/* ClubSys 產品站 v3 — 米白紙底、深炭字、酒紅主色、鼠尾草輔色、咖啡黑深區;無漸層、無發光 */
:root{
  --paper:#f5f1e8; --paper-2:#ede7da; --card:#fbf8f2; --nav-bg:rgba(245,241,232,.94);
  --ink:#1f1b17; --ink-2:#4a433b; --ink-3:#6b6257;
  --rule:rgba(31,27,23,.14); --rule-2:rgba(31,27,23,.26);
  --wine:#7a1f2b; --wine-2:#5f1621; --wine-soft:rgba(122,31,43,.08);
  --sage:#5e7266; --sage-ink:#3f4f45;
  --dark:#1b1613; --dark-2:#26201b; --on-dark:#efe8dc; --on-dark-2:#c2b8aa; --rule-dark:rgba(239,232,220,.14);
  --maxw:1180px; --gut:clamp(16px,4vw,40px);
  --shb:0 2px 4px rgba(10,15,26,.18),0 8px 18px rgba(10,15,26,.16);
  --shot:0 1px 2px rgba(31,27,23,.08),0 22px 44px -22px rgba(31,27,23,.45);
  --serif:"Noto Serif TC","Songti TC",serif;
  --sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
body{margin:0;background-color:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;margin:0;letter-spacing:.01em;text-wrap:balance}
:focus-visible{outline:2px solid var(--wine);outline-offset:3px;border-radius:3px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55em;font-weight:700;font-size:.98rem;padding:.78em 1.4em;border-radius:4px;border:1px solid transparent;line-height:1.1;transition:background-color .18s,border-color .18s,color .18s}
.btn svg{width:1em;height:1em}
.btn-wine{background-color:var(--wine);color:#fff;box-shadow:var(--shb)}
.btn-wine:hover{background-color:var(--wine-2)}
.btn-line{background-color:transparent;color:var(--ink);border-color:var(--rule-2)}
.btn-line:hover{border-color:var(--wine);color:var(--wine)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background-color:var(--nav-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:13px var(--gut);display:flex;align-items:center;gap:20px;position:relative}
.logo{display:flex;align-items:baseline;gap:10px;flex:none}
.logo b{font-family:var(--serif);font-size:1.4rem;font-weight:900;letter-spacing:.01em}
.logo b em{font-style:normal;color:var(--wine)}
.logo small{font-size:.78rem;color:var(--ink-3);letter-spacing:.08em}
.links{display:flex;align-items:center;gap:4px;margin-left:auto}
.links a{font-size:.95rem;color:var(--ink-2);padding:.4em .7em;white-space:nowrap;border-bottom:1px solid transparent}
.links a:hover{color:var(--wine)}
.links a.on{color:var(--wine);border-bottom-color:var(--wine)}
.links a.home{font-size:.86rem;color:var(--ink-3);margin-left:8px}
.nav .btn{padding:.62em 1.15em;font-size:.92rem}
.burger{display:none;margin-left:auto;background-color:transparent;border:1px solid var(--rule-2);border-radius:4px;padding:9px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;margin:4px 0;background-color:var(--ink)}

/* hero */
.hero{padding:clamp(56px,8vw,104px) 0 clamp(48px,6vw,72px);border-bottom:1px solid var(--rule)}
.hero-top{display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(24px,5vw,72px);align-items:end}
.kicker{font-size:.9rem;font-weight:700;color:var(--wine);letter-spacing:.08em;margin:0 0 18px}
.hero h1{font-size:clamp(2.4rem,5.4vw,4.2rem);line-height:1.18;font-weight:900}
.hero h1 em{font-style:normal;color:var(--wine);white-space:nowrap}
.hero .lede{margin:0;color:var(--ink-2);font-size:1.05rem}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hint{margin:16px 0 0;font-size:.88rem;color:var(--ink-3)}
.hint b{color:var(--sage-ink)}
.hero-shot{margin:clamp(40px,5vw,64px) 0 0}
.frame{border:1px solid var(--rule-2);border-radius:6px;overflow:hidden;background-color:var(--dark);box-shadow:var(--shot)}
.cap{margin:12px 0 0;font-size:.85rem;color:var(--ink-3)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);margin-top:clamp(40px,5vw,60px);border-top:1px solid var(--rule)}
.stats div{padding:20px 20px 0 0}
.stats div+div{padding-left:20px;border-left:1px solid var(--rule)}
.stats b{display:block;font-family:var(--serif);font-size:2.2rem;font-weight:900;line-height:1.1;color:var(--wine)}
.stats span{display:block;font-size:.9rem;color:var(--ink-2);margin-top:4px}

