:root{
  --main:#0891b2;
  --accent:#0ea5e9;
  --bg:#ecfeff;
  --ink:#083344;
  --line:#083344;
  --soft:#cffafe;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:400;
  line-height:1.75;
  margin:0;
  overflow-x:hidden;
}
h1,h2,h3,h4,.serif{
  font-family:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
  font-weight:800;
  letter-spacing:-0.01em;
}
a{text-decoration:none;color:inherit;}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;}
.brutal{background:#fff;border:3px solid var(--line);box-shadow:8px 8px 0 var(--line);}
.btn-hard{
  display:inline-block;
  background:var(--main);
  color:#fff;
  border:3px solid var(--line);
  box-shadow:6px 6px 0 var(--line);
  padding:12px 26px;
  font-weight:700;
  letter-spacing:.02em;
  transition:.18s ease;
}
.btn-hard:hover{transform:translate(3px,3px);box-shadow:2px 2px 0 var(--line);color:#fff;}
.btn-ghost{
  display:inline-block;background:#fff;color:var(--ink);
  border:3px solid var(--line);box-shadow:6px 6px 0 var(--line);
  padding:12px 26px;font-weight:700;transition:.18s ease;
}
.btn-ghost:hover{transform:translate(3px,3px);box-shadow:2px 2px 0 var(--line);}

/* ---------- NAV ---------- */
.nav-shell{
  position:sticky;top:0;z-index:1040;
  background:var(--bg);
  border-bottom:3px solid var(--line);
}
.nav-inner{
  max-width:1180px;margin:0 auto;padding:12px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  font-family:"Source Han Serif SC","Noto Serif SC",serif;
  font-weight:900;font-size:1.35rem;color:var(--ink);
  display:flex;align-items:center;gap:10px;
}
.brand .mark{
  width:34px;height:34px;background:var(--main);border:3px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:.95rem;
}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.nav-links a{
  padding:8px 14px;font-weight:600;font-size:.95rem;color:var(--ink);
  border:2px solid transparent;transition:.16s;
}
.nav-links a:hover{border-color:var(--line);background:#fff;}
.nav-toggle{
  display:none;background:#fff;border:3px solid var(--line);
  width:46px;height:42px;font-size:1.1rem;color:var(--ink);
}
@media(max-width:860px){
  .nav-toggle{display:block;}
  .nav-links{
    display:none;width:100%;flex-direction:column;align-items:stretch;
    border-top:3px solid var(--line);margin-top:10px;padding-top:8px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{border:2px solid var(--line);background:#fff;margin-bottom:6px;}
}

/* ---------- HERO ---------- */
.hero{
  position:relative;overflow:hidden;
  border-bottom:3px solid var(--line);
  padding:90px 0 70px;
  background:
    linear-gradient(180deg,#ecfeff 0%,#dffafe 100%);
}
.hero-bg{
  position:absolute;inset:-10% -5%;
  background-image:
    linear-gradient(90deg,rgba(8,145,178,.10) 1px,transparent 1px),
    linear-gradient(0deg,rgba(8,145,178,.10) 1px,transparent 1px);
  background-size:56px 56px;
  z-index:0;
  will-change:transform;
}
.floaty{
  position:absolute;border:3px solid var(--line);z-index:1;
  animation:drift 9s ease-in-out infinite;
}
.f1{width:78px;height:78px;background:var(--accent);top:14%;right:12%;}
.f2{width:46px;height:46px;background:var(--main);bottom:18%;right:26%;animation-delay:1.8s;}
.f3{width:120px;height:24px;background:#fff;top:22%;left:6%;animation-delay:.9s;}
.f4{width:30px;height:30px;background:var(--ink);bottom:12%;left:14%;animation-delay:2.6s;}
@keyframes drift{
  0%,100%{transform:translateY(0) rotate(0deg);}
  50%{transform:translateY(-18px) rotate(6deg);}
}
.hero-inner{position:relative;z-index:3;}
.hero-tag{
  display:inline-block;background:#fff;border:3px solid var(--line);
  padding:6px 16px;font-weight:700;font-size:.85rem;letter-spacing:.06em;
  box-shadow:5px 5px 0 var(--line);margin-bottom:26px;
}
.hero h1{
  font-size:clamp(2.4rem,6.4vw,4.05rem);
  line-height:1.1;margin:0 0 22px;
  background:linear-gradient(92deg,var(--main) 0%,var(--accent) 60%,#22d3ee 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero p.lead-txt{
  font-size:1.08rem;max-width:620px;color:#0c4a5e;margin-bottom:34px;
}
.hero-stats{display:flex;gap:0;flex-wrap:wrap;margin-top:44px;}
.hero-stats div{
  border:3px solid var(--line);background:#fff;padding:14px 24px;
  margin:0 8px 8px 0;min-width:150px;
}
.hero-stats b{display:block;font-size:1.7rem;font-family:"Source Han Serif SC",serif;color:var(--main);}
.hero-stats span{font-size:.85rem;font-weight:600;color:#155e75;}

