/* ============================================
   香WAN Brand Website - Global Stylesheet
   Brand: 香WAN | Slogan: 香即万象
   Visual: 新中式极简 - 暖米白 + 深褐黑 + 弧线
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Brand Colors */
  --c-bg-primary: #F4ECE3;     /* 暖米白 - 背景主色 */
  --c-bg-card: #F7F2EA;        /* 浅米白 - 卡片/高光 */
  --c-bg-warm-gray: #E8DDD3;   /* 暖灰 - 分隔/过渡 */
  --c-text-primary: #3A2E28;   /* 深褐黑 - 文字主色 */
  --c-text-secondary: #7D6758; /* 温润木棕 - 次要文字 */
  --c-sage: #8A9B82;           /* 鼠尾草绿 */
  --c-olive: #6B7358;          /* 橄榄绿 */
  --c-brown: #7D6758;          /* 温润木棕 */
  --c-gold: #C4A77D;           /* 淡金 */
  --c-gold-light: #D4B98D;     /* 浅淡金 */
  --c-line: #D4C9BC;           /* 分割线色 */

  /* Typography */
  --font-cn: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-en: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --font-sans-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
  --radius: 4px;
  --radius-lg: 12px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-cn);
  background-color: var(--c-bg-primary);
  color: var(--c-text-primary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 400;
  letter-spacing: 0.05em;
}

.font-en {
  font-family: var(--font-en);
  font-style: italic;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: rgba(244, 236, 227, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--c-line);
}

/* Logo Variant 3: 香 + arc + WAN (horizontal, for nav) */
.nav-logo {
  display: inline-flex;
  align-items: flex-end;
  gap: 0.35em;
  position: relative;
  color: var(--c-text-primary);
  line-height: 1;
  padding-bottom: 0.55em;
}

.nav-logo .logo-xiang {
  font-family: var(--font-cn);
  font-size: 1.5rem;
  font-weight: 400;
}

.nav-logo .logo-wan {
  font-family: var(--font-en);
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-bottom: 0.18em;
}

.nav-logo .logo-arc {
  position: absolute;
  bottom: 0;
  left: -0.15em;
  width: 2.1em;
  height: 0.4em;
  border-bottom: 1.5px solid currentColor;
  border-radius: 0 0 50% 50% / 0 0 100% 100%;
  pointer-events: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

.nav-menu a {
  font-size: 0.95rem;
  color: var(--c-text-primary);
  position: relative;
  padding: 0.25rem 0;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-gold);
  transition: width var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-menu a:hover {
  color: var(--c-gold);
}

.nav-lang {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--c-text-secondary);
  cursor: pointer;
  user-select: none;
}

.nav-lang span.active {
  color: var(--c-text-primary);
  font-weight: 500;
}

.nav-lang span:hover {
  color: var(--c-gold);
}

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

.nav-toggle span {
  width: 24px;
  height: 1.5px;
  background: var(--c-text-primary);
  transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom,
    rgba(244, 236, 227, 0.3) 0%,
    rgba(244, 236, 227, 0.5) 50%,
    rgba(244, 236, 227, 0.8) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  padding: 0 var(--space-md);
}

.hero-slogan {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: 0.3em;
  margin-bottom: var(--space-md);
  color: var(--c-text-primary);
}

.hero-tagline {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--c-text-secondary);
  margin-bottom: var(--space-lg);
}

.hero-tagline .line {
  display: block;
}


.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: var(--c-text-secondary);
  letter-spacing: 0.2em;
  animation: bounce 2s infinite;
  z-index: 2;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* --- Three Emotion Lanes --- */
.lanes {
  padding: var(--space-xl) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-title h2 {
  font-size: 1.8rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-xs);
}

.section-title .en {
  font-family: var(--font-en);
  font-size: 1rem;
  color: var(--c-gold);
  font-style: italic;
}


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

.lane-card {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  background: var(--c-bg-card);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.lane-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(58, 46, 40, 0.08);
}

.lane-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-sm);
  color: var(--c-sage);
}

.lane-icon svg {
  width: 100%;
  height: 100%;
}

.lane-title {
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xs);
}

.lane-desc {
  font-size: 0.9rem;
  color: var(--c-text-secondary);
  line-height: 1.8;
}

/* --- Brand Story Summary --- */
.story-summary {
  padding: var(--space-xl) var(--space-lg);
  background: var(--c-bg-card);
}

.story-summary-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.story-summary p {
  font-size: 1.05rem;
  line-height: 2.2;
  color: var(--c-text-primary);
  margin-bottom: var(--space-md);
}

.story-link {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: 0.6rem 2rem;
  border: 1px solid var(--c-gold);
  border-radius: var(--radius);
  color: var(--c-text-primary);
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  transition: background var(--transition), color var(--transition);
}

