/* =========================================================================
   鱼哥 giffgaff · 设计系统 v2
   深靛蓝 + 暖珊瑚 + 暖米白底
   移动端优先 → 平板 → 电脑端 渐进增强
   ========================================================================= */

:root {
  color-scheme: light;

  /* 调色板：暖米白 + 深靛蓝 + 暖珊瑚 */
  --bg: #faf6ee;
  --bg-2: #f0e9dc;
  --paper: #ffffff;
  --paper-2: #fdf8f0;
  --soft: #ffefe0;
  --soft-2: #fff7eb;
  --ink: #1a1530;
  --ink-2: #2d2647;
  --muted: #6b5f7d;
  --line: #e8dfd0;
  --line-2: #d9cdb8;

  --primary: #4338ca;       /* indigo-700 */
  --primary-2: #6366f1;     /* indigo-500 */
  --primary-3: #818cf8;     /* indigo-400 */
  --primary-dark: #3730a3;
  --primary-deep: #1e1b4b;  /* indigo-950 */
  --primary-glow: rgba(67, 56, 202, 0.45);

  --accent: #ea580c;        /* orange-600 */
  --accent-2: #fb923c;      /* orange-400 */
  --accent-3: #f59e0b;      /* amber-500 */
  --accent-glow: rgba(234, 88, 12, 0.35);

  --grad-1: linear-gradient(145deg, #4338ca 0%, #1e1b4b 100%);
  --grad-2: linear-gradient(135deg, #4338ca 0%, #ea580c 100%);
  --grad-3: linear-gradient(180deg, rgba(67, 56, 202, 0.08), transparent 360px);
  --grad-4: linear-gradient(135deg, #fb923c 0%, #ea580c 100%);

  --shadow-sm: 0 4px 18px rgba(30, 27, 75, 0.08);
  --shadow:    0 18px 54px rgba(30, 27, 75, 0.16);
  --shadow-lg: 0 28px 80px rgba(30, 27, 75, 0.24);
  --shadow-warm: 0 18px 48px rgba(234, 88, 12, 0.18);

  --radius: 18px;
  --radius-lg: 22px;
  --radius-sm: 12px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { box-sizing: border-box; }
*:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.4);
  outline-offset: 3px;
  border-radius: 6px;
}

html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; }
img { max-width: 100%; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--primary-2), var(--primary-deep));
  border-radius: 8px;
}

/* =========================================================================
   布局
   ========================================================================= */
.app-shell {
  width: min(100%, 430px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px 14px 36px;
  position: relative;
}

/* 背景氛围：浮动光斑 */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(600px 400px at 12% 8%, rgba(99, 102, 241, 0.18), transparent 60%),
    radial-gradient(700px 500px at 88% 90%, rgba(251, 146, 60, 0.14), transparent 60%),
    var(--grad-3),
    var(--bg);
  animation: aurora-shift 18s ease-in-out infinite alternate;
}

@keyframes aurora-shift {
  0%   { background-position: 0% 0%, 100% 100%, 0 0, 0 0; }
  100% { background-position: 30% 20%, 70% 80%, 0 0, 0 0; }
}

/* 顶部进度条 */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary-2), var(--accent-2));
  z-index: 100;
  box-shadow: 0 0 12px var(--primary-glow);
  transition: width 0.1s linear;
}

/* =========================================================================
   通用组件
   ========================================================================= */
.topbar { padding: 6px 0 14px; }

.seller {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 850;
  text-decoration: none;
  transition: transform 0.4s var(--ease);
}
.seller:hover { transform: translateX(2px); }

.avatar-ring {
  position: relative;
  width: 46px;
  height: 46px;
  flex-shrink: 0;
}
.avatar-ring::before {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--primary), var(--accent-2), var(--primary));
  animation: logo-spin 6s linear infinite;
  z-index: 0;
  filter: drop-shadow(0 0 4px rgba(234, 88, 12, 0.35));
}
.avatar-ring img {
  position: relative;
  width: 100%;
  height: 100%;
  border: 2px solid #fff;
  border-radius: 50%;
  object-fit: cover;
  z-index: 1;
  animation: logo-spin 8s linear infinite;
  will-change: transform;
}

@keyframes logo-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .avatar-ring::before,
  .avatar-ring img { animation: none; }
}

/* 卡片基础 */
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition:
    transform 0.5s var(--ease),
    box-shadow 0.5s var(--ease),
    border-color 0.4s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.35);
}