/* ---------- SECTION SHELL ---------- */
section{padding:78px 0;position:relative;}
.sec-head{margin-bottom:46px;}
.sec-num{
  display:inline-block;background:var(--ink);color:#fff;
  font-weight:800;font-size:.78rem;letter-spacing:.14em;
  padding:5px 12px;margin-bottom:16px;
}
.sec-head h2{font-size:clamp(1.85rem,4.2vw,2.8rem);margin:0 0 12px;}
.sec-head p{max-width:660px;color:#155e75;margin:0;}
.alt-band{background:#fff;border-top:3px solid var(--line);border-bottom:3px solid var(--line);}

/* ---------- TIMELINE RAIL ---------- */
.rail{position:relative;padding-left:34px;}
.rail::before{
  content:"";position:absolute;left:9px;top:6px;bottom:6px;
  width:4px;background:var(--line);
}
.rail-node{position:relative;margin-bottom:44px;}
.rail-node::before{
  content:"";position:absolute;left:-33px;top:8px;
  width:20px;height:20px;background:var(--accent);
  border:3px solid var(--line);
}
.rail-node h3{font-size:1.3rem;margin:0 0 8px;}
.rail-node p{margin:0;color:#155e75;}

/* ---------- FEATURE ICONS ---------- */
.icon-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:3px solid var(--line);background:#fff;}
.icon-item{
  padding:32px 28px;border-right:3px solid var(--line);border-bottom:3px solid var(--line);
  transition:.2s ease;
}
.icon-item:hover{background:var(--soft);}
.icon-item i{
  font-size:1.6rem;color:var(--main);display:block;margin-bottom:16px;
}
.icon-item h4{font-size:1.12rem;margin:0 0 8px;}
.icon-item p{margin:0;font-size:.94rem;color:#155e75;}
@media(max-width:760px){.icon-list{grid-template-columns:1fr;} .icon-item{border-right:none;}}
.icon-list .icon-item:nth-child(2n){border-right:none;}

/* ---------- ACCORDION ---------- */
.acc-item{border:3px solid var(--line);background:#fff;margin-bottom:-3px;}
.acc-q{
  width:100%;text-align:left;background:#fff;border:none;
  padding:22px 26px;font-weight:800;font-size:1.08rem;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-family:"Source Han Serif SC",serif;cursor:pointer;transition:.16s;
}
.acc-q:hover{background:var(--soft);}
.acc-q .fa-solid{color:var(--main);transition:transform .22s;}
.acc-item.open .acc-q .fa-solid{transform:rotate(45deg);}
.acc-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  border-top:0 solid var(--line);
}
.acc-item.open .acc-a{max-height:520px;border-top:3px solid var(--line);}
.acc-a p{padding:20px 26px;margin:0;color:#155e75;}

/* ---------- POSTER GRID ---------- */
.poster-grid{
  display:grid;grid-template-columns:repeat(6,1fr);gap:22px;
}
@media(max-width:1100px){.poster-grid{grid-template-columns:repeat(4,1fr);}}
@media(max-width:760px){.poster-grid{grid-template-columns:repeat(3,1fr);}}
@media(max-width:480px){.poster-grid{grid-template-columns:repeat(2,1fr);gap:14px;}}
.card-m{
  background:#fff;border:3px solid var(--line);box-shadow:6px 6px 0 var(--line);
  transition:.2s ease;display:flex;flex-direction:column;
}
.card-m:hover{transform:translate(-4px,-4px);box-shadow:12px 12px 0 var(--main);}
.card-m .thumb{
  width:100%;aspect-ratio:2/3;object-fit:cover;display:block;
  border-bottom:3px solid var(--line);background:var(--soft);
}
.card-m .meta{padding:12px 12px 14px;}
.card-m .meta h4{
  font-size:.95rem;margin:0 0 6px;line-height:1.35;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.card-m .meta span{font-size:.78rem;color:#0e7490;font-weight:600;}

/* lazy fade */
.lazy-img{opacity:0;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease;}
.lazy-img.shown{opacity:1;transform:none;}

