/* 产品详情(subnav/phero/gal/dark/works/hl/feat/weld/s9/fbcard/acc).源自原型 */
.subnav{position:sticky;top:56px;z-index:40;background:var(--surface);border-bottom:1px solid var(--line)}
.subnav .c{display:flex;align-items:center;gap:20px;height:46px;font-size:14px;overflow-x:auto;white-space:nowrap}
.subnav b{font-size:18px;font-weight:600}
.subnav .sp{flex:1}
.subnav a{color:var(--ink-2);height:100%;display:inline-flex;align-items:center}
.subnav a:not(.on):not(.btn):hover{color:var(--ink)}
.subnav a.on{color:var(--ink);font-weight:600;box-shadow:inset 0 -2px 0 var(--tab-line)}
.subnav a.btn{color:#fff;height:30px;padding:0 12px;font-size:13px;box-shadow:none}
.subnav .c::-webkit-scrollbar{display:none}
.phero{background:var(--surface-2);padding:28px 0 0}
.phero .c{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px}
.phero h1{font-size:26px;font-weight:600;line-height:1.2}
.phero .lead{color:var(--ink);font-size:16px;line-height:1.55;max-width:560px}
.phero .actions{display:flex;gap:12px;margin:22px 0 20px;flex-wrap:wrap;justify-content:center}
.phero .actions .btn{height:44px;min-width:122px;padding:0 20px;font-size:14px;border-radius:5px}
.gal{width:100%}
.gal .big{aspect-ratio:1;overflow:hidden}
.gal .big img{mix-blend-mode:multiply;width:100%;height:100%;object-fit:cover}
[data-theme="dark"] .gal .big img{mix-blend-mode:normal}
.gal .thumbs{display:flex;gap:8px;padding:10px 0;justify-content:center}
.gal .thumbs img{width:56px;height:56px;object-fit:cover;border-radius:6px;border:2px solid transparent;flex:none;cursor:pointer;mix-blend-mode:multiply}
.gal .thumbs img.on{border-color:var(--accent)}
.gal.hd .big img,.gal.hd .thumbs img{mix-blend-mode:normal}
@media(min-width:1024px){.phero{padding:60px 0 30px}.phero .c{flex-direction:row;text-align:left;align-items:center;gap:48px}.phero .txt{flex:0 0 385px;display:flex;flex-direction:column;align-items:flex-start;gap:10px}.phero .actions{justify-content:flex-start}.phero h1{font-size:40px;line-height:50px}.phero .lead{font-size:18px;line-height:28px}.gal{flex:1}.gal .thumbs{justify-content:flex-start}}
.dark{background:var(--dark);color:#fff}
.dark .sec h2{color:#fff}
.works{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:768px){.works{grid-template-columns:1fr 1fr}.works .wide{grid-column:span 2}}
.wk{position:relative;border-radius:var(--radius-s);overflow:hidden;aspect-ratio:1.3;background:#2a2521;display:block}
.wk img{width:100%;height:100%;object-fit:cover}
.wk .cap{position:absolute;left:0;right:0;bottom:0;background:#2a2521;color:#fff;padding:10px 14px;font-size:12px;display:flex;justify-content:space-between;gap:10px}
.wk .cap b{display:block}
.hl{padding:0 0 0 16px}
.hl h2{text-align:left;font-size:26px;font-weight:600;padding:20px 0;border-bottom:1px solid var(--line);margin-right:16px}
@media(min-width:768px){.hl h2{font-size:36px;line-height:46px}}
.hlcard{width:300px;display:flex;flex-direction:column;gap:5px}
.hlcard b{font-size:17px;font-weight:500;line-height:28px}
.hlcard span{font-size:14px;line-height:22px;color:var(--ink)}
.hlcard .pic{aspect-ratio:.8;overflow:hidden;background:var(--surface-2);margin-top:8px}
.hlcard .pic img{width:100%;height:100%;object-fit:cover}
.feat{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;padding:40px 16px 0}
.feat .eyebrow{color:var(--ink);font-size:16px;font-weight:400}
.feat h3{font-size:24px;font-weight:600;line-height:1.3}
