/* ========== 全局重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 深色基底 - 带蓝调底色，更有层次 */
  --bg-primary: #070b14;
  --bg-secondary: #0d1320;
  --bg-card: #111827;
  --bg-hover: #162032;
  --bg-elevated: #1a2334;

  /* 边框 */
  --border: #1a2334;
  --border-hover: #243049;
  --border-active: #2d3d5a;

  /* 文字 */
  --text-primary: #e8eef5;
  --text-secondary: #8b9bb4;
  --text-muted: #54657e;

  /* 主色 - 东海青 */
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --accent-light: rgba(6, 182, 212, 0.1);
  --accent-glow: rgba(6, 182, 212, 0.35);
  --accent-grad: linear-gradient(135deg, #06b6d4, #0ea5e9);

  /* 辅色 */
  --indigo: #6366f1;
  --gold: #f0b232;
  --green: #10b981;
  --amber: #f59e0b;
  --red: #ef4444;

  /* 圆角 */
  --radius: 14px;
  --radius-sm: 8px;
  --radius-xs: 6px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 50px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.15);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

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

/* ========== Header ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 11, 20, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.header-logo-svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.header-nav {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.header-nav a {
  position: relative;
  transition: color 0.2s;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-grad);
  border-radius: 2px;
  transition: width 0.25s ease;
}

.header-nav a:hover { color: var(--text-primary); }
.header-nav a:hover::after { width: 100%; }

.header-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.header-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

.header-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.header-toggle.active span:nth-child(2) { opacity: 0; }
.header-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  border-top: 1px solid transparent;
}

.mobile-menu.active {
  max-height: 200px;
  padding: 12px 24px;
  border-top: 1px solid var(--border);
}

.mobile-menu a {
  padding: 10px 0;
  color: var(--text-secondary);
  font-size: 15px;
  border-bottom: 1px solid var(--border);
}

.mobile-menu a:last-child { border-bottom: none; }

/* ========== Hero ========== */
.hero {
  position: relative;
  text-align: center;
  padding: 90px 0 70px;
  overflow: hidden;
}

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

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: orbFloat 12s ease-in-out infinite;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.4), transparent 70%);
  top: -100px;
  left: -50px;
}

.hero-orb-2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 70%);
  top: 50px;
  right: -80px;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.25), transparent 70%);
  bottom: -80px;
  left: 40%;
  animation-delay: -8s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(6, 182, 212, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--accent-light);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 100px;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 46px;
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #e8eef5 0%, #06b6d4 50%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}

.hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 32px;
}

.hero-stats {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 14px 32px;
  background: rgba(17, 24, 39, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.hero-stat-num {
  font-size: 22px;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-stat-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ========== 使用说明卡片 ========== */
.howitworks-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.howitworks-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.howitworks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.howitworks-step {
  position: relative;
  padding-left: 36px;
}

.howitworks-step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-grad);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.howitworks-step strong {
  display: block;
  color: var(--text-primary);
  font-size: 14px;
  margin-bottom: 4px;
}

.howitworks-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ========== 工具栏 ========== */
.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.search-box {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: all 0.2s;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-box input::placeholder { color: var(--text-muted); }

.search-box::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2354657e' stroke-width='2.5' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M21 21l-4.3-4.3'/%3E%3C/svg%3E") center/contain no-repeat;
}

.sort-box {
  position: relative;
}

.sort-select {
  appearance: none;
  -webkit-appearance: none;
  padding: 12px 36px 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s;
}

.sort-select:hover { border-color: var(--border-hover); }
.sort-select:focus { border-color: var(--accent); }

.sort-box::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b9bb4' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") center/contain no-repeat;
  pointer-events: none;
}

.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-grad);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

/* ========== 热门标签 ========== */
.hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hot-tags-label {
  font-size: 13px;
  color: var(--text-muted);
}

.hot-tag {
  padding: 4px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.hot-tag:hover {
  background: var(--accent-light);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent);
}

/* ========== 资源网格 ========== */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}

/* 骨架屏 */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.skeleton-shimmer {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-xs);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-icon { width: 44px; height: 44px; border-radius: 10px; }
.skeleton-line { height: 14px; border-radius: 4px; }
.skeleton-line-short { width: 60%; }
.skeleton-line-full { width: 100%; }
.skeleton-footer { display: flex; justify-content: space-between; margin-top: 8px; }
.skeleton-tag { width: 50px; height: 20px; border-radius: 4px; }
.skeleton-badge { width: 70px; height: 22px; border-radius: 100px; }

