/* ==========================================================================
   GPT68 · Home
   首页专用样式:Hero、统计卡、CTA 区、首页底栏,以及响应式断点收尾。
   ========================================================================== */

/* ---------- 8. Hero ---------- */
.hero {
  padding: 80px 0 100px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.9fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line-2);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 28px;
  box-shadow: var(--shadow-xs);
}

.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.038em;
  color: var(--ink-1);
  margin-bottom: 24px;
}

.hero-title-em {
  background: linear-gradient(120deg,
    var(--blue-600) 0%,
    #8B5CF6 30%,
    #EC4899 50%,
    #8B5CF6 70%,
    var(--blue-600) 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradientShimmer 6s ease-in-out infinite;
  display: inline-block;
}

@keyframes gradientShimmer {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-title-em { animation: none; }
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--ink-3);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-lead strong {
  color: var(--ink-1);
  font-weight: 700;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.micro-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.micro-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line-2);
  font-size: 0.82rem;
  color: var(--ink-2);
  transition: background 180ms ease, border-color 180ms ease;
}

.micro-list li svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  color: var(--blue-600);
}

.micro-list li:hover {
  background: rgba(255, 255, 255, 1);
  border-color: var(--line-3);
}

/* ---------- 9. Hero stat card ---------- */
.hero-aside { position: relative; }

.stat-card {
  position: relative;
  padding: 30px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(ellipse 360px 200px at 100% 0%, rgba(59, 130, 246, 0.07) 0%, transparent 70%),
    rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line-2);
  box-shadow:
    0 30px 60px -20px rgba(15, 23, 42, 0.15),
    0 8px 16px -6px rgba(15, 23, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.stat-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.stat-card-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-2);
}

.stat-card-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #10B981;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
}

.pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: pulseDot 2s ease-in-out infinite;
}

/* hero 右上角 LIVE 指示灯 — 加上呼吸感，强化"实时"暗示 */
.stat-card-live .pulse {
  animation: pulseLive 1.6s ease-in-out infinite;
}

@keyframes pulseLive {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.20);
  }
  50% {
    transform: scale(1.15);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
}

.stat-hero {
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--line-2);
  margin-bottom: 24px;
}

.stat-figure {
  font-size: clamp(2.8rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.045em;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  background: linear-gradient(135deg, var(--ink-1) 0%, #1E293B 50%, var(--blue-700) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-figure-cap {
  font-size: 0.85rem;
  color: var(--ink-3);
  margin-top: 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 24px;
  margin-bottom: 24px;
}

.stat-cell-num {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink-1);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-cell-num small {
  font-size: 0.55em;
  font-weight: 600;
  color: var(--blue-600);
  margin-left: 3px;
  letter-spacing: 0;
}

.stat-cell-cap {
  font-size: 0.82rem;
  color: var(--ink-3);
  margin-top: 6px;
}

/* 套餐卡 → 品牌 hub 落地页的内链(仅首页) */
.plan-detail {
  display: block;
  text-align: center;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-1);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-2);
  transition: color .15s;
}
.plan-detail:hover { color: var(--blue-700); }

/* 首屏左侧:充值说明(替代原 micro-list) */
.hero-notes {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 22px;
  margin: 4px 0 0;
  padding: 0;
}
.hero-note {
  display: flex;
  gap: 11px;
  align-items: flex-start;
}
.hero-note-icon {
  flex: none;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--blue-50);
  color: var(--blue-700);
}
.hero-note-icon svg { width: 18px; height: 18px; }
.hero-note-body { display: flex; flex-direction: column; min-width: 0; }
.hero-note-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-1);
  line-height: 1.3;
}
.hero-note-text {
  font-size: 0.78rem;
  color: var(--ink-3);
  margin-top: 3px;
  line-height: 1.45;
}
@media (max-width: 560px) {
  .hero-notes { grid-template-columns: 1fr; gap: 12px; }
}

