/* ========================================================
   快雷go机场 - 卡片便签风官方样式表
   色彩系统：
   - 柔和奶油黄底：#FCF8EE
   - 莫奈蓝：#4F759B
   - 贴纸浅绿：#D4E4BC
   - 深石板灰字：#2B2D42
   - 辅助便签粉：#FCE4EC
   - 辅助便签黄：#FEF9C3
   - 辅助便签青：#E0F2FE
   ======================================================== */

:root {
  --bg-cream: #FCF8EE;
  --color-blue: #4F759B;
  --color-blue-dark: #375573;
  --color-blue-light: #EBF3FA;
  --color-green: #D4E4BC;
  --color-green-dark: #7F9F58;
  --color-green-light: #F2F8EC;
  --color-slate: #2B2D42;
  --color-slate-light: #555870;
  --color-slate-lighter: #8D99AE;
  --note-pink: #FEE2E2;
  --note-pink-border: #FCA5A5;
  --note-yellow: #FEF08A;
  --note-yellow-border: #FDE047;
  --note-cyan: #E0F2FE;
  --note-cyan-border: #BAE6FD;
  --note-purple: #F3E8FF;
  --note-white: #FFFFFF;
  --tape-color: rgba(255, 255, 255, 0.78);
  --shadow-sm: 0 2px 6px rgba(43, 45, 66, 0.05);
  --shadow-md: 0 4px 16px rgba(43, 45, 66, 0.08), 0 1px 3px rgba(43, 45, 66, 0.04);
  --shadow-lg: 0 12px 28px rgba(43, 45, 66, 0.12), 0 3px 8px rgba(43, 45, 66, 0.06);
  --shadow-hover: 0 16px 36px rgba(79, 117, 155, 0.18), 0 6px 12px rgba(43, 45, 66, 0.08);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* 全局重置与基础 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-cream);
  color: var(--color-slate);
  font-family: var(--font-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 动态背景 Canvas 容器 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

.site-wrapper {
  position: relative;
  z-index: 1;
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.container-narrow {
  max-width: 960px;
}

/* 链接与排版通用 */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

/* 和纸胶带修饰效果 */
.tape-top {
  position: relative;
}
.tape-top::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-1deg);
  width: 84px;
  height: 24px;
  background: var(--tape-color);
  backdrop-filter: blur(3px);
  border-left: 2px dashed rgba(160, 160, 160, 0.45);
  border-right: 2px dashed rgba(160, 160, 160, 0.45);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
  z-index: 10;
  pointer-events: none;
}

.tape-top-left::before {
  left: 28px;
  transform: rotate(-3deg);
}

.tape-top-right::before {
  left: auto;
  right: 28px;
  transform: rotate(3deg);
}

/* 图钉 Pin 效果 */
.pin-top {
  position: relative;
}
.pin-top::after {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  background: radial-gradient(circle at 35% 35%, #FF7043, #D84315);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.25);
  z-index: 11;
  pointer-events: none;
}

/* 便签卡片通用基础类 */
.note-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-md);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.28s ease;
  position: relative;
  border: 1px solid rgba(43, 45, 66, 0.06);
}

.note-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.note-yellow { background-color: #FFFDF0; border-color: rgba(254, 240, 138, 0.6); }
.note-green { background-color: #F8FBF4; border-color: rgba(212, 228, 188, 0.7); }
.note-blue { background-color: #F4F8FC; border-color: rgba(79, 117, 155, 0.25); }
.note-pink { background-color: #FFF7F8; border-color: rgba(254, 226, 226, 0.7); }

/* 倾斜便签微错落感 */
.tilt-left-1 { transform: rotate(-1.2deg); }
.tilt-right-1 { transform: rotate(1.4deg); }
.tilt-left-2 { transform: rotate(-2deg); }
.tilt-right-2 { transform: rotate(2.2deg); }

.tilt-left-1:hover, .tilt-right-1:hover,
.tilt-left-2:hover, .tilt-right-2:hover {
  transform: translateY(-6px) rotate(0deg) scale(1.01);
}

/* 便签贴纸标签 Sticker Badge */
.sticker-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 6px;
  background: var(--color-green);
  color: var(--color-slate);
  box-shadow: 0 2px 4px rgba(0,0,0,0.06);
  transform: rotate(-1deg);
  border: 1px dashed rgba(43,45,66,0.18);
  width: fit-content;
}

