/* 選擇中文：品牌字標、選項圖形與首頁主視覺。只修改品牌層，不干擾題庫及學習紀錄。 */
:root{--brand-forest:#17483e;--brand-teal:#0b8a73;--brand-gold:#f7b95e;--brand-cream:#fff8e9}
.site-header{background:rgba(250,252,248,.94);border-bottom:1px solid #e3ece6}
.header-inner{min-height:86px}
.brand{gap:12px;flex-shrink:0}
.brand .brand-mark{width:48px;height:48px;min-width:48px;background:transparent;box-shadow:none;transform:none;border-radius:0;display:block}
.brand-mark svg{display:block;width:100%;height:100%;filter:drop-shadow(0 6px 10px rgba(12,99,83,.14))}
.brand .brand-name{display:flex;align-items:center;gap:.06em;line-height:1.13;font-size:27px;letter-spacing:-.065em;font-weight:900}
.brand-word{color:#243c37}
.brand-word-em{color:var(--brand-teal)}
.brand .brand-sub{margin-top:5px;color:#899f96;font-size:10px;font-weight:700;letter-spacing:.045em}
.nav-link.is-active{color:#126d5b;background:#e5f3eb}
.nav-link:hover{background:#eaf7ef;color:#126d5b}
.hero{grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);min-height:434px;padding:54px 64px;background:radial-gradient(circle at 79% 22%,rgba(255,255,255,.76) 0,rgba(255,255,255,0) 35%),linear-gradient(116deg,#e5f7eb 0%,#eef9ee 54%,#dcefe3 100%);border:1px solid #d5eadf;border-radius:30px}
.hero:after{background:#fff4d9;opacity:.31}
.hero-copy{min-width:0}
.hero .eyebrow{margin-bottom:18px;color:#4f8b77;letter-spacing:.055em}
.hero .sun-dot{background:#f2b956;box-shadow:0 0 0 4px #fffae9}
.hero .hero-title{display:flex;align-items:baseline;flex-wrap:nowrap;white-space:nowrap;gap:.045em;font-weight:900;font-size:clamp(50px,5.7vw,75px);letter-spacing:-.10em;line-height:1.25;margin:0 0 12px}
.hero .hero-title .hero-title-first{color:var(--brand-forest)}
.hero .hero-title .hero-title-second{position:relative;color:var(--brand-teal)}
.hero-title-check{position:absolute;display:grid;place-items:center;right:-.62em;top:-.45em;width:1.45em;height:1.45em;font-size:.25em;letter-spacing:0;color:#6b501a!important;border:2px solid #fff7e4;border-radius:50%;background:#ffd37d;transform:rotate(12deg);box-shadow:0 4px 13px #a5b88b48}
.hero .hero-tagline{color:#2e675a;font-size:24px;font-weight:800;line-height:1.55;letter-spacing:-.035em;margin-bottom:9px}
.hero .hero-description{color:#5f8275;font-size:14px;line-height:1.93;max-width:460px}
.hero-actions{margin-top:25px}
.hero-actions .btn-primary{background:#0f846d}
.hero-actions .btn-primary:hover{background:#0c6c5c}
.hero .hero-mini{margin-top:21px}
.hero-art{height:327px;isolation:isolate}
.choice-art-ring{border:1.6px dashed #b3dfcb;border-radius:50%;position:absolute;pointer-events:none}
.choice-art-ring-one{width:320px;height:320px;right:-18px;top:4px}
.choice-art-ring-two{width:255px;height:255px;right:17px;top:32px;border:2px solid rgba(255,255,255,.63)}
.choice-board{position:relative;z-index:2;width:min(300px,100%);border:1px solid #e6efe8;background:rgba(255,255,255,.96);padding:23px 22px 20px;border-radius:22px;box-shadow:13px 16px 0 rgba(147,202,178,.35),0 25px 35px rgba(34,107,84,.16);transform:rotate(5deg)}
.choice-board-top{display:flex;align-items:center;justify-content:space-between;color:#9bad9f;font-size:9px;font-weight:900;letter-spacing:.11em}
