/* ========================================
   萌站 MengZhan - 二次元文化社区样式表
   配色：粉嫩梦幻二次元风格（基于 favicon 色调）
   ======================================== */

/* CSS 变量 - 主题色管理 */
:root {
  --primary: #FF8FAB;
  --primary-dark: #FF6B8A;
  --accent: #FF7096;
  --accent-secondary: #FF5C85;
  --lavender: #FFCAD8;
  --bg-light: #FFF8FA;
  --bg-card: #FFF0F5;
  --bg-white: #ffffff;
  --dark-purple: #35101F;
  --dark-purple-secondary: #521C32;
  --text-title: #C93A5E;
  --text-body: #666666;
  --text-light: #aaaaaa;
  --gradient-primary: linear-gradient(135deg, #FF8FAB, #FF6B8A);
  --gradient-secondary: linear-gradient(135deg, #FFB8CA, #FF8FAB);
  --gradient-hero: linear-gradient(160deg, #35101F 0%, #521C32 40%, #8B2F4F 100%);
  --shadow-card: 0 8px 32px rgba(255, 143, 171, 0.12);
  --shadow-hover: 0 16px 48px rgba(255, 143, 171, 0.22);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-full: 50px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  color: var(--text-body);
  background-color: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   按钮组件
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-family);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.2);
  opacity: 0;
  transition: var(--transition);
}

.btn:hover::after {
  opacity: 1;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 143, 171, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(255, 143, 171, 0.6);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-full);
}

.btn-sm:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 143, 171, 0.4);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.btn-cta {
  background: #fff;
  color: var(--dark-purple);
  font-weight: 700;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.btn-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.btn-nav {
  background: var(--gradient-primary);
  color: #fff;
  padding: 10px 24px;
  font-size: 14px;
  box-shadow: 0 2px 12px rgba(255, 143, 171, 0.3);
}

.btn-nav:hover {
  box-shadow: 0 4px 20px rgba(255, 143, 171, 0.5);
  transform: translateY(-1px);
}

/* ========================================
   头部导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(53, 16, 31, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 143, 171, 0.15);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(53, 16, 31, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

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

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo-text {
  font-size: 22px;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  font-weight: 400;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link i {
  font-size: 13px;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255, 143, 171, 0.15);
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero 首屏
   ======================================== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 120px 0 72px;
}

.hero-bg-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}

.hero-circle-1 {
  width: 400px;
  height: 400px;
  background: #FF8FAB;
  top: -80px;
  right: -60px;
  animation: floatCircle 8s ease-in-out infinite;
}

.hero-circle-2 {
  width: 320px;
  height: 320px;
  background: #FF6B8A;
  bottom: -40px;
  left: -40px;
  animation: floatCircle 10s ease-in-out infinite reverse;
}

.hero-circle-3 {
  width: 240px;
  height: 240px;
  background: #FFB8CA;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: floatCircle 12s ease-in-out infinite;
}

@keyframes floatCircle {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 143, 171, 0.15);
  border: 1px solid rgba(255, 143, 171, 0.25);
  color: rgba(255, 255, 255, 0.85);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
}

.hero-badge i {
  color: var(--accent);
  font-size: 12px;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
  text-shadow: 0 2px 30px rgba(255, 143, 171, 0.3);
}

.hero-subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.05rem);
  color: rgba(255, 255, 255, 0.65);
  max-width: 580px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats {
  display: inline-flex;
  align-items: center;
  gap: 0;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 20px 8px;
  backdrop-filter: blur(8px);
}

.stat-item {
  text-align: center;
  padding: 0 32px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
}

.stat-number {
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline;
  line-height: 1.2;
}

.stat-unit {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-plus {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  margin-top: 2px;
}

/* ========================================
   通用区块标题
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 143, 171, 0.1);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-light);
  max-width: 500px;
  margin: 0 auto;
}

/* ========================================
   平台特色
   ======================================== */
.features {
  padding: 100px 0;
  background: var(--bg-white);
}

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

.feature-card {
  background: var(--bg-white);
  border: 1px solid rgba(255, 143, 171, 0.1);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 143, 171, 0.3);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(255, 143, 171, 0.1), rgba(255, 107, 138, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--primary);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--gradient-primary);
  color: #fff;
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
}

/* ========================================
   丰富的内容板块
   ======================================== */
.sections {
  padding: 100px 0;
  background: var(--bg-light);
}

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

.content-block {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  border: 1px solid rgba(255, 143, 171, 0.08);
  transition: var(--transition);
}