/* 小标签 */
.kicker,
.section-title p,
.tag,
.benefits span,
.steps span {
  margin: 0;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

/* =========================================================================
   Hero
   ========================================================================= */
.hero-card {
  position: relative;
  padding: 28px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(99, 102, 241, 0.10), transparent 60%),
    radial-gradient(80% 60% at 0% 100%, rgba(251, 146, 60, 0.08), transparent 60%),
    rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  overflow: hidden;
  isolation: isolate;
}
.hero-card::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22), transparent 70%);
  z-index: -1;
  animation: pulse-glow 5s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50%      { transform: scale(1.15); opacity: 1; }
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--soft);
  color: var(--accent);
  border-radius: 999px;
}
.kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: dot-blink 1.6s ease-in-out infinite;
}
@keyframes dot-blink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.7); }
}

h1 {
  margin: 14px 0 12px;
  font-size: clamp(2rem, 8vw, 2.6rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  font-weight: 900;
}
h1 .accent {
  background: var(--grad-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-text {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-badges span {
  flex: 1 1 auto;
  min-width: 92px;
  padding: 8px 10px;
  border: 1px solid rgba(67, 56, 202, 0.22);
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--paper-2);
  font-size: 0.82rem;
  font-weight: 850;
  text-align: center;
  transition: all 0.3s var(--ease);
}
.hero-badges span:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--primary-glow);
}

/* =========================================================================
   Section title
   ========================================================================= */
.section-title {
  grid-column: 1 / -1;
}
.section-title p {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.section-title p::before,
.section-title p::after {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--primary);
}
.section-title p::after { display: none; }

.section-title h2 {
  margin: 6px 0 0;
  font-size: 1.7rem;
  line-height: 1.16;
  font-weight: 900;
}
.section-title.light p,
.section-title.light h2 { color: #fff; }
.section-title.light p::before { background: var(--accent-2); }

/* =========================================================================
   价格面板
   ========================================================================= */
.price-panel {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.price-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-2);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s var(--ease);
  will-change: transform;
}
.price-item:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.price-item::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.6) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.8s var(--ease);
  pointer-events: none;
}
.price-item:hover::after { transform: translateX(100%); }

.price-item:hover {
  transform: translateY(-3px) scale(1.01);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.price-item.primary {
  border-color: rgba(67, 56, 202, 0.4);
  background: linear-gradient(135deg, #ede9fe 0%, #fef3e8 100%);
}
.price-item.primary::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, var(--primary), var(--accent-2), var(--primary));
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0.7;
  animation: border-flow 4s linear infinite;
  pointer-events: none;
}
@keyframes border-flow {
  to { background-position: 200% 0; }
}

.price-item h3 { margin: 4px 0 4px; font-size: 1.15rem; }
.price-item p:not(.tag) {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.price-item strong {
  color: var(--ink);
  font-size: 2.2rem;
  line-height: 1;
  white-space: nowrap;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}
.price-item .price-anim {
  display: inline-block;
  transition: transform 0.4s var(--ease-bounce);
}
.price-item:hover .price-anim { transform: scale(1.08); }

/* =========================================================================
   优势列表
   ========================================================================= */
.benefits {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}
.benefits article {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease);
}
.benefits article:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
  border-color: rgba(99, 102, 241, 0.3);
}
.benefits span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  color: #fff;
  background: var(--grad-1);
  font-size: 0.95rem;
  font-weight: 900;
  font-feature-settings: "tnum";
  letter-spacing: 0.02em;
  box-shadow: 0 6px 20px var(--primary-glow);
  transition: transform 0.5s var(--ease-bounce);
}
.benefits article:hover span { transform: rotate(-8deg) scale(1.06); }

