:root {
  --color-primary: #1F3A5F;
  --color-primary-light: #2E5C8A;
  --color-primary-dark: #152A45;
  --color-accent: #4A90D9;
  --color-accent-soft: #E8EEF6;
  --color-success: #2F6B4F;
  --color-purple: #5B3A78;
  --color-bg: #F5F7FA;
  --color-bg-alt: #FFFFFF;
  --color-surface: rgba(255, 255, 255, 0.72);
  --color-surface-solid: #FFFFFF;
  --color-text: #1A2332;
  --color-text-secondary: #4A5568;
  --color-text-muted: #718096;
  --color-border: rgba(31, 58, 95, 0.12);
  --color-border-solid: #E2E8F0;
  --color-shadow: rgba(31, 58, 95, 0.08);
  --color-shadow-lg: rgba(31, 58, 95, 0.14);
  --gradient-banner: linear-gradient(135deg, #1F3A5F 0%, #2E5C8A 45%, #4A90D9 100%);
  --gradient-banner-2: linear-gradient(135deg, #1B4332 0%, #2F6B4F 50%, #52B788 100%);
  --gradient-banner-3: linear-gradient(135deg, #3C1A5B 0%, #5B3A78 50%, #9B6BB5 100%);
  --gradient-accent: linear-gradient(135deg, #4A90D9 0%, #7BB3E8 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 68px;
  --max-width: 1200px;
  --glass-blur: blur(16px) saturate(1.6);
}

[data-theme="dark"] {
  --color-primary: #7BB3E8;
  --color-primary-light: #A8CCF0;
  --color-primary-dark: #4A90D9;
  --color-accent: #7BB3E8;
  --color-accent-soft: #1A2A3F;
  --color-bg: #0D1520;
  --color-bg-alt: #141E2E;
  --color-surface: rgba(20, 30, 46, 0.72);
  --color-surface-solid: #1A2436;
  --color-text: #E8EEF6;
  --color-text-secondary: #A8B8CC;
  --color-text-muted: #6B7D94;
  --color-border: rgba(123, 179, 232, 0.15);
  --color-border-solid: #243040;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-shadow-lg: rgba(0, 0, 0, 0.5);
  --gradient-banner: linear-gradient(135deg, #0A1628 0%, #1A3A5C 45%, #2E5C8A 100%);
  --gradient-banner-2: linear-gradient(135deg, #0A1F17 0%, #1B4332 50%, #2F6B4F 100%);
  --gradient-banner-3: linear-gradient(135deg, #1E0A2E 0%, #3C1A5B 50%, #5B3A78 100%);
  --gradient-accent: linear-gradient(135deg, #4A90D9 0%, #7BB3E8 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
h2 { font-size: clamp(1.35rem, 2.8vw, 1.75rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.3rem); }

p {
  margin-bottom: 1em;
  color: var(--color-text-secondary);
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-solid);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ============ HEADER ============ */
#siteHeader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#siteHeader.is-scrolled {
  box-shadow: 0 4px 24px var(--color-shadow);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo svg {
  border-radius: 10px;
  transition: transform var(--transition-base);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

.logo-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

#mainNav {
  flex: 1;
  display: flex;
  justify-content: center;
}

#mainNav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

#mainNav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

#mainNav a:hover {
  color: var(--color-primary);
  background: var(--color-accent-soft);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#siteSearch {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-solid);
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#siteSearch:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

#searchInput {
  border: none;
  background: transparent;
  padding: 8px 14px;
  font-size: 0.85rem;
  color: var(--color-text);
  width: 160px;
  font-family: inherit;
  outline: none;
}

#searchInput::placeholder {
  color: var(--color-text-muted);
}

#siteSearch button {
  border: none;
  background: var(--gradient-accent);
  color: #fff;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
}

#siteSearch button:hover {
  opacity: 0.88;
}

#themeToggle,
#menuToggle {
  border: 1px solid var(--color-border-solid);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