.content-block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.content-block-icon {
  width: 64px;
  height: 64px;
  min-width: 64px;
  border-radius: 16px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
}

.content-block-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.content-block-body > p {
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 16px;
}

.content-list {
  margin-bottom: 20px;
}

.content-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 14px;
  color: var(--text-body);
}

.content-list li i {
  color: var(--primary);
  font-size: 12px;
}

/* ========================================
   会员权益
   ======================================== */
.membership {
  padding: 100px 0;
  background: var(--bg-white);
}

.membership-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.member-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  border: 1px solid rgba(255, 143, 171, 0.1);
  transition: var(--transition);
  position: relative;
}

.member-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.member-card-featured {
  border: 2px solid var(--primary);
  background: linear-gradient(180deg, rgba(255, 143, 171, 0.03), var(--bg-white));
}

.member-card-featured::before {
  content: '推荐';
  position: absolute;
  top: -1px;
  right: 24px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 0 0 8px 8px;
}

.member-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-title);
  margin-bottom: 20px;
}

.badge-active {
  background: linear-gradient(135deg, rgba(255, 184, 202, 0.25), rgba(255, 143, 171, 0.18));
  color: #FF6B8A;
}

.badge-creator {
  background: var(--gradient-primary);
  color: #fff;
}

.badge-vip {
  background: linear-gradient(135deg, #ffd700, #ffaa00);
  color: #5d4e00;
}

.member-icon {
  font-size: 40px;
  margin-bottom: 20px;
  color: var(--primary);
}

.member-card-featured .member-icon {
  color: var(--accent);
}

.member-perks {
  margin-bottom: 24px;
}

.member-perks li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-body);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.member-perks li:last-child {
  border-bottom: none;
}

.member-perks li i {
  color: var(--primary);
  font-size: 12px;
  min-width: 16px;
}

.member-card .btn-outline {
  color: var(--text-title);
  border-color: rgba(255, 143, 171, 0.3);
}

.member-card .btn-outline:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
}

/* ========================================
   FAQ 常见问题
   ======================================== */
.faq {
  padding: 100px 0;
  background: var(--bg-light);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid rgba(255, 143, 171, 0.08);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 143, 171, 0.2);
}

.faq-item.open {
  box-shadow: var(--shadow-card);
  border-color: rgba(255, 143, 171, 0.3);
}

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

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

.faq-arrow {
  font-size: 14px;
  color: var(--primary);
  transition: var(--transition);
  min-width: 20px;
  text-align: center;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
}

/* ========================================
   最新资讯
   ======================================== */
.news {
  padding: 100px 0;
  background: var(--bg-white);
}

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

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 143, 171, 0.08);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.news-thumb {
  height: 160px;
  background: var(--gradient-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}

.news-thumb::before {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  top: -30px;
  right: -30px;
}

.news-thumb::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  bottom: -20px;
  left: -20px;
}

.news-body {
  padding: 24px;
}

.news-tag {
  display: inline-block;
  padding: 3px 12px;
  background: rgba(255, 143, 171, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.news-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-body p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

.news-link:hover {
  color: var(--primary-dark);
  gap: 10px;
}

/* ========================================
   CTA 横幅
   ======================================== */
.cta {
  padding: 100px 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: rgba(255, 143, 171, 0.15);
  border-radius: 50%;
  filter: blur(100px);
  top: -200px;
  right: -100px;
}

.cta::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: rgba(255, 107, 138, 0.15);
  border-radius: 50%;
  filter: blur(100px);
  bottom: -200px;
  left: -100px;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-subtitle {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 36px;
}

/* ========================================
   Footer 页脚
   ======================================== */
.footer {
  background: var(--dark-purple);
  padding: 60px 0 0;
  color: rgba(255, 255, 255, 0.6);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ========================================
   返回顶部
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(255, 143, 171, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(255, 143, 171, 0.6);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(53, 16, 31, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 143, 171, 0.15);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
  }

  .btn-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

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

  .content-blocks {
    grid-template-columns: 1fr;
  }

  .content-block {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .content-list li {
    justify-content: center;
  }

  .membership-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

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

  .hero {
    padding: 100px 0 56px;
  }

  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
    padding: 16px 4px;
  }

  .stat-item {
    padding: 0 20px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .stat-divider {
    height: 32px;
  }

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

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    padding: 16px;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

  .stat-item {
    padding: 8px 0;
  }

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

/* ========================================
   子页面通用样式
   ======================================== */

