/**
 * 海外短剧H5推广裂变系统 - 样式表
 * ==========================================
 * 深色主题（黑+红+白）| 移动端优先 | 短剧情绪化风格
 */

/* ==========================================
   CSS变量 & 重置
   ========================================== */
:root {
  --color-bg: #0a0a0a;
  --color-bg-secondary: #1a1a1a;
  --color-bg-card: #222222;
  --color-primary: #ff2d55;
  --color-primary-dark: #d41e43;
  --color-primary-light: #ff6b8a;
  --color-text: #ffffff;
  --color-text-secondary: #aaaaaa;
  --color-text-muted: #666666;
  --color-whatsapp: #25d366;
  --color-whatsapp-dark: #1da851;
  --color-border: #333333;
  --color-overlay: rgba(0, 0, 0, 0.85);
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-btn: 0 4px 15px rgba(255, 45, 85, 0.4);
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
}

/* ==========================================
   页面系统
   ========================================== */
.page {
  display: none;
  min-height: 100vh;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   落地页
   ========================================== */
.landing-container {
  max-width: 480px;
  margin: 0 auto;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.landing-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--color-primary);
  color: white;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  z-index: 10;
  text-transform: uppercase;
}

/* 封面区域 */
.landing-cover {
  position: relative;
  width: 100%;
  height: 55vh;
  min-height: 320px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.cover-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.cover-emoji {
  font-size: 64px;
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}

.cover-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.cover-lines span {
  display: block;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.15);
}

.cover-lines span:nth-child(1) { width: 120px; }
.cover-lines span:nth-child(2) { width: 80px; }
.cover-lines span:nth-child(3) { width: 100px; }

.cover-hint {
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.cover-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 内容区域 */
.landing-content {
  flex: 1;
  padding: 24px 20px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.landing-title {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--color-text);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.landing-subtitle {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* 社交证明 */
.social-proof {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}

.proof-item {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-card);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.proof-icon {
  font-size: 16px;
}

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

/* CTA按钮 */
.landing-footer {
  margin-top: 16px;
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ==========================================
   按钮系统
   ========================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-primary);
  color: white;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  font-size: 17px;
  font-weight: 700;
  box-shadow: var(--shadow-btn);
  transition: var(--transition);
  min-width: 200px;
  text-align: center;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 45, 85, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-large {
  padding: 18px 40px;
  font-size: 18px;
  min-width: 240px;
}

.btn-cta {
  width: 100%;
  max-width: 320px;
}

.btn-icon {
  font-size: 20px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-primary);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--color-primary);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
}

/* 脉冲动画 */
.pulse-animation {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

/* ==========================================
   视频播放页
   ========================================== */
.video-page-container {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.video-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.btn-back {
  background: none;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-back:hover {
  background: rgba(255, 255, 255, 0.1);
}

#episode-label {
  font-size: 14px;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* 视频容器 */
.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 60vh;
  background: #000;
  overflow: hidden;
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

/* 视频覆盖层 */
.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.video-overlay.show {
  display: flex;
}

.overlay-content {
  text-align: center;
  padding: 24px;
}

.overlay-emoji {
  font-size: 48px;
  margin-bottom: 16px;
}

.overlay-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.overlay-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* 手动播放按钮 */
.btn-play-large {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: rgba(255, 45, 85, 0.9);
  padding: 30px 40px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.btn-play-large:hover {
  background: var(--color-primary);
  transform: scale(1.05);
}

.play-icon {
  font-size: 36px;
}

.play-text {
  font-size: 16px;
  font-weight: 600;
  color: white;
}

/* 视频回退UI */
.video-fallback {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 24px;
  text-align: center;
}

.fallback-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.fallback-text {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.fallback-sub {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* 剧集进度条 */
.episode-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 24px;
  gap: 0;
}

.episode-progress-item {
  display: flex;
  align-items: center;
  gap: 0;
}

.progress-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.episode-progress-item.active .progress-dot {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  box-shadow: 0 0 12px rgba(255, 45, 85, 0.5);
}

