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

:root {
  --bg-0: #1a1d24;
  --bg-card: rgba(44, 48, 58, 0.75);
  --cyan: #00f0ff;
  --magenta: #ff00e5;
  --purple: #7c3aed;
  --green: #00ff9d;
  --amber: #ffb800;
  --text: #ffffff;
  --text-2: #e8ecf3;
  --text-3: #c8cfd9;
  --line: rgba(0, 240, 255, 0.15);
  --line-bright: rgba(0, 240, 255, 0.4);
  --font-mono: 'Fira Code', 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

#particles { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.7; }

body::before {
  content: ''; position: fixed; inset: -50%;
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.035) 1px, transparent 1px);
  background-size: 80px 80px; pointer-events: none; z-index: 1;
  animation: gridMove 20s linear infinite;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
@keyframes gridMove { 0% { transform: translate(0,0); } 100% { transform: translate(80px,80px); } }

body::after {
  content: ''; position: fixed; inset: 0;
  background: linear-gradient(transparent 50%, rgba(0, 240, 255, 0.012) 50%);
  background-size: 100% 4px; pointer-events: none; z-index: 2; opacity: 0.4;
}

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: rgba(26, 29, 36, 0.8);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--line);
  padding: 0 5%; height: 72px;
  display: flex; align-items: center; justify-content: space-between;
  transition: all 0.4s;
}
nav::before {
  content: ''; position: absolute; bottom: -1px; left: 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0; transition: opacity 0.4s;
}
nav.scrolled { background: rgba(26, 29, 36, 0.95); border-bottom-color: var(--line-bright); }
nav.scrolled::before { opacity: 0.8; }

.nav-logo {
  display: flex; align-items: center; gap: 12px;
  font-size: 1.25rem; font-weight: 800; letter-spacing: 2px;
  color: var(--text); text-decoration: none; font-family: var(--font-mono);
}
.logo-icon {
  width: 38px; height: 38px; border-radius: 8px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(124, 58, 237, 0.15));
  border: 1.5px solid var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 900; color: var(--cyan);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4), inset 0 0 12px rgba(0, 240, 255, 0.15);
  animation: logoPulse 3s ease-in-out infinite;
}
@keyframes logoPulse {
  0%,100% { box-shadow: 0 0 16px rgba(0, 240, 255, 0.4), inset 0 0 12px rgba(0, 240, 255, 0.15); }
  50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.7), inset 0 0 18px rgba(0, 240, 255, 0.3); }
}
.nav-logo .ver {
  font-size: 0.62rem; color: var(--cyan); padding: 1px 6px;
  border: 1px solid rgba(0, 240, 255, 0.3); border-radius: 4px;
  letter-spacing: 1px; opacity: 0.9;
}
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a {
  color: var(--text-2); text-decoration: none;
  padding: 8px 16px; border-radius: 6px;
  font-size: 0.85rem; font-family: var(--font-mono);
  letter-spacing: 0.5px; transition: all 0.25s;
  position: relative; display: flex; align-items: center; gap: 6px; white-space: nowrap;
}
.nav-links a::before {
  content: '▸'; font-size: 0.7rem; color: var(--cyan);
  opacity: 0; transform: translateX(-4px); transition: all 0.25s;
}
.nav-links a:hover {
  color: var(--cyan); background: rgba(0, 240, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.2);
}
.nav-links a:hover::before { opacity: 1; transform: translateX(0); }
.nav-links a.nav-update { color: var(--green); }
.nav-links a.nav-update:hover {
  color: var(--green); background: rgba(0, 255, 157, 0.06);
  box-shadow: inset 0 0 0 1px rgba(0, 255, 157, 0.3);
}
.nav-links a.nav-update::before { color: var(--green); }

