/*
Theme Name: ZYQ Portfolio v5 (3D Cyber)
Theme URI: https://vipzyq.cn
Author: ZYQ
Author URI: https://vipzyq.cn
Description: 深色赛博霓虹单页 — 终端预加载 / 自定义光标 / 鼠标聚光 / 视差 / 字符扰动 / 数据雨 / 边框流光 / AI 生成插画
Version: 5.5
Tags: dark, portfolio, one-page
*/

/* ====== 基础变量 ====== */
:root {
  --bg-0: #050816;
  --bg-1: #0a0f24;
  --bg-2: #121833;
  --neon-cyan: #00d4ff;
  --neon-magenta: #ff4f9d;
  --neon-purple: #b14aff;
  --neon-yellow: #ffd54f;
  --text-0: #f0f4ff;
  --text-1: #b8c2e0;
  --text-2: #6e7ba0;
  --glass: rgba(15, 22, 50, 0.55);
  --glass-border: rgba(120, 180, 255, 0.18);
  --shadow-neon: 0 0 28px rgba(0, 212, 255, 0.35);
  --max-width: 1240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Manrope', -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg-0);
  color: var(--text-0);
  overflow-x: hidden;
  line-height: 1.65;
  font-weight: 300;
  letter-spacing: 0.2px;
}
a { color: var(--neon-cyan); text-decoration: none; transition: color 0.2s, text-shadow 0.2s; }
a:hover { color: var(--neon-magenta); text-shadow: 0 0 8px rgba(255, 79, 157, 0.6); }

/* ====== 顶部导航 ====== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 32px;
  display: flex; justify-content: space-between; align-items: center;
  transition: all 0.3s;
}
.nav.scrolled {
  background: rgba(5, 8, 22, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px 32px;
}
.nav-logo {
  font-weight: 700; font-size: 18px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 2px;
}
.nav-logo::before {
  content: '> '; color: var(--neon-cyan); -webkit-text-fill-color: var(--neon-cyan);
}
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  color: var(--text-1); font-size: 14px; letter-spacing: 1px;
  text-transform: uppercase; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 1px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--text-0); }
.nav-links a:hover::after { width: 100%; }
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ====== 通用 section ====== */
section {
  padding: 100px 32px;
  position: relative;
}
.container { max-width: var(--max-width); margin: 0 auto; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  border-radius: 2px;
  margin-bottom: 18px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}
.section-tag::before { content: '// '; opacity: 0.7; }
.section-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.section-title .accent {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-sub {
  color: var(--text-2);
  font-size: 16px;
  max-width: 640px;
  margin-bottom: 56px;
}

/* ====== Hero ====== */
.hero {
  min-height: 100vh;
  padding: 0 32px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-canvas {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(ellipse at 50% 100%, rgba(177, 74, 255, 0.18), transparent 60%),
              radial-gradient(ellipse at 20% 0%, rgba(0, 212, 255, 0.12), transparent 50%),
              var(--bg-0);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('assets/hero/01-hero-bg.png?v=5.0');
  background-size: cover; background-position: center;
  opacity: 0.35;
  mix-blend-mode: screen;
  filter: hue-rotate(-10deg) saturate(1.1);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, var(--bg-0) 95%);
}
/* ====== v3: 新增图层(2026-09-28) ====== */
/* 生成的赛博星云背景图 */
.hero-nebula {
  position: absolute; inset: 0; z-index: 1;
  background-image: url('assets/hero/02-hero-nebula.jpg?v=5.0');
  background-size: cover;
  background-position: center 45%;
  opacity: 0.42;
  mix-blend-mode: screen;
  filter: saturate(1.05) hue-rotate(-8deg);
}
/* 文字可读性遮罩(v6: 中央光柱 + 地平线高光球较亮,加压中央与地平线带) */
.hero-veil {
  position: absolute; inset: 0; z-index: 2;
  background:
    radial-gradient(ellipse 62% 48% at 50% 44%, rgba(5,8,22,0.74), transparent 74%),
    linear-gradient(180deg, rgba(5,8,22,0.58) 0%, transparent 24%, transparent 46%, rgba(5,8,22,0.42) 60%, rgba(5,8,22,0.72) 78%, var(--bg-0) 97%);
  pointer-events: none;
}
.hero-content { text-shadow: 0 2px 18px rgba(0, 0, 0, 0.75); }
.hero-content {
  position: relative; z-index: 3;
  text-align: center;
  max-width: 900px;
  margin-top: 80px;
}
.hero-greeting {
  display: inline-block;
  padding: 6px 18px;
  border: 1px solid var(--glass-border);
  border-radius: 30px;
  background: var(--glass);
  backdrop-filter: blur(8px);
  color: var(--neon-cyan);
  font-size: 13px;
  letter-spacing: 3px;
  margin-bottom: 32px;
  font-family: 'JetBrains Mono', monospace;
}
.hero-name {
  font-size: clamp(56px, 11vw, 132px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -3px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--text-0) 0%, var(--neon-cyan) 45%, var(--neon-magenta) 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  position: relative;
  animation: glitch 4s infinite;
}
@keyframes glitch {
  0%, 90%, 100% { text-shadow: none; transform: translate(0); }
  92% { transform: translate(-2px, 1px); text-shadow: 2px 0 var(--neon-cyan), -2px 0 var(--neon-magenta); }
  94% { transform: translate(2px, -1px); text-shadow: -2px 0 var(--neon-cyan), 2px 0 var(--neon-magenta); }
  96% { transform: translate(0); text-shadow: none; }
}
.hero-pinyin {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 300;
  color: var(--text-1);
  letter-spacing: 12px;
  margin-bottom: 32px;
  text-indent: 12px;
  font-family: 'JetBrains Mono', monospace;
  min-height: 1.6em;
}
.hero-pinyin .caret {
  display: inline-block;
  width: 0.55ch;
  height: 1em;
  margin-left: 6px;
  background: var(--neon-cyan);
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.8);
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.hero-tagline {
  font-size: clamp(16px, 1.8vw, 20px);
  color: var(--text-1);
  max-width: 700px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.hero-tagline .highlight {
  color: var(--neon-cyan);
  font-weight: 500;
}
.hero-tagline .hl-magenta { color: var(--neon-magenta); font-weight: 500; }
.hero-tagline .hl-yellow { color: var(--neon-yellow); font-weight: 500; }
.hero-cta {
  display: inline-flex; gap: 16px; flex-wrap: wrap; justify-content: center;
}
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 4px;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 500;
  transition: all 0.25s;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: var(--bg-0);
  box-shadow: var(--shadow-neon);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.7);
  color: var(--bg-0);
}
.btn-ghost {
  background: var(--glass);
  color: var(--text-0);
  border-color: var(--glass-border);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}
.scroll-hint {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  z-index: 3;
  color: var(--text-2);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: bob 2s infinite ease-in-out;
}
.scroll-hint::after {
  content: ''; width: 1px; height: 32px;
  background: linear-gradient(180deg, var(--neon-cyan), transparent);
}
@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

