/* =========================================================
   蛋挞快跑 · 官方下载页
   设计语言与 E零工作室官网保持一致（浅色科技风 / 蓝紫渐变）
   ========================================================= */

* {
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #f0f2f8;
  --bg-card: #ffffff;
  --accent: #3366ff;
  --accent2: #7c4dff;
  --accent3: #0fa98c;
  --text: #16162e;
  --text-dim: #5e5e80;
  --glow: rgba(51, 102, 255, 0.15);
  --glow2: rgba(124, 77, 255, 0.12);
  --glass: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.4);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.06);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
  --radius: 20px;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
}
a { color: inherit; }
code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.85em;
  background: rgba(51,102,255,0.07);
  color: var(--accent);
  padding: 0.15em 0.45em;
  border-radius: 6px;
}
.container { max-width: 1200px; margin: 0 auto; }

/* ===== NAVBAR ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1rem 3rem;
  display: flex; align-items: center; justify-content: space-between;
  backdrop-filter: blur(24px) saturate(1.4);
  background: rgba(240,242,248,0.75);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s cubic-bezier(.4,0,.2,1);
}
nav.scrolled {
  padding: 0.6rem 3rem;
  background: rgba(240,242,248,0.92);
  box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}
.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: 1.15rem; font-weight: 900;
  text-decoration: none; letter-spacing: 1px;
}
.nav-logo img { border-radius: 9px; display: block; }
.nav-logo span {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-dim); text-decoration: none; font-size: 0.9rem;
  font-weight: 500; letter-spacing: 0.5px; transition: color 0.3s;
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 0.3s; border-radius: 2px;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  position: relative; padding: 7rem 2rem 4rem;
  background:
    radial-gradient(ellipse 70% 50% at 15% 35%, rgba(51,102,255,0.10) 0%, transparent 70%),
    radial-gradient(ellipse 50% 45% at 85% 65%, rgba(124,77,255,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 35% at 50% 85%, rgba(15,169,140,0.06) 0%, transparent 70%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 25s linear infinite;
}
@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}
.hero-content { text-align: center; position: relative; z-index: 2; max-width: 860px; }
.hero-badge {
  display: inline-block; padding: 0.5rem 1.4rem; border-radius: 100px;
  background: rgba(51,102,255,0.06); border: 1px solid rgba(51,102,255,0.12);
  font-size: 0.78rem; color: var(--accent); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 2rem;
  animation: fadeUp 0.8s ease-out 0.2s both;
  backdrop-filter: blur(8px);
}
.hero h1 {
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900; letter-spacing: 3px; line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 50%, var(--accent2) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  animation: fadeUp 0.8s ease-out 0.4s both, gradientShift 6s ease infinite;
}
@keyframes gradientShift {
  0%,100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero-sub {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(0.8rem, 2vw, 1.05rem); color: var(--text-dim);
  margin-top: 1.2rem; font-weight: 400; letter-spacing: 8px;
  animation: fadeUp 0.8s ease-out 0.6s both;
}
.hero-line {
  width: 60px; height: 2px; margin: 2.2rem auto;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  animation: fadeUp 0.8s ease-out 0.8s both;
}
.hero-desc {
  max-width: 560px; margin: 0 auto; font-size: 0.98rem;
  color: var(--text-dim); line-height: 1.9;
  animation: fadeUp 0.8s ease-out 1s both;
}
.hero-actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  margin-top: 2.5rem;
  animation: fadeUp 0.8s ease-out 1.2s both;
}
.hero-btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.9rem 2.2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; font-weight: 700; font-size: 0.9rem;
  border: none; border-radius: 100px; cursor: pointer;
  text-decoration: none; letter-spacing: 1px;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(51,102,255,0.3);
}
.hero-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 36px rgba(51,102,255,0.4); }
.hero-btn.ghost {
  background: rgba(255,255,255,0.7); color: var(--text);
  border: 1px solid rgba(0,0,0,0.06); box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px); font-weight: 600;
}
.hero-btn.ghost:hover { box-shadow: var(--shadow-md); }
.hero-trust {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 2.5rem;
  margin-top: 3.2rem;
  animation: fadeUp 0.8s ease-out 1.4s both;
}
.hero-trust > div { text-align: center; }
.hero-trust span {
  display: block; font-size: 0.72rem; color: var(--text-dim);
  letter-spacing: 1px; margin-bottom: 0.3rem;
}
.hero-trust strong {
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: 0.92rem; font-weight: 700; color: var(--text);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.particles { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.particle {
  position: absolute; border-radius: 50%;
  animation: float linear infinite;
  will-change: transform, opacity;
}
@keyframes float {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* ===== SECTIONS ===== */
section { padding: 7rem 2rem; position: relative; }
.soft-section { background: linear-gradient(180deg, rgba(255,255,255,0.5), rgba(255,255,255,0)); }
.section-label {
  font-family: 'Orbitron', sans-serif; font-size: 0.7rem;
  color: var(--accent); letter-spacing: 4px; text-transform: uppercase;
  text-align: center; margin-bottom: 0.8rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700;
  text-align: center; margin-bottom: 1rem;
}
.section-desc {
  text-align: center; color: var(--text-dim); max-width: 620px;
  margin: 0 auto 4rem; font-size: 0.95rem; line-height: 1.8;
}

