/* =========================================================================
   SevenToken · ChatGPT 一键安装 — 高端深色玻璃拟态主题
   Redesign v20260729-pro1
   ========================================================================= */

:root {
  color-scheme: dark;

  /* 背景与表面 */
  --bg-0: #05070d;
  --bg-1: #080b14;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.028);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --hairline: rgba(255, 255, 255, 0.10);
  --hairline-strong: rgba(255, 255, 255, 0.18);

  /* 文字 */
  --text: #eef2fb;
  --text-soft: #c3ccdd;
  --muted: #8792a8;
  --muted-2: #6b7688;

  /* 品牌色 */
  --emerald: #10b981;
  --emerald-2: #34d399;
  --teal: #14b8a6;
  --indigo: #6366f1;
  --violet: #8b5cf6;
  --sky: #38bdf8;
  --amber: #fbbf24;

  /* 渐变 */
  --grad-primary: linear-gradient(135deg, #10b981 0%, #14b8a6 55%, #38bdf8 100%);
  --grad-lanzou: linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #38bdf8 100%);
  --grad-text: linear-gradient(120deg, #34d399 0%, #38bdf8 55%, #818cf8 100%);

  /* 阴影 / 光晕 */
  --shadow-card: 0 24px 70px -28px rgba(0, 0, 0, 0.75);
  --shadow-float: 0 32px 90px -30px rgba(2, 6, 18, 0.9);
  --glow-emerald: 0 18px 46px -14px rgba(16, 185, 129, 0.55);
  --glow-indigo: 0 18px 46px -14px rgba(99, 102, 241, 0.55);

  --radius-xl: 26px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 11px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 700px at 15% -10%, #0d1424 0%, transparent 60%),
    radial-gradient(1100px 800px at 100% 0%, #0a1420 0%, transparent 55%),
    var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

button { font: inherit; }
a { color: inherit; }

/* ---------------------------------------------------------------- 极光背景 */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}

.blob-a {
  top: -12%;
  left: -8%;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.55), transparent 68%);
  animation: drift-a 22s ease-in-out infinite;
}

.blob-b {
  top: 8%;
  right: -12%;
  width: 44vw;
  height: 44vw;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.42), transparent 68%);
  animation: drift-b 26s ease-in-out infinite;
}

.blob-c {
  bottom: -18%;
  left: 30%;
  width: 42vw;
  height: 42vw;
  background: radial-gradient(circle, rgba(129, 140, 248, 0.40), transparent 68%);
  animation: drift-c 30s ease-in-out infinite;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 20%, #000 0%, transparent 75%);
}

@keyframes drift-a {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(6%, 8%) scale(1.12); }
}
@keyframes drift-b {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-7%, 6%) scale(1.15); }
}
@keyframes drift-c {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(4%, -7%) scale(1.1); }
}

/* ---------------------------------------------------------------- 布局壳 */
.shell {
  width: min(1140px, calc(100% - 34px));
  margin: 0 auto;
  padding: 46px 0 40px;
}

.installer {
  position: relative;
  padding: clamp(22px, 3.4vw, 46px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  box-shadow: var(--shadow-float);
}

/* 顶部细光带 */
.installer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: linear-gradient(90deg, transparent, rgba(52, 211, 153, 0.7), rgba(56, 189, 248, 0.7), transparent);
}

/* ---------------------------------------------------------------- 通用卡片 */
.card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.section-heading .card-kicker { margin-bottom: 8px; }

/* ---------------------------------------------------------------- 文字系统 */
.eyebrow,
.card-kicker,
.label {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--emerald-2);
}

.card-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--emerald-2);
}
.card-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-primary);
}
.card-kicker.on-dark { color: rgba(255, 255, 255, 0.85); }
.card-kicker.on-dark::before { background: rgba(255, 255, 255, 0.75); }

h1, h2 { margin: 0; letter-spacing: 0; }

h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.03;
  font-weight: 800;
  margin-top: 6px;
}

.grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  font-size: clamp(20px, 2.3vw, 28px);
  line-height: 1.22;
  font-weight: 750;
  margin-top: 6px;
  color: var(--text);
}

.card-copy {
  margin: 12px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 15px;
}

/* ---------------------------------------------------------------- 英雄区 */
.hero { margin-bottom: 26px; }

.hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-logo-ring {
  position: relative;
  display: inline-flex;
  padding: 3px;
  border-radius: 20px;
  background: linear-gradient(140deg, rgba(52, 211, 153, 0.9), rgba(56, 189, 248, 0.6), rgba(129, 140, 248, 0.8));
  box-shadow: var(--glow-emerald);
}

.brand-logo {
  width: 76px;
  height: 76px;
  border-radius: 17px;
  object-fit: cover;
  display: block;
  background: #0b0f18;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(52, 211, 153, 0.3);
  background: rgba(16, 185, 129, 0.10);
  color: var(--emerald-2);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald-2);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero-sub {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--text-soft);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
}

.feature-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
}

.feature-chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  background: var(--surface-2);
  color: var(--text-soft);
  font-size: 13.5px;
  font-weight: 650;
}

.feature-chips svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: var(--emerald-2);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------------------------------------------------------------- 系统检测行 */
.system-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  margin-bottom: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  background: var(--surface);
}

.system-detect .label {
  color: var(--muted);
  letter-spacing: 0.1em;
}

.system-row strong {
  display: block;
  margin-top: 5px;
  font-size: 19px;
  font-weight: 750;
  color: var(--text);
}

.segmented {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(96px, 1fr));
  padding: 4px;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  background: rgba(0, 0, 0, 0.28);
}

.segment {
  min-height: 42px;
  padding: 0 14px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 750;
  transition: color 0.2s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.segment:hover { color: var(--text-soft); }

.segment.active {
  color: #04140f;
  background: var(--grad-primary);
  box-shadow: 0 10px 22px -8px rgba(16, 185, 129, 0.7);
}

.segment:disabled { cursor: not-allowed; opacity: 0.5; }

/* ---------------------------------------------------------------- 教程区 */
.guide-section { margin-bottom: 20px; padding: 24px; }

.guide-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.guide-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.guide-step {
  position: relative;
  padding: 20px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  background: var(--surface-2);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.guide-step::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.guide-step:hover {
  transform: translateY(-4px);
  border-color: var(--hairline-strong);
  background: var(--surface-strong);
}
.guide-step:hover::after { transform: scaleX(1); }

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 34px;
  margin-bottom: 14px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.22), rgba(56, 189, 248, 0.18));
  border: 1px solid rgba(52, 211, 153, 0.28);
  color: var(--emerald-2);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.guide-step strong {
  display: block;
  font-size: 17px;
  font-weight: 750;
  color: var(--text);
}

.guide-step p {
  margin: 9px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 13.5px;
}

/* ---------------------------------------------------------------- Token 横幅 */
.token-banner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(99, 102, 241, 0.28);
  background:
    radial-gradient(120% 160% at 0% 0%, rgba(16, 185, 129, 0.28), transparent 55%),
    linear-gradient(120deg, #0c1b2e 0%, #0b1730 55%, #101433 100%);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.token-glow {
  position: absolute;
  right: -60px;
  top: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.35), transparent 65%);
  filter: blur(20px);
  pointer-events: none;
}

.token-copy { position: relative; z-index: 1; }
.token-banner h2 { color: #fff; margin-top: 8px; }
.token-banner p {
  margin: 10px 0 0;
  color: rgba(226, 232, 240, 0.82);
  line-height: 1.6;
  font-size: 15px;
}

.token-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 12px;
  background: #ffffff;
  color: #0b1220;
  font-weight: 850;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 14px 30px -10px rgba(0, 0, 0, 0.6);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.token-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -12px rgba(56, 189, 248, 0.55);
}
.token-link .i { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------------------------------------------------------- 下载区 */
.download-section { margin-bottom: 20px; padding: 24px; }
.download-head { margin-bottom: 20px; }
.download-head .card-copy { max-width: 720px; }

