/* =================================
   YiFinding - 赛博东方设计系统
   ================================= */

/* ========== CSS Variables ========== */
:root {
  /* 颜色系统 - 赛博东方配色 */
  --color-deep-blue: #0a1428;
  /* 深玄青色 */
  --color-midnight: #1a2332;
  /* 午夜蓝 */
  --color-dark-navy: #243447;
  /* 暗藏青 */
  --color-gold: #d4af37;
  /* 流金 */
  --color-gold-light: #f0d98c;
  /* 浅金 */
  --color-gold-dark: #9d7f2a;
  /* 深金 */
  --color-teal: #4a9d9c;
  /* 青绿 */
  --color-white: #f5f5f5;
  /* 月白 */
  --color-text-primary: #e8e8e8;
  /* 主文本 */
  --color-text-secondary: #b0b0b0;
  /* 次文本 */
  --color-success: #52c41a;
  /* 成功绿 */
  --color-warning: #faad14;
  /* 警告黄 */
  --color-danger: #ff4d4f;
  /* 危险红 */

  /* 玻璃拟态 */
  --glass-bg: rgba(26, 35, 50, 0.7);
  --glass-border: rgba(212, 175, 55, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(10, 20, 40, 0.37);
  --glass-backdrop: blur(8px);

  /* 间距系统 */
  --spacing-xs: 0.5rem;
  /* 8px */
  --spacing-sm: 1rem;
  /* 16px */
  --spacing-md: 1.5rem;
  /* 24px */
  --spacing-lg: 2rem;
  /* 32px */
  --spacing-xl: 3rem;
  /* 48px */
  --spacing-2xl: 4rem;
  /* 64px */

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', 'STSong', 'SimSun', serif;

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index层级 */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal: 40;
  --z-popover: 50;
  --z-tooltip: 60;
}

/* ========== Global Styles ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--color-deep-blue) 0%, var(--color-midnight) 50%, var(--color-dark-navy) 100%);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 动态背景效果 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(74, 157, 156, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
  animation: backgroundPulse 15s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes backgroundPulse {

  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 1;
  }
}

/* ========== Typography ========== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gold-light);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1rem;
}

h6 {
  font-size: 0.875rem;
}

p {
  margin-bottom: var(--spacing-sm);
}

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

a:hover {
  color: var(--color-gold-light);
}

/* ========== Layout ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: var(--z-base);
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

/* ========== 玻璃拟态卡片 ========== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 8px 40px 0 rgba(212, 175, 55, 0.2);
  transform: translateY(-2px);
}

/* ========== 按钮系统 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  color: var(--color-deep-blue);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--color-gold);
  color: var(--color-gold);
}

.btn-secondary:hover {
  background: var(--color-gold);
  color: var(--color-deep-blue);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

/* ========== 输入框系统 ========== */
.input-group {
  margin-bottom: var(--spacing-md);
}

.input-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--color-gold-light);
  font-weight: 500;
}

.input-field {
  width: 100%;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.input-field:focus {
  outline: none;
  border-color: var(--color-gold);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.input-field::placeholder {
  color: var(--color-text-secondary);
}

select.input-field {
  cursor: pointer;
}

/* ========== Header ========== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(10, 20, 40, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--spacing-md) 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gold);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  font-size: 2rem;
}

.lang-switcher {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-sm);
  color: var(--color-gold);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switcher:hover {
  background: var(--color-gold);
  color: var(--color-deep-blue);
}

/* ========== Hero Section ========== */
.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--spacing-xl) 0;
}

.hero-background {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  animation: compassRotate 30s linear infinite;
  pointer-events: none;
}

@keyframes compassRotate {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.hero-content {
  text-align: center;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {

  0%,
  100% {
    opacity: 0.9;
  }

  50% {
    opacity: 1;
  }
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.hero-input-container {
  margin-top: var(--spacing-xl);
  position: relative;
}

.hero-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1.125rem;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-xl);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
}

