@charset "UTF-8";

:root {
  --paper: #f5efe0;
  --paper-2: #efe7d5;
  --paper-3: #fbf7ec;
  --ink: #2e4b3f;
  --ink-deep: #1f352c;
  --ink-soft: #4d6357;
  --muted: #6d7a6c;
  --line: #cfc6ad;
  --seal: #a8443a;
  --shell: 1180px;
  --header-height: 70px;
  --serif: "Songti SC", "SimSun", "STSong", "Noto Serif SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
img { display: block; max-width: 100%; height: auto; }
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(--seal); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--seal);
  font-family: var(--serif);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  line-height: 1.4;
}
.eyebrow::before { width: 18px; height: 1px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 239, 224, .95);
  backdrop-filter: blur(10px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 16px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-family: var(--serif); font-size: 21px; font-weight: 700; letter-spacing: 2px; }
.brand img { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 4px; object-fit: contain; background: var(--paper-3); }
.brand-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-family: var(--serif);
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; border-bottom: 1px solid transparent; color: var(--ink-soft); font-family: var(--serif); font-size: 13.5px; letter-spacing: 1px; white-space: nowrap; }
.primary-nav a:hover { border-bottom-color: var(--seal); color: var(--ink-deep); }
.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;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 1.4px;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--ink); }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 2px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 1.5px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.2px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.2px) rotate(-45deg); }

/* hero: ink mountains, vertical poem, role card */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 420px at 70% -10%, rgba(255, 255, 255, .85), transparent 70%),
    linear-gradient(180deg, var(--paper-3) 0%, var(--paper) 62%, var(--paper-2) 100%);
}
.ink-scene { position: absolute; right: 0; bottom: 0; left: 0; height: 66%; overflow: hidden; pointer-events: none; }
.ink-scene i { position: absolute; bottom: -12%; background: linear-gradient(180deg, rgba(46, 75, 63, .16), rgba(46, 75, 63, .05)); }
.ink-scene i:nth-child(1) {
  left: -8%;
  width: 62%;
  height: 88%;
  clip-path: polygon(0 100%, 0 58%, 16% 40%, 28% 52%, 44% 22%, 62% 46%, 78% 30%, 100% 62%, 100% 100%);
}
.ink-scene i:nth-child(2) {
  right: -6%;
  width: 58%;
  height: 100%;
  background: linear-gradient(180deg, rgba(46, 75, 63, .1), rgba(46, 75, 63, .02));
  clip-path: polygon(0 100%, 0 66%, 18% 44%, 34% 58%, 52% 26%, 70% 52%, 86% 38%, 100% 56%, 100% 100%);
}
.ink-scene i:nth-child(3) {
  bottom: -4%;
  left: 20%;
  width: 70%;
  height: 46%;
  background: linear-gradient(180deg, rgba(46, 75, 63, .12), rgba(46, 75, 63, .04));
  clip-path: polygon(0 100%, 0 62%, 12% 46%, 26% 60%, 40% 34%, 58% 58%, 74% 42%, 90% 60%, 100% 48%, 100% 100%);
}
.hero::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(46, 75, 63, .1) .6px, transparent .6px);
  background-size: 7px 7px;
  opacity: .5;
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 156px;
  grid-template-areas: "card copy poem";
  align-items: end;
  gap: clamp(20px, 3vw, 44px);
  padding: 58px 0 0;
}
.hero-copy { grid-area: copy; padding-bottom: 46px; min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 2px;
}
.hero-kicker b {
  padding: 2px 7px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-size: 9.5px;
  letter-spacing: 1.4px;
}
.hero h1 {
  margin: 0;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: clamp(56px, 8vw, 104px);
  font-weight: 700;
  letter-spacing: clamp(2px, 1vw, 12px);
  line-height: 1.05;
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(17px, 2vw, 23px);
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.5;
}
.hero-lead { max-width: 470px; margin: 12px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.6px;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.button-primary { background: var(--ink); color: var(--paper); }
.button-primary:hover { background: var(--ink-deep); transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 32px; }
.text-link { color: var(--seal); border-bottom: 1px dashed rgba(168, 68, 58, .45); font-family: var(--serif); font-size: 13px; letter-spacing: 1px; }
.text-link span { display: inline-block; margin-left: 4px; }
.poem {
  grid-area: poem;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  height: 322px;
  padding: 0 0 46px;
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 5px;
  writing-mode: vertical-rl;
  text-orientation: upright;
}
.poem span:first-child { color: var(--seal); }
.hero-card {
  grid-area: card;
  position: relative;
  margin: 0 0 46px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper-3);
  padding: 8px 8px 0;
  box-shadow: 0 18px 36px rgba(46, 75, 63, .14);
}
.hero-card::before {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--seal);
  color: var(--seal);
  content: "语";
  font-family: var(--serif);
  font-size: 20px;
  line-height: 44px;
  text-align: center;
  background: rgba(245, 239, 224, .9);
}
.hero-card img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; object-position: center 12%; }
.hero-card figcaption { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 10px 4px 12px; border-top: 1px solid var(--line); }
.hero-card figcaption b { font-family: var(--serif); font-size: 15px; letter-spacing: 2px; }
.hero-card figcaption span { color: var(--muted); font-size: 11px; letter-spacing: 1px; }
.hero-ledger {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 30px;
  padding: 16px 0 20px;
  border-top: 1px solid var(--line);
}
.hero-ledger p { margin: 0; color: var(--ink-soft); font-family: var(--serif); font-size: 12px; letter-spacing: 1.4px; }
.hero-ledger b { margin-right: 6px; color: var(--ink-deep); font-size: 17px; }
.hero-ledger .ledger-note { margin-left: auto; color: var(--seal); }

