/* ============================================================
 * 禾光文化官网 - 高端编辑风设计
 * 配色：墨黑 / 宣纸米白 / 铜金
 * ============================================================ */

:root {
  --ink: #16130e;
  --ink-soft: #2a251d;
  --paper: #f6f3ec;
  --paper-deep: #efeadf;
  --gold: #b3854d;
  --gold-light: #cfa871;
  --gray: #7c766b;
  --line: rgba(22, 19, 14, 0.12);
  --serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
em { font-style: normal; }
.container { width: min(1280px, 92%); margin: 0 auto; }

::selection { background: var(--gold); color: #fff; }

/* ---------- 加载动画 ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 999;
  background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.7s var(--ease), visibility 0.7s;
}
.preloader.done { opacity: 0; visibility: hidden; }
.preloader-inner { text-align: center; }
.preloader-logo {
  font-family: var(--serif); font-size: 44px; font-weight: 700;
  color: var(--paper); letter-spacing: 0.4em; text-indent: 0.4em;
  animation: fadePulse 1.6s ease infinite;
}
.preloader-bar {
  width: 160px; height: 2px; margin: 24px auto 0;
  background: rgba(246, 243, 236, 0.15); overflow: hidden; border-radius: 2px;
}
.preloader-bar i {
  display: block; height: 100%; width: 40%;
  background: var(--gold); border-radius: 2px;
  animation: loadSlide 1.1s var(--ease) infinite;
}
@keyframes loadSlide { 0% { transform: translateX(-110%); } 100% { transform: translateX(280%); } }
@keyframes fadePulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s var(--ease), box-shadow 0.4s, transform 0.4s;
}
.nav-inner {
  width: min(1400px, 94%); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 84px;
}
.nav.solid {
  background: rgba(246, 243, 236, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.nav.solid .nav-inner { height: 68px; }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 8px;
  background: var(--ink); color: var(--gold-light);
  font-family: var(--serif); font-size: 24px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.logo-text {
  font-family: var(--serif); font-size: 21px; font-weight: 700;
  color: var(--paper); letter-spacing: 0.14em;
  display: flex; flex-direction: column; line-height: 1.15;
  transition: color 0.4s;
}
.logo-text i { font-style: normal; font-family: var(--sans); font-size: 9px; letter-spacing: 0.32em; opacity: 0.72; font-weight: 400; }
.nav.solid .logo-text { color: var(--ink); }

.nav-menu { display: flex; align-items: center; gap: 40px; }
.nav-menu a {
  position: relative; font-size: 15px; letter-spacing: 0.12em;
  color: rgba(246, 243, 236, 0.85); transition: color 0.3s;
  padding: 6px 0;
}
.nav-menu a::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--gold);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.nav-menu a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav.solid .nav-menu a { color: var(--ink-soft); }
.nav-cta {
  border: 1px solid currentColor; border-radius: 999px;
  padding: 9px 26px !important; transition: all 0.35s var(--ease) !important;
}
.nav-cta:hover { background: var(--gold); border-color: var(--gold); color: #fff !important; }
.nav-cta::after { display: none; }