.episode-progress-item.completed .progress-dot {
  background: var(--color-primary-dark);
  border-color: var(--color-primary);
  color: white;
}

.progress-line {
  width: 60px;
  height: 3px;
  background: var(--color-border);
  margin: 0 4px;
  border-radius: 2px;
}

.episode-progress-item.completed .progress-line {
  background: var(--color-primary);
}

/* 视频操作按钮 */
.video-actions {
  padding: 16px 20px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.btn-cps {
  width: 100%;
  max-width: 320px;
}

/* ==========================================
   裂变弹窗
   ========================================== */
.popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.popup-overlay.show {
  display: flex;
}

.popup-container {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  position: relative;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.popup-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 20px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: none;
  border: none;
}

.popup-close:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.1);
}

.popup-emoji {
  font-size: 56px;
  margin-bottom: 16px;
}

.popup-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}

.popup-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* 奖励提示 */
.popup-reward {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 45, 85, 0.1);
  border: 1px solid rgba(255, 45, 85, 0.3);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.reward-icon {
  font-size: 20px;
}

.reward-text {
  font-size: 14px;
  color: var(--color-primary-light);
  font-weight: 600;
}

/* WhatsApp按钮 */
.btn-whatsapp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--color-whatsapp);
  color: white;
  padding: 16px 28px;
  border-radius: var(--radius-full);
  font-size: 17px;
  font-weight: 700;
  width: 100%;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  background: var(--color-whatsapp-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.4);
}

.wa-icon {
  font-size: 22px;
}

/* 跳过按钮 */
.btn-skip {
  background: none;
  color: var(--color-text-muted);
  font-size: 14px;
  padding: 12px;
  margin-top: 8px;
  transition: var(--transition);
}

.btn-skip:hover {
  color: var(--color-text-secondary);
}

/* 弹窗CPS备选 */
.popup-cps-alt {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.alt-text {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.btn-cps-alt {
  display: inline-flex;
  padding: 12px 24px;
  font-size: 15px;
  min-width: auto;
}

/* ==========================================
   响应式适配
   ========================================== */
@media (max-width: 360px) {
  .landing-title {
    font-size: 20px;
  }

  .btn-primary {
    padding: 14px 24px;
    font-size: 15px;
  }

  .social-proof {
    flex-direction: column;
    gap: 10px;
  }

  .popup-container {
    padding: 24px 18px;
  }

  .popup-title {
    font-size: 19px;
  }
}

@media (min-width: 481px) {
  .landing-cover {
    height: 50vh;
  }

  .landing-title {
    font-size: 28px;
  }

  .video-wrapper {
    max-height: 65vh;
  }
}

/* ==========================================
   工具类
   ========================================== */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* ==========================================
   工具入口按钮（落地页）
   ========================================== */
.tools-entry {
  margin-top: 24px;
  padding: 12px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.tools-entry:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border-color: var(--color-primary);
}

/* ==========================================
   工具页面通用
   ========================================== */
.tools-container {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 40px;
}

.tools-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.tools-title {
  font-size: 18px;
  font-weight: 700;
}

.tools-tabs {
  display: flex;
  gap: 0;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tool-tab {
  flex: 1;
  padding: 14px 12px;
  background: none;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.tool-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tool-tab:hover {
  color: var(--color-text);
}

.tool-content {
  padding: 20px;
}

.tool-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
}

.tool-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* ==========================================
   标题库工具
   ========================================== */
.title-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.category-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.cat-btn {
  padding: 8px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
}

.cat-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.titles-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.title-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition);
}

.title-card:hover {
  border-color: var(--color-primary);
}

.title-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.title-id {
  font-size: 12px;
  color: var(--color-text-muted);
  font-family: monospace;
}

.title-ctr {
  font-size: 13px;
  color: var(--color-whatsapp);
  font-weight: 700;
}

.title-variant {
  display: flex;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.variant-a {
  background: rgba(255, 45, 85, 0.08);
  border-left: 3px solid var(--color-primary);
}

