/* tk-theme.css — 全站统一深色皮（与首页 index.html 同一套令牌）
 * 令牌：底 #0B1219 · 面板 #151F2B · 卡 #1A2533 · 文字 #E8EEF4 · 次要 #8FA3B6 · 强调 #3DDCFF · CTA #3DDCFF
 * 板块色由 tk-shell 写进 --tk-zone。圆角只有三档：14（卡）/ 8（钮、输入）/ 6（芯片），胶囊 999。
 * 只用发丝线分层，发光只在悬停与当前态；动效只动 transform / opacity，曲线 cubic-bezier(.16,1,.3,1) .3s。
 * 页面接入：html.tk-theme 由 js/tk-shell.js（data-theme）加上；页面自己的变量映射到 --tk-* 即完成换皮。
 */
:root{
  --tk-bg:#08090B; --tk-bg2:#0E1013; --tk-panel:#12151A; --tk-card:#171A20; --tk-card2:#1D2129;
  --tk-line:rgba(255,255,255,.08); --tk-line2:rgba(255,255,255,.18); --tk-line3:rgba(255,255,255,.3);
  --tk-text:#EEF1F4; --tk-text2:#C8CED5; --tk-muted:#98A2AC; --tk-dim:#646C75;
  --tk-acc:#3DDCFF; --tk-acc2:#3DDCFF; --tk-glow:#0E6F86;
  --tk-ok:#5FD0A0; --tk-warn:#F5A623; --tk-bad:#FF6B6B; --tk-info:#3DDCFF;
  --tk-zone:#3DDCFF;
  /* 元素配色（2026-09-07 用户定：底色仍是黑白灰，元素靠首页那六种主题色区分，不用 CPK 彩虹）
     C 灰 · H 白 · O 粉红(游戏) · N 蓝(复习) · Cl 绿(有机) · S/P 琥珀(原理) · Br/I 紫(图鉴) · F/碱金属 青(结构) · 其他金属 紫
     同一张图里两种粒子不许撞色，撞了按 --tk-el-rot* 顺序取未用过的那个 */
  --tk-el-C:#7D858E; --tk-el-H:#F2F4F6; --tk-el-O:#E85D75; --tk-el-N:#2196F3; --tk-el-Cl:#66BB6A; --tk-el-S:#F5A623; --tk-el-P:#C8801A;
  --tk-el-Br:#9B59B6; --tk-el-I:#7E4A96; --tk-el-F:#3DDCFF; --tk-el-alkali:#3DDCFF; --tk-el-metal:#9B59B6; --tk-el-noble:#CFD4D9; --tk-el-semi:#7D858E;
  --tk-el-rot1:#3DDCFF; --tk-el-rot2:#9B59B6; --tk-el-rot3:#F5A623; --tk-el-rot4:#2196F3; --tk-el-rot5:#66BB6A; --tk-el-rot6:#E85D75;
  --tk-r:14px; --tk-r-sm:8px; --tk-r-xs:6px;
  --tk-ease:cubic-bezier(.16,1,.3,1);
  --tk-sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --tk-mono:'JetBrains Mono',Consolas,'SF Mono',Menlo,monospace;
  --tk-shadow:0 18px 40px -26px rgba(0,0,0,.9);
  --tk-zone-soft:color-mix(in oklab,var(--tk-zone) 18%,transparent);
  --tk-zone-line:color-mix(in oklab,var(--tk-zone) 55%,transparent);
  --tk-zone-glow:0 0 22px color-mix(in oklab,var(--tk-zone) 45%,transparent);
}
html.tk-theme{color-scheme:dark;background:var(--tk-bg)}
html.tk-theme body{background:var(--tk-bg);color:var(--tk-text);font-family:var(--tk-sans);-webkit-font-smoothing:antialiased}
html.tk-theme ::selection{background:color-mix(in oklab,var(--tk-acc) 40%,transparent)}
html.tk-theme :focus-visible{outline:2px solid var(--tk-acc);outline-offset:2px}
html.tk-theme ::-webkit-scrollbar{width:10px;height:10px}
html.tk-theme ::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:999px;border:2px solid var(--tk-bg)}
html.tk-theme ::-webkit-scrollbar-track{background:transparent}
/* 首页同款背景辉光：固定一层，页面内容 z-index 高于它即可 */
.tk-bgglow{position:fixed;inset:0;z-index:-1;pointer-events:none;background:
  radial-gradient(60% 40% at 20% 0%,color-mix(in oklab,var(--tk-zone) 16%,transparent) 0%,transparent 70%),
  radial-gradient(50% 35% at 90% 30%,color-mix(in oklab,var(--tk-glow) 14%,transparent) 0%,transparent 70%),
  linear-gradient(180deg,#08090B 0%,#0E1013 100%)}
/* 原画背景层：全屏应用页把板块原画压暗垫在最底下 */
.tk-bgart{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.tk-bgart img{width:100%;height:100%;object-fit:cover;object-position:center 30%;opacity:.55;filter:saturate(1);transform:scale(1.04);animation:tkKv 40s ease-in-out infinite alternate}
.tk-bgart::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,9,11,.35),rgba(8,9,11,.5) 55%,rgba(8,9,11,.9))}