.nav-burger {
  display: none; width: 44px; height: 44px; border: none; background: none;
  cursor: pointer; flex-direction: column; gap: 7px; align-items: center; justify-content: center;
}
.nav-burger span { width: 26px; height: 2px; background: var(--paper); transition: 0.35s var(--ease); }
.nav.solid .nav-burger span { background: var(--ink); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; height: 100vh; min-height: 640px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; background: var(--ink);
}
.hero-video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0;
  animation: videoIn 2s ease 0.5s forwards;
}
@keyframes videoIn { to { opacity: 1; } }
.hero-mask {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(22,19,14,0.55) 0%, rgba(22,19,14,0.18) 40%, rgba(22,19,14,0.62) 100%);
}
.hero-content { position: relative; text-align: center; z-index: 2; padding: 0 6%; }
.hero-eyebrow {
  color: var(--gold-light); font-size: 13px; letter-spacing: 0.5em; text-indent: 0.5em;
  margin-bottom: 34px; font-weight: 400;
}
.hero-title {
  font-family: var(--serif); color: var(--paper);
  font-size: clamp(44px, 7.2vw, 96px); font-weight: 700;
  line-height: 1.28; letter-spacing: 0.06em;
}
.hero-title .line { display: block; overflow: hidden; }
.hero-title .line em {
  display: inline-block;
  animation: lineUp 1.2s var(--ease) both;
}
.hero-title .line:nth-child(2) em { animation-delay: 0.18s; }
@keyframes lineUp { from { transform: translateY(110%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.hero-sub {
  margin-top: 38px; color: rgba(246, 243, 236, 0.78);
  font-size: 15px; letter-spacing: 0.28em; font-weight: 300; line-height: 2.3;
}
.hero-scroll {
  position: absolute; bottom: 44px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 14px; z-index: 2;
}
.hero-scroll-line {
  width: 1px; height: 64px; background: rgba(246, 243, 236, 0.4);
  position: relative; overflow: hidden;
}
.hero-scroll-line::after {
  content: ''; position: absolute; top: -100%; left: 0;
  width: 100%; height: 100%; background: var(--gold-light);
  animation: scrollDrop 2.2s var(--ease) infinite;
}
@keyframes scrollDrop { 0% { top: -100%; } 60%, 100% { top: 100%; } }
.hero-scroll-txt { color: rgba(246, 243, 236, 0.6); font-size: 10px; letter-spacing: 0.5em; text-indent: 0.5em; }

/* ---------- 通用板块 ---------- */
.sec { padding: 130px 0; }
section[id] { scroll-margin-top: 76px; }
.sec-head { display: flex; align-items: flex-end; gap: 28px; margin-bottom: 72px; position: relative; }
.sec-no {
  font-family: var(--serif); font-size: 15px; color: var(--gold);
  letter-spacing: 0.2em; padding-bottom: 10px; font-weight: 600;
}
.sec-title {
  font-family: var(--serif); font-size: clamp(34px, 4vw, 52px);
  font-weight: 700; letter-spacing: 0.08em; line-height: 1.2;
}
.sec-en {
  color: var(--gray); font-size: 12px; letter-spacing: 0.44em;
  margin-top: 12px; text-transform: uppercase;
}
.sec-head::after {
  content: ''; position: absolute; right: 0; bottom: 6px;
  width: min(320px, 22%); height: 1px; background: var(--line);
}
.sec-lead {
  margin-left: auto; color: var(--gray); font-size: 14px;
  letter-spacing: 0.14em; text-align: right; line-height: 2.2; padding-bottom: 4px;
}

/* ---------- 新书推荐 ---------- */
.sec-books { background: var(--paper); }
.book-tabs { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 60px; }
.book-tab {
  font-family: var(--serif); font-size: 17px; letter-spacing: 0.2em;
  padding: 12px 34px; border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--ink-soft); cursor: pointer;
  transition: all 0.35s var(--ease);
}
.book-tab:hover { border-color: var(--gold); color: var(--gold); }
.book-tab.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.book-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 34px;
}
.book-card { cursor: pointer; animation: cardIn 0.7s var(--ease) both; }
.book-card:nth-child(2) { animation-delay: 0.08s; }
.book-card:nth-child(3) { animation-delay: 0.16s; }
.book-card:nth-child(4) { animation-delay: 0.24s; }
@keyframes cardIn { from { opacity: 0; transform: translateY(34px); } to { opacity: 1; transform: none; } }
.book-cover {
  position: relative; aspect-ratio: 3/4.2; border-radius: 4px;
  padding: 30px 24px; overflow: hidden;
  display: flex; flex-direction: column; justify-content: space-between;
  box-shadow: 0 20px 44px -18px rgba(22, 19, 14, 0.35);
  transition: transform 0.55s var(--ease), box-shadow 0.55s var(--ease);
}
.book-card:hover .book-cover { transform: translateY(-12px); box-shadow: 0 34px 60px -20px rgba(22, 19, 14, 0.45); }
.book-cover::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 7px;
  background: rgba(255,255,255,0.22);
}
.book-cover::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(255,255,255,0.14) 0%, transparent 46%, rgba(0,0,0,0.12) 100%);
  pointer-events: none;
}
.book-cover .b-title {
  font-family: var(--serif); font-size: 24px; font-weight: 700;
  color: #fff; line-height: 1.5; letter-spacing: 0.08em; position: relative; z-index: 1;
}
.book-cover .b-no {
  font-family: var(--serif); color: rgba(255,255,255,0.55);
  font-size: 12px; letter-spacing: 0.3em;
}
.book-cover .b-spine-line {
  position: absolute; right: 22px; top: 0; bottom: 0; width: 1px;
  background: rgba(255,255,255,0.25);
}
.book-meta { margin-top: 20px; }
.book-meta .b-author { font-size: 14px; color: var(--ink-soft); letter-spacing: 0.1em; }
.book-meta .b-cat { font-size: 12px; color: var(--gray); letter-spacing: 0.2em; margin-top: 4px; }
.book-meta .b-look {
  display: inline-block; margin-top: 12px; font-size: 12px; letter-spacing: 0.22em;
  color: var(--gold); border-bottom: 1px solid transparent; transition: border-color 0.3s;
}
.book-card:hover .b-look { border-color: var(--gold); }

