/* ==========================================================================
   自由猫 FreeCat.click - 品牌官网样式库
   框架理念：自由之境 (Free Horizon)
   视觉基调：大面积留白 · 远方地平线 · 海洋绿与米白色 · 宽屏套餐卡 · 流动地平线
   ========================================================================== */

:root {
  /* 品牌核心色彩 - 海洋绿与自然地平线 */
  --c-ocean-deep: #0F4C3A;       /* 深海浓绿，主标题与重点元素 */
  --c-ocean-primary: #1E7B5E;    /* 海洋碧绿，主色调与按钮 */
  --c-ocean-light: #2DD4BF;      /* 晨曦翠光，渐变高光与地平线光效 */
  --c-ocean-mist: #E8F5F1;       /* 海雾青浅底色，徽章与高亮卡片背景 */
  --c-ocean-border: #C8E6DD;     /* 浅海青边框 */

  /* 背景与留白色彩 - 米白与远境象牙 */
  --c-cream-bg: #FAF8F5;         /* 全局米白背景，柔和防疲劳 */
  --c-cream-surface: #FFFFFF;    /* 纯净卡片表面 */
  --c-cream-card: #FDFCF9;       /* 宽屏卡片微柔底色 */
  --c-cream-border: #E8E3DA;     /* 柔沙边框色 */

  /* 文字色彩 */
  --c-text-primary: #192521;     /* 墨绿深沉主文 */
  --c-text-secondary: #485650;   /* 次级段落文字 */
  --c-text-muted: #72827A;       /* 辅助微注文字 */
  --c-text-inverse: #FFFFFF;     /* 反白文本 */

  /* 状态与边框 */
  --c-accent-sand: #D4AF37;      /* 柔金/沙洲强调 */
  --c-card-shadow: 0 4px 20px -2px rgba(15, 76, 58, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.02);
  --c-card-shadow-hover: 0 12px 32px -4px rgba(15, 76, 58, 0.12), 0 4px 12px -2px rgba(0, 0, 0, 0.04);

  /* 排版尺寸与间距 */
  --font-sans: -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", monospace;
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--c-cream-bg);
  color: var(--c-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  max-width: 100vw;
  position: relative;
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
}

/* 容器与留白系统 - 大面积留白 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}

.section {
  padding-top: clamp(60px, 8vw, 110px);
  padding-bottom: clamp(60px, 8vw, 110px);
  position: relative;
}

.section-tight {
  padding-top: clamp(40px, 5vw, 70px);
  padding-bottom: clamp(40px, 5vw, 70px);
}

/* 地平线视觉元素 (Free Horizon Motif) */
.horizon-bar {
  position: relative;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, rgba(45, 212, 191, 0) 0%, rgba(45, 212, 191, 0.7) 25%, rgba(30, 123, 94, 0.9) 50%, rgba(45, 212, 191, 0.7) 75%, rgba(45, 212, 191, 0) 100%);
  background-size: 200% 100%;
  animation: horizonDrift 14s ease-in-out infinite alternate;
  overflow: hidden;
}

.horizon-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  max-width: 900px;
  height: 240px;
  background: radial-gradient(ellipse at center, rgba(45, 212, 191, 0.15) 0%, rgba(30, 123, 94, 0.05) 50%, rgba(250, 248, 245, 0) 75%);
  pointer-events: none;
  z-index: 0;
}

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

/* 头部导航 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-cream-border);
  transition: all 0.3s ease;
}

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

.header-logo {
  display: flex;
  align-items: center;
  height: 48px;
}

.header-logo img {
  height: 44px;
  width: auto;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--c-ocean-deep);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--c-ocean-primary);
  border-radius: 2px;
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 9999px;
  padding: 11px 24px;
  font-size: 0.95rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
  min-height: 44px; /* 触控标准 */
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-ocean-primary) 0%, var(--c-ocean-deep) 100%);
  color: var(--c-text-inverse);
  box-shadow: 0 4px 14px rgba(30, 123, 94, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 123, 94, 0.35);
  color: var(--c-text-inverse);
}

.btn-outline {
  background-color: transparent;
  color: var(--c-ocean-deep);
  border: 1px solid var(--c-ocean-primary);
}

.btn-outline:hover {
  background-color: var(--c-ocean-mist);
  color: var(--c-ocean-deep);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 18px;
  font-size: 0.88rem;
  min-height: 38px;
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
}

/* 移动端汉堡菜单 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--c-ocean-deep);
}

.menu-toggle svg {
  width: 28px;
  height: 28px;
}

/* 标头 Badge / 徽章 */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  background-color: var(--c-ocean-mist);
  border: 1px solid var(--c-ocean-border);
  color: var(--c-ocean-deep);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--c-ocean-primary);
  display: inline-block;
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.3);
}

/* 页面主要排版 */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto clamp(40px, 6vw, 64px) auto;
}

.section-title {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 700;
  color: var(--c-ocean-deep);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--c-text-secondary);
  line-height: 1.7;
}

