:root{--ink:#18211d;--muted:#66706a;--paper:#f7f8f5;--white:#fff;--line:#d9ded9;--teal:#176b67;--teal-dark:#0d4d4a;--amber:#b9682a;--header-h:64px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"DM Sans","Noto Sans SC",sans-serif;letter-spacing:0}a{color:inherit}button,input{font:inherit}.site-header{position:sticky;top:0;z-index:20;min-height:var(--header-h);display:flex;align-items:center;justify-content:space-between;padding:0 5vw;background:rgba(247,248,245,.94);border-bottom:1px solid rgba(24,33,29,.12);backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:700}.brand-mark{display:grid;place-items:center;width:34px;height:34px;color:#fff;background:var(--teal-dark);border-radius:3px;font-family:Georgia,serif}.hero{position:relative;min-height:min(680px,calc(100vh - var(--header-h) - 54px));display:flex;align-items:center;overflow:hidden;background:#c7cec9}.hero>img,.hero>picture{position:absolute;inset:0;width:100%;height:100%}.hero img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,22,18,.86) 0%,rgba(12,22,18,.62) 42%,rgba(12,22,18,.06) 76%)}.hero-copy{position:relative;width:min(620px,90vw);margin-left:7vw;color:#fff;padding:72px 0}.eyebrow,.section-kicker{margin:0 0 14px;color:#7bc3bb;font-size:12px;font-weight:700}h1{margin:0;font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(52px,8vw,98px);font-weight:500;line-height:1}.hero-intro{max-width:540px;margin:24px 0 32px;font-size:clamp(17px,2vw,21px);line-height:1.75}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.button{min-height:44px;display:inline-flex;align-items:center;padding:0 20px;border:1px solid transparent;border-radius:4px;text-decoration:none;font-weight:600}.button.primary{background:#fff;color:var(--ink)}.button.secondary{border-color:rgba(255,255,255,.66);color:#fff}.button:hover{transform:translateY(-1px)}.intro-band,.content-section,.library-section{padding:76px 7vw}.intro-band{display:grid;grid-template-columns:1fr 1.1fr auto;gap:7vw;align-items:end;background:#fff;border-bottom:1px solid var(--line)}.section-kicker{color:var(--teal)}h2{margin:0;font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(31px,4vw,50px);font-weight:500;line-height:1.15}.intro-band>p,.section-heading>p{margin:0;color:var(--muted);line-height:1.8}.stats{display:flex;margin:0;gap:30px}.stats div{min-width:74px}.stats dt{font-size:31px;font-weight:700;color:var(--teal-dark)}.stats dd{margin:2px 0 0;color:var(--muted);font-size:13px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:36px;margin-bottom:34px}.section-heading>p{max-width:420px}.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.note-card{min-height:230px;display:flex;flex-direction:column;padding:25px;background:#fff;border:1px solid var(--line);border-radius:6px}.note-card:hover{border-color:#aebcb5;box-shadow:0 12px 32px rgba(33,51,43,.07)}.note-card .type{color:var(--amber);font-size:11px;font-weight:700}.note-card h3{margin:20px 0 10px;font-size:20px;line-height:1.4}.note-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}.note-card button{margin-top:auto;padding:18px 0 0;color:var(--teal);background:transparent;border:0;text-align:left;cursor:pointer;font-weight:600}.library-section{background:#eef1ed}.search-box{width:min(320px,100%);min-height:44px;display:flex;align-items:center;gap:10px;padding:0 13px;background:#fff;border:1px solid var(--line);border-radius:4px}.search-box svg{width:18px;color:var(--muted)}.search-box input{width:100%;border:0;outline:0;color:var(--ink);background:transparent}.paper-list{border-top:1px solid #c9d0ca}.paper-row{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:18px;align-items:center;padding:18px 6px;border-bottom:1px solid #c9d0ca}.file-icon{width:38px;height:44px;display:grid;place-items:center;color:var(--amber);background:#fff;border:1px solid var(--line);border-radius:3px}.file-icon svg{width:20px}.paper-name{margin:0 0 5px;overflow-wrap:anywhere;font-size:16px;font-weight:600}.paper-meta{color:var(--muted);font-size:13px}.paper-actions{display:flex;gap:8px}.paper-actions a,.paper-actions button{min-height:38px;padding:0 13px;border-radius:4px;border:1px solid #bcc6bf;background:transparent;color:var(--ink);cursor:pointer;text-decoration:none}.paper-actions .open{border-color:var(--teal);background:var(--teal);color:#fff}.empty{grid-column:1/-1;padding:34px;color:var(--muted);background:rgba(255,255,255,.62);border:1px dashed #b7c0ba;border-radius:6px;line-height:1.8}footer{display:flex;justify-content:space-between;padding:28px 