/* ========================================
   China Retreat & Wellness — Design System
   ======================================== */

/* --- Custom Properties --- */
:root {
    /* Color Palette — Warm natural tones inspired by China */
    --ivory: #F5F0E8;
    --ivory-light: #FAF7F2;
    --clay: #C4A882;
    --clay-light: #D4BFA0;
    --tea-brown: #8B7355;
    --tea-dark: #6B5A42;
    --ink: #2C2825;
    --ink-light: #4A4541;
    --moss: #7A8B6F;
    --moss-light: #9AAD8F;
    --gold: #B8A07A;
    --gold-muted: #A89070;
    --white: #FFFFFF;
    --warm-white: #FDFBF8;
    --border: rgba(139, 115, 85, 0.15);
    --border-light: rgba(139, 115, 85, 0.08);

    /* Typography */
    --font-serif: 'Playfair Display', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    --space-4xl: 12rem;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
    --duration-fast: 0.3s;
    --duration-medium: 0.6s;
    --duration-slow: 1s;
    --duration-slower: 1.5s;

    /* Layout */
    --nav-height: 80px;
    --container-max: 1400px;
    --container-padding: 2rem;
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--ink);
    background: var(--ivory-light);
    line-height: 1.7;
    font-weight: 300;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

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

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* --- Typography --- */
.section-number {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    color: var(--clay);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--tea-brown);
    max-width: 600px;
    line-height: 1.8;
    font-weight: 300;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--ink);
    color: var(--ivory);
    border: 1px solid var(--ink);
}

.btn-primary:hover {
    background: var(--tea-dark);
    border-color: var(--tea-dark);
}

.btn-secondary {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--ink);
}

.btn-secondary:hover {
    background: var(--ink);
    color: var(--ivory);
}

.btn-outline {
    background: transparent;
    color: var(--tea-brown);
    border: 1px solid var(--clay);
}

.btn-outline:hover {
    background: var(--tea-brown);
    color: var(--ivory);
    border-color: var(--tea-brown);
}

/* On dark backgrounds */
.section-cta .btn-primary {
    background: var(--ivory);
    color: var(--ink);
    border-color: var(--ivory);
}

.section-cta .btn-primary:hover {
    background: var(--white);
}

.section-cta .btn-secondary {
    color: var(--ivory);
    border-color: var(--ivory);
}

.section-cta .btn-secondary:hover {
    background: var(--ivory);
    color: var(--ink);
}

/* ========================================
   Preloader
   ======================================== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--ivory);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s var(--ease-out), visibility 0.8s;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

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

.preloader-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    letter-spacing: 0.15em;
    color: var(--ink);
    margin-bottom: 1.5rem;
}

.preloader-line {
    width: 60px;
    height: 1px;
    background: var(--clay);
    margin: 0 auto;
    transform: scaleX(0);
    animation: preloaderLine 1.5s var(--ease-out) forwards;
}

@keyframes preloaderLine {
    to { transform: scaleX(1); }
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--duration-medium) var(--ease-out);
}

.nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(245, 240, 232, 0);
    backdrop-filter: blur(0);
    transition: all var(--duration-medium) var(--ease-out);
}

.nav.scrolled::before {
    background: rgba(245, 240, 232, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--border-light);
}

.nav-inner {
    position: relative;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    z-index: 1001;
}

.nav-logo-cn {
    font-family: var(--font-serif);
    font-size: 1rem;
    letter-spacing: 0.2em;
    color: var(--ink);
    display: none !important;
}

.nav-logo-en {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--tea-brown);
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-light);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--tea-brown);
    transition: width var(--duration-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
    color: var(--ink);
}

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

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-btn-login {
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tea-brown);
}

.nav-btn-register {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--clay);
    color: var(--tea-dark);
    transition: all var(--duration-fast) var(--ease-out);
}

.nav-btn-register:hover {
    background: var(--tea-dark);
    color: var(--ivory);
    border-color: var(--tea-dark);
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    z-index: 1001;
    padding: 8px;
}

.nav-hamburger span {
    width: 24px;
    height: 1px;
    background: var(--ink);
    transition: all var(--duration-fast) var(--ease-out);
}

