/* ============================================================
   Site extras: language switch, quick sizing, selector tool,
   download cards, news cards, article layout.
   Shares the palette from style.css (:root).
   ============================================================ */

/* SECTION: language switch */
.lang-sw{display:inline-flex;align-items:center;gap:2px;border:1.5px solid rgba(255,255,255,.28);border-radius:999px;padding:2px;background:rgba(255,255,255,.06);flex:none}
.lang-sw a,.lang-sw span{font-size:.76rem;font-weight:800;letter-spacing:.04em;padding:.3rem .62rem;border-radius:999px;line-height:1.2;white-space:nowrap}
.lang-sw a{color:#cfe3e2;transition:background .2s,color .2s}
.lang-sw a:hover{background:rgba(255,255,255,.16);color:#fff}
.lang-sw .on{background:var(--red);color:#fff}

/* SECTION: shared field polish for new blocks */
.qs .field,.sel-panel .field{margin-bottom:0}
.field input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:26px;background:transparent;padding:0;border:none;cursor:pointer}
.field input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:999px;background:linear-gradient(90deg,var(--teal),var(--teal-bright))}
.field input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;margin-top:-7px;border-radius:50%;background:#fff;border:3px solid var(--red);box-shadow:0 2px 8px rgba(4,26,33,.3);transition:transform .15s}
.field input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.12)}
.field input[type=range]::-moz-range-track{height:6px;border-radius:999px;background:linear-gradient(90deg,var(--teal),var(--teal-bright))}
.field input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--red)}
.field input[type=range]:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:999px}

/* SECTION: quick sizing on home */
.qs{background:#fff;border:1px solid var(--line);border-radius:18px;padding:1.3rem;box-shadow:0 10px 30px rgba(6,42,51,.08);position:relative;overflow:hidden}
.qs::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--red),var(--amber) 45%,var(--teal-bright))}
.qs-row{display:grid;grid-template-columns:repeat(3,1fr) auto;gap:1rem;align-items:end}
.qs-act{min-width:140px}
.qs-act .btn{width:100%}
.qs-out{margin-top:1rem}
.qs-out:empty{display:none}
.qs-hint{font-size:.85rem;color:var(--steel);padding:.7rem .9rem;background:var(--foam);border-radius:10px;border:1px dashed var(--line)}
.qs-list{display:grid;gap:.6rem}
.qs-item{display:flex;flex-wrap:wrap;gap:.5rem .9rem;align-items:center;justify-content:space-between;padding:.75rem .9rem;border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:10px;background:var(--foam);animation:qsIn .35s ease both}
@keyframes qsIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.qs-item b{font-size:.98rem;color:var(--deep2)}
.qs-item .qs-meta{display:flex;flex-wrap:wrap;gap:.35rem;font-size:.74rem;color:var(--steel)}
.qs-item .qs-meta span{background:#fff;border:1px solid var(--line);border-radius:6px;padding:.16rem .45rem;font-weight:700}
.qs-item .btn{padding:.45rem .85rem;font-size:.78rem;min-height:36px}
.qs-more{margin-top:.7rem;font-size:.84rem}
.qs-more a{color:var(--teal);font-weight:700}
.qs-more a:hover{color:var(--red)}

/* SECTION: selector tool */
.sel-layout{display:grid;grid-template-columns:310px 1fr;gap:1.6rem;align-items:start}
.sel-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:1.2rem;position:sticky;top:calc(var(--nav-h) + 16px);box-shadow:0 10px 30px rgba(6,42,51,.07);display:grid;gap:.85rem;max-height:calc(100vh - var(--nav-h) - 32px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--teal) var(--foam)}
.sel-panel::-webkit-scrollbar{width:8px}
.sel-panel::-webkit-scrollbar-track{background:var(--foam);border-radius:8px}
.sel-panel::-webkit-scrollbar-thumb{background:var(--teal);border-radius:8px}
.sel-panel::-webkit-scrollbar-thumb:hover{background:var(--red)}
.sel-panel h3{font-size:1rem;font-weight:800;padding-bottom:.6rem;border-bottom:2px solid var(--foam);position:relative}
.sel-panel h3::after{content:"";position:absolute;left:0;bottom:-2px;width:46px;height:2px;background:var(--red)}
.sel-panel .field label{display:flex;justify-content:space-between;align-items:baseline;gap:.5rem}
.sel-panel .field label b{color:var(--red);font-size:.9rem}
.sel-checks{display:grid;gap:.5rem;padding:.7rem .8rem;background:var(--foam);border-radius:10px;border:1px solid var(--line)}
.ck{display:flex;align-items:center;gap:.55rem;font-size:.85rem;font-weight:600;color:var(--deep2);cursor:pointer;min-height:32px}
.ck input{width:18px;height:18px;accent-color:var(--teal);cursor:pointer;flex:none}
.sel-btns{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}
.sel-btns .btn{padding:.6rem .5rem;font-size:.82rem}
.sel-note{font-size:.75rem;color:var(--steel);line-height:1.5}
.sel-note a{color:var(--teal);font-weight:700}
.sel-result{min-width:0}
.sel-head h2{margin-bottom:.3rem}
.sel-count{font-size:.8rem;font-weight:700;color:#cfe3e2;background:rgba(255,255,255,.12);border-radius:999px;padding:.3rem .8rem}
.sel-pick{margin-top:1rem}
.sel-pick:empty{display:none}
.pick-card{background:linear-gradient(135deg,var(--deep2),var(--teal));color:#fff;border-radius:16px;padding:1.2rem 1.3rem;display:grid;gap:.7rem;box-shadow:var(--shadow);animation:qsIn .35s ease both}
.pick-card h3{color:#fff;font-size:1.15rem}
.pick-card .pick-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.7rem}
.pick-card .pick-grid div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:.6rem .7rem}
.pick-card .pick-grid span{display:block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:#a9cfcd}
.pick-card .pick-grid b{font-size:.98rem}
.pick-card .pick-act{display:flex;flex-wrap:wrap;gap:.6rem}
.pick-card .btn-line{background:#fff;border-color:#fff}
.btn-pick{border:1.5px solid var(--teal);background:#fff;color:var(--teal);border-radius:8px;padding:.35rem .7rem;font-size:.76rem;font-weight:800;min-height:34px;transition:all .18s}
.btn-pick:hover{background:var(--teal);color:#fff}
.btn-pick.on{background:var(--red);border-color:var(--red);color:#fff}
tr.sel-row-on{background:rgba(14,111,122,.08)}
tr.sel-row-on td:first-child{color:var(--red)}