.benefits .body {
  display: grid;
  gap: 6px;
  min-width: 0;
}
.benefits h2 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.3;
  font-weight: 800;
}
.benefits p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* =========================================================================
   新手指南 · 拿到手该做什么（三阶段）
   ========================================================================= */
.onboarding {
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}
.onboarding-phases {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: phase;
}
.onboarding .phase {
  position: relative;
  padding: 16px 16px 16px 64px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-2);
  transition: all 0.4s var(--ease);
}
.onboarding .phase:hover {
  border-color: rgba(99, 102, 241, 0.35);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transform: translateX(2px);
}
.onboarding .phase::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 2px;
  background: var(--grad-2);
  opacity: 0.85;
}
.onboarding .phase-num {
  position: absolute;
  left: 12px;
  top: 14px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-left: 12px;
  border-radius: 50%;
  color: #fff;
  background: var(--grad-1);
  font-size: 0.95rem;
  font-weight: 900;
  box-shadow: 0 4px 12px var(--primary-glow);
}
.onboarding .phase-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.onboarding .phase-head h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink);
}
.onboarding .phase ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.7;
}
.onboarding .phase li {
  margin-bottom: 4px;
}
.onboarding .phase li strong { color: var(--ink); }
.onboarding .phase code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--soft);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  font-weight: 700;
}
.onboarding .phase a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}
.onboarding .phase a:hover {
  color: var(--accent);
  border-bottom-style: solid;
}
@media (min-width: 640px) {
  .onboarding-phases { grid-template-columns: 1fr 1fr 1fr; }
  .onboarding .phase { padding: 16px 14px 16px 56px; }
  .onboarding .phase-num { left: 8px; margin-left: 8px; }
  .onboarding .phase::before { left: 12px; }
}

/* =========================================================================
   下单区
   ========================================================================= */
.order-box {
  margin-top: 14px;
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  color: #fff;
  background: var(--grad-1);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.order-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(400px 200px at 100% 0%, rgba(251, 146, 60, 0.32), transparent 60%),
    radial-gradient(300px 200px at 0% 100%, rgba(129, 140, 248, 0.4), transparent 60%);
  z-index: -1;
  animation: aurora-shift 12s ease-in-out infinite alternate;
}
.order-box::after {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  animation: shimmer 5s linear infinite;
  pointer-events: none;
}
@keyframes shimmer {
  to { left: 100%; }
}

.qr-card {
  display: grid;
  justify-items: center;
  gap: 10px;
  margin: 16px 0;
  padding: 18px;
  border-radius: 16px;
  color: var(--ink);
  background: #fff;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}
.qr-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent 48%, rgba(67, 56, 202, 0.06) 50%, transparent 52%);
  background-size: 16px 16px;
  pointer-events: none;
}
.qr-image {
  display: block;
  width: 180px;
  height: 180px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  position: relative;
  z-index: 1;
  transition: transform 0.4s var(--ease-bounce);
}
.qr-card:hover .qr-image { transform: scale(1.04) rotate(-2deg); }
.qr-card p { margin: 0; font-size: 0.9rem; font-weight: 600; }
.qr-card .qr-placeholder {
  width: 180px;
  height: 180px;
  display: grid;
  place-items: center;
  border: 2px dashed var(--primary);
  border-radius: 12px;
  color: var(--primary-dark);
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  padding: 12px;
}

.buy-button {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 14px;
  color: var(--primary-deep);
  background: #fff;
  font-weight: 900;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.buy-button::after {
  content: "→";
  font-size: 1.2rem;
  transition: transform 0.3s var(--ease);
}
.buy-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}
.buy-button:hover::after { transform: translateX(4px); }

.buy-button.disabled {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.7);
  cursor: not-allowed;
  box-shadow: none;
}
.buy-button.disabled::after { content: ""; }
.buy-button.disabled:hover { transform: none; }

/* 次级按钮：透明背景 + 白边，用于和主按钮（白底）做对比 */
.buy-button.outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.85);
  box-shadow: none;
}
.buy-button.outline::after { color: #fff; }
.buy-button.outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

/* 渠道之间的"或"分隔线 */
.order-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 14px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.order-divider::before,
.order-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

.link-text {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.82);
  overflow-wrap: anywhere;
  text-align: center;
  font-size: 0.85rem;
}

/* =========================================================================
   联系
   ========================================================================= */
.contact-box {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.contact-list {
  display: grid;
  gap: 10px;
}
.contact-list a,
.contact-list button {
  position: relative;
  display: flex;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--ink);
  background: var(--paper-2);
  font: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: all 0.4s var(--ease);
}
.contact-list a::before,
.contact-list button::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--grad-1);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.3s var(--ease);
}
.contact-list a:hover,
.contact-list button:hover {
  background: #fff;
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.contact-list a:hover::before,
.contact-list button:hover::before {
  transform: scaleY(1);
}
.contact-list .icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--soft);
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 800;
  transition: all 0.3s var(--ease);
}
.contact-list a:hover .icon,
.contact-list button:hover .icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.08) rotate(-6deg);
}
.contact-list .label { display: flex; align-items: center; gap: 12px; min-width: 0; }
.contact-list .label span:not(.icon) {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 800;
}
.contact-list .arrow {
  color: var(--primary);
  font-size: 1.4rem;
  line-height: 1;
  transition: transform 0.3s var(--ease);
}
.contact-list a:hover .arrow,
.contact-list button:hover .arrow {
  transform: translateX(4px);
}

