:root{
  color-scheme:light;
  --ink:#202430;
  --sub:#596170;
  --faint:#79808c;
  --line:rgba(32,36,48,.14);
  --page-bg:#f5f6f8;
  --surface:#fff;
  --surface-2:#f2f4f7;
  --surface-3:#e9edf2;
  --brand:#4b66da;
  --brand-deep:#2e43a5;
  --brand-soft:#e9edff;
  --signal:#ffbf28;
  --danger:#b53b31;
  --header-bg:rgba(255,255,255,.9);
  --dock-bg:rgba(255,255,255,.94);
  --sheet-bg:#fff;
  --sheet-ink:#202430;
  --sheet-sub:#667080;
  --hero-panel:rgba(20,28,52,.92);
  --hero-panel-ink:#fff;
  --hero-panel-sub:rgba(255,255,255,.72);
  --shadow:0 22px 55px rgba(8,18,45,.16);
  --shadow-soft:0 10px 28px rgba(8,18,45,.09);
  --ease:cubic-bezier(.22,1,.36,1);
  --green:var(--brand);
  --green-deep:var(--brand-deep);
  --green-ink:var(--brand-deep);
  --green-soft:var(--brand-soft);
  --orange:var(--signal);
  --red:var(--danger);
  --wash:var(--surface-2);
}

*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden;overflow-x:clip}
body{
  min-height:100vh;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--page-bg);line-height:1.6;
  text-rendering:optimizeLegibility;
}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit}
a{color:var(--brand-deep)}
img{max-width:100%;display:block}
.num{font-variant-numeric:tabular-nums}
.aurora{position:fixed;inset:0;z-index:-1;pointer-events:none;background:var(--page-bg)}
.page{max-width:640px;margin:0 auto;padding:0 18px calc(112px + env(safe-area-inset-bottom))}
.no-dock .page{padding-bottom:calc(42px + env(safe-area-inset-bottom))}

/* brand rail */
.top{
  position:sticky;top:0;z-index:40;margin:0 -18px;padding:10px 18px;
  padding-top:calc(10px + env(safe-area-inset-top));
  display:flex;align-items:center;gap:10px;
  color:var(--hero-panel-ink);background:var(--header-bg);
  border-bottom:1px solid var(--line);
}
.top img{height:23px;width:auto}
.top .divider{width:1px;height:17px;background:currentColor;opacity:.28}
.top .series{font-size:11.5px;font-weight:780;letter-spacing:.08em;white-space:nowrap}

