/* 加密网盘 / 私密金库视觉 — 本地字体，青绿冷调 + 琥珀校验色 */
:root {
  --bg-deep: #050a08;
  --bg-elevated: #0a1210;
  --bg-card: rgba(8, 18, 16, 0.82);
  --accent: #2dd4bf;
  --accent-dim: #14b8a6;
  --accent-2: #fbbf24;
  --accent-glow: rgba(45, 212, 191, 0.28);
  --accent-warn-glow: rgba(251, 191, 36, 0.15);
  --text: #e2f0ec;
  --text-muted: #6b8f85;
  --border: rgba(45, 212, 191, 0.14);
  --border-strong: rgba(45, 212, 191, 0.35);
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Code", "Consolas", "SF Mono", "Monaco", "Menlo",
    "Microsoft YaHei Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background: rgba(45, 212, 191, 0.35);
  color: var(--text);
}

/* 纵深网格 + 冷色晕光（无外链图片） */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 90% 55% at 15% -5%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(ellipse 50% 40% at 95% 5%, rgba(20, 184, 166, 0.1), transparent),
    radial-gradient(ellipse 45% 45% at 50% 105%, rgba(6, 78, 59, 0.45), transparent),
    var(--bg-deep);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.045) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 72% 58% at 50% 32%, black 18%, transparent 72%);
  pointer-events: none;
  animation: vault-grid-drift 28s ease-in-out infinite;
}

@keyframes vault-grid-drift {
  0%,
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
  50% {
    opacity: 0.82;
    transform: translate3d(-6px, 4px, 0);
  }
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.06) 2px,
    rgba(0, 0, 0, 0.06) 3px
  );
  opacity: 0.35;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.wrap {
  width: min(1120px, 100% - 40px);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px) saturate(1.1);
  background: rgba(5, 10, 8, 0.82);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(45, 212, 191, 0.06);
}

.site-header .wrap {
  position: relative;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo svg {
  flex-shrink: 0;
  filter: drop-shadow(0 0 12px var(--accent-glow));
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.nav a:hover {
  color: var(--text);
  background: rgba(45, 212, 191, 0.08);
  border-color: var(--border);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(165deg, #115e59 0%, #0f766e 45%, #0d9488 100%);
  color: #ecfeff;
  border: 1px solid var(--border-strong);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.2), 0 12px 36px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.35), 0 16px 44px var(--accent-glow);
}

.btn-ghost {
  background: rgba(15, 28, 24, 0.65);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(45, 212, 191, 0.07);
  border-color: var(--border-strong);
}

.menu-toggle {
  display: none;
  background: rgba(15, 28, 24, 0.65);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
}

@media (max-width: 860px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-wrap {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: rgba(5, 14, 12, 0.97);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .nav-wrap.is-open {
    max-height: 320px;
  }

  .nav {
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
  }

  .nav a {
    text-align: center;
  }

  .header-cta .btn-ghost {
    display: none;
  }
}

/* Hero */
.hero {
  padding: 72px 0 88px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 8px;
  background: rgba(15, 28, 24, 0.85);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 24px;
  box-shadow: inset 0 1px 0 rgba(45, 212, 191, 0.15);
}

.hero-badge svg {
  color: var(--accent-2);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.15rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #f0fdf9 0%, #5eead4 55%, #2dd4bf 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 40px rgba(45, 212, 191, 0.12));
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
}

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  backdrop-filter: blur(10px);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.25);
}

.stat-value {
  font-size: 1.65rem;
  font-weight: 700;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

@media (max-width: 600px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }
}

/* Sections */
.section {
  padding: 64px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: #ccfbf1;
  text-shadow: 0 0 42px rgba(45, 212, 191, 0.12);
}

.section-head p {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 900px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  backdrop-filter: blur(10px);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: inset 0 1px 0 rgba(45, 212, 191, 0.06);
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 24px var(--accent-glow);
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 14px;
  color: var(--accent);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: #e2f7f3;
}

.card p {
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* Flow */
.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

@media (max-width: 768px) {
  .flow {
    grid-template-columns: 1fr;
  }
}

.flow-step {
  position: relative;
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(45, 212, 191, 0.05);
}

.flow-step-num {
  width: 36px;
  height: 36px;
  margin: 0 auto 16px;
  border-radius: 8px;
  background: linear-gradient(145deg, #134e4a, #0f766e);
  color: #ecfeff;
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
}

.flow-desc {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-top: 8px;
}

.code-inline {
  font-size: 0.85em;
  color: var(--accent);
  font-family: var(--font-mono);
  background: rgba(15, 28, 24, 0.9);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.legal-card {
  max-width: 720px;
  margin: 0 auto;
}

.legal-text {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.flow-arrow {
  position: absolute;
  top: 50%;
  right: -18px;
  transform: translateY(-50%);
  color: var(--accent-dim);
  font-size: 1.15rem;
  z-index: 1;
  font-family: var(--font-mono);
  opacity: 0.7;
}

@media (max-width: 768px) {
  .flow-arrow {
    display: none;
  }
}

/* Platforms */
.platforms {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 900px) {
  .platforms {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .platforms {
    grid-template-columns: 1fr;
  }
}

.platform {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: inset 0 1px 0 rgba(45, 212, 191, 0.05);
}

.platform:hover {
  border-color: var(--border-strong);
  box-shadow: 0 0 20px var(--accent-glow);
}

.platform svg {
  width: 38px;
  height: 38px;
  margin-bottom: 12px;
  color: var(--accent-dim);
}

.platform h4 {
  font-size: 0.98rem;
  margin-bottom: 6px;
  color: #d1fae5;
}

.platform p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Download */
.download-zone {
  background: linear-gradient(
    180deg,
    rgba(45, 212, 191, 0.08) 0%,
    rgba(5, 10, 8, 0.4) 100%
  );
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 40px 32px;
  margin-top: 28px;
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.06), inset 0 1px 0 rgba(45, 212, 191, 0.1);
}

.download-zone h3 {
  text-align: center;
  font-size: 1.28rem;
  margin-bottom: 8px;
  color: #ccfbf1;
}

.download-zone > p {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 0.94rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}

.download-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(8, 22, 18, 0.75);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.download-item:hover {
  background: rgba(45, 212, 191, 0.08);
  border-color: var(--border-strong);
  box-shadow: 0 0 20px var(--accent-glow);
}

.download-item svg {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.download-item span strong {
  display: block;
  font-size: 0.94rem;
}

.download-item span small {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: var(--font-mono);
}

.download-hint {
  margin-top: 20px;
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Compare */
.compare {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .compare {
    grid-template-columns: 1fr;
  }
}

.compare-col {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg-card);
  box-shadow: inset 0 1px 0 rgba(45, 212, 191, 0.05);
}

.compare-col.featured {
  border-color: rgba(251, 191, 36, 0.45);
  background: linear-gradient(
    165deg,
    rgba(15, 28, 24, 0.92) 0%,
    rgba(68, 45, 8, 0.18) 100%
  );
  box-shadow: 0 0 0 1px var(--accent-warn-glow), 0 12px 40px rgba(0, 0, 0, 0.25);
}

.compare-col h4 {
  font-size: 0.98rem;
  margin-bottom: 8px;
  color: #ecfdf5;
}

.compare-col .tag {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.compare-col ul {
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.compare-col li {
  padding: 6px 0;
  padding-left: 18px;
  position: relative;
}

.compare-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 48px;
  background: linear-gradient(180deg, transparent, rgba(5, 12, 10, 0.6));
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.84rem;
}

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

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}