/* 资源卡片 */
.resource-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}

.resource-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.resource-card:hover {
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.resource-card:hover::before { opacity: 1; }

/* 解锁后卡片状态 */
.resource-card.unlocked {
  border-color: rgba(16, 185, 129, 0.3);
}

.resource-card.unlocked::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(16, 185, 129, 0.2);
  pointer-events: none;
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.resource-card:hover .card-icon {
  transform: scale(1.1);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  flex: 1;
}

.card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.card-tag {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  color: var(--text-muted);
}

.card-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-badge.free {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green);
}

.card-badge.paid {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber);
}

.card-badge.unlocked-badge {
  background: rgba(16, 185, 129, 0.2);
  color: var(--green);
}

.card-badge.unlocked-badge::before {
  content: '✓';
  font-size: 11px;
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .emoji { font-size: 48px; margin-bottom: 12px; }

/* ========== Modal 基础 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 18px;
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
  box-shadow: var(--shadow-lg);
}

@keyframes slideUp {
  from { transform: translateY(24px) scale(0.97); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  z-index: 10;
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* ========== 资源详情 Modal ========== */
.detail-content {
  padding: 32px;
}

.detail-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.detail-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.detail-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.detail-section {
  margin-bottom: 16px;
}

.detail-section h4 {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-section p {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.6;
}

.detail-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.detail-tag {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
}

.detail-download-btn {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s;
  margin-top: 8px;
}

.btn-tip {
  background: linear-gradient(135deg, var(--amber), #d97706);
  color: #fff;
}

.btn-tip:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}

.btn-free {
  background: linear-gradient(135deg, var(--green), #059669);
  color: #fff;
}

.btn-free:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35);
}

.btn-unlocked {
  background: var(--accent-grad);
  color: #fff;
}

.btn-unlocked:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

/* ========== Header 右侧区域 ========== */
.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-points {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: var(--accent-light);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.header-points-icon {
  font-size: 13px;
}

.header-points-num {
  min-width: 16px;
  text-align: center;
}

.header-member-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: linear-gradient(135deg, rgba(240, 178, 50, 0.2), rgba(245, 158, 11, 0.15));
  border: 1px solid rgba(240, 178, 50, 0.3);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
}

.header-purchase-btn {
  padding: 7px 18px;
  background: var(--accent-grad);
  border: none;
  border-radius: 100px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.header-purchase-btn:hover {
  opacity: 0.9;
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}

/* ========== 购买弹窗 Modal ========== */
.purchase-modal {
  max-width: 560px;
}

.purchase-content {
  padding: 32px;
}

.purchase-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}

.purchase-section {
  margin-bottom: 20px;
}

.purchase-section-title {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 积分套餐卡片 */
.pkg-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.pkg-card {
  position: relative;
  padding: 20px 12px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.pkg-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.pkg-card.selected {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 0 20px var(--accent-glow);
}

.pkg-card.pkg-popular {
  border-color: rgba(6, 182, 212, 0.3);
}

.pkg-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 10px;
  background: var(--accent-grad);
  border-radius: 100px;
  font-size: 10px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.pkg-points {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pkg-price {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
}

.purchase-confirm-btn {
  width: 100%;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.purchase-confirm-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* 分隔线 */
.purchase-divider {
  text-align: center;
  margin: 20px 0;
  position: relative;
}

.purchase-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
}

.purchase-divider span {
  position: relative;
  background: var(--bg-secondary);
  padding: 0 16px;
  font-size: 13px;
  color: var(--text-muted);
}

/* 会员卡片 */
.membership-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  background: linear-gradient(135deg, rgba(240, 178, 50, 0.08), rgba(245, 158, 11, 0.04));
  border: 1px solid rgba(240, 178, 50, 0.2);
  border-radius: var(--radius-sm);
}

.membership-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.membership-icon {
  font-size: 32px;
}

.membership-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.membership-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.membership-right {
  text-align: right;
}

.membership-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 6px;
}

.membership-buy-btn {
  padding: 8px 24px;
  background: linear-gradient(135deg, var(--gold), #d97706);
  border: none;
  border-radius: 100px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.membership-buy-btn:hover {
  opacity: 0.9;
  box-shadow: 0 4px 16px rgba(240, 178, 50, 0.35);
  transform: translateY(-1px);
}

/* 支付提示 */
.pay-hint {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-align: center;
}