/* Hero 英雄区域 - 自由之境 */
.hero-section {
  position: relative;
  padding-top: clamp(48px, 6vw, 76px);
  padding-bottom: clamp(16px, 2.5vw, 32px);
  text-align: center;
  background: linear-gradient(180deg, rgba(232, 245, 241, 0.4) 0%, rgba(250, 248, 245, 1) 100%);
  overflow: hidden;
}

#scenarios {
  padding-top: clamp(32px, 4vw, 52px);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--c-ocean-deep);
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-highlight {
  background: linear-gradient(135deg, var(--c-ocean-deep) 0%, var(--c-ocean-primary) 60%, var(--c-ocean-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--c-text-secondary);
  max-width: 700px;
  margin: 0 auto 36px auto;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-notice {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* 场景与网络体验判断指南网格 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.scenario-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-ocean-border);
  box-shadow: var(--c-card-shadow-hover);
}

.scenario-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--c-ocean-mist);
  color: var(--c-ocean-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.scenario-card h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  margin-bottom: 12px;
}

.scenario-card p {
  font-size: 0.95rem;
  color: var(--c-text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.scenario-metrics {
  background-color: var(--c-cream-bg);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.86rem;
  border-left: 3px solid var(--c-ocean-primary);
}

.scenario-metrics span {
  display: block;
  color: var(--c-text-secondary);
  margin-bottom: 4px;
}

.scenario-metrics strong {
  color: var(--c-ocean-deep);
}

/* 宽屏套餐卡 (Wide Plan Cards) - 自由之境核心特色 */
.plans-wrapper {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-top: 40px;
}

.wide-plan-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-xl);
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: 280px 1fr 240px;
  align-items: center;
  gap: 32px;
  transition: all 0.3s ease;
  position: relative;
  box-shadow: var(--c-card-shadow);
}

.wide-plan-card:hover {
  border-color: var(--c-ocean-border);
  box-shadow: var(--c-card-shadow-hover);
  transform: translateY(-2px);
}

.wide-plan-card.featured {
  border: 2px solid var(--c-ocean-primary);
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFCFB 100%);
}

.plan-badge {
  position: absolute;
  top: -13px;
  left: 36px;
  background: var(--c-ocean-primary);
  color: #FFFFFF;
  padding: 4px 16px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.plan-summary {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
}

.plan-audience {
  font-size: 0.92rem;
  color: var(--c-text-secondary);
  line-height: 1.5;
}

.plan-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--c-ocean-primary);
  font-weight: 600;
}

.plan-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 24px;
}

.detail-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
}

.detail-item svg {
  width: 18px;
  height: 18px;
  color: var(--c-ocean-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.detail-text strong {
  display: block;
  color: var(--c-ocean-deep);
  font-weight: 600;
  font-size: 0.92rem;
}

.detail-text span {
  color: var(--c-text-secondary);
  font-size: 0.86rem;
}

.plan-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 12px;
  border-left: 1px dashed var(--c-cream-border);
  padding-left: 28px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 2px;
}

.plan-price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
}

.plan-price-amount {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--c-ocean-deep);
  line-height: 1;
  letter-spacing: -0.02em;
}

.plan-price-unit {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--c-text-muted);
}

.plan-price-label {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

.plan-disclaimer {
  font-size: 0.78rem;
  color: var(--c-text-muted);
  line-height: 1.4;
  margin-top: 2px;
}

/* 规范核实提示条 */
.verification-banner {
  background: var(--c-ocean-mist);
  border: 1px solid var(--c-ocean-border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--c-text-secondary);
}

.verification-banner svg {
  width: 24px;
  height: 24px;
  color: var(--c-ocean-deep);
  flex-shrink: 0;
}

/* 文章精选列表与卡片 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 36px;
}

.article-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-ocean-border);
  box-shadow: var(--c-card-shadow-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-bottom: 14px;
}

.article-tag {
  background-color: var(--c-ocean-mist);
  color: var(--c-ocean-deep);
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 0.76rem;
}

.article-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color 0.2s;
}

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

.article-excerpt {
  font-size: 0.92rem;
  color: var(--c-text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ocean-primary);
  margin-top: auto;
}

/* 文章详情页正文排版 (Content Article) */
.article-header {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(30px, 4vw, 50px);
  text-align: center;
  background: linear-gradient(180deg, rgba(232, 245, 241, 0.4) 0%, rgba(250, 248, 245, 1) 100%);
  border-bottom: 1px solid var(--c-cream-border);
}

.article-header-inner {
  max-width: 820px;
  margin: 0 auto;
}

.article-header h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800;
  color: var(--c-ocean-deep);
  line-height: 1.3;
  margin-bottom: 18px;
}

.article-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--c-text-muted);
  flex-wrap: wrap;
}

.article-body-wrapper {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  padding-top: 50px;
  padding-bottom: 80px;
}

.article-main-content {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 5vw, 48px);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--c-text-primary);
}

.article-main-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--c-ocean-mist);
}

.article-main-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-main-content p {
  margin-bottom: 20px;
  color: var(--c-text-secondary);
}