/* SECTION: download cards */
.dl-card{display:flex;align-items:center;gap:.9rem;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem 1.1rem;box-shadow:0 6px 18px rgba(6,42,51,.06);transition:transform .22s,box-shadow .22s;min-width:0}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.dl-card.hide{display:none}
.dl-card>div{flex:1;min-width:0}
.dl-card b{display:block;font-size:.94rem;line-height:1.3}
.dl-card span{display:block;font-size:.75rem;color:var(--steel);margin-top:.2rem}
.dl-ico{flex:none;width:46px;height:46px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;letter-spacing:.04em;color:#fff;background:linear-gradient(135deg,var(--red),var(--red-deep))}
.dl-card .btn{padding:.55rem .9rem;font-size:.8rem;min-height:38px;flex:none}

/* SECTION: news cards */
.ncard{display:flex;flex-direction:column;gap:.5rem;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1.15rem 1.2rem;box-shadow:0 6px 18px rgba(6,42,51,.06);transition:transform .22s,box-shadow .22s,border-color .22s;min-width:0}
.ncard:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--teal)}
.ncard.hide{display:none}
.ncat{align-self:flex-start;font-size:.66rem;font-weight:800;letter-spacing:.12em;color:var(--red);background:rgba(200,16,46,.08);border-radius:6px;padding:.22rem .55rem}
.ncard h3{font-size:1.02rem;font-weight:800;line-height:1.35}
.ncard p{font-size:.85rem;color:var(--steel);flex:1}
.ndate{font-size:.74rem;color:var(--steel);font-family:Consolas,Menlo,monospace;padding-top:.5rem;border-top:1px solid var(--line)}

/* SECTION: article layout */
.art-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:2rem;align-items:start}
.art-body{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(1.3rem,3vw,2.4rem);box-shadow:0 8px 24px rgba(6,42,51,.06);min-width:0}
.art-body h2{font-size:clamp(1.15rem,2.2vw,1.5rem);margin:1.8rem 0 .7rem;padding-left:.75rem;border-left:4px solid var(--red)}
.art-body h2:first-child{margin-top:0}
.art-body p{font-size:.95rem;color:#26424b;margin-bottom:.9rem;line-height:1.85}
.art-body ul{margin:0 0 1rem 1.1rem;display:grid;gap:.5rem}
.art-body li{font-size:.93rem;color:#26424b;line-height:1.75}
.art-body li::marker{color:var(--teal)}
.art-body a{color:var(--teal);font-weight:700;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}
.art-body a:hover{color:var(--red)}
.art-cta{margin-top:1.8rem;background:linear-gradient(135deg,var(--foam),#fff);border:1.5px solid var(--line);border-left:5px solid var(--teal);border-radius:14px;padding:1.2rem 1.3rem}
.art-cta b{display:block;font-size:1rem;margin-bottom:.4rem;color:var(--deep2)}
.art-cta p{font-size:.9rem;margin-bottom:.9rem}
.art-side{display:grid;gap:1rem;position:sticky;top:calc(var(--nav-h) + 16px)}
.art-side .cbox p{font-weight:400;color:var(--steel);font-size:.86rem;line-height:1.6}
.art-side .cbox a{color:var(--teal);font-weight:700;font-size:.86rem}
.art-side .cbox a:hover{color:var(--red)}
.art-side .cbox .btn{color:#fff}