.nav-right { display: flex; align-items: center; gap: 10px; }

.lang-switch {
  background: rgba(0, 240, 255, 0.03);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--text-3); font-family: var(--font-mono);
  font-size: 0.76rem; padding: 0 12px; height: 36px;
  border-radius: 6px; cursor: pointer; transition: all 0.3s;
  letter-spacing: 1px; display: inline-flex; align-items: center; gap: 6px;
  position: relative; overflow: hidden; text-decoration: none;
}
.lang-switch::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.1), transparent);
  transform: translateX(-100%); transition: transform 0.5s;
}
.lang-switch:hover::before { transform: translateX(100%); }
.lang-switch:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.35), inset 0 0 8px rgba(0, 240, 255, 0.1);
}
.lang-opt { color: var(--text-3); transition: all 0.3s; padding: 0 3px; position: relative; z-index: 1; font-weight: 600; }
.lang-opt.active { color: var(--cyan); text-shadow: 0 0 8px var(--cyan), 0 0 16px rgba(0, 240, 255, 0.5); }
.lang-sep { color: var(--text-3); opacity: 0.5; position: relative; z-index: 1; }

.nav-toggle {
  display: none; background: none;
  border: 1px solid var(--line-bright); color: var(--cyan);
  font-size: 1.3rem; padding: 6px 12px; border-radius: 6px; cursor: pointer;
}

section {
  position: relative; z-index: 5;
  padding: 70px 5% 50px;
  max-width: 1320px; margin: 0 auto;
}

.section-title {
  font-size: 2.4rem; font-weight: 800;
  margin-bottom: 14px; line-height: 1.25;
  letter-spacing: -0.5px;
}
.section-title .grad {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 50%, var(--magenta) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  color: var(--text-2); max-width: 1200px;
  margin-bottom: 36px; font-size: 1rem; text-wrap: pretty;
}
.fade-up {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding-top: 72px; position: relative; overflow: hidden;
}
.hero-inner {
  position: relative; z-index: 5;
  max-width: 1320px; margin: 0 auto; padding: 0 5%;
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 70px; align-items: center; width: 100%;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 2px; color: var(--green);
  padding: 6px 14px; border: 1px solid rgba(0, 255, 157, 0.3);
  border-radius: 4px; background: rgba(0, 255, 157, 0.04);
  margin-bottom: 24px; white-space: nowrap;
}
.hero-tag .live-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 10px var(--green);
  animation: dotPulse 1.4s ease-in-out infinite;
}
@keyframes dotPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

.hero h1 {
  font-size: 3.6rem; font-weight: 800;
  line-height: 1.12; margin-bottom: 24px;
  letter-spacing: -1.5px; color: var(--text);
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--cyan) 0%, #4f8fff 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text-2); font-size: 1.08rem;
  margin-bottom: 40px; max-width: 580px;
}
.hero p .slogan {
  display: block;
  margin-top: 14px;
  color: var(--cyan);
  font-weight: 600;
  font-size: 1.02rem;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
  letter-spacing: 0.5px;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 30px; border-radius: 6px;
  font-size: 0.88rem; font-weight: 600;
  font-family: var(--font-mono); letter-spacing: 1px;
  text-decoration: none; transition: all 0.3s;
  cursor: pointer; border: none;
  position: relative; overflow: hidden; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #0055ff);
  color: #1a1d24;
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.4), inset 0 0 12px rgba(255, 255, 255, 0.2);
}
.btn-primary::before {
  content: ''; position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transition: left 0.6s;
}
.btn-primary:hover::before { left: 100%; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.7), 0 0 60px rgba(0, 240, 255, 0.3);
}
.btn-outline {
  background: rgba(0, 240, 255, 0.03); color: var(--cyan);
  border: 1.5px solid rgba(0, 240, 255, 0.4);
}
.btn-outline:hover {
  background: rgba(0, 240, 255, 0.1); border-color: var(--cyan);
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.3), inset 0 0 12px rgba(0, 240, 255, 0.1);
  transform: translateY(-2px);
}