/* ===== ANNOUNCEMENT ===== */
#announcement { padding: 0 2rem; }
.announcement-wrap {
  max-width: 1200px; margin: -3rem auto 0; position: relative; z-index: 5;
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-md); overflow: hidden;
}
.announcement-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 1.6rem; cursor: pointer;
  background: linear-gradient(90deg, rgba(51,102,255,0.05), rgba(124,77,255,0.03));
}
.announcement-title {
  display: flex; align-items: center; gap: 0.7rem;
  font-weight: 700; font-size: 0.95rem; letter-spacing: 0.5px;
}
.announcement-title i { color: var(--accent); }
.announcement-toggle {
  background: none; border: none; cursor: pointer; color: var(--text-dim);
  font-size: 0.95rem; padding: 4px 6px; transition: transform 0.3s;
}
.announcement-wrap.collapsed .announcement-toggle { transform: rotate(180deg); }
.announcement-list {
  max-height: 600px; transition: max-height 0.45s cubic-bezier(.4,0,.2,1);
}
.announcement-wrap.collapsed .announcement-list { max-height: 0; overflow: hidden; }
.ann-item {
  padding: 1.1rem 1.6rem;
  border-top: 1px solid rgba(0,0,0,0.04);
}
.ann-meta { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.5rem; }
.ann-badge {
  padding: 0.18rem 0.7rem; border-radius: 100px;
  font-size: 0.68rem; font-weight: 600; color: #fff; letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}
.ann-badge.badge-red {
  background: linear-gradient(135deg, #ff4444, #ff6b6b);
  box-shadow: 0 2px 8px rgba(255,68,68,0.25);
}
.ann-badge.badge-blue {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 2px 8px rgba(51,102,255,0.25);
}
.ann-date { font-size: 0.75rem; color: var(--text-dim); letter-spacing: 0.5px; }
.ann-text { font-size: 0.88rem; color: var(--text-dim); line-height: 1.85; }
.ann-text b { color: var(--text); }

/* ===== FEATURES ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 2.2rem;
  border: 1px solid rgba(0,0,0,0.04);
  transition: transform 0.4s cubic-bezier(.4,0,.2,1), box-shadow 0.4s;
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s cubic-bezier(.4,0,.2,1);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex;
  align-items: center; justify-content: center; font-size: 1.2rem;
  margin-bottom: 1.4rem; transition: transform 0.3s;
}
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-card:nth-child(1) .feature-icon { background: rgba(51,102,255,0.1); color: #3366ff; }
.feature-card:nth-child(2) .feature-icon { background: rgba(124,77,255,0.1); color: #7c4dff; }
.feature-card:nth-child(3) .feature-icon { background: rgba(15,169,140,0.1); color: #0fa98c; }
.feature-card:nth-child(4) .feature-icon { background: rgba(255,171,0,0.1); color: #ffab00; }
.feature-card:nth-child(5) .feature-icon { background: rgba(255,64,129,0.1); color: #ff4081; }
.feature-card:nth-child(6) .feature-icon { background: rgba(0,176,255,0.1); color: #00b0ff; }
.feature-num {
  position: absolute; top: 1.6rem; right: 1.8rem;
  font-family: 'Orbitron', sans-serif; font-size: 0.7rem;
  color: var(--accent); opacity: 0.35; letter-spacing: 2px;
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 0.7rem; font-weight: 700; }
.feature-card p { color: var(--text-dim); font-size: 0.88rem; line-height: 1.8; }

