/* ==========================================================================
   蓝帆云机场官网 - 全局轻量趣味主题样式 (Light & Playful Interactive Theme)
   域名: lanfanyunjic.homes
   ========================================================================== */

:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-bg: #eef2ff;
  --secondary: #06b6d4;
  --secondary-bg: #ecfeff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --success: #10b981;
  --success-bg: #dcfce7;
  --danger: #ef4444;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #c7d2fe;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 35px -10px rgba(79, 70, 229, 0.12), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 25px 45px -12px rgba(99, 102, 241, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(245, 158, 11, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.07) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(16, 185, 129, 0.06) 0px, transparent 50%);
  background-attachment: fixed;
}

/* 趣味动态背景装饰网格与光斑 */
.bg-decor-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.bg-grid-pattern {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: 36px 36px;
  background-image: 
    linear-gradient(to right, rgba(148, 163, 184, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.07) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.8) 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.8) 0%, transparent 80%);
}

.floating-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 380px;
  height: 380px;
  background: linear-gradient(135deg, #a5b4fc, #818cf8);
  top: -100px;
  left: -80px;
  animation-duration: 22s;
}

.orb-2 {
  width: 420px;
  height: 420px;
  background: linear-gradient(135deg, #a5f3fc, #67e8f9);
  top: 25%;
  right: -120px;
  animation-duration: 26s;
  animation-delay: -5s;
}

.orb-3 {
  width: 320px;
  height: 320px;
  background: linear-gradient(135deg, #fde68a, #fed7aa);
  bottom: 10%;
  left: 5%;
  animation-duration: 20s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, 50px) scale(0.95); }
}

/* 容器与通用排版 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* 按钮风格（高转化率+轻量趣味感） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 20px -4px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 14px 28px -4px rgba(79, 70, 229, 0.5);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(0) scale(0.99);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(
    60deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: shineBtn 4s infinite ease-in-out;
}

@keyframes shineBtn {
  0% { left: -60%; }
  30%, 100% { left: 140%; }
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--primary-bg);
  color: var(--primary);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 18px -4px rgba(245, 158, 11, 0.4);
}

.btn-accent:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 24px -4px rgba(245, 158, 11, 0.55);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.125rem;
  font-weight: 700;
}

/* 顶部吸顶导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.brand-logo .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
  animation: logoWiggle 6s ease-in-out infinite;
}

@keyframes logoWiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-4deg); }
  75% { transform: rotate(4deg); }
}

.brand-logo .logo-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--accent-light);
  color: #b45309;
  margin-left: 4px;
}

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

.nav-link {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-bg);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px;
}

/* HERO SECTION (英雄区) */
.hero-section {
  padding: 60px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid #e0e7ff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.08);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.badge-pulsing-dot {
  width: 9px;
  height: 9px;
  background-color: var(--success);
  border-radius: 50%;
  position: relative;
}

.badge-pulsing-dot::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.4);
  animation: pulseDot 1.8s infinite ease-out;
}

@keyframes pulseDot {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.2;
  font-weight: 850;
  letter-spacing: -1.2px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 50%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.18rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-action-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-features-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.feature-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.03);
}

.feature-chip span {
  font-size: 1rem;
}

/* 英雄区趣味交互卡片组件 (速度模拟与节点状态) */
.hero-visual-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  position: relative;
  transition: transform var(--transition-normal);
}

.hero-visual-card:hover {
  transform: translateY(-4px);
}

/* 浮动趣味标签 */
.floating-tag {
  position: absolute;
  background: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.09);
  border: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 2;
  animation: floatTag 6s ease-in-out infinite;
}

.tag-top-right {
  top: -18px;
  right: -15px;
  border-color: #c7d2fe;
  color: #4338ca;
}

.tag-bottom-left {
  bottom: -18px;
  left: -20px;
  border-color: #fed7aa;
  color: #c2410c;
  animation-delay: -3s;
}

@keyframes floatTag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.ping-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.ping-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.live-indicator {
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.8);
}

.ping-badge {
  background: var(--success-bg);
  color: #065f46;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.ping-meter-display {
  background: linear-gradient(145deg, #f8fafc, #edf2f7);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  border: 1px dashed #cbd5e1;
}

.ping-meter-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
}

.ping-meter-val {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  line-height: 1;
}

.ping-meter-val small {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 700;
  margin-left: 4px;
}

.ping-node-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ping-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.ping-node-item:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.node-flag {
  font-size: 1.25rem;
}