.nav-hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* Hero nav text color */
.hero .nav-link,
.hero .nav-logo-cn {
    color: var(--white);
    text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

.hero .nav-logo-en {
    color: rgba(255,255,255,0.95);
    text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

.hero .nav-link {
    color: rgba(255,255,255,0.85);
}

.hero .nav-link:hover,
.hero .nav-link.active {
    color: var(--white);
}

.hero .nav-btn-login {
    color: rgba(255,255,255,0.85);
}

.hero .nav-btn-register {
    border-color: rgba(255,255,255,0.4);
    color: var(--white);
}

.hero .nav-btn-register:hover {
    background: var(--white);
    color: var(--ink);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--ivory);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-medium) var(--ease-out);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-inner {
    text-align: center;
}

.mobile-menu-link {
    display: block;
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--ink);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--duration-fast) var(--ease-out);
}

.mobile-menu.active .mobile-menu-link {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu.active .mobile-menu-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .mobile-menu-link:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.active .mobile-menu-link:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.active .mobile-menu-link:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.active .mobile-menu-link:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu.active .mobile-menu-link:nth-child(7) { transition-delay: 0.4s; }
.mobile-menu.active .mobile-menu-link:nth-child(8) { transition-delay: 0.45s; }

.mobile-menu-divider {
    width: 40px;
    height: 1px;
    background: var(--clay);
    margin: 2rem auto;
    opacity: 0;
    transition: opacity 0.3s 0.35s;
}

.mobile-menu.active .mobile-menu-divider {
    opacity: 1;
}

/* Mobile menu — Travel Guide submenu */
.mobile-menu-group {
    margin-bottom: 1.5rem;
}

.mobile-menu-group .mobile-menu-link {
    margin-bottom: 0.75rem;
}

.mobile-menu-sub {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--duration-medium) var(--ease-out),
                opacity var(--duration-fast) var(--ease-out);
}

.mobile-menu-group.open .mobile-menu-sub {
    max-height: 320px;
    opacity: 1;
}

.mobile-menu-sublink {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    color: var(--tea-brown);
    margin-bottom: 0.6rem;
    padding: 0.25rem 0;
}

.mobile-menu-sublink:hover {
    color: var(--ink);
}

.mobile-menu-toggle::after {
    content: '+';
    display: inline-block;
    margin-left: 0.5rem;
    font-weight: 300;
    transition: transform var(--duration-fast) var(--ease-out);
}

.mobile-menu-group.open .mobile-menu-toggle::after {
    content: '−';
}

/* ========================================
   Hero
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity 1.5s var(--ease-out), transform 8s var(--ease-out);
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(44, 40, 37, 0.3) 0%,
        rgba(44, 40, 37, 0.15) 40%,
        rgba(44, 40, 37, 0.4) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 0 var(--container-padding);
    max-width: 900px;
}

.hero-eyebrow {
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    opacity: 0.8;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
}

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

.hero-title-line:last-child {
    font-style: italic;
    font-weight: 400;
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.8;
    opacity: 0.85;
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.hero .btn-primary {
    background: var(--white);
    color: var(--ink);
    border-color: var(--white);
}

.hero .btn-primary:hover {
    background: var(--ivory);
}

.hero .btn-secondary {
    color: var(--white);
    border-color: rgba(255,255,255,0.5);
}

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

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    opacity: 0.6;
}

.hero-scroll span {
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.hero-scroll-line {
    width: 1px;
    height: 40px;
    background: var(--white);
    animation: scrollLine 2s var(--ease-in-out) infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Animate in */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

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

.hero-content .animate-in:nth-child(1) { transition-delay: 0.3s; }
.hero-content .animate-in:nth-child(2) { transition-delay: 0.5s; }
.hero-content .animate-in:nth-child(3) { transition-delay: 0.7s; }
.hero-content .animate-in:nth-child(4) { transition-delay: 0.9s; }
.hero-content .animate-in:nth-child(5) { transition-delay: 1.1s; }

/* ========================================
   Section — Intro
   ======================================== */
.section {
    position: relative;
}

.section-intro {
    padding: var(--space-4xl) 0;
    background: var(--ivory-light);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
    align-items: start;
}

