:root{
  --bg:#ffffff; --bg-alt:#f4f7fc; --surface:#ffffff; --surface-2:#eef3fb;
  --line:rgba(20,40,80,.10); --text:#16203a; --muted:#5c6a86;
  --primary:#2563eb; --primary-2:#0ea5e9; --accent:#8b5cf6;
  --grad:linear-gradient(120deg,#2563eb 0%,#0ea5e9 50%,#8b5cf6 100%);
  --radius:18px; --shadow:0 18px 50px rgba(30,50,90,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans TC",system-ui,sans-serif;background:var(--bg);color:var(--text);
  line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;min-height:100vh;
  display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
main{flex:1}

/* ---------- 導覽列 ---------- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.7);
  backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:.3s}
.navbar.scrolled{background:rgba(255,255,255,.92);border-bottom-color:var(--line);
  box-shadow:0 4px 20px rgba(30,50,90,.06)}
.nav-inner{max-width:1200px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;
  justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;color:var(--text)}
.logo-mark{font-family:"Orbitron",sans-serif;font-weight:900;font-size:18px;width:42px;height:42px;
  display:grid;place-items:center;border-radius:12px;background:var(--grad);color:#fff;
  box-shadow:0 6px 18px rgba(37,99,235,.35)}
.logo-text{font-size:16px;letter-spacing:.5px;white-space:nowrap}
.nav-links{display:flex;gap:6px}
.nav-link{padding:8px 16px;border-radius:999px;font-size:15px;color:var(--muted);transition:.25s;font-weight:500}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--primary);background:rgba(37,99,235,.10)}
.nav-cta{padding:8px 18px;border-radius:999px;background:var(--grad);color:#fff;font-weight:700;font-size:15px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ---------- Hero（首頁）---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:120px 24px 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:linear-gradient(180deg,rgba(6,18,46,.30),rgba(6,18,46,.62)),
    url('../img/hero-bg.jpg') center center/cover no-repeat}
.hero-content{position:relative;z-index:1;max-width:980px;animation:rise .9s ease both}
.hero-eyebrow{font-family:"Orbitron",sans-serif;letter-spacing:3px;font-size:13px;color:#8fd3ff;
  margin-bottom:22px;text-transform:uppercase}
.hero-title{font-size:clamp(24px,6.2vw,74px);font-weight:900;line-height:1.1;letter-spacing:1px;
  white-space:nowrap;color:#fff;text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero-sub{margin:26px auto 38px;color:rgba(255,255,255,.9);font-size:clamp(15px,2.2vw,19px);max-width:640px;
  text-shadow:0 1px 12px rgba(0,0,0,.3)}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.45);backdrop-filter:blur(4px)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.24)}
.hero-stats{margin-top:64px;display:flex;gap:48px;justify-content:center;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;gap:4px}
.stat-num{font-family:"Orbitron",sans-serif;font-size:30px;font-weight:700;color:#fff}
.stat-label{font-size:13px;color:rgba(255,255,255,.8);letter-spacing:1px}

/* ---------- 子頁頁首 ---------- */
.page-hero{position:relative;padding:160px 24px 70px;text-align:center;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(70% 80% at 50% 0%,rgba(37,99,235,.12),transparent 70%),var(--bg-alt)}
.page-hero-inner{position:relative;z-index:1;max-width:760px;margin:0 auto}
.page-hero .section-tag{margin-bottom:16px}
.page-hero h1{font-size:clamp(30px,5vw,50px);font-weight:900}
.page-hero p{color:var(--muted);margin-top:14px;font-size:17px}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:14px 30px;border-radius:999px;font-weight:700;font-size:15px;
  cursor:pointer;border:0;transition:.25s;letter-spacing:.5px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(37,99,235,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(37,99,235,.45)}
.btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--surface-2);transform:translateY(-3px)}
.btn-block{width:100%;margin-top:10px}
.btn-sm{padding:8px 18px;font-size:14px}