/* ── 页头横幅（tk-shell data-hero 生成） ── */
.tk-hero{position:relative;overflow:hidden;background:var(--tk-bg2);border-bottom:1px solid var(--tk-line);min-height:var(--tk-hero-h,420px);display:flex;align-items:flex-end}
.tk-hero.s{--tk-hero-h:300px}.tk-hero.m{--tk-hero-h:440px}.tk-hero.l{--tk-hero-h:580px}
.tk-hero-bg{position:absolute;inset:0}
.tk-hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 30%;opacity:0;filter:saturate(1.08);transform:scale(1.06);transition:opacity .9s ease}
.tk-hero.ready .tk-hero-bg img{opacity:1;animation:tkKv 26s ease-in-out infinite alternate}
@keyframes tkKv{from{transform:scale(1.06) translateY(0)}to{transform:scale(1.14) translateY(-2.5%)}}
.tk-hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,9,11,.9) 0%,rgba(8,9,11,.62) 34%,rgba(8,9,11,.12) 62%,rgba(8,9,11,0) 100%),linear-gradient(180deg,rgba(8,9,11,.28) 0%,rgba(8,9,11,0) 30%,rgba(8,9,11,0) 62%,var(--tk-bg) 100%)}
.tk-hero-in{position:relative;z-index:2;width:100%;max-width:1180px;margin:0 auto;padding:clamp(22px,4vw,36px) clamp(16px,4vw,28px) clamp(26px,3.6vw,40px);display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.tk-hero-in>*{max-width:100%}
.tk-hero-title{margin:4px 0 0;font-size:clamp(2rem,4.8vw,3.6rem);font-weight:900;letter-spacing:.02em;line-height:1.08;
  background:linear-gradient(180deg,#fff 0%,#E4EEF8 50%,color-mix(in oklab,var(--tk-zone) 70%,white) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 6px 24px color-mix(in oklab,var(--tk-zone) 45%,transparent)) drop-shadow(0 2px 0 rgba(0,0,0,.7))}
.tk-hero-lede{margin:0;max-width:52ch;color:#D6E1EC;font-size:clamp(1rem,1.5vw,1.18rem);line-height:1.65;text-shadow:0 2px 14px rgba(0,0,0,.75)}
.tk-hero-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px}
.tk-hero-tags span{font-size:12.5px;font-weight:700;color:#D6E6F5;background:rgba(8,9,11,.55);border:1px solid rgba(255,255,255,.22);border-radius:5px;padding:4px 10px;line-height:1.4;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.tk-hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.tk-hero-actions:empty{display:none}
/* 主角立绘：容器比横幅高 1.5 倍、头顶齐横幅顶，只露上 2/3 身；腰以下由容器遮罩渐隐进横幅底部的暗色，不是被硬边切掉。
   光影：::before 板块色逆光晕（在人后面）；::after 用人形蒙版做正片叠底——顶部染一点板块色、腰以下逐级压暗，像沉进阴影；
   .rim 用「人形 − 右下偏移的人形」抠出左上边缘，涂板块色再 screen，就是一道朝着标题那侧的边缘光。 */
.tk-hero-spot{position:absolute;right:clamp(0px,4vw,72px);top:calc(var(--tk-hero-h) * -.05);height:calc(var(--tk-hero-h) * 1.5);aspect-ratio:2/3;max-width:46%;z-index:1;pointer-events:none;isolation:isolate;opacity:0;transform:translateY(2%);transition:opacity .9s ease,transform 1.1s var(--tk-ease);
  -webkit-mask-image:linear-gradient(180deg,#000 0,#000 40%,rgba(0,0,0,.7) 52%,rgba(0,0,0,.25) 62%,transparent 69%);mask-image:linear-gradient(180deg,#000 0,#000 40%,rgba(0,0,0,.7) 52%,rgba(0,0,0,.25) 62%,transparent 69%)}
.tk-hero-spot img{display:block;width:100%;height:100%;object-fit:contain;object-position:top;filter:saturate(.94) contrast(1.04) drop-shadow(0 14px 30px rgba(0,0,0,.5))}
.tk-hero-spot::before{content:"";position:absolute;inset:-8% -20% 0;z-index:-1;background:radial-gradient(ellipse 46% 40% at 52% 28%,color-mix(in oklab,var(--tk-zone) 36%,transparent),transparent 72%)}
.tk-hero-spot::after{content:"";position:absolute;inset:0;mix-blend-mode:multiply;
  background:linear-gradient(180deg,color-mix(in oklab,var(--tk-zone) 26%,#fff) 0%,#fff 15%,#fff 38%,#96a2ae 56%,#3c4854 65%,#141c25 72%);
  -webkit-mask:var(--spot) center/100% 100% no-repeat;mask:var(--spot) center/100% 100% no-repeat}
.tk-hero-spot .rim{display:none;position:absolute;inset:0;z-index:1;background:color-mix(in oklab,var(--tk-zone) 72%,#fff);mix-blend-mode:screen;opacity:.8;
  -webkit-mask-image:var(--spot),var(--spot);-webkit-mask-size:100% 100%,100% 100%;-webkit-mask-repeat:no-repeat,no-repeat;-webkit-mask-position:0 0,5px 3px;-webkit-mask-composite:source-out;
  mask-image:var(--spot),var(--spot);mask-size:100% 100%;mask-repeat:no-repeat;mask-position:0 0,5px 3px;mask-composite:subtract}
@supports (mask-composite:subtract) or (-webkit-mask-composite:source-out){.tk-hero-spot .rim{display:block}}
.tk-hero.has-spot .tk-hero-spot{opacity:1;transform:none}
.tk-hero.has-spot .tk-hero-in{padding-right:clamp(200px,40%,560px)}
/* 名牌：立绘那侧的竖排「荧 / LUMEN」，吃当前板块色，点开图鉴里的小传。
   位置贴横幅右下角——立绘的蒙版到这一带已经渐隐进底色，压不到脸；标题那侧有 padding-right 让开，也压不到字。 */
.tk-spot-name{position:absolute;right:clamp(8px,2vw,26px);bottom:16px;z-index:3;display:none;text-align:center;text-decoration:none;
  padding:9px 7px 11px;border-radius:6px;background:rgba(8,9,11,.6);
  box-shadow:0 0 0 1px color-mix(in oklab,var(--tk-zone) 45%,transparent),0 0 0 3px #000;
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  transition:background .25s,box-shadow .25s}
.tk-hero.has-spot .tk-spot-name{display:block}
.tk-spot-name:hover{background:rgba(8,9,11,.82);box-shadow:0 0 0 1px var(--tk-zone),0 0 0 3px #000,var(--tk-zone-glow)}
.tk-spot-name b{display:block;font-size:clamp(20px,2vw,26px);font-weight:900;line-height:1;letter-spacing:.04em;color:var(--tk-zone);
  padding-bottom:7px;border-bottom:2px solid color-mix(in oklab,var(--tk-zone) 65%,transparent);
  text-shadow:0 0 16px color-mix(in oklab,var(--tk-zone) 60%,transparent),0 2px 0 rgba(0,0,0,.8)}
.tk-spot-name i{display:block;margin:8px auto 0;writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--tk-mono);font-style:normal;font-size:10px;font-weight:800;letter-spacing:.14em;color:#CFD4D9}
.tk-hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--tk-mono);font-size:12px;font-weight:800;letter-spacing:.3em;color:var(--tk-zone);text-shadow:0 0 18px color-mix(in oklab,var(--tk-zone) 60%,transparent)}
.tk-hero-eyebrow::before{content:"";width:26px;height:2px;background:var(--tk-zone);box-shadow:0 0 12px var(--tk-zone)}
.tk-hero-title.has-art .txt{display:none}
.tk-title-art{display:block;width:auto;height:auto;max-height:clamp(64px,9vw,132px);max-width:100%;object-fit:contain;object-position:left center;filter:drop-shadow(0 10px 30px color-mix(in oklab,var(--tk-zone) 55%,transparent)) drop-shadow(0 2px 0 rgba(0,0,0,.7))}
.tk-hero-tags span.code{font-family:var(--tk-mono);color:var(--tk-acc);letter-spacing:.06em}
@media (max-width:640px){
  .tk-hero.m{--tk-hero-h:300px}.tk-hero.l{--tk-hero-h:360px}.tk-hero.s{--tk-hero-h:220px}
  .tk-hero-veil{background:linear-gradient(180deg,rgba(8,9,11,.25) 0%,rgba(8,9,11,.15) 35%,rgba(8,9,11,.72) 68%,var(--tk-bg) 100%)}
  .tk-hero-in{padding-bottom:18px}
  .tk-hero-spot{right:-12%;top:calc(var(--tk-hero-h) * .02);height:calc(var(--tk-hero-h) * 1.28);max-width:none;
    -webkit-mask-image:linear-gradient(180deg,#000 0,#000 38%,rgba(0,0,0,.55) 54%,transparent 74%);mask-image:linear-gradient(180deg,#000 0,#000 38%,rgba(0,0,0,.55) 54%,transparent 74%)}
  .tk-hero.has-spot .tk-hero-spot{opacity:.9}
  .tk-hero-spot::after{background:linear-gradient(180deg,color-mix(in oklab,var(--tk-zone) 26%,#fff) 0%,#fff 14%,#e6ebf0 30%,#7d8995 50%,#2c3742 64%,#141c25 74%)}
  .tk-hero.has-spot .tk-hero-in{padding-right:16px}
  .tk-spot-name{right:auto;left:10px;top:10px;bottom:auto;width:32px;height:32px;padding:0;border-radius:50%;
    align-items:center;justify-content:center}
  .tk-hero.has-spot .tk-spot-name{display:flex}
  .tk-spot-name b{font-size:15px;padding:0;border-bottom:0}
  .tk-spot-name i{display:none}
  .tk-title-art{max-height:clamp(44px,12vw,72px);height:auto}
  .tk-hero-lede{font-size:.9rem;-webkit-line-clamp:3;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}
}