.sticker-badge-blue {
  background: var(--color-blue);
  color: #FFFFFF;
}

.sticker-badge-yellow {
  background: #FDE047;
  color: var(--color-slate);
}

.sticker-badge-pink {
  background: #FBCFE8;
  color: #831843;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-align: center;
  position: relative;
}

.btn-primary {
  background-color: var(--color-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(79, 117, 155, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-blue-dark);
  box-shadow: 0 6px 20px rgba(79, 117, 155, 0.48);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-slate);
  border: 1.5px solid rgba(43, 45, 66, 0.15);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: #F8FAFC;
  border-color: var(--color-blue);
  color: var(--color-blue);
  transform: translateY(-2px);
}

.btn-green {
  background-color: var(--color-green);
  color: var(--color-slate);
  box-shadow: 0 4px 12px rgba(127, 159, 88, 0.25);
}

.btn-green:hover {
  background-color: #C5DC9F;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 17px;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

/* 顶部通告条 Notification Banner */
.top-banner {
  background: linear-gradient(90deg, #4F759B, #3B5B7E);
  color: #FFFFFF;
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 16px;
  text-align: center;
  position: relative;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.top-banner a.banner-link {
  color: #FFFDF0;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.18);
}

.top-banner a.banner-link:hover {
  background: rgba(255,255,255,0.3);
}

/* 导航栏 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(252, 248, 238, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(43, 45, 66, 0.08);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(43, 45, 66, 0.08);
  background: rgba(252, 248, 238, 0.98);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 800;
  color: var(--color-slate);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-blue);
  color: #FFFFFF;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 3px 8px rgba(79, 117, 155, 0.35);
  transform: rotate(-3deg);
}

.logo-badge {
  font-size: 11px;
  font-weight: 700;
  background: var(--color-green);
  color: var(--color-slate);
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  margin-left: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-slate-light);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  background-color: var(--color-blue);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--color-blue);
}

.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-slate);
  cursor: pointer;
  padding: 6px;
}

/* 章节通用标题 */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
  position: relative;
}

.section-tag {
  display: inline-block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-slate);
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-slate-light);
  line-height: 1.6;
}

/* ================= 1. 首屏 HERO 板块 ================= */
.hero-section {
  padding: 56px 0 72px;
  position: relative;
}

.hero-header {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 46px;
}

.hero-super-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  border: 1px solid rgba(79, 117, 155, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-blue);
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
  transform: rotate(-0.5deg);
}

.hero-title {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-slate);
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-title .highlight-blue {
  color: var(--color-blue);
  position: relative;
  display: inline-block;
}

.hero-title .highlight-blue::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 6px;
  width: 100%;
  height: 12px;
  background: rgba(212, 228, 188, 0.45);
  z-index: -1;
  border-radius: 4px;
  transform: rotate(-1deg);
}

.hero-desc {
  font-size: 19px;
  color: var(--color-slate-light);
  max-width: 720px;
  margin: 0 auto 32px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 13.5px;
  color: var(--color-slate-lighter);
  flex-wrap: wrap;
}

.hero-guarantee span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-slate-light);
}

/* 首屏错落有致便签卡片墙 */
.hero-notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.hero-note-item {
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  flex-direction: column;
}

.hero-note-item .note-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.hero-note-item h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-slate);
}

.hero-note-item p {
  font-size: 14.5px;
  color: var(--color-slate-light);
  line-height: 1.6;
}

.hero-note-item .note-tag {
  margin-top: 14px;
  align-self: flex-start;
}

/* ================= 2. 节点延迟和状态监控板块 ================= */
.status-section {
  padding: 72px 0;
  background: rgba(255, 255, 255, 0.45);
  border-top: 1px dashed rgba(43, 45, 66, 0.12);
  border-bottom: 1px dashed rgba(43, 45, 66, 0.12);
  position: relative;
}

.status-dashboard-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(43, 45, 66, 0.08);
}

.status-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(43, 45, 66, 0.08);
  flex-wrap: wrap;
  gap: 16px;
}

