:root {
  --paper: #f7f3e9;
  --paper-dark: #ede7d9;
  --ink: #263c31;
  --ink-soft: #566057;
  --line: #d7d1c3;
  --rust: #8f492b;
  --leaf: #dbe4d5;
  --radius: 0;
  --radius-sm: 0;
  --shadow: 0 1px 2px rgba(38,49,37,.05), 0 10px 28px rgba(38,49,37,.07);
  --serif: "Songti SC", "Noto Serif CJK SC", "STSong", serif;
  --sans: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); border-radius: 0; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.75 var(--sans); -webkit-font-smoothing: antialiased; border-radius: 0; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--rust); outline-offset: 3px; }
::selection { background: #ddc99f; }
.wrap { width: min(100% - 72px, 1320px); margin-inline: auto; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 10; top: -80px; left: 20px; padding: 10px 16px; background: #fff; border-radius: var(--radius-sm); }
.skip-link:focus { top: 10px; }
.eyebrow { margin: 0; color: var(--rust); font-size: .72rem; font-weight: 700; letter-spacing: .18em; }

.site-header { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 25px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 11px; font: 700 1.2rem/1.25 var(--serif); letter-spacing: .07em; }
.brand small { display: block; margin-top: 3px; font: 600 .47rem/1.3 var(--sans); letter-spacing: .19em; }
.brand-mark { display: block; width: 42px; height: 42px; }
.site-header nav { display: flex; align-items: center; gap: 25px; color: var(--ink-soft); font-size: .78rem; }
.site-header nav a { color: var(--ink); font-weight: 700; }
.site-header nav a:hover, .site-footer a:hover { color: var(--rust); }

/* ---- 首页：第一屏 HERO ---- */
.hero { display: grid; grid-template-columns: 1.35fr 1fr; align-items: center; gap: clamp(32px, 5vw, 72px); padding-block: clamp(40px, 6vw, 76px); border-bottom: 1px solid var(--ink); }
.hero-intro h1 { margin: 12px 0 0; font: 500 clamp(2.6rem, 5vw, 4.6rem)/1.26 var(--serif); letter-spacing: -.04em; }
.hero-intro h1 em { color: var(--rust); font-style: normal; }
.hero-lead { max-width: 460px; margin: 22px 0 0; color: var(--ink-soft); font-size: .95rem; line-height: 1.95; }
.intro-signature { margin-top: 18px; color: var(--ink); font-size: .73rem; letter-spacing: .13em; }
.hero-feature { align-self: stretch; display: flex; flex-direction: column; min-width: 0; }
.hero-feature .eyebrow { margin-bottom: 14px; }

.feature { display: grid; grid-template-columns: minmax(0, 150px) minmax(0, 1fr); min-width: 0; gap: 22px; align-items: center; padding: 22px; background: #fbf8f0; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s, border-color .2s; }
.feature:hover { transform: translateY(-3px); border-color: var(--rust); box-shadow: 0 2px 4px rgba(38,49,37,.08), 0 18px 40px rgba(38,49,37,.12); }
.feature__cover { display: grid; place-items: center; min-width: 0; }
.feature__body { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; overflow-wrap: anywhere; }
.feature__body h2 { margin: 5px 0 2px; font: 600 1.5rem/1.3 var(--serif); }
.feature__date { margin-top: 10px; color: var(--rust); font-size: .68rem; font-weight: 700; letter-spacing: .04em; }

/* ---- 首页：第二屏 找书 ---- */
.find { padding-block: clamp(36px, 5vw, 60px) 70px; }
.find-head { margin-bottom: 18px; }
.find-head h2 { margin: 9px 0 0; font: 600 clamp(1.6rem, 2.4vw, 2.2rem)/1.35 var(--serif); letter-spacing: -.035em; }
.discovery-bar { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 16px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: #fbf8f0; }
.discovery-bar .search { margin-right: auto; }
.discovery-bar strong { font: 600 .83rem/1.4 var(--serif); }
.discovery-bar label { display: flex; align-items: center; gap: 6px; color: var(--ink-soft); font-size: .74rem; }
.search input { width: 260px; max-width: 100%; padding: 10px 16px; border: 1px solid var(--line); border-radius: 0; background: #fff; color: var(--ink); font-size: .8rem; outline: none; }
.search input:focus { border-color: var(--ink); }
.search input::placeholder { color: #8a958c; }
.discovery-bar select { padding: 9px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; color: var(--ink); font-size: .78rem; cursor: pointer; }
.discovery-bar select:focus { border-color: var(--ink); outline: none; }
.catalog-count { margin: 18px 0 16px; color: var(--ink-soft); font-size: .76rem; }