/* immersive first screen */
.hero{position:relative;margin:0 -18px;color:var(--hero-panel-ink)}
.hero-media{position:relative;height:408px;overflow:hidden;background:var(--surface-3)}
.hero-media>img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:auto 0 0;height:45%;background:rgba(3,12,34,.42);pointer-events:none}
.hero-copy{position:absolute;left:22px;right:22px;top:28px;z-index:2}
.hero-eyebrow{font-size:10px;font-weight:850;letter-spacing:.22em;text-transform:uppercase;opacity:.82}
.hero h1{max-width:330px;margin-top:14px;font-size:35px;line-height:1.08;font-weight:900;letter-spacing:-.035em;text-wrap:balance}
.hero h1 .signal{color:var(--signal)}
.hero .en{margin-top:11px;font-size:10px;font-weight:760;letter-spacing:.17em;text-transform:uppercase;opacity:.72}
.hero-panel{
  position:relative;z-index:3;margin:-68px 18px 0;padding:20px 18px 18px;
  color:var(--hero-panel-ink);background:var(--hero-panel);
  border:1px solid color-mix(in srgb,var(--brand) 52%,transparent);
  border-radius:22px;box-shadow:var(--shadow);
}
.has-school .hero-panel{display:none}
.mission-line{display:flex;align-items:center;justify-content:space-between;gap:12px}
.mission-id{font-size:10px;font-weight:900;letter-spacing:.18em;text-transform:uppercase;color:var(--signal)}
.mission-state{font-size:11px;font-weight:760;color:var(--hero-panel-sub);white-space:nowrap}
.mission-title{margin-top:10px;font-size:20px;line-height:1.25;font-weight:860;letter-spacing:-.015em}
.mission-sub{margin-top:4px;color:var(--hero-panel-sub);font-size:12.5px}
.mission-stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:16px 0;background:color-mix(in srgb,var(--brand) 30%,transparent);border-radius:13px;overflow:hidden}
.mission-stat{padding:11px 12px;background:color-mix(in srgb,var(--hero-panel) 90%,#fff 10%)}
.mission-stat b{display:block;font-size:16px;line-height:1.2;color:var(--hero-panel-ink)}
.mission-stat>b span{display:inline}
.mission-stat>span{display:block;margin-top:3px;font-size:10px;color:var(--hero-panel-sub);letter-spacing:.08em}
.hero .cta{margin-top:0}
.hero .hint{margin-top:9px;text-align:center;color:var(--hero-panel-sub);font-size:11.5px}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;border:0;cursor:pointer;text-decoration:none;font-weight:800;border-radius:12px;transition:transform .2s var(--ease),opacity .2s var(--ease),box-shadow .2s var(--ease)}
.btn:active{transform:scale(.975)}
.btn:focus-visible,.chips button:focus-visible,.tl button:focus-visible,.switch-link:focus-visible,.close:focus-visible,.search-field:focus-visible{outline:3px solid color-mix(in srgb,var(--signal) 75%,#fff);outline-offset:3px}
.btn-primary{width:100%;padding:13px 18px;background:var(--signal);color:#10224a;font-size:15px;box-shadow:0 10px 22px rgba(0,0,0,.16)}
.btn-primary[aria-disabled="true"]{background:var(--surface-3);color:var(--faint);box-shadow:none;cursor:default}
.btn-ghost{padding:12px 16px;background:transparent;color:var(--brand-deep);border:1px solid color-mix(in srgb,var(--brand) 62%,transparent);font-size:14px}
.btn-block{width:100%}

.journey-nav{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:1px;margin:20px 0 0;background:var(--line);border:1px solid var(--line);border-radius:15px;overflow:hidden}
.journey-nav a{min-width:0;padding:12px 5px;text-align:center;text-decoration:none;background:var(--surface);color:var(--sub);font-size:11px;font-weight:800;letter-spacing:.04em}
.journey-nav a:active{background:var(--brand-soft);color:var(--brand-deep)}

/* chapters */
section{position:relative;margin-top:58px;scroll-margin-top:76px}
.sec-head{display:grid;grid-template-columns:auto 1fr;align-items:end;gap:13px;margin-bottom:18px;text-align:left;scroll-margin-top:58px}
.sec-index{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--surface);font-size:12px;font-weight:900;color:var(--brand-deep)}
.sec-head .zh{font-size:24px;line-height:1.15;font-weight:900;letter-spacing:-.025em}
.sec-head .en{margin-top:4px;font-size:9.5px;letter-spacing:.19em;color:var(--faint);text-transform:uppercase;font-weight:760}
.chapter-lede{margin:-8px 0 18px;color:var(--sub);font-size:13px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-soft);padding:20px}

