/* ========================================
   YANGXIAN TEAPOT — Premium Zisha Teapots
   Minimalist High-End Design System
   Inspired by essenceoftea.com
   ======================================== */

/* CSS Variables */
:root {
    --color-black:        #0a0a0a;
    --color-white:        #ffffff;
    --color-gray-50:      #fbfaf9;
    --color-gray-100:     #f7f6f4;
    --color-gray-200:     #eeece9;
    --color-gray-400:     #b0aba3;
    --color-gray-600:     #6b6560;
    --color-gray-800:     #2e2b28;

    /* 短名别名 —— cart.html / checkout.html / admin.html 的内联样式用的是这一组。
       之前只定义了 --color-* 系列，var(--accent) 等取不到值，
       会让整条声明在计算阶段失效（例如结账按钮变成白底白字、卡片没有边框）。 */
    --accent:             #8b4513;
    --bg:                 #f5f3f0;
    --card:               #ffffff;
    --border:             #e5e2dd;
    --success:            #2d5a27;
    --danger:             #a33;
    --text:               #1a1a1a;

    --font-primary:       'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-size-xs:       11px;
    --font-size-sm:       13px;
    --font-size-base:     15px;
    --font-size-lg:       18px;
    --font-size-xl:       24px;
    --font-size-2xl:      36px;
    --font-size-3xl:      56px;

    --spacing-1:  8px;
    --spacing-2:  16px;
    --spacing-3:  32px;
    --spacing-4:  56px;
    --spacing-5:  96px;
    --spacing-6:  140px;

    --max-width:          1360px;
    --transition-fast:    0.2s ease;
    --transition-base:    0.4s ease;
    --transition-slow:    0.7s ease;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.65;
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}
img  { max-width: 100%; height: auto; display: block; }
a    { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul   { list-style: none; }

/* ── Announcement Bar ── */
.announcement-bar {
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
    padding: 10px var(--spacing-2);
    font-size: var(--font-size-xs);
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

/* ── Header ── */
.site-header {
    position: fixed;
    top: 36px; /* height of announcement bar */
    left: 0;
    width: 100%;
    background-color: rgba(255,255,255,0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 900;
    transition: top var(--transition-base), box-shadow var(--transition-base);
}
.site-header.scrolled {
    top: 0;
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

/* 没有公告栏的子页面（购物车/结算/结果页）不需要为公告栏留出 36px 空隙 */
body.no-announcement .site-header {
    top: 0;
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-3);
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-3);
    align-items: center;
}
.nav-menu a {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-gray-600);
    position: relative;
}
.nav-menu a:hover { color: var(--color-black); }
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -3px; left: 0;
    width: 0; height: 1px;
    background-color: var(--color-black);
    transition: width var(--transition-fast);
}
.nav-menu a:hover::after { width: 100%; }

.brand-logo a {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.1;
}
.logo-main {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: var(--color-black);
}
.logo-sub {
    font-size: var(--font-size-xs);
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-gray-400);
    font-weight: 400;
}

.cart-icon {
    border: 1px solid var(--color-gray-400);
    padding: 6px 14px;
    font-size: var(--font-size-xs);
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: var(--transition-fast);
}
.cart-icon:hover {
    background-color: var(--color-black);
    color: var(--color-white) !important;
    border-color: var(--color-black);
}

/* ── Hero Banner — Full Viewport ── */
.hero-banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-gray-800);
    /* push past sticky header */
    margin-top: 0;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: scale(1.05);
    transition: transform 8s ease;
}
.hero-banner:hover .hero-bg img { transform: scale(1); }

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        160deg,
        rgba(10,10,10,0.55) 0%,
        rgba(10,10,10,0.30) 60%,
        rgba(10,10,10,0.15) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding: 0 var(--spacing-3);
    max-width: 720px;
}
.hero-eyebrow {
    font-size: var(--font-size-xs);
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.65);
    margin-bottom: var(--spacing-2);
}
.hero-title {
    font-size: clamp(44px, 9vw, 88px);
    font-weight: 700;
    letter-spacing: 8px;
    text-transform: uppercase;
    line-height: 1.0;
    margin-bottom: var(--spacing-2);
    color: var(--color-white);
}
.hero-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: rgba(255,255,255,0.75);
    margin-bottom: var(--spacing-3);
    line-height: 1.7;
}

.hero-scroll-hint {
    position: absolute;
    bottom: var(--spacing-3);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.3);
    animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50%       { opacity: 1;   transform: scaleY(1.3); }
}

/* ── Buttons ── */
.btn-primary {
    display: inline-block;
    padding: 14px 40px;
    background-color: var(--color-white);
    color: var(--color-black);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
}
.btn-primary:hover {
    background-color: var(--color-gray-200);
}

.btn-secondary {
    display: inline-block;
    padding: 12px 36px;
    background-color: transparent;
    color: var(--color-black);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid var(--color-black);
    cursor: pointer;
    transition: var(--transition-fast);
}
.btn-secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn-link {
    font-size: var(--font-size-sm);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-black);
    border-bottom: 1px solid var(--color-black);
    padding-bottom: 2px;
    transition: var(--transition-fast);
}
.btn-link:hover { color: var(--color-gray-600); border-color: var(--color-gray-600); }

/* ── Intro Statement ── */
.intro-statement {
    padding: var(--spacing-6) var(--spacing-3);
    background-color: var(--color-gray-100);
}
.intro-container {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}
.intro-text {
    font-size: clamp(18px, 2.2vw, 26px);
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-gray-800);
    font-style: italic;
}

/* ── Section Shared ── */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-6) var(--spacing-3);
}
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4);
}
.section-title {
    font-size: var(--font-size-xs);
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-gray-400);
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-gray-800);
}