.book-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.book-card { min-width: 0; background: #fbf8f0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s, border-color .2s; }
.book-card:hover { transform: translateY(-3px); border-color: var(--rust); box-shadow: 0 2px 4px rgba(38,49,37,.08), 0 18px 40px rgba(38,49,37,.12); }
.book-card a { display: grid; grid-template-columns: 105px minmax(0, 1fr); gap: 17px; min-height: 190px; padding: 20px; }
.book-card__cover { display: grid; place-items: center; border-radius: var(--radius-sm); }
.book-card__body { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; }
.book-card__topic { color: var(--rust); font-size: .72rem; font-weight: 700; letter-spacing: .08em; }
.book-card h2 { margin: 5px 0 2px; font: 600 1.27rem/1.35 var(--serif); }
.book-card__meta { margin: 0; color: var(--ink-soft); font-size: .76rem; }
.book-card__reason { margin: 11px 0 10px; font-size: .82rem; line-height: 1.7; }
.book-card__more { margin-top: auto; color: var(--rust); font-size: .76rem; font-weight: 700; }
.no-results { padding: 40px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink-soft); text-align: center; }

.pager { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.pager-btn { min-width: 40px; height: 40px; padding: 0 13px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; color: var(--ink); font-size: .8rem; cursor: pointer; transition: border-color .15s, background .15s, color .15s; }
.pager-btn:hover:not(:disabled) { border-color: var(--ink); }
.pager-btn[aria-current="page"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.pager-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ---- 首页：写给一起读书的人 ---- */
.letter { margin-top: 8px; padding: 28px; background: var(--leaf); border-radius: var(--radius); }
.letter h2 { margin-bottom: 13px; }
.letter p:not(.eyebrow) { margin: 0 0 11px; font-size: .82rem; line-height: 1.9; color: var(--ink); }

.mock-cover { position: relative; isolation: isolate; display: flex; flex-direction: column; align-items: flex-start; width: min(100%, 280px); aspect-ratio: 3 / 4.1; padding: 22px 20px 18px; overflow: hidden; background: var(--card-color, #466a56); color: #f8edce; border: 1px solid #eadbb383; box-shadow: 10px 15px 25px #27312526; text-align: left; border-radius: 0; }
.mock-cover::before { content: ""; position: absolute; z-index: -1; inset: 7px; border: 1px solid #f8edce48; pointer-events: none; }
.mock-cover::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(150deg, #16291e10 10%, #16291e13 38%, #10221877 100%); }
.mock-cover__art { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .72; }
.mock-cover__top { display: flex; justify-content: space-between; width: 100%; gap: 8px; font-size: .56rem; font-weight: 700; letter-spacing: .07em; }
.mock-cover__top i { font: 500 .44rem/1.5 var(--sans); letter-spacing: .05em; white-space: nowrap; }
.mock-cover__topic { margin-top: auto; padding: 3px 7px; border: 1px solid #f8edce99; font-size: .59rem; letter-spacing: .13em; }
.mock-cover strong { display: block; width: 100%; margin-top: 12px; font: 600 clamp(1.5rem, 2.3vw, 2.3rem)/1.2 var(--serif); letter-spacing: -.04em; overflow-wrap: anywhere; text-shadow: 0 2px 14px #13281cc9; }
.mock-cover__original { min-height: 1.5em; margin-top: 7px; font: italic .62rem/1.5 Georgia, serif; opacity: .86; overflow-wrap: anywhere; }
.mock-cover__bottom { display: flex; justify-content: space-between; gap: 6px; width: 100%; margin-top: 16px; padding-top: 9px; border-top: 1px solid #f8edce91; font-size: .65rem; }
.mock-cover--compact { width: 100%; padding: 9px 8px 8px; box-shadow: 5px 7px 11px #27312525; }
.mock-cover--compact::before { inset: 4px; }
.mock-cover--compact .mock-cover__top { font-size: .31rem; }
.mock-cover--compact .mock-cover__top i { display: none; }
.mock-cover--compact .mock-cover__topic { padding: 1px 3px; font-size: .35rem; letter-spacing: 0; }
.mock-cover--compact strong { margin-top: 4px; font-size: clamp(.82rem, 1.15vw, 1.05rem); line-height: 1.2; }
.mock-cover--compact .mock-cover__original { display: none; }
.mock-cover--compact .mock-cover__bottom { margin-top: 5px; padding-top: 3px; font-size: .38rem; }
.feature .mock-cover { padding: 12px 11px 10px; }
.feature .mock-cover__top { font-size: .56rem; white-space: nowrap; }
.feature .mock-cover__top i { display: none; }
.feature .mock-cover__topic { padding: 2px 4px; font-size: .5rem; letter-spacing: .04em; }
.feature .mock-cover strong { margin-top: 7px; font-size: clamp(1rem, 1.2vw, 1.25rem); line-height: 1.25; }
.feature .mock-cover__original { display: none; }
.feature .mock-cover__bottom { gap: 3px; margin-top: 7px; padding-top: 5px; font-size: .48rem; overflow-wrap: anywhere; }