/* features: four tall cards */
.features { padding: 70px 0 74px; border-bottom: 1px solid var(--line); background: var(--paper-3); }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; color: var(--ink-deep); font-family: var(--serif); font-size: clamp(24px, 2.7vw, 34px); font-weight: 700; letter-spacing: 1.5px; line-height: 1.35; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 280px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 6px; font-family: var(--serif); letter-spacing: 1px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.feature-card {
  position: relative;
  padding: 26px 24px 24px 74px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(180deg, #fffdf6, var(--paper));
}
.feature-no {
  position: absolute;
  top: 24px;
  left: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-family: var(--serif);
  font-size: 15px;
}
.feature-card h3 { margin: 0 0 8px; font-family: var(--serif); font-size: 18px; font-weight: 700; letter-spacing: 1.4px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.9; }

/* shots: alternating rows */
.shots { padding: 70px 0 74px; }
.shot-rows { border-top: 1px solid var(--line); }
.shot-row {
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr);
  align-items: center;
  gap: clamp(22px, 4vw, 54px);
  padding: 26px 0;
  margin: 0;
  border-bottom: 1px solid var(--line);
}
.shot-row img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; object-position: center 10%; border: 1px solid var(--line); border-radius: 2px; background: var(--paper-3); }
.shot-row:nth-child(even) { grid-template-columns: minmax(0, 1fr) 288px; }
.shot-row:nth-child(even) img { order: 2; }
.shot-row:nth-child(even) figcaption { order: 1; text-align: right; }
.shot-row figcaption { display: flex; flex-direction: column; gap: 8px; }
.shot-row figcaption b { color: var(--seal); font-family: var(--serif); font-size: 13px; font-weight: 700; letter-spacing: 2px; }
.shot-row figcaption span { color: var(--ink-soft); font-size: 14px; line-height: 1.9; }

/* faq */
.faq { padding: 68px 0 74px; border-top: 1px solid var(--line); background: var(--paper-3); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .74fr) minmax(0, 1.26fr); gap: clamp(24px, 4vw, 50px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); 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: 16px; padding: 16px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-family: var(--serif); font-size: 15px; font-weight: 700; letter-spacing: .6px; }
.faq-list summary i { position: relative; flex: none; width: 20px; height: 20px; border: 1px solid var(--line); }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1px;
  content: "";
  background: var(--seal);
  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 30px 16px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

/* reviews: three columns */
.reviews { padding: 70px 0 76px; }
.review-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 18px 18px 16px; border: 1px solid var(--line); border-radius: 2px; background: linear-gradient(180deg, #fffdf7, var(--paper)); }
.review-meta { display: flex; flex-direction: column; gap: 2px; padding-bottom: 8px; margin-bottom: 9px; border-bottom: 1px solid var(--line); }
.review-meta b { font-family: var(--serif); font-size: 14px; font-weight: 700; letter-spacing: 1px; }
.review-meta time { color: #8d8874; font-size: 10px; letter-spacing: .4px; }
.review-card p { margin: 0; color: var(--ink-soft); font-size: 12.5px; line-height: 1.85; }