/* ---------- 业务版图 ---------- */
.sec-business { background: var(--ink); color: var(--paper); }
.sec-business .sec-title { color: var(--paper); }
.sec-business .sec-en { color: rgba(246,243,236,0.4); }
.sec-business .sec-no { color: var(--gold-light); }
.sec-business .sec-head::after { background: rgba(246,243,236,0.16); }
.biz-tabs { display: flex; gap: 0; border-bottom: 1px solid rgba(246,243,236,0.14); margin-bottom: 64px; overflow-x: auto; scrollbar-width: none; }
.biz-tabs::-webkit-scrollbar { display: none; }
.biz-tab {
  font-family: var(--serif); font-size: 18px; letter-spacing: 0.16em;
  background: none; border: none; color: rgba(246,243,236,0.45);
  padding: 18px 34px; cursor: pointer; position: relative;
  transition: color 0.35s; white-space: nowrap;
}
.biz-tab::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: var(--gold); transform: scaleX(0); transition: transform 0.45s var(--ease);
}
.biz-tab.active { color: var(--paper); }
.biz-tab.active::after { transform: scaleX(1); }
.biz-panel { animation: cardIn 0.6s var(--ease) both; }
.biz-layout { display: grid; grid-template-columns: 5fr 6fr; gap: 72px; align-items: center; }
.biz-info .biz-en {
  color: var(--gold-light); font-size: 12px; letter-spacing: 0.44em;
  margin-bottom: 22px;
}
.biz-info h3 {
  font-family: var(--serif); font-size: clamp(26px, 2.6vw, 38px);
  font-weight: 700; line-height: 1.5; letter-spacing: 0.05em; margin-bottom: 28px;
}
.biz-info p {
  color: rgba(246,243,236,0.62); font-size: 15px; font-weight: 300;
  line-height: 2.2; letter-spacing: 0.1em;
}
.biz-info .biz-idx {
  margin-top: 46px; font-family: var(--serif);
  display: flex; align-items: baseline; gap: 10px;
}
.biz-info .biz-idx b { font-size: 44px; color: var(--gold); font-weight: 600; }
.biz-info .biz-idx span { color: rgba(246,243,236,0.35); font-size: 13px; letter-spacing: 0.2em; }
.biz-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.biz-img {
  position: relative; border-radius: 20px; overflow: hidden; aspect-ratio: 3/3.6;
  background: var(--ink-soft);
}
.biz-img:nth-child(2) { transform: translateY(44px); }
.biz-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.9s var(--ease); opacity: 0.92;
}
.biz-img:hover img { transform: scale(1.06); opacity: 1; }
.biz-img figcaption {
  position: absolute; left: 20px; bottom: 16px; z-index: 2;
  color: #fff; font-size: 13px; letter-spacing: 0.24em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.biz-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(22,19,14,0.5));
}