/* ---- 详情页 ---- */
.detail { padding-top: 25px; padding-bottom: 55px; }
.back-link { color: var(--ink-soft); font-size: .75rem; }
.back-link:hover { color: var(--rust); }
.detail-layout { display: grid; grid-template-columns: minmax(250px, 330px) minmax(0, 1fr); gap: clamp(40px, 6vw, 95px); margin-top: 27px; }
.detail-aside { align-self: start; }
.main-cover { display: grid; place-items: center; min-height: 400px; padding: 28px; background: #e8e5dc; border-radius: var(--radius); }
.profile-list { margin: 0; border-top: 1px solid var(--ink); }
.profile-list div { display: grid; grid-template-columns: 88px 1fr; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .78rem; }
.profile-list dt { color: var(--ink-soft); }
.profile-list dd { margin: 0; overflow-wrap: anywhere; }
.detail-content h1 { margin: 8px 0 5px; font: 600 clamp(2.8rem, 4.2vw, 4.6rem)/1.25 var(--serif); letter-spacing: -.04em; }
.detail-original { margin: 0; color: var(--ink-soft); font-size: .8rem; }
.detail-original span { padding-inline: 5px; }
.detail-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 24px 0 25px; }
.detail-tags span { padding: 5px 12px; border: 1px solid var(--line); border-radius: 0; font-size: .68rem; }
.lead-section { padding: 20px 25px; background: var(--leaf); border-radius: var(--radius); }
.recommendation { margin: 10px 0 0; font: 500 clamp(1.4rem, 2.1vw, 1.9rem)/1.6 var(--serif); }
.recommendation-sub { margin: 9px 0 0; font-size: .85rem; line-height: 1.85; }
.detail-section { padding: 24px 0 21px; border-bottom: 1px solid var(--line); }
.detail-section h2 { margin: 7px 0 13px; font: 600 1.37rem/1.45 var(--serif); }
.detail-section > p:not(.eyebrow) { max-width: 760px; margin: 0 0 12px; font-size: .95rem; line-height: 1.95; }
.detail-section .core-question { padding-left: 12px; border-left: 2px solid var(--rust); color: var(--ink-soft); font-size: .82rem !important; }
.detail-section .question { font: 500 1.05rem/1.75 var(--serif) !important; }
.detail-section .reading-note { color: var(--ink-soft); font-size: .78rem !important; }
.video-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.video-card { display: block; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fcf9f2; transition: transform .2s, box-shadow .2s; }
.video-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.video-card__visual { position: relative; display: grid; place-items: center; width: 100%; aspect-ratio: 4 / 3; overflow: hidden; background: #30483b; }
.video-card__visual img { width: 100%; height: 100%; object-fit: cover; }
.video-card__fallback { max-width: 80%; color: #f8edce; font: 600 1.7rem/1.4 var(--serif); text-align: center; }
.video-card__play { position: absolute; right: 13px; bottom: 13px; display: grid; place-items: center; width: 37px; height: 37px; padding-left: 2px; border-radius: 0; background: #f8edcede; color: var(--ink); font-size: .75rem; }
.video-card__body { display: flex; flex-direction: column; gap: 8px; padding: 15px; }
.video-card__body strong { font: 600 .95rem/1.5 var(--serif); }
.video-card__body small { color: var(--ink-soft); font-size: .7rem; }
.video-card__body > span { color: var(--rust); font-size: .72rem; font-weight: 700; }
.edition-list { display: grid; gap: 12px; padding: 0; margin: 0; list-style: none; }
.edition-item { display: flex; align-items: flex-start; gap: 18px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fcf9f2; }
.edition-item__cover { flex: 0 0 100px; margin: 0; }
.edition-item__cover img { width: 100px; height: 145px; object-fit: contain; object-position: center; background: #fff; border: 1px solid var(--line); border-radius: 0; }
.edition-item__cover figcaption { margin-top: 4px; font-size: .66rem; color: var(--ink-soft); }
.edition-item__cover a { text-decoration: underline; }
.edition-item__body { min-width: 0; flex: 1; }
.edition-item__number { color: var(--rust); font-size: .65rem; font-weight: 700; letter-spacing: .1em; }
.edition-item h3 { margin: 3px 0 10px; font: 600 1.05rem/1.4 var(--serif); }
.edition-item dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 18px; margin: 0; }
.edition-item dl div { display: grid; grid-template-columns: 62px 1fr; gap: 5px; font-size: .75rem; }
.edition-item dt { color: var(--ink-soft); }
.edition-item dd { margin: 0; overflow-wrap: anywhere; }
.discussion-section { margin-top: 44px; padding: clamp(24px, 4vw, 42px); background: #dce7d8; border-radius: var(--radius); }
.discussion-section h2 { margin: 8px 0 14px; font: 600 clamp(1.45rem, 2.2vw, 2rem)/1.35 var(--serif); }
.discussion-section .question { max-width: 760px; margin: 0; font: 500 1.14rem/1.8 var(--serif); }
.discussion-section .reading-note { max-width: 760px; margin: 18px 0 0; padding-top: 15px; border-top: 1px solid #97aa98; color: var(--ink-soft); font-size: .8rem; }
.book-pager { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 48px; border-top: 1px solid var(--ink); }
.book-pager a { display: flex; flex-direction: column; gap: 2px; padding-top: 16px; }
.book-pager a:last-child { text-align: right; }
.book-pager a span { color: var(--ink-soft); font-size: .7rem; }
.book-pager a strong { font: 600 1rem var(--serif); }
.book-pager a:hover strong { color: var(--rust); }
.error-page { min-height: 55vh; padding-block: 100px; }
.error-page h1 { font: 600 clamp(2rem, 4vw, 4rem) var(--serif); }
.error-page a { border-bottom: 1px solid currentColor; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 26px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .72rem; }
.site-footer span:first-child { color: var(--ink); font-family: var(--serif); font-weight: 700; }

