:root {
  --ink: #1c2430;
  --ink-soft: #3d4a5c;
  --muted: #6b7789;
  --line: #e4e8ef;
  --paper: #f7f8fb;
  --white: #ffffff;
  --spark: #d45a1a;
  --spark-deep: #b34712;
  --mist: #eef2f7;
  --sky: #dce8f4;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --space: clamp(1.25rem, 4vw, 2.5rem);
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  min-height: 100dvh;
  margin: 0;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1 0 auto;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  color: var(--spark);
}

.container {
  width: min(100% - 2 * var(--space), var(--max));
  margin-inline: auto;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--white) 92%, transparent);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
}

.brand-text > span {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: var(--spark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 0.4rem;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  background: var(--ink);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: min(62vh, 560px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 78% 28%, rgba(212, 90, 26, 0.18), transparent 55%),
    radial-gradient(ellipse 55% 45% at 18% 75%, rgba(120, 160, 200, 0.22), transparent 50%),
    linear-gradient(165deg, #f4f6fa 0%, #e8eef5 42%, #f7f1eb 100%);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 36, 48, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 36, 48, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 20%, transparent 75%);
}

.hero-visual {
  position: absolute;
  right: max(4vw, calc((100% - var(--max)) / 2));
  top: 14%;
  width: min(34vw, 360px);
  aspect-ratio: 1;
  z-index: -1;
  opacity: 0;
  animation: rise-in 1.1s var(--ease) 0.2s forwards;
}

.hero-visual svg {
  width: 100%;
  height: 100%;
}

.hero-content {
  width: min(100% - 2 * var(--space), var(--max));
  margin: 0 auto;
  padding: 4.5rem 0 3.5rem;
  max-width: 36rem;
  margin-left: max(var(--space), calc((100% - var(--max)) / 2));
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.06em;
  margin: 0 0 1rem;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) forwards;
}

.hero-title {
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  font-weight: 500;
  line-height: 1.45;
  margin: 0 0 0.85rem;
  color: var(--ink);
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.12s forwards;
}

.hero-desc {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 28rem;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.22s forwards;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.32s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1.35rem;
  font-size: 0.95rem;
  border-radius: 0.35rem;
  border: 1px solid transparent;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--spark);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--spark-deep);
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— Sections —— */
.section {
  padding: clamp(4rem, 9vw, 6.5rem) 0;
}

.section-alt {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--sky) 35%, var(--paper)), var(--paper));
}

.section-label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--spark);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}

.section-lead {
  margin: 0;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-head {
  margin-bottom: 2.75rem;
}

.focus-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.focus-list li {
  padding-top: 1.75rem;
  border-top: 1px solid transparent;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.focus-list li.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.focus-list h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.65rem;
  letter-spacing: 0.03em;
}

.focus-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about-copy p {
  margin: 0 0 1.1rem;
  color: var(--ink-soft);
}

.about-copy p:last-child {
  margin-bottom: 0;
}

.about-meta {
  display: grid;
  gap: 1.25rem;
  padding-top: 0.25rem;
}

.about-meta dt {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 0.25rem;
}

.about-meta dd {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.about-meta dd:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-hero {
  padding: 5rem 0 3rem;
  background:
    radial-gradient(ellipse 50% 60% at 90% 0%, rgba(212, 90, 26, 0.12), transparent 55%),
    linear-gradient(180deg, #eef2f7, var(--paper));
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin: 0 0 0.75rem;
  letter-spacing: 0.05em;
}

.page-hero p {
  margin: 0;
  max-width: 34rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.contact-block {
  display: grid;
  gap: 1.5rem;
  max-width: 40rem;
}

.contact-block p {
  margin: 0;
  color: var(--ink-soft);
}

.contact-rows {
  display: grid;
  gap: 1rem;
}

.contact-rows div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.contact-rows dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact-rows dd {
  margin: 0;
  color: var(--ink);
}

/* —— News —— */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.news-link {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.2fr);
  gap: clamp(1.25rem, 3vw, 2.25rem);
  align-items: center;
  color: inherit;
}

.news-link:hover {
  color: inherit;
}

.news-thumb {
  overflow: hidden;
  background: var(--mist);
  aspect-ratio: 3 / 2;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--ease);
}

.news-link:hover .news-thumb img {
  transform: scale(1.03);
}

.news-copy time {
  display: block;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.55rem;
}

.news-copy h2,
.news-copy h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.35;
  margin: 0 0 0.7rem;
}

.news-link:hover .news-copy h2,
.news-link:hover .news-copy h3 {
  color: var(--spark);
}

.news-copy p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.news-more {
  font-size: 0.9rem;
  color: var(--spark);
  letter-spacing: 0.04em;
}

.news-all {
  margin: 2.5rem 0 0;
}

.article-page {
  padding-top: 3.5rem;
}

.article-wrap {
  max-width: 46rem;
}

.article-back {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.article-header time {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.article-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

.article-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.article-body {
  margin-top: 2.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.article-body p {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.article-lead {
  font-size: 1.12rem;
  color: var(--ink);
  font-weight: 500;
}

.article-body ul {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.article-body li {
  margin-bottom: 0.35rem;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.2vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  margin: 2rem 0 0.85rem;
  color: var(--ink);
}

.article-figure {
  margin: 1.75rem 0;
}

.article-figure img {
  width: 100%;
  height: auto;
}

.article-source {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
}

.article-source a {
  color: var(--spark);
}

/* —— Footer —— */
.site-footer {
  flex-shrink: 0;
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: var(--white);
  padding: 2.25rem 0 1.75rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 0.35rem 0.75rem;
  margin: 0.2rem 0 0;
}

.footer-company {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-copy {
  margin: 0;
  font-size: 0.78rem;
  color: #9aa3b2;
}

.beian {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--muted);
}

.beian a {
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s;
}

.beian a:hover {
  color: var(--ink);
}

.beian-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* —— Reveal —— */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* —— Responsive —— */
@media (max-width: 900px) {
  .hero-visual {
    width: min(55vw, 320px);
    top: 12%;
    opacity: 0.55;
  }

  .hero-content {
    max-width: 100%;
    padding-top: 4rem;
  }

  .focus-list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .focus-list li {
    padding: 1.5rem 0;
    border-top-color: var(--line);
  }

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

  .news-link {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--space) 1rem;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    display: none;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-links a::after {
    display: none;
  }

  .hero-visual {
    display: none;
  }

  .contact-rows div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}