.variant-b {
  background: rgba(37, 211, 102, 0.08);
  border-left: 3px solid var(--color-whatsapp);
}

.variant-label {
  font-size: 18px;
  font-weight: 800;
  min-width: 24px;
  color: var(--color-text-muted);
}

.variant-a .variant-label { color: var(--color-primary); }
.variant-b .variant-label { color: var(--color-whatsapp); }

.variant-content strong {
  font-size: 14px;
  line-height: 1.4;
  display: block;
  margin-bottom: 4px;
}

.variant-content p {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.badge-preview {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.title-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 10px 0;
}

.tag {
  font-size: 11px;
  padding: 3px 10px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.title-actions {
  margin-top: 12px;
}

.btn-apply-title {
  width: 100%;
  padding: 10px;
  font-size: 14px;
  min-width: auto;
}

/* ==========================================
   剧本生成器工具
   ========================================== */
.script-gen-container {
  max-width: 100%;
}

.type-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.type-btn {
  padding: 10px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

.type-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

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

.random-btn {
  background: rgba(255, 45, 85, 0.15);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.script-output {
  margin-top: 16px;
}

.script-header {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.script-header h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.script-chars {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.script-chars span {
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.episode-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
}

.ep-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.ep-number {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-primary);
}

.ep-duration {
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.ep-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.ep-hook {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  padding: 8px;
  background: rgba(255, 45, 85, 0.06);
  border-radius: var(--radius-sm);
}

.ep-scenes {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.scene-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
}

.scene-num {
  min-width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.scene-desc {
  flex: 1;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.scene-emotion {
  font-size: 11px;
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.ep-cliffhanger {
  font-size: 14px;
  font-weight: 700;
  padding: 10px;
  background: rgba(255, 45, 85, 0.1);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.ep-tip {
  font-size: 12px;
  color: var(--color-text-muted);
  font-style: italic;
}

.btn-export {
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  font-size: 14px;
  min-width: auto;
}

/* ==========================================
   ROI计算器工具
   ========================================== */
.roi-container {
  max-width: 100%;
}

.roi-inputs {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.roi-input,
.roi-select {
  padding: 12px 14px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  transition: var(--transition);
}

.roi-input:focus,
.roi-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.15);
}

.roi-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23999' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.btn-calculate {
  width: 100%;
  margin-bottom: 24px;
  padding: 14px;
  font-size: 16px;
  min-width: auto;
}

/* ROI结果 */
.roi-result {
  margin-bottom: 32px;
}

.result-card {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.result-status {
  text-align: center;
  margin-bottom: 20px;
}

.status-text {
  font-size: 24px;
  font-weight: 800;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.metric-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.metric-value {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 11px;
  color: var(--color-text-muted);
}

.result-suggestions {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

.result-suggestions h4 {
  font-size: 15px;
  margin-bottom: 12px;
}

.suggestion-item {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  line-height: 1.4;
}

/* ROI历史 */
.roi-history {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

.roi-history h3 {
  font-size: 16px;
  margin-bottom: 16px;
}

.roi-history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.history-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-name {
  font-size: 13px;
  font-weight: 600;
}

.history-date {
  font-size: 11px;
  color: var(--color-text-muted);
}

.history-metrics {
  display: flex;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
}

.history-empty {
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
  padding: 20px;
}

.btn-clear-history {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 12px;
  margin-top: 12px;
  transition: var(--transition);
}

.btn-clear-history:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ==========================================
   工具页响应式
   ========================================== */
@media (max-width: 360px) {
  .title-stats {
    grid-template-columns: 1fr;
  }

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

  .type-selector {
    flex-direction: column;
  }

  .category-filter {
    flex-wrap: nowrap;
  }
}

@media (min-width: 481px) {
  .result-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================
   裂变增强系统样式
   ========================================== */

/* 裂变入口按钮 */
.fission-entry {
  margin-top: 12px;
  padding: 10px 18px;
  background: rgba(255, 165, 2, 0.1);
  border: 1px solid rgba(255, 165, 2, 0.3);
  border-radius: var(--radius-full);
  color: #ffa502;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.fission-entry:hover {
  background: rgba(255, 165, 2, 0.2);
  border-color: #ffa502;
}

