/* ACEpresso 共享样式 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Helvetica Neue',Arial,'PingFang SC','Noto Sans SC',sans-serif;
  background:#F5F0EB;
  color:#1A1A1A;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:#1A1A1A;text-decoration:none}

/* NAV */
.nav{
  background:rgba(245,240,235,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid #D8D2CB;
  padding:0 8vw;
  height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:sticky;
  top:0;
  z-index:100;
}
.nav-brand{display:flex;align-items:baseline;gap:12px;cursor:pointer}
.nav-logo{font-size:14px;font-weight:800;letter-spacing:3px;text-transform:uppercase}
.nav-sub{font-size:11px;color:#999;letter-spacing:1px}
.nav-links{display:flex;gap:20px;align-items:center}
.nav-links a{font-size:12px;font-weight:500;letter-spacing:1px;color:#666;transition:color .2s}
.nav-links a:hover{color:#1A1A1A}
.nav-links a.active{color:#1A1A1A;font-weight:700}

/* HERO */
.ch-hero{
  padding:80px 8vw 60px;
  border-bottom:1px solid #D8D2CB;
}
.ch-badge{
  display:inline-block;
  font-size:11px;font-weight:700;letter-spacing:3px;text-transform:uppercase;
  color:#888;
  border:1px solid #D8D2CB;
  padding:5px 14px;
  border-radius:20px;
  margin-bottom:24px;
}
.ch-num{
  font-size:clamp(64px,12vw,140px);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:.9;
  color:#D8D2CB;
  margin-bottom:8px;
}
.ch-title{
  font-size:clamp(28px,4vw,48px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.15;
  margin-bottom:8px;
  max-width:700px;
}
.ch-title-en{
  font-size:clamp(14px,1.6vw,18px);
  font-weight:400;
  color:#888;
  margin-bottom:24px;
}
.ch-desc{
  font-size:clamp(15px,1.6vw,17px);
  font-weight:300;
  line-height:1.8;
  color:#555;
  max-width:600px;
}

/* TABS */
.tabs{
  display:flex;
  gap:0;
  border-bottom:2px solid #D8D2CB;
  padding:0 8vw;
  position:sticky;
  top:56px;
  z-index:90;
  background:rgba(245,240,235,.95);
  backdrop-filter:blur(12px);
}
.tab-btn{
  padding:16px 24px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.5px;
  color:#999;
  border:none;
  background:none;
  cursor:pointer;
  border-bottom:2px solid transparent;
  margin-bottom:-2px;
  transition:all .2s;
}
.tab-btn:hover{color:#1A1A1A}
.tab-btn.active{color:#1A1A1A;border-bottom-color:#1A1A1A}

/* SECTIONS */
.section{
  padding:60px 8vw;
  border-bottom:1px solid #D8D2CB;
  display:none;
}
.section.active{display:block}
.section-label{
  font-size:11px;font-weight:700;letter-spacing:3px;text-transform:uppercase;color:#999;margin-bottom:8px;
}
.section-title{
  font-size:clamp(22px,3vw,32px);
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:32px;
}

/* LECTURE */
.lecture-block{max-width:780px}
.lecture-block img{max-width:480px!important;height:auto;border-radius:8px;margin:16px 0}
.lecture-block h3{
  font-size:20px;font-weight:700;margin:40px 0 16px;
  padding-bottom:8px;
  border-bottom:1px solid #E8E2DC;
}
.lecture-block h4{
  font-size:16px;font-weight:700;margin:28px 0 12px;color:#333;
}
.lecture-block p{
  font-size:15px;font-weight:300;line-height:1.85;color:#333;margin-bottom:14px;
}
.lecture-block ul,.lecture-block ol{
  margin:12px 0 16px 20px;font-size:15px;line-height:1.8;color:#333;
}
.lecture-block li{margin-bottom:6px}
.lecture-block strong{font-weight:600;color:#1A1A1A}
.lecture-block blockquote{
  border-left:3px solid #D8D2CB;
  padding:12px 20px;
  margin:16px 0;
  font-size:14px;
  color:#666;
  background:rgba(0,0,0,.02);
  border-radius:0 6px 6px 0;
}

/* TABLE */
.data-table{
  width:100%;
  border-collapse:collapse;
  margin:16px 0 24px;
  font-size:14px;
}
.data-table th{
  background:#1A1A1A;
  color:#F5F0EB;
  padding:10px 14px;
  text-align:left;
  font-weight:600;
  font-size:12px;
  letter-spacing:.5px;
  text-transform:uppercase;
}
.data-table td{
  padding:10px 14px;
  border-bottom:1px solid #E8E2DC;
  vertical-align:top;
  line-height:1.6;
}
.data-table tr:hover td{background:rgba(0,0,0,.02)}

/* MEMORY TIP */
.memory-tip{
  background:linear-gradient(135deg,#FFF8E8,#FFF3D6);
  border:1px solid #F0D68A;
  border-radius:10px;
  padding:16px 20px;
  margin:16px 0;
  font-size:14px;
  line-height:1.7;
}
.memory-tip-label{
  font-size:11px;font-weight:700;letter-spacing:1px;color:#B8860B;margin-bottom:6px;text-transform:uppercase;
}

