/* 洛语拼豆工坊 · 展示首页（独立样式，不引工作台 style.css）
   风格：Editorial / magazine —— 手作图鉴式策展。
   色板沿用项目既有 token；字体为候选栈 + 现有中文回退（见 docs/19 §3 override）。
   禁止：紫/靛渐变、居中 Hero + 等宽卡片墙、emoji 图标、transition:all。 */
:root{
  --paper:#FAF8F5; --surface:#FFFFFF;
  --ink:#22252C; --ink-2:#6B7280;
  --accent:#F2643C; --accent-deep:#C94422; --accent-soft:#FFF1EC;
  --line:#E6E8EC;
  --shadow:0 0 0 1px rgba(20,24,35,.05),0 1px 2px rgba(20,24,35,.05),0 8px 24px rgba(20,24,35,.04);
  --shadow-hover:0 0 0 1px rgba(20,24,35,.08),0 2px 6px rgba(20,24,35,.07),0 14px 34px rgba(20,24,35,.07);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"DM Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.7 var(--font-sans)}
h1,h2,h3{text-wrap:balance;margin:0;font-family:var(--font-serif);font-weight:700;letter-spacing:-.01em}
p,li,figcaption,dd{text-wrap:pretty}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--accent-deep);outline-offset:3px}
.mono,.eyebrow,.hero-proof dt,.step-no,.work-meta,.param-line,.chip-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{width:min(1360px,calc(100% - 96px));margin:0 auto}
.skip-link{position:absolute;left:-9999px;top:0;z-index:99;background:var(--ink);color:#fff;padding:12px 18px;border-radius:0 0 10px 0}
.skip-link:focus{left:0}
[hidden]{display:none!important}