.route-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.route-option {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  background: var(--surface-2);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.route-option::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.6;
  pointer-events: none;
}
.route-official::before {
  background: radial-gradient(120% 90% at 100% 0%, rgba(16, 185, 129, 0.16), transparent 60%);
}
.route-lanzou::before {
  background: radial-gradient(120% 90% at 100% 0%, rgba(99, 102, 241, 0.18), transparent 60%);
}

.route-official { border-color: rgba(16, 185, 129, 0.26); }
.route-lanzou { border-color: rgba(99, 102, 241, 0.26); }

.route-option:hover {
  transform: translateY(-4px);
  border-color: var(--hairline-strong);
  box-shadow: var(--shadow-card);
}

.route-head { position: relative; z-index: 1; }

.route-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.route-title-row strong {
  color: var(--text);
  font-size: 22px;
  font-weight: 800;
}

.route-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.02em;
}
.route-official .route-badge {
  background: rgba(16, 185, 129, 0.16);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: var(--emerald-2);
}
.route-lanzou .route-badge {
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(129, 140, 248, 0.4);
  color: #a5b4fc;
}

.route-desc {
  margin: 12px 0 0;
  color: var(--text-soft);
  line-height: 1.6;
  font-size: 14px;
}

.package-meta {
  margin: 18px 0 0;
  padding-top: 15px;
  border-top: 1px dashed var(--hairline);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

/* ---------------------------------------------------------------- 按钮 */
.primary-action {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 56px;
  border: 0;
  border-radius: 13px;
  color: #04140f;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 850;
  font-size: 15.5px;
  letter-spacing: 0.01em;
  background: var(--grad-primary);
  background-size: 180% 180%;
  box-shadow: var(--glow-emerald);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background-position 0.6s ease, filter 0.2s ease;
}

/* 光泽扫过效果 */
.primary-action::after {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 45%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: skewX(-18deg);
  transition: left 0.6s ease;
}
.primary-action:hover:not(:disabled)::after { left: 130%; }

.primary-action:hover:not(:disabled) {
  transform: translateY(-2px);
  background-position: 100% 50%;
  box-shadow: 0 22px 52px -14px rgba(16, 185, 129, 0.7);
}
.primary-action:active:not(:disabled) { transform: translateY(0); }

.primary-action.secondary {
  background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  box-shadow: var(--glow-emerald);
}

.primary-action.lanzou-action,
.imagegen-download {
  background: var(--grad-lanzou);
  color: #f5f6ff;
  box-shadow: var(--glow-indigo);
}
.primary-action.lanzou-action:hover:not(:disabled),
.imagegen-download:hover:not(:disabled) {
  box-shadow: 0 22px 52px -14px rgba(99, 102, 241, 0.7);
}

.primary-action:disabled,
.segment:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  filter: grayscale(0.4);
  box-shadow: none;
}

.fallback-action {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.fallback-action:hover {
  background: var(--surface-strong);
  border-color: rgba(52, 211, 153, 0.4);
  color: var(--text);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid var(--hairline-strong);
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn-ghost:hover {
  background: var(--surface-strong);
  border-color: rgba(52, 211, 153, 0.4);
  transform: translateY(-2px);
}
.btn-ghost .i { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.button-icon { width: 22px; height: 22px; display: inline-flex; }
.button-icon svg {
  width: 22px; height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------------------------------------------------------------- 状态面板 */
.status-panel {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(56, 189, 248, 0.24);
  background: linear-gradient(120deg, rgba(56, 189, 248, 0.08), rgba(16, 185, 129, 0.05));
}

.status-dot {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  background: var(--amber);
  flex: 0 0 auto;
  margin-top: 6px;
  box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.6);
  animation: pulse-amber 2.4s infinite;
}
@keyframes pulse-amber {
  0% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(251, 191, 36, 0); }
  100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0); }
}