.contact-list .placeholder {
  opacity: 0.7;
  cursor: default;
}
.contact-list .placeholder:hover {
  transform: none;
  background: var(--paper-2);
  border-color: var(--line);
  box-shadow: none;
}
.contact-list .placeholder::before { display: none; }
.contact-list .placeholder .label span:not(.icon) {
  color: var(--muted);
  font-weight: 600;
  font-style: italic;
}
.contact-list .placeholder .icon {
  background: var(--bg-2);
  color: var(--muted);
}

/* =========================================================================
   FAQ
   ========================================================================= */
.faq {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}
.faq details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-2);
  overflow: hidden;
  transition: all 0.35s var(--ease);
}
.faq details:hover {
  border-color: rgba(99, 102, 241, 0.3);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.faq details[open] {
  background: #fff;
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: 0 6px 22px rgba(67, 56, 202, 0.10);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: var(--ink);
  font-size: 0.98rem;
  position: relative;
  user-select: none;
  transition: color 0.2s ease;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "Q";
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--grad-1);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 900;
  box-shadow: 0 4px 10px var(--primary-glow);
}
.faq summary:hover { color: var(--primary); }
.faq summary::after {
  content: "+";
  margin-left: auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--soft);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.35s var(--ease-bounce), background 0.2s ease;
}
.faq details[open] summary::after {
  transform: rotate(135deg);
  background: var(--primary);
  color: #fff;
}
.faq .answer {
  padding: 0 18px 16px 58px;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq .answer p { margin: 0 0 8px; }
.faq .answer p:last-child { margin-bottom: 0; }
.faq .answer code {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  font-weight: 700;
}
.faq .answer ol,
.faq .answer ul {
  margin: 6px 0 8px;
  padding-left: 20px;
}
.faq .answer li { margin-bottom: 4px; }
.faq .answer a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
  transition: color 0.2s ease;
}
.faq .answer a:hover { color: var(--accent); border-bottom-style: solid; }
.faq .answer strong { color: var(--ink); }

/* 高亮链接（推荐/affiliate） */
.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  padding: 3px 9px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff !important;
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none !important;
  border: 0 !important;
  box-shadow: 0 4px 12px var(--primary-glow);
  transition: transform 0.3s var(--ease-bounce), box-shadow 0.2s ease;
}
.cta-link::after {
  content: "↗";
  font-size: 0.9em;
  transition: transform 0.3s var(--ease);
}
.cta-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px var(--primary-glow);
  color: #fff !important;
}
.cta-link:hover::after { transform: translate(2px, -2px); }

/* 价格卡片内的自助激活入口 */
.price-item .self-activate {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
  padding-bottom: 1px;
  transition: color 0.2s ease;
}
.price-item .self-activate:hover {
  color: var(--accent);
  border-bottom-style: solid;
}

/* =========================================================================
   教程链接
   ========================================================================= */
.guide-links {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}
.guide-links a {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--ink);
  background: var(--paper-2);
  font-weight: 800;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: all 0.4s var(--ease);
}
.guide-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--grad-2);
  transition: width 0.4s var(--ease);
}
.guide-links a:hover {
  background: #fff;
  transform: translateX(4px);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: var(--shadow-sm);
}
.guide-links a:hover::after { width: 100%; }
.guide-links a .arrow {
  color: var(--primary);
  font-size: 1.2rem;
  transition: transform 0.3s var(--ease);
}
.guide-links a:hover .arrow { transform: translateX(4px); }
.guide-links a strong { color: var(--primary); font-size: 0.9rem; }

/* =========================================================================
   教程步骤
   ========================================================================= */
.tutorial-steps {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}
.tutorial-steps article {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease);
}
.tutorial-steps article:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.tutorial-steps article > span {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  color: #fff;
  background: var(--grad-1);
  font-size: 0.95rem;
  font-weight: 900;
  box-shadow: 0 6px 16px var(--primary-glow);
}
.tutorial-steps .body { display: grid; gap: 10px; min-width: 0; }
.tutorial-steps p { margin: 0; }
.tutorial-steps a {
  color: var(--primary);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
  transition: all 0.2s ease;
}
.tutorial-steps a:hover { color: var(--accent); border-bottom-style: solid; }

