/* ============================================================
   style.css - 奥旺达实业独立站样式 (Font Awesome 6.5.1)
   极简黑白灰 + 暖棕强调色，响应式设计
   ============================================================ */

:root {
    --color-white: #ffffff;
    --color-off-white: #fafaf9;
    --color-light-gray: #f2f2f0;
    --color-border: #e5e5e0;
    --color-mid-gray: #a0a09a;
    --color-dark-gray: #4a4a44;
    --color-charcoal: #2a2a26;
    --color-near-black: #1a1a17;
    --color-black: #0d0d0b;
    --color-accent: #b8976e;
    --color-accent-dark: #9a7d5a;
    --color-accent-light: #d4c0a8;
    --color-accent-bg: rgba(184, 151, 110, 0.08);

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.375rem;
    --font-size-xl: 1.75rem;
    --font-size-2xl: 2.25rem;
    --font-size-hero: clamp(2.5rem, 5vw, 4.5rem);

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    --spacing-section: clamp(4rem, 8vw, 8rem);

    --nav-height: 72px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --transition-fast: 0.2s cubic-bezier(0.4,0,0.2,1);
    --transition-base: 0.35s cubic-bezier(0.4,0,0.2,1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-charcoal);
    background: var(--color-white);
    overflow-x: hidden;
}

::selection { background: var(--color-accent); color: var(--color-white); }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; border: none; outline: none; }

.section-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
.section-header { text-align: center; margin-bottom: var(--spacing-xl); }
.section-tag { display: inline-block; font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-accent); margin-bottom: var(--spacing-sm); padding: 4px 14px; border: 1px solid var(--color-accent-light); border-radius: var(--radius-full); background: var(--color-accent-bg); }
.section-title { font-size: var(--font-size-2xl); font-weight: 600; color: var(--color-near-black); letter-spacing: -0.02em; line-height: 1.3; margin-bottom: var(--spacing-sm); }
.section-desc { font-size: var(--font-size-md); color: var(--color-dark-gray); max-width: 640px; margin: 0 auto; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: var(--spacing-xs); padding: 14px 32px; font-size: var(--font-size-sm); font-weight: 600; letter-spacing: 0.03em; border-radius: var(--radius-full); transition: all var(--transition-base); white-space: nowrap; }
.btn-primary { background: var(--color-near-black); color: var(--color-white); border: 2px solid var(--color-near-black); }
.btn-primary:hover { background: var(--color-black); border-color: var(--color-black); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-near-black); border: 2px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-near-black); background: var(--color-near-black); color: var(--color-white); transform: translateY(-2px); }
.btn-arrow { transition: transform var(--transition-fast); }
.btn:hover .fa-arrow-right { transform: translateX(4px); transition: transform var(--transition-fast); }
.btn-submit { width: 100%; justify-content: center; padding: 16px 32px; font-size: var(--font-size-base); }

/* 导航 */
.nav-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(16px); height: var(--nav-height); border-bottom: 1px solid transparent; transition: all var(--transition-base); }
.nav-header.scrolled { border-bottom-color: var(--color-border); box-shadow: var(--shadow-sm); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: var(--font-size-md); color: var(--color-near-black); }
.nav-logo-img { height: 36px; width: auto; display: block; }
.nav-links { display: flex; align-items: center; gap: var(--spacing-xs); }
.nav-link { padding: 8px 16px; font-size: var(--font-size-sm); font-weight: 500; color: var(--color-dark-gray); border-radius: var(--radius-full); transition: all var(--transition-fast); }
.nav-link:hover, .nav-link.active { color: var(--color-near-black); font-weight: 600; }
.nav-link-cta { background: var(--color-near-black); color: var(--color-white) !important; padding: 10px 20px; margin-left: 8px; }
.nav-link-cta:hover { background: var(--color-black); transform: translateY(-1px); }
.nav-actions { display: flex; align-items: center; gap: var(--spacing-sm); }
.lang-switch { display: flex; align-items: center; gap: 2px; padding: 6px 10px; border-radius: var(--radius-full); border: 1px solid var(--color-border); font-size: var(--font-size-xs); font-weight: 600; color: var(--color-dark-gray); transition: all var(--transition-fast); }
.lang-switch:hover { border-color: var(--color-near-black); color: var(--color-near-black); }
.lang-inactive { color: var(--color-mid-gray); font-weight: 400; }
.lang-switch.en-active .lang-indicator:first-child { color: var(--color-mid-gray); font-weight: 400; }
.lang-switch.en-active .lang-indicator:last-child { color: var(--color-near-black); font-weight: 600; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; z-index: 1001; }
.hamburger-line { width: 22px; height: 2px; background: var(--color-near-black); transition: all var(--transition-base); border-radius: 2px; }
.hamburger.active .hamburger-line:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active .hamburger-line:nth-child(2) { opacity: 0; }
.hamburger.active .hamburger-line:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
.mobile-menu { display: none; position: fixed; top: var(--nav-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); padding: var(--spacing-md); border-bottom: 1px solid var(--color-border); flex-direction: column; gap: 4px; z-index: 999; transform: translateY(-10px); opacity: 0; pointer-events: none; transition: all var(--transition-base); }
.mobile-menu.open { display: flex; transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-nav-link { padding: 14px 20px; font-size: var(--font-size-base); font-weight: 500; color: var(--color-dark-gray); border-radius: var(--radius-md); }
.mobile-nav-link:hover { background: var(--color-light-gray); color: var(--color-near-black); }
.mobile-nav-cta { background: var(--color-near-black); color: var(--color-white) !important; text-align: center; margin-top: 8px; }