/* current checkpoint */
#mySession{margin-top:30px;padding-top:30px}
#mySession::before{content:"";position:absolute;top:0;left:22px;width:1px;height:28px;background:var(--brand)}
#sessionCard{position:relative;overflow:hidden;border-color:color-mix(in srgb,var(--brand) 54%,var(--line));box-shadow:var(--shadow)}
#sessionCard::before{content:"CHECKPOINT";display:block;margin-bottom:12px;font-size:9px;font-weight:900;letter-spacing:.2em;color:var(--brand-deep)}
#sessionCard .school-zh{font-size:22px;font-weight:900;line-height:1.25;letter-spacing:-.02em}
#sessionCard .school-en{font-size:11px;color:var(--faint);letter-spacing:.08em;margin-top:3px}
.status{display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;font-size:11px;font-weight:800;border-radius:999px;padding:4px 9px;white-space:nowrap}
.status::before{content:"";width:6px;height:6px;border-radius:99px;background:currentColor}
.st-upcoming{color:#16643d;background:#dff5e8}
.st-today{color:#8a4b00;background:#fff0d7}
.st-past{color:#68707b;background:#edf0f3}
.st-full,.st-closed{color:#922f28;background:#f9e7e5}
.st-tbd{color:#555d69;background:#eef0f4}
.meta-rows{margin-top:16px;display:grid;border-top:1px solid var(--line)}
.meta-row{display:grid;grid-template-columns:48px 1fr;gap:11px;padding:11px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.meta-row .ic{font-size:10px;font-weight:900;letter-spacing:.08em;color:var(--brand-deep)}
.meta-row .muted{color:var(--faint)}
.session-actions{display:grid;grid-template-columns:1.25fr 1fr;gap:9px;margin-top:18px}
.session-actions.is-single{grid-template-columns:1fr}
.session-actions .btn{width:100%;padding:10px 7px;font-size:13px}
.switch-link{display:block;margin:13px auto 0;padding:5px;border:0;background:none;color:var(--sub);font-size:12px;font-weight:700;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.fmt-badge{display:inline-block;margin-left:7px;padding:2px 7px;vertical-align:3px;border-radius:5px;background:var(--brand-soft);color:var(--brand-deep);font-size:10px;font-weight:800}
.note-box{margin-top:12px;padding:11px 12px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--sub);font-size:12.5px;white-space:pre-wrap;word-break:break-word}
.signup-tip{margin-top:10px;padding:9px 10px;text-align:center;border-radius:10px;background:var(--brand-soft);color:var(--brand-deep);font-size:11.5px;font-weight:700}
.channel-status{margin-top:16px;padding:11px 12px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--sub);font-size:12px;font-weight:700;text-align:center}

/* school picker */
.picker-search,.job-search{display:block;margin:14px 0 12px}
.search-field{width:100%;min-height:46px;padding:11px 14px;border:1px solid rgba(32,36,48,.18);border-radius:12px;background:#fff;color:#202430;font:inherit;font-size:16px;box-shadow:none;-webkit-appearance:none;appearance:none}
.search-field::placeholder{color:#818a96}
.search-empty{padding:20px 12px;text-align:center;color:var(--sheet-sub);font-size:12.5px}
.tl{list-style:none;display:grid;grid-template-columns:minmax(0,1fr);gap:8px}
.tl button{width:100%;display:flex;align-items:center;gap:12px;text-align:left;cursor:pointer;background:#fff;border:1px solid rgba(32,36,48,.14);border-radius:14px;padding:12px 13px;color:#202430;transition:border-color .2s,box-shadow .2s}
.tl button[aria-current="true"]{border-color:var(--brand);box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 18%,transparent)}
.tl .d{flex:0 0 48px;text-align:center;font-weight:900;font-size:13px;color:var(--brand-deep);line-height:1.2}
.tl .d small{display:block;font-weight:650;font-size:9.5px;color:#77808c}
.tl .s{flex:1;min-width:0}
.tl .s .n{display:block;font-weight:820;font-size:13px;line-height:1.35;white-space:normal;overflow-wrap:anywhere}
.tl .s .c{display:block;margin-top:2px;font-size:10.5px;line-height:1.35;color:#77808c;white-space:normal;overflow-wrap:anywhere}
.tl .status{font-size:9.5px;padding:3px 7px}