/* 首屏右卡:售后保障(替代原 stat-grid) */
.hero-guard {
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--line-2);
  margin-bottom: 24px;
}
.hero-guard-head {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-1);
  margin-bottom: 16px;
}
.hero-guard-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
}
.hero-guard-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--ink-2);
}
.hero-guard-list svg {
  width: 18px;
  height: 18px;
  flex: none;
  color: var(--blue-500);
}

.brand-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-2);
}

.brand-strip span,
.brand-strip a {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink-3);
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  background: var(--bg-tint);
}
.brand-strip a {
  transition: color .15s, background .15s;
}
.brand-strip a:hover {
  color: var(--blue-700);
  background: var(--blue-50);
}

/* ---------- 品牌入口导航(首页 → 各品牌 hub) ---------- */
.brand-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.brand-nav-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line-1);
  border-radius: var(--radius-md);
  background: #fff;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.brand-nav-card:hover {
  border-color: var(--blue-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.brand-nav-logo {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-tint);
  color: var(--ink-1);
  flex: none;
}
.brand-nav-logo svg { width: 20px; height: 20px; }
.brand-nav-name {
  flex: 1;
  min-width: 0;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink-1);
}
.brand-nav-arrow {
  color: var(--blue-700);
  font-weight: 700;
  transition: transform .15s;
}
.brand-nav-card:hover .brand-nav-arrow { transform: translateX(3px); }
@media (max-width: 768px) {
  .brand-nav { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 460px) {
  .brand-nav { grid-template-columns: 1fr; }
}

/* ---------- 14. CTA ---------- */
.section-cta { padding: 96px 0 120px; }

.cta-panel {
  position: relative;
  padding: 56px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(ellipse 600px 400px at 100% 0%, var(--grad-pink) 0%, transparent 60%),
    radial-gradient(ellipse 500px 350px at 0% 100%, var(--grad-blue) 0%, transparent 60%),
    radial-gradient(ellipse 400px 300px at 50% 50%, var(--grad-lavender) 0%, transparent 70%),
    var(--bg-card);
  background-size: 200% 200%, 200% 200%, 200% 200%, auto;
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  overflow: hidden;
  animation: ctaDrift 18s ease-in-out infinite alternate;
}

@keyframes ctaDrift {
  0%   { background-position: 0% 0%, 100% 100%, 50% 50%, 0 0; }
  100% { background-position: 30% 20%, 70% 80%, 60% 40%, 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cta-panel { animation: none; }
}

.cta-copy { position: relative; z-index: 1; }

.cta-title {
  font-size: clamp(2.2rem, 4.2vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink-1);
  margin: 14px 0 12px;
}

.cta-sub {
  font-size: 1rem;
  color: var(--ink-3);
  margin-bottom: 28px;
  max-width: 480px;
  line-height: 1.65;
}

.cta-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  position: relative;
}

.qr-frame {
  position: relative;
  width: 168px;
  height: 168px;
  padding: 10px;
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line-2);
}

/* 票据感虚线外圈 */
.qr-frame::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 16px;
  border: 1.5px dashed rgba(59, 130, 246, 0.35);
  pointer-events: none;
}

/* 右下角"微信"小角标 */
.qr-frame::after {
  content: "微信";
  position: absolute;
  bottom: -10px;
  right: -10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(135deg, #07C160, #06AD56);
  border-radius: 999px;
  box-shadow: 0 4px 10px -2px rgba(7, 193, 96, 0.45),
              0 0 0 2px #fff;
  white-space: nowrap;
}

.qr-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
}

.qr-cap {
  font-size: 0.88rem;
  color: var(--ink-3);
  text-align: center;
}

/* ---------- 15. Footer ---------- */
.footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--line-1);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  z-index: 1;
}

.footer-inner { display: flex; flex-direction: column; gap: 22px; }

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer .brand-mark { width: 24px; height: 24px; }
.footer .brand-name { font-size: 0.98rem; }