/* 子页面 Hero 横幅 */
.page-hero {
  background: var(--gradient-hero);
  padding: 120px 0 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  width: 360px;
  height: 360px;
  background: rgba(255, 143, 171, 0.12);
  border-radius: 50%;
  filter: blur(80px);
  top: -120px;
  right: -60px;
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb i {
  font-size: 10px;
}

.page-hero-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.page-hero-title i {
  margin-right: 10px;
  opacity: 0.8;
}

.page-hero-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.6);
}

/* 子页面主体内容 */
.page-content {
  padding: 64px 0 80px;
  background: var(--bg-light);
}

.page-body {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 48px;
  border: 1px solid rgba(255, 143, 171, 0.08);
  box-shadow: var(--shadow-card);
}

.page-section {
  margin-bottom: 40px;
}

.page-section:last-child {
  margin-bottom: 0;
}

.page-section h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg-card);
}

.page-section h2 i {
  margin-right: 8px;
  color: var(--primary);
}

.page-section h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}

.page-section p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 12px;
}

.page-section p:last-child {
  margin-bottom: 0;
}

.page-section a {
  color: var(--primary);
  font-weight: 500;
}

.page-section a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.page-list {
  margin: 12px 0;
  padding-left: 0;
}

.page-list li {
  position: relative;
  padding: 6px 0 6px 20px;
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
}

.page-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.page-list li strong {
  color: var(--text-title);
}

/* 用户手册 - 步骤样式 */
.guide-steps {
  margin: 24px 0;
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 143, 171, 0.08);
}

.guide-step:last-child {
  border-bottom: none;
}

.guide-step-num {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.guide-step h3 {
  margin-bottom: 4px;
}

.guide-step p {
  margin-bottom: 0;
}

/* 技术支持 - 卡片样式 */
.support-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.support-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(255, 143, 171, 0.08);
  transition: var(--transition);
}

.support-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.support-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.support-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}

.support-card p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.support-info {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255, 143, 171, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
}

/* 问题反馈 - 类型卡片 */
.feedback-types {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.feedback-type-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(255, 143, 171, 0.08);
  transition: var(--transition);
}

.feedback-type-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.feedback-type-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.feedback-type-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}

.feedback-type-card p {
  font-size: 14px;
  color: var(--text-light);
}

/* 子页面响应式 */
@media (max-width: 768px) {
  .page-hero {
    padding: 100px 0 36px;
  }

  .page-body {
    padding: 28px 20px;
  }

  .support-cards,
  .feedback-types {
    grid-template-columns: 1fr;
  }

  .guide-step {
    gap: 14px;
  }
}

/* ========================================
   新闻卡片日期
   ======================================== */
.news-date {
  display: inline-block;
  font-size: 12px;
  color: var(--text-light);
  margin-left: 8px;
}

.news-date i {
  margin-right: 3px;
}

/* ========================================
   文章详情页
   ======================================== */
.article-body {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 48px;
  border: 1px solid rgba(255, 143, 171, 0.08);
  box-shadow: var(--shadow-card);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--bg-card);
}

.article-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255, 143, 171, 0.12);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.article-date,
.article-author {
  font-size: 14px;
  color: var(--text-light);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.article-date i,
.article-author i {
  color: var(--primary);
  font-size: 13px;
}

.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-title);
  margin: 28px 0 12px;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
}

.article-body > p,
.article-body > ul {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 14px;
}

.article-body > ul {
  padding-left: 0;
}

.article-body > ul li {
  position: relative;
  padding: 4px 0 4px 20px;
}

.article-body > ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* 文章底部导航与标签 */
.article-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 2px solid var(--bg-card);
}

.article-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--text-light);
}

.article-tags a {
  display: inline-block;
  padding: 3px 12px;
  background: var(--bg-card);
  color: var(--primary);
  font-size: 13px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.article-tags a:hover {
  background: var(--primary);
  color: #fff;
}

.article-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 0;
}

.article-nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-title);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

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

.article-nav-label {
  font-size: 13px;
  color: var(--text-light);
}

.article-nav-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 143, 171, 0.2);
  flex-shrink: 0;
}

/* 文章底部 CTA */
.article-cta {
  margin-top: 36px;
  padding: 36px;
  background: var(--gradient-hero);
  border-radius: var(--radius);
  text-align: center;
}

.article-cta h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 8px;
  padding-left: 0;
  border-left: none;
}

.article-cta p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}

/* 文章页响应式 */
@media (max-width: 768px) {
  .article-body {
    padding: 28px 20px;
  }

  .article-cta {
    padding: 28px 20px;
  }

  .article-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-nav-divider {
    display: none;
  }
}