/* ====== 关于我 ====== */
.about { background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%); }
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-avatar { margin: 0 auto; }
}
.about-avatar {
  position: relative;
  width: 260px; height: 260px;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta), var(--neon-purple), var(--neon-yellow));
  background-size: 300% 300%;
  animation: rotate-grad 8s linear infinite;
  cursor: pointer;
  transition: box-shadow 0.3s;
}
.about-avatar:hover {
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.5), 0 0 64px rgba(255, 79, 157, 0.25);
}
@keyframes rotate-grad { 0% { background-position: 0% 50%; } 100% { background-position: 200% 50%; } }
.about-avatar img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 4px solid var(--bg-1);
}
.about-avatar::before, .about-avatar::after {
  content: ''; position: absolute; border-radius: 50%;
  pointer-events: none;
}
.about-avatar::before {
  inset: -12px;
  border: 1px dashed var(--neon-cyan);
  opacity: 0.4;
  animation: spin 20s linear infinite reverse;
}
.about-avatar::after {
  inset: -24px;
  border: 1px dotted var(--neon-magenta);
  opacity: 0.3;
  animation: spin 30s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.about-text p {
  color: var(--text-1);
  font-size: 17px;
  margin-bottom: 18px;
  line-height: 1.85;
}
.about-tags { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.tag {
  padding: 6px 16px;
  border-radius: 30px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  color: var(--text-1);
  backdrop-filter: blur(6px);
}
.tag::before { content: '# '; color: var(--neon-cyan); }

/* ====== 项目 ====== */
.projects { background: var(--bg-1); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.project-card {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: block;
  color: inherit;
}
.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--neon-cyan);
  box-shadow: 0 20px 60px rgba(0, 212, 255, 0.18), 0 0 30px rgba(255, 79, 157, 0.1);
  color: inherit;
}
.project-card .project-thumb::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(0, 212, 255, 0.22) 48%, rgba(255, 79, 157, 0.28) 52%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
  z-index: 2;
  pointer-events: none;
}
.project-card:hover .project-thumb::before {
  transform: translateX(120%);
}
.project-thumb .placeholder-icon {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 900;
  letter-spacing: -2px;
  transition: transform 0.4s ease, text-shadow 0.4s ease;
}
.project-card:hover .project-thumb .placeholder-icon {
  transform: scale(1.06);
}
.project-thumb {
  width: 100%; aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
  background: var(--bg-2);
}
.project-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s;
}
.project-card:hover .project-thumb img { transform: scale(1.06); }
.project-thumb::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5, 8, 22, 0.85) 100%);
}
.project-body { padding: 24px 28px 28px; }
.project-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--neon-cyan);
  letter-spacing: 2px;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.project-title {
  font-size: 22px; font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}
.project-desc { color: var(--text-1); font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
.project-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--neon-cyan);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}
.project-link::after { content: '→'; transition: transform 0.2s; }
.project-card:hover .project-link::after { transform: translateX(4px); }