#themeToggle:hover,
#menuToggle:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
  transform: translateY(-1px);
}

#menuToggle {
  display: none;
}

/* ============ BANNER ============ */
.banner {
  position: relative;
  margin-top: var(--header-height);
  overflow: hidden;
  background: var(--gradient-banner);
}

.banner-slides {
  position: relative;
  min-height: 420px;
}

.banner-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding: 60px 48px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.banner-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.banner-slide:nth-child(1) { background: var(--gradient-banner); }
.banner-slide:nth-child(2) { background: var(--gradient-banner-2); }
.banner-slide:nth-child(3) { background: var(--gradient-banner-3); }

.banner-art {
  width: 100%;
  max-width: 520px;
  flex: 1 1 480px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateX(-40px) scale(0.96);
  transition: opacity 0.8s ease 0.15s, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s;
}

.banner-slide.is-active .banner-art {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.banner-copy {
  flex: 1 1 400px;
  max-width: 520px;
  color: #fff;
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease 0.3s, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
}

.banner-slide.is-active .banner-copy {
  opacity: 1;
  transform: translateX(0);
}

.banner-copy h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.banner-copy p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0;
}

.banner-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-base);
}

.banner-dots button.is-active {
  width: 32px;
  background: #fff;
  border-color: #fff;
}

.banner-dots button:hover {
  border-color: #fff;
  transform: scale(1.15);
}

/* ============ BREADCRUMB ============ */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px 0;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-border-solid);
}

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

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============ STATS ============ */
.stats {
  max-width: var(--max-width);
  margin: 32px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px var(--color-shadow-lg);
  border-color: var(--color-accent);
}

.stat-item strong {
  display: block;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ============ MAIN CONTENT ============ */
.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.main-content > section {
  margin-top: 56px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.main-content > section > h1,
.main-content > section > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.main-content > section > h1::after,
.main-content > section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.main-content h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.main-content h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-accent);
  flex-shrink: 0;
}

.main-content p {
  margin-bottom: 1.1em;
}

/* ============ NEWS LIST ============ */
.news-list {
  display: grid;
  gap: 16px;
}

.news-list li {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.news-list li:hover {
  transform: translateX(6px);
  box-shadow: 0 10px 30px var(--color-shadow);
  border-color: var(--color-accent);
}

.news-list time {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}

.news-list h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--color-text);
  display: block;
}

.news-list h3::before {
  display: none;
}

.news-list p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ============ ARTICLE CARDS ============ */
.article-card {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  margin-top: 18px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 44px var(--color-shadow-lg);
  border-color: var(--color-accent);
}

.article-card:hover::before {
  transform: scaleY(1);
}

.article-card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: var(--color-text);
  display: block;
}

.article-card h3::before {
  display: none;
}

.article-card time {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.article-card p {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  margin-bottom: 14px;
}

.article-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.article-card a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.article-card a:hover {
  gap: 10px;
  color: var(--color-accent);
}

.article-card a:hover::after {
  transform: translateX(3px);
}

/* ============ HOWTO ============ */
#howto ol {
  counter-reset: howto-step;
  display: grid;
  gap: 12px;
  margin: 16px 0;
  padding: 0;
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding: 18px 20px 18px 64px;
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(74, 144, 217, 0.3);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: 0 8px 24px var(--color-shadow);
  border-color: var(--color-accent);
}

/* ============ FAQ ============ */
#faq details {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

#faq details:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 28px var(--color-shadow);
}

#faq details[open] {
  border-color: var(--color-accent);
  box-shadow: 0 12px 36px var(--color-shadow);
}

#faq summary {
  cursor: pointer;
  padding: 20px 56px 20px 24px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-text);
  position: relative;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-accent);
  color: #fff;
}

#faq summary:hover {
  color: var(--color-primary);
}

#faq details p {
  padding: 0 24px 22px;
  margin: 0;
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  animation: fadeInDown 0.35s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ LISTS IN CONTENT ============ */
#notes ul {
  display: grid;
  gap: 12px;
}

