:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f6f5f4;
  --color-bg-muted: #f1f3f2;
  --color-text: rgba(0, 0, 0, 0.95);
  --color-text-secondary: #615d59;
  --color-text-muted: #8b8681;
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-strong: rgba(0, 0, 0, 0.16);

  --color-primary: #2e8b57;
  --color-primary-hover: #257046;
  --color-primary-soft: #e9f5ee;
  --color-primary-deep: #1f5f3b;
  --color-accent: #f4a259;
  --color-accent-soft: #fff3e8;

  --color-success: #2f9e44;
  --color-warning: #f08c00;
  --color-danger: #e03131;
  --color-info: #1971c2;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-en: "Playfair Display", "Times New Roman", Georgia, serif;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-48: 3rem;

  --line-tight: 1.25;
  --line-normal: 1.6;
  --line-relaxed: 1.8;

  --space-2: 0.125rem;
  --space-4: 0.25rem;
  --space-8: 0.5rem;
  --space-12: 0.75rem;
  --space-16: 1rem;
  --space-20: 1.25rem;
  --space-24: 1.5rem;
  --space-32: 2rem;
  --space-40: 2.5rem;
  --space-48: 3rem;
  --space-64: 4rem;
  --space-80: 5rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08), 0 10px 24px rgba(0, 0, 0, 0.04);

  --container: 1200px;
  --container-wide: 1360px;

  --duration-fast: 180ms;
  --duration-base: 280ms;
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);

  --header-height: 74px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
}

.container-wide {
  width: min(100% - 2rem, var(--container-wide));
  margin: 0 auto;
}

.section {
  padding: var(--space-64) 0;
}

.section--compact {
  padding: var(--space-48) 0;
}

.section--soft {
  background: var(--color-bg-soft);
}

.section-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(var(--fs-24), 2.5vw, var(--fs-36));
  line-height: var(--line-tight);
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: var(--space-12) 0 0;
  color: var(--color-text-secondary);
  font-size: var(--fs-16);
}

.grid {
  display: grid;
  gap: var(--space-24);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}

.card-body {
  padding: var(--space-24);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-12);
  color: var(--color-primary-deep);
  background: var(--color-primary-soft);
  border: 1px solid rgba(46, 139, 87, 0.2);
}

.kicker {
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-8);
}

.text-muted {
  color: var(--color-text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  min-height: 42px;
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 500;
  font-size: var(--fs-14);
  transition: all var(--duration-fast) var(--ease-standard);
  cursor: pointer;
}

.btn:focus-visible,
.nav-link:focus-visible,
.icon-btn:focus-visible,
.input:focus-visible,
.select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(46, 139, 87, 0.22);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn-secondary {
  background: #fff;
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-link {
  color: var(--color-primary);
  font-weight: 600;
  padding: 0;
  min-height: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--duration-base) var(--ease-standard);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-20);
  min-height: var(--header-height);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-8);
  white-space: nowrap;
}

.brand-mark {
  font-family: var(--font-en);
  font-size: 1.7rem;
  letter-spacing: -0.04em;
  font-weight: 700;
  color: var(--color-primary-deep);
}

.brand-sub {
  font-size: var(--fs-12);
  color: var(--color-text-secondary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.nav-link {
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-14);
  color: var(--color-text-secondary);
  transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.nav-link:hover,
.nav-link.active {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.icon-btn:hover {
  border-color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
}

.hero {
  position: relative;
  overflow: hidden;
}

.hero-track {
  display: flex;
  transition: transform 600ms var(--ease-standard);
}

.hero-slide {
  min-width: 100%;
  position: relative;
  color: #fff;
  background: linear-gradient(120deg, rgba(8, 33, 22, 0.76), rgba(26, 77, 51, 0.45));
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  min-height: min(78vh, 680px);
  display: flex;
  align-items: center;
  padding: calc(var(--space-80) + 1rem) 0 var(--space-80);
}

.hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.8rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
  max-width: 14ch;
}

.hero-desc {
  margin: var(--space-20) 0 var(--space-32);
  max-width: 52ch;
  font-size: var(--fs-18);
  color: rgba(255, 255, 255, 0.9);
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: var(--space-24);
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-8);
}

.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 0;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
}

.hero-dot.active {
  background: #fff;
}

.core-entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-20);
}

.core-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  background: #fff;
  transition: transform var(--duration-base) var(--ease-standard), box-shadow var(--duration-base) var(--ease-standard);
}

.core-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.core-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--color-primary-soft);
  color: var(--color-primary-deep);
  margin-bottom: var(--space-16);
}

.core-title {
  margin: 0;
  font-size: var(--fs-20);
  font-family: var(--font-serif);
}

.core-desc {
  margin: var(--space-12) 0 var(--space-16);
  color: var(--color-text-secondary);
  font-size: var(--fs-14);
}

