:root {
  --bg: #05060a;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.075);
  --border: rgba(255, 255, 255, 0.09);
  --text: #f4f5fa;
  --muted: #9aa1b8;
  --violet: #8b5cf6;
  --blue: #3b82f6;
  --cyan: #22d3ee;
  --gold: #f7c873;
  --radius: 22px;
  --shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.85);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ---------- 背景光晕 ---------- */

.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(1100px 600px at 50% -10%, rgba(124, 92, 255, 0.22), transparent 62%),
    radial-gradient(900px 500px at 88% 18%, rgba(34, 211, 238, 0.1), transparent 60%),
    radial-gradient(700px 500px at 6% 60%, rgba(236, 72, 153, 0.08), transparent 65%);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.5;
  animation: drift 22s ease-in-out infinite alternate;
}

.blob-a { width: 520px; height: 520px; left: -8%; top: 4%; background: #5b3df5; }
.blob-b { width: 440px; height: 440px; right: -6%; top: 22%; background: #0ea5b7; animation-delay: -7s; }
.blob-c { width: 380px; height: 380px; left: 38%; bottom: -14%; background: #a238b8; animation-delay: -13s; opacity: 0.35; }

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4%, -6%, 0) scale(1.12); }
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ---------- 头部 ---------- */

.site-header {
  position: relative;
  z-index: 5;
  max-width: 1180px;
  margin: 0 auto;
  padding: 26px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(145deg, rgba(139, 92, 246, 0.95), rgba(59, 130, 246, 0.9));
  box-shadow: 0 10px 26px -10px rgba(124, 92, 255, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.brand-mark svg { width: 24px; height: 24px; }
.brand-name { font-size: 18px; }

.site-nav { display: flex; align-items: center; gap: 8px; }

.site-nav a {
  font-size: 14px;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

.site-nav .nav-admin {
  border: 1px solid var(--border);
  color: #cfd3e2;
}

/* ---------- 主视觉 ---------- */

main { position: relative; z-index: 2; }

.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 68px 24px 26px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  padding: 8px 16px;
  font-size: 13px;
  color: #c8cbe0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6);
  animation: pulse 2.4s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.hero-title {
  margin: 0;
  font-size: clamp(46px, 9vw, 84px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #ffffff 20%, #c5c0f6 62%, #8f8ab6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 30px 70px rgba(124, 92, 255, 0.25);
}

.hero-slogan {
  margin: 20px auto 0;
  max-width: 560px;
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.75;
  color: var(--muted);
}

.notice {
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 26px;
  padding: 10px 18px;
  max-width: 620px;
  font-size: 13px;
  line-height: 1.6;
  text-align: left;
  color: #f0d9a8;
  border: 1px solid rgba(247, 200, 115, 0.24);
  border-radius: 14px;
  background: rgba(247, 200, 115, 0.07);
}

.notice svg { width: 16px; height: 16px; flex: none; margin-top: 2px; }

/* ---------- 下载区 ---------- */

.download-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 24px 40px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.section-head h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.section-head p { margin: 0; font-size: 13px; color: var(--muted); }

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.platform-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 24px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.018));
  background:
    radial-gradient(120% 90% at 100% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 58%),
    linear-gradient(165deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.018));
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.3, 1), border-color 0.28s ease, box-shadow 0.28s ease;
  animation: rise 0.65s cubic-bezier(0.2, 0.7, 0.3, 1) both;
  animation-delay: var(--delay, 0ms);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

.platform-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 55%, transparent), transparent 45%);
  -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 0.3s ease;
  pointer-events: none;
}

.platform-card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  box-shadow: 0 34px 80px -34px rgba(0, 0, 0, 0.95), 0 0 46px -22px var(--accent);
}

.platform-card:hover::after { opacity: 1; }

.platform-card.is-disabled { opacity: 0.55; }
.platform-card.is-disabled:hover { transform: none; box-shadow: var(--shadow); }

.platform-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.platform-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: 16px;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.05);
  background: color-mix(in srgb, var(--accent) 13%, rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-color: color-mix(in srgb, var(--accent) 26%, transparent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), 0 12px 28px -18px var(--accent);
}

.platform-icon svg { width: 26px; height: 26px; }

.platform-name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.platform-device {
  margin: 5px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.platform-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  color: #241a05;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffe1a3, var(--gold));
  box-shadow: 0 8px 20px -10px rgba(247, 200, 115, 0.8);
}

.platform-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 12px;
  color: #8d93a9;
  font-variant-numeric: tabular-nums;
}

.platform-meta span { display: inline-flex; align-items: center; gap: 6px; }
.platform-meta i { width: 3px; height: 3px; border-radius: 50%; background: rgba(255, 255, 255, 0.24); }

.platform-note {
  margin: 0 0 18px;
  font-size: 12.5px;
  line-height: 1.6;
  color: #7d8399;
  min-height: 20px;
}