/* company story */
.prose{font-size:14px;color:var(--sub)}
.prose p+p{margin-top:11px}
.prose b{color:var(--ink)}
.honors,.products{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.honors span,.products span{padding:5px 9px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);color:var(--brand-deep);font-size:10.5px;font-weight:760}
.trust-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:17px}
.trust-item{min-height:92px;padding:13px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}
.trust-item .v{font-size:18px;line-height:1.15;font-weight:900;color:var(--brand-deep)}
.trust-item .d{margin-top:7px;font-size:10.5px;line-height:1.45;color:var(--sub)}
.company-more{margin-top:15px;padding-top:13px;border-top:1px solid var(--line)}
.company-more summary{cursor:pointer;color:var(--brand-deep);font-size:12.5px;font-weight:850;list-style-position:inside}
.company-more[open] summary{margin-bottom:12px}
.growth{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.growth-item{padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow-soft)}
.growth-item .k{font-size:9px;font-weight:900;letter-spacing:.11em;color:var(--brand-deep)}
.growth-item .t{margin-top:5px;font-size:14px;font-weight:880}
.growth-item .d{margin-top:5px;font-size:11.5px;line-height:1.55;color:var(--sub)}
.program-note,.jobs-hint{margin:-8px 0 14px;color:var(--faint);font-size:11.5px}
.eligibility{margin-top:10px}
.eligibility .eyebrow{font-size:9px;font-weight:900;letter-spacing:.16em;color:var(--brand-deep)}
.eligibility h3{margin-top:6px;font-size:18px;line-height:1.35}
.eligibility ul{margin:11px 0 0 18px;color:var(--sub);font-size:12.5px}
.eligibility li+li{margin-top:5px}
.adv{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:16px;background:var(--line);border:1px solid var(--line);border-radius:15px;overflow:hidden}
.adv li{list-style:none;padding:14px;background:var(--surface)}
.adv .t{font-weight:850;font-size:13px}
.adv .d{margin-top:4px;font-size:11px;color:var(--sub)}
.aud{margin-top:1px;padding:12px 14px;text-align:left;background:var(--brand-soft);color:var(--sub);font-size:12.5px}
.aud b{color:var(--brand-deep)}

/* jobs */
.jobcat{padding:0;border-bottom:1px solid var(--line)}
.jobcat:first-child{margin-top:-5px}
.jobcat:last-child{border-bottom:0}
.jobcat summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 0;cursor:pointer;color:var(--brand-deep);font-size:12px;font-weight:900;letter-spacing:.05em;list-style-position:inside}
.jobcat summary b{font-size:10px;color:var(--faint);white-space:nowrap}
.job-summary-meta{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.job-summary-meta i{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;color:var(--brand-deep);transform:rotate(45deg);transition:transform .2s ease}
.jobcat[open] .job-summary-meta i{transform:rotate(225deg)}
.jobcat[open] summary{padding-bottom:11px}
.jobcat .chips{padding-bottom:15px}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chips button{min-height:44px;padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:var(--surface-2);color:var(--ink);font-size:11.5px;font-weight:700;cursor:pointer;transition:border-color .2s,background .2s}
.chips button:active{border-color:var(--brand);background:var(--brand-soft)}
.jobs-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);color:var(--faint);font-size:11.5px}
.jobs-note b{color:var(--brand-deep)}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;margin-top:18px}
.flow .step{position:relative;text-align:left}
.flow .dot{width:26px;height:26px;display:flex;align-items:center;justify-content:center;border:1px solid var(--brand);border-radius:8px;background:var(--brand-soft);color:var(--brand-deep);font-size:10px;font-weight:900}
.flow .t{margin-top:6px;font-size:9.5px;font-weight:800;line-height:1.3}
.flow .d{margin-top:3px;font-size:8.5px;color:var(--faint);line-height:1.35}

/* participation route */
.howto{display:grid;gap:1px;border:1px solid var(--line);border-radius:17px;overflow:hidden;background:var(--line)}
.howto .step{display:grid;grid-template-columns:39px 1fr;gap:13px;align-items:start;padding:16px;background:var(--surface)}
.howto .n{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border:1px solid var(--brand);border-radius:10px;background:var(--brand-soft);color:var(--brand-deep);font-weight:900;font-size:12px}
.howto .t{font-weight:850;font-size:14px}
.howto .d{margin-top:3px;font-size:12px;color:var(--sub)}
.howto .d b{color:var(--brand-deep)}