/* ── Product Grid ── */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2);
}

.product-card {
    cursor: pointer;
    transition: transform var(--transition-base);
}
.product-card:hover {
    transform: translateY(-4px);
}

.product-image {
    position: relative;
    overflow: hidden;
    background-color: var(--color-white);
}
.product-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}
.product-card:hover .product-image img {
    transform: scale(1.06);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(10,10,10,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}
.product-overlay span {
    color: var(--color-white);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid rgba(255,255,255,0.7);
    padding: 8px 20px;
}
.product-card:hover .product-overlay { opacity: 1; }

.product-info {
    padding: 16px 4px 8px;
}
.product-name {
    font-size: var(--font-size-base);
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    color: var(--color-black);
}
.product-clay {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    margin-bottom: 6px;
}
.product-price {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-gray-800);
}

.view-all-container {
    text-align: center;
    margin-top: var(--spacing-4);
}

/* ── Brand Story ── */
.brand-story {
    background-color: var(--color-white);
}
.story-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 640px;
}
.story-image {
    overflow: hidden;
}
.story-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.story-image:hover img { transform: scale(1.04); }

.story-content {
    padding: var(--spacing-6) var(--spacing-5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: var(--color-gray-100);
}
.story-eyebrow {
    font-size: var(--font-size-xs);
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-gray-400);
    margin-bottom: 16px;
}
.story-title {
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    line-height: 1.1;
    margin-bottom: var(--spacing-3);
    color: var(--color-black);
}
.story-text {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.85;
    margin-bottom: var(--spacing-2);
}
.story-content .btn-link { margin-top: var(--spacing-2); }

/* ── Clay Guide ── */
.clay-guide {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-6) var(--spacing-3);
}
.clay-container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}
.clay-title {
    font-size: var(--font-size-xs);
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-gray-400);
    margin-bottom: 12px;
}
.clay-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: rgba(255,255,255,0.65);
    margin-bottom: var(--spacing-4);
}
.clay-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3);
    max-width: 900px;
    margin: 0 auto;
}
.clay-item {
    text-align: center;
    padding: var(--spacing-3);
    border: 1px solid rgba(255,255,255,0.1);
    transition: border-color var(--transition-base);
}
.clay-item:hover { border-color: rgba(255,255,255,0.35); }
.clay-swatch {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-2);
}
.clay-zini  { background-color: #6b4c3b; box-shadow: 0 0 0 4px rgba(107,76,59,0.25); }
.clay-zhuni { background-color: #b03a2e; box-shadow: 0 0 0 4px rgba(176,58,46,0.25); }
.clay-lvni  { background-color: #c9b882; box-shadow: 0 0 0 4px rgba(201,184,130,0.25); }
.clay-item h4 {
    font-size: var(--font-size-sm);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: 10px;
}
.clay-item p {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.5);
    line-height: 1.7;
}

/* ── New Arrivals (reuses .section-container + .product-grid) ── */
.new-arrivals {
    background-color: var(--color-gray-100);
}

/* ── Newsletter ── */
.newsletter {
    background-color: var(--color-white);
    padding: var(--spacing-6) var(--spacing-3);
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}
.newsletter-container {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
}
.newsletter-title {
    font-size: var(--font-size-xs);
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-black);
    margin-bottom: 12px;
}
.newsletter-text {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-3);
    line-height: 1.7;
}
.newsletter-form {
    display: flex;
    gap: 0;
    border: 1px solid var(--color-gray-400);
}
.email-input {
    flex: 1;
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    border: none;
    outline: none;
    background: transparent;
    color: var(--color-black);
    font-family: var(--font-primary);
}
.email-input::placeholder { color: var(--color-gray-400); }
.btn-subscribe {
    padding: 12px 24px;
    background-color: var(--color-black);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    font-family: var(--font-primary);
    transition: background-color var(--transition-fast);
    white-space: nowrap;
}
.btn-subscribe:hover { background-color: var(--color-gray-800); }

/* ── Footer ── */
.site-footer {
    background-color: var(--color-black);
    color: var(--color-white);
}
.footer-top {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-5) var(--spacing-3) var(--spacing-3);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}
.footer-brand .logo-main {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 6px;
    color: var(--color-white);
}
.footer-brand .logo-sub {
    font-size: var(--font-size-xs);
    letter-spacing: 4px;
    color: rgba(255,255,255,0.35);
}
.footer-tagline {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.35);
    letter-spacing: 1px;
    margin-top: 8px;
}
.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-4) var(--spacing-3);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-3);
}
.footer-section h4 {
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.45);
    transition: color var(--transition-fast);
}
.footer-links a:hover { color: var(--color-white); }
.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-3);
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-bottom p {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.3);
    letter-spacing: 0.5px;
}

/* ── Responsive ── */
@media (max-width: 1100px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-2); }
    .footer-container { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root {
        --spacing-5: 64px;
        --spacing-6: 80px;
    }

    .announcement-bar { font-size: 10px; }

    .header-container { padding: 0 var(--spacing-2); }
    .main-navigation  { display: none; }
    .site-header { top: 32px; }

    .hero-title { letter-spacing: 4px; }
    .hero-subtitle { font-size: var(--font-size-base); }

    .story-container {
        grid-template-columns: 1fr;
    }
    .story-image { height: 320px; }
    .story-content { padding: var(--spacing-4) var(--spacing-3); }

    .clay-grid { grid-template-columns: 1fr; gap: var(--spacing-2); }

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

    .footer-container { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .newsletter-form { flex-direction: column; }
    .btn-subscribe { padding: 14px; }
    .footer-container { grid-template-columns: 1fr; }
}