/* section shells */
.sec{padding:clamp(64px,8vw,108px) 0;border-bottom:1px solid var(--rule)}
.sec.alt{background-color:var(--paper-2)}
.head{max-width:42em;margin-bottom:clamp(32px,4vw,52px)}
.head h2{font-size:clamp(1.85rem,3.4vw,2.75rem);line-height:1.25;font-weight:900}
.head p{margin:14px 0 0;color:var(--ink-2);font-size:1.05rem}

/* 模組總覽:單色線條圖示 */
.mods{display:grid;grid-template-columns:repeat(8,1fr);border-top:1px solid var(--rule);border-left:1px solid var(--rule)}
.mod{display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px 8px 16px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);font-size:.92rem;color:var(--ink-2);text-align:center;line-height:1.35}
.mod svg{width:26px;height:26px;color:var(--ink)}
.mods-note{margin:16px 0 0;color:var(--ink-3);font-size:.9rem}

/* 核心流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--ink)}
.flow>div{padding:22px 22px 6px;border-left:1px solid var(--rule)}
.flow .no{font-family:var(--serif);font-size:2.4rem;font-weight:900;color:var(--wine);line-height:1}
.flow h3{font-size:1.32rem;margin:14px 0 8px}
.flow p{margin:0;color:var(--ink-2);font-size:.95rem;line-height:1.75}
.feed{list-style:none;margin:12px 0 0;padding:0;display:grid}
.feed li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-top:1px solid var(--rule);font-size:.88rem;color:var(--ink-2)}
.feed em{font-style:normal;font-weight:700;color:var(--wine);white-space:nowrap}
.feed em.r{color:var(--sage-ink)}
.quote{margin:40px 0 0;padding:20px 0;border-top:1px solid var(--wine);border-bottom:1px solid var(--wine);max-width:48em;font-family:var(--serif);font-size:1.15rem;line-height:1.8;color:var(--ink)}

/* 功能:左清單、右內容切換 */
[hidden]{display:none!important}
.ftabs{display:grid;grid-template-columns:250px minmax(0,1fr);gap:clamp(28px,4vw,52px);align-items:start}
.tablist{display:flex;flex-direction:column;border-top:1px solid var(--rule);position:sticky;top:84px}
.tab{display:flex;align-items:center;gap:12px;width:100%;padding:14px 14px;background-color:transparent;border:0;border-bottom:1px solid var(--rule);font-family:var(--sans);font-size:1rem;line-height:1.4;color:var(--ink-2);text-align:left;cursor:pointer}
.tab svg{width:22px;height:22px;flex:none}
.tab:hover{color:var(--wine)}
.tab.on{color:var(--wine);font-weight:700;background-color:var(--wine-soft)}
.tp{min-width:0}
.tp+.tp{margin-top:64px}
.js .tp+.tp{margin-top:0}
.tp:focus-visible{outline-offset:6px}
.tp-txt{display:grid;grid-template-columns:1fr 1fr;gap:0 36px;margin-top:28px;align-items:start}
.tp-txt h3{grid-column:1;font-size:clamp(1.5rem,2.4vw,1.9rem);line-height:1.3;font-weight:900;margin:0 0 12px}
.tp-txt>p{grid-column:1;margin:0;color:var(--ink-2)}
.tp-txt .tags{grid-column:1}
.tp-txt .specs{grid-column:2;grid-row:1/span 3;margin:0}
/* v3c 客製分組切換(index.html 未使用) */
.tab .cnt{margin-left:auto;font-size:.82rem;font-weight:400;color:var(--ink-3)}
.ctabs{margin-top:36px}
.ctabs .group ul{columns:2;column-gap:36px}
.ctabs .group li{break-inside:avoid}
.specs{margin:20px 0 0;border-top:1px solid var(--rule)}
.specs div{display:grid;grid-template-columns:64px 1fr;gap:14px;padding:10px 0;border-bottom:1px solid var(--rule)}
.specs dt{font-weight:700;font-size:.9rem;color:var(--ink)}
.specs dd{margin:0;font-size:.93rem;color:var(--ink-2);line-height:1.7}
.specs dd b{color:var(--ink)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.tag{font-size:.82rem;padding:.2em .75em;border:1px solid var(--rule-2);border-radius:3px;color:var(--ink-2)}
.tag.w{border-color:var(--wine);color:var(--wine)}
.shot{margin:0}
.shot figcaption{margin-top:12px;font-size:.86rem;color:var(--ink-3)}
.gal{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:88px;padding-top:64px;border-top:1px solid var(--rule)}
.gal h3{grid-column:1/-1;font-size:1.5rem}
.gal figure{margin:0}
.gal figcaption{margin-top:10px;font-size:.9rem;color:var(--ink-2)}