/* ── 页内段落标题：眉标 + 900 字重 + 板块色短线，和首页货架头一个样 ── */
html.tk-theme h1,html.tk-theme h2,html.tk-theme h3{font-weight:900;letter-spacing:.01em}
.tk-sec{display:flex;flex-direction:column;gap:6px;margin:0 0 18px}
.tk-sec .k{font-family:var(--tk-mono);font-size:11px;font-weight:800;letter-spacing:.3em;color:var(--tk-zone);text-shadow:0 0 14px color-mix(in oklab,var(--tk-zone) 55%,transparent)}
.tk-sec h1,.tk-sec h2,.tk-sec h3{margin:0;font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:900;line-height:1.15;color:var(--tk-text)}
.tk-sec .u{width:56px;height:3px;border-radius:2px;background:linear-gradient(90deg,var(--tk-zone),color-mix(in oklab,var(--tk-zone) 20%,transparent));box-shadow:0 0 12px color-mix(in oklab,var(--tk-zone) 60%,transparent);margin-top:6px}
.tk-sec p{margin:4px 0 0;color:var(--tk-muted);font-size:.95rem}
/* 海报卡：大号单色编号 + 眩光 + 悬停抬起 */
.tk-card.hover{position:relative;overflow:hidden}
.tk-card.hover::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(240px 240px at var(--gx,50%) var(--gy,50%),rgba(255,255,255,.16),transparent 60%);opacity:0;transition:opacity .35s;z-index:3}
.tk-card.hover:hover::after{opacity:1}
.tk-poster-n{position:absolute;right:10px;bottom:-6px;font-family:var(--tk-mono);font-size:clamp(3rem,5vw,4.2rem);font-weight:900;line-height:1;letter-spacing:-.04em;color:var(--tk-zone);opacity:.13;pointer-events:none;z-index:0;transition:opacity .35s,transform .5s var(--tk-ease)}
.tk-card.hover:hover .tk-poster-n{opacity:.32;transform:translateY(-4px)}
.tk-card.hover>:not(.tk-poster-n){position:relative;z-index:1}
.tk-tag{display:inline-flex;align-items:center;font-size:12px;font-weight:700;color:#D5DBE1;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:3px 8px;line-height:1.4}
.tk-tag.code{font-family:var(--tk-mono);color:var(--tk-acc)}
.tk-tag.zone{color:var(--tk-zone);background:color-mix(in oklab,var(--tk-zone) 12%,transparent);border-color:color-mix(in oklab,var(--tk-zone) 35%,transparent)}
.tk-corner{position:absolute;right:12px;top:12px;font-family:var(--tk-mono);font-size:11px;font-weight:800;letter-spacing:.12em;color:#0B1219;background:#E8EEF4;padding:4px 8px;border-radius:4px;z-index:2}