/* ===== STATS ===== */
.stats-section {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  padding: 5rem 2rem;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.06) 0%, transparent 50%);
}
.stats-row {
  display: flex; justify-content: center; gap: 4rem; flex-wrap: wrap;
  position: relative; z-index: 1;
}
.stat-item { text-align: center; }
.stat-num {
  font-family: 'Orbitron', sans-serif; font-size: 3rem;
  font-weight: 900; color: #fff;
}
.stat-label { color: rgba(255,255,255,0.78); font-size: 0.9rem; margin-top: 0.3rem; }

/* ===== DOWNLOAD ===== */
.download-layout {
  display: grid; grid-template-columns: 1.55fr 1fr; gap: 1.5rem;
  align-items: start;
}
.download-card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid rgba(51,102,255,0.12);
  box-shadow: var(--shadow-md);
  padding: 2.2rem; position: relative; overflow: hidden;
}
.download-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
}
.download-head {
  display: flex; align-items: center; gap: 1.1rem;
  padding-bottom: 1.5rem; border-bottom: 1px solid rgba(0,0,0,0.05);
}
.download-app-icon {
  width: 62px; height: 62px; border-radius: 16px; flex-shrink: 0;
  box-shadow: 0 6px 20px rgba(51,102,255,0.22);
}
.download-head-text { flex: 1; min-width: 0; }
.download-head-text h3 { font-size: 1.35rem; font-weight: 700; display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.download-head-text p { color: var(--text-dim); font-size: 0.85rem; margin-top: 0.2rem; }
.version-tag {
  font-family: 'Orbitron', sans-serif; font-size: 0.7rem; font-weight: 700;
  padding: 0.2rem 0.65rem; border-radius: 100px; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  letter-spacing: 1px;
}
.download-live {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; color: var(--accent3); font-weight: 600;
  padding: 0.3rem 0.8rem; border-radius: 100px;
  background: rgba(15,169,140,0.09); white-space: nowrap;
}
.download-live i { font-size: 0.45rem; animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.download-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.2rem 1.6rem; padding: 1.6rem 0;
}
.download-meta > div { min-width: 0; }
.download-meta span {
  display: block; font-size: 0.72rem; color: var(--text-dim);
  letter-spacing: 0.5px; margin-bottom: 0.25rem;
}
.download-meta strong { font-size: 0.9rem; font-weight: 600; word-break: break-all; }
.download-btns { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.btn-primary, .btn-secondary {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.8rem; border-radius: 100px;
  font-size: 0.88rem; font-weight: 700; text-decoration: none;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
  letter-spacing: 0.5px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; box-shadow: 0 4px 20px rgba(51,102,255,0.3);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(51,102,255,0.4); }
.btn-secondary {
  background: rgba(0,0,0,0.04); color: var(--text-dim);
}
.btn-secondary:hover { background: rgba(0,0,0,0.08); color: var(--text); }
.download-foot {
  margin-top: 1.5rem; padding-top: 1.3rem;
  border-top: 1px dashed rgba(0,0,0,0.07);
  font-size: 0.78rem; color: var(--text-dim); line-height: 1.7;
  display: flex; gap: 0.55rem; align-items: flex-start;
}
.download-foot i { color: var(--accent); margin-top: 3px; }
.download-side { display: flex; flex-direction: column; gap: 1.5rem; }
.side-card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.04); padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}
.side-card.soft {
  background: linear-gradient(160deg, rgba(51,102,255,0.05), rgba(124,77,255,0.04));
  border-color: rgba(51,102,255,0.1);
}
.mini-label {
  display: inline-block; font-size: 0.68rem; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.6rem;
}
.side-card h4 { font-size: 1.05rem; margin-bottom: 1rem; font-weight: 700; }
.side-card p { font-size: 0.85rem; color: var(--text-dim); line-height: 1.8; }
.check-list { list-style: none; }
.check-list li {
  display: flex; align-items: flex-start; gap: 0.6rem;
  font-size: 0.85rem; color: var(--text-dim);
  padding: 0.45rem 0; line-height: 1.65;
}
.check-list i { color: var(--accent3); font-size: 0.78rem; margin-top: 6px; }
.btn-copy {
  margin-top: 1.2rem; width: 100%;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.75rem 1.2rem; border: none; border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; font-size: 0.85rem; font-weight: 600; cursor: pointer;
  font-family: inherit; transition: transform 0.3s, box-shadow 0.3s;
}
.btn-copy:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(51,102,255,0.3); }