/* SECTION: footer wrapper */
footer.site-foot{background:var(--deep);color:#a9cfcd;padding:3rem 0 1.4rem;font-size:.86rem}
footer.site-foot h4{color:#fff;font-size:.8rem;letter-spacing:.14em;margin-bottom:.8rem}
footer.site-foot ul{list-style:none;display:grid;gap:.45rem}
footer.site-foot a:hover{color:var(--amber)}
footer.site-foot .fgrid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:2rem}
footer.site-foot .fbottom{margin-top:2.2rem;padding-top:1.2rem;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;justify-content:space-between;font-size:.76rem}

/* SECTION: responsive */
@media (max-width:1120px){
  .sel-layout{grid-template-columns:1fr}
  .sel-panel{position:static;max-height:none;overflow:visible}
  .art-layout{grid-template-columns:1fr}
  .art-side{position:static}
  .qs-row{grid-template-columns:1fr 1fr}
  .qs-act{grid-column:1 / -1}
  footer.site-foot .fgrid{grid-template-columns:1fr 1fr}
  .lang-sw{order:3}
}
@media (max-width:640px){
  .qs-row{grid-template-columns:1fr}
  .sel-btns{grid-template-columns:1fr}
  footer.site-foot .fgrid{grid-template-columns:1fr}
  .dl-card{flex-wrap:wrap}
  .dl-card .btn{width:100%}
  .pick-card .pick-act .btn{flex:1}
  .brand .bt{font-size:.82rem}
  .brand .bt small{font-size:.55rem;letter-spacing:.18em}
}
@media (prefers-reduced-motion:reduce){
  .qs-item,.pick-card{animation:none}
}
/* SECTION: universal unit system */
.unit-switch{display:flex;align-items:center;gap:.4rem;margin:0 0 .6rem;flex-wrap:wrap}
.unit-switch .u-label{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);margin-right:.3rem}
.unit-switch button{border:1.5px solid var(--line);background:#fff;color:var(--steel);border-radius:999px;padding:.3rem .8rem;font-size:.76rem;font-weight:700;font-family:inherit;cursor:pointer;transition:all .18s}
.unit-switch button.on{background:var(--teal);border-color:var(--teal);color:#fff}
.unit-switch button:hover{border-color:var(--teal);color:var(--teal)}
.unit-switch button.on:hover{color:#fff}
table.spec th.u-two{line-height:1.25}
table.spec th.u-two .u-bar{display:block;font-weight:800}
table.spec th.u-two .u-psi{display:block;font-size:.68rem;font-weight:600;color:var(--steel);opacity:.85}

/* ===== 首页认证徽章：分两行（船级社规范覆盖 / 已持有证书） ===== */
.trust .wrap{display:block}
.trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem .9rem}
.trust-row + .trust-row{margin-top:.6rem;padding-top:.6rem;border-top:1px dashed rgba(14,111,122,.22)}
.trust-row .tl{flex:none;min-width:9.5em}
.trust-row .chips{flex:1 1 auto}
@media (max-width:640px){
  .trust-row{gap:.4rem .5rem}
  .trust-row .tl{min-width:100%}
  .chip{font-size:.72rem;padding:.3rem .66rem}
}

/* ── 船级社 logo 行（取代纯文字 chip）── */
.trust-row .socs{flex:1 1 auto;display:flex;flex-wrap:wrap;align-items:center;gap:.55rem 1.15rem}
.soc{display:inline-flex;align-items:center;height:38px}
.soc img{max-height:38px;max-width:112px;width:auto;height:auto;object-fit:contain;display:block;opacity:.9;transition:opacity .2s ease}
.soc--t{height:50px}
.soc--t img{max-height:50px;max-width:68px}
.soc:hover img{opacity:1}
/* 窄屏：9 个 logo 宽度差异大（ClassNK 极宽、BV 极窄），flex 换行必然参差不齐，
   改为等分栅格 —— 平板 5 列（5+4），手机 3 列（正好 3×3），每格居中，永远对称。
   注意必须同时收 img 的 max-height，否则图片会溢出 26px 的盒子互相压住。 */
@media (max-width:900px){
  .trust-row .socs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.7rem .4rem;width:100%;justify-items:center}
  .trust-row .soc,.trust-row .soc--t{height:auto;min-height:32px;width:100%;justify-content:center}
  .trust-row .soc img,.trust-row .soc--t img{max-height:32px;max-width:100%}
}
@media (max-width:640px){
  .trust-row .socs{grid-template-columns:repeat(3,minmax(0,1fr));gap:.65rem .3rem}
  .trust-row .soc,.trust-row .soc--t{min-height:28px}
  .trust-row .soc img,.trust-row .soc--t img{max-height:28px}
}

/* ── 证书徽标（图片版，取代 chip）── */
.trust-row .badges{flex:1 1 auto;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem .7rem}
.badge{display:inline-flex;align-items:center;height:38px;text-decoration:none;opacity:.96;transition:opacity .2s ease}
.badge:hover{opacity:1}
.badge img{max-height:38px;max-width:150px;width:auto;height:auto;display:block}
@media (max-width:640px){
  /* 5 枚徽标按 28px 高合计约 300px，390 屏一行放得下，不再出现孤零零的第二行 */
  .trust-row .badges{justify-content:center;gap:.45rem .4rem;width:100%}
  .badge{height:28px}
  .badge img{max-height:28px}
}