/* ── 通用组件 ── */
.tk-eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--tk-mono);font-size:12px;font-weight:800;letter-spacing:.3em;color:var(--tk-zone);text-shadow:0 0 18px color-mix(in oklab,var(--tk-zone) 60%,transparent)}
.tk-eyebrow::before{content:"";width:26px;height:2px;background:var(--tk-zone);box-shadow:0 0 12px var(--tk-zone)}
.tk-kicker{font-family:var(--tk-mono);font-size:11px;font-weight:800;letter-spacing:.2em;color:var(--tk-muted);text-transform:uppercase}
.tk-chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--tk-mono);font-weight:800;font-size:11px;letter-spacing:.18em;color:#fff;background:rgba(255,255,255,.06);border:1px solid var(--tk-line2);padding:5px 10px;border-radius:var(--tk-r-xs);line-height:1;white-space:nowrap}
.tk-chip.zone{background:color-mix(in oklab,var(--tk-zone) 55%,#0B1219);border-color:color-mix(in oklab,var(--tk-zone) 70%,white);box-shadow:0 0 18px color-mix(in oklab,var(--tk-zone) 45%,transparent)}
.tk-chip.ok{color:var(--tk-ok);border-color:color-mix(in oklab,var(--tk-ok) 50%,transparent)}
.tk-chip.warn{color:var(--tk-warn);border-color:color-mix(in oklab,var(--tk-warn) 50%,transparent)}
.tk-chip.bad{color:var(--tk-bad);border-color:color-mix(in oklab,var(--tk-bad) 50%,transparent)}

.tk-card{position:relative;background:var(--tk-card);border:1px solid var(--tk-line2);border-radius:var(--tk-r);box-shadow:var(--tk-shadow);color:var(--tk-text)}
.tk-card.hover{transition:transform .3s var(--tk-ease),border-color .3s,box-shadow .3s var(--tk-ease);cursor:pointer}
.tk-card.hover:hover,.tk-card.hover:focus-visible{transform:translateY(-3px);border-color:color-mix(in oklab,var(--tk-zone) 75%,white);box-shadow:0 26px 60px -24px color-mix(in oklab,var(--tk-zone) 65%,transparent),0 0 0 1px color-mix(in oklab,var(--tk-zone) 45%,transparent)}
.tk-card.on{border-color:color-mix(in oklab,var(--tk-zone) 75%,white);box-shadow:0 0 0 1px color-mix(in oklab,var(--tk-zone) 45%,transparent),var(--tk-zone-glow)}
.tk-card.soft{background:var(--tk-panel);box-shadow:none}
.tk-panel{background:var(--tk-panel);border:1px solid var(--tk-line);border-radius:var(--tk-r)}

