/* 京浪玩家俱乐部 - 全新视觉风格 */
:root {
  --primary: #0a3d62;
  --secondary: #1289A7;
  --accent: #00d2d3;
  --wave1: #0a3d62;
  --wave2: #1289A7;
  --wave3: #00d2d3;
  --wave4: #54e1e3;
  --dark: #0a1a2e;
  --light: #f0f8ff;
  --sand: #f5e6d3;
  --text: #1a1a2e;
  --text-light: #6b7c93;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 5%;
  transition: all 0.4s ease;
}

.navbar.transparent {
  background: rgba(10, 29, 62, 0.75);
  backdrop-filter: blur(10px);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.08);
}

.navbar .container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-icon {
  width: 52px;
  height: 48px;
  background: transparent;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.logo-icon img {
  width: 54px;
  height: 44px;
  object-fit: contain;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.navbar.transparent .logo {
  color: white;
}

.navbar.scrolled .logo {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s;
  position: relative;
}

.navbar.transparent .nav-links a {
  color: rgba(255,255,255,0.85);
}

.navbar.scrolled .nav-links a {
  color: var(--text);
}

.nav-links a:hover {
  color: var(--accent) !important;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s;
}

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

.mobile-menu {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
  z-index: 1001;
}

.navbar.transparent .mobile-menu {
  color: white;
}

.navbar.scrolled .mobile-menu {
  color: var(--primary);
}

/* 英雄区 */
.hero {
  position: relative;
  height: 90vh;
  min-height: 600px;
  max-height: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--dark);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(10,29,62,0.4) 0%,
    rgba(10,58,98,0.6) 50%,
    rgba(10,29,62,0.85) 100%
  );
}

/* 波浪动画 */
.waves-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 200px;
  z-index: 5;
  overflow: hidden;
}

.wave {
  position: absolute;
  bottom: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background-repeat: repeat-x;
  transform-origin: center bottom;
}

.wave-1 {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%230a3d62' fill-opacity='0.6' d='M0,160L48,144C96,128,192,96,288,106.7C384,117,480,171,576,181.3C672,192,768,160,864,149.3C960,139,1056,149,1152,154.7C1248,161,1344,155,1392,149.3L1440,144L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E") repeat-x;
  background-size: 50% 100%;
  animation: wave 12s linear infinite;
  opacity: 0.8;
}

.wave-2 {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%231289A7' fill-opacity='0.5' d='M0,96L48,112C96,128,192,160,288,165.3C384,171,480,149,576,149.3C672,149,768,171,864,181.3C960,192,1056,192,1152,176C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E") repeat-x;
  background-size: 60% 100%;
  animation: wave 10s linear infinite reverse;
  animation-delay: -2s;
  opacity: 0.7;
}

.wave-3 {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%2300d2d3' fill-opacity='0.3' d='M0,128L48,138.7C96,149,192,171,288,170.7C384,171,480,149,576,138.7C672,128,768,128,864,138.7C960,149,1056,171,1152,176C1248,181,1344,171,1392,165.3L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E") repeat-x;
  background-size: 70% 100%;
  animation: wave 8s linear infinite;
  animation-delay: -4s;
  opacity: 0.6;
}

@keyframes wave {
  0% { transform: translateX(0); }
  100% { transform: translateX(50%); }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: white;
  max-width: 900px;
  padding: 0 2rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.2rem;
  text-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent), #54e1e3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-top: 0.8rem;
  font-weight: 400;
  letter-spacing: 3px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.hero-cta-main {
  padding: 14px 32px !important;
  font-size: 1rem !important;
  border-radius: 50px !important;
  box-shadow: 0 6px 25px rgba(0, 210, 211, 0.45) !important;
  background: var(--accent) !important;
  color: var(--dark) !important;
  font-weight: 700 !important;
  transform: translateY(0);
  transition: all 0.3s;
}

.hero-cta-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(0, 210, 211, 0.55) !important;
}