/* ---------- Sections ---------- */
.section{padding:90px 24px}
.section-alt{background:var(--bg-alt)}
.container{max-width:1200px;margin:0 auto}
.container-narrow{max-width:760px}
.section-head{text-align:center;margin-bottom:56px}
.section-tag{font-family:"Orbitron",sans-serif;letter-spacing:3px;font-size:12px;color:var(--primary);
  border:1px solid rgba(37,99,235,.30);padding:5px 14px;border-radius:999px;display:inline-block}
.section-title{font-size:clamp(28px,4.5vw,42px);font-weight:900;margin:18px 0 12px}
.section-desc{color:var(--muted);max-width:560px;margin:0 auto;font-size:16px}
.subhead{font-size:24px;font-weight:700;margin:64px 0 28px;text-align:center;position:relative}
.subhead::after{content:"";display:block;width:54px;height:3px;background:var(--grad);border-radius:2px;margin:14px auto 0}

/* 首頁特色區 */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;transition:.3s;box-shadow:0 6px 22px rgba(30,50,90,.05)}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(14,165,233,.4);box-shadow:var(--shadow)}
.feature-card .ico{font-size:38px;margin-bottom:16px}
.feature-card h3{font-size:20px;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:15px}
.home-cta{text-align:center;background:linear-gradient(160deg,#eaf1fd,#f4f7fc);
  border:1px solid var(--line);border-radius:var(--radius);padding:60px 30px;margin-top:10px}
.home-cta h2{font-size:clamp(24px,4vw,34px);font-weight:900;margin-bottom:14px}
.home-cta p{color:var(--muted);margin-bottom:28px}

/* ---------- News ---------- */
.news-list{display:flex;flex-direction:column;gap:18px}
.news-card{display:flex;gap:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 30px;transition:.3s;align-items:flex-start;
  box-shadow:0 6px 22px rgba(30,50,90,.05)}
.news-card:hover{transform:translateX(8px);border-color:rgba(37,99,235,.45);background:var(--surface-2)}
.news-date{text-align:center;flex-shrink:0;min-width:72px}
.news-date .d{font-family:"Orbitron",sans-serif;font-size:34px;font-weight:700;display:block;color:var(--primary)}
.news-date .m{font-size:12px;color:var(--muted);letter-spacing:1px}
.news-body h3{font-size:19px;margin:8px 0 6px}
.news-body p{color:var(--muted);font-size:15px;white-space:pre-wrap}
.news-badge{font-size:12px;padding:3px 12px;border-radius:999px;background:rgba(20,40,80,.07);
  color:var(--muted);font-weight:500}
.badge-hot,.news-badge.最新{background:rgba(139,92,246,.14);color:#7c3aed}

/* ---------- Rules ---------- */
.rules-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rule-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;transition:.3s;box-shadow:0 6px 22px rgba(30,50,90,.05)}
.rule-card:hover{transform:translateY(-6px);border-color:rgba(14,165,233,.4);box-shadow:var(--shadow)}
.rule-icon{font-size:38px;margin-bottom:16px}
.rule-card h3{font-size:21px;margin-bottom:12px}
.rule-card p{color:var(--muted);font-size:15px}
.track-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.track-card{position:relative;background:linear-gradient(160deg,#fff,#f4f7fc);
  border:1px solid var(--line);border-radius:var(--radius);padding:40px 30px 32px;overflow:hidden;transition:.3s;
  box-shadow:0 6px 22px rgba(30,50,90,.05)}
.track-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--grad)}
.track-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.track-no{font-family:"Orbitron",sans-serif;font-size:48px;font-weight:900;color:rgba(37,99,235,.10);
  position:absolute;top:14px;right:22px}
.track-card h4{font-size:22px;margin-bottom:12px}
.track-card p{color:var(--muted);font-size:15px}
.timeline{max-width:760px;margin:0 auto;position:relative;padding-left:8px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--primary),var(--accent))}
.tl-item{position:relative;padding:0 0 36px 40px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:0;top:4px;width:16px;height:16px;border-radius:50%;background:#fff;
  border:3px solid var(--primary-2);box-shadow:0 0 0 4px rgba(14,165,233,.15)}
.tl-date{font-family:"Orbitron",sans-serif;font-size:13px;color:var(--primary);letter-spacing:1px}
.tl-content h4{font-size:19px;margin:4px 0 4px}
.tl-content p{color:var(--muted);font-size:15px}
.score-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.score-item{text-align:center;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:32px 20px;transition:.3s;box-shadow:0 6px 22px rgba(30,50,90,.05)}
.score-item:hover{border-color:rgba(139,92,246,.4);transform:translateY(-4px)}
.score-pct{font-family:"Orbitron",sans-serif;font-size:40px;font-weight:900;display:block;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.score-item h4{font-size:17px;margin:10px 0 4px}
.score-item p{color:var(--muted);font-size:13px}