/* 客製化 */
.rules{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--rule);border-left:1px solid var(--rule)}
.rule{padding:24px 24px 22px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);display:flex;flex-direction:column;background-color:var(--card)}
.rule .k{font-size:.86rem;font-weight:700;color:var(--wine);letter-spacing:.06em}
.rule h3{font-size:1.32rem;margin:8px 0 8px}
.rule p{margin:0;color:var(--ink-2);font-size:.94rem;line-height:1.75}
.ex{margin-top:auto;padding-top:16px}
.ex div{border-left:2px solid var(--sage);padding:4px 0 4px 16px;font-size:.88rem;color:var(--ink-2);line-height:1.75}
.ex b{color:var(--ink)}
.done{margin-top:clamp(64px,8vw,96px)}
.done-h{max-width:42em}
.done-h h3{font-size:clamp(1.6rem,2.8vw,2.2rem);line-height:1.3;font-weight:900}
.done-h p{margin:12px 0 0;color:var(--ink-2)}
.groups{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,48px) clamp(24px,4vw,56px);margin-top:36px}
.group h4{font-size:1.3rem;font-weight:900;display:flex;align-items:baseline;gap:12px;padding-bottom:10px;border-bottom:2px solid var(--ink);margin-top:16px}
.group h4 span{font-family:var(--sans);font-size:.84rem;font-weight:600;color:var(--ink-3)}
.group ul{list-style:none;margin:0;padding:0}
.group li{padding:9px 0 9px 18px;border-bottom:1px solid var(--rule);font-size:.93rem;color:var(--ink-2);line-height:1.7;position:relative}
.group li::before{content:"";position:absolute;left:2px;top:1.15em;width:6px;height:6px;background-color:var(--wine)}
.group li b{color:var(--ink)}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,56px);margin-top:clamp(64px,8vw,96px);align-items:start}
.sub{font-size:1.5rem;font-weight:900;margin:0 0 6px}
.sub-p{margin:0 0 14px;color:var(--ink-2);font-size:.95rem}
.list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.list li{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;padding:13px 0;border-bottom:1px solid var(--rule)}
.list b{display:block;font-size:1rem}
.list span{display:block;font-size:.88rem;color:var(--ink-2);line-height:1.55}
.st{font-size:.8rem;font-weight:700;padding:.18em .7em;border-radius:3px;border:1px solid;white-space:nowrap}
.st-on{color:var(--sage-ink);border-color:var(--sage)}
.st-cus{color:var(--ink-2);border-color:var(--rule-2)}
.st-dev{color:var(--wine);border-color:var(--wine)}
.steps{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.steps li{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--rule)}
.steps .no{font-family:var(--serif);font-size:1.6rem;font-weight:900;color:var(--wine);line-height:1.2}
.steps b{display:block;font-size:1.05rem}
.steps span{display:block;font-size:.9rem;color:var(--ink-2);line-height:1.65}
.split .btn{margin-top:20px}