.intro-left {
    position: sticky;
    top: calc(var(--nav-height) + 2rem);
}

.intro-text {
    font-size: 1.125rem;
    line-height: 1.9;
    color: var(--ink-light);
    margin-bottom: var(--space-md);
}

.intro-layers {
    display: grid;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.intro-layer {
    display: grid;
    grid-template-columns: 50px 1fr;
    grid-template-rows: auto auto;
    gap: 0 var(--space-md);
}

.intro-layer-icon {
    grid-row: span 2;
    width: 50px;
    height: 50px;
    color: var(--clay);
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-layer h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.intro-layer p {
    font-size: 0.9375rem;
    color: var(--tea-brown);
    line-height: 1.7;
}

/* ========================================
   Section — Dimensions
   ======================================== */
.section-dimensions {
    padding: var(--space-4xl) 0;
    position: relative;
    overflow: hidden;
}

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

.section-dimensions-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.06;
}

.section-dimensions .container {
    position: relative;
    z-index: 1;
}

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

.dimensions-header .section-subtitle {
    margin: 0 auto;
}

.dimensions-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.dimension-card {
    background: var(--warm-white);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    transition: all var(--duration-medium) var(--ease-out);
    position: relative;
    cursor: pointer;
}

.dimension-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--clay);
    transform: scaleX(0);
    transition: transform var(--duration-medium) var(--ease-out);
}

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

.dimension-card:hover {
    background: var(--white);
}

.dimension-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--clay-light);
    display: block;
    margin-bottom: var(--space-md);
}

.dimension-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.dimension-result {
    font-size: 0.9375rem;
    color: var(--tea-brown);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    min-height: 3.4em;
}

.dimension-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.dimension-tags span {
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.625rem;
    border: 1px solid var(--border);
    color: var(--tea-brown);
    border-radius: 2px;
}

.dimension-link {
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tea-dark);
    transition: color var(--duration-fast);
}

.dimension-link:hover {
    color: var(--ink);
}

/* ========================================
   Section — Destinations
   ======================================== */
.section-destinations {
    padding: var(--space-4xl) 0;
    background: var(--warm-white);
}

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

.destinations-header .section-subtitle {
    margin: 0 auto;
}

.destinations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: var(--space-2xl);
}

.destination-card {
    position: relative;
    overflow: hidden;
    display: block;
    aspect-ratio: 4/5;
}

.destination-card-large {
    grid-column: span 2;
    aspect-ratio: 8/5;
}

.destination-card-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.destination-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slower) var(--ease-out);
}

.destination-card:hover .destination-card-img img {
    transform: scale(1.05);
}

.destination-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--space-xl) var(--space-lg);
    background: linear-gradient(to top, rgba(44, 40, 37, 0.7) 0%, transparent 100%);
    color: var(--white);
}

.destination-card-tags {
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.7;
    display: block;
    margin-bottom: 0.5rem;
}

.destination-card-content h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.destination-card-content p {
    font-size: 0.9375rem;
    opacity: 0.8;
    line-height: 1.6;
    max-width: 400px;
}

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

/* ========================================
   Section — Interlude
   ======================================== */
.section-interlude {
    position: relative;
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.interlude-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.interlude-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 0 var(--container-padding);
}

.interlude-quote p {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 400;
    font-style: italic;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

/* ========================================
   Section — Products
   ======================================== */
.section-products {
    padding: var(--space-4xl) 0;
    background: var(--ivory-light);
}

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

.products-header .section-subtitle {
    margin: 0 auto;
}

.products-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: var(--space-2xl);
    border-bottom: 1px solid var(--border);
}

.products-tab {
    font-family: var(--font-serif);
    font-size: 1rem;
    padding: var(--space-sm) var(--space-lg);
    color: var(--tea-brown);
    position: relative;
    transition: color var(--duration-fast);
}

.products-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--tea-dark);
    transform: scaleX(0);
    transition: transform var(--duration-fast) var(--ease-out);
}

.products-tab.active,
.products-tab:hover {
    color: var(--ink);
}

.products-tab.active::after {
    transform: scaleX(1);
}

.product-panel {
    display: none;
}

.product-panel.active {
    display: block;
    animation: fadeIn 0.5s var(--ease-out);
}