.platform-actions { margin-top: auto; display: flex; gap: 8px; }

.btn-download {
  position: relative;
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  border: none;
  border-radius: 13px;
  cursor: pointer;
  background: linear-gradient(135deg, #7c5cff, #3b82f6);
  box-shadow: 0 14px 30px -16px rgba(99, 102, 241, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  overflow: hidden;
  transition: filter 0.2s ease, transform 0.2s ease;
  font-family: inherit;
}

.btn-download svg { width: 16px; height: 16px; }

.btn-download::before {
  content: "";
  position: absolute;
  top: 0;
  left: -70%;
  width: 45%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.42), transparent);
  transform: skewX(-18deg);
  transition: left 0.55s ease;
}

.btn-download:hover { filter: brightness(1.08); }
.btn-download:hover::before { left: 130%; }
.btn-download:active { transform: scale(0.985); }

.btn-download:disabled,
.btn-download[aria-disabled="true"] {
  cursor: not-allowed;
  background: rgba(255, 255, 255, 0.08);
  color: #8b90a6;
  box-shadow: none;
}
.btn-download:disabled::before { display: none; }

.btn-copy {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  color: #a9aec4;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-copy svg { width: 17px; height: 17px; }
.btn-copy:hover { color: #fff; background: rgba(255, 255, 255, 0.09); border-color: rgba(255, 255, 255, 0.2); }
.btn-copy:disabled { opacity: 0.4; cursor: not-allowed; }

.tip-line {
  margin: 30px 0 0;
  text-align: center;
  font-size: 12.5px;
  color: #666d84;
}

/* ---------- 骨架屏 ---------- */

.skeleton {
  height: 300px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(100deg, rgba(255, 255, 255, 0.035) 30%, rgba(255, 255, 255, 0.08) 50%, rgba(255, 255, 255, 0.035) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

@keyframes shimmer {
  from { background-position: 120% 0; }
  to { background-position: -120% 0; }
}

/* ---------- 关于 ---------- */

.about-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 34px 24px 6px;
}

.about-section h2 {
  margin: 0 0 14px;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: #e8eaf3;
}

.about-section p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.9;
  color: #b9bed0;
}

.about-section a {
  color: #a78bfa;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-points {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
  margin: 16px 0 0;
  padding: 0;
}

.about-points li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  font-size: 13px;
}

.about-points b { color: #e8eaf3; }
.about-points span { font-size: 12.5px; line-height: 1.6; color: var(--muted); }

/* ---------- 页脚 ---------- */

.site-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 46px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.014), transparent 70%);
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 24px 26px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-brand { max-width: 520px; }

.footer-title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #e8eaf3;
}

.footer-desc {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: #7b8199;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  padding-top: 2px;
  font-size: 12.5px;
}

.footer-links a { color: #a2a8bd; transition: color 0.2s ease; }
.footer-links a:hover { color: #fff; }

.footer-bottom {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #5f6579;
}

.copyright,
.footer-note { margin: 0; }

/* ---------- 提示浮层 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translate(-50%, 20px);
  padding: 11px 20px;
  font-size: 13px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(20, 21, 30, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 48px -20px rgba(0, 0, 0, 0.9);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 50;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 内容区块 ---------- */

/* ---------- QQ 群 ---------- */

.qq-section {
  max-width: 1180px;
  margin: 34px auto 0;
  padding: 0 24px;
}

.qq-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 30px 32px;
  border-radius: 22px;
  border: 1px solid rgba(120, 150, 255, 0.28);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(99, 102, 241, 0.28), transparent 60%),
    radial-gradient(120% 140% at 100% 100%, rgba(56, 189, 248, 0.18), transparent 60%),
    rgba(255, 255, 255, 0.035);
  overflow: hidden;
}

.qq-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: #a5a0ff;
}

.qq-copy h2 { margin: 6px 0 8px; font-size: 22px; }

.qq-copy p {
  margin: 0;
  max-width: 520px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.qq-actions { text-align: right; }

.qq-number { margin: 0 0 12px; font-size: 13px; color: var(--muted); }

.qq-number b { font-size: 22px; color: #fff; letter-spacing: 0.04em; }

.qq-buttons { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

.qq-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.qq-btn:hover { transform: translateY(-1px); }

.qq-btn-primary {
  color: #0b0d14;
  background: linear-gradient(135deg, #a78bfa, #60a5fa);
  box-shadow: 0 12px 26px -12px rgba(124, 92, 255, 0.9);
}

.qq-btn-ghost {
  color: #d7d9e6;
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.05);
}

.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- iOS 安装教程 ---------- */

.tutorial-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 20px 0 4px;
}

.tutorial-download {
  flex: none;
  min-width: 250px;
  text-decoration: none;
}

.tutorial-download[hidden] { display: none; }

.tutorial-download-hint {
  font-size: 12.5px;
  line-height: 1.6;
  color: #8d93a9;
}