.copy-text {
  display: block;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink) !important;
  background: var(--soft-2);
  font-size: 0.9rem !important;
  font: inherit;
  line-height: 1.6;
  text-align: left;
  cursor: copy;
  transition: all 0.3s var(--ease);
}
.copy-text:hover {
  background: #fff;
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.copy-tip {
  color: var(--accent) !important;
  font-weight: 800;
  min-height: 1.4em;
  transition: opacity 0.3s ease;
}

.step-image {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  cursor: zoom-in;
  transition: all 0.4s var(--ease);
}
.step-image:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow);
}

/* =========================================================================
   页脚
   ========================================================================= */
.site-footer {
  padding: 24px 6px 0;
  text-align: center;
}
.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* =========================================================================
   弹窗
   ========================================================================= */
.image-preview {
  width: min(100vw - 24px, 960px);
  max-height: calc(100vh - 24px);
  padding: 42px 12px 12px;
  border: 0;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}
.image-preview::backdrop { background: rgba(15, 13, 35, 0.78); }
.image-preview img {
  display: block;
  width: 100%;
  max-height: calc(100vh - 92px);
  object-fit: contain;
}

.preview-close {
  position: absolute;
  top: 8px;
  right: 10px;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--primary);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.3s var(--ease-bounce);
}
.preview-close:hover { transform: rotate(90deg) scale(1.1); }

.wechat-preview {
  width: min(100vw - 32px, 360px);
  padding: 44px 18px 18px;
  border: 0;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}
.wechat-preview::backdrop { background: rgba(15, 13, 35, 0.78); }
.wechat-preview img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.wechat-preview p {
  margin: 12px 0 0;
  color: var(--primary);
  font-weight: 850;
  text-align: center;
}

/* 微信按钮：与链接同款，但用 button 元素 */
.contact-list .wechat-trigger {
  cursor: pointer;
  font: inherit;
  width: 100%;
  text-align: left;
}
.contact-list .icon.wechat-icon {
  background: linear-gradient(135deg, #07c160 0%, #10b981 100%);
  color: #fff;
}
.contact-list a:hover .icon.wechat-icon,
.contact-list .wechat-trigger:hover .icon.wechat-icon {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
}
.contact-hint {
  margin: 8px 4px 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}
.contact-hint code {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  font-weight: 700;
}

/* =========================================================================
   动效 · 滚动入场
   ========================================================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-stagger.in > * {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 0.10s; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 0.20s; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 0.30s; }
.reveal-stagger.in > *:nth-child(7) { transition-delay: 0.35s; }
.reveal-stagger.in > *:nth-child(8) { transition-delay: 0.40s; }
.reveal-stagger.in > *:nth-child(9) { transition-delay: 0.45s; }
.reveal-stagger.in > *:nth-child(10) { transition-delay: 0.50s; }
.reveal-stagger.in > *:nth-child(n+11) { transition-delay: 0.55s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-stagger > * { opacity: 1; transform: none; }
}

/* =========================================================================
   响应式 · 平板
   ========================================================================= */
@media (min-width: 640px) {
  .app-shell { width: min(100%, 560px); padding: 20px 18px 48px; }
  .hero-card { padding: 32px 28px 26px; }
  h1 { font-size: 2.6rem; }
  .benefits, .tutorial-steps { grid-template-columns: 1fr 1fr; }
  .benefits article, .tutorial-steps article { grid-template-columns: 56px 1fr; }
  .guide-links { grid-template-columns: 1fr 1fr; }
  .contact-list { grid-template-columns: 1fr 1fr; }
}

/* =========================================================================
   响应式 · 电脑端
   ========================================================================= */
@media (min-width: 1024px) {
  body { background: var(--bg); }
  .app-shell {
    width: min(100%, 1180px);
    padding: 32px 32px 64px;
  }

  /* 顶部 */
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 4px 24px;
  }
  .topbar .seller { font-size: 1rem; }
  .topbar .nav {
    display: flex;
    gap: 8px;
  }
  .topbar .nav a {
    padding: 8px 16px;
    border-radius: 999px;
    color: var(--ink-2);
    font-size: 0.9rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s var(--ease);
  }
  .topbar .nav a:hover {
    background: var(--paper-2);
    color: var(--primary);
  }