.tk-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:38px;padding:0 16px;border-radius:var(--tk-r-sm);border:1px solid var(--tk-line2);background:rgba(255,255,255,.06);color:var(--tk-text);font:700 14px/1 var(--tk-sans);cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background .2s,border-color .2s,transform .3s var(--tk-ease),box-shadow .3s var(--tk-ease)}
.tk-btn:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.tk-btn:active{transform:translateY(0)}
.tk-btn:disabled,.tk-btn[aria-disabled="true"]{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none!important}
.tk-btn.primary{background:linear-gradient(135deg,var(--tk-acc),#0E6F86);border-color:transparent;color:#fff;box-shadow:0 8px 24px -10px var(--tk-acc)}
.tk-btn.primary:hover{box-shadow:0 14px 30px -10px var(--tk-acc)}
.tk-btn.cta{background:linear-gradient(180deg,#fff,#D9DEE3);border-color:transparent;color:#0B0C0E;font-weight:900;box-shadow:0 8px 24px -8px rgba(255,255,255,.4)}
.tk-btn.cta:hover{box-shadow:0 14px 30px -8px rgba(255,255,255,.55)}
.tk-btn.zone{background:var(--tk-zone);border-color:transparent;color:#0B1219;box-shadow:0 8px 24px -10px var(--tk-zone)}
.tk-btn.zone:hover{box-shadow:0 14px 30px -10px var(--tk-zone)}
.tk-btn.ghost{background:transparent;border-color:transparent;color:var(--tk-muted)}
.tk-btn.ghost:hover{color:var(--tk-text);background:rgba(255,255,255,.06)}
.tk-btn.outline{background:transparent;border-color:var(--tk-zone-line);color:var(--tk-zone)}
.tk-btn.outline:hover{background:var(--tk-zone-soft)}
.tk-btn.sm{height:30px;padding:0 11px;font-size:12.5px}
.tk-btn.lg{height:46px;padding:0 22px;font-size:15px;border-radius:10px}
.tk-btn.icon{width:38px;padding:0}
.tk-btn.sm.icon{width:30px}

.tk-input,.tk-select,.tk-textarea{width:100%;box-sizing:border-box;background:rgba(255,255,255,.05);border:1px solid var(--tk-line2);border-radius:var(--tk-r-sm);color:var(--tk-text);font:500 14px/1.4 var(--tk-sans);padding:9px 12px;outline:none;transition:border-color .2s,box-shadow .2s}
.tk-input::placeholder,.tk-textarea::placeholder{color:var(--tk-dim)}
.tk-input:focus,.tk-select:focus,.tk-textarea:focus{border-color:var(--tk-acc);box-shadow:0 0 0 3px color-mix(in oklab,var(--tk-acc) 25%,transparent)}
.tk-select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--tk-muted) 50%),linear-gradient(135deg,var(--tk-muted) 50%,transparent 50%);background-position:calc(100% - 16px) 50%,calc(100% - 11px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:32px}
.tk-textarea{min-height:90px;resize:vertical}

.tk-progress{height:4px;background:rgba(255,255,255,.12);border-radius:2px;overflow:hidden}
.tk-progress i{display:block;height:100%;width:0;background:var(--tk-zone);box-shadow:0 0 12px var(--tk-zone);border-radius:2px;transition:width .35s var(--tk-ease)}

.tk-sec-head{display:flex;align-items:baseline;gap:14px;margin:0 0 14px}
.tk-sec-head h2,.tk-sec-head h3{margin:0;font-size:clamp(1.15rem,2vw,1.45rem);font-weight:900;color:var(--tk-text)}
.tk-sec-head span{font-family:var(--tk-mono);font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--tk-muted)}
.tk-hr{border:0;border-top:1px solid var(--tk-line);margin:18px 0}

.tk-modal-veil{position:fixed;inset:0;z-index:99800;background:rgba(6,10,14,.72);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px}
.tk-modal{width:min(560px,100%);max-height:min(86vh,900px);overflow:auto;background:var(--tk-panel);border:1px solid var(--tk-line2);border-radius:var(--tk-r);box-shadow:0 30px 80px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.03);padding:22px}
.tk-modal h2,.tk-modal h3{margin:0 0 10px;font-weight:900}

.tk-toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);opacity:0;z-index:99850;background:var(--tk-panel);border:1px solid var(--tk-line2);border-left:3px solid var(--tk-zone);border-radius:10px;padding:10px 16px;color:var(--tk-text);font-size:14px;font-weight:700;box-shadow:var(--tk-shadow);transition:opacity .3s,transform .3s var(--tk-ease);pointer-events:none;max-width:min(92vw,520px)}
.tk-toast.show{opacity:1;transform:translate(-50%,0)}

.tk-table{width:100%;border-collapse:collapse;font-size:14px}
.tk-table th{font-family:var(--tk-mono);font-size:11px;letter-spacing:.14em;color:var(--tk-muted);text-align:left;padding:8px 10px;border-bottom:1px solid var(--tk-line2)}
.tk-table td{padding:9px 10px;border-bottom:1px solid var(--tk-line)}
.tk-mono{font-family:var(--tk-mono)}
.tk-muted{color:var(--tk-muted)}
.tk-num{font-family:var(--tk-mono);font-variant-numeric:tabular-nums}

/* 键位提示（复习类页面） */
.tk-kbd{display:inline-block;font-family:var(--tk-mono);font-size:11px;font-weight:700;color:var(--tk-text2);background:rgba(255,255,255,.06);border:1px solid var(--tk-line2);border-bottom-width:2px;border-radius:5px;padding:2px 6px;line-height:1.3}

