:root {
  --ink: #1c1d1b;
  --paper: #f5f3ee;
  --surface: #fffefb;
  --soft: #ebe8df;
  --line: #d6d2c8;
  --muted: #686660;
  --accent: #245744;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

body.modal-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  min-height: 76px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 max(28px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(218, 215, 207, 0.85);
  background: rgba(245, 243, 238, 0.92);
  backdrop-filter: blur(14px);
}

.brand,
.footer-brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand {
  width: fit-content;
}

.brand strong,
.footer-brand strong {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 13px;
}

.main-nav a {
  position: relative;
  padding: 26px 0 24px;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms var(--ease-out);
}

.main-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-contact {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.header-contact span {
  transition: transform 160ms var(--ease-out);
}

main,
.site-footer {
  width: min(1200px, calc(100% - 64px));
  margin: 0 auto;
}

.hero {
  display: grid;
  min-height: 660px;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.72fr);
  align-items: center;
  gap: clamp(64px, 8vw, 118px);
  padding: 112px 0 104px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 720px;
}

.section-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.hero h1,
.section-heading h2,
.about h2,
.payment-modal h2 {
  margin: 0;
  font-weight: 620;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(46px, 5.3vw, 72px);
  line-height: 1.16;
}

.hero-description {
  max-width: 620px;
  margin: 30px 0 34px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 13px 0 9px;
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
  font-weight: 650;
  transition: color 160ms ease, transform 140ms var(--ease-out);
}

.primary-button:active,
.pay-button:active,
.modal-dismiss:active {
  transform: scale(0.97);
}

.hero-side {
  align-self: center;
  display: grid;
  min-width: 0;
  gap: 18px;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1.7 / 1;
  margin: 0;
  overflow: hidden;
  background: #d8d5cc;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(22, 24, 21, 0.38));
  content: "";
  pointer-events: none;
}

.hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(0.98);
}

.hero-visual figcaption {
  position: absolute;
  z-index: 1;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.hero-brief {
  align-self: center;
  padding: 28px 30px 24px;
  border-top: 1px solid var(--ink);
  background: var(--soft);
}

.brief-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 12px;
}

.hero-brief ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-brief li {
  border-bottom: 1px solid var(--line);
}

.hero-brief li a {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  align-items: start;
  padding: 18px 0;
}

.hero-brief li span {
  color: var(--accent);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.hero-brief li strong {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.65;
}

.brief-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.insights {
  padding: 104px 0 116px;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.48fr);
  align-items: end;
  gap: 48px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--ink);
}

.section-heading .section-kicker,
.about .section-kicker,
.payment-modal .section-kicker {
  margin-bottom: 12px;
}

.section-heading h2,
.about h2 {
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.25;
}

.section-heading > p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.article-row {
  display: grid;
  grid-template-columns: 70px 176px minmax(0, 1fr);
  column-gap: 32px;
  row-gap: 18px;
  align-items: start;
  padding: 42px 0 44px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.article-meta span {
  color: var(--accent);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
}

.article-meta p {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.article-image {
  width: 100%;
  aspect-ratio: 1.42 / 1;
  margin: 0;
  overflow: hidden;
  background: var(--soft);
}

.article-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.68) contrast(0.95);
}

.article-image--left img {
  object-position: left center;
}

.article-image--center img {
  object-position: center center;
}

.article-image--right img {
  object-position: right center;
}

.article-body h3 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(22px, 2.25vw, 30px);
  font-weight: 620;
  line-height: 1.45;
  letter-spacing: -0.025em;
}

.article-body > p {
  max-width: 760px;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.pay-button {
  grid-column: 3;
  justify-self: start;
  display: grid;
  width: fit-content;
  justify-items: start;
  gap: 6px;
  margin-top: -4px;
  padding: 3px 0 8px;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: color 160ms ease, transform 140ms var(--ease-out);
}

.pay-button span {
  font-size: 13px;
  font-weight: 650;
}

.pay-button b {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}

.about {
  display: grid;
  grid-template-columns: 0.88fr 1fr;
  gap: 8vw;
  padding: 108px 0 118px;
  border-top: 1px solid var(--line);
}

.about-heading {
  align-self: start;
}

.about-copy {
  max-width: 640px;
}

.about-lead {
  margin: 0 0 20px;
  font-size: clamp(19px, 2vw, 25px);
  font-weight: 570;
  line-height: 1.65;
}