/* ── 顶栏 ─────────────────────────────────────────── */
.site-head{position:sticky;top:0;z-index:30;background:var(--paper);border-bottom:1px solid var(--line)}
.head-inner{width:min(1360px,calc(100% - 96px));margin:0 auto;min-height:70px;display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto}
.brand img{border-radius:10px}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt b{font:700 16px/1.2 var(--font-sans);letter-spacing:.01em}
.brand-txt small{margin-top:3px;font:9px/1.2 var(--font-mono);letter-spacing:.14em;color:var(--ink-2)}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:18px}
.main-nav a{position:relative;padding:8px 0;font-size:14px;color:var(--ink-2);transition-property:color;transition-duration:150ms;transition-timing-function:ease-out}
.main-nav a:hover{color:var(--accent-deep)}
.main-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;background:var(--accent);transition-property:right;transition-duration:180ms;transition-timing-function:ease-out}
.main-nav a:hover::after{right:0}
.main-nav .nav-login{display:none}
.head-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.btn-quiet,.btn-key,.btn-text,.btn-lg,.chip,.tierchip,.menu-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;border-radius:10px;border:1px solid transparent;
  font:600 14px/1 var(--font-sans);
  transition-property:transform,background-color,color,border-color,box-shadow;
  transition-duration:150ms;transition-timing-function:ease-out}
.btn-quiet{padding:0 16px;color:var(--ink);border-color:var(--line);background:transparent}
.btn-quiet:hover{border-color:var(--accent);color:var(--accent-deep);background:var(--accent-soft)}
.btn-key{padding:0 20px;background:var(--accent);color:#1B1B1B;border-color:var(--accent)}
.btn-key:hover{background:#E4552F;border-color:#E4552F}
.btn-lg{min-height:52px;padding:0 26px;font-size:15px;border-radius:12px}
.btn-lg svg,.btn-key svg{width:18px;height:18px;flex:0 0 auto}
.btn-key:active,.btn-quiet:active,.chip:active,.tierchip:active,.menu-btn:active{transform:scale(.96)}
.btn-text{padding:0 6px;color:var(--ink-2);background:transparent}
.btn-text:hover{color:var(--accent-deep)}
.menu-btn{display:none;width:44px;height:44px;padding:0;border-color:var(--line);background:transparent}
.menu-btn svg{width:20px;height:20px}
.acc-menu{position:relative}
.acc-menu summary{list-style:none;display:inline-flex;align-items:center;gap:6px;min-height:44px;
  padding:0 10px;border:1px solid var(--line);border-radius:10px;background:transparent;font-size:13px;
  transition-property:border-color,color;transition-duration:150ms;transition-timing-function:ease-out}
.acc-menu summary::-webkit-details-marker{display:none}
.acc-menu summary:hover{border-color:var(--accent);color:var(--accent-deep)}
.acc-menu summary svg{width:14px;height:14px}
.acc-pop{position:absolute;right:0;top:calc(100% + 8px);min-width:152px;padding:6px;z-index:40;
  background:var(--surface);border-radius:12px;box-shadow:var(--shadow-hover)}
.acc-pop a,.acc-pop button{display:block;width:100%;min-height:40px;padding:10px 12px;text-align:left;
  border:0;border-radius:8px;background:transparent;font-size:13px}
.acc-pop a:hover,.acc-pop button:hover{background:var(--accent-soft);color:var(--accent-deep)}
/* 已登录账户区 */
.acc-bal{font:12px/1 var(--font-mono);color:var(--accent-deep);background:var(--accent-soft);border-radius:999px;padding:7px 11px;white-space:nowrap}
.acc-bal.is-zero{color:var(--ink-2);background:#F1F2F4}
.acc-name{font-size:13px;color:var(--ink-2);max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ── Hero ─────────────────────────────────────────── */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:center;min-height:min(760px,88vh);padding:64px 0 88px}
.hero-copy{grid-column:2 / span 6;position:relative;z-index:2}
.hero-visual{grid-column:8 / span 5;position:relative;z-index:1;translate:0 -26px}
.eyebrow{margin:0 0 20px;font:11px/1.4 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent-deep)}
.slash{color:var(--line);margin:0 6px}
h1{font-size:clamp(42px,5vw,72px);line-height:1.16;letter-spacing:-.03em}
h1 em{font-style:normal;color:var(--accent-deep);position:relative}
h1 em::after{content:"";position:absolute;left:2px;right:2px;bottom:5px;height:9px;background:var(--accent-soft);z-index:-1}
.lede{margin:26px 0 0;max-width:33em;font-size:16px;line-height:1.85;color:var(--ink-2)}
.hero-actions{display:flex;align-items:center;gap:20px;margin-top:36px;flex-wrap:wrap}
.hero-proof{display:flex;gap:0;margin:52px 0 0;padding:0;border-top:1px solid var(--line);max-width:460px}
.hero-proof div{flex:1;padding:16px 0 0;border-right:1px solid var(--line)}
.hero-proof div+div{padding-left:22px}
.hero-proof div:last-child{border-right:0}
.hero-proof dt{font-size:26px;font-weight:600;line-height:1;color:var(--accent-deep)}
.hero-proof dd{margin:7px 0 0;font-size:12px;color:var(--ink-2);letter-spacing:.04em}
.hero-dots{position:absolute;inset:-52px -70px 44px 52px;z-index:0;
  background-image:radial-gradient(circle,rgba(242,100,60,.19) 1.2px,transparent 1.2px);
  background-size:18px 18px;pointer-events:none}
.compare{position:relative;z-index:1;margin:0;aspect-ratio:1/1;border-radius:20px;overflow:hidden;
  background:var(--accent-soft);box-shadow:var(--shadow-hover)}
.compare img{width:100%;height:100%;object-fit:cover;outline:1px solid rgba(0,0,0,.10);outline-offset:-1px}
.compare-base{image-rendering:pixelated}
.compare-top{position:absolute;inset:0;clip-path:inset(0 0 0 var(--pos,48%));
  transition-property:clip-path;transition-duration:100ms;transition-timing-function:ease-out}
.compare-tag{position:absolute;bottom:14px;z-index:3;padding:6px 11px;border-radius:999px;
  background:rgba(255,255,255,.92);font:11px/1 var(--font-mono);letter-spacing:.04em;color:var(--ink)}
.tag-left{left:14px}.tag-right{right:14px}
.compare-rule{position:absolute;top:0;bottom:0;left:var(--pos,48%);width:2px;background:var(--ink);z-index:4;
  transform:translateX(-1px);transition-property:left;transition-duration:100ms;transition-timing-function:ease-out}
.compare-rule span{position:absolute;top:50%;left:50%;width:30px;height:30px;border-radius:50%;
  background:var(--surface);border:2px solid var(--ink);transform:translate(-50%,-50%);box-shadow:var(--shadow)}
.compare-rule span::before,.compare-rule span::after{content:"";position:absolute;top:50%;width:6px;height:1.5px;background:var(--ink)}
.compare-rule span::before{left:6px;transform:translateY(-50%)}
.compare-rule span::after{right:6px;transform:translateY(-50%)}
.compare-range{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize;z-index:5}
.hero-param{position:absolute;left:-52px;bottom:64px;z-index:3;display:flex;align-items:baseline;gap:8px;
  background:var(--surface);border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-hover)}
.hero-param .param-line{width:18px;height:2px;background:var(--accent);align-self:center;margin-right:4px}
.hero-param b{font:600 15px/1 var(--font-mono);letter-spacing:.02em}
.hero-param small{font-size:11px;color:var(--ink-2)}
.hero-cap{margin:16px 0 0 22px;font-size:12px;color:var(--ink-2)}