.hero-visual { display: flex; justify-content: center; align-items: center; perspective: 1200px; }
.terminal {
  width: 100%; max-width: 560px;
  background: rgba(28, 32, 40, 0.92);
  border: 1px solid var(--line-bright);
  border-radius: 10px; overflow: hidden;
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.15), 0 20px 80px rgba(0, 0, 0, 0.5), inset 0 0 60px rgba(0, 240, 255, 0.03);
  transform: rotateY(-8deg) rotateX(3deg);
  transition: transform 0.6s; position: relative;
}
.terminal:hover { transform: rotateY(0) rotateX(0); }
.terminal::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--magenta), transparent);
  background-size: 200% 100%; animation: borderFlow 3s linear infinite;
}
@keyframes borderFlow { 0% { background-position: 0 0; } 100% { background-position: 200% 0; } }
.terminal-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; background: rgba(0, 0, 0, 0.3); border-bottom: 1px solid var(--line);
}
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot.red { background: #ff5f57; box-shadow: 0 0 8px #ff5f57; }
.terminal-dot.yellow { background: #febc2e; box-shadow: 0 0 8px #febc2e; }
.terminal-dot.green { background: #28c840; box-shadow: 0 0 8px #28c840; }
.terminal-title { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-3); margin-left: auto; letter-spacing: 1px; }
.terminal-body {
  padding: 22px; font-family: var(--font-mono);
  font-size: 0.82rem; line-height: 1.85; min-height: 300px;
}
.terminal-body .line { display: flex; gap: 8px; }
.terminal-body .prompt { color: var(--green); user-select: none; text-shadow: 0 0 8px rgba(0, 255, 157, 0.5); }
.terminal-body .cmd { color: var(--cyan); }
.terminal-body .output { color: var(--text-2); padding-left: 18px; }
.terminal-body .output .id { color: var(--amber); }
.terminal-body .output .data { color: var(--magenta); }
.terminal-body .comment { color: var(--text-3); padding-left: 18px; font-style: italic; }
.terminal-cursor {
  display: inline-block; width: 8px; height: 15px;
  background: var(--cyan); box-shadow: 0 0 8px var(--cyan);
  animation: blink 1s step-end infinite; vertical-align: middle; margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

.products-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px;
}
.product-card {
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex; flex-direction: column; position: relative;
}
.product-card::before {
  content: ''; position: absolute; inset: 0;
  border-radius: 12px; padding: 1px;
  background: linear-gradient(135deg, transparent 40%, var(--cyan) 50%, transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity 0.4s; pointer-events: none;
}
.product-card:hover::before { opacity: 1; }
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 240, 255, 0.15), 0 0 0 1px rgba(0, 240, 255, 0.2);
}
.product-img {
  height: 220px; background: linear-gradient(135deg, #23272f, #2b3240);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; border-bottom: 1px solid var(--line);
}
.product-img::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.1) 0%, transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(255, 0, 229, 0.08) 0%, transparent 25%);
}
.product-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(26, 29, 36, 0.55) 100%);
  pointer-events: none;
}
.product-img img {
  position: relative; z-index: 1;
  max-width: 88%; max-height: 88%;
  object-fit: contain;
  filter: drop-shadow(0 8px 24px rgba(0, 240, 255, 0.25));
  transition: transform 0.5s;
}
.product-card:hover .product-img img { transform: scale(1.06); }
.product-img .badge {
  position: absolute; top: 16px; right: 16px;
  background: rgba(255, 0, 229, 0.15); border: 1px solid var(--magenta);
  color: var(--magenta); font-family: var(--font-mono);
  font-size: 0.66rem; font-weight: 700; padding: 4px 12px;
  border-radius: 4px; letter-spacing: 1.5px; z-index: 2;
  box-shadow: 0 0 16px rgba(255, 0, 229, 0.4); text-transform: uppercase;
}
.product-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 { font-size: 1.12rem; margin-bottom: 6px; letter-spacing: 0.3px; }
.product-sub {
  font-family: var(--font-mono); font-size: 0.7rem;
  color: var(--cyan); margin-bottom: 12px; letter-spacing: 1px; text-transform: uppercase;
}
.product-desc { font-size: 0.86rem; color: var(--text-2); margin-bottom: 16px; flex: 1; }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.spec-tag {
  font-family: var(--font-mono); font-size: 0.66rem;
  padding: 3px 10px; border-radius: 4px;
  background: rgba(0, 240, 255, 0.06); color: var(--cyan);
  border: 1px solid rgba(0, 240, 255, 0.2); letter-spacing: 0.5px; white-space: nowrap;
}
.product-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; border-top: 1px solid var(--line); gap: 12px;
}
.product-price {
  font-size: 1.22rem; font-weight: 700; color: var(--text);
  font-family: var(--font-mono); white-space: nowrap;
}
.product-price small { font-size: 0.7rem; font-weight: 400; color: var(--text-3); }
.btn-buy {
  padding: 10px 18px; border-radius: 6px;
  background: linear-gradient(135deg, #ff006e, #ff3d00);
  color: #fff; font-size: 0.76rem; font-weight: 700;
  font-family: var(--font-mono); letter-spacing: 0.5px;
  text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
  transition: all 0.3s; border: none; cursor: pointer;
  box-shadow: 0 0 20px rgba(255, 0, 110, 0.35); white-space: nowrap;
}
.btn-buy:hover {
  transform: scale(1.05);
  box-shadow: 0 0 36px rgba(255, 0, 110, 0.7), 0 0 60px rgba(255, 0, 110, 0.3);
}

