:root {
  --cream: #faf7f0;
  --cream-2: #f2ece0;
  --card: #fffdf8;
  --olive: #4b5d34;
  --olive-deep: #384627;
  --olive-soft: #e7ecd9;
  --brick: #c4643b;
  --brick-soft: #f3ded3;
  --ink: #2b2a24;
  --muted: #6f7263;
  --rule: #ddd5c3;
  --shell: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(720px 420px at 92% -10%, rgba(196, 100, 59, 0.1), transparent 62%),
    radial-gradient(520px 360px at -6% 38%, rgba(75, 93, 52, 0.1), transparent 60%),
    var(--cream);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 800; }

.page-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(250, 247, 240, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--olive);
}

.nav-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--olive-deep);
  white-space: nowrap;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 4px;
  object-fit: cover;
  border: 2px solid var(--olive);
}

.primary-nav { margin-left: auto; }

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14.5px;
  color: var(--muted);
}

.primary-nav a {
  display: inline-block;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.primary-nav a:hover {
  color: var(--olive-deep);
  border-bottom-color: var(--brick);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 5px;
  background: var(--olive);
  color: #fdfbf5;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 3px 3px 0 var(--olive-deep);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.nav-download svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-download:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--olive-deep);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--card);
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 3px auto;
  border-radius: 2px;
  background: var(--olive-deep);
}

/* ---------- hero ---------- */
.hero {
  padding: 54px 0 48px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 44px;
  align-items: center;
}

.hero-kicker {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--brick);
  border-left: 4px solid var(--brick);
  padding-left: 9px;
}

.hero h1 {
  margin: 14px 0 12px;
  font-size: clamp(33px, 4.6vw, 52px);
  color: var(--olive-deep);
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  color: var(--brick);
}

.hero-lead {
  margin-top: 16px;
  max-width: 480px;
  color: var(--muted);
  font-size: 15.4px;
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 5px;
  font-weight: 800;
  font-size: 15.5px;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button-primary {
  background: var(--brick);
  color: #fffaf4;
  box-shadow: 4px 4px 0 #9d4a28;
}

.button-primary:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 #9d4a28;
}

.button-large {
  padding: 15px 30px;
  font-size: 16.5px;
}

.text-link {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--olive);
  border-bottom: 2px dotted var(--olive);
  padding-bottom: 2px;
}

.text-link:hover { color: var(--brick); border-bottom-color: var(--brick); }

.hero-tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}

.hero-tags li {
  padding: 4px 12px;
  border-radius: 3px;
  background: var(--card);
  border: 1px solid var(--rule);
}

.hero-tags b { color: var(--olive); }

/* ---------- hero bench board ---------- */
.bench-board {
  background: var(--card);
  border: 2px solid var(--olive);
  border-radius: 8px;
  padding: 16px 16px 12px;
  box-shadow: 8px 8px 0 var(--olive-soft);
}

.bench-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--rule);
}

.bench-head p {
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--olive-deep);
}

.bench-head span {
  font-size: 11px;
  color: var(--brick);
  background: var(--brick-soft);
  border-radius: 3px;
  padding: 2px 7px;
}

/* 台面：一条横向木台 + 台面上三个工具块 */
.bench-top {
  position: relative;
  margin: 14px 0 0;
  padding: 20px 12px 16px;
  background: linear-gradient(180deg, var(--olive), var(--olive-deep));
  border-radius: 6px 6px 2px 2px;
  box-shadow: inset 0 -6px 0 rgba(0, 0, 0, 0.18);
}

.bench-top::before {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  top: -6px;
  height: 6px;
  border-radius: 3px 3px 0 0;
  background: #8e9b74;
}

.bench-tools {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}

.bench-tool {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 9px 8px 10px;
  background: var(--cream);
  border-radius: 4px;
  border-bottom: 3px solid var(--brick);
}

.bench-tool b {
  font-size: 12.5px;
  color: var(--olive-deep);
}

.bench-tool small {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--brick);
}

.bench-tool em {
  font-style: normal;
  font-size: 10px;
  color: var(--muted);
  line-height: 1.5;
}

/* 台面下刻度 */
.bench-ruler {
  position: relative;
  height: 30px;
  margin-top: 8px;
  border-top: 2px solid var(--olive);
  background: repeating-linear-gradient(90deg, var(--olive) 0 1px, transparent 1px 5.5%);
  background-position: 0 0;
  background-size: 100% 7px;
  background-repeat: repeat-x;
}