.hero-input:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.2);
}

/* ========== Form System ========== */
.form-container {
  max-width: 700px;
  margin: var(--spacing-md) auto var(--spacing-xl);
}

.form-step {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-slow);
}

.form-step.active {
  opacity: 1;
  max-height: 1000px;
  margin-bottom: var(--spacing-lg);
}

.form-step-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.form-step-icon {
  font-size: 1.5rem;
}

.form-step-title {
  font-size: 1.25rem;
  color: var(--color-gold);
}

.form-step-number {
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.color-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.color-option {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.color-option:hover {
  transform: scale(1.1);
  border-color: var(--color-gold);
}

.color-option.selected {
  border-color: var(--color-gold);
  box-shadow: 0 0 16px var(--color-gold);
}

.color-option.selected::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  text-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
}

.material-options,
.jianxing-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.option-btn {
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.option-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-gold);
}

.option-btn.selected {
  background: var(--color-gold);
  color: var(--color-deep-blue);
  border-color: var(--color-gold);
}

/* ========== Progress Bar ========== */
.progress-container {
  margin: var(--spacing-xl) 0;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-gold-light) 100%);
  border-radius: 3px;
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* ========== Koi Advisor Floating Window ========== */
.koi-advisor {
  position: fixed;
  right: var(--spacing-md);
  bottom: var(--spacing-md);
  width: 340px;
  z-index: var(--z-fixed);
}

.koi-advisor.minimized .advisor-content {
  display: none;
}

.advisor-header {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.advisor-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-teal) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  animation: koiBreath 3s ease-in-out infinite;
}

@keyframes koiBreath {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

.advisor-title {
  flex: 1;
  font-weight: 600;
  color: var(--color-gold);
}

.advisor-toggle {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.advisor-toggle:hover {
  color: var(--color-gold);
}

.advisor-content {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: var(--spacing-md);
  max-height: 400px;
  overflow-y: auto;
}

.advisor-message {
  background: rgba(212, 175, 55, 0.1);
  border-left: 3px solid var(--color-gold);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========== Features Section ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gold);
}

.feature-description {
  color: var(--color-text-secondary);
  font-weight: 600;
}

.logo-slogan {
  display: inline-block;
}

/* ========== Cases Section ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.case-card {
  padding: var(--spacing-lg);
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--glass-border);
}

.case-number {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.case-status {
  background: var(--color-success);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.case-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gold-light);
}

.case-details {
  margin: var(--spacing-md) 0;
}

.case-detail-item {
  display: flex;
  padding: var(--spacing-xs) 0;
  font-size: 0.9rem;
}

.case-detail-label {
  color: var(--color-text-secondary);
  min-width: 80px;
}

.case-detail-value {
  color: var(--color-text-primary);
}

.case-result {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: rgba(82, 196, 26, 0.1);
  border-left: 3px solid var(--color-success);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-xl) 0;
  text-align: center;
  margin-top: var(--spacing-2xl);
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-note {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-gold);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ========== Loading Animation ========== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 20, 40, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.loading-compass {
  width: 200px;
  height: 200px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: compassSpin 2s linear infinite;
  position: relative;
}

.loading-compass::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  border: 2px solid var(--glass-border);
  border-right-color: var(--color-teal);
  border-radius: 50%;
  animation: compassSpin 1.5s linear infinite reverse;
}

@keyframes compassSpin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.loading-text {
  margin-top: var(--spacing-lg);
  font-size: 1.125rem;
  color: var(--color-gold);
  animation: textPulse 2s ease-in-out infinite;
}

@keyframes textPulse {

  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 1;
  }
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .koi-advisor {
    width: calc(100% - var(--spacing-lg));
    right: var(--spacing-sm);
    bottom: var(--spacing-sm);
  }

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

  .header-content {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  .logo-slogan {
    display: none;
  }

  .form-container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .color-picker {
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  }

  .material-options,
  .jianxing-options {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }

  .btn-large {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
  }
}

/* ========== Utility Classes ========== */
.hidden {
  display: none !important;
}

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

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-danger {
  color: var(--color-danger);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}