/* ====== 服务器实时数据 ====== */
.stats { background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.stat-card {
  padding: 32px 24px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  text-align: center;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
}
.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.stat-card:hover::before { opacity: 1; }
.stat-value {
  font-size: 44px; font-weight: 800;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-family: 'JetBrains Mono', monospace;
  line-height: 1;
  margin-bottom: 10px;
}
.stat-unit { font-size: 14px; color: var(--text-2); margin-left: 4px; font-weight: 400; }
.stat-label { font-size: 13px; color: var(--text-1); letter-spacing: 2px; text-transform: uppercase; }
.stat-bar {
  height: 4px; background: rgba(255,255,255,0.06); border-radius: 2px;
  margin-top: 16px; overflow: hidden;
}
.stat-bar-fill {
  height: 100%; background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  border-radius: 2px;
  transition: width 0.8s ease;
}

/* ====== 技能 / 兴趣 ====== */
.interests { background: var(--bg-0); }
.interests-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.interest-card {
  padding: 36px 32px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
}
.interest-card:hover { transform: translateY(-6px); border-color: var(--neon-magenta); }
.interest-card.dev:hover { border-color: var(--neon-cyan); }
.interest-card.games:hover { border-color: var(--neon-magenta); }
.interest-card.acg:hover { border-color: var(--neon-purple); }
.interest-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(177,74,255,0.15));
  border: 1px solid var(--glass-border);
}
.interest-title { font-size: 22px; font-weight: 600; margin-bottom: 12px; }
.interest-desc { color: var(--text-1); font-size: 14px; line-height: 1.75; margin-bottom: 20px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 4px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--neon-cyan);
  font-family: 'JetBrains Mono', monospace;
}
.interest-card.games .chip {
  background: rgba(255, 79, 157, 0.08);
  border-color: rgba(255, 79, 157, 0.25);
  color: var(--neon-magenta);
}
.interest-card.acg .chip {
  background: rgba(177, 74, 255, 0.08);
  border-color: rgba(177, 74, 255, 0.25);
  color: var(--neon-purple);
}

/* ====== 联系 ====== */
.contact {
  background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-2) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
/* v3: 联系区网络拓扑背景 */
.contact-net {
  position: absolute; inset: 0; z-index: -2;
  background-image: url('assets/hero/03-contact-net.jpg?v=5.0');
  background-size: cover;
  background-position: center 48%;
  opacity: 0.5;
  filter: saturate(0.9) brightness(0.9);
}
/* 压暗遮罩 + 右侧高光反向压制(保证文字可读) */
.contact-veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 55% 60% at 70% 50%, rgba(5,8,22,0.72), transparent 70%),
    linear-gradient(180deg, var(--bg-0) 0%, rgba(5,8,22,0.52) 45%, var(--bg-2) 100%);
  pointer-events: none;
}
.contact .container { position: relative; z-index: 1; }
.contact .container { max-width: 720px; }
.contact-title {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -1.5px;
}
.contact-title .accent {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.contact-text { color: var(--text-1); font-size: 17px; margin-bottom: 40px; }
.contact-links {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px;
}
.contact-link {
  padding: 12px 24px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-0);
  display: inline-flex; align-items: center; gap: 10px;
  transition: all 0.25s;
}
.contact-link:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  transform: translateY(-2px);
}
.contact-link .icon { font-size: 18px; }

footer {
  text-align: center;
  padding: 36px 24px 24px;
  color: var(--text-2);
  font-size: 13px;
  border-top: 1px solid var(--glass-border);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}
footer .sep { color: var(--neon-cyan); margin: 0 10px; }

/* ====== 滚动 fade-in ====== */
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ====== v3: 装饰元素 ====== */
/* 各区块之间的电路纹理装饰 */
.section-deco {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('assets/hero/04-deco-grid.jpg?v=5.0');
  background-size: 520px 520px;
  opacity: 0.05;
  pointer-events: none;
  mix-blend-mode: screen;
}
.about, .projects, .stats, .interests { position: relative; isolation: isolate; }
.about .section-deco, .projects .section-deco, .stats .section-deco, .interests .section-deco { z-index: -1; }

/* 标题下方的霓虹装饰线 */
.section-title { position: relative; display: inline-block; }
.section-title::after {
  content: '';
  position: absolute; left: 0; bottom: -10px;
  width: 54px; height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.65);
  border-radius: 2px;
}

/* 区块角标装饰(右上角方括号) */
section::after {
  content: '';
  position: absolute; top: 34px; right: 34px;
  width: 22px; height: 22px;
  border-top: 1px solid rgba(0, 212, 255, 0.5);
  border-right: 1px solid rgba(0, 212, 255, 0.5);
  pointer-events: none;
  opacity: 0.7;
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 200;
  height: 2px; width: 0;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta), var(--neon-purple));
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.7);
  transition: width 0.12s linear;
}

/* 卡片顶部霓虹描边扫光增强 */
.project-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
  opacity: 0; transition: opacity 0.35s;
  z-index: 3;
}
.project-card:hover::before { opacity: 1; }

@media (max-width: 720px) {
  section::after { display: none; }
  .hero-nebula { opacity: 0.3; }
}
@media (max-width: 720px) {
  section { padding: 72px 20px; }
  .hero { padding: 0 20px; }
  .nav { padding: 14px 20px; }
  .stat-value { font-size: 36px; }
}
</content>
</invoke>