.guide-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px;
}
.guide-card {
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 24px 22px; transition: all 0.35s;
  display: flex; flex-direction: column; gap: 12px;
  position: relative; overflow: hidden;
}
.guide-card::after {
  content: ''; position: absolute; left: 0; top: 0;
  width: 3px; height: 0;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  transition: height 0.5s; border-radius: 0 4px 4px 0;
}
.guide-card:hover::after { height: 100%; }
.guide-card:hover {
  border-color: var(--line-bright);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 240, 255, 0.1);
}
.guide-card h4 {
  font-size: 1rem; color: var(--cyan);
  font-family: var(--font-mono); letter-spacing: 0.5px;
}
.guide-card p { font-size: 0.85rem; color: var(--text-2); flex: 1; }
.guide-card-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 12px; border-top: 1px solid var(--line); gap: 10px;
  flex-wrap: wrap;
}
.guide-clicks {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-3);
}
.guide-btns { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-csdn {
  padding: 7px 14px; border-radius: 6px;
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid rgba(0, 240, 255, 0.35);
  color: var(--cyan); font-size: 0.74rem; font-weight: 600;
  font-family: var(--font-mono); text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all 0.3s; cursor: pointer;
  white-space: nowrap;
}
.btn-csdn:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
  transform: translateY(-1px);
}

.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-list details {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  transition: all 0.3s;
}
.faq-list details:hover { border-color: var(--line-bright); }
.faq-list details[open] {
  border-color: var(--line-bright);
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.08);
}
.faq-list summary {
  cursor: pointer; font-weight: 600; color: var(--cyan);
  list-style: none; position: relative; padding-right: 28px;
  font-family: var(--font-mono); font-size: 0.92rem; letter-spacing: 0.3px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: '+'; position: absolute; right: 0; top: 50%;
  transform: translateY(-50%); font-size: 1.2rem;
  color: var(--cyan); transition: transform 0.3s; font-weight: 300;
}
.faq-list details[open] summary::after {
  content: '−'; transform: translateY(-50%) rotate(180deg);
}
.faq-list p {
  margin-top: 12px; color: var(--text-2);
  font-size: 0.9rem; line-height: 1.75; padding-left: 4px;
}