/* ===== GUIDE ===== */
.steps-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.3rem; margin-bottom: 3rem;
}
.step-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 1.9rem;
  border: 1px solid rgba(0,0,0,0.04);
  transition: transform 0.4s cubic-bezier(.4,0,.2,1), box-shadow 0.4s;
  position: relative;
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step-index {
  display: inline-block; font-family: 'Orbitron', sans-serif;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 2px;
  color: var(--accent); margin-bottom: 0.9rem;
}
.step-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 0.55rem; }
.step-card p { font-size: 0.86rem; color: var(--text-dim); line-height: 1.8; }
.notice-card {
  display: flex; gap: 1.2rem; align-items: flex-start;
  background: linear-gradient(135deg, rgba(255,171,0,0.07), rgba(255,68,68,0.05));
  border: 1px solid rgba(255,171,0,0.2);
  border-radius: var(--radius); padding: 1.8rem 2rem;
}
.notice-icon {
  width: 46px; height: 46px; border-radius: 13px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,171,0,0.14); color: #e08a00; font-size: 1.1rem;
}
.notice-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.notice-card p { font-size: 0.85rem; color: var(--text-dim); line-height: 1.85; }

/* ===== TIMELINE ===== */
.timeline { max-width: 860px; margin: 0 auto; position: relative; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 10px; bottom: 10px;
  width: 2px; background: linear-gradient(180deg, var(--accent), rgba(124,77,255,0.15));
  border-radius: 2px;
}
.timeline-item { position: relative; padding-left: 2.6rem; margin-bottom: 2.2rem; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute; left: 0; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 4px rgba(51,102,255,0.12);
}
.timeline-dot.ghost {
  background: var(--bg-card); border: 2px solid rgba(51,102,255,0.25);
  box-shadow: 0 0 0 4px rgba(51,102,255,0.06);
}
.timeline-body {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.04); padding: 1.6rem 1.8rem;
  box-shadow: var(--shadow-sm);
}
.timeline-head { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 1rem; }
.timeline-version {
  font-family: 'Orbitron', sans-serif; font-size: 1.05rem; font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}
.timeline-date { font-size: 0.78rem; color: var(--text-dim); }
.timeline-badge {
  font-size: 0.66rem; font-weight: 700; letter-spacing: 1px; color: #fff;
  padding: 0.15rem 0.6rem; border-radius: 100px;
  background: linear-gradient(135deg, var(--accent3), #12a67e);
}
.timeline-list { list-style: none; }
.timeline-list li {
  position: relative; padding-left: 1.1rem;
  font-size: 0.87rem; color: var(--text-dim); line-height: 1.9;
}
.timeline-list li::before {
  content: ''; position: absolute; left: 0; top: 12px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent); opacity: 0.5;
}
.timeline-para { font-size: 0.87rem; color: var(--text-dim); line-height: 1.85; }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.contact-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 1.9rem;
  border: 1px solid rgba(0,0,0,0.04);
  display: flex; align-items: center; gap: 1.1rem;
  transition: transform 0.3s, box-shadow 0.3s;
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.contact-icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(51,102,255,0.1), rgba(124,77,255,0.08));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--accent);
}
.contact-card h4 { font-size: 0.95rem; margin-bottom: 0.2rem; font-weight: 600; }
.contact-card p { color: var(--text-dim); font-size: 0.85rem; }
.contact-card a { color: var(--text-dim); text-decoration: none; transition: color 0.3s; }
.contact-card a:hover { color: var(--accent); }