.status-copy { display: grid; gap: 10px; }
.status-panel p { margin: 0; color: var(--text-soft); line-height: 1.55; }

#statusText {
  color: var(--text);
  font-size: 16.5px;
  font-weight: 800;
}

.status-help { display: grid; gap: 8px; }
.status-help p {
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.6;
}

.status-help strong {
  display: inline-flex;
  min-width: 84px;
  justify-content: center;
  margin-right: 10px;
  padding: 3px 10px;
  border-radius: 8px;
  background: var(--grad-primary);
  color: #04140f;
  font-size: 13px;
  font-weight: 850;
}

/* ---------------------------------------------------------------- 增强功能网格 */
.addon-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.addon {
  display: grid;
  grid-template-columns: 1fr;
  align-content: space-between;
  gap: 20px;
  padding: 24px;
}

.zh-section { border-color: rgba(16, 185, 129, 0.24); }
.imagegen-section { border-color: rgba(99, 102, 241, 0.24); }

.zh-section {
  background:
    radial-gradient(120% 80% at 0% 0%, rgba(16, 185, 129, 0.12), transparent 55%),
    var(--surface);
}
.imagegen-section {
  background:
    radial-gradient(120% 80% at 0% 0%, rgba(99, 102, 241, 0.13), transparent 55%),
    var(--surface);
}

.imagegen-section .card-kicker { color: #a5b4fc; }
.imagegen-section .card-kicker::before { background: var(--grad-lanzou); }

.addon-copy .card-copy { margin-top: 12px; }
.zh-meta, .imagegen-meta { margin-top: 16px; }

.addon-actions {
  align-self: stretch;
  display: grid;
  gap: 11px;
}

/* ---------------------------------------------------------------- 售后区 */
.support-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  align-items: center;
  gap: 28px;
  padding: 28px;
}

.support-copy .card-copy { margin-top: 12px; max-width: 520px; }

.support-id {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding: 11px 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
}
.support-id span { color: var(--muted); font-size: 13px; font-weight: 700; }
.support-id strong {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--emerald-2);
}

.support-qr-wrap { justify-self: end; text-align: center; }

.support-qr {
  width: min(240px, 100%);
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: #fff;
  padding: 10px;
  box-shadow: 0 18px 44px -18px rgba(0, 0, 0, 0.8);
}
.support-qr-tip {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

/* ---------------------------------------------------------------- 页脚 */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--hairline);
  color: var(--muted-2);
  font-size: 13px;
}
.footer-dot { opacity: 0.5; }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 920px) {
  .guide-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 22px, 620px);
    padding: 26px 0 32px;
  }
  .installer { padding: 20px; border-radius: 22px; }

  .hero-top { flex-direction: column; gap: 16px; }
  .brand { gap: 16px; }
  .brand-logo, .brand-logo-ring img { width: 62px; height: 62px; }

  .system-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .segmented { grid-template-columns: repeat(2, 1fr); }

  .guide-head { flex-direction: column; align-items: stretch; gap: 14px; }
  .guide-download { width: 100%; justify-content: center; }
  .guide-steps { grid-template-columns: 1fr; }

  .token-banner {
    grid-template-columns: 1fr;
    padding: 22px;
  }
  .token-link { width: 100%; justify-content: center; }

  .route-grid { grid-template-columns: 1fr; }
  .route-option { padding: 20px; }

  .addon-grid { grid-template-columns: 1fr; }

  .support-section {
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: center;
  }
  .support-copy .card-copy { margin-left: auto; margin-right: auto; }
  .support-id { margin-left: auto; margin-right: auto; }
  .support-qr-wrap { justify-self: center; }
}

@media (max-width: 400px) {
  h1 { font-size: 30px; }
  .feature-chips li { font-size: 12.5px; padding: 8px 12px; }
}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .aurora-blob,
  .pulse-dot,
  .status-dot { animation: none !important; }
  * { transition-duration: 0.01ms !important; }
}