/* 案例 */
.case{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,56px);align-items:start}
.case-txt h3{font-size:1.6rem;font-weight:900;margin-bottom:12px}
.case-txt p{margin:0 0 12px;color:var(--ink-2)}
.case-txt .more-l{margin:22px 0 0}
.status{display:inline-flex;align-items:center;gap:8px;font-size:.88rem;font-weight:700;color:var(--sage-ink);margin-bottom:12px}
.status i{width:8px;height:8px;border-radius:50%;background-color:var(--sage)}
.facts{margin:0;border-top:2px solid var(--ink)}
.facts div{display:grid;grid-template-columns:84px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid var(--rule)}
.facts dt{font-family:var(--serif);font-weight:700;color:var(--wine)}
.facts dd{margin:0;color:var(--ink-2);font-size:.94rem;line-height:1.7}

/* 安全(深色) */
.dark{background-color:var(--dark);color:var(--on-dark);border-bottom:0}
.dark .head h2{color:var(--on-dark)}
.dark .head p{color:var(--on-dark-2)}
.sec-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(28px,4vw,56px);align-items:start}
.dark .frame{border-color:var(--rule-dark);box-shadow:none}
.dark .cap{color:var(--on-dark-2)}
.checks{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule-dark)}
.checks li{padding:12px 0;border-bottom:1px solid var(--rule-dark);color:var(--on-dark-2);font-size:.95rem;line-height:1.7}
.checks b{color:var(--on-dark)}
.sys{margin:18px 0 0;font-size:.9rem;color:var(--on-dark-2);line-height:1.9}
.sys b{color:var(--on-dark)}
.locks{display:grid;grid-template-columns:repeat(3,1fr);margin-top:clamp(40px,5vw,60px);border-top:1px solid var(--rule-dark)}
.lock{padding:18px 20px;border-bottom:1px solid var(--rule-dark);border-left:1px solid var(--rule-dark)}
.lock b{display:block;font-family:var(--serif);font-size:1.08rem;color:var(--on-dark)}
.lock span{display:block;font-size:.88rem;color:var(--on-dark-2);margin-top:2px;line-height:1.6}

/* 洽詢 */
.contact{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(28px,4vw,64px);align-items:start}
.contact h2{font-size:clamp(1.9rem,3.4vw,2.8rem);font-weight:900;line-height:1.25}
.contact p{margin:14px 0 0;color:var(--ink-2);font-size:1.05rem}
.cinfo{margin:0;border-top:2px solid var(--ink)}
.cinfo div{padding:13px 0;border-bottom:1px solid var(--rule)}
.cinfo dt{font-size:.84rem;font-weight:700;color:var(--wine);letter-spacing:.06em}
.cinfo dd{margin:2px 0 0;font-size:.98rem;line-height:1.6}
.foot{background-color:var(--dark);color:var(--on-dark-2);padding:30px 0 36px;font-size:.88rem}
.foot-in{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut);display:flex;flex-wrap:wrap;gap:12px 26px;align-items:center;justify-content:space-between}
.foot nav{display:flex;flex-wrap:wrap;gap:6px 18px}
.foot a:hover{color:var(--on-dark)}
.foot p{flex-basis:100%;margin:0;font-size:.82rem}