/* ── 通用章节 ─────────────────────────────────────── */
.gallery,.tiers,.how,.about{padding:104px 0;border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:44px}
.sec-head h2{font-size:clamp(32px,3.6vw,50px);line-height:1.25}
.sec-lede{margin:18px 0 0;max-width:40em;color:var(--ink-2);font-size:15px;line-height:1.85}
.sec-head-split{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:end}
.sec-head-split .sec-lede{margin:0}

/* 站点公告 + 图鉴排序（docs/20 B/D）：贴顶通栏，不是居中弹窗 */
.site-notice{position:relative;z-index:31;display:flex;align-items:center;justify-content:center;
  gap:12px;padding:9px 20px;background:var(--ink);color:#fff;font-size:13px;
  line-height:1.6;text-align:center}
.site-notice[hidden]{display:none}
.notice-tag{flex:0 0 auto;font:11px/1 var(--font-mono);letter-spacing:.08em;
  border:1px solid rgba(255,255,255,.5);border-radius:999px;padding:4px 9px}
.notice-text{min-width:0}
.gallery-tools{display:flex;flex-wrap:wrap;align-items:flex-start;
  justify-content:space-between;gap:16px;margin:0 0 40px}
.gallery-tools .filters{margin:0;flex:1 1 auto}
.sort-switch{display:flex;flex:0 0 auto;border:1px solid var(--line);
  border-radius:10px;overflow:hidden}
.sortchip{min-height:42px;padding:0 14px;border:0;border-radius:0;
  background:transparent;color:var(--ink-2);font-size:12px;white-space:nowrap}
.sortchip+.sortchip{border-left:1px solid var(--line)}
.sortchip[aria-pressed="true"]{background:var(--ink);color:#fff;font-weight:600}
.work-pin{position:absolute;top:8px;left:8px;z-index:2;background:var(--accent-deep);
  color:#fff;font:10px/1 var(--font-mono);letter-spacing:.06em;border-radius:4px;
  padding:5px 7px}
/* 位置编号只对登录的管理员显示，访客看到的仍是干净图鉴 */
.work-index{display:none;position:absolute;bottom:8px;left:8px;z-index:2;
  background:rgba(34,37,44,.86);color:#fff;border-radius:4px;
  padding:4px 7px;font:11px/1 var(--font-mono);letter-spacing:.06em;
  font-variant-numeric:tabular-nums}
body.is-admin .work-index{display:block}