/* job detail */
.job-detail h2{padding-right:52px;font-size:19px;font-weight:850;text-align:left;color:var(--sheet-ink)}
.job-tags{display:flex;flex-wrap:wrap;gap:6px;margin:9px 0 2px}
.job-tags span{padding:3px 8px;border-radius:6px;background:var(--brand-soft);color:var(--brand-deep);font-size:10.5px;font-weight:760}
.job-detail .blk{margin-top:15px}
.job-detail .blk h4{margin-bottom:4px;font-size:12px;font-weight:850;color:var(--brand-deep)}
.job-detail .blk p{font-size:13px;color:var(--sheet-sub);white-space:pre-wrap;word-break:break-word}
.job-detail #jobSheetBody{padding-bottom:108px}
.job-detail .cta{position:sticky;bottom:0;margin:16px -18px calc(-24px - env(safe-area-inset-bottom));padding:12px 18px calc(16px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);border-top:1px solid rgba(32,36,48,.12)}

footer{margin:58px -18px -1px;padding:28px 18px 22px;border-top:1px solid var(--line);text-align:center;color:var(--faint);font-size:11px;background:var(--surface)}
footer img{height:19px;width:auto;margin:0 auto 9px;opacity:.9}
footer .upd{margin-top:6px}

/* persistent conversion */
.dock{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px 15px calc(10px + env(safe-area-inset-bottom));background:var(--dock-bg);border-top:1px solid var(--line)}
.dock-in{max-width:640px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr;gap:9px}
.dock-in.is-single{grid-template-columns:1fr}
.dock .btn{min-height:44px;padding:10px 8px;font-size:13px;white-space:nowrap}
.dock .btn-ghost{background:var(--surface)}

/* sheets */
.modal{position:fixed;inset:0;z-index:60;display:none}
.modal.open{display:block}
.modal .mask{position:absolute;inset:0;background:rgba(8,12,22,.66)}
.sheet{position:absolute;left:0;right:0;bottom:0;max-height:86vh;max-height:86dvh;overflow:auto;overscroll-behavior:contain;background:var(--sheet-bg);color:var(--sheet-ink);border-radius:24px 24px 0 0;box-shadow:0 -12px 44px rgba(8,12,22,.28);padding:18px 18px calc(24px + env(safe-area-inset-bottom))}
.sheet-in{max-width:640px;margin:0 auto}
.sheet h2{margin-bottom:4px;font-size:18px;font-weight:850;text-align:center}
.sheet .sub{margin-bottom:15px;color:var(--sheet-sub);font-size:11.5px;text-align:center}
.sheet .close{position:sticky;top:0;float:right;min-width:48px;height:40px;padding:0 12px;border:0;border-radius:999px;background:#eef0f4;color:#4d5663;font-size:12px;font-weight:800;cursor:pointer;z-index:2}
.lightbox{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px}
.lightbox img{width:min(78vw,320px);height:auto;padding:10px;border-radius:16px;background:#fff}
.lightbox p{max-width:330px;margin-top:14px;padding:12px 16px;border:1px solid rgba(255,255,255,.25);border-radius:13px;background:rgba(8,12,22,.82);color:#fff;font-size:13px;font-weight:700;text-align:center}

@media (max-width:360px){
  .page{padding-left:14px;padding-right:14px}
  .top,.hero,footer{margin-left:-14px;margin-right:-14px}
  .hero-copy{left:18px;right:18px}
  .hero h1{font-size:31px}
  .hero-panel{margin-left:14px;margin-right:14px}
  .session-actions,.growth,.trust-grid,.adv{grid-template-columns:1fr}
  .dock-in{grid-template-columns:1.5fr 1fr}
  .dock .btn{font-size:12px}
}

@media (max-width:400px){
  .top .divider,.top .series{display:none}
}

/* 200% 文字缩放下保留主任务,不用水平裁切掩盖内容溢出 */
@media (max-width:260px){
  .top{justify-content:center}
  .top .divider,.top .series{display:none}
  .mission-line{align-items:flex-start;flex-direction:column;gap:4px}
  .journey-nav{grid-auto-flow:row;grid-template-columns:1fr}
  .tl button{align-items:flex-start;flex-wrap:wrap;gap:9px}
  .tl .d{flex-basis:40px}
  .tl .s{flex:1 1 calc(100% - 49px)}
  .tl .status{margin-left:49px}
  .meta-row{grid-template-columns:40px 1fr;gap:8px}
}

@media (min-width:641px){
  .hero{border-radius:0 0 28px 28px;overflow:hidden}
}