/* steps: vertical with seals */
.steps { padding: 66px 0 72px; border-top: 1px solid var(--line); background: var(--paper-3); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step-list li { display: grid; grid-template-columns: 44px minmax(0, 1fr); align-items: start; gap: 14px; padding: 22px 22px 22px 0; }
.step-list li + li { padding-left: 22px; border-left: 1px solid var(--line); }
.step-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-family: var(--serif);
  font-size: 17px;
}
.step-list h3 { margin: 4px 0 5px; font-family: var(--serif); font-size: 17px; font-weight: 700; letter-spacing: 1.4px; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.85; }

/* download */
.download { padding: 26px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px 34px;
  padding: 44px clamp(24px, 5vw, 54px);
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 253, 246, .9), var(--paper));
}
.download .eyebrow { color: var(--seal); }
.download h2 { max-width: 620px; }
.download-inner > p { grid-column: 1; max-width: 520px; margin: 0; color: var(--muted); font-size: 13.5px; }
.download-inner .button { grid-column: 2; grid-row: 1 / span 2; justify-self: end; }
.download-notes { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 18px 0 0; margin: 8px 0 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: var(--ink-soft); font-family: var(--serif); font-size: 11px; letter-spacing: .8px; }
.download-notes li::before { margin-right: 7px; color: var(--seal); content: "﹅"; }

/* footer */
.site-footer { padding: 40px 0 48px; border-top: 1px solid var(--line); background: var(--paper-2); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 40px; align-items: start; }
.footer-brand strong { font-family: var(--serif); font-size: 18px; font-weight: 700; letter-spacing: 1.6px; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: var(--ink-soft); font-family: var(--serif); font-size: 12.5px; letter-spacing: .8px; }
.footer-nav a:hover { color: var(--seal); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #8a8677; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1040px) {
  .hero-grid { grid-template-columns: 252px minmax(0, 1fr) 132px; gap: 22px; }
  .poem { font-size: 12.5px; letter-spacing: 4px; height: 300px; }
  .review-list { grid-template-columns: repeat(2, 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 24px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 14px 24px rgba(46, 75, 63, .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: minmax(0, 1fr) 104px; grid-template-areas: "copy poem" "card card"; align-items: start; padding-top: 36px; gap: 8px 18px; }
  .hero-copy { padding-bottom: 10px; }
  .poem { height: 250px; padding-bottom: 0; font-size: 12px; gap: 8px; }
  .hero-card { justify-self: start; width: min(100%, 300px); margin: 6px 0 26px; }
  .feature-grid { grid-template-columns: 1fr; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .shot-row, .shot-row:nth-child(even) { grid-template-columns: 190px minmax(0, 1fr); gap: 20px; }
  .shot-row:nth-child(even) img { order: 0; }
  .shot-row:nth-child(even) figcaption { order: 0; text-align: left; }
  .step-list { grid-template-columns: 1fr; }
  .step-list li { padding: 20px 0; }
  .step-list li + li { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .download-inner { grid-template-columns: 1fr; }
  .download-inner .button { grid-column: 1; grid-row: auto; justify-self: start; margin-top: 8px; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(44px, 15vw, 62px); letter-spacing: 3px; }
  .hero-subtitle { font-size: 16px; letter-spacing: 1px; }
  .hero-grid { grid-template-columns: 1fr; grid-template-areas: "copy" "poem" "card"; }
  .poem { display: none; }
  .review-list { grid-template-columns: 1fr; }
  .shot-row, .shot-row:nth-child(even) { grid-template-columns: 1fr; gap: 12px; }
  .shot-row img { max-width: 240px; }
  .hero-ledger { gap: 8px 18px; }
  .hero-ledger .ledger-note { margin-left: 0; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .feature-card { padding: 22px 20px 20px 62px; }
  .feature-no { top: 20px; left: 20px; width: 28px; height: 28px; font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-seal { display: none; }
  .nav-actions { gap: 6px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; letter-spacing: .6px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 40px; }
  .button { width: 100%; }
}