/* ---------- Form ---------- */
.reg-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:42px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:14px;margin-bottom:8px;font-weight:500}
.form-group label span{color:var(--accent)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:13px 16px;background:#fff;
  border:1px solid var(--line);border-radius:12px;color:var(--text);font-size:15px;font-family:inherit;transition:.2s}
.form-group input::placeholder,.form-group textarea::placeholder{color:#9aa6bd}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;
  border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.form-group textarea{resize:vertical}
.checkbox{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--muted);margin:8px 0 4px;cursor:pointer}
.checkbox input{width:18px;height:18px;margin-top:3px;accent-color:var(--primary)}
.checkbox a{color:var(--primary);text-decoration:underline}
.form-note{margin-top:16px;text-align:center;font-size:15px;font-weight:500;min-height:22px}
.form-note.ok{color:#16a34a}
.form-note.err{color:#dc2626}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.contact-card{text-align:center;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:38px 24px;transition:.3s;box-shadow:0 6px 22px rgba(30,50,90,.05)}
.contact-card:hover{transform:translateY(-6px);border-color:rgba(37,99,235,.4);box-shadow:var(--shadow)}
.contact-icon{font-size:38px;margin-bottom:16px}
.contact-card h4{font-size:18px;margin-bottom:10px}
.contact-card p{color:var(--muted);font-size:15px}
.contact-card a{color:var(--primary);transition:.2s}
.contact-card a:hover{color:var(--accent)}
.map-wrap{margin-top:40px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);height:340px}
.map-wrap iframe{width:100%;height:100%;border:0}

/* ---------- Footer ---------- */
.footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:48px 24px}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:16px}
.footer-nav{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}
.footer-nav a{color:var(--muted);font-size:15px;transition:.2s}
.footer-nav a:hover{color:var(--primary)}
.footer-copy{color:var(--muted);font-size:13px}

/* ---------- Animations ---------- */
@keyframes rise{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(36px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.show{opacity:1;transform:translateY(0)}
.loading{text-align:center;color:var(--muted);padding:40px}

/* ---------- 響應式 ---------- */
@media(max-width:900px){
  .rules-grid,.track-grid,.score-grid,.contact-grid,.feature-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .logo-text{font-size:14px}
  .nav-links{position:fixed;top:71px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(255,255,255,.98);backdrop-filter:blur(14px);padding:10px 24px 24px;
    border-bottom:1px solid var(--line);box-shadow:0 10px 30px rgba(30,50,90,.08);
    transform:translateY(-130%);transition:.35s;pointer-events:none}
  .nav-links.open{transform:translateY(0);pointer-events:auto}
  .nav-link,.nav-cta{padding:14px 8px;border-radius:0;border-bottom:1px solid var(--line);font-size:16px;
    background:none;color:var(--muted);box-shadow:none;text-align:left}
  .nav-link.active,.nav-cta{color:var(--primary)}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .section{padding:64px 20px}
  .hero-stats{gap:30px}
  .news-card{flex-direction:column;gap:12px}
  .news-card:hover{transform:none}
  .news-date{display:flex;align-items:baseline;gap:10px;text-align:left}
  .news-date .d{font-size:26px}
  .rules-grid,.track-grid,.score-grid,.contact-grid,.feature-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr;gap:0}
  .reg-form{padding:28px 20px}
}