/* ---------- 新媒体矩阵 ---------- */
.sec-media { background: var(--paper-deep); }
.media-group { margin-bottom: 78px; }
.media-group:last-child { margin-bottom: 0; }
.media-group-head {
  display: flex; align-items: baseline; gap: 18px; margin-bottom: 34px;
}
.media-group-head h3 {
  font-family: var(--serif); font-size: 24px; font-weight: 700; letter-spacing: 0.12em;
}
.media-group-head span { color: var(--gray); font-size: 11px; letter-spacing: 0.36em; }
.media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.media-card {
  position: relative; border-radius: 20px; overflow: hidden;
  aspect-ratio: 16/10; background: var(--ink-soft); cursor: pointer;
}
.media-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.85s var(--ease), opacity 0.5s; opacity: 0.88;
}
.media-card:hover img { transform: scale(1.07); opacity: 1; }
.media-card::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(22,19,14,0.06) 30%, rgba(22,19,14,0.66));
  transition: opacity 0.5s;
}
.media-card .m-name {
  position: absolute; left: 26px; bottom: 22px; z-index: 2;
  color: #fff; font-family: var(--serif); font-size: 21px;
  font-weight: 600; letter-spacing: 0.14em;
  display: flex; align-items: center; gap: 12px;
}
.media-card .m-name::after {
  content: '→'; font-family: var(--sans); font-size: 15px;
  transform: translateX(-8px); opacity: 0; transition: all 0.4s var(--ease);
}
.media-card:hover .m-name::after { transform: none; opacity: 1; }

/* ---------- 大事记 ---------- */
.sec-timeline { background: var(--paper); }
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--line) 90%);
}
.tl-item { position: relative; padding: 0 0 52px 46px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ''; position: absolute; left: -40px; top: 10px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--gold);
  transition: all 0.4s var(--ease);
}
.tl-item:hover::before { background: var(--gold); transform: scale(1.25); }
.tl-date {
  font-family: var(--serif); font-size: 15px; color: var(--gold);
  letter-spacing: 0.22em; font-weight: 600; margin-bottom: 10px;
}
.tl-text { color: var(--ink-soft); font-size: 15.5px; letter-spacing: 0.08em; max-width: 640px; }

/* ---------- 关于我们 ---------- */
.sec-about { background: var(--paper-deep); }
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.about-cell {
  background: #fff; border-radius: 20px; padding: 46px 44px;
  box-shadow: 0 14px 40px -22px rgba(22,19,14,0.18);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  position: relative; overflow: hidden;
}
.about-cell:hover { transform: translateY(-8px); box-shadow: 0 26px 54px -24px rgba(22,19,14,0.3); }
.about-cell::before {
  content: ''; position: absolute; left: 0; top: 0; width: 3px; height: 0;
  background: var(--gold); transition: height 0.5s var(--ease);
}
.about-cell:hover::before { height: 100%; }
.about-cell .a-label {
  font-size: 12px; color: var(--gray); letter-spacing: 0.3em; margin-bottom: 18px;
}
.about-cell .a-text {
  font-family: var(--serif); font-size: clamp(18px, 1.6vw, 23px);
  font-weight: 600; line-height: 1.9; letter-spacing: 0.06em;
}
.about-cell.wide { grid-column: span 2; }
.about-team { margin-top: 84px; }
.about-team h3 {
  font-family: var(--serif); font-size: 26px; font-weight: 700;
  letter-spacing: 0.14em; margin-bottom: 40px; text-align: center;
}
.team-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 20px; max-width: 980px; margin: 0 auto;
}
.team-member {
  text-align: center; padding: 34px 12px;
  border: 1px solid var(--line); border-radius: 16px; background: #fff;
  transition: all 0.45s var(--ease); position: relative; overflow: hidden;
}
.team-member:hover { border-color: var(--gold); transform: translateY(-6px); }
.team-member .t-name {
  font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: 0.2em;
}
.team-member .t-role { margin-top: 8px; font-size: 12.5px; color: var(--gray); letter-spacing: 0.24em; }

