var(--f-nq); font-size:15.5px; font-weight:600; line-height:2}
.pc-row .m{display:flex; align-items:center; gap:8px; margin-top:4px; font-size:12.5px; color:var(--ink-2)}
.pc-row .m i{width:7px; height:7px; border-radius:50%; background:var(--acc)}
.pc-row > .ico{width:18px; height:18px; color:var(--ink-3); transition:transform .35s var(--ease)}
.pc-row:hover{background:rgba(255,255,255,.9)}
.pc-row:hover > .ico{transform:translateX(calc(var(--dirx) * 3px))}
.pc-row[aria-current="true"], .pc-row[aria-current="true"] + .pc-row{box-shadow:none}
.pc-row[aria-current="true"]{background:color-mix(in srgb, var(--acc) 20%, #fff)}
.pc-row[aria-current="true"] .yr{color:var(--acc-ink)}
.pc-row[aria-current="true"] > .ico{color:var(--acc-ink)}

/* ---------- Timeline: compact decade board ---------- */
.tlc{display:grid; grid-template-columns:minmax(0, 1.55fr) minmax(0, 1fr); gap:24px; align-items:start}
.tlc-board{padding:6px 28px; border-radius:30px; background:rgba(255,255,255,.62); border:1px solid rgba(255,255,255,.95); box-shadow:var(--sh-1)}
.tlc-row{display:grid; grid-template-columns:100px minmax(0, 1fr); gap:18px; align-items:start; padding-block:13px}
.tlc-row + .tlc-row{border-top:1px solid var(--line)}
.tlc-dec{padding-top:6px; font-family:var(--f-display); font-size:32px; line-height:1; color:var(--ink); font-variant-numeric:tabular-nums}
[dir="rtl"] .tlc-dec{padding-top:8px; font-family:var(--f-ur); font-size:16px; font-weight:600; line-height:1.5}
.tlc-items{display:flex; flex-wrap:wrap; gap:8px}
.tlc-chip{--acc:var(--indigo); display:inline-flex; align-items:center; gap:10px; min-height:44px; padding:6px 14px 6px 7px; border-radius:14px; text-align:start; font-size:14px; font-weight:600; line-height:1.3; color:var(--ink); background:#fff; border:1px solid rgba(51,55,61,.07); transition:background .35s var(--ease), border-color .35s, box-shadow .35s, opacity .35s, transform .35s var(--ease)}
[dir="rtl"] .tlc-chip{padding:6px 7px 6px 14px; font-size:14.5px}
.tlc-chip .y{display:grid; place-items:center; height:30px; padding-inline:9px; border-radius:9px; flex:none; font-size:12.5px; font-weight:700; font-variant-numeric:tabular-nums; color:color-mix(in srgb, var(--acc) 55%, #1F2329); background:color-mix(in srgb, var(--acc) 22%, #fff)}
.tlc-chip:hover{transform:translateY(-1px); border-color:color-mix(in srgb, var(--acc) 40%, transparent)}
.tlc-chip[aria-pressed="true"]{background:color-mix(in srgb, var(--acc) 16%, #fff); border-color:color-mix(in srgb, var(--acc) 55%, transparent); box-shadow:0 8px 20px -12px color-mix(in srgb, var(--acc) 90%, transparent)}
.tlc-chip[aria-pressed="true"] .y{color:#fff; background:color-mix(in srgb, var(--acc) 85%, #3A3F5C)}
.tlc-chip.dim{opacity:.32}

.tlc-detail{--acc:var(--indigo); position:sticky; top:104px; overflow:hidden; display:flex; flex-direction:column; gap:12px; padding:32px; border-radius:30px}
.tlc-cat{display:inline-flex; align-self:flex-start; align-items:center; gap:8px; height:32px; padding-inline:12px; border-radius:999px; font-size:12px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--ink); background:rgba(255,255,255,.8)}
.tlc-cat i{width:8px; height:8px; border-radius:2px; background:var(--acc)}
[dir="rtl"] .tlc-cat{font-size:13.5px}
.tlc-yr{font-family:var(--f-display); font-size:92px; line-height:.95; letter-spacing:-.02em; color:color-mix(in srgb, var(--acc) 62%, #2B2F36); font-variant-numeric:tabular-nums}
[dir="rtl"] .tlc-yr{font-family:var(--f-ur); font-size:60px; font-weight:600; line-height:1.3}
.tlc-detail h3{font-size:24px; line-height:1.25; font-weight:650; letter-spacing:-.02em}
[dir="rtl"] .tlc-detail h3{font-family:var(--f-nq); font-size:23px; font-weight:700; line-height:1.95}
.tlc-detail p{font-size:15.5px; line-height:1.65; color:var(--ink-2)}
[dir="rtl"] .tlc-detail p{line-height:2}
.tlc-nav{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:12px; padding-top:16px; border-top:1px solid rgba(51,55,61,.1)}
.tlc-count{font-size:13px; font-weight:600; color:var(--ink-3); font-variant-numeric:tabular-nums}
.tlc-nav .arrows{display:flex; gap:8px}
.tlc-nav .ibtn.round{width:42px; height:42px}
.tlc-detail.swap > *{animation:rise .55s var(--ease) both}
.tlc-detail.swap > *:nth-child(2){animation-delay:.04s}
.tlc-detail.swap > *:nth-child(3){animation-delay:.08s}