/* 作品图鉴 */
.filters{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 40px}
.chip{min-height:42px;padding:0 18px;border-color:var(--line);background:transparent;color:var(--ink-2);font-weight:500}
.chip:hover{border-color:var(--accent);color:var(--accent-deep)}
.chip[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-deep);font-weight:700}
.chip[aria-pressed="true"]::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.works{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;grid-auto-flow:dense}
.work{grid-column:span 4;margin:0;background:var(--surface);border-radius:18px;padding:10px;box-shadow:var(--shadow);
  transition-property:transform,box-shadow;transition-duration:180ms;transition-timing-function:ease-out}
.work:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.work.span-wide{grid-column:span 5}
.work.span-tall{grid-column:span 3}
.work:nth-child(4n+2){margin-top:22px}
.work:nth-child(4n+3){margin-top:-14px}
.work-media{position:relative;aspect-ratio:4/3;border-radius:8px;overflow:hidden;background:var(--accent-soft)}
.work-media img{width:100%;height:100%;object-fit:cover;outline:1px solid rgba(0,0,0,.10);outline-offset:-1px}
.work.is-pixel .work-img,.work.is-pixel .work-compare{image-rendering:pixelated}
.work-compare{position:absolute;inset:0;opacity:0;transition-property:opacity;transition-duration:200ms;transition-timing-function:ease-out}
.work:hover .work-compare,.work:focus-within .work-compare{opacity:1}
.work.is-broken .work-media{background:repeating-linear-gradient(45deg,var(--accent-soft),var(--accent-soft) 8px,#FFE7DE 8px,#FFE7DE 16px)}
.work.is-broken .work-media img{visibility:hidden}
.work figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:14px 8px 8px}
.work h3{font:600 16px/1.4 var(--font-sans);letter-spacing:0}
.work-meta{font-size:11px;color:var(--ink-2);white-space:nowrap;letter-spacing:.02em}
.work .work-board{display:block;margin:2px 0 0;font-size:11px;color:var(--ink-2)}
.works-empty{padding:40px;text-align:center;color:var(--ink-2);background:var(--surface);border-radius:14px;border:1px solid var(--line)}

/* 精度对比 */
.tiers-grid{display:grid;grid-template-columns:5fr 6fr;gap:72px;align-items:center}
.tier-switch{display:flex;gap:9px;margin:32px 0 0}
.tierchip{min-height:44px;padding:0 20px;border-color:var(--line);background:transparent;color:var(--ink-2);font-family:var(--font-mono);font-size:13px}
.tierchip[aria-pressed="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.tier-caption{margin:18px 0 0;font-size:13px;color:var(--ink-2)}
.tiers-figure{position:relative;margin:0;padding:26px 26px 0 0}
.tiers-dots{position:absolute;inset:0 0 46px 64px;z-index:0;
  background-image:radial-gradient(circle,rgba(242,100,60,.16) 1.2px,transparent 1.2px);background-size:18px 18px}
.tiers-figure img{position:relative;z-index:1;width:100%;max-height:460px;object-fit:contain;object-position:top;
  background:var(--surface);border-radius:12px;box-shadow:var(--shadow-hover);outline:1px solid rgba(0,0,0,.10);outline-offset:-1px}
.tiers-figure figcaption{position:relative;z-index:1;margin-top:16px;font-size:12px;color:var(--ink-2)}
.tiers-figure figcaption .mono{margin-right:10px;color:var(--accent-deep);letter-spacing:.08em}

/* 三步流程：横向时间轴，不做等宽卡片 */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--ink)}
.steps li{position:relative;padding:34px 32px 0 0;border-right:1px solid var(--line)}
.steps li+li{padding-left:32px}
.steps li:last-child{border-right:0}
.steps li::before{content:"";position:absolute;top:-6px;left:0;width:10px;height:10px;border-radius:50%;background:var(--accent)}
.steps li+li::before{left:32px}
.step-no{display:block;font-size:12px;letter-spacing:.14em;color:var(--accent-deep)}
.step-ico{display:inline-flex;margin:18px 0 12px;color:var(--ink)}
.step-ico svg{width:24px;height:24px}
.steps h3{font:700 20px/1.4 var(--font-serif)}
.steps p{margin:10px 0 0;font-size:14px;color:var(--ink-2)}

/* 关于工具 */
.about-grid{display:grid;grid-template-columns:6fr 5fr;gap:80px;align-items:start}
.about-spec{margin:8px 0 0;padding:0}
.about-spec div{display:grid;grid-template-columns:88px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.about-spec div:first-child{border-top:1px solid var(--line)}
.about-spec dt{font:12px/1.6 var(--font-mono);letter-spacing:.08em;color:var(--accent-deep)}
.about-spec dd{margin:0;font-size:14px}

/* 结尾 CTA */
.end-cta{position:relative;padding:88px 0;background:var(--accent-soft);overflow:hidden;
  background-image:radial-gradient(circle,rgba(242,100,60,.14) 1.2px,transparent 1.2px);background-size:20px 20px}
.end-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.end-cta h2{font-size:clamp(32px,3.8vw,52px);line-height:1.28}
.end-actions{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.end-actions p{margin:0;font-size:12px;color:var(--ink-2);max-width:28em}