/* ---------- CTA ---------- */
.cta-block{
  border:3px solid var(--line);background:var(--ink);color:#ecfeff;
  padding:60px 46px;box-shadow:10px 10px 0 var(--main);
}
.cta-block h2{color:#fff;font-size:clamp(1.7rem,4vw,2.5rem);margin:0 0 16px;}
.cta-block p{color:#a5f3fc;max-width:600px;margin:0 0 30px;}
.cta-block .btn-hard{background:var(--accent);}

/* ---------- FOOTER ---------- */
footer{background:#fff;border-top:3px solid var(--line);padding:56px 0 26px;}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;}
@media(max-width:760px){.f-grid{grid-template-columns:1fr;}}
footer h5{font-size:1rem;font-weight:800;margin:0 0 16px;font-family:"Source Han Serif SC",serif;}
footer ul{list-style:none;padding:0;margin:0;}
footer li{margin-bottom:9px;}
footer a{font-size:.92rem;color:#155e75;font-weight:500;}
footer a:hover{color:var(--main);text-decoration:underline;}
.friend-links{
  margin-top:34px;padding-top:24px;border-top:3px solid var(--line);
}
.friend-links h5{margin-bottom:10px;}
.friend-links p{font-size:.9rem;color:#155e75;margin:0;word-break:break-word;}
.copy{margin-top:26px;padding-top:18px;border-top:2px dashed #94a3b8;font-size:.85rem;color:#475569;}

/* --- 子页面追加 --- */
.about-hero {padding:52px 0 30px;}
.about-hero h1 {font-size:clamp(1.9rem,4.4vw,3.1rem);line-height:1.18;margin:14px 0 16px;font-weight:900;letter-spacing:-.5px;}
.about-hero p.lead {max-width:760px;font-size:1.02rem;line-height:1.85;opacity:.9;}
.fact-row {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:26px;}
.fact-card {border:3px solid var(--line);background:#fff;border-radius:14px;padding:16px 16px 14px;box-shadow:5px 5px 0 rgba(8,51,68,.16);}
.fact-card b {display:block;font-size:1.5rem;font-weight:900;color:var(--main);line-height:1.2;}
.fact-card span {font-size:.83rem;opacity:.78;}
.prose {font-size:.98rem;line-height:1.92;}
.prose p {margin-bottom:14px;}
.prose strong {color:var(--main);}
.rule-list {list-style:none;padding:0;margin:0;}
.rule-list li {border:3px solid var(--line);background:#fff;border-radius:14px;padding:14px 16px;margin-bottom:12px;box-shadow:4px 4px 0 rgba(8,51,68,.14);}
.rule-list li b {display:block;font-weight:800;margin-bottom:5px;}
.rule-list li p {margin:0;font-size:.92rem;line-height:1.8;opacity:.88;}
.rule-list li i {color:var(--accent);margin-right:8px;}
.tl {position:relative;padding-left:26px;margin-top:8px;}
.tl::before {content:"";position:absolute;left:8px;top:6px;bottom:6px;width:3px;background:var(--line);opacity:.28;border-radius:3px;}
.tl-item {position:relative;margin-bottom:20px;}
.tl-item::before {content:"";position:absolute;left:-25px;top:6px;width:13px;height:13px;border-radius:50%;background:var(--accent);border:3px solid var(--line);}
.tl-item h4 {font-size:1rem;font-weight:800;margin:0 0 6px;}
.tl-item p {margin:0;font-size:.92rem;line-height:1.8;opacity:.88;}
.faq-item {border:3px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;background:#fff;}
.faq-q {display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;font-weight:800;cursor:pointer;font-size:.96rem;}
.faq-q i {color:var(--accent);transition:transform .25s;}
.faq-item.open .faq-q i {transform:rotate(45deg);}
.faq-a {max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 16px;}
.faq-item.open .faq-a {max-height:420px;}
.faq-a p {font-size:.92rem;line-height:1.85;padding-bottom:14px;margin:0;opacity:.9;}
.mini-card {border:3px solid var(--line);border-radius:14px;background:#fff;padding:18px;box-shadow:5px 5px 0 rgba(8,51,68,.16);height:100%;}
.mini-card h3 {font-size:1.02rem;font-weight:800;margin:10px 0 8px;}
.mini-card p {font-size:.9rem;line-height:1.8;margin:0;opacity:.88;}
.mini-card .ic {width:42px;height:42px;border-radius:11px;background:var(--soft);border:3px solid var(--line);display:grid;place-items:center;color:var(--main);font-size:1.05rem;}
.cta-box {border:3px solid var(--line);border-radius:16px;background:var(--soft);padding:24px;box-shadow:6px 6px 0 rgba(8,51,68,.2);}
.fact-row {grid-template-columns:repeat(2,minmax(0,1fr));}