.bench-ruler span {
  position: absolute;
  top: 10px;
  transform: translateX(-50%);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.bench-foot {
  margin-top: 4px;
  padding-top: 9px;
  border-top: 1px dashed var(--rule);
  font-size: 11.5px;
  color: var(--muted);
}

/* ---------- section shared ---------- */
section { padding: 54px 0; }

.section-heading {
  max-width: 680px;
  margin-bottom: 28px;
}

.section-heading .eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 700;
  color: var(--brick);
  margin-bottom: 9px;
}

.section-heading h2 {
  font-size: clamp(23px, 2.8vw, 31px);
  color: var(--olive-deep);
}

.section-heading p:last-child {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14.4px;
}

.section-heading-split {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading-split > p {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13.4px;
  white-space: nowrap;
}

/* ---------- features / bench grid ---------- */
.features {
  background: var(--cream-2);
  border-top: 2px solid var(--rule);
  border-bottom: 2px solid var(--rule);
}

.bench-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.bench-grid article {
  position: relative;
  padding: 20px 20px 20px 26px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.bench-grid article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 5px;
  border-radius: 0 3px 3px 0;
  background: var(--olive);
}

.bench-grid article:nth-child(2n)::before { background: var(--brick); }

.bench-grid span {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--brick);
  margin-bottom: 4px;
}

.bench-grid h3 {
  font-size: 17.5px;
  color: var(--olive-deep);
  margin-bottom: 5px;
}

.bench-grid p {
  font-size: 13.7px;
  color: var(--muted);
}

/* ---------- shots ---------- */
.bench-shots {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.bench-shots figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 8px 8px 0;
  box-shadow: 4px 4px 0 var(--cream-2);
}

.bench-shots img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
  border-radius: 2px;
  background: var(--cream-2);
}

.bench-shots figcaption {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 2px 11px;
  font-size: 13px;
  font-weight: 700;
  color: var(--olive-deep);
}

.bench-shots figcaption b {
  font-size: 11px;
  color: var(--brick);
}

.bench-shots figcaption small {
  margin-left: auto;
  font-weight: 400;
  font-size: 10.5px;
  color: var(--muted);
}

.sample-note {
  margin-top: 16px;
  font-size: 12.4px;
  color: var(--muted);
}

/* ---------- faq ---------- */
.faq {
  background: var(--olive-deep);
  color: #f4f1e7;
}

.faq .section-heading h2 { color: #fdfbf4; }
.faq .section-heading .eyebrow { color: #f0b08c; }
.faq .section-heading p:last-child { color: #c3c9b0; }

.faq-rows {
  display: grid;
  gap: 9px;
  max-width: 920px;
}

.faq-rows details {
  border-radius: 4px;
  background: rgba(250, 247, 240, 0.06);
  border: 1px solid rgba(250, 247, 240, 0.16);
  padding: 0 18px;
  transition: background 0.18s ease;
}

.faq-rows details[open] { background: rgba(250, 247, 240, 0.11); }

.faq-rows summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
}

.faq-rows summary::-webkit-details-marker { display: none; }

.faq-rows summary h3 {
  flex: 1;
  font-size: 15.5px;
  color: #fdfbf4;
}

.faq-rows summary i {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brick);
}

.faq-rows summary i::before,
.faq-rows summary i::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: #fffaf4;
  border-radius: 2px;
  transform: translate(-50%, -50%);
}

.faq-rows summary i::before { width: 9px; height: 2px; }
.faq-rows summary i::after { width: 2px; height: 9px; transition: opacity 0.2s ease; }
.faq-rows details[open] summary i::after { opacity: 0; }

.faq-rows details > p {
  padding: 12px 0 16px;
  border-top: 1px dashed rgba(250, 247, 240, 0.2);
  font-size: 14px;
  color: #d8dccb;
}

/* ---------- reviews ---------- */
.reviews { border-top: 2px solid var(--rule); }

.note-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.review-card {
  padding: 16px 17px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  border-left: 4px solid var(--olive-soft);
}

.review-card:nth-child(3n + 2) { border-left-color: var(--brick-soft); }

.review-card > p {
  font-size: 13.8px;
  color: #454437;
}

.review-meta {
  margin-top: 12px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-top: 9px;
  border-top: 1px dashed var(--rule);
  font-size: 11px;
  color: var(--muted);
}