@media (prefers-reduced-motion:reduce){
  .tk-hero-bg img,.tk-card.hover,.tk-btn,.tk-progress i,.tk-toast{transition:none!important}
  .tk-hero-bg img,.tk-bgart img{animation:none!important;transform:none!important}
}

/* 页内大标题毛笔字图 (data-tart, 图在 assets/pages/_titles/<key>.png; 缺图时文字照常) */
.has-tart{position:relative}
.has-tart>.tk-tart-txt{display:none}
.tk-tart{display:block;width:auto;height:auto;max-height:1.5em;max-width:100%;object-fit:contain;object-position:left center;filter:drop-shadow(0 6px 18px color-mix(in oklab,var(--tk-zone,#3DDCFF) 45%,transparent))}
.has-tart.tart-inline>.tk-tart{display:inline-block;vertical-align:-.4em}
.has-tart.tart-center>.tk-tart{margin:0 auto;object-position:center}
.tk-sec h2.has-tart>.tk-tart{max-height:1.6em;height:auto}
.tart-sub{font-size:.62em;font-weight:600;opacity:.72;margin-left:.5em;letter-spacing:.02em}

/* ── 漫画风层（2026-09-07）：全站黑白灰 + 板块单色。网点（screentone）、集中线、墨面按钮；只用伪元素与 background-image，不改任何布局 ── */
html.tk-theme body::after{content:"";position:fixed;inset:0;z-index:2147483000;pointer-events:none;opacity:.06;
  background-image:radial-gradient(circle,#fff 0 .8px,transparent 1.3px);background-size:5px 5px}
/* 横幅：右侧网点渐隐（在立绘后面）+ 以立绘头部为焦点的集中线 */
.tk-hero-veil::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(circle,rgba(255,255,255,.75) 0 1px,transparent 1.7px);background-size:7px 7px;
  -webkit-mask-image:radial-gradient(70% 110% at 100% 100%,#000 0,rgba(0,0,0,.45) 40%,transparent 72%);mask-image:radial-gradient(70% 110% at 100% 100%,#000 0,rgba(0,0,0,.45) 40%,transparent 72%)}
.tk-hero-veil::after{content:"";position:absolute;inset:-20%;pointer-events:none;opacity:.32;
  background:repeating-conic-gradient(from 0deg at 76% 34%,rgba(255,255,255,.55) 0deg .35deg,transparent .35deg 2.9deg);
  -webkit-mask-image:radial-gradient(60% 70% at 76% 34%,transparent 26%,rgba(0,0,0,.7) 55%,#000 80%);mask-image:radial-gradient(60% 70% at 76% 34%,transparent 26%,rgba(0,0,0,.7) 55%,#000 80%)}
.tk-hero-title{-webkit-text-stroke:.35px rgba(0,0,0,.35)}
/* 段落标题的板块色短线改成笔锋 */
.tk-sec .u{height:4px;border-radius:0;clip-path:polygon(0 40%,100% 0,100% 60%,0 100%)}
/* 墨面按钮与徽记：底色上压一层细网点 */
.tk-btn.primary{background:radial-gradient(circle,rgba(255,255,255,.22) 0 .6px,transparent 1.1px) 0 0/4px 4px,linear-gradient(135deg,var(--tk-acc),var(--tk-glow))}
.tk-btn.zone{background:radial-gradient(circle,rgba(0,0,0,.2) 0 .6px,transparent 1.1px) 0 0/4px 4px,var(--tk-zone)}
.tk-btn.cta{background:radial-gradient(circle,rgba(0,0,0,.12) 0 .6px,transparent 1.1px) 0 0/4px 4px,linear-gradient(180deg,#fff,#D9DEE3)}
.tk-chip.zone{background-image:radial-gradient(circle,rgba(255,255,255,.2) 0 .5px,transparent 1px);background-size:4px 4px}
.tk-progress i{background:radial-gradient(circle,rgba(0,0,0,.25) 0 .6px,transparent 1.1px) 0 0/4px 4px,var(--tk-zone)}
/* 当前卡：板块色描边外再加一圈黑墨线，像漫画分格 */
.tk-card.on{box-shadow:0 0 0 1px color-mix(in oklab,var(--tk-zone) 45%,transparent),0 0 0 3px #000,var(--tk-zone-glow)}
/* 各页共用的小立绘（登录/结算 spot-*）还是旧的彩色 2.5D 图，先统一压成灰阶 + 板块色边缘光，等单色版出图再换 */
html.tk-theme img[src*="_shared/spot-"]{filter:grayscale(1) contrast(1.1) drop-shadow(0 0 18px color-mix(in oklab,var(--tk-zone) 55%,transparent))}
/* ══ 账号弹窗（由 js/tk-auth.js 建：登录 / 注册 / 找回 / 密保问答 / 游客提示）══
   全部选择器锁在 #tk-auth-modal 内，不会污染任何页面；tk-auth.js 在页面没引 tk-theme.css 时会自己补一条 link。
   皮：黑底 #08090B + 双描边分格（白发丝内线 / 4px 黑墨 / 白发丝外线）+ 网点标题条 + 等宽眉标；主钮吃 --tk-zone。 */
#tk-auth-modal{position:fixed;inset:0;z-index:99860}  /* 压过 .tk-modal-veil(99800)，但让开贴纸弹出层(99870)：登录失败时 frown 要能看见 */
#tk-auth-modal .tk-auth-veil{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;
  background:rgba(4,5,7,.84);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
#tk-auth-modal .tk-auth-panel{position:relative;display:flex;width:min(760px,100%);max-height:min(88vh,880px);overflow:hidden;