.feat p{color:var(--ink);font-size:16px;line-height:1.6;max-width:520px}
.feat .pic{width:100%;max-width:640px;aspect-ratio:1.3;overflow:hidden;background:var(--surface-2);margin-top:8px}
/* 第 4 稿目录核心卖点要点 / Banner 眉题 / 技术参数页「核心参数」(原型 v16) */
.feat .fbul{margin:10px 0 0;padding:0;list-style:none;display:grid;gap:6px;font-size:14px;color:var(--ink-2)}
.feat .fbul li::before{content:"·";margin-right:6px;color:var(--accent)}
.phero .txt .eyebrow{display:block;margin-bottom:8px}
.weld-h.params-h{margin-top:24px}  /* 与 .weld-h 同时用,提高优先级(原型 L701 24px) */
.params-ul{margin:10px 0 0}
.params-note{margin-top:6px}
.feat .pic img{width:100%;height:100%;object-fit:cover}
@media(min-width:1024px){.feat{flex-direction:row;text-align:left;align-items:center;gap:60px;padding:70px 32px 0;max-width:1200px;margin:0 auto}.feat.alt{flex-direction:row-reverse}.feat .txt{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:10px}.feat h3{font-size:34px;line-height:42px}.feat .pic{flex:1.3;max-width:none;margin:0}}
.weld{display:grid;gap:8px}
.weld .row{display:grid;grid-template-columns:90px 1fr 60px;align-items:center;gap:10px;font-size:13px}
.weld .bar{height:10px;background:var(--surface-2);border-radius:5px;overflow:hidden}
.weld .bar i{display:block;height:100%;background:var(--accent);border-radius:5px}
.weld .v{text-align:right;font-weight:600;font-family:var(--mono)}
.s9{display:grid;gap:26px;margin-top:20px}
.s9 h3{font-size:16px;font-weight:600;padding-bottom:8px;border-bottom:1px solid var(--line-strong);margin-bottom:2px}
.s9 .r{display:flex;gap:16px;padding:9px 0;border-bottom:1px solid var(--line);font-size:13px}
.s9 .r span{flex:0 0 42%;color:var(--ink-2)}
.s9 .r b{font-weight:500;text-align:right;flex:1;white-space:pre-line}
.s9 .r b.na{color:var(--ink-3);font-weight:400}
@media(min-width:768px){.s9{grid-template-columns:1fr 1fr;column-gap:56px}}
.fbcard{background:var(--surface-2);border-radius:var(--radius-s);padding:26px 22px;text-align:center}
.fbcard h3{font-size:20px}
.fbcard p{color:var(--ink-2);margin:8px auto 16px;max-width:520px}
.acc{padding:0}
.acc .it{border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;cursor:pointer}
.acc .it>div{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.acc .it>div b{font-weight:500}
.acc .it p{color:var(--ink-2);margin-top:8px;display:none;font-size:13px;line-height:1.65}
.acc .it.open p{display:block}
.acc .it svg{flex:none;transition:transform .2s}
.acc .it.open svg{transform:rotate(180deg)}
[data-theme="dark"] .gal .big img{mix-blend-mode:normal}
[data-theme="dark"] .gal .thumbs img{mix-blend-mode:normal}
/* 原型行内样式转类 */
.weld-h{font-size:16px;margin-top:20px}
.weld-narrow{margin:12px 0 8px;max-width:640px}
.weld-ov{margin:16px 0 8px}
.spec-note{margin-top:20px}
.acc.pfaq-acc{margin-top:10px}  /* 型号 FAQ 列表(原型 L705 行内) */
.spec-note.acc-note{margin-top:12px}  /* 配件页页底说明(原型 L719 行内 12px) */
.spec-acts{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 10px}
.faq-c{max-width:820px}
.faq-more{margin-top:20px}
.phero-sum{font-size:14px;line-height:1.6}
.sec .sub.dim{color:#bbb}
.hl-scroll{padding-top:16px}
.wk-gap{height:48px}
.sec h2.left.mt{margin-top:34px}
.chip.chip-accent{background:var(--accent-soft);color:var(--accent-strong)}
.acc-scroll{margin-top:12px}
.pcard.acc-card{width:170px}
.acc-card .acc-nm{font-size:13px}
.pgrid.rel{margin-top:12px}
.rel-more{margin-top:14px}
.fb-wrap{max-width:760px}
.fb-gap{height:40px}