  /* 主体 grid：主列 + 侧栏 */
  .desktop-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 28px;
    align-items: start;
  }
  .desktop-grid > .col-left,
  .desktop-grid > .col-right {
    display: grid;
    gap: 16px;
  }

  /* Hero 加大 */
  .hero-card {
    padding: 48px 40px 36px;
  }
  h1 { font-size: clamp(2.4rem, 4vw, 3.4rem); }
  .hero-text { font-size: 1.08rem; max-width: 56ch; }
  .hero-badges span { font-size: 0.9rem; padding: 10px 14px; }

  /* 价格面板：两列，已激活卡跨满整行 */
  .price-panel {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .price-item.primary {
    grid-column: 1 / -1;
  }

  /* 优势 2x3 */
  .benefits {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  /* 教程链接：2 列 */
  .guide-links {
    grid-template-columns: 1fr 1fr;
  }

  /* 步骤页 - 2 列 */
  .tutorial-steps {
    grid-template-columns: 1fr 1fr;
  }

  /* 侧栏：联系 + 下单叠放 */
  .col-right {
    position: sticky;
    top: 24px;
  }
  .col-right .order-box { margin-top: 0; }
}

@media (min-width: 1280px) {
  .app-shell { padding: 40px 32px 80px; }
  .desktop-grid { grid-template-columns: minmax(0, 1fr) 420px; gap: 36px; }
  h1 { font-size: 3.6rem; }
}

/* 超大屏 */
@media (min-width: 1600px) {
  .app-shell { width: min(100%, 1320px); }
}

/* =========================================================================
   工具
   ========================================================================= */
.no-mobile { display: none; }
@media (min-width: 1024px) {
  .no-mobile { display: initial; }
  .mobile-only { display: none; }
}

/* 浮动小按钮 */
.floating-actions {
  position: fixed;
  right: 16px;
  bottom: 16px;
  display: none;
  flex-direction: column;
  gap: 10px;
  z-index: 50;
}
@media (min-width: 1024px) {
  .floating-actions { display: flex; }
}
.floating-actions a {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  box-shadow: var(--shadow);
  transition: all 0.3s var(--ease-bounce);
}
.floating-actions a:hover {
  transform: scale(1.1) rotate(-6deg);
  background: var(--primary-2);
  box-shadow: var(--shadow-lg);
}
.floating-actions .fab-tg { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); }
.floating-actions .fab-tg:hover { background: linear-gradient(135deg, #8b5cf6 0%, #ea580c 100%); }
.floating-actions .fab-top {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  border: 1px solid var(--line);
}

/* =========================================================================
   副页专用：付款指南卡 + 速查表 + FAQ 更多链接
   ========================================================================= */
.faq-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  padding: 12px 18px;
  border-radius: 12px;
  background: var(--grad-1);
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 6px 18px var(--primary-glow);
  transition: all 0.3s var(--ease);
}
.faq-more:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px var(--primary-glow);
}

.payment-guide {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}
.pay-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease);
}
.pay-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow);
  transform: translateX(2px);
}
.pay-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pay-card h3::before {
  content: "▸";
  color: var(--accent);
  font-size: 1.2rem;
}
.pay-card.warn {
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.06) 0%, rgba(251, 146, 60, 0.04) 100%), #fff;
  border-color: rgba(234, 88, 12, 0.25);
}
.pay-card.warn h3::before {
  content: "⚠";
  color: var(--accent);
}
.pay-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.7;
}
.pay-card li { margin-bottom: 4px; }
.pay-card li strong { color: var(--ink); }
.pay-card code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--soft);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  font-weight: 700;
}

.cheatsheet {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.cs-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}
.cs-row:last-child { border-bottom: none; }
.cs-row:hover { background: var(--paper-2); }
.cs-label {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.cs-code {
  font-size: 1rem;
  color: var(--ink);
}
.cs-code code {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.95em;
  font-weight: 700;
}
.cs-alt {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}
.cs-alt a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}

@media (min-width: 640px) {
  .payment-guide { grid-template-columns: 1fr 1fr 1fr; }
  .cheatsheet .cs-row {
    grid-template-columns: 160px 1fr 1fr;
    align-items: center;
    gap: 14px;
  }
  .cs-label { font-size: 0.85rem; }
}