.review-meta b {
  font-size: 12px;
  color: var(--olive);
}

/* ---------- steps ---------- */
.steps { background: var(--cream-2); border-top: 2px solid var(--rule); }

.bench-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  counter-reset: step;
}

.bench-steps li {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.bench-steps li::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: 14px;
  width: 26px;
  height: 26px;
  border-right: 2px solid var(--olive-soft);
  border-bottom: 2px solid var(--olive-soft);
}

.bench-steps span {
  display: inline-block;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--brick);
}

.bench-steps h3 {
  font-size: 17.5px;
  margin: 2px 0 5px;
  color: var(--olive-deep);
}

.bench-steps p {
  font-size: 13.6px;
  color: var(--muted);
}

/* ---------- download ---------- */
.download { padding-bottom: 66px; }

.download-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  padding: 34px;
  border-radius: 6px;
  background:
    radial-gradient(400px 230px at 88% 0%, rgba(196, 100, 59, 0.22), transparent 66%),
    linear-gradient(120deg, #f7f1e4, #efe7d6);
  border: 2px solid var(--olive);
  box-shadow: 8px 8px 0 var(--olive-soft);
}

.download-copy { max-width: 520px; }

.download-copy .eyebrow {
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 700;
  color: var(--brick);
  margin-bottom: 8px;
}

.download-copy h2 {
  font-size: clamp(23px, 2.7vw, 30px);
  color: var(--olive-deep);
  margin-bottom: 8px;
}

.download-copy p { font-size: 14.4px; color: var(--muted); }

.download-act {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.download-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-size: 12px;
  color: var(--muted);
}

.download-notes li {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.download-notes li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brick);
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--olive-deep);
  color: #e9eddd;
  padding: 34px 0 30px;
  border-top: 4px solid var(--brick);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr) minmax(0, 0.8fr);
  gap: 22px 30px;
  align-items: start;
}

.footer-brand strong {
  display: block;
  font-size: 17px;
  color: #fdfbf4;
}

.footer-brand p {
  margin-top: 4px;
  font-size: 12.5px;
  color: #b8c0a5;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 13px;
  color: #c6cdb4;
}

.footer-nav a:hover { color: #f0b08c; }

.footer-meta {
  font-size: 12.5px;
  color: #b8c0a5;
  text-align: right;
}

.footer-meta a { color: #ddd6c3; }

.disclaimer {
  grid-column: 1 / -1;
  padding-top: 16px;
  border-top: 1px solid rgba(250, 247, 240, 0.16);
  font-size: 12px;
  line-height: 1.7;
  color: #a9b295;
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .bench-board { max-width: 520px; }
  .bench-shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .note-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { text-align: left; }
  .download-panel { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 900px) {
  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    display: none;
    background: var(--card);
    border-bottom: 2px solid var(--olive);
    padding: 8px 24px 14px;
  }

  .primary-nav.is-open { display: block; }

  .primary-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    font-size: 15px;
  }

  .primary-nav li { width: 100%; }

  .primary-nav a {
    display: block;
    padding: 11px 0;
    border-bottom: 1px dashed var(--rule);
    border-top: none;
  }

  .nav-shell { position: relative; flex-wrap: wrap; }
  .primary-nav { order: 4; flex-basis: 100%; }
  .nav-actions { margin-left: auto; }
  .menu-toggle { display: block; }
  .nav-download span { display: none; }
  .nav-download { padding: 10px 12px; }
}

@media (max-width: 640px) {
  .page-shell, .nav-shell { padding-left: 18px; padding-right: 18px; }
  section { padding: 42px 0; }
  .hero { padding: 38px 0 34px; }
  .bench-grid { grid-template-columns: minmax(0, 1fr); }
  .note-wall { grid-template-columns: minmax(0, 1fr); }
  .bench-steps { grid-template-columns: minmax(0, 1fr); }
  .section-heading-split { flex-direction: column; align-items: flex-start; gap: 6px; }
  .section-heading-split > p { white-space: normal; }
  .download-panel { padding: 26px 20px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .download-act { width: 100%; }
  .download-act .button { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
  .bench-shots { grid-template-columns: minmax(0, 1fr); }
  .brand span { font-size: 15px; }
  .bench-tools { gap: 5px; }
  .bench-tool { padding: 8px 6px 9px; }
  .bench-tool em { display: none; }
  .bench-board { padding: 13px 12px 10px; }
}