.hero-cta-secondary {
  padding: 14px 32px !important;
  font-size: 1rem !important;
  border-radius: 50px !important;
  background: rgba(255,255,255,0.15) !important;
  border: 2px solid rgba(255,255,255,0.5) !important;
  backdrop-filter: blur(10px);
  color: white !important;
  font-weight: 600 !important;
  transition: all 0.3s;
}

.hero-cta-secondary:hover {
  background: rgba(255,255,255,0.25) !important;
  border-color: white !important;
}

.hero-stats {
  display: none; /* 隐藏旧版stats，使用新的stats-bar */
}

.hero-wechat {
  display: none; /* 已移至悬浮按钮 */
}

/* 新的数据展示条 */
.stats-bar {
  background: white;
  padding: 0;
  box-shadow: 0 4px 20px rgba(10,29,62,0.08);
  position: relative;
  z-index: 10;
}

.stats-bar-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px 0;
  flex-wrap: wrap;
  gap: 20px;
}

.stats-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 30px;
}

.stats-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.stats-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 6px;
}

.stats-divider {
  width: 1px;
  height: 40px;
  background: #e0e6ed;
}

/* 微信悬浮按钮 */
.wechat-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #07c160, #04b03f);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(7,193,96,0.4);
  z-index: 1000;
  transition: all 0.3s;
  text-decoration: none;
}

.wechat-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(7,193,96,0.5);
}

.wechat-float span {
  font-size: 1.5rem;
}

/* 微信悬浮按钮动画 */
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 6px 20px rgba(7,193,96,0.4); }
  50% { box-shadow: 0 6px 30px rgba(7,193,96,0.7); }
}

.wechat-float {
  animation: pulse-green 2s ease-in-out infinite;
}
  display: flex;
  gap: 3rem;
  justify-content: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.hero-stat .label {
  font-size: 0.85rem;
  opacity: 0.7;
}

/* 幻灯片指示器 */
.slider-dots {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 20;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s;
}

.slider-dot.active {
  background: var(--accent);
  width: 30px;
  border-radius: 5px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #54e1e3);
  color: var(--dark);
  box-shadow: 0 8px 30px rgba(0,210,211,0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,210,211,0.5);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: white;
  color: var(--dark);
  border-color: white;
}

.btn-dark {
  background: var(--dark);
  color: white;
}

.btn-dark:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* 内容区块 */
.section {
  padding: 100px 5%;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.8rem;
  line-height: 1.25;
}

.section-desc {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* 活动分类 */
.categories-section {
  background: white;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.category-card {
  position: relative;
  height: 350px;
  border-radius: 24px;
  overflow: hidden;
  cursor: pointer;
  group: true;
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.category-card:hover img {
  transform: scale(1.1);
}

.category-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px;
  background: linear-gradient(transparent, rgba(10,29,62,0.9));
  color: white;
}

.category-overlay h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.category-overlay p {
  font-size: 0.85rem;
  opacity: 0.8;
}

.category-count {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,0.9);
  color: var(--dark);
  padding: 5px 12px;
  border-radius: 15px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* 活动列表 */
.activities-section {
  background: var(--light);
  padding-top: 60px;
}

.activities-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto 40px;
}

.category-tabs {
  display: flex;
  gap: 8px;
}

.category-tab {
  padding: 8px 20px;
  border-radius: 25px;
  border: 2px solid #e0e6ed;
  background: white;
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s;
}

.category-tab:hover,
.category-tab.active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--dark);
}

.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.activity-card {
  background: white;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(10,29,62,0.06);
  transition: all 0.5s cubic-bezier(0.5, 0, 0, 1);
  cursor: pointer;
}

.activity-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 25px 60px rgba(10,29,62,0.12);
}

.card-image {
  height: 200px;
  position: relative;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.activity-card:hover .card-image img {
  transform: scale(1.08);
}

.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: white;
  color: var(--dark);
  padding: 5px 12px;
  border-radius: 15px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-price {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: white;
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 15px;
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card-body {
  padding: 20px;
}

.card-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark);
}

.card-body p {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 12px;
  line-height: 1.5;
}

.card-meta {
  display: flex;
  gap: 16px;
  color: #8896a6;
  font-size: 0.8rem;
  padding-top: 12px;
  border-top: 1px solid #f0f4f8;
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 关于我们 */
.about-section {
  background: white;
  position: relative;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
}