.node-speed {
  font-family: ui-monospace, monospace;
  font-weight: 700;
  color: var(--success);
}

/* 通用板块标题 (Section Titles) */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 核心优势板块 (Core Advantages) */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: #c7d2fe;
  box-shadow: var(--shadow-hover);
}

.card-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 22px;
  transition: transform var(--transition-fast);
}

.advantage-card:hover .card-icon-wrap {
  transform: scale(1.1) rotate(4deg);
}

.icon-purple { background: #ede9fe; color: #7c3aed; }
.icon-cyan { background: #cffafe; color: #0891b2; }
.icon-amber { background: #fef3c7; color: #d97706; }
.icon-green { background: #dcfce7; color: #059669; }
.icon-rose { background: #ffe4e6; color: #e11d48; }
.icon-blue { background: #dbeafe; color: #2563eb; }

.advantage-title {
  font-size: 1.25rem;
  font-weight: 750;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.advantage-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 套餐价格板块 (Pricing Section) */
.pricing-switch-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 45px;
}

.switch-label {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.switch-label.active {
  color: var(--primary);
}

.price-toggle {
  width: 54px;
  height: 30px;
  background: #cbd5e1;
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.price-toggle.yearly {
  background: var(--primary);
}

.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-normal);
}

.price-toggle.yearly .toggle-knob {
  transform: translateX(24px);
}

.discount-pill {
  background: #fee2e2;
  color: #b91c1c;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 15px 35px -5px rgba(79, 70, 229, 0.15);
  background: linear-gradient(180deg, #ffffff 0%, #fcfdff 100%);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  color: #fff;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.pricing-header {
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 22px;
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.plan-price-wrap {
  margin: 20px 0 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  font-family: ui-monospace, monospace;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-features {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.feature-item .check-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--success-bg);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

/* 用户评价板块 (User Reviews) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.review-stars {
  display: flex;
  gap: 3px;
  color: #f59e0b;
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #f1f5f9;
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e0e7ff 0%, #cffafe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.verified-tag {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--success-bg);
  color: #065f46;
}

/* 常见问题板块 (FAQ Section) */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.3s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 26px 24px;
}

.faq-answer a {
  color: var(--primary);
  text-decoration: underline;
  font-weight: 600;
}

/* 知识库与教程板块 (Knowledge Base & Articles) */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: #c7d2fe;
  box-shadow: var(--shadow-md);
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-category {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--primary-bg);
  color: var(--primary);
}

.article-readtime {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 750;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-card-title a {
  color: inherit;
}

.article-card-title a:hover {
  color: var(--primary);
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
  font-size: 0.85rem;
  font-weight: 600;
}

.article-more-link {
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
}

.article-more-link:hover {
  gap: 8px;
}

/* 转化引导Banner (CTA Banner) */
.cta-banner-section {
  padding: 40px 0 80px;
}

.cta-banner {
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 50%, #06b6d4 100%);
  border-radius: var(--radius-lg);
  padding: 60px 50px;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: 0 20px 40px -10px rgba(79, 70, 229, 0.4);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content h2 {
  font-size: 2.2rem;
  font-weight: 850;
  margin-bottom: 14px;
  color: #fff;
}

.cta-content p {
  font-size: 1.08rem;
  opacity: 0.92;
  max-width: 600px;
}

.cta-banner .btn {
  background: #ffffff;
  color: #4338ca !important;
  font-size: 1.15rem;
  padding: 16px 36px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.cta-banner .btn:hover {
  background: #f8fafc;
  transform: translateY(-3px) scale(1.03);
}

/* 底部区域 (Footer) */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: 50px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 45px;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 750;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 3px;
}

.footer-bottom {
  border-top: 1px solid #f1f5f9;
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.footer-bottom-links a {
  color: var(--text-muted);
}

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

/* 移动端悬浮直达按钮 */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  z-index: 999;
}

.mobile-sticky-cta .btn {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.45);
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-desc {
    margin: 0 auto 32px;
  }
  .hero-action-group, .hero-features-chips {
    justify-content: center;
  }
  .advantages-grid, .pricing-grid, .reviews-grid, .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-banner {
    flex-direction: column;
    text-align: center;
    padding: 45px 30px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta .btn-secondary {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    padding: 20px 24px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
    gap: 12px;
  }
  .hero-title {
    font-size: 2.35rem;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .advantages-grid, .pricing-grid, .reviews-grid, .knowledge-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .mobile-sticky-cta {
    display: block;
  }
  body {
    padding-bottom: 70px;
  }
}