.status-summary {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: #16A34A;
  background: #DCFCE7;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.status-indicator-dot {
  width: 8px;
  height: 8px;
  background: #16A34A;
  border-radius: 50%;
  animation: pulse-dot 1.8s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(22, 163, 74, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.node-card {
  background: #FAFAFA;
  border: 1px solid rgba(43, 45, 66, 0.08);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: all 0.25s ease;
  position: relative;
}

.node-card:hover {
  background: #FFFFFF;
  border-color: var(--color-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

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

.node-flag {
  font-size: 22px;
}

.node-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--color-slate);
}

.node-type {
  font-size: 11px;
  color: var(--color-slate-lighter);
  background: #E5E7EB;
  padding: 2px 6px;
  border-radius: 4px;
}

.node-ping {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: #16A34A;
  background: #ECFDF5;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid #A7F3D0;
}

.node-ping.medium {
  color: #D97706;
  background: #FFFBEB;
  border-color: #FDE68A;
}

.node-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.node-badge-item {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--color-blue-light);
  color: var(--color-blue);
}

.node-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed rgba(43, 45, 66, 0.08);
  font-size: 12px;
  color: var(--color-slate-lighter);
}

/* ================= 3. 套餐价格与动态计价滑块板块 ================= */
.pricing-section {
  padding: 84px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
  margin-bottom: 56px;
}

.pricing-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-md);
  border: 1.5px solid rgba(43, 45, 66, 0.08);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  background: #FFFDF4;
  border-color: var(--color-blue);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-4px);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--color-blue);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(79, 117, 155, 0.35);
  letter-spacing: 0.5px;
}

.plan-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-slate);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 14px;
  color: var(--color-slate-light);
  min-height: 42px;
}

.plan-price-wrap {
  margin: 24px 0;
  padding-bottom: 24px;
  border-bottom: 1px dashed rgba(43, 45, 66, 0.12);
}

.plan-price {
  font-size: 44px;
  font-weight: 900;
  color: var(--color-slate);
  line-height: 1;
}

.plan-price .currency {
  font-size: 24px;
  font-weight: 700;
  vertical-align: super;
  margin-right: 2px;
}

.plan-price .period {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-slate-lighter);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features-list li {
  font-size: 14.5px;
  color: var(--color-slate);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features-list li .check-icon {
  color: #16A34A;
  font-weight: 700;
}

/* 家庭合租与年付车位动态计价滑块 */
.group-share-box {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 2px dashed rgba(79, 117, 155, 0.35);
  box-shadow: var(--shadow-md);
  margin-top: 40px;
  position: relative;
}

.group-share-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.slider-container {
  margin: 28px 0;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-slate-light);
  margin-top: 8px;
}

input[type="range"] {
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: #E2E8F0;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-blue);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(79, 117, 155, 0.5);
  border: 3px solid #FFFFFF;
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.share-calc-result {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: var(--color-blue-light);
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: center;
  margin-top: 24px;
}

.share-result-item .label {
  font-size: 12.5px;
  color: var(--color-slate-light);
  margin-bottom: 4px;
}

.share-result-item .value {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-blue);
}

/* ================= 4. 核心优势板块 ================= */
.advantages-section {
  padding: 72px 0;
  position: relative;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.adv-card {
  padding: 26px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(43, 45, 66, 0.08);
  position: relative;
  transition: all 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.adv-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.adv-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.adv-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 8px;
}

.adv-card p {
  font-size: 14px;
  color: var(--color-slate-light);
  line-height: 1.6;
}

/* ================= 5. 社群圈子与用户评价气泡墙 ================= */
.community-section {
  padding: 80px 0;
  background: rgba(212, 228, 188, 0.15);
  border-top: 1px dashed rgba(43, 45, 66, 0.1);
  border-bottom: 1px dashed rgba(43, 45, 66, 0.1);
}

.chat-bubble-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.chat-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(43, 45, 66, 0.06);
  position: relative;
}

.chat-user-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.chat-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-slate);
}

.chat-user-meta {
  flex-grow: 1;
}

.chat-user-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--color-slate);
}

.chat-user-status {
  font-size: 11.5px;
  color: var(--color-slate-lighter);
}

.chat-content {
  font-size: 14px;
  color: var(--color-slate);
  line-height: 1.6;
  background: #F8FAFC;
  padding: 12px 14px;
  border-radius: 10px;
  border-left: 3px solid var(--color-blue);
  margin-bottom: 12px;
}