7vw;color:var(--muted);background:var(--ink);font-size:13px}footer p{margin:0}footer a{color:#fff}dialog{width:min(1100px,94vw);height:min(820px,92vh);padding:0;border:0;border-radius:6px;box-shadow:0 24px 80px rgba(0,0,0,.3)}dialog::backdrop{background:rgba(14,20,17,.72)}.dialog-bar{height:56px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 16px 0 20px;border-bottom:1px solid var(--line)}.dialog-bar strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.icon-button{width:38px;height:38px;display:grid;place-items:center;border:0;background:transparent;cursor:pointer}.icon-button svg{width:20px}#reader-content{height:calc(100% - 56px);overflow:auto;background:#e8ebe8}#reader-content iframe{width:100%;height:100%;border:0;background:#fff}.note-reader{max-width:780px;min-height:100%;margin:0 auto;padding:44px;background:#fff;white-space:pre-wrap;font:16px/1.9 "Noto Sans SC",sans-serif}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:820px){.site-header{padding:0 20px}.hero{min-height:590px;align-items:end}.hero-copy{margin:0 24px;padding:70px 0 48px}.hero-shade{background:linear-gradient(0deg,rgba(12,22,18,.9) 0%,rgba(12,22,18,.48) 70%,rgba(12,22,18,.2) 100%)}.intro-band{grid-template-columns:1fr;gap:28px}.note-grid{grid-template-columns:1fr 1fr}.section-heading{align-items:start;flex-direction:column}}@media(max-width:560px){.brand>span:last-child{display:none}.intro-band,.content-section,.library-section{padding:56px 20px}.note-grid{grid-template-columns:1fr}.paper-row{grid-template-columns:36px minmax(0,1fr);gap:12px}.paper-actions{grid-column:2}.paper-actions a,.paper-actions button{flex:1}.note-reader{padding:25px 20px}footer{padding:25px 20px}}
/* 可访问性打磨：键盘焦点可见 + 尊重减弱动效偏好 */
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:3px}.note-card,.button,.paper-actions a,.paper-actions button{transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease,background-color .18s ease}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}.button:hover{transform:none}}
/* 深色模式 */
.sections-band{border-bottom:1px solid var(--line)}.section-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.section-card{text-decoration:none;color:inherit}.section-card>svg{width:24px;height:24px;color:var(--teal)}.section-card h3{margin:18px 0 10px}.section-card .go{display:flex;align-items:center;gap:6px;margin-top:auto;padding-top:18px;color:var(--teal);font-size:14px;font-weight:600}.section-card .go svg{width:16px;height:16px;transition:transform .18s}.section-card:hover .go svg{transform:translateX(3px)}.section-card:focus-visible{outline:2px solid var(--teal);outline-offset:3px}@media(max-width:820px){.section-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.section-grid{grid-template-columns:1fr}}@media(prefers-color-scheme:dark){:root{color-scheme:dark;--ink:#e4ebe7;--muted:#94a09a;--paper:#111815;--white:#19221f;--line:#2b3733;--teal:#5cbcb2;--teal-dark:#3f9f96;--amber:#d5924f}.site-header{background:rgba(17,24,21,.94);border-bottom-color:rgba(228,235,231,.13)}.brand-mark{color:#0d1512;background:var(--teal-dark)}.hero{background:#1b2320}.section-kicker{color:var(--teal)}.intro-band{background:var(--white)}.stats dt{color:var(--teal)}.note-card{background:var(--white);border-color:var(--line)}.note-card:hover{border-color:#3d4c46;box-shadow:0 12px 32px rgba(0,0,0,.45)}.library-section{background:#141c19}.search-box{background:var(--white);border-color:var(--line)}.paper-list{border-top-color:var(--line)}.paper-row{border-bottom-color:var(--line)}.file-icon{background:var(--white);border-color:var(--line)}.paper-actions a,.paper-actions button{border-color:#3a4842;color:var(--ink)}.paper-actions .open{border-color:var(--teal);background:var(--teal);color:#0d1512}.empty{background:rgba(25,34,31,.62);border-color:#3a4842}footer{background:#0b110f;border-top:1px solid var(--line)}footer a{color:var(--teal)}dialog{background:var(--white);color:var(--ink);box-shadow:0 24px 80px rgba(0,0,0,.6)}.dialog-bar{border-bottom-color:var(--line)}.icon-button{color:var(--ink)}#reader-content{background:#0e1513}#reader-content iframe{background:var(--white)}.note-reader{background:var(--white);color:var(--ink)}}
/* Quick cards for hero actions - card form */
.quick-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
  transition: all .2s ease;
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
}

.card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(23,107,103,.12);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 8px;
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
}