/* ===== FOOTER ===== */
footer {
  padding: 3.5rem 2rem 2.5rem; text-align: center;
  border-top: 1px solid rgba(0,0,0,0.04);
  position: relative;
}
.footer-brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-weight: 700; font-size: 0.95rem; margin-bottom: 0.9rem;
}
.footer-brand img { border-radius: 8px; }
footer p { color: var(--text-dim); font-size: 0.8rem; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; margin-top: 1.1rem; }
.footer-links a {
  color: var(--text-dim); text-decoration: none; font-size: 0.8rem;
  transition: color 0.3s; cursor: pointer;
}
.footer-links a:hover { color: var(--accent); }

/* ===== BACK TO TOP ===== */
.back-top {
  position: fixed; bottom: 2rem; right: 2rem;
  width: 44px; height: 44px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; opacity: 0; pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  box-shadow: 0 4px 16px rgba(51,102,255,0.3);
  z-index: 50;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); }

/* ===== TOAST ===== */
.toast {
  position: fixed; left: 50%; bottom: 2.5rem;
  transform: translate(-50%, 20px);
  background: rgba(22,22,46,0.92); color: #fff;
  padding: 0.7rem 1.5rem; border-radius: 100px;
  font-size: 0.85rem; letter-spacing: 0.5px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 300; backdrop-filter: blur(10px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(.4,0,.2,1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== HAMBURGER ===== */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; z-index: 101;
  padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all 0.3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== MOBILE NAV ===== */
.nav-overlay {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(240,242,248,0.98); backdrop-filter: blur(24px);
  z-index: 99; flex-direction: column; align-items: center; justify-content: center;
  gap: 2.5rem;
}
.nav-overlay.open { display: flex; }
.nav-overlay a {
  font-size: 1.1rem; letter-spacing: 1px; text-decoration: none;
  color: var(--text-dim); font-weight: 500; transition: color 0.3s;
}
.nav-overlay a:hover { color: var(--accent); }
.nav-overlay .overlay-close {
  position: absolute; top: 1rem; right: 1.5rem;
  background: none; border: none; font-size: 2rem; cursor: pointer;
  color: var(--text-dim); width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .download-layout { grid-template-columns: 1fr; }
  .hero-trust { gap: 1.8rem; }
  .stats-row { gap: 3rem; }
}
@media (max-width: 768px) {
  nav { padding: 0.7rem 1rem; }
  .nav-logo { font-size: 1rem; }
  .nav-logo img { width: 26px; height: 26px; }
  .nav-links { display: none !important; }
  .hamburger { display: flex; }
  section { padding: 3.5rem 1rem; }
  #announcement { padding: 0 1rem; }
  .announcement-wrap { margin-top: -2rem; }
  .section-desc { margin-bottom: 2.5rem; }
  .hero { padding: 6rem 1rem 3rem; min-height: auto; }
  .hero-trust { gap: 1.2rem 2rem; margin-top: 2.5rem; }
  .hero-actions .hero-btn { width: 100%; justify-content: center; }
  .features-grid { grid-template-columns: 1fr; gap: 1rem; }
  .feature-card { padding: 1.6rem; }
  .stats-section { padding: 3.2rem 1rem; }
  .stats-row { gap: 2rem 2.5rem; }
  .stat-num { font-size: 2.2rem; }
  .download-card { padding: 1.6rem; }
  .download-head { flex-wrap: wrap; }
  .download-app-icon { width: 52px; height: 52px; }
  .download-meta { grid-template-columns: 1fr 1fr; gap: 1rem 1.2rem; }
  .download-btns > a { width: 100%; justify-content: center; }
  .steps-grid { grid-template-columns: 1fr; gap: 1rem; }
  .step-card { padding: 1.5rem; }
  .notice-card { flex-direction: column; padding: 1.5rem; gap: 1rem; }
  .timeline-item { padding-left: 2.1rem; }
  .timeline-body { padding: 1.4rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 1rem; }
  .footer-links { gap: 1rem; }
}
@media (max-width: 420px) {
  .download-meta { grid-template-columns: 1fr; }
}