.download-category {
  margin-bottom: 50px; padding-bottom: 40px;
  border-bottom: 1px dashed var(--line);
}
.download-category:last-child { border-bottom: none; padding-bottom: 0; }
.download-cat-title {
  font-size: 1.5rem; font-weight: 800; color: var(--text);
  margin-bottom: 8px; display: flex; align-items: center; gap: 14px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line-bright);
  position: relative;
}
.download-cat-title::after {
  content: ''; position: absolute; bottom: -1px; left: 0;
  width: 100px; height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta), transparent);
  box-shadow: 0 0 12px var(--cyan);
}
.download-cat-title .cat-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.18), rgba(124, 58, 237, 0.18));
  border: 1px solid rgba(0, 240, 255, 0.35);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
}
.download-cat-desc { color: var(--text-2); font-size: 0.9rem; margin-bottom: 26px; padding-left: 52px; }
.download-subcat-title {
  font-size: 0.95rem; font-family: var(--font-mono);
  color: var(--cyan); letter-spacing: 1px;
  margin: 24px 0 14px; display: flex; align-items: center;
  gap: 10px; padding-left: 2px;
  text-shadow: 0 0 12px rgba(0, 240, 255, 0.35);
}
.download-subcat-title::before {
  content: ''; width: 4px; height: 16px;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  border-radius: 2px; box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}

.download-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 18px;
}
.download-card {
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 20px; transition: all 0.35s;
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}
.download-card::before {
  content: ''; position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.08), transparent);
  transition: left 0.7s;
}
.download-card:hover::before { left: 100%; }
.download-card:hover {
  border-color: var(--line-bright);
  background: rgba(0, 240, 255, 0.04);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.12);
}
.download-head { display: flex; align-items: flex-start; gap: 14px; }
.download-icon {
  width: 48px; height: 48px; min-width: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; transition: all 0.35s;
}
.download-card:hover .download-icon {
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4); border-color: var(--cyan);
}
.download-info { flex: 1; min-width: 0; }
.download-info h4 {
  font-size: 0.92rem; margin-bottom: 6px; letter-spacing: 0.2px;
  word-break: break-word; line-height: 1.4;
}
.download-info .download-meta {
  font-size: 0.75rem; color: var(--text-3);
  letter-spacing: 0.2px; line-height: 1.55; margin-bottom: 4px;
}
.download-size {
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--amber); letter-spacing: 0.3px;
}
.download-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 12px; border-top: 1px solid var(--line);
  gap: 8px; flex-wrap: wrap;
}
.download-count { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-3); }
.download-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-download {
  padding: 7px 14px; border-radius: 6px;
  background: linear-gradient(135deg, var(--green), #00cc7a);
  color: #1a1d24; font-size: 0.72rem; font-weight: 700;
  font-family: var(--font-mono); letter-spacing: 0.3px;
  text-decoration: none; display: inline-flex; align-items: center; gap: 5px;
  transition: all 0.3s; border: none; cursor: pointer;
  box-shadow: 0 0 16px rgba(0, 255, 157, 0.3); white-space: nowrap;
}
.btn-download:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(0, 255, 157, 0.6), 0 0 50px rgba(0, 255, 157, 0.25);
}
.btn-download.official {
  background: linear-gradient(135deg, #4f8fff, #0055ff);
  color: #fff;
  box-shadow: 0 0 16px rgba(79, 143, 255, 0.35);
}
.btn-download.official:hover {
  box-shadow: 0 0 30px rgba(79, 143, 255, 0.65), 0 0 50px rgba(79, 143, 255, 0.3);
}

.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: start; }
.about-text p { color: var(--text-2); margin-bottom: 14px; font-size: 0.94rem; line-height: 1.75; }
.about-features { display: flex; flex-direction: column; gap: 12px; }
.feature-row {
  display: flex; gap: 16px; padding: 18px;
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: 10px;
  transition: all 0.35s; position: relative; overflow: hidden;
}
.feature-row::after {
  content: ''; position: absolute; left: 0; top: 0;
  width: 2px; height: 100%;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  opacity: 0; transition: opacity 0.35s;
}
.feature-row:hover::after { opacity: 1; }
.feature-row:hover {
  border-color: var(--line-bright); transform: translateX(4px);
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.1);
}
.feature-row .feat-icon {
  font-size: 1.4rem; min-width: 40px; text-align: center;
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}
.feature-row h5 { font-size: 0.94rem; margin-bottom: 4px; letter-spacing: 0.3px; }
.feature-row p { font-size: 0.82rem; color: var(--text-2); }