.news-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-24);
}

.news-feature {
  overflow: hidden;
}

.news-feature img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
}

.news-feature .card-body {
  display: grid;
  gap: var(--space-12);
}

.news-list {
  display: grid;
  gap: var(--space-12);
}

.news-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-16);
  background: #fff;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.news-item:hover {
  border-color: var(--color-primary);
}

.news-date {
  margin-top: var(--space-8);
  font-size: var(--fs-12);
  color: var(--color-text-muted);
}

.cases-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(270px, 320px);
  overflow-x: auto;
  gap: var(--space-16);
  padding-bottom: var(--space-8);
  scroll-snap-type: x mandatory;
}

.cases-strip::-webkit-scrollbar {
  height: 8px;
}

.cases-strip::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 999px;
}

.case-card {
  scroll-snap-align: start;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
}

.case-card img {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.tag {
  display: inline-block;
  font-size: var(--fs-12);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-16);
}

.stat-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-20);
  text-align: center;
  background: #fff;
}

.stat-value {
  margin: 0;
  font-family: var(--font-en);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
  color: var(--color-primary-deep);
}

.stat-label {
  margin-top: var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--fs-14);
}

.logo-wall {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-12);
}

.logo-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 84px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-12);
  font-size: var(--fs-13);
  color: var(--color-text-secondary);
  background: #fff;
}

.page-hero {
  padding: var(--space-64) 0 var(--space-48);
  background: linear-gradient(180deg, var(--color-primary-soft), #fff 70%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  letter-spacing: -0.02em;
}

.page-hero p {
  margin: var(--space-12) 0 0;
  max-width: 65ch;
  color: var(--color-text-secondary);
}

.page-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--space-24);
}

.side-nav {
  position: sticky;
  top: calc(var(--header-height) + var(--space-20));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-12);
  background: #fff;
  height: fit-content;
}

.side-nav a {
  display: block;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--fs-14);
}

.side-nav a:hover,
.side-nav a.active {
  background: var(--color-bg-soft);
  color: var(--color-primary-deep);
}

.content-stack {
  display: grid;
  gap: var(--space-24);
}

.content-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #fff;
  padding: var(--space-24);
}

.content-block h2,
.content-block h3 {
  margin: 0 0 var(--space-12);
  font-family: var(--font-serif);
  line-height: var(--line-tight);
}

.content-block p {
  margin: 0;
  color: var(--color-text-secondary);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  padding: var(--space-12) var(--space-16);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: var(--fs-14);
}

th {
  background: var(--color-bg-soft);
  font-weight: 600;
}

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

.download-list {
  display: grid;
  gap: var(--space-12);
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-16);
  background: #fff;
}

.download-meta {
  display: grid;
  gap: var(--space-4);
}

.download-meta small {
  color: var(--color-text-muted);
}

.login-shell {
  min-height: calc(100vh - var(--header-height));
  display: grid;
  place-items: center;
  padding: var(--space-32) 1rem var(--space-64);
  background: radial-gradient(circle at 15% 20%, var(--color-primary-soft), transparent 40%), radial-gradient(circle at 80% 15%, var(--color-accent-soft), transparent 35%), #fff;
}

.login-card {
  width: min(100%, 420px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-md);
}

.form-group {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.form-label {
  font-size: var(--fs-14);
  color: var(--color-text-secondary);
}

.input,
.select,
textarea {
  width: 100%;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0.65rem 0.75rem;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.input:focus,
.select:focus,
textarea:focus {
  border-color: var(--color-primary);
  outline: none;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: #fff;
  padding: var(--space-40) 0 var(--space-24);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-20);
}

.footer-title {
  margin: 0 0 var(--space-8);
  font-size: var(--fs-16);
  font-family: var(--font-serif);
}

.footer-links {
  display: grid;
  gap: var(--space-8);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--fs-14);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--space-24);
  padding-top: var(--space-16);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  gap: var(--space-12);
  flex-wrap: wrap;
  font-size: var(--fs-12);
  color: var(--color-text-muted);
}

.fade-in {
  animation: fadeInUp 650ms var(--ease-standard) both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .nav {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .logo-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .section {
    padding: var(--space-48) 0;
  }

  .news-layout,
  .page-layout,
  .grid-4,
  .stats {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .core-entry-grid {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 64px;
  }

  .container,
  .container-wide {
    width: min(100% - 1.25rem, var(--container));
  }

  .brand-sub {
    display: none;
  }

  .hero-content {
    min-height: 72vh;
    padding: var(--space-64) 0 var(--space-64);
  }

  .hero-title {
    font-size: clamp(1.8rem, 9vw, 2.4rem);
  }

  .hero-desc {
    font-size: var(--fs-16);
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .logo-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .login-card {
    padding: var(--space-24);
  }
}