/* ======================================================================
   SD 卡速度等级速查 · 独立设计（摄影橙 + 炭灰 · 卡面标签隐喻）
   浅色 = 相纸暖白 + 橙色卡标；深色 = 炭灰暗房 + 亮橙
   ====================================================================== */
.sd{
  --ink:#23282e; --sub:#5d6670; --faint:#98a1ab;
  --bg:#f6f4f0; --card:#ffffff; --card2:#f1ede7; --line:#e2dbd0; --line2:#ece6dc;
  --pri:#ea580c; --pri-2:#f97316; --pri-soft:#ffefe3; --pri-ink:#9a3412;
  --char:#2b3138; --char-ink:#f8fafc;
  --ok:#15803d; --ok-soft:#e9f7ee;
  --warn:#b45309; --warn-soft:#fdf3e2;
  --red:#b42323; --red-soft:#fdecec;
  --r:14px;
  --shadow:0 1px 2px rgba(35,40,46,.05),0 10px 28px rgba(35,40,46,.08);
  color:var(--ink);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px; line-height:1.75;
  background:
    radial-gradient(880px 400px at 90% -120px, rgba(234,88,12,.10), transparent 60%),
    radial-gradient(700px 340px at -6% 130%, rgba(43,49,56,.07), transparent 60%),
    var(--bg);
  padding:0 16px 56px;
}
:root[data-theme="dark"] .sd{
  --ink:#e8e4dd; --sub:#a8a293; --faint:#75705f;
  --bg:#191b1e; --card:#22262b; --card2:#2a2f35; --line:#3a4048; --line2:#31373e;
  --pri:#fb923c; --pri-2:#fdba74; --pri-soft:rgba(251,146,60,.14); --pri-ink:#fed7aa;
  --char:#0f1215; --char-ink:#e5e7eb;
  --ok:#4ade80; --ok-soft:rgba(74,222,128,.12);
  --warn:#fbbf24; --warn-soft:rgba(251,191,36,.12);
  --red:#f87171; --red-soft:rgba(248,113,113,.12);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 12px 32px rgba(0,0,0,.4);
}
.sd *{box-sizing:border-box;}
.sd b{font-weight:700;}
.sd-wrap{max-width:1120px;margin:0 auto;}
.sd code,.sd pre,.sd-mono,input[type=number]{font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;}

/* ---------- 首屏：SD 卡卡面 Hero ---------- */
.sd-card{
  margin-top:22px;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);
  background:linear-gradient(135deg,var(--char) 0%,#3b424a 100%);
  border:1px solid rgba(255,255,255,.08);
  display:grid;grid-template-columns:1fr auto;gap:0;
}
:root[data-theme="dark"] .sd-card{background:linear-gradient(135deg,#171a1d,#262b31);}
.sd-card-body{padding:26px 28px 24px;}
.sd-card h1{margin:0 0 8px;font-size:clamp(24px,3.6vw,32px);font-weight:900;color:#fff;line-height:1.3;}
.sd-card h1 span{color:var(--pri-2);}
.sd-card p{margin:0;color:#aeb6bf;font-size:15px;max-width:720px;}
.sd-card p em{font-style:normal;color:#fdba74;font-weight:700;}
.sd-badge-pile{display:flex;flex-direction:column;gap:8px;padding:24px 22px;align-items:flex-end;}
.sd-badge{
  display:inline-flex;align-items:center;justify-content:center;min-width:58px;height:34px;
  padding:0 12px;border-radius:8px;font-weight:900;font-size:14px;letter-spacing:.03em;
  background:rgba(255,255,255,.08);color:#fdba74;border:1px solid rgba(253,186,116,.35);
}
.sd-badge.b1{background:var(--pri);color:#fff;border-color:var(--pri);}
:root[data-theme="dark"] .sd-badge.b1{color:#2b1200;}
@media (max-width:760px){.sd-card{grid-template-columns:1fr;}.sd-badge-pile{flex-direction:row;flex-wrap:wrap;padding:0 22px 20px;align-items:center;}}

