/* ========================================
   光屿 · Radiant Island — 主样式表
   心理咨询与培训平台
   设计基调：温暖 · 专业 · 宁静
   ======================================== */

/* ----- Google Fonts ----- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&display=swap');

/* ========================================
   CSS 变量
   ======================================== */
:root {
  /* 主色调 — 温暖琥珀/金色 */
  --color-primary: #b8860b;
  --color-primary-light: #d4a745;
  --color-primary-dark: #8b6508;
  --color-primary-bg: rgba(184, 134, 11, 0.08);

  /* 强调色 — 柔和珊瑚 */
  --color-accent: #c17f59;
  --color-accent-light: #d9a98a;
  --color-accent-bg: rgba(193, 127, 89, 0.1);

  /* 中性色 */
  --color-text: #2c2416;
  --color-text-light: #6b5e4a;
  --color-text-muted: #9b8e7a;
  --color-bg: #fdfaf5;
  --color-bg-alt: #f7f1e8;
  --color-bg-card: #ffffff;
  --color-border: #e8dfd0;
  --color-border-light: #f0e8d8;

  /* 深色强调 */
  --color-dark: #1a1814;
  --color-dark-bg: #1f1c16;

  /* 功能色 */
  --color-success: #5a8f6c;
  --color-error: #c4554d;

  /* 排版 */
  --font-serif: 'Noto Serif SC', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(44, 36, 22, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 36, 22, 0.08);
  --shadow-lg: 0 8px 32px rgba(44, 36, 22, 0.1);
  --shadow-xl: 0 16px 48px rgba(44, 36, 22, 0.12);

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.75;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-dark);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
h4 { font-size: 1.15rem; }

p {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

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

a:hover {
  color: var(--color-primary-dark);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.85rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(184, 134, 11, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184, 134, 11, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(253, 250, 245, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(253, 250, 245, 0.95);
  box-shadow: var(--shadow-sm);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-dark);
}

.navbar-brand svg {
  width: 36px;
  height: 36px;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.navbar-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  position: relative;
  padding: var(--space-xs) 0;
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.navbar-links a:hover::after,
.navbar-links a.active::after {
  width: 100%;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-primary);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  background: linear-gradient(170deg, 
    var(--color-bg) 0%, 
    var(--color-bg-alt) 40%, 
    rgba(193, 127, 89, 0.06) 70%, 
    var(--color-bg) 100%
  );
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(184, 134, 11, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(193, 127, 89, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.04em;
  line-height: 1.15;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--color-text-light);
  margin-bottom: var(--space-2xl);
  font-weight: 300;
  font-style: italic;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  animation: float 2s ease-in-out infinite;
}

.scroll-indicator svg {
  width: 20px;
  height: 20px;
  opacity: 0.6;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   Section 通用
   ======================================== */
.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: var(--space-xs) var(--space-lg);
  border-radius: 50px;
  margin-bottom: var(--space-md);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ========================================
   About Section
   ======================================== */
.about {
  background: var(--color-bg-card);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-slow);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ========================================
   Masters Section
   ======================================== */
.masters {
  background: var(--color-bg-alt);
}

.masters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.master-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

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

.master-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-border-light));
}

.master-info {
  padding: var(--space-xl);
}

.master-info h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

.master-title {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.master-bio {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.master-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.master-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  border-radius: 50px;
  font-weight: 500;
}

/* ========================================
   Courses Section
   ======================================== */
.courses {
  background: var(--color-bg-card);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

.course-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.course-level {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.75rem;
  border-radius: 50px;
  margin-bottom: var(--space-md);
  width: fit-content;
}

.course-level.beginner {
  background: rgba(90, 143, 108, 0.12);
  color: var(--color-success);
}

.course-level.intermediate {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

.course-level.advanced {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

.course-card h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
}

.course-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-lg);
}

.course-meta {
  display: flex;
  gap: var(--space-lg);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.course-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ========================================
   Quote Section
   ======================================== */
.quote {
  background: linear-gradient(135deg, var(--color-dark-bg), #2a2418);
  color: #fff;
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.quote::before {
  content: '"';
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-serif);
  font-size: 16rem;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  pointer-events: none;
}

.quote blockquote {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.quote blockquote p {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-style: italic;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.quote blockquote cite {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-style: normal;
  color: var(--color-accent-light);
  font-weight: 500;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
  background: var(--color-bg-alt);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-item h4 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-xs);
}

.contact-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* 表单 */
.contact-form-wrapper {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}

.form-title {
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

.form-subtitle {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.form-group {
  position: relative;
  margin-bottom: var(--space-lg);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-group label {
  position: absolute;
  top: -10px;
  left: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-bg-card);
  padding: 0 var(--space-sm);
  pointer-events: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
}

.form-note {
  text-align: center;
  font-size: 0.82rem;
  margin-top: var(--space-md);
  margin-bottom: 0;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-dark-bg);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.88rem;
  margin-top: var(--space-md);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: #fff;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-col h5 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-md);
}

.footer-col a,
.footer-col p {
  display: block;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-lg);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: 0;
}

/* ========================================
   动画
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 交错延迟 */
.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; }

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  :root {
    --space-4xl: 4rem;
    --space-3xl: 2.5rem;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .navbar-links {
    display: none;
  }

  .hero {
    min-height: 90vh;
  }

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

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }

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

  .masters-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

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

  .section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: var(--space-lg);
  }
}