@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

/* =====================
   CSS 变量 & 重置
   ===================== */
:root {
  --mint: #99ffcc;
  --green: #00ff41;
  --deep: #001e3c;
  --deep2: #002a52;
  --deep3: #003366;
  --text-main: #d0ffe8;
  --text-muted: #7ab8a0;
  --text-inv: #001e3c;
  --card-bg: rgba(0, 42, 82, 0.82);
  --card-border: rgba(153, 255, 204, 0.18);
  --card-line: #00ff41;
  --radius: 10px;
  --font: 'Plus Jakarta Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --nav-h: 56px;
  --announce-h: 36px;
  --brand-h: 64px;
  --scroll-offset: calc(var(--announce-h) + var(--brand-h) + var(--nav-h) + 8px);
  --transition: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
  line-height: 1.65;
  background: var(--deep);
  color: var(--text-main);
}

body {
  font-family: var(--font);
  background: var(--deep);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

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

a {
  color: var(--mint);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus-visible {
  color: var(--green);
  outline: 2px solid var(--green);
  outline-offset: 2px;
  border-radius: 3px;
}

ul, menu {
  list-style: none;
}

/* =====================
   生物形态背景画布
   ===================== */
.bio-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.18;
}

/* =====================
   站点外壳
   ===================== */
.site-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* =====================
   顶部公告条
   ===================== */
.top-announce {
  background: linear-gradient(90deg, var(--deep2) 0%, #004a26 50%, var(--deep2) 100%);
  border-bottom: 1px solid rgba(0, 255, 65, 0.3);
  height: var(--announce-h);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: sticky;
  top: 0;
  z-index: 100;
}

.announce-text {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--mint);
  white-space: nowrap;
  animation: marquee-slide 18s linear infinite;
}

@keyframes marquee-slide {
  0% { transform: translateX(15%); }
  100% { transform: translateX(-15%); }
}

/* =====================
   Header 两行导航
   ===================== */
.site-header {
  position: sticky;
  top: var(--announce-h);
  z-index: 99;
  background: rgba(0, 30, 60, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}

/* 品牌行 */
.brand-row {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 0 2rem;
  height: var(--brand-h);
  border-bottom: 1px solid rgba(153, 255, 204, 0.08);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--mint);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.brand-link:hover {
  color: var(--green);
  outline: none;
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-slogan {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: auto;
  font-style: italic;
  letter-spacing: 0.04em;
}

/* 菜单行：details > summary + menu > li > a */
.main-nav {
  padding: 0 2rem;
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav-details {
  width: 100%;
}

.nav-details[open] > .nav-summary .nav-toggle-icon span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
.nav-details[open] > .nav-summary .nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}
.nav-details[open] > .nav-summary .nav-toggle-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

.nav-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
  user-select: none;
  width: 100%;
}

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

.nav-toggle-label {
  display: none;
  font-size: 0.85rem;
  color: var(--mint);
  font-weight: 600;
}

.nav-toggle-icon {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 24px;
  cursor: pointer;
}

.nav-toggle-icon span {
  display: block;
  height: 2px;
  background: var(--mint);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  white-space: nowrap;
  min-height: 40px;
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--green);
  background: rgba(0, 255, 65, 0.08);
  border-color: rgba(0, 255, 65, 0.25);
  outline: none;
}

/* =====================
   Hero 区
   ===================== */
.hero-wrap {
  position: relative;
  height: 45vh;
  min-height: 280px;
  max-height: 480px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--deep) 0%, #00321a 60%, #001e3c 100%);
}

.hero-inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 2rem 3rem 3.5rem 2rem;
}

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

.hero-media .hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.45) saturate(1.2);
}

.hero-media--placeholder {
  background: radial-gradient(ellipse at 30% 60%, rgba(0,255,65,0.12) 0%, transparent 70%),
              radial-gradient(ellipse at 70% 30%, rgba(153,255,204,0.08) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: right;
  max-width: 560px;
}

.hero-h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--mint);
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
  text-shadow: 0 0 24px rgba(153,255,204,0.4);
}

