*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #faf8f5;
  color: #2c2c2c;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16.5px;
  line-height: 1.75;
}

img {
  max-width: 100%;
  border: 0;
}

a {
  color: #b33a1a;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
.serif {
  font-family: Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun", serif;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #2c2c2c;
}

h1 {
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  line-height: 1.28;
  margin: 0 0 0.7rem;
}

h2 {
  font-size: clamp(1.28rem, 2.2vw, 1.7rem);
  line-height: 1.35;
  margin: 0 0 0.85rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid #d9d1c7;
}

h3 {
  font-size: 1.08rem;
  margin: 1.1rem 0 0.4rem;
}

p {
  margin: 0 0 0.95rem;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}

code,
.file {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
  background: #f3eee6;
  border: 1px solid #d9d1c7;
  padding: 0 0.28em;
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.longform {
  width: min(680px, calc(100% - 40px));
  margin: 0 auto;
}

.masthead {
  background: #faf8f5;
  border-bottom: 1px solid #d9d1c7;
}

.masthead-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0 0.85rem;
}

.brand {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 1.55rem;
  color: #2c2c2c;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.brand:hover {
  text-decoration: none;
  color: #b33a1a;
}

.issue {
  color: #6a6258;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid #d9d1c7;
}

.tabs a {
  color: #2c2c2c;
  text-decoration: none;
  padding: 0.72rem 1.15rem 0.62rem;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  border-bottom: 3px solid transparent;
}

.tabs a:hover {
  color: #b33a1a;
  text-decoration: none;
}

.tabs a.current {
  color: #b33a1a;
  border-bottom-color: #b33a1a;
}

.hero {
  display: grid;
  grid-template-columns: 68% 32%;
  gap: 0;
  padding: 2.1rem 0 1.6rem;
  border-bottom: 1px solid #d9d1c7;
}

.hero-copy {
  padding-right: 2.2rem;
  border-right: 1px solid #d9d1c7;
}

.kicker {
  display: block;
  color: #b33a1a;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}

.dek {
  font-size: 1.02rem;
  color: #3d3a35;
  margin-bottom: 1.05rem;
}

.hero-spec {
  padding: 0.15rem 0 0 1.6rem;
}

.hero-spec h2,
.hero-spec .spec-title {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  border: 0;
  padding: 0;
}

.hero-spec dl {
  margin: 0;
}

.hero-spec dt {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: #b33a1a;
  margin-top: 0.85rem;
}

.hero-spec dt:first-child {
  margin-top: 0;
}

.hero-spec dd {
  margin: 0.15rem 0 0;
  color: #3d3a35;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin: 1.1rem 0 0.4rem;
}

.btn-dl,
.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid #b33a1a;
  cursor: pointer;
  font: inherit;
  font-size: 0.95rem;
  padding: 0.62rem 1.05rem;
  text-decoration: none;
}

.btn-dl {
  background: #b33a1a;
  color: #faf8f5;
}

.btn-dl:hover {
  background: #8f2d14;
  text-decoration: none;
}

.btn-line {
  background: transparent;
  color: #b33a1a;
}

.btn-line:hover {
  background: #f3eee6;
  text-decoration: none;
}

button.btn-dl,
button.btn-line {
  appearance: none;
}

.note {
  font-size: 0.9rem;
  color: #5c564d;
}

.section {
  padding: 2rem 0 0.4rem;
}

.compare-wrap {
  overflow-x: auto;
  border: 1px solid #d9d1c7;
  background: #fffdf9;
}

.compare-wrap table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.compare-wrap th,
.compare-wrap td {
  border-right: 1px solid #d9d1c7;
  border-bottom: 1px solid #d9d1c7;
  padding: 0.72rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.compare-wrap th {
  background: #f3eee6;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
}

.compare-wrap tr:last-child td {
  border-bottom: 0;
}

.compare-wrap th:last-child,
.compare-wrap td:last-child {
  border-right: 0;
}

.split {
  display: grid;
  grid-template-columns: 1.45fr 0.85fr;
  gap: 0;
  border-top: 1px solid #d9d1c7;
}

.split-main {
  padding: 0 2rem 0.4rem 0;
  border-right: 1px solid #d9d1c7;
}

.split-panel {
  padding: 0 0 1rem 1.6rem;
}

.panel-box {
  border: 1px solid #d9d1c7;
  background: #fffdf9;
  padding: 1rem 1.1rem 0.35rem;
}

.panel-box h3 {
  margin-top: 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid #d9d1c7;
}

.panel-box li {
  margin-bottom: 0.45rem;
}

.dl-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid #d9d1c7;
}

.dl-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid #d9d1c7;
}

.dl-row svg {
  width: 40px;
  height: 40px;
  display: block;
}

.dl-row h3 {
  margin: 0 0 0.2rem;
}

.dl-row p {
  margin: 0;
  color: #5c564d;
  font-size: 0.95rem;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1.1rem;
  padding: 0 0 1.15rem;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 92px;
  top: 0.45rem;
  bottom: 0;
  width: 1px;
  background: #d9d1c7;
}

.timeline time {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.88rem;
  color: #b33a1a;
  padding-top: 0.1rem;
}

.timeline h3 {
  margin: 0 0 0.3rem;
}

.timeline p {
  margin: 0;
  color: #3d3a35;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 2.2rem;
}

.faq-item {
  padding: 0.85rem 0 0.95rem;
  border-bottom: 1px solid #d9d1c7;
}

.faq-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
}

.faq-item p {
  margin: 0;
  color: #3d3a35;
}

.risk-block {
  border: 1px solid #d9d1c7;
  background: #fffdf9;
  padding: 1.15rem 1.25rem 0.35rem;
}

.cta-bar {
  border-top: 1px solid #d9d1c7;
  border-bottom: 1px solid #d9d1c7;
  padding: 1rem 0 1.15rem;
  margin: 1.2rem 0 1.4rem;
}

.site-foot {
  margin-top: 2.4rem;
  padding: 1.4rem 0 2rem;
  border-top: 2px solid #2c2c2c;
  color: #5c564d;
  font-size: 0.9rem;
}

.site-foot p {
  margin: 0 0 0.45rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 860px) {
  .hero,
  .split,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .split-main {
    padding-right: 0;
    border-right: 0;
    padding-bottom: 1.2rem;
  }

  .hero-spec,
  .split-panel {
    padding-left: 0;
  }

  .dl-row {
    grid-template-columns: 40px 1fr;
  }

  .dl-row .btn-dl,
  .dl-row .btn-line {
    grid-column: 1 / -1;
    justify-content: center;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .timeline li::before {
    display: none;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .tabs a {
    padding: 0.65rem 0.7rem 0.55rem;
    letter-spacing: 0.04em;
  }

  .masthead-inner {
    flex-direction: column;
    gap: 0.25rem;
  }
}