/* ---------- 工作台 ---------- */
.sd-desk{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-top:20px;}
@media (max-width:900px){.sd-desk{grid-template-columns:1fr;}}
.sd-card2{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px 18px 16px;}
.sd-card2 h2{margin:0 0 4px;font-size:16px;font-weight:800;display:flex;align-items:center;gap:8px;}
.sd-card2 h2 .sd-num{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:7px;background:var(--pri);color:#fff;font-size:12px;font-weight:800;}
:root[data-theme="dark"] .sd-card2 h2 .sd-num{color:#2b1200;}
.sd-tip{font-size:12.5px;color:var(--sub);margin:0 0 10px;}
.sd-chips{display:flex;flex-wrap:wrap;gap:8px;}
.sd-chip{
  border:1px solid var(--line);background:var(--card2);color:var(--sub);
  border-radius:999px;padding:5px 14px;font-size:13px;cursor:pointer;font-weight:600;transition:all .15s;
}
.sd-chip:hover{border-color:var(--pri-2);color:var(--pri-ink);}
.sd-chip.on{background:var(--pri);border-color:var(--pri);color:#fff;}
:root[data-theme="dark"] .sd-chip.on{color:#2b1200;}
.sd-rec{margin-top:14px;border:1px dashed var(--pri);border-radius:12px;background:var(--pri-soft);padding:14px 16px;}
.sd-rec h3{margin:0 0 6px;font-size:15px;font-weight:900;color:var(--pri-ink);}
.sd-combo{font-size:19px;font-weight:900;color:var(--pri);letter-spacing:.01em;}
.sd-why{font-size:13.5px;color:var(--sub);margin:8px 0 0;}
.sd-why b{color:var(--ink);}
.sd-in{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--card2);color:var(--ink);font-size:14px;outline:none;transition:border-color .15s;}
.sd-in:focus{border-color:var(--pri-2);box-shadow:0 0 0 3px var(--pri-soft);}
.sd-btn{border:none;border-radius:10px;padding:9px 20px;font-size:14px;font-weight:800;cursor:pointer;transition:all .15s;}
.sd-btn-go{background:var(--pri);color:#fff;}
:root[data-theme="dark"] .sd-btn-go{color:#2b1200;}
.sd-btn-go:hover{background:var(--pri-2);}
.sd-btn-ghost{background:var(--card2);color:var(--pri-ink);border:1px solid var(--line);}
.sd-btn-ghost:hover{border-color:var(--pri-2);}
.sd-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px;}
.sd-msg{margin-top:10px;font-size:13px;min-height:20px;font-weight:600;}
.sd-msg.err{color:var(--red);}
.sd-msg.ok{color:var(--ok);}
.sd-bars{margin-top:12px;}
.sd-bar{display:grid;grid-template-columns:88px 1fr 66px;gap:10px;align-items:center;font-size:13px;margin:7px 0;}
.sd-bar .sd-lab{font-weight:700;color:var(--sub);}
.sd-track{height:12px;border-radius:6px;background:var(--card2);border:1px solid var(--line2);overflow:hidden;}
.sd-fill{height:100%;border-radius:6px;background:linear-gradient(90deg,var(--pri),var(--pri-2));transition:width .3s;}
.sd-fill.no{background:var(--faint);opacity:.45;}
.sd-bar .sd-val{text-align:right;color:var(--sub);}
.sd-bar .sd-val b{color:var(--pri-ink);}
.sd-note{margin-top:10px;font-size:12.5px;color:var(--warn);background:var(--warn-soft);border:1px solid var(--line2);border-radius:10px;padding:8px 12px;}

/* ---------- 等级对照表 ---------- */
.sd-tables{margin-top:22px;display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
@media (max-width:900px){.sd-tables{grid-template-columns:1fr;}}
.sd-tables table{width:100%;border-collapse:collapse;font-size:13px;}
.sd-tables th,.sd-tables td{border:1px solid var(--line);padding:7px 10px;text-align:left;}
.sd-tables th{background:var(--card2);font-weight:700;}
.sd-tag{display:inline-block;border-radius:6px;padding:1px 8px;font-size:12px;font-weight:800;background:var(--pri-soft);color:var(--pri-ink);}

/* ---------- FAQ ---------- */
.sd-faq{margin-top:34px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;box-shadow:var(--shadow);}
.sd-faq h2{margin:0 0 12px;font-size:19px;font-weight:900;}
.sd-faq h3{margin:18px 0 6px;font-size:15.5px;font-weight:800;color:var(--pri-ink);}
.sd-faq p{margin:0;color:var(--sub);font-size:14px;}
.sd-faq p b{color:var(--ink);}