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

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.product-card {
    background: var(--white);
    overflow: hidden;
    display: grid;
    grid-template-columns: 280px 1fr;
    transition: all var(--duration-medium) var(--ease-out);
    border: 1px solid var(--border-light);
}

.product-card:hover {
    box-shadow: 0 20px 60px rgba(44, 40, 37, 0.08);
}

.product-card-img {
    overflow: hidden;
}

.product-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slower) var(--ease-out);
}

.product-card:hover .product-card-img img {
    transform: scale(1.05);
}

.product-card-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}

.product-card-content h3 {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.product-card-content p {
    font-size: 0.9375rem;
    color: var(--tea-brown);
    line-height: 1.7;
    margin-bottom: auto;
}

.product-benefits {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: var(--space-md);
}

.product-benefits span {
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.625rem;
    background: var(--ivory);
    color: var(--tea-brown);
    border-radius: 2px;
}

.products-cta {
    text-align: center;
    margin-top: var(--space-2xl);
}

/* ========================================
   Section — Prepare
   ======================================== */
.section-prepare {
    background: var(--warm-white);
}

.prepare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 80vh;
}

.prepare-left {
    overflow: hidden;
}

.prepare-left img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.prepare-right {
    padding: var(--space-3xl) var(--space-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.prepare-text {
    font-size: 1.125rem;
    color: var(--ink-light);
    line-height: 1.9;
    margin-bottom: var(--space-xl);
}

.prepare-categories {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.prepare-category {
    padding-left: var(--space-md);
    border-left: 2px solid var(--clay-light);
}

.prepare-category h4 {
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
}

.prepare-category p {
    font-size: 0.875rem;
    color: var(--tea-brown);
    line-height: 1.7;
}

/* ========================================
   Section — Fellow
   ======================================== */
.section-fellow {
    padding: var(--space-4xl) 0;
    background: var(--ivory-light);
}

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

.fellow-tagline {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    font-style: italic;
    color: var(--tea-dark);
    margin-bottom: var(--space-lg);
}

.fellow-text {
    font-size: 1.0625rem;
    color: var(--ink-light);
    line-height: 1.9;
    margin-bottom: var(--space-xl);
}

.fellow-stages {
    display: grid;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.fellow-stage {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.fellow-stage-label {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tea-dark);
    letter-spacing: 0.02em;
}

.fellow-stage p {
    font-size: 0.9375rem;
    color: var(--tea-brown);
    line-height: 1.7;
}

.fellow-image {
    overflow: hidden;
}

.fellow-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    max-height: 600px;
}

/* ========================================
   Section — Gallery
   ======================================== */
.section-gallery {
    padding: var(--space-4xl) 0 var(--space-2xl);
    background: var(--ivory-light);
    overflow: hidden;
}

.gallery-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: 0 var(--container-padding);
}

.gallery-header .section-subtitle {
    margin: 0 auto;
}

.gallery-marquee {
    overflow: hidden;
    width: 100%;
}

.gallery-track {
    display: flex;
    gap: 1.5rem;
    animation: marquee 40s linear infinite;
    width: max-content;
}

.gallery-track:hover {
    animation-play-state: paused;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.gallery-item {
    flex-shrink: 0;
    width: 400px;
    position: relative;
    overflow: hidden;
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform var(--duration-slower) var(--ease-out);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-item-label {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md) var(--space-sm);
    background: linear-gradient(to top, rgba(44, 40, 37, 0.6), transparent);
    color: var(--white);
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
}

/* ========================================
   Section — Reviews
   ======================================== */
.section-reviews {
    padding: var(--space-4xl) 0;
    background: var(--warm-white);
}

.reviews-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.reviews-header .section-subtitle {
    margin: 0 auto;
}

.reviews-slider {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    min-height: 280px;
}

.review-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--duration-medium) var(--ease-out);
    pointer-events: none;
}

.review-card.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    position: relative;
}

.review-stars {
    color: var(--gold);
    font-size: 1rem;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-lg);
}