.chat-speedtest-snap {
  background: #0F172A;
  color: #38BDF8;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 10px;
  border-radius: 6px;
  margin-top: 10px;
}

/* ================= 6. 常见问题 (FAQ) 板块 ================= */
.faq-section {
  padding: 80px 0;
}

.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px solid rgba(43, 45, 66, 0.08);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-question {
  padding: 20px 24px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-slate);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-icon-arrow {
  font-size: 18px;
  color: var(--color-blue);
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--color-slate-light);
  line-height: 1.7;
  border-top: 1px dashed rgba(43, 45, 66, 0.06);
  padding-top: 16px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ================= 7. 知识库与教程板块 ================= */
.kb-section {
  padding: 84px 0;
  background: rgba(255, 255, 255, 0.5);
  border-top: 1px dashed rgba(43, 45, 66, 0.1);
}

.kb-filter-tags {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-btn {
  background: #FFFFFF;
  border: 1px solid rgba(43, 45, 66, 0.12);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-slate-light);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn.active, .filter-btn:hover {
  background: var(--color-blue);
  color: #FFFFFF;
  border-color: var(--color-blue);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.kb-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(43, 45, 66, 0.08);
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
}

.kb-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-blue);
}

.kb-card-tag {
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  width: fit-content;
  margin-bottom: 12px;
}

.kb-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 10px;
  line-height: 1.4;
}

.kb-card-desc {
  font-size: 13.5px;
  color: var(--color-slate-light);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.kb-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-slate-lighter);
  padding-top: 14px;
  border-top: 1px dashed rgba(43, 45, 66, 0.08);
}

.kb-read-link {
  font-weight: 700;
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.kb-read-link:hover {
  text-decoration: underline;
}

/* ================= 8. 页脚 Footer ================= */
.site-footer {
  background: #252839;
  color: #CBD5E1;
  padding: 64px 0 32px;
  position: relative;
  border-top: 3px solid var(--color-blue);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-about {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.7;
  max-width: 340px;
}

.footer-col h5 {
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: #94A3B8;
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #64748B;
  flex-wrap: wrap;
  gap: 16px;
}

/* ================= 文章独立详情页排版 ================= */
.article-page {
  padding: 40px 0 80px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--color-slate-lighter);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--color-slate-light);
}

.breadcrumb-nav a:hover {
  color: var(--color-blue);
}

.article-container {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 36px;
  align-items: start;
}

.article-main-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(43, 45, 66, 0.08);
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(43, 45, 66, 0.08);
}

.article-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-slate);
  line-height: 1.35;
  margin: 12px 0 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13.5px;
  color: var(--color-slate-lighter);
  flex-wrap: wrap;
}

.article-content {
  font-size: 16px;
  color: #334155;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-slate);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-blue-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-slate);
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  background: #F8FAFC;
  border-left: 4px solid var(--color-blue);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--color-slate-light);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14.5px;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid #E2E8F0;
  text-align: left;
}

.article-content th {
  background: #F1F5F9;
  font-weight: 700;
  color: var(--color-slate);
}

.article-cta-box {
  background: linear-gradient(135deg, #FFFDF0 0%, #F4F8FC 100%);
  border: 2px dashed rgba(79, 117, 155, 0.4);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 90px;
}

.sidebar-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(43, 45, 66, 0.08);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(43, 45, 66, 0.1);
}

/* 响应式样式适配 */
@media (max-width: 1024px) {
  .hero-notes-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
  .pricing-card.featured { transform: none; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .chat-bubble-wall { grid-template-columns: repeat(2, 1fr); }
  .kb-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .article-container { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #FCF8EE;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    border-bottom: 1px solid rgba(43, 45, 66, 0.08);
    gap: 16px;
  }
  .nav-menu.active { display: flex; }
  .mobile-menu-btn { display: block; }
  .hero-title { font-size: 32px; }
  .hero-notes-grid { grid-template-columns: 1fr; }
  .chat-bubble-wall { grid-template-columns: 1fr; }
  .kb-grid { grid-template-columns: 1fr; }
  .share-calc-result { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .article-main-card { padding: 24px; }
}