.contact-block {
  margin-top: 22px; padding: 16px 18px;
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--line-bright); border-radius: 10px;
  position: relative; overflow: hidden;
}
.contact-block::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--magenta), transparent);
  background-size: 200% 100%;
  animation: borderFlow 4s linear infinite;
}
.contact-title {
  font-size: 0.92rem; font-family: var(--font-mono);
  color: var(--cyan); letter-spacing: 1px;
  margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
  text-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
}
.contact-list { display: flex; flex-direction: column; gap: 8px; }
.contact-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  background: rgba(0, 240, 255, 0.04);
  border: 1px solid var(--line); border-radius: 6px;
  text-decoration: none; color: var(--text);
  transition: all 0.3s; font-size: 0.84rem;
}
.contact-item:hover {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.08);
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}
.contact-item .ci-icon {
  width: 28px; height: 28px; min-width: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(124, 58, 237, 0.1));
  border: 1px solid rgba(0, 240, 255, 0.3);
  font-size: 0.88rem;
}
.contact-item .ci-label {
  font-family: var(--font-mono); font-size: 0.62rem;
  color: var(--text-3); letter-spacing: 1px; display: block;
}
.contact-item .ci-value {
  color: var(--text); font-weight: 600; letter-spacing: 0.3px; font-size: 0.84rem;
}
.contact-item.shop .ci-value { color: var(--amber); }
.contact-note {
  margin-top: 12px; padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--text-2); font-size: 0.78rem;
  font-style: italic; text-align: center;
}

footer {
  position: relative; z-index: 5;
  border-top: 1px solid var(--line);
  padding: 40px 5% 36px; text-align: center;
  color: var(--text-3); font-size: 0.82rem;
  background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.02));
  font-family: var(--font-mono);
}
footer::before {
  content: ''; position: absolute; top: 0; left: 50%;
  transform: translateX(-50%); width: 200px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 12px var(--cyan);
}
footer a {
  color: var(--text-2); text-decoration: none;
  margin: 0 12px; transition: all 0.3s; letter-spacing: 0.5px;
}
footer a:hover { color: var(--cyan); text-shadow: 0 0 12px rgba(0, 240, 255, 0.6); }
footer a.shop-link { color: var(--amber); }
footer a.shop-link:hover { color: var(--amber); text-shadow: 0 0 12px rgba(255, 184, 0, 0.7); }
.footer-links { margin-bottom: 18px; }
.footer-operator {
  margin-top: 10px; font-size: 0.74rem;
  opacity: 0.7; letter-spacing: 0.3px; line-height: 1.8;
}
.footer-operator a { margin: 0 4px; }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero h1 { font-size: 2.8rem; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  section { padding: 50px 5% 36px; }
  .nav-links {
    display: none; position: absolute;
    top: 72px; left: 0; right: 0;
    background: rgba(26, 29, 36, 0.98); backdrop-filter: blur(20px);
    flex-direction: column; padding: 16px 5%;
    border-bottom: 1px solid var(--line-bright); gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 2.1rem; letter-spacing: -0.5px; }
  .section-title { font-size: 1.85rem; }
  .products-grid, .guide-grid, .download-grid { grid-template-columns: 1fr; }
  .terminal { transform: none; }
  .nav-logo { font-size: 1rem; }
  .nav-logo .ver { display: none; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .section-title { font-size: 1.55rem; }
  .btn { padding: 12px 22px; font-size: 0.82rem; }
  .product-footer { flex-direction: column; align-items: stretch; }
  .btn-buy { justify-content: center; }
  .download-cat-title { font-size: 1.2rem; }
  .download-cat-desc { padding-left: 0; }
}