.choice-board-top span:last-child{background:#eef8f1;padding:4px 7px;border-radius:9px;color:#238b73;font-size:10px}
.choice-board-title{font-size:19px;font-weight:900;line-height:1.55;margin:11px 0 15px;color:#294b40}
.choice-board-title span{display:block;color:#178f73}
.choice-board-option{border:1px solid #e6efe9;min-height:35px;border-radius:10px;background:#fff;display:flex;gap:10px;align-items:center;padding:6px 10px;color:#64857a;font-size:11px;font-weight:800;margin-top:7px}
.choice-board-option b{width:22px;height:22px;flex-shrink:0;border-radius:7px;background:#eef5f0;display:grid;place-items:center;color:#85a69a;font-size:11px}
.choice-board-option.is-picked{background:#e9f8ed;border-color:#8bd5ae;color:#187a61}
.choice-board-option.is-picked b{background:#238d73;color:white}
.choice-picked-icon{margin-left:auto;color:#278968;font-size:18px}
.choice-art-spark{position:absolute;z-index:3;pointer-events:none;color:#deb05a}
.choice-art-spark-one{font-size:33px;top:-13px;right:15px}
.choice-art-spark-two{font-size:22px;bottom:8px;left:4px;color:#78baa4}
.choice-art-sticker{position:absolute;z-index:4;bottom:24px;right:-15px;transform:rotate(-9deg);padding:9px 13px;background:#ffe7ab;color:#8a641f;font-size:12px;font-weight:900;border-radius:13px;box-shadow:0 7px 17px #967b5426}
.site-footer .footer-brand{font-size:16px;color:#27483d;font-weight:900;letter-spacing:-.055em}
.site-footer .footer-brand>span{color:var(--brand-teal)}
.site-footer .footer-brand small{letter-spacing:.04em;color:#9aaba4;font-weight:700}
@media(max-width:900px){
  .hero{padding:42px 42px;min-height:380px}
  .hero .hero-title{font-size:clamp(47px,6vw,62px)}
  .hero .hero-tagline{font-size:20px}
  .choice-board{width:255px;padding:19px}
  .choice-board-title{font-size:17px}
  .choice-art-ring-one{width:276px;height:276px;right:0;top:20px}
  .choice-art-ring-two{width:220px;height:220px;right:25px;top:45px}
}
@media(max-width:620px){
  .header-inner{min-height:68px}
  .brand{gap:7px}
  .brand .brand-mark{width:38px;height:38px;min-width:38px}
  .brand .brand-name{font-size:21px}
  .brand .brand-sub{font-size:8px;margin-top:3px}
  .hero{padding:36px 27px 29px;min-height:auto;border-radius:23px}
  .hero .eyebrow{margin-bottom:11px;font-size:11px}
  .hero .hero-title{font-size:clamp(42px,10vw,58px);letter-spacing:-.10em;line-height:1.3;margin-bottom:8px}
  .hero .hero-tagline{font-size:19px;margin-bottom:6px}
  .hero .hero-description{font-size:13px;line-height:1.87}
  .hero .hero-art{display:none}
  .hero .hero-mini{margin-top:18px}
  .hero .hero-actions{margin-top:23px}
  .site-footer .footer-brand{font-size:13px}
}
@media(max-width:440px){
  .nav-link{min-width:34px;padding:9px 7px;justify-content:center}
  .nav-link > span:not(.nav-icon):not(.nav-count){display:none}
  .nav-link .nav-icon{font-size:19px}
  .brand .brand-name{font-size:22px}
  .brand .brand-sub{font-size:8px}
}
@media(max-width:370px){
  .hero .hero-title{font-size:41px}
  .hero .hero-tagline{font-size:17px}
  .hero{padding-left:20px;padding-right:20px}
  .brand .brand-name{font-size:20px}
}