.copyright {
  font-size: 0.84rem;
  color: var(--ink-4);
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--ink-4);
  line-height: 1.65;
  padding-top: 20px;
  border-top: 1px dashed var(--line-1);
  max-width: 920px;
}

.disclaimer strong {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--blue-600);
  margin-right: 10px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--blue-50);
  text-transform: uppercase;
}

/* ---------- 17. Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-aside { max-width: 480px; }

  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .section-cta { padding: 72px 0 96px; }

  .hero { padding: 56px 0 72px; }

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

  .timeline { grid-template-columns: 1fr; }
  /* 单列布局下隐藏步骤之间的右侧箭头 */
  .step:not(:last-child)::after { display: none; }

  .cta-panel {
    grid-template-columns: 1fr;
    padding: 40px 32px;
    gap: 32px;
    text-align: center;
  }
  .cta-sub { margin-left: auto; margin-right: auto; }
  .cta-copy .actions { justify-content: center; }
  .cta-copy .section-num { margin-left: auto; margin-right: auto; }
  .cta-qr { margin: 0 auto; }
}

@media (max-width: 768px) {
  .shell { width: calc(100% - 32px); }

  /* 手机端:隐藏页内锚点导航,只保留「教程 / 博客」两个站点级入口 + 联系客服按钮 */
  .nav { gap: 4px; }
  .nav > a:not(.btn):not(.nav-key) { display: none; }
  .nav-indicator { display: none; }
  .nav-key { font-size: 0.9rem; padding: 8px 10px; }
  .nav .nav-cta { margin-left: 4px; }

  .topnote-label { display: none; }
  .topnote p { font-size: 0.78rem; }

  .cards-grid { grid-template-columns: 1fr; gap: 14px; }

  .actions { width: 100%; }
  .actions .btn { flex: 1; min-width: 0; }
}

@media (max-width: 480px) {
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }
  .cta-panel { padding: 32px 22px; }
  .stat-card { padding: 22px; }

  /* 顶栏空间紧张:窄屏「联系客服」按钮只留图标,底部 mobile-bar 仍有带字「客服」 */
  .nav-cta span { display: none; }
  .nav-cta { padding: 8px 11px !important; margin-left: 6px !important; }
  .nav-cta svg { width: 16px; height: 16px; }

  .actions { flex-direction: column; }
  .actions .btn { width: 100%; }

  .feature { padding: 22px; flex-direction: column; gap: 14px; }

  .footer-row { flex-direction: column; align-items: flex-start; gap: 14px; }
}



/* ==========================================================================
   v5 新增:把原内联 style 抽出
   ========================================================================== */

/* 教程跳转按钮 (flow 区) */
.flow-tutorial-cta {
  margin-top: 28px;
  text-align: center;
}
.flow-tutorial-cta .btn svg { vertical-align: -3px; margin-right: 6px; }
.flow-tutorial-hint {
  margin: 10px 0 0;
  font-size: 0.88rem;
  color: var(--ink-3);
}

/* 知识库卡片网格 */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.kb-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 22px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.kb-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-100);
}
.kb-card:hover h3 { color: var(--blue-600); }
.kb-card-tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--blue-600);
  background: var(--blue-50);
  border-radius: var(--radius-xs);
  padding: 3px 9px;
  margin-bottom: 12px;
}
.kb-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink-1);
  margin: 0 0 8px;
  line-height: 1.4;
  transition: color 0.2s;
}
.kb-card p {
  font-size: 0.9rem;
  color: var(--ink-3);
  margin: 0;
  line-height: 1.7;
}
.kb-more {
  margin-top: 22px;
  text-align: center;
}

/* ==========================================================================
   v5 新增:移动端固定底栏 safe-area 兜底
   原 styles.css 已有 .mobile-bar 样式,但 safe-area-inset-bottom 兼容性补强
   ========================================================================== */
.mobile-bar {
  padding-bottom: max(8px, var(--safe-bottom));
}