@charset "UTF-8";

:root {
  --maroon: #8C2F39;
  --maroon-deep: #6B222B;
  --cream: #F6EFE4;
  --paper: #FFFBF3;
  --ink: #241C1A;
  --muted: #7C6A62;
  --line: rgba(140, 47, 57, .2);
  --shell: 1170px;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Songti SC", "SimSun", "Microsoft YaHei", serif;
  font-size: 16px;
  line-height: 1.75;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--maroon); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  color: var(--maroon);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.6px;
}
.eyebrow::before { width: 24px; height: 3px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 239, 228, .95);
  backdrop-filter: blur(12px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 44px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-family: "Microsoft YaHei", sans-serif; font-size: 21px; font-weight: 900; letter-spacing: 1px; }
.brand img { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 3px; object-fit: cover; background: var(--paper); }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 2px;
  background: var(--maroon);
  color: var(--cream);
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(11px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; border-bottom: 2px solid transparent; color: #6B5A53; font-family: "Microsoft YaHei", sans-serif; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--maroon); color: var(--ink); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  gap: 7px;
  padding: 0 17px;
  border: 1px solid var(--maroon);
  border-radius: 3px;
  background: var(--maroon);
  color: var(--cream);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}
.nav-download:hover { background: transparent; color: var(--maroon); }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 3px; background: var(--paper); cursor: pointer; }
.menu-toggle span { display: block; width: 17px; height: 2px; margin: 5px auto; background: var(--maroon); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 0 0 46px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(520px 340px at 92% 8%, rgba(140, 47, 57, .12), transparent 72%),
    var(--cream);
}
.spine-bar {
  display: flex;
  height: 58px;
  border-bottom: 1px solid var(--line);
  background: var(--maroon);
  color: var(--cream);
  overflow: hidden;
}
.spine-bar i {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-width: 0;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 3px;
  writing-mode: vertical-rl;
  text-orientation: upright;
  border-right: 1px solid rgba(246, 239, 228, .18);
}
.spine-bar i:nth-child(2n) { background: var(--maroon-deep); }
.spine-bar i:nth-child(3n) { opacity: .86; }
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) minmax(300px, .92fr);
  align-items: center;
  gap: clamp(18px, 3vw, 44px);
  padding: 44px 0 0;
}
.hero-vertical {
  margin: 0;
  color: var(--maroon);
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 900;
  letter-spacing: 6px;
  line-height: 1.15;
  writing-mode: vertical-rl;
  text-orientation: upright;
  border-right: 2px solid var(--maroon);
  padding-right: 12px;
  height: 100%;
  display: flex;
  align-items: center;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  margin: 0 0 14px;
  color: #8B7468;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 2.2px;
}
.hero-subtitle {
  margin: 0;
  color: var(--maroon);
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 900;
  line-height: 1.4;
}
.hero-lead { max-width: 400px; margin: 12px 0 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 14px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-weight: 900;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.button-primary { background: var(--maroon); color: var(--cream); }
.button-primary:hover { background: var(--maroon-deep); transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 32px; font-size: 15px; }
.text-link { color: var(--maroon); border-bottom: 1px dashed rgba(140, 47, 57, .45); font-family: "Microsoft YaHei", sans-serif; font-size: 13px; font-weight: 700; }
.text-link span { display: inline-block; margin-left: 4px; }

.hero-shelf {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-self: start;
}
.book-card {
  position: relative;
  margin: 0;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper);
  box-shadow: 5px 5px 0 rgba(140, 47, 57, .1);
}
.book-card img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; object-position: center 18%; }
.book-card figcaption {
  padding: 6px 2px 2px;
  color: #8B7468;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 10px;
  letter-spacing: .3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.book-b, .book-d { transform: translateY(26px); }

/* features */
.features { padding: 72px 0 76px; border-bottom: 1px solid var(--line); background: var(--paper); }
.section-heading { margin-bottom: 28px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.7vw, 34px); font-weight: 900; letter-spacing: .5px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 9px 0 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 290px); align-items: end; gap: 24px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-row { border-top: 1px solid var(--line); }
.feature-item {
  display: grid;
  grid-template-columns: 62px 190px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 20px 6px;
  border-bottom: 1px solid var(--line);
  transition: background .18s ease, padding-left .18s ease;
}
.feature-item:hover { padding-left: 14px; background: rgba(140, 47, 57, .05); }
.feature-no { color: var(--maroon); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; font-weight: 900; letter-spacing: 1.6px; }
.feature-item h3 { margin: 0; font-size: 17px; font-weight: 900; }
.feature-item p { margin: 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13px; line-height: 1.8; }

/* shots */
.shots { padding: 70px 0 88px; }
.poster-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; }
.poster-card { margin: 0; border: 1px solid var(--line); background: var(--paper); padding: 9px 9px 0; }
.poster-card:nth-child(even) { transform: translateY(22px); }
.poster-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 22%; }
.poster-card figcaption { display: flex; align-items: baseline; gap: 9px; padding: 10px 2px 12px; }
.poster-card figcaption b { color: var(--maroon); font-family: "Microsoft YaHei", sans-serif; font-size: 10px; }
.poster-card figcaption span { display: flex; flex-direction: column; font-size: 14px; font-weight: 900; line-height: 1.4; }
.poster-card figcaption small { color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 10.5px; font-weight: 400; }