/* COACH TIP */
.coach-tip{
  background:linear-gradient(135deg,#F0F7F0,#E8F5E8);
  border:1px solid #A8D5A8;
  border-radius:10px;
  padding:16px 20px;
  margin:16px 0;
  font-size:14px;
  line-height:1.7;
}
.coach-tip-label{
  font-size:11px;font-weight:700;letter-spacing:1px;color:#2E7D32;margin-bottom:6px;text-transform:uppercase;
}

/* KEY CONCEPT CARDS */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:20px;
  max-width:1100px;
}
.k-card{
  background:#fff;
  border:1px solid #E8E2DC;
  border-radius:12px;
  padding:24px;
  cursor:pointer;
  transition:all .3s;
  position:relative;
  overflow:hidden;
}
.k-card:hover{border-color:#bbb;transform:translateY(-2px);box-shadow:0 4px 20px rgba(0,0,0,.06)}
.k-card-num{
  font-size:11px;font-weight:700;color:#999;letter-spacing:2px;margin-bottom:8px;
}
.k-card-title{
  font-size:16px;font-weight:700;margin-bottom:10px;line-height:1.3;
}
.k-card-summary{
  font-size:13px;font-weight:300;color:#666;line-height:1.7;margin-bottom:12px;
}
.k-card-detail{
  display:none;
  font-size:13px;
  font-weight:300;
  color:#444;
  line-height:1.8;
  border-top:1px solid #E8E2DC;
  padding-top:12px;
  margin-top:4px;
}
.k-card.expanded .k-card-detail{display:block}
.k-card-toggle{
  font-size:11px;font-weight:600;color:#999;letter-spacing:1px;
  display:flex;align-items:center;gap:6px;
}
.k-card-toggle::after{content:'▼';font-size:8px;transition:transform .2s}
.k-card.expanded .k-card-toggle::after{transform:rotate(180deg)}

/* QUIZ */
.quiz-block{max-width:780px}
.quiz-item{
  background:#fff;
  border:1px solid #E8E2DC;
  border-radius:12px;
  padding:24px;
  margin-bottom:16px;
}
.quiz-q{
  font-size:15px;font-weight:600;line-height:1.6;margin-bottom:16px;
}
.quiz-q-num{
  display:inline-block;
  background:#1A1A1A;
  color:#F5F0EB;
  width:24px;height:24px;
  border-radius:50%;
  text-align:center;
  line-height:24px;
  font-size:12px;
  font-weight:700;
  margin-right:10px;
  vertical-align:middle;
}
.quiz-options{list-style:none;padding:0;margin:0}
.quiz-options li{
  padding:10px 14px;
  margin-bottom:6px;
  border:1px solid #E8E2DC;
  border-radius:8px;
  font-size:14px;
  line-height:1.6;
  cursor:pointer;
  transition:all .2s;
}
.quiz-options li:hover{border-color:#bbb;background:rgba(0,0,0,.02)}
.quiz-options li.correct{border-color:#4CAF50;background:#E8F5E9;color:#2E7D32;font-weight:600}
.quiz-options li.wrong{border-color:#EF5350;background:#FFEBEE;color:#C62828}
.quiz-options li.disabled{pointer-events:none;opacity:.7}
.quiz-answer{
  display:none;
  margin-top:12px;
  padding:12px 16px;
  background:#F0F7F0;
  border-radius:8px;
  font-size:13px;
  line-height:1.7;
  color:#333;
}
.quiz-answer.show{display:block}

/* SOP */
.sop-block{max-width:780px}
.sop-item{
  background:#fff;
  border:1px solid #E8E2DC;
  border-radius:12px;
  padding:28px;
  margin-bottom:20px;
}
.sop-item h3{
  font-size:18px;font-weight:700;margin-bottom:6px;
}
.sop-item-sub{
  font-size:12px;color:#888;letter-spacing:1px;margin-bottom:16px;
}
.sop-step{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:10px 0;
  border-bottom:1px solid #F0EBE6;
}
.sop-step:last-child{border-bottom:none}
.sop-check{
  width:22px;height:22px;
  border:2px solid #D8D2CB;
  border-radius:5px;
  flex-shrink:0;
  cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all .2s;
  margin-top:2px;
}
.sop-check.checked{
  background:#1A1A1A;
  border-color:#1A1A1A;
}
.sop-check.checked::after{
  content:'✓';
  color:#F5F0EB;
  font-size:12px;
  font-weight:700;
}
.sop-step-text{font-size:14px;line-height:1.7;color:#333}
.sop-step-text strong{font-weight:600}

/* FOOTER */
.footer{
  border-top:1px solid #D8D2CB;
  padding:40px 8vw;
  text-align:center;
}
.footer-text{font-size:11px;color:#aaa;letter-spacing:2px;text-transform:uppercase}

/* RESPONSIVE */
@media(max-width:768px){
  .ch-hero{padding:48px 6vw 40px}
  .section{padding:40px 6vw}
  .tabs{padding:0 6vw;overflow-x:auto}
  .tab-btn{padding:14px 16px;font-size:12px;white-space:nowrap}
  .cards-grid{grid-template-columns:1fr}
  .nav-links{display:none}
}