.about-images {
  position: relative;
  height: 500px;
}

.about-img-main {
  position: absolute;
  top: 0;
  left: 0;
  width: 70%;
  height: 70%;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(10,29,62,0.15);
}

.about-img-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-img-secondary {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 55%;
  height: 55%;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(10,29,62,0.15);
  border: 6px solid white;
}

.about-img-secondary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-float-card {
  position: absolute;
  bottom: 40%;
  right: -20px;
  background: white;
  padding: 20px 28px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(10,29,62,0.12);
  display: flex;
  align-items: center;
  gap: 16px;
}

.about-float-card .icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.about-float-card .number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dark);
  display: block;
}

.about-float-card .label {
  font-size: 0.8rem;
  color: var(--text-light);
}

.about-content h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--dark);
  line-height: 1.2;
}

.about-content h2 span {
  color: var(--accent);
}

.about-content > p {
  color: var(--text-light);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 14px;
}

.about-feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(0,210,211,0.1), rgba(18,137,167,0.1));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.about-feature h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 2px;
}

.about-feature p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* 加入我们 */
.join-section {
  background: var(--dark);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 120px 5%;
}

.join-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='40' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='0.5'/%3E%3C/svg%3E");
  background-size: 60px;
}

.join-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.join-content h2 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1.2rem;
}

.join-content p {
  font-size: 1.2rem;
  opacity: 0.8;
  margin-bottom: 3rem;
}

.member-benefits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 3rem;
}

.benefit {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 28px 20px;
  border-radius: 20px;
  transition: all 0.3s;
}

.benefit:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-5px);
}

.benefit-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.benefit h4 {
  color: var(--accent);
  margin-bottom: 8px;
  font-size: 1rem;
}

.benefit p {
  font-size: 0.85rem;
  opacity: 0.7;
  margin: 0;
  line-height: 1.5;
}

/* 联系区域 */
.contact-section {
  background: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-info {
  padding-right: 40px;
}

.contact-info h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--dark);
}

.contact-info > p {
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(0,210,211,0.1), rgba(18,137,167,0.1));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin: 0;
}

.form-box {
  background: var(--light);
  padding: 40px;
  border-radius: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e8edf2;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s;
  background: white;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0,210,211,0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* 页脚 */
.footer {
  background: var(--dark);
  color: white;
  padding: 80px 5% 40px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: white;
  margin-bottom: 1.2rem;
}

.footer-brand p {
  opacity: 0.6;
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 1.5rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.3s;
}

.footer-social a:hover {
  background: var(--accent);
  color: var(--dark);
}

.footer-wechat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-wechat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

.footer-wechat-name {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
  font-weight: 500;
}

.footer-links h4 {
  color: var(--accent);
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0.5;
  font-size: 0.85rem;
}

/* 管理后台 */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 280px;
  background: linear-gradient(180deg, var(--dark) 0%, var(--primary) 100%);
  color: white;
  padding: 30px 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.admin-sidebar h2 {
  padding: 0 25px;
  margin-bottom: 35px;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-nav {
  list-style: none;
}

.admin-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 25px;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: all 0.3s;
  border-left: 3px solid transparent;
  font-size: 0.9rem;
}

.admin-nav a:hover,
.admin-nav a.active {
  background: rgba(255,255,255,0.08);
  color: white;
  border-left-color: var(--accent);
}

.admin-main {
  flex: 1;
  margin-left: 280px;
  padding: 30px;
  background: #f0f4f8;
  min-height: 100vh;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.admin-header h1 {
  font-size: 1.6rem;
  color: var(--dark);
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 28px;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(10,29,62,0.04);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
}

.stat-card h4 {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 12px;
  font-weight: 500;
}

.stat-card .number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark);
}

.stat-card .icon {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  opacity: 0.1;
}