#notes ul li {
  position: relative;
  padding: 16px 20px 16px 52px;
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#notes ul li::before {
  content: "✓";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

#notes ul li:hover {
  transform: translateX(6px);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px var(--color-shadow);
}

/* ============ TESTIMONIALS ============ */
#testimonials blockquote {
  position: relative;
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 30px 24px 44px;
  margin-bottom: 18px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 10px;
  font-size: 3.2rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.35;
  font-family: Georgia, serif;
}

#testimonials blockquote:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 44px var(--color-shadow-lg);
  border-color: var(--color-accent);
}

#testimonials blockquote p {
  font-size: 0.98rem;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 12px;
}

#testimonials blockquote footer {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ============ CONTACT ============ */
#contact {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding: 0 24px;
}

#contact > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 28px;
}

#contact > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.contact-item {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.contact-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 48px var(--color-shadow-lg);
  border-color: var(--color-accent);
}

.contact-item h3 {
  margin: 0 0 16px;
  font-size: 1.05rem;
  color: var(--color-primary);
  display: block;
}

.contact-item h3::before {
  display: none;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  line-height: 1.7;
}

.contact-item p:last-child {
  margin-bottom: 0;
}

/* ============ TEAM ============ */
#team {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding: 0 24px;
}

#team > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 28px;
}

#team > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.team-item {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.team-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 48px var(--color-shadow-lg);
  border-color: var(--color-accent);
}

.team-item h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  color: var(--color-primary);
  display: block;
}

.team-item h3::before {
  display: none;
}

.team-item p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.meta-info {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 16px 20px;
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px dashed var(--color-border-solid);
  border-radius: var(--radius-md);
  margin: 0;
}

/* ============ SITEMAP ============ */
#sitemap {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding: 0 24px;
}

#sitemap > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 28px;
}

#sitemap > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.sitemap-grid > div {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.sitemap-grid > div:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 40px var(--color-shadow);
  border-color: var(--color-accent);
}

.sitemap-grid h3 {
  margin: 0 0 16px;
  font-size: 1rem;
  color: var(--color-primary);
  display: block;
}

.sitemap-grid h3::before {
  display: none;
}

.sitemap-grid ul {
  display: grid;
  gap: 8px;
}

.sitemap-grid li a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  padding: 4px 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.sitemap-grid li a::before {
  content: "›";
  color: var(--color-accent);
  font-weight: 700;
  transition: transform var(--transition-fast);
}

.sitemap-grid li a:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ============ FRIEND LINKS ============ */
#links {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding: 0 24px;
}

#links > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 24px;
}

#links > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.friend-links li a {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.friend-links li a:hover {
  color: #fff;
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(74, 144, 217, 0.35);
}

/* ============ FOOTER ============ */
#siteFooter {
  margin-top: 80px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 40px;
}

.footer-col h3 {
  font-size: 1rem;
  margin-bottom: 18px;
  color: var(--color-text);
  position: relative;
  padding-bottom: 12px;
}

.footer-col h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

.footer-col p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col li a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.footer-col li a:hover {
  color: var(--color-primary);
  padding-left: 6px;
}

#siteFooter section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 22px 24px;
  border-top: 1px solid var(--color-border);
}

#siteFooter section h3 {
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

#siteFooter section p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

.footer-copy {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ============ BACK TO TOP ============ */
#backToTop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(74, 144, 217, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

#backToTop::before {
  content: "↑";
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

#backToTop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#backToTop:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 32px rgba(74, 144, 217, 0.55);
}