.hero-sub {
  font-size: clamp(0.88rem, 1.6vw, 1rem);
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  background: var(--green);
  color: var(--deep);
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  min-height: 44px;
  box-shadow: 0 0 16px rgba(0,255,65,0.35);
}

.hero-cta:hover, .hero-cta:focus-visible {
  background: var(--mint);
  color: var(--deep);
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(0,255,65,0.5);
  outline: none;
}

/* 圆弧底边 */
.hero-arc {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--deep);
  border-radius: 50% 50% 0 0 / 80px 80px 0 0;
  z-index: 3;
}

/* =====================
   主内容区
   ===================== */
.site-main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 3rem 2rem 4rem;
}

/* article 是 main 直接子元素，内含 figure/aside */
.content-section {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: auto auto;
  gap: 2rem;
  align-items: start;
}

/* aside 在内容左侧 */
.content-aside {
  grid-column: 1;
  grid-row: 1 / 3;
  position: sticky;
  top: calc(var(--announce-h) + var(--brand-h) + var(--nav-h) + 1.5rem);
}

.aside-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  border-bottom: 3px solid var(--card-line);
  backdrop-filter: blur(8px);
  animation: breathe 5s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 0 12px rgba(0,255,65,0.1), 0 2px 16px rgba(0,0,0,0.3); }
  50% { box-shadow: 0 0 28px rgba(0,255,65,0.22), 0 4px 24px rgba(0,0,0,0.4); }
}

.aside-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

.aside-card .subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.aside-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.aside-features li {
  font-size: 0.82rem;
  color: var(--text-main);
  padding-left: 1rem;
  position: relative;
}

.aside-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: breathe-dot 3s ease-in-out infinite;
}

@keyframes breathe-dot {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}

/* figure 生物形态装饰 */
.content-figure {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  height: 80px;
  pointer-events: none;
  overflow: visible;
}

.bio-cell {
  position: absolute;
  border-radius: 50% 40% 60% 45% / 55% 60% 40% 50%;
  opacity: 0.18;
  filter: blur(1px);
  animation: cell-morph 8s ease-in-out infinite alternate;
}

.bio-cell--1 {
  width: 70px; height: 60px;
  background: var(--green);
  top: 5px; left: 20px;
  animation-delay: 0s;
}

.bio-cell--2 {
  width: 50px; height: 55px;
  background: var(--mint);
  top: 15px; left: 70px;
  animation-delay: 1.5s;
}

.bio-cell--3 {
  width: 60px; height: 45px;
  background: var(--green);
  top: 8px; left: 110px;
  animation-delay: 3s;
}

@keyframes cell-morph {
  0% { border-radius: 50% 40% 60% 45% / 55% 60% 40% 50%; transform: scale(1) rotate(0deg); }
  33% { border-radius: 60% 50% 40% 55% / 45% 40% 60% 55%; transform: scale(1.08) rotate(8deg); }
  66% { border-radius: 40% 60% 55% 45% / 60% 45% 55% 40%; transform: scale(0.95) rotate(-5deg); }
  100% { border-radius: 55% 45% 50% 60% / 40% 55% 45% 60%; transform: scale(1.05) rotate(12deg); }
}

/* 正文内容 */
.page-content-body {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
}

/* =====================
   page.content 内部排版（article 等）
   ===================== */
.page-content-body article {
  margin-bottom: 3.5rem;
  scroll-margin-top: var(--scroll-offset);
}

.page-content-body h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
  position: relative;
  padding-left: 1rem;
}

.page-content-body h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 3px;
  background: var(--green);
  border-radius: 2px;
}

.page-content-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 1.5rem 0 0.5rem;
}

.page-content-body p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.page-content-body ul,
.page-content-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content-body li {
  line-height: 1.7;
  margin-bottom: 0.35rem;
  color: var(--text-main);
}

.page-content-body a {
  color: var(--mint);
  border-bottom: 1px solid rgba(153,255,204,0.3);
  transition: color var(--transition), border-color var(--transition);
}