.story-link:hover {
  background: var(--c-gold);
  color: var(--c-bg-primary);
}

/* --- Footer --- */
.footer {
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  text-align: center;
  border-top: 1px solid var(--c-line);
  background: var(--c-bg-primary);
}

/* Logo Variant 1: 香 + arc + WAN (vertical, for footer) */
.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15em;
  color: var(--c-text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1;
}

.footer-logo .logo-xiang {
  font-family: var(--font-cn);
  font-size: 1.6rem;
  font-weight: 400;
}

.footer-logo .logo-wan {
  font-family: var(--font-en);
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.footer-logo .logo-arc {
  width: 2.6em;
  height: 0.7em;
  border-bottom: 1.5px solid currentColor;
  border-radius: 0 0 50% 50% / 0 0 100% 100%;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--c-text-secondary);
  line-height: 1.8;
}

.footer-text a {
  color: var(--c-text-secondary);
}

.footer-text a:hover {
  color: var(--c-gold);
}

/* --- Page Header (sub-pages) --- */
.page-header {
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-lg) var(--space-lg);
  text-align: center;
  background: var(--c-bg-card);
}

.page-header h1 {
  font-size: 2.2rem;
  letter-spacing: 0.25em;
  margin-bottom: var(--space-xs);
}

.page-header .en {
  font-family: var(--font-en);
  font-size: 1.1rem;
  color: var(--c-gold);
  font-style: italic;
}


/* --- Brand Story Page --- */
.story-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-lg) var(--space-xl);
}

.story-content h2 {
  font-size: 1.6rem;
  letter-spacing: 0.15em;
  text-align: center;
  margin-bottom: var(--space-md);
}

.story-content p {
  font-size: 1.05rem;
  line-height: 2.2;
  margin-bottom: var(--space-md);
  text-align: center;
}

.story-content .story-poem {
  font-size: 1.15rem;
  line-height: 2.5;
  color: var(--c-text-secondary);
  text-align: center;
  margin: var(--space-lg) 0;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.story-section {
  margin-bottom: var(--space-xl);
}

.story-section-title {
  font-size: 1.3rem;
  letter-spacing: 0.15em;
  color: var(--c-gold);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.brand-formula {
  text-align: center;
  padding: var(--space-md);
  background: var(--c-bg-card);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
}

.brand-formula .formula {
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--c-text-primary);
}

/* --- Visual System Page --- */
.visual-gallery {
  padding: var(--space-lg) var(--space-lg) var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

.carousel {
  position: relative;
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg-card);
}

.carousel-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.carousel-slide {
  min-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.carousel-slide img {
  width: 100%;
  max-height: 700px;
  object-fit: contain;
  background: var(--c-bg-card);
}

.carousel-caption {
  padding: var(--space-sm) var(--space-md);
  text-align: center;
}

.carousel-caption .title {
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.carousel-caption .desc {
  font-size: 0.85rem;
  color: var(--c-text-secondary);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  background: rgba(247, 242, 234, 0.9);
  color: var(--c-text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
  z-index: 5;
}

.carousel-btn:hover {
  background: var(--c-gold);
  color: var(--c-bg-primary);
  border-color: var(--c-gold);
}

.carousel-btn.prev { left: var(--space-sm); }
.carousel-btn.next { right: var(--space-sm); }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: var(--space-sm) 0;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-line);
  cursor: pointer;
  transition: background var(--transition);
}

.carousel-dot.active {
  background: var(--c-gold);
}

/* Color Palette */
.color-palette {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-lg) var(--space-xl);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-sm);
}

.palette-item {
  text-align: center;
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition);
}

.palette-item:hover {
  transform: translateY(-2px);
}

.palette-swatch {
  width: 100%;
  height: 100px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.palette-info {
  padding: var(--space-xs);
  background: var(--c-bg-card);
  border-radius: 0 0 var(--radius) var(--radius);
}

.palette-name {
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.palette-hex {
  font-size: 0.75rem;
  color: var(--c-text-secondary);
  font-family: var(--font-en);
}

/* --- Placeholder Page (framework) --- */
.placeholder {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.placeholder-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  color: var(--c-sage);
  opacity: 0.5;
}

.placeholder-icon svg {
  width: 100%;
  height: 100%;
}

.placeholder-title {
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-sm);
}

.placeholder-desc {
  font-size: 1rem;
  color: var(--c-text-secondary);
  max-width: 400px;
  line-height: 2;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --space-xl: 4rem;
    --space-lg: 2rem;
  }

  .nav {
    padding: 0 var(--space-sm);
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--c-bg-primary);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
    border-bottom: 1px solid var(--c-line);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

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

  .lanes-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .hero-slogan {
    letter-spacing: 0.15em;
  }

  .story-content p {
    text-align: left;
  }

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

@media (max-width: 480px) {
  .hero-tagline {
    font-size: 0.95rem;
  }

  .lane-card {
    padding: var(--space-md) var(--space-sm);
  }
}