.review-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--ink-light);
    font-style: italic;
    margin-bottom: var(--space-lg);
}

.review-author {
    display: flex;
    justify-content: center;
    align-items: center;
}

.review-author-name {
    font-weight: 500;
    display: block;
    margin-bottom: 0.25rem;
}

.review-author-detail {
    font-size: 0.8125rem;
    color: var(--tea-brown);
}

.reviews-nav {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: var(--space-xl);
}

.reviews-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--clay-light);
    transition: all var(--duration-fast);
}

.reviews-dot.active {
    background: var(--tea-dark);
    transform: scale(1.3);
}

/* ========================================
   Section — CTA
   ======================================== */
.section-cta {
    position: relative;
    height: 70vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.cta-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 40, 37, 0.45);
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 0 var(--container-padding);
}

.cta-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: var(--space-md);
}

.cta-text {
    font-size: 1.125rem;
    opacity: 0.85;
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Section — Newsletter
   ======================================== */
.section-newsletter {
    background: var(--moss);
    color: var(--ivory);
    padding: var(--space-3xl) 0;
}

.newsletter-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 400;
    color: var(--ivory);
    margin-bottom: var(--space-md);
    letter-spacing: 0.01em;
}

.newsletter-text {
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(245, 240, 232, 0.85);
    margin-bottom: var(--space-lg);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-social {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.newsletter-social-link {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ivory);
    padding: 0.4rem 0.8rem;
    border: 1px solid rgba(245, 240, 232, 0.4);
    transition: all var(--duration-fast) var(--ease-out);
}

.newsletter-social-link:hover {
    background: var(--ivory);
    color: var(--moss);
    border-color: var(--ivory);
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    max-width: 540px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
}

.newsletter-input {
    flex: 1 1 280px;
    min-width: 0;
    padding: 0.95rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--ivory);
    background: transparent;
    border: 1px solid rgba(245, 240, 232, 0.5);
    border-radius: 0;
    outline: none;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.newsletter-input::placeholder {
    color: rgba(245, 240, 232, 0.7);
}

.newsletter-input:focus {
    border-color: var(--ivory);
}

.newsletter-btn {
    padding: 0.95rem 2.25rem;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--moss);
    background: var(--ivory);
    border: 1px solid var(--ivory);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.newsletter-btn:hover {
    background: transparent;
    color: var(--ivory);
}

@media (max-width: 600px) {
    .newsletter-form { flex-direction: column; }
    .newsletter-btn { width: 100%; }
}

/* ========================================
   Nav — Dropdown (Travel Guide)
   ======================================== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-dropdown-toggle .nav-dropdown-arrow {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg) translate(-2px, -2px);
    transition: transform var(--duration-fast) var(--ease-out);
    opacity: 0.7;
}

.nav-dropdown:hover .nav-dropdown-toggle .nav-dropdown-arrow,
.nav-dropdown.open .nav-dropdown-toggle .nav-dropdown-arrow {
    transform: rotate(225deg) translate(-2px, -2px);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    min-width: 240px;
    background: var(--white);
    box-shadow: 0 12px 40px rgba(44, 40, 37, 0.08), 0 2px 8px rgba(44, 40, 37, 0.04);
    border: 1px solid rgba(196, 168, 130, 0.18);
    padding: 0.75rem 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out),
                visibility var(--duration-fast) var(--ease-out);
    z-index: 1000;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--white);
    border-top: 1px solid rgba(196, 168, 130, 0.18);
    border-left: 1px solid rgba(196, 168, 130, 0.18);
}

.nav-dropdown-link {
    display: block;
    padding: 0.6rem 1.25rem;
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    color: var(--ink-light);
    transition: color var(--duration-fast) var(--ease-out),
                background var(--duration-fast) var(--ease-out);
    text-transform: none;
}

.nav-dropdown-link:hover {
    color: var(--ink);
    background: var(--ivory);
}

.nav-dropdown-link strong {
    display: block;
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 2px;
}

.nav-dropdown-link span {
    display: block;
    font-size: 0.75rem;
    color: var(--tea-brown);
    line-height: 1.4;
}