  background:#08090B;border-radius:4px;color:var(--tk-text,#EEF1F4);font-family:var(--tk-sans,system-ui,sans-serif);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.85),0 0 0 4px #000,0 0 0 5px rgba(255,255,255,.5),0 40px 90px -34px rgba(0,0,0,.95)}
/* 荧：登录这一步也有她在。窄屏收起（≤900px） */
#tk-auth-modal .tk-auth-art{position:relative;flex:0 0 236px;overflow:hidden;background:#0B0D10;
  box-shadow:inset -1px 0 0 rgba(255,255,255,.24)}
#tk-auth-modal .tk-auth-art::before{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.4;
  background-image:radial-gradient(circle,rgba(255,255,255,.7) 0 1px,transparent 1.7px);background-size:7px 7px;
  -webkit-mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.5) 55%,transparent 88%);mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.5) 55%,transparent 88%)}
#tk-auth-modal .tk-auth-art::after{content:"";position:absolute;left:-40%;bottom:2%;width:180%;height:64%;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 42% 44% at 50% 50%,color-mix(in oklab,var(--tk-zone,#3DDCFF) 34%,transparent),transparent 70%)}
#tk-auth-modal .tk-auth-art img{position:absolute;left:50%;bottom:0;z-index:1;width:132%;transform:translateX(-50%);
  -webkit-mask-image:linear-gradient(180deg,#000 0,#000 76%,transparent 98%);mask-image:linear-gradient(180deg,#000 0,#000 76%,transparent 98%)}
/* 空出来的上半格放她的名牌，和横幅上的 .tk-spot-name 一个写法 */
#tk-auth-modal .tk-auth-sig{position:absolute;left:0;right:0;top:26px;z-index:3;text-align:center;pointer-events:none}
#tk-auth-modal .tk-auth-sig b{display:block;font-size:26px;font-weight:900;line-height:1;letter-spacing:.04em;color:var(--tk-zone,#3DDCFF);
  text-shadow:0 0 16px color-mix(in oklab,var(--tk-zone,#3DDCFF) 60%,transparent),0 2px 0 rgba(0,0,0,.8)}
#tk-auth-modal .tk-auth-sig i{display:block;margin-top:9px;font-family:var(--tk-mono,monospace);font-style:normal;font-size:10px;
  font-weight:800;letter-spacing:.34em;text-indent:.34em;color:#98A2AC}
#tk-auth-modal button,#tk-auth-modal input,#tk-auth-modal select,#tk-auth-modal label,
#tk-auth-modal form,#tk-auth-modal img,#tk-auth-modal div,#tk-auth-modal span{
  margin:0;box-sizing:border-box;font-family:inherit;letter-spacing:normal;text-transform:none;float:none}
#tk-auth-modal .tk-auth-main{flex:1 1 auto;min-width:0;overflow-y:auto;padding:24px 26px 22px;text-align:left}
#tk-auth-modal .tk-auth-head{position:relative;margin:-24px -26px 18px;padding:15px 26px 13px;
  background:radial-gradient(circle,rgba(255,255,255,.15) 0 .9px,transparent 1.5px) 0 0/5px 5px,#0E1117;
  box-shadow:inset 0 -1px 0 rgba(255,255,255,.2)}
#tk-auth-modal .tk-auth-eyebrow{display:block;font-family:var(--tk-mono,monospace);font-size:11px;font-weight:800;letter-spacing:.3em;
  color:var(--tk-zone,#3DDCFF);text-shadow:0 0 14px color-mix(in oklab,var(--tk-zone,#3DDCFF) 55%,transparent)}
#tk-auth-modal .tk-auth-title{margin-top:7px;font-size:1.22rem;font-weight:900;letter-spacing:.02em;line-height:1.2;color:#fff}
#tk-auth-modal .tk-auth-x{position:absolute;top:9px;right:10px;z-index:6;width:30px;height:30px;padding:0;line-height:1;
  background:#000;border:1px solid rgba(255,255,255,.38);border-radius:4px;color:#C8CED5;font-size:1.15rem;cursor:pointer;font-family:inherit;
  transition:color .2s,border-color .2s}
#tk-auth-modal .tk-auth-x:hover{color:#fff;border-color:var(--tk-zone,#3DDCFF)}
#tk-auth-modal .tk-auth-tabs{display:flex;margin:0 0 15px;box-shadow:inset 0 -1px 0 rgba(255,255,255,.18)}
#tk-auth-modal .tk-atab{flex:1;text-align:center;padding:9px 4px;cursor:pointer;-webkit-user-select:none;user-select:none;
  font-family:var(--tk-mono,monospace);font-size:12px;font-weight:800;letter-spacing:.22em;color:#8A939C;
  border-bottom:2px solid transparent;transition:color .2s,border-color .2s}
#tk-auth-modal .tk-atab:hover{color:#D7DDE3}
#tk-auth-modal .tk-atab.active{color:var(--tk-zone,#3DDCFF);border-bottom-color:var(--tk-zone,#3DDCFF)}