@media (max-width: 1100px) {
  .book-card a { grid-template-columns: 92px 1fr; gap: 14px; padding: 17px; }
  .mock-cover--compact { width: 100%; }
  .search input { width: 210px; }
  .feature { grid-template-columns: minmax(0, 128px) minmax(0, 1fr); gap: 18px; padding: 18px; }
}
@media (max-width: 800px) {
  .wrap { width: min(100% - 40px, 1320px); }
  .hero { grid-template-columns: 1fr; gap: 26px; align-items: start; }
  .discovery-bar { flex-direction: column; align-items: stretch; gap: 14px; }
  .discovery-bar .search { margin-right: 0; }
  .search input { width: 100%; }
  .discovery-bar label { justify-content: space-between; }
  .discovery-bar select { flex: 1; max-width: none; }
  .feature { grid-template-columns: minmax(0, 120px) minmax(0, 1fr); }
  .detail-layout { grid-template-columns: 220px 1fr; gap: 30px; }
  .main-cover { min-height: 320px; padding: 20px; }
}
@media (max-width: 620px) {
  .site-header { min-height: 72px; }
  .site-header nav span { display: none; }
  .hero-intro h1 { font-size: 2.5rem; }
  .feature { grid-template-columns: 1fr; }
  .feature__cover { max-width: 160px; }
  .book-grid { grid-template-columns: 1fr; }
  .book-card a { grid-template-columns: 84px 1fr; min-height: 150px; padding: 16px; gap: 13px; }
  .book-card__reason { margin: 7px 0; font-size: .8rem; }
  .letter { padding: 22px; }
  .detail-layout { display: block; }
  .detail-aside { display: grid; grid-template-columns: 145px 1fr; column-gap: 18px; align-items: start; }
  .main-cover { min-height: 210px; padding: 14px; grid-row: span 2; }
  .main-cover .mock-cover { width: 120px; }
  .main-cover .mock-cover strong { font-size: 1.25rem; }
  .profile-list div { grid-template-columns: 64px 1fr; gap: 3px; padding: 5px 0; font-size: .7rem; }
  .detail-content { margin-top: 35px; }
  .detail-content h1 { font-size: 2.6rem; }
  .edition-item dl { grid-template-columns: 1fr; }
  .video-list { grid-template-columns: 1fr; }
  .site-footer { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}