/* responsive */
@media(max-width:1100px){
  .links a{padding:.4em .5em;font-size:.9rem}
  .logo small{display:none}
  .mods{grid-template-columns:repeat(6,1fr)}
}
@media(max-width:960px){
  .links{display:none}
  .links.open{display:flex;flex-direction:column;align-items:stretch;position:absolute;top:100%;left:0;right:0;padding:10px var(--gut);background-color:var(--paper);border-bottom:1px solid var(--rule)}
  .links.open a{padding:.7em .4em}
  .links.open a.home{margin:4px 0 0}
  .burger{display:block}
  .nav .btn{display:none}
  .logo small{display:inline}
  .hero-top,.split,.case,.sec-grid,.contact,.groups{grid-template-columns:1fr}
  .rules{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr}
  .flow>div:nth-child(n+3){border-top:1px solid var(--rule)}
  .stats{grid-template-columns:1fr 1fr}
  .stats div:nth-child(3){padding-left:0;border-left:0}
  .locks{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .ftabs{grid-template-columns:minmax(0,1fr);gap:22px}
  .tablist{flex-direction:row;position:static;gap:8px;overflow-x:auto;border-top:0;padding-bottom:6px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}
  .tab{width:auto;flex:none;white-space:nowrap;border:1px solid var(--rule-2);border-radius:999px;padding:8px 14px;font-size:.92rem;scroll-snap-align:start}
  .tab svg{width:18px;height:18px}
  .tab.on{border-color:var(--wine)}
  .tp-txt{grid-template-columns:minmax(0,1fr)}
  .tp-txt h3,.tp-txt>p,.tp-txt .tags,.tp-txt .specs{grid-column:1;grid-row:auto}
  .tp-txt .specs{margin-top:18px}
  .tab .cnt{margin-left:4px}
  .ctabs .group ul{columns:1}
}
@media(max-width:640px){
  body{font-size:16px}
  .gal{margin-top:56px;padding-top:48px}
  .mods{grid-template-columns:repeat(4,1fr)}
  .mod{font-size:.82rem;padding:14px 4px 12px}
  .rules,.flow,.locks,.gal{grid-template-columns:1fr}
  .flow>div+div{border-top:1px solid var(--rule)}
  .stats b{font-size:1.8rem}
  .specs div,.facts div{grid-template-columns:1fr;gap:0}
  .hero h1{font-size:clamp(2.1rem,9.5vw,2.8rem)}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* 底色切換（導覽列右邊五個色塊；選擇記在 localStorage） */
:root[data-bg="white"]{--paper:#fbfbf9;--paper-2:#f1f1ee;--card:#ffffff;--nav-bg:rgba(251,251,249,.94)}
:root[data-bg="stone"]{--paper:#ebe9e4;--paper-2:#e0ddd6;--card:#f5f4f1;--nav-bg:rgba(235,233,228,.94)}
:root[data-bg="sage"]{--paper:#eef1ec;--paper-2:#e2e8e0;--card:#f7f9f5;--nav-bg:rgba(238,241,236,.94)}
:root[data-bg="blush"]{--paper:#f6eeea;--paper-2:#eedfd8;--card:#fbf6f3;--nav-bg:rgba(246,238,234,.94)}
.bgpick{position:relative}
.bgpick-btn{display:inline-flex;align-items:center;gap:8px;font:inherit;font-size:.88rem;color:var(--ink-2);background-color:transparent;border:1px solid var(--rule-2);border-radius:999px;padding:.42em .95em;cursor:pointer;white-space:nowrap}
.bgpick-btn:hover,.bgpick-btn[aria-expanded="true"]{border-color:var(--wine);color:var(--wine)}
.bgpick-btn i,.bgpick-panel i{display:inline-block;width:14px;height:14px;border-radius:50%;border:1px solid var(--rule-2);background-color:var(--paper)}
.bgpick-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:60;min-width:168px;padding:8px;background-color:var(--card);border:1px solid var(--rule);border-radius:10px;box-shadow:0 2px 4px rgba(31,27,23,.08),0 14px 30px -12px rgba(31,27,23,.35)}
.bgpick-panel[hidden]{display:none}
.bgpick-panel button{display:flex;align-items:center;gap:10px;width:100%;font:inherit;font-size:.9rem;color:var(--ink);background-color:transparent;border:0;border-radius:6px;padding:.5em .6em;cursor:pointer;text-align:left}
.bgpick-panel button:hover{background-color:var(--wine-soft)}
.bgpick-panel button[aria-pressed="true"]{color:var(--wine);font-weight:700}
.bgpick-panel button[aria-pressed="true"]::after{content:"✓";margin-left:auto}
.bgpick-panel button[data-bg="paper"] i{background-color:#f5f1e8}
.bgpick-panel button[data-bg="white"] i{background-color:#fbfbf9}
.bgpick-panel button[data-bg="stone"] i{background-color:#ebe9e4}
.bgpick-panel button[data-bg="sage"] i{background-color:#eef1ec}
.bgpick-panel button[data-bg="blush"] i{background-color:#f6eeea}
.studio-back{font-size:.86rem;color:var(--ink-3);white-space:nowrap}
.studio-back:hover{color:var(--wine)}
.links a.home{display:none}
@media (max-width:960px){.studio-back{display:none}.links.open a.home{display:block}.bgpick-btn{padding:.38em .75em;font-size:.82rem}}
@media (max-width:480px){.logo small{display:none}}