/* --- 子页面追加 --- */
.guide-hero {position:relative;overflow:hidden;padding:64px 0 40px;}
.guide-hero h1 {font-size:clamp(28px,4.6vw,46px);line-height:1.15;font-weight:900;margin:14px 0 16px;}
.guide-hero p.lead {max-width:720px;font-size:17px;line-height:1.8;opacity:.86;margin:0;}
.step-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:26px;}
.step-card {background:#fff;border:2px solid var(--line);border-radius:14px;padding:22px 20px;box-shadow:6px 6px 0 var(--line);transition:transform .18s ease,box-shadow .18s ease;}
.step-card:hover {transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--line);}
.step-card .num {display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:var(--main);color:#fff;font-weight:800;font-size:16px;margin-bottom:12px;}
.step-card h3 {font-size:17px;font-weight:800;margin:0 0 8px;color:var(--ink);}
.step-card p {margin:0;font-size:14.5px;line-height:1.75;color:var(--ink);opacity:.82;}
.tip-list {list-style:none;padding:0;margin:18px 0 0;}
.tip-list li {position:relative;padding:12px 14px 12px 46px;border:2px dashed var(--line);border-radius:12px;margin-bottom:12px;background:rgba(255,255,255,.7);font-size:15px;line-height:1.7;}
.tip-list li i {position:absolute;left:15px;top:14px;color:var(--main);font-size:16px;}
.qa {background:#fff;border:2px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:14px;box-shadow:5px 5px 0 var(--soft);}
.qa h4 {font-size:16px;font-weight:800;margin:0 0 8px;display:flex;gap:9px;align-items:flex-start;color:var(--ink);}
.qa h4 i {color:var(--accent);margin-top:3px;}
.qa p {margin:0;font-size:14.5px;line-height:1.75;opacity:.85;}
.genre-chips {display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.genre-chips span {display:inline-block;padding:7px 15px;border-radius:999px;border:2px solid var(--line);background:#fff;font-size:13.5px;font-weight:600;}
.genre-chips span:nth-child(3n+1) {background:var(--soft);}
.genre-chips span:nth-child(3n+2) {background:#fff;}
.genre-chips span:nth-child(3n) {background:rgba(8,145,178,.14);}
.cta-band {margin-top:44px;background:var(--ink);color:#ecfeff;border-radius:16px;padding:34px 28px;border:2px solid var(--line);}
.cta-band h3 {margin:0 0 10px;font-size:22px;font-weight:900;}
.cta-band p {margin:0 0 18px;opacity:.85;font-size:15px;line-height:1.75;max-width:640px;}
.cta-band .btn-hard {margin-right:10px;}
.guide-hero {padding:44px 0 26px;}
.cta-band {padding:26px 18px;}

/* --- 子页面追加 --- */
.map-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.map-card {background:#fff;border:3px solid var(--line);box-shadow:6px 6px 0 var(--line);padding:22px 20px;border-radius:4px;height:100%}
.map-card h3 {margin:0 0 14px;font-size:1.12rem;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:9px}
.map-card h3 i {color:var(--main)}
.map-list {list-style:none;margin:0;padding:0}
.map-list li {margin:0 0 11px}
.map-list a {color:var(--ink);text-decoration:none;font-weight:600;font-size:.96rem;display:inline-flex;align-items:center;gap:8px;transition:.18s}
.map-list a:hover {color:var(--main);transform:translateX(3px)}
.map-list a i {font-size:.72rem;color:var(--accent)}
.map-list .sub-note {display:block;font-size:.82rem;color:#4b6b78;font-weight:400;margin-top:3px;padding-left:18px}
.map-anchor {display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.map-anchor a {background:var(--soft);border:2px solid var(--line);color:var(--ink);font-weight:700;font-size:.86rem;
    padding:7px 14px;border-radius:999px;text-decoration:none;transition:.18s}
.map-anchor a:hover {background:var(--main);color:#fff}
.tree {margin:0;padding:0;list-style:none}
.tree li {position:relative;padding-left:22px;margin-bottom:9px;font-size:.95rem;color:var(--ink)}
.tree li::before {content:"\f0da";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;left:0;top:0;color:var(--accent);font-size:.75rem}
.tree li a {color:var(--ink);font-weight:600;text-decoration:none}
.tree li a:hover {color:var(--main);text-decoration:underline}
.map-note {background:var(--soft);border-left:6px solid var(--main);padding:16px 20px;border-radius:0 4px 4px 0;margin-top:26px}
.map-note p {margin:0;font-size:.95rem;color:var(--ink)}
.upd {font-size:.85rem;color:#4b6b78;margin-top:8px}