/* faq */
.faq { padding: 68px 0 74px; border-top: 1px solid var(--line); background: var(--paper); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 52px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 24px); align-self: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid var(--line); background: var(--cream); }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  content: "";
  background: var(--maroon);
  transform: translate(-50%, -50%);
}
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-list details p { padding: 0 26px 16px 0; margin: 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13.2px; line-height: 1.85; }

/* reviews */
.reviews { padding: 68px 0 74px; }
.review-list { display: grid; gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card {
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line);
}
.review-meta { display: flex; flex-direction: column; gap: 4px; font-family: "Microsoft YaHei", sans-serif; }
.review-meta b { color: var(--maroon); font-size: 13px; font-weight: 900; }
.review-meta time { color: #A2908A; font-size: 10.5px; }
.review-card p { margin: 0; color: #4C403B; font-family: "Microsoft YaHei", sans-serif; font-size: 13px; line-height: 1.85; }

/* steps */
.steps { padding: 64px 0 70px; border-top: 1px solid var(--line); background: var(--paper); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.step-list li { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 12px; padding: 20px 18px; border: 1px solid var(--line); border-top: 4px solid var(--maroon); background: var(--cream); }
.step-list span { color: var(--maroon); font-family: "Microsoft YaHei", sans-serif; font-size: 22px; font-weight: 900; line-height: 1; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12.8px; line-height: 1.8; }

/* download */
.download { padding: 22px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 330px);
  align-items: center;
  gap: 26px;
  padding: 40px clamp(22px, 4vw, 50px);
  border-left: 14px solid var(--maroon);
  background: var(--paper);
  box-shadow: 8px 8px 0 rgba(140, 47, 57, .12);
}
.download h2 { max-width: 520px; }
.download-copy p:last-child { margin: 10px 0 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13.5px; }
.download-side { display: flex; flex-direction: column; align-items: flex-start; gap: 15px; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 0; margin: 0; list-style: none; }
.download-notes li { color: #8B7468; font-family: "Microsoft YaHei", sans-serif; font-size: 11px; }
.download-notes li::before { margin-right: 6px; content: "§"; color: var(--maroon); }

/* footer */
.site-footer { padding: 38px 0 46px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 36px; align-items: start; }
.footer-brand strong { font-size: 17px; font-weight: 900; letter-spacing: 1px; }
.footer-brand p { margin: 3px 0 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 7px 20px; }
.footer-nav a { color: #6B5A53; font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.footer-nav a:hover { color: var(--maroon); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 18px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #9A8880; font-family: "Microsoft YaHei", sans-serif; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 62px minmax(0, 1fr) minmax(270px, .9fr); }
  .feature-item { grid-template-columns: 50px 160px minmax(0, 1fr); }
  .review-card { grid-template-columns: 150px minmax(0, 1fr); }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 22px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--cream);
    box-shadow: 0 16px 24px rgba(36, 28, 26, .14);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero-grid { grid-template-columns: 1fr; padding-top: 30px; gap: 22px; }
  .hero-vertical {
    writing-mode: horizontal-tb;
    border-right: 0;
    border-left: 5px solid var(--maroon);
    padding: 0 0 0 12px;
    letter-spacing: 4px;
    font-size: 34px;
    display: block;
  }
  .hero-shelf { max-width: 460px; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .step-list { grid-template-columns: 1fr; }
  .download-inner { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .spine-bar { height: 44px; }
  .spine-bar i { font-size: 9px; letter-spacing: 2px; }
  .hero { padding-bottom: 34px; }
  .hero-vertical { font-size: 28px; }
  .hero-shelf { gap: 9px; }
  .book-b, .book-d { transform: translateY(16px); }
  .book-card { padding: 5px; }
  .feature-item { grid-template-columns: 40px minmax(0, 1fr); gap: 6px 10px; padding: 16px 2px; }
  .feature-item h3 { grid-column: 2; }
  .feature-item p { grid-column: 2; }
  .poster-row { gap: 10px; }
  .poster-card:nth-child(even) { transform: none; }
  .poster-card figcaption { padding: 8px 2px 10px; gap: 6px; }
  .review-card { grid-template-columns: 1fr; gap: 6px; padding: 14px 2px; }
  .review-meta { flex-direction: row; align-items: baseline; gap: 10px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .download-side { align-items: stretch; }
  .download .button { width: 100%; }
  .download-inner { border-left-width: 8px; box-shadow: 5px 5px 0 rgba(140, 47, 57, .12); }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 6px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 13px; height: 13px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero-subtitle { font-size: 18px; }
  .spine-bar i { font-size: 8px; letter-spacing: 1px; }
}