/* Hero */
.hero-section { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; background: var(--color-off-white); overflow: hidden; padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-md) var(--spacing-2xl); }
.hero-bg-pattern { position: absolute; inset: 0; background: radial-gradient(ellipse at 25% 50%, rgba(184,151,110,0.06) 0%, transparent 60%), radial-gradient(ellipse at 75% 30%, rgba(0,0,0,0.03) 0%, transparent 50%); pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 800px; }
.hero-eyebrow { display: inline-block; font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-accent); margin-bottom: var(--spacing-md); opacity: 0; }
.hero-title { font-size: var(--font-size-hero); font-weight: 700; color: var(--color-near-black); line-height: 1.15; letter-spacing: -0.03em; margin-bottom: var(--spacing-md); opacity: 0; }
.hero-highlight { color: var(--color-accent); }
.hero-subtitle { font-size: var(--font-size-md); color: var(--color-dark-gray); line-height: 1.7; max-width: 560px; margin: 0 auto var(--spacing-lg); opacity: 0; }
.hero-actions { display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; opacity: 0; }
.scroll-indicator { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2; }
.scroll-dot { display: block; width: 8px; height: 8px; background: var(--color-accent); border-radius: 50%; animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100% { opacity: 0.4; transform: translateY(0); } 50% { opacity: 1; transform: translateY(8px); } }

/* 产品 */
.products-section { padding: var(--spacing-section) 0; background: var(--color-white); }
.filter-tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-bottom: var(--spacing-xl); }
.filter-tab { padding: 10px 22px; font-size: var(--font-size-sm); font-weight: 500; color: var(--color-dark-gray); border: 1px solid var(--color-border); border-radius: var(--radius-full); background: var(--color-white); transition: all var(--transition-fast); }
.filter-tab:hover { border-color: var(--color-accent); color: var(--color-accent); }
.filter-tab.active { background: var(--color-near-black); color: var(--color-white); border-color: var(--color-near-black); }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); }
.product-card { background: var(--color-white); border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; transition: all var(--transition-base); border: 1px solid var(--color-border); }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card-image { width: 100%; aspect-ratio: 4/3; overflow: hidden; position: relative; background: var(--color-light-gray); }
.product-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-card-badge { position: absolute; top: 12px; left: 12px; padding: 5px 12px; font-size: var(--font-size-xs); font-weight: 600; background: rgba(255,255,255,0.9); color: var(--color-near-black); border-radius: var(--radius-full); backdrop-filter: blur(4px); }
.product-card-body { padding: var(--spacing-md); }
.product-card-title { font-size: var(--font-size-base); font-weight: 600; color: var(--color-near-black); margin-bottom: 6px; }
.product-card-desc { font-size: var(--font-size-sm); color: var(--color-dark-gray); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-arrow { display: inline-flex; align-items: center; gap: 4px; margin-top: var(--spacing-sm); font-size: var(--font-size-xs); font-weight: 600; color: var(--color-accent); transition: gap var(--transition-fast); }
.product-card-arrow i { font-size: 0.8em; }
.product-card:hover .product-card-arrow { gap: 8px; }

/* 理念 */
.philosophy-section { padding: var(--spacing-section) 0; background: var(--color-off-white); }
.philosophy-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-lg); }
.philosophy-card { text-align: center; padding: var(--spacing-lg) var(--spacing-md); background: var(--color-white); border-radius: var(--radius-lg); border: 1px solid var(--color-border); transition: all var(--transition-base); }
.philosophy-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.philosophy-icon { color: var(--color-accent); margin-bottom: var(--spacing-md); font-size: 2.5rem; }
.philosophy-card-title { font-size: var(--font-size-base); font-weight: 600; color: var(--color-near-black); margin-bottom: var(--spacing-xs); }
.philosophy-card-desc { font-size: var(--font-size-sm); color: var(--color-dark-gray); line-height: 1.6; }

