/* 心森文創 2027 流年快閃｜銀藍霧感 */
:root{--mist:#F4F6F8;--mist2:#E6ECF2;--blue:#BFD0DF;--ac:#6F8FAD;--ac-d:#4E6C8A;--ink:#2B3742;--mute:#6B7A88;--line:#D5DEE7;--white:#FFFFFF;--line-green:#06C755}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--mist);color:var(--ink);font:400 16px/1.8 'Noto Sans TC','PingFang TC',sans-serif;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--ac-d)}
.serif{font-family:'Noto Serif TC','Songti TC',serif}
.en{font-family:'Cormorant Garamond',serif;font-style:italic;letter-spacing:.06em}
.wrap{max-width:720px;margin:0 auto;padding:0 20px}
.k{font:500 11px 'Jost',sans-serif;letter-spacing:.3em;color:var(--ac);text-transform:uppercase}
/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(ellipse 80% 55% at 50% 30%,#C9D8E5 0%,#E3EAF1 45%,#F4F6F8 75%);padding:28px 0 48px;text-align:center}
.hero img{width:min(72%,320px);margin:0 auto;border-radius:4px;box-shadow:0 18px 50px -20px rgba(78,108,138,.45)}
.hero h1{font:600 clamp(28px,7.5vw,44px)/1.3 'Noto Serif TC',serif;color:var(--ac-d);letter-spacing:.12em;margin:28px 0 6px}
.hero .sub{color:var(--ac);letter-spacing:.2em;font-size:15px}
.hero .tag{margin:18px auto 0;max-width:30em;color:var(--ink);font-size:16px}
.badge{display:inline-block;margin-top:16px;padding:4px 16px;border:1px solid var(--ac);color:var(--ac-d);font-size:14px;letter-spacing:.3em;background:rgba(255,255,255,.6)}
/* buttons */
.cta{display:flex;flex-direction:column;gap:12px;margin:26px auto 0;max-width:360px}
.btn{display:block;text-align:center;text-decoration:none;padding:15px 18px;font:600 17px 'Noto Sans TC',sans-serif;letter-spacing:.08em;border-radius:999px;transition:transform .15s,box-shadow .15s;cursor:pointer;border:0}
.btn:active{transform:scale(.98)}
.btn-line{background:var(--line-green);color:#fff;box-shadow:0 8px 22px -10px rgba(6,199,85,.7)}
.btn-pri{background:linear-gradient(135deg,#7E9DB9,#4E6C8A);color:#fff;box-shadow:0 8px 22px -10px rgba(78,108,138,.8)}
.btn-ghost{background:rgba(255,255,255,.75);color:var(--ac-d);border:1px solid var(--ac)}
/* sections */
section{padding:52px 0;border-top:1px solid var(--line)}
section:nth-of-type(even){background:var(--white)}
h2{font:600 24px/1.4 'Noto Serif TC',serif;color:var(--ac-d);letter-spacing:.1em;margin:6px 0 20px}
.lead{color:var(--mute);margin-bottom:20px}
.grid{display:grid;gap:14px}
@media(min-width:620px){.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--white);border:1px solid var(--line);padding:20px;border-radius:6px}
section:nth-of-type(even) .card{background:var(--mist)}
.card h3{font:600 17px 'Noto Serif TC',serif;color:var(--ac-d);margin-bottom:6px}
.card p{font-size:15px;color:var(--ink)}
ul.dot{list-style:none}ul.dot li{padding-left:1.2em;position:relative;margin-bottom:6px}
ul.dot li:before{content:"✦";position:absolute;left:0;color:var(--ac);font-size:12px;top:3px}
/* price */
.price{display:grid;gap:12px}
.tier{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 20px;border:1px solid var(--line);border-radius:6px;background:var(--white)}
.tier.hot{border:2px solid var(--ac);background:linear-gradient(135deg,#FFFFFF,#EAF0F6)}
.tier .n{font-weight:600}.tier .d{font-size:13px;color:var(--mute)}
.tier .p{font:600 26px 'Jost',sans-serif;color:var(--ac-d);white-space:nowrap}
.tier .p small{font-size:13px;font-weight:400;margin-left:2px}
.tier .orig{text-decoration:line-through;color:var(--mute);font:400 18px 'Jost',sans-serif}
.note{font-size:13px;color:var(--mute);margin-top:12px}
/* steps */
ol.steps{list-style:none;counter-reset:s;display:grid;gap:14px}
ol.steps li{counter-increment:s;position:relative;padding:16px 16px 16px 64px;background:var(--white);border:1px solid var(--line);border-radius:6px}
ol.steps li:before{content:counter(s);position:absolute;left:16px;top:14px;width:34px;height:34px;border-radius:50%;background:var(--ac);color:#fff;font:600 17px/34px 'Jost',sans-serif;text-align:center}
ol.steps b{display:block;color:var(--ac-d)}
/* faq */
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{cursor:pointer;font-weight:600;list-style:none;position:relative;padding-right:24px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:0;top:0;color:var(--ac);font-size:20px;line-height:1.4}
details[open] summary:after{content:"−"}
details p{margin-top:8px;color:var(--ink);font-size:15px}
/* footer & sticky */
footer{text-align:center;padding:40px 20px 110px;color:var(--mute);font-size:13px;background:linear-gradient(180deg,var(--mist),var(--mist2))}
footer .k{display:block;margin-bottom:6px}
.sticky{position:fixed;left:0;right:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(244,246,248,.92);backdrop-filter:blur(8px);border-top:1px solid var(--line);display:flex;gap:10px;z-index:9}
.sticky .btn{flex:1;padding:12px;font-size:15px}
@media(min-width:900px){.sticky{left:auto;right:24px;bottom:24px;border:1px solid var(--line);border-radius:999px;width:420px}}