/* 页脚 */
.site-foot{padding:36px 0 48px}
.foot-inner{display:flex;align-items:center;gap:32px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600}
.foot-brand small{display:block;font:9px/1.4 var(--font-mono);letter-spacing:.1em;color:var(--ink-2);font-weight:400}
.site-foot nav{display:flex;gap:22px;margin-left:auto;font-size:13px;color:var(--ink-2)}
.site-foot nav a:hover{color:var(--accent-deep)}
.foot-note{flex-basis:100%;margin:8px 0 0;font-size:11px;color:var(--ink-2)}

/* 入场：一次性错峰，交互态一律用 transition */
.stagger{animation:fadeUp 420ms ease-out both}
.hero-copy .stagger:nth-child(1){animation-delay:0ms}
.hero-copy .stagger:nth-child(2){animation-delay:80ms}
.hero-copy .stagger:nth-child(3){animation-delay:160ms}
.hero-copy .stagger:nth-child(4){animation-delay:240ms}
.hero-copy .stagger:nth-child(5){animation-delay:320ms}
.hero-visual.stagger{animation-delay:200ms}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px);filter:blur(4px)}to{opacity:1;transform:none;filter:blur(0)}}

/* ── 响应式 ───────────────────────────────────────── */
@media (max-width:1199px){
  .wrap,.head-inner{width:min(100% - 56px,1000px)}
  .hero-grid{grid-template-columns:1fr;gap:48px;padding:64px 0 80px}
  .hero-copy{grid-column:1;max-width:640px}
  .hero-visual{grid-column:1;translate:0 0;max-width:620px;margin-left:auto}
  .hero-param{left:-16px}
  .tiers-grid,.about-grid,.end-grid,.sec-head-split{grid-template-columns:1fr;gap:36px}
  .tiers-figure{max-width:560px}
  .work,.work.span-wide,.work.span-tall{grid-column:span 6}
  .work:nth-child(4n+2),.work:nth-child(4n+3){margin-top:0}
  .work:nth-child(even){margin-top:20px}
}
@media (max-width:767px){
  .wrap,.head-inner{width:calc(100% - 36px)}
  .head-inner{min-height:62px;gap:12px}
  .brand-txt small{display:none}
  .brand img{width:32px;height:32px}
  .menu-btn{display:inline-flex;order:3}
  .head-right{order:2;margin-left:auto;gap:6px}
  .head-right #btnLogin,.acc-name{display:none}
  .btn-quiet,.btn-key{min-height:40px;padding:0 12px;font-size:13px}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:0;margin:0;padding:8px 18px 16px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .main-nav.is-open{display:flex}
  .main-nav a{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px}
  .main-nav .nav-login{display:block}
  h1{font-size:clamp(34px,9vw,46px)}
  .lede{font-size:15px}
  .hero-proof{margin-top:36px}
  .hero-proof dt{font-size:21px}
  .hero-param{left:8px;bottom:48px;padding:10px 12px}
  .hero-cap{margin-left:8px}
  .gallery,.tiers,.how,.about{padding:64px 0}
  .sec-head h2{font-size:30px}
  .works{grid-template-columns:1fr;gap:16px}
  .work,.work.span-wide,.work.span-tall{grid-column:1}
  .work:nth-child(even){margin-top:0}
  .steps{grid-template-columns:1fr;border-top:2px solid var(--ink)}
  .steps li,.steps li+li{padding:26px 0 26px 22px;border-right:0;border-bottom:1px solid var(--line)}
  .steps li+li::before{left:0}
  .steps li:last-child{border-bottom:0}
  .about-spec div{grid-template-columns:72px 1fr;gap:12px}
  .end-cta{padding:64px 0}
  .site-foot nav{margin-left:0;flex-wrap:wrap;gap:16px}
  .gallery-tools{flex-direction:column;gap:10px;margin-bottom:28px}
  .sort-switch{align-self:flex-start}
  .site-notice{justify-content:flex-start;text-align:left;font-size:12px;padding:8px 18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}