.pay-hint-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: center;
}

.qr-row {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 28px;
}

.qr-item {
  text-align: center;
}

.qr-img {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 8px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.qr-img:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.qr-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-placeholder {
  font-size: 12px;
  color: var(--text-muted);
  padding: 20px;
  text-align: center;
}

.qr-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========== 兑换码输入 ========== */
.redeem-section {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  margin-top: 8px;
}

.redeem-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-align: center;
}

.redeem-input-row {
  display: flex;
  gap: 8px;
}

.redeem-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  text-align: center;
  letter-spacing: 1px;
  transition: all 0.2s;
}

.redeem-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.redeem-input::placeholder { color: var(--text-muted); letter-spacing: 0; }

.redeem-btn {
  padding: 12px 24px;
  background: var(--accent-grad);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.redeem-btn:hover {
  opacity: 0.9;
  box-shadow: 0 4px 16px var(--accent-glow);
}

/* ========== 详情页定价区域 ========== */
.detail-pricing {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}

.detail-price-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.detail-price-points {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.detail-price-or {
  font-size: 12px;
  color: var(--text-muted);
}

.detail-price-member {
  font-size: 14px;
  font-weight: 600;
  color: var(--gold);
}

.detail-balance {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
}

.detail-access-info {
  text-align: center;
  font-size: 13px;
  color: var(--green);
  margin-bottom: 8px;
  padding: 8px;
  background: rgba(16, 185, 129, 0.08);
  border-radius: var(--radius-xs);
}

.btn-points {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  color: #fff;
}

.btn-points:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

.btn-member {
  background: linear-gradient(135deg, var(--gold), #d97706);
  color: #fff;
}

.btn-member:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(240, 178, 50, 0.35);
}

.btn-membership-secondary {
  background: transparent;
  border: 1px solid rgba(240, 178, 50, 0.4);
  color: var(--gold);
  font-size: 14px;
  margin-top: 8px;
}

.btn-membership-secondary:hover {
  background: rgba(240, 178, 50, 0.08);
  border-color: var(--gold);
}

/* 会员徽章（卡片上） */
.card-badge.member-badge {
  background: rgba(240, 178, 50, 0.15);
  color: var(--gold);
}

.card-badge.member-badge::before {
  content: '👑';
  font-size: 11px;
  margin-right: 2px;
}

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  z-index: 200;
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
  box-shadow: var(--shadow-md);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: var(--green);
  color: #fff;
}

.toast.error {
  background: var(--red);
  color: #fff;
}

.toast.info {
  background: var(--accent);
  color: #fff;
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 45;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

.back-to-top:hover {
  background: var(--bg-elevated);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  background: var(--bg-secondary);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-logo-svg {
  width: 32px;
  height: 32px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.footer-social-link:hover {
  background: var(--accent-light);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-text {
  margin-bottom: 8px;
}

.footer-contact a {
  color: var(--accent);
  transition: opacity 0.2s;
}

.footer-contact a:hover { opacity: 0.8; }

/* ========== 抖动动画 ========== */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .hero h1 { font-size: 30px; }
  .hero { padding: 56px 0 44px; }
  .hero-stats { gap: 18px; padding: 12px 20px; }
  .hero-stat-num { font-size: 18px; }

  .header-nav { display: none; }
  .header-toggle { display: flex; }

  /* Header右侧在移动端缩小 */
  .header-right { gap: 6px; }
  .header-points { padding: 4px 8px; font-size: 12px; }
  .header-purchase-btn { padding: 5px 12px; font-size: 12px; }
  .header-member-badge { padding: 4px 8px; font-size: 11px; }
  .header-logo span { font-size: 15px; }
  .header-logo-svg { width: 30px; height: 30px; }

  .mobile-menu { display: flex; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .sort-box { width: 100%; }
  .sort-select { width: 100%; }

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

  .qr-row { flex-direction: column; align-items: center; }

  .footer-top { flex-direction: column; text-align: center; }

  .back-to-top { bottom: 20px; right: 20px; }

  .detail-content, .purchase-content { padding: 24px 20px; }

  /* 积分套餐在移动端单列 */
  .pkg-grid { grid-template-columns: 1fr; }

  /* 会员卡片在移动端纵向 */
  .membership-card { flex-direction: column; gap: 12px; text-align: center; }
  .membership-left { flex-direction: column; }
  .membership-right { text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 26px; }
  .hero-stats { flex-wrap: wrap; gap: 12px; }
  .hero-stat-divider { display: none; }

  /* 超小屏隐藏积分显示，只保留充值按钮 */
  .header-points { display: none; }
  .header-member-badge { display: none !important; }
}