.admin-table {
  background: white;
  border-radius: 20px;
  padding: 25px;
  box-shadow: 0 4px 20px rgba(10,29,62,0.04);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 14px 16px;
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid #f0f4f8;
}

td {
  padding: 16px;
  border-bottom: 1px solid #f5f7fa;
  font-size: 0.9rem;
}

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

.status-badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-badge.pending { background: #fff3cd; color: #856404; }
.status-badge.approved { background: #d4edda; color: #155724; }
.status-badge.open { background: #d4edda; color: #155724; }
.status-badge.closed { background: #f8d7da; color: #721c24; }

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10,29,62,0.6);
  backdrop-filter: blur(5px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  padding: 40px;
  border-radius: 24px;
  width: 90%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 80px rgba(10,29,62,0.2);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.modal-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--dark);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f0f4f8;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.modal-close:hover {
  background: #e8edf2;
}

/* 响应式 */
@media (max-width: 1024px) {
  .categories-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-images {
    height: 350px;
    max-width: 500px;
    margin: 0 auto;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat .number {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 2.2rem;
  }

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

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

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

  .activities-header {
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 5%;
    gap: 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    color: var(--text) !important;
    border-bottom: 1px solid #f0f4f8;
  }

  .mobile-menu {
    display: block;
  }

  .hero {
    min-height: 600px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .section {
    padding: 60px 5%;
  }

  .categories-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .category-card {
    height: 250px;
  }

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

  .activities-header {
    flex-direction: column;
    gap: 16px;
  }

  .category-tabs {
    flex-wrap: wrap;
  }

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

  .about-images {
    height: 280px;
  }

  .member-benefits {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .admin-stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .admin-sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }

  .admin-main {
    margin-left: 0;
  }

  .admin-nav {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .admin-nav a {
    padding: 10px 14px;
    border-left: none;
    border-bottom: 2px solid transparent;
  }

  .admin-nav a.active {
    border-left: none;
    border-bottom-color: var(--accent);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 6px 16px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .about-images {
    height: 220px;
  }

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

  .admin-stats {
    grid-template-columns: 1fr;
  }

  .form-box {
    padding: 24px;
  }

  .modal-content {
    padding: 24px;
    margin: 20px;
  }
}

/* ========== PC 大屏适配 ========== */

/* 小桌面：1025px - 1199px */
@media (min-width: 1025px) and (max-width: 1199px) {
  .container {
    max-width: 1100px;
  }

  .hero-content {
    max-width: 800px;
  }

  .hero-title {
    font-size: 3.8rem;
  }

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

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

  .about-grid {
    gap: 50px;
  }

  .about-images {
    height: 420px;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
  }
}

/* 中等桌面：1200px - 1439px */
@media (min-width: 1200px) and (max-width: 1439px) {
  .container {
    max-width: 1200px;
  }

  .hero-content {
    max-width: 850px;
  }

  .hero-title {
    font-size: 4rem;
  }

  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .activities-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    gap: 60px;
  }

  .about-images {
    height: 450px;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
  }

  .member-benefits {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

/* 大屏桌面：1440px+ */
@media (min-width: 1440px) {
  :root {
    font-size: 17px;
  }

  .container {
    max-width: 1360px;
  }

  .hero-content {
    max-width: 950px;
  }

  .hero-title {
    font-size: 4.5rem;
  }

  .hero-subtitle {
    font-size: 1.35rem;
  }

  .hero-stats {
    gap: 4rem;
  }

  .hero-stat .number {
    font-size: 2.8rem;
  }

  .section {
    padding: 100px 5%;
  }

  .section-title {
    font-size: 2.8rem;
  }

  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .category-card {
    height: 380px;
  }

  .activities-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .about-grid {
    gap: 80px;
  }

  .about-images {
    height: 520px;
  }

  .about-content h2 {
    font-size: 2.8rem;
  }

  .about-content > p {
    font-size: 1.1rem;
  }

  .about-feature {
    padding: 4px 0;
  }

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

  .benefit {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
  }

  .contact-grid {
    gap: 80px;
  }

  .admin-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 超大屏：1920px+ */
@media (min-width: 1920px) {
  :root {
    font-size: 18px;
  }