/* ============ SCROLL REVEAL ANIMATIONS ============ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1080px) {
  #mainNav ul {
    gap: 2px;
  }
  #mainNav a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }
  #searchInput {
    width: 120px;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 900px) {
  #mainNav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    box-shadow: 0 12px 32px var(--color-shadow);
  }
  #mainNav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  #mainNav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  #mainNav a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
  }
  #menuToggle {
    display: block;
  }
  #searchInput {
    width: 100px;
  }
  .banner-slides {
    min-height: 520px;
  }
  .banner-slide {
    flex-direction: column;
    gap: 28px;
    padding: 48px 28px 72px;
    text-align: center;
  }
  .banner-art {
    max-width: 420px;
    flex: 0 1 auto;
  }
  .banner-copy {
    flex: 0 1 auto;
    max-width: 100%;
  }
  .banner-copy h2 {
    font-size: 1.5rem;
  }
  .banner-copy p {
    font-size: 0.95rem;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .main-content > section {
    margin-top: 44px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 60px;
  }
  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }
  .logo-text {
    font-size: 1rem;
  }
  .logo svg {
    width: 34px;
    height: 34px;
  }
  #siteSearch {
    display: none;
  }
  #themeToggle,
  #menuToggle {
    padding: 7px 12px;
    font-size: 0.78rem;
  }
  .banner-slides {
    min-height: 480px;
  }
  .banner-slide {
    padding: 36px 20px 68px;
  }
  .banner-art {
    max-width: 300px;
  }
  .banner-copy h2 {
    font-size: 1.25rem;
  }
  .banner-copy p {
    font-size: 0.88rem;
  }
  .banner-dots {
    bottom: 20px;
  }
  .breadcrumb {
    padding: 16px 16px 0;
  }
  .stats {
    padding: 0 16px;
    gap: 12px;
  }
  .stat-item {
    padding: 20px 14px;
  }
  .stat-item strong {
    font-size: 1.5rem;
  }
  .stat-item span {
    font-size: 0.78rem;
  }
  .main-content {
    padding: 0 16px;
  }
  .main-content > section {
    margin-top: 36px;
  }
  .main-content > section > h1,
  .main-content > section > h2 {
    margin-bottom: 18px;
  }
  .main-content h3 {
    margin-top: 24px;
  }
  .news-list li {
    padding: 18px 18px;
  }
  .article-card {
    padding: 20px 20px;
  }
  #howto ol li {
    padding: 16px 16px 16px 56px;
  }
  #howto ol li::before {
    left: 14px;
    width: 28px;
    height: 28px;
    font-size: 0.78rem;
  }
  #faq summary {
    padding: 16px 50px 16px 18px;
    font-size: 0.92rem;
  }
  #faq summary::after {
    right: 16px;
    width: 22px;
    height: 22px;
    font-size: 0.95rem;
  }
  #faq details p {
    padding: 0 18px 18px;
    font-size: 0.88rem;
  }
  #testimonials blockquote {
    padding: 22px 20px 20px 38px;
  }
  #testimonials blockquote::before {
    font-size: 2.4rem;
    left: 14px;
  }
  #contact,
  #team,
  #sitemap,
  #links {
    padding: 0 16px;
    margin-top: 44px;
  }
  .contact-item,
  .team-item,
  .sitemap-grid > div {
    padding: 22px 20px;
  }
  .friend-links {
    gap: 10px;
  }
  .friend-links li a {
    padding: 8px 16px;
    font-size: 0.82rem;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 32px;
  }
  #siteFooter section {
    padding: 18px 16px;
  }
  .footer-copy {
    padding: 20px 16px;
    font-size: 0.78rem;
  }
  #backToTop {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
  #backToTop::before {
    font-size: 1.1rem;
  }
}

@media (max-width: 380px) {
  .logo-text {
    display: none;
  }
  #themeToggle,
  #menuToggle {
    padding: 6px 10px;
    font-size: 0.72rem;
  }
  .banner-copy h2 {
    font-size: 1.1rem;
  }
}

/* ============ PRINT ============ */
@media print {
  #siteHeader,
  #backToTop,
  .banner,
  .header-actions,
  #siteSearch {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .main-content > section {
    page-break-inside: avoid;
  }
}