.article-main-content ul, .article-main-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--c-text-secondary);
}

.article-main-content li {
  margin-bottom: 10px;
}

.article-main-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.94rem;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 24px;
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-md);
}

.table-responsive table {
  margin: 0;
  min-width: 540px;
}

.table-responsive th, .table-responsive td {
  padding: 12px 18px;
  text-align: left;
  border-bottom: 1px solid var(--c-cream-border);
}

.table-responsive th {
  background-color: var(--c-ocean-mist);
  color: var(--c-ocean-deep);
  font-weight: 600;
}

.table-responsive tr:last-child td {
  border-bottom: none;
}

.callout-box {
  background: var(--c-cream-bg);
  border-left: 4px solid var(--c-ocean-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 26px 0;
  font-size: 0.95rem;
}

.callout-box.tip {
  border-left-color: var(--c-ocean-light);
  background: #F2FAF8;
}

.callout-box.warning {
  border-left-color: #EAB308;
  background: #FEFDF5;
}

.callout-title {
  font-weight: 700;
  color: var(--c-ocean-deep);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 文章侧边栏与互链 */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-cream-border);
}

.sidebar-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-links a {
  font-size: 0.92rem;
  color: var(--c-text-secondary);
  line-height: 1.45;
  transition: color 0.2s;
  display: block;
}

.sidebar-links a:hover {
  color: var(--c-ocean-primary);
}

/* 统一底部顺序：用户反馈 -> FAQ -> 页脚 */

/* 用户评价卡片 (Reviews Grid - 图二模式) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.review-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--c-card-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-card-shadow-hover);
  border-color: var(--c-ocean-border);
}

.review-stars {
  color: #F59E0B;
  font-size: 1.15rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
  line-height: 1;
}

.review-quote {
  font-size: 0.94rem;
  color: var(--c-text-secondary);
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-divider {
  height: 1px;
  background: #F1F5F9;
  border-top: 1px solid var(--c-cream-border);
  margin-bottom: 18px;
}

.review-user-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #E0F2FE;
  color: #0284C7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.review-user-meta {
  display: flex;
  flex-direction: column;
}

.review-user-name {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--c-ocean-deep);
  line-height: 1.3;
}

.review-user-role {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-top: 2px;
}

/* 1. 用户反馈区域 (User Feedback Section) */
.feedback-section {
  background: linear-gradient(180deg, var(--c-cream-bg) 0%, #F5F1E9 100%);
  border-top: 1px solid var(--c-cream-border);
}

.feedback-card {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-xl);
  padding: clamp(28px, 5vw, 48px);
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--c-card-shadow);
}

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.form-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-ocean-deep);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-sm);
  background-color: var(--c-cream-bg);
  color: var(--c-text-primary);
  font-size: 0.95rem;
  transition: border-color 0.2s, background-color 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--c-ocean-primary);
  background-color: #FFFFFF;
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-help {
  font-size: 0.82rem;
  color: var(--c-text-muted);
}

.feedback-msg {
  display: none;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background: var(--c-ocean-mist);
  border: 1px solid var(--c-ocean-border);
  color: var(--c-ocean-deep);
  font-size: 0.92rem;
  margin-top: 12px;
  text-align: center;
}

/* 2. 常见问题 FAQ Section */
.faq-section {
  background-color: var(--c-cream-bg);
}

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

.faq-item {
  background: var(--c-cream-surface);
  border: 1px solid var(--c-cream-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item.active {
  border-color: var(--c-ocean-border);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-ocean-deep);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--c-ocean-primary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 22px;
}

.faq-answer p {
  color: var(--c-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 3. 页脚 Footer */
.site-footer {
  background-color: #121E19;
  color: #B2C2BB;
  padding-top: clamp(50px, 7vw, 80px);
  padding-bottom: 40px;
  border-top: 1px solid #1C2D26;
  font-size: 0.92rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: clamp(24px, 4vw, 48px);
  margin-bottom: 48px;
}

.footer-brand h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.footer-brand p {
  color: #8E9F97;
  line-height: 1.65;
  margin-bottom: 20px;
  max-width: 340px;
}

.footer-col h5 {
  font-size: 1rem;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #8E9F97;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--c-ocean-light);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid #1C2D26;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: #6D7F77;
}

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

.footer-bottom-links a {
  color: #8E9F97;
}

.footer-bottom-links a:hover {
  color: var(--c-ocean-light);
}

/* 移动端菜单抽屉 */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(250, 248, 245, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 24px;
  z-index: 99;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-ocean-deep);
  padding: 12px 0;
  border-bottom: 1px solid var(--c-cream-border);
}

/* 响应式调整 (Mobile & Tablet) */
@media (max-width: 1024px) {
  .wide-plan-card {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .plan-action {
    border-left: none;
    border-top: 1px dashed var(--c-cream-border);
    padding-left: 0;
    padding-top: 24px;
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .article-body-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-nav, .header-cta-group {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .wide-plan-card {
    padding: 24px 20px;
  }

  .plan-details {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .plan-action {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}