/* ---------- Responsive ---------- */
@container site (max-width: 1180px){
  .hc-grid{grid-template-columns:minmax(0, 1fr) 72px; gap:24px}
  .hc .dot{grid-template-columns:44px; padding:8px}
  [dir="rtl"] .hc .dot{padding:8px}
  .hc .dot .n{display:none}
  .rail-c .arrows{flex-direction:column; align-items:center; padding:0}
  .hc .slide{gap:32px}
}
@container site (max-width: 1080px){
  .tlc{grid-template-columns:1fr}
  .tlc-detail{position:relative; top:0; order:-1}
}
@container site (max-width: 820px){
  .hero.hc{padding:10px 10px 0}
  .hc-frame{padding:86px 20px 22px; border-radius:30px}
  .hc-verse{display:none}
  .hc-grid{grid-template-columns:1fr; gap:16px}
  .hc .slide{grid-template-columns:1fr; gap:22px; min-height:0; align-content:start}
  .stage-c{order:-1; min-height:360px; border-radius:26px}
  .st-callig{font-size:220px}
  .seal{width:92px; height:92px; top:16px; inset-inline-start:16px}
  .seal-mark{font-size:22px; padding-top:10px}
  .st-flag{top:16px; inset-inline-start:16px}
  .st-card{bottom:16px; inset-inline-end:14px}
  .st-book .cover{width:min(180px, 46%)}
  .stage-c .fan .cover{width:min(130px, 30%)}
  .rail-c{flex-direction:row; align-items:center; justify-content:space-between; gap:12px}
  .hc .dots{flex-direction:row; gap:8px}
  .hc .dot{grid-template-columns:auto; padding:6px; transform:none}
  .hc .dot.is-active{transform:translateY(-3px)}
  .hc .dot .thumb{width:36px; height:46px; font-size:14px}
  .hc .dot .thumb .mini{width:22px}
  .hc .dot .bar{inset-block:auto -7px; inset-inline:8px; top:auto; bottom:-7px; width:auto; height:3px}
  .hc .dot .bar b{transform:scaleX(0); transform-origin:left}
  [dir="rtl"] .hc .dot .bar b{transform-origin:right}
  .hc .dot.is-active .bar b{animation-name:fill}
  .hero.hc.no-auto .dot.is-active .bar b{transform:scaleX(1)}
  .rail-c .arrows{flex-direction:row}
  .pc{grid-template-columns:1fr}
  .pc-feature{padding:30px}
  .tlc-board{padding:4px 18px}
  .tlc-row{grid-template-columns:1fr; gap:10px}
}
@container site (max-width: 560px){
  .hc .hero-name{font-size:54px}
  [dir="rtl"] .hc .hero-name{font-size:38px}
  .stage-c{min-height:320px}
  .st-card{display:none}
  .rail-c .arrows .ibtn.round{width:40px; height:40px}
  .pc-feature{padding:26px 22px; border-radius:26px}
  .pc-feature h3{font-size:24px}
  [dir="rtl"] .pc-feature h3{font-size:22px}
  .pc-yr{font-size:38px}
  .pc-row{grid-template-columns:50px minmax(0, 1fr) 18px; gap:10px; padding:13px 10px}
  .pc-row .yr{font-size:22px}
  .pc-list{border-radius:26px; padding:6px}
  .tlc-detail{padding:24px 22px; border-radius:26px}
  .tlc-yr{font-size:68px}
  [dir="rtl"] .tlc-yr{font-size:46px}
  .tlc-chip{font-size:13.5px}
  .tl-legend{flex-wrap:nowrap; overflow-x:auto; margin-inline:-16px; padding-inline:16px; scrollbar-width:none}
}