.about-copy > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.95;
}

.contact-list {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr 1.35fr;
  margin: 24px 0 0;
  border-top: 1px solid var(--ink);
}

.contact-list > div {
  padding: 20px 28px 0 0;
}

.contact-list dt {
  color: var(--muted);
  font-size: 11px;
}

.contact-list dd {
  margin: 9px 0 0;
  font-size: 13px;
  line-height: 1.7;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 34px 0 40px;
  border-top: 1px solid var(--line);
}

.footer-brand p,
.footer-legal p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.footer-legal {
  text-align: right;
}

.modal-backdrop {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(24, 25, 23, 0.58);
  backdrop-filter: blur(5px);
  animation: fade-in 160ms var(--ease-out);
}

.modal-backdrop[hidden] {
  display: none;
}

.payment-modal {
  position: relative;
  width: min(430px, 100%);
  padding: 34px 36px 30px;
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
  text-align: left;
  animation: modal-in 200ms var(--ease-out);
}

.payment-modal h2 {
  padding-right: 38px;
  font-size: 32px;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font-size: 22px;
  font-weight: 350;
}

.modal-article-title {
  margin: 14px 0 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.qr-image-frame {
  width: 202px;
  margin: 0 auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
}

.qr-image-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.qr-note {
  margin: 14px 0 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  text-align: center;
}

.payment-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
  text-align: center;
}

.modal-dismiss {
  display: block;
  width: 100%;
  margin-top: 22px;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 650;
  transition: opacity 160ms ease, transform 140ms var(--ease-out);
}

.pay-button:focus-visible,
.modal-close:focus-visible,
.modal-dismiss:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (hover: hover) and (pointer: fine) {
  .main-nav a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .header-contact:hover span {
    transform: translate(2px, -2px);
  }

  .primary-button:hover,
  .pay-button:hover {
    color: var(--accent);
  }

  .hero-brief li a:hover strong {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
  }

  .modal-dismiss:hover {
    opacity: 0.86;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .main-nav {
    order: 3;
    grid-column: 1 / -1;
    justify-content: center;
    width: 100%;
    gap: 30px;
    border-top: 1px solid var(--line);
  }

  .main-nav a {
    padding: 12px 0;
  }

  .main-nav a::after {
    bottom: 6px;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 52px;
    padding: 84px 0 76px;
  }

  .hero-side {
    width: 100%;
  }

  .hero-brief {
    width: 100%;
  }

  .article-row {
    grid-template-columns: 60px 140px minmax(0, 1fr);
  }

  .pay-button {
    grid-column: 3;
    justify-self: start;
    justify-items: start;
    margin-top: -4px;
    text-align: left;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .contact-list {
    grid-column: auto;
    grid-template-columns: 1fr;
    margin-top: 0;
  }

  .contact-list > div {
    padding: 17px 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 62px;
    padding: 0 20px;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
    font-size: 13px;
  }

  .brand strong {
    font-size: 15px;
  }

  .header-contact {
    font-size: 11px;
  }

  .main-nav {
    gap: 28px;
    font-size: 12px;
  }

  main,
  .site-footer {
    width: min(100% - 40px, 1200px);
  }

  .hero {
    gap: 42px;
    padding: 66px 0 62px;
  }

  .hero h1 {
    font-size: clamp(38px, 11vw, 48px);
  }

  .hero-description {
    margin: 24px 0 28px;
    font-size: 14px;
  }

  .hero-brief {
    padding: 24px 22px 20px;
  }

  .hero-visual {
    aspect-ratio: 1.55 / 1;
  }

  .insights {
    padding: 76px 0 86px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-bottom: 26px;
  }

  .section-heading h2,
  .about h2 {
    font-size: 34px;
  }

  .article-row {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 30px 0 32px;
  }

  .article-image {
    aspect-ratio: 2.2 / 1;
  }

  .article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .article-meta p {
    margin: 0;
  }

  .article-body h3 {
    font-size: 22px;
  }

  .pay-button {
    grid-column: auto;
    margin-top: 2px;
  }

  .about {
    gap: 34px;
    padding: 76px 0 84px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 24px;
    padding: 30px 0 34px;
  }

  .footer-legal {
    text-align: left;
  }

  .payment-modal {
    padding: 30px 22px 24px;
  }

  .payment-modal h2 {
    font-size: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}