/* ---------- 加入我们 ---------- */
.sec-join { background: var(--paper); padding-top: 40px; }
.join-card {
  position: relative; border-radius: 28px; overflow: hidden;
  background: var(--ink); color: var(--paper);
  padding: clamp(64px, 8vw, 110px) clamp(36px, 7vw, 110px);
  text-align: center;
}
.join-card::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 85% 10%, rgba(179,133,77,0.28), transparent 60%),
    radial-gradient(ellipse 50% 70% at 10% 95%, rgba(179,133,77,0.18), transparent 60%);
}
.join-card > * { position: relative; z-index: 1; }
.join-en { color: var(--gold-light); font-size: 12px; letter-spacing: 0.5em; text-indent: 0.5em; margin-bottom: 24px; }
.join-title {
  font-family: var(--serif); font-size: clamp(38px, 5vw, 68px);
  font-weight: 700; letter-spacing: 0.14em; margin-bottom: 34px;
}
.join-text {
  max-width: 640px; margin: 0 auto; color: rgba(246,243,236,0.66);
  font-size: 15px; font-weight: 300; line-height: 2.3; letter-spacing: 0.1em;
}
.join-traits { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 44px; }
.join-traits span {
  font-family: var(--serif); font-size: 15px; letter-spacing: 0.2em;
  border: 1px solid rgba(246,243,236,0.28); border-radius: 999px;
  padding: 10px 28px; color: rgba(246,243,236,0.85);
  transition: all 0.4s var(--ease);
}
.join-traits span:hover { border-color: var(--gold); color: var(--gold-light); transform: translateY(-3px); }
.join-mail {
  display: inline-block; margin-top: 52px;
  background: var(--gold); color: #fff; border-radius: 999px;
  padding: 16px 52px; font-size: 15px; letter-spacing: 0.18em;
  transition: all 0.4s var(--ease); box-shadow: 0 16px 36px -14px rgba(179,133,77,0.7);
}
.join-mail:hover { background: var(--gold-light); transform: translateY(-3px); }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: rgba(246,243,236,0.62); padding: 90px 0 44px; }
.footer-top {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 48px; padding-bottom: 56px; border-bottom: 1px solid rgba(246,243,236,0.1);
  flex-wrap: wrap;
}
.footer-brand .f-logo {
  font-family: var(--serif); color: var(--paper); font-size: 30px;
  font-weight: 700; letter-spacing: 0.2em;
}
.footer-brand .f-logo-sub { font-size: 10px; letter-spacing: 0.42em; color: rgba(246,243,236,0.4); margin-top: 8px; }
.footer-brand .f-slogan { margin-top: 26px; font-size: 14px; letter-spacing: 0.14em; font-weight: 300; }
.footer-contact { display: flex; flex-direction: column; gap: 14px; font-size: 14px; letter-spacing: 0.1em; }
.footer-contact b { color: rgba(246,243,236,0.4); font-weight: 400; font-size: 12px; letter-spacing: 0.3em; }
.footer-contact a:hover { color: var(--gold-light); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 34px; font-size: 12px; letter-spacing: 0.12em;
  color: rgba(246,243,236,0.38); flex-wrap: wrap; gap: 12px;
}
.footer-bottom a:hover { color: var(--gold-light); }

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(46px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .book-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-layout { grid-template-columns: 1fr; gap: 52px; }
  .media-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .sec { padding: 90px 0; }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 48px; }
  .sec-head::after { display: none; }
  .sec-lead { margin-left: 0; text-align: left; }
  .nav-menu {
    position: fixed; inset: 0; background: rgba(22,19,14,0.98);
    flex-direction: column; justify-content: center; gap: 34px;
    opacity: 0; visibility: hidden; transition: all 0.45s var(--ease);
  }
  .nav-menu.open { opacity: 1; visibility: visible; }
  .nav-menu a { color: var(--paper) !important; font-size: 21px; font-family: var(--serif); }
  .nav-burger { display: flex; z-index: 101; }
  .nav-burger.open span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); background: var(--paper); }
  .nav-burger.open span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); background: var(--paper); }
  .nav.solid .nav-burger span { background: var(--ink); }
  .book-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .book-cover { padding: 20px 16px; }
  .book-cover .b-title { font-size: 18px; }
  .media-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-cell.wide { grid-column: span 1; }
  .biz-imgs { grid-template-columns: 1fr; }
  .biz-img:nth-child(2) { transform: none; }
  .footer-top { flex-direction: column; }
}