/* 裂变弹窗 */
.fission-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.fission-popup.show {
  display: flex;
  animation: fadeIn 0.3s ease;
}

.fp-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.88);
}

.fp-container {
  position: relative;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  animation: slideUp 0.4s ease;
  z-index: 1;
}

.fp-close {
  position: absolute;
  top: 10px;
  right: 14px;
  font-size: 18px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: none;
  border: none;
}

.fp-close:hover {
  color: var(--color-text);
}

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

.fp-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.3;
}

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

.fp-reward {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 45, 85, 0.1);
  border: 1px solid rgba(255, 45, 85, 0.3);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--color-primary-light);
  font-weight: 600;
  margin-bottom: 18px;
}

.fp-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.btn-fp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  width: 100%;
}

.btn-whatsapp-fp {
  background: var(--color-whatsapp);
  color: white;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp-fp:hover {
  background: var(--color-whatsapp-dark);
  transform: translateY(-2px);
}

.btn-telegram-fp {
  background: #0088cc;
  color: white;
  box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3);
}

.btn-telegram-fp:hover {
  background: #006daa;
  transform: translateY(-2px);
}

.btn-copy-fp {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-copy-fp:hover {
  border-color: var(--color-text-muted);
}

/* 回落CTA按钮 */
.fp-continue {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 14px 20px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 4px;
  box-shadow: var(--shadow-btn);
}

.fp-continue:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.fp-skip {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 13px;
  padding: 10px;
  cursor: pointer;
  transition: var(--transition);
}

.fp-skip:hover {
  color: var(--color-text-secondary);
}

.fp-social-proof {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.fp-viewers {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* 裂变Toast通知 */
.fission-toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-whatsapp);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  z-index: 2000;
  transition: transform 0.4s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

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

.toast-icon {
  font-size: 24px;
}

.toast-text {
  font-size: 14px;
  font-weight: 600;
}

/* 社交证明浮动条 */
.social-proof-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(26, 26, 26, 0.95);
  border-top: 1px solid var(--color-border);
  padding: 8px 16px;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  z-index: 900;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-proof-bar.show {
  transform: translateY(0);
}

.sp-item {
  color: var(--color-text-secondary);
}

.sp-divider {
  margin: 0 8px;
  color: var(--color-text-muted);
}

/* ==========================================
   裂变结果页
   ========================================== */
.fission-page-container {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 40px;
}

.fission-page-header {
  padding: 12px 16px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.fission-result-content {
  padding: 20px;
}

.fission-result {
  max-width: 100%;
}

.fr-header {
  text-align: center;
  margin-bottom: 24px;
}

.fr-header h2 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
}

.fr-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* 裂变等级 */
.fr-level {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.fr-level-icon {
  font-size: 48px;
}

.fr-level-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.fr-level-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* 数据网格 */
.fr-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.fr-stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.fr-stat-icon {
  font-size: 24px;
  margin-bottom: 6px;
}

.fr-stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}

.fr-stat-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* K-Factor */
.fr-k-factor {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
}

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

.fr-k-value {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 6px;
}

.fr-k-explain {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* 分享链接区 */
.fr-share-section {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.fr-share-section h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

.fr-link-box {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.fr-link-input {
  flex: 1;
  padding: 10px 12px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 12px;
  font-family: monospace;
}

.fr-link-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.btn-copy-link {
  min-width: auto;
  padding: 10px 16px;
  font-size: 13px;
}

.fr-share-buttons {
  display: flex;
  gap: 10px;
}

.fr-share-buttons .btn-fp {
  flex: 1;
}

/* ==========================================
   裂变响应式
   ========================================== */
@media (max-width: 360px) {
  .fp-container {
    padding: 22px 16px;
  }

  .fp-title {
    font-size: 18px;
  }

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

  .fr-level {
    flex-direction: column;
    text-align: center;
  }
}