.page-content-body a:hover {
  color: var(--green);
  border-bottom-color: var(--green);
}

.page-content-body blockquote {
  border-left: 3px solid var(--green);
  padding: 0.75rem 1rem;
  background: rgba(0,255,65,0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.25rem 0;
  font-style: italic;
  color: var(--text-muted);
}

.page-content-body strong {
  color: var(--mint);
  font-weight: 700;
}

/* article 内卡片风格 */
.page-content-body article {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-bottom: 3px solid var(--card-line);
  border-radius: var(--radius);
  padding: 2rem 2rem 1.75rem;
  backdrop-filter: blur(6px);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.page-content-body article:hover {
  box-shadow: 0 0 24px rgba(0,255,65,0.14);
  border-color: rgba(153,255,204,0.28);
}

/* =====================
   h2 + p.subtitle 装饰
   ===================== */
.subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
  font-style: italic;
}

/* =====================
   页脚
   ===================== */
.site-footer {
  background: rgba(0, 20, 45, 0.95);
  border-top: 1px solid var(--card-border);
  margin-top: auto;
}

/* footer > article×n */
.footer-cta-section {
  padding: 3.5rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, rgba(0,42,82,0.9) 0%, rgba(0,50,26,0.7) 100%);
  border-bottom: 1px solid var(--card-border);
}

.footer-cta-inner {
  max-width: 700px;
  margin: 0 auto;
}

.footer-cta-title {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 0.5rem;
}

.footer-cta-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.footer-cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 2rem;
  background: transparent;
  color: var(--green);
  border: 2px solid var(--green);
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  min-height: 44px;
}

.footer-cta-btn:hover, .footer-cta-btn:focus-visible {
  background: var(--green);
  color: var(--deep);
  box-shadow: 0 0 20px rgba(0,255,65,0.4);
  outline: none;
}

.footer-bottom-section {
  padding: 1.2rem 2rem;
}

.footer-bottom-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.2rem;
}

.footer-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.footer-link:hover {
  color: var(--mint);
}

/* =====================
   全局 article scroll-margin-top
   ===================== */
article[id] {
  scroll-margin-top: var(--scroll-offset);
}

/* =====================
   响应式
   ===================== */
@media (max-width: 900px) {
  .content-section {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .content-aside {
    grid-column: 1;
    grid-row: auto;
    position: static;
  }

  .content-figure {
    grid-column: 1;
    grid-row: auto;
  }

  .page-content-body {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (max-width: 768px) {
  .brand-row {
    padding: 0 1rem;
  }

  .brand-slogan {
    display: none;
  }

  .main-nav {
    padding: 0 1rem;
  }

  .nav-toggle-label {
    display: inline;
  }

  .nav-toggle-icon {
    display: flex;
  }

  .nav-summary {
    padding: 0.5rem 0;
    min-height: 44px;
  }

  .nav-details:not([open]) .nav-menu {
    display: none;
  }

  .nav-details[open] .nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.5rem 0 0.75rem;
    border-top: 1px solid var(--card-border);
    margin-top: 0.25rem;
  }

  .nav-link {
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
  }

  .hero-inner {
    padding: 1.5rem 1.25rem 3rem;
    justify-content: flex-end;
  }

  .hero-content {
    max-width: 100%;
  }

  .site-main {
    padding: 2rem 1rem 3rem;
  }

  .footer-cta-section {
    padding: 2.5rem 1rem;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  :root {
    --brand-h: 56px;
    --nav-h: 52px;
  }

  .hero-wrap {
    height: auto;
    min-height: 52vh;
    max-height: none;
  }

  .hero-h1 {
    font-size: 1.4rem;
  }

  .page-content-body article {
    padding: 1.25rem 1rem 1rem;
  }
}

/* =====================
   Hover 微交互
   ===================== */
.nav-link {
  position: relative;
  overflow: hidden;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0.85rem;
  right: 0.85rem;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

/* =====================
   prefers-reduced-motion
   ===================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button[aria-expanded]{min-width:44px;min-height:44px}