#tk-auth-modal .tk-auth-msg{margin:0 0 12px;padding:9px 12px;border-radius:4px;font-size:.85rem;line-height:1.55;
  background:rgba(255,107,107,.12);color:#FF9C9C;box-shadow:inset 0 0 0 1px rgba(255,107,107,.55),0 0 0 2px #000}
#tk-auth-modal .tk-auth-msg.ok{background:rgba(95,208,160,.12);color:#9BE9C6;box-shadow:inset 0 0 0 1px rgba(95,208,160,.55),0 0 0 2px #000}
#tk-auth-modal .tk-auth-field{margin-bottom:13px}
#tk-auth-modal .tk-auth-lab{display:block;margin-bottom:5px;font-family:var(--tk-mono,monospace);font-size:10.5px;font-weight:800;
  letter-spacing:.16em;color:#8A939C}
#tk-auth-modal .tk-auth-hint{margin-top:4px;font-size:.74rem;color:#646C75}
#tk-auth-modal .tk-auth-grid{display:none;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:13px}
#tk-auth-modal .tk-input,#tk-auth-modal .tk-select{background:#0B0D10;border-color:rgba(255,255,255,.26);border-radius:4px;font-size:.93rem}
#tk-auth-modal .tk-input:focus,#tk-auth-modal .tk-select:focus{border-color:var(--tk-zone,#3DDCFF);
  box-shadow:0 0 0 2px #000,0 0 0 3px color-mix(in oklab,var(--tk-zone,#3DDCFF) 70%,transparent)}
#tk-auth-modal .tk-btn{border-radius:4px}
/* 主钮＝板块色墨面压网点；次钮＝描边式；两者都不用站内的 .zone / .outline 修饰类，免得撞上页面自己的同名类 */
#tk-auth-modal .tk-auth-go{width:100%;height:44px;font-size:.98rem;font-weight:900;letter-spacing:.08em;
  border-color:transparent;color:#08090B;
  background:radial-gradient(circle,rgba(0,0,0,.2) 0 .6px,transparent 1.1px) 0 0/4px 4px,var(--tk-zone,#3DDCFF);
  box-shadow:0 0 0 2px #000,0 0 0 3px rgba(255,255,255,.5)}
#tk-auth-modal .tk-auth-go:hover{background:radial-gradient(circle,rgba(0,0,0,.2) 0 .6px,transparent 1.1px) 0 0/4px 4px,var(--tk-zone,#3DDCFF);
  box-shadow:0 0 0 2px #000,0 0 0 3px #fff,0 12px 28px -14px var(--tk-zone,#3DDCFF)}
#tk-auth-modal .tk-auth-alt{width:100%;height:40px;margin-top:10px;background:transparent;
  border-color:color-mix(in oklab,var(--tk-zone,#3DDCFF) 55%,transparent);color:var(--tk-zone,#3DDCFF);box-shadow:0 0 0 2px #000}
#tk-auth-modal .tk-auth-alt:hover{background:color-mix(in oklab,var(--tk-zone,#3DDCFF) 16%,transparent)}
#tk-auth-modal .tk-auth-link{width:100%;height:34px;margin-top:8px;background:transparent;border-color:transparent;
  color:var(--tk-muted,#98A2AC);font-size:.85rem;font-weight:700}
#tk-auth-modal .tk-auth-link:hover{background:rgba(255,255,255,.06);color:var(--tk-text,#EEF1F4)}
#tk-auth-modal .tk-auth-box{margin-bottom:14px;padding:14px 15px;border-radius:4px;background:#0B0D10;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 0 0 2px #000}
#tk-auth-modal .tk-auth-box:last-child{margin-bottom:0}
#tk-auth-modal .tk-auth-boxk{display:block;margin:0 0 11px;font-family:var(--tk-mono,monospace);font-size:11px;font-weight:800;
  letter-spacing:.22em;color:var(--tk-zone,#3DDCFF)}
#tk-auth-modal .tk-auth-qtext{margin-bottom:10px;font-size:.88rem;line-height:1.55;color:#D7DDE3}
#tk-auth-modal .tk-auth-note{margin-top:16px;padding:12px 14px;border-radius:4px;background:#0B0D10;font-size:.8rem;line-height:1.65;color:#B6BEC6;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16),0 0 0 2px #000}
@media (max-width:900px){
  #tk-auth-modal .tk-auth-art{display:none}
  #tk-auth-modal .tk-auth-panel{width:min(430px,100%)}
}
@media (max-width:640px){
  #tk-auth-modal .tk-auth-veil{padding:12px}
  #tk-auth-modal .tk-auth-main{padding:20px 17px 18px}
  #tk-auth-modal .tk-auth-head{margin:-20px -17px 15px;padding:13px 17px 11px}
  #tk-auth-modal .tk-auth-title{font-size:1.08rem}
}
@media (prefers-reduced-motion:reduce){#tk-auth-modal .tk-atab,#tk-auth-modal .tk-input,#tk-auth-modal .tk-select{transition:none!important}}

@media print{html.tk-theme body::after,.tk-hero-veil::before,.tk-hero-veil::after{display:none}}
@media (max-width:640px){.tk-hero-veil::after{opacity:.22}}