.tutorial-download-hint[hidden] { display: none; }

.tutorial-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 56px;
}

.tutorial-kicker {
  margin: 0 0 8px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: #a78bfa;
}

.tutorial-title {
  margin: 0 0 14px;
  font-size: clamp(22px, 3vw, 29px);
  line-height: 1.3;
}

.tutorial-lead {
  margin: 0 0 8px;
  font-size: 13.5px;
  line-height: 1.85;
  color: #b9bed0;
}

.tutorial-page h2 {
  margin: 30px 0 12px;
  font-size: 15px;
  color: #e8eaf3;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.method-card {
  padding: 14px 15px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.method-card h4 { margin: 0 0 6px; font-size: 13.5px; color: #e8eaf3; }

.method-card p {
  margin: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #9aa1b8;
}

.method-tag {
  display: inline-block;
  padding: 3px 8px;
  font-size: 11px;
  color: #c9b3ff;
  border: 1px solid rgba(124, 92, 255, 0.3);
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.1);
}

.tutorial-steps {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.85;
  color: #b9bed0;
}

.tutorial-steps li { margin-bottom: 7px; }
.tutorial-steps li::marker { color: #a78bfa; font-weight: 600; }

.tutorial-list {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.85;
  color: #b9bed0;
}

.tutorial-list li { margin-bottom: 6px; }
.tutorial-list b { color: #e8eaf3; }

.tutorial-page code {
  padding: 1px 5px;
  font-size: 12px;
  color: #c9b3ff;
  background: rgba(124, 92, 255, 0.12);
  border-radius: 5px;
}

.trouble-table {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 12.5px;
}

.trouble-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.35fr;
  gap: 10px;
  padding: 10px 13px;
  color: #b9bed0;
  border-top: 1px solid var(--border);
}

.trouble-row:first-child { border-top: 0; }
.trouble-row:nth-child(even) { background: rgba(255, 255, 255, 0.02); }

.trouble-head {
  color: #8d93a9;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: rgba(255, 255, 255, 0.04);
}

.tutorial-note {
  margin: 22px 0 0;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #f0d9a8;
  border: 1px solid rgba(247, 200, 115, 0.24);
  border-radius: 12px;
  background: rgba(247, 200, 115, 0.07);
}

.tutorial-actions { margin-top: 30px; }

.method-card-wide { grid-column: span 2; }

.author-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.13), rgba(56, 189, 248, 0.06));
}

.author-title { margin: 0 0 8px; font-size: 14px; color: #e8eaf3; }

.author-desc {
  margin: 0 0 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: #b9bed0;
}

.author-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.author-tags li {
  padding: 3px 9px;
  font-size: 11px;
  color: #c9b3ff;
  border: 1px solid rgba(124, 92, 255, 0.3);
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.1);
}

.author-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
  padding-left: 18px;
  border-left: 1px solid var(--border);
}

.author-label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: #8d93a9;
}

.author-qq {
  margin: 0 0 6px;
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #e8eaf3;
  font-variant-numeric: tabular-nums;
}

.author-copy {
  width: 100%;
  padding: 9px 14px;
  font-size: 12.5px;
}

.author-open {
  align-self: center;
  margin-top: 2px;
  font-size: 12px;
  color: #9aa1b8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.author-open:hover { color: #e8eaf3; }

.tutorial-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
}

@media (max-width: 620px) {
  .site-header { padding: 18px 18px; }
  .site-nav a { padding: 7px 10px; font-size: 13px; }
  .hero { padding: 44px 20px 18px; }
  .download-section { padding: 34px 18px 28px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .platform-grid { grid-template-columns: 1fr; gap: 14px; }
  .platform-card { padding: 22px 20px 18px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; padding: 26px 18px 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; padding: 14px 18px 20px; }
  .qq-section { margin-top: 26px; padding: 0 18px; }
  .qq-inner { flex-direction: column; align-items: flex-start; padding: 24px 20px; gap: 20px; }
  .qq-actions { width: 100%; text-align: left; }
  .qq-buttons { justify-content: flex-start; }
  .qq-buttons .qq-btn { flex: 1; }
  .about-section { padding: 26px 18px 4px; }
  .about-points { grid-template-columns: 1fr; }
  .tutorial-page { padding: 32px 18px 44px; }
  .tutorial-download { width: 100%; min-width: 0; }
  .method-grid { grid-template-columns: 1fr; }
  .method-card-wide { grid-column: auto; }
  .author-card { grid-template-columns: 1fr; gap: 14px; padding: 18px; }
  .author-contact {
    align-items: flex-start;
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--border);
  }
  .author-open { align-self: flex-start; }
  .trouble-row { grid-template-columns: 0.9fr 0.9fr 1.2fr; gap: 8px; font-size: 11.5px; padding: 9px 11px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}