@media (max-width: 900px) {
    .nav-dropdown-menu { display: none; }
    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        box-shadow: none;
        border: none;
        padding: 0 0 0 1rem;
        min-width: 0;
        background: transparent;
    }
    .nav-dropdown-menu::before { display: none; }
}

/* 二级菜单里可展开子菜单的项（Culture） */
.nav-dropdown-link.has-sub {
    position: relative;
    cursor: pointer;
}

.nav-dropdown-link.has-sub::after {
    content: '';
    position: absolute;
    right: 1.25rem;
    top: 50%;
    width: 6px;
    height: 6px;
    border-right: 1px solid currentColor;
    border-top: 1px solid currentColor;
    transform: translateY(-50%) rotate(45deg);
    opacity: 0.5;
}

/* 三级子菜单（默认隐藏，hover has-sub 项时弹出到右侧） */
.nav-dropdown-sub {
    position: absolute;
    top: -0.5rem;
    left: 100%;
    min-width: 260px;
    background: var(--white);
    box-shadow: 0 12px 40px rgba(44, 40, 37, 0.08), 0 2px 8px rgba(44, 40, 37, 0.04);
    border: 1px solid rgba(196, 168, 130, 0.18);
    padding: 0.75rem 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out),
                visibility var(--duration-fast) var(--ease-out);
    transform: translateX(-6px);
    z-index: 1001;
}

.nav-dropdown-link.has-sub:hover > .nav-dropdown-sub,
.nav-dropdown-link.has-sub.open > .nav-dropdown-sub {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
}

/* 移动端：三级菜单内联展开，无浮动 */
@media (max-width: 900px) {
    .nav-dropdown-link.has-sub::after { display: none; }
    .nav-dropdown-sub {
        position: static;
        box-shadow: none;
        border: none;
        padding: 0 0 0 1rem;
        min-width: 0;
        background: transparent;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--duration-fast) var(--ease-out);
    }
    .nav-dropdown-link.has-sub.open > .nav-dropdown-sub {
        max-height: 600px;
    }
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--ink);
    color: var(--ivory);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-logo {
    margin-bottom: var(--space-md);
}

.footer-logo-cn {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.15em;
    display: block;
}

.footer-logo-en {
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--clay);
    display: block;
    margin-top: 4px;
}

.footer-tagline {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--clay);
    margin-bottom: var(--space-sm);
}

.footer-desc {
    font-size: 0.875rem;
    color: rgba(245, 240, 232, 0.5);
    line-height: 1.7;
}

.footer-col h4 {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    color: var(--clay);
}

.footer-col a {
    display: block;
    font-size: 0.875rem;
    color: rgba(245, 240, 232, 0.6);
    margin-bottom: 0.75rem;
    transition: color var(--duration-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(245, 240, 232, 0.1);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(245, 240, 232, 0.4);
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-bottom-links a {
    font-size: 0.8125rem;
    color: rgba(245, 240, 232, 0.4);
}

.footer-bottom-links a:hover {
    color: var(--ivory);
}

/* ========================================
   Scroll Animations
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1200px) {
    .dimensions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .destinations-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .destination-card-large {
        grid-column: span 2;
    }
    .product-card {
        grid-template-columns: 220px 1fr;
    }
}

@media (max-width: 1024px) {
    :root {
        --container-padding: 1.5rem;
    }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

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

    .intro-left {
        position: static;
    }

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

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

    .destination-card-large {
        grid-column: span 1;
    }

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

    .product-card {
        grid-template-columns: 200px 1fr;
    }

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

    .prepare-left {
        height: 50vh;
    }

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

    .fellow-image {
        order: -1;
    }

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

@media (max-width: 768px) {
    :root {
        --space-4xl: 6rem;
        --space-3xl: 4rem;
        --space-2xl: 3rem;
    }

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

    .product-card {
        grid-template-columns: 1fr;
    }

    .product-card-img {
        height: 220px;
    }

    .gallery-item {
        width: 300px;
    }

    .gallery-item img {
        height: 220px;
    }

    .fellow-stage {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1.25rem;
    }

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

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

    .prepare-right {
        padding: var(--space-xl) var(--space-lg);
    }

    .destination-card {
        aspect-ratio: 3/4;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}