  .container {
    max-width: 1600px;
  }

  .hero-title {
    font-size: 5rem;
  }

  .hero-content {
    max-width: 1100px;
  }

  .activities-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }

  .about-images {
    height: 580px;
  }

  .about-content h2 {
    font-size: 3.2rem;
  }

  .about-content > p {
    font-size: 1.15rem;
    line-height: 1.9;
  }

  .member-benefits {
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 80px;
  }
}

/* ============================================
   排版优化 - 2026-03-31
   ============================================ */

/* Hero 区优化 */
.hero-badge {
  animation: badge-pulse 3s ease-in-out infinite;
}
@keyframes badge-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.03); }
}

.hero-actions {
  gap: 16px;
}
.hero-actions .btn {
  transition: all 0.3s ease;
  font-weight: 600;
}
.hero-actions .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,210,211,0.35);
}

/* 滚动指示器 */
.hero-scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.75rem;
  animation: scroll-bounce 2s ease-in-out infinite;
  z-index: 10;
}
.hero-scroll-indicator span { letter-spacing: 2px; }
@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* 运动分类卡片优化 */
.category-card {
  height: 400px;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 4px 20px rgba(10,61,98,0.08);
}
.category-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(10,61,98,0.18);
}
.category-overlay {
  padding: 24px 28px;
  background: linear-gradient(transparent 30%, rgba(10,29,62,0.92) 100%);
}
.category-count {
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(0,210,211,0.3);
}

/* 活动 tab 优化 */
.category-tab {
  border-radius: 20px;
  padding: 8px 20px;
  font-weight: 500;
  transition: all 0.25s ease;
  border: 1.5px solid transparent;
}
.category-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 15px rgba(10,61,98,0.25);
}
.category-tab:not(.active):hover {
  border-color: var(--secondary);
  color: var(--secondary);
  background: rgba(18,137,167,0.06);
}

/* 关于我们优化 */
.about-section .about-content h2 {
  line-height: 1.25;
}
.about-section .about-content p {
  line-height: 1.8;
  color: var(--text-light);
}
.about-feature {
  padding: 16px;
  border-radius: 14px;
  transition: all 0.3s ease;
  background: var(--light);
}
.about-feature:hover {
  background: white;
  box-shadow: 0 4px 20px rgba(10,61,98,0.1);
  transform: translateY(-2px);
}
.about-feature-icon {
  font-size: 1.6rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.about-float-card {
  background: white;
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  padding: 16px 20px;
  right: -16px;
  bottom: -16px;
}

/* 加入我们优化 */
.benefit {
  text-align: center;
  padding: 30px 18px;
  border-radius: 20px;
  border: 1.5px solid rgba(255,255,255,0.08);
  transition: all 0.35s ease;
}
.benefit:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(0,210,211,0.4);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.benefit-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.benefit h4 {
  font-size: 1rem;
  margin-bottom: 6px;
}
.benefit p {
  font-size: 0.82rem;
  opacity: 0.7;
}

/* Footer 优化 */
.footer-grid { gap: 40px; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { line-height: 1.8; }
.footer-links h4 {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 14px;
  font-size: 0.9rem;
  letter-spacing: 1px;
}
.footer-links a {
  transition: all 0.2s ease;
  padding-left: 0;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 6px;
}
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* 活动骨架屏加载 */
.activity-skeleton {
  background: linear-gradient(90deg, #f0f4f8 25%, #e8eef4 50%, #f0f4f8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 20px;
  height: 340px;
  background-color: #f0f4f8;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* 弹窗优化 */
#activityModal > div {
  border-radius: 24px;
  padding: 36px;
}

/* 加入我们 CTA 按钮优化 */
.join-section .btn-primary {
  padding: 16px 48px;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  animation: cta-glow 2.5s ease-in-out infinite;
}
@keyframes cta-glow {
  0%, 100% { box-shadow: 0 8px 30px rgba(0,210,211,0.35); }
  50% { box-shadow: 0 8px 40px rgba(0,210,211,0.55), 0 0 60px rgba(0,210,211,0.15); }
}
.join-section .btn-primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 16px 50px rgba(0,210,211,0.5);
}