/* 关于我们 - 视频 */
.about-section { padding: var(--spacing-section) 0; background: var(--color-white); }
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-2xl); align-items: center; }
.about-video-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-light-gray);
}
.about-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.about-image-placeholder { display: none; }
.about-stats { display: flex; gap: var(--spacing-md); margin-top: var(--spacing-lg); justify-content: space-between; }
.stat-item { text-align: center; flex: 1; }
.stat-number { font-size: var(--font-size-2xl); font-weight: 700; color: var(--color-near-black); }
.stat-plus { font-size: var(--font-size-lg); font-weight: 600; color: var(--color-accent); }
.stat-label { display: block; font-size: var(--font-size-xs); color: var(--color-mid-gray); margin-top: 4px; text-transform: uppercase; }
.about-title { text-align: left; }
.about-paragraph { font-size: var(--font-size-base); color: var(--color-dark-gray); line-height: 1.8; margin-bottom: var(--spacing-sm); }
.about-highlight-text { font-weight: 500; color: var(--color-accent-dark); padding-left: 16px; border-left: 3px solid var(--color-accent); }

/* 联系区域 */
.contact-section { padding: var(--spacing-section) 0; background: var(--color-off-white); }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); align-items: start; }
.contact-form-wrapper { background: var(--color-white); padding: var(--spacing-lg); border-radius: var(--radius-lg); border: 1px solid var(--color-border); }
.contact-form { display: flex; flex-direction: column; gap: var(--spacing-md); }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label { font-size: var(--font-size-sm); font-weight: 600; color: var(--color-near-black); }
.form-input { padding: 13px 16px; font-size: var(--font-size-sm); color: var(--color-charcoal); background: var(--color-off-white); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: all var(--transition-fast); }
.form-input:focus { border-color: var(--color-accent); background: var(--color-white); box-shadow: 0 0 0 3px var(--color-accent-bg); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-error { font-size: var(--font-size-xs); color: #d45a4a; display: none; }
.form-group.error .form-input { border-color: #d45a4a; background: #fefafa; }
.form-group.error .form-error { display: block; }
.form-success { text-align: center; padding: var(--spacing-xl); }
.success-icon { font-size: 2.5rem; color: #2e7d32; margin-bottom: var(--spacing-md); }

/* 右侧联系信息 */
.contact-info-panel { background: var(--color-white); padding: var(--spacing-lg); border-radius: var(--radius-lg); border: 1px solid var(--color-border); }
.contact-info-heading { font-size: var(--font-size-lg); font-weight: 600; color: var(--color-near-black); margin-bottom: var(--spacing-md); }
.contact-info-list { display: flex; flex-direction: column; gap: var(--spacing-sm); margin-bottom: var(--spacing-lg); }
.contact-info-list li { display: flex; align-items: center; gap: var(--spacing-sm); font-size: var(--font-size-sm); color: var(--color-dark-gray); }
.info-icon { width: 1.2em; text-align: center; color: var(--color-accent); }
.social-heading { font-size: var(--font-size-sm); font-weight: 600; margin-bottom: var(--spacing-sm); color: var(--color-near-black); }
.social-icons { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; }
.social-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--color-light-gray); color: var(--color-dark-gray); transition: all var(--transition-fast); font-size: 1.2rem; }
.social-icon:hover { background: var(--color-near-black); color: var(--color-white); transform: translateY(-3px); }

/* 详情页底部表单区域 */
.detail-cta-section {
    background: var(--color-off-white);
    padding: var(--spacing-section) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--color-charcoal);
}
.detail-cta-section .section-title { color: var(--color-near-black); }
.detail-cta-section .section-desc { color: var(--color-dark-gray); }
.detail-cta-section .btn-primary { background: var(--color-near-black); color: var(--color-white); border-color: var(--color-near-black); }
.detail-cta-section .btn-primary:hover { background: var(--color-black); border-color: var(--color-black); }
.detail-cta-section .form-label {text-align: left; }
/* 页脚 */
.site-footer { background: var(--color-near-black); color: var(--color-mid-gray); padding: var(--spacing-xl) 0 var(--spacing-md); }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--spacing-lg); margin-bottom: var(--spacing-xl); }
.footer-logo { font-size: var(--font-size-md); font-weight: 700; color: var(--color-white); }
.footer-desc { font-size: var(--font-size-sm); color: var(--color-mid-gray); margin-top: var(--spacing-sm); max-width: 280px; }
.footer-heading { font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-white); margin-bottom: var(--spacing-sm); }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: var(--font-size-sm); color: var(--color-mid-gray); }
.footer-links a:hover { color: var(--color-white); }
.footer-contact-list li i { margin-right: 6px; color: var(--color-accent); font-size: 0.9em; width: 1.2em; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--spacing-md); border-top: 1px solid rgba(255,255,255,0.1); flex-wrap: wrap; gap: var(--spacing-sm); }
.footer-copy { font-size: var(--font-size-xs); }
.legal-divider { color: rgba(255,255,255,0.2); margin: 0 4px; }

/* 页脚 Logo 列 */
.footer-col-logo { display: flex; align-items: center; justify-content: center; }
.footer-logo-img { max-width: 140px; max-height: 60px; width: auto; height: auto; }

/* 详情页布局 */
.product-detail-page { padding-top: var(--nav-height); }
.breadcrumb { padding: var(--spacing-md) 0; background: var(--color-off-white); border-bottom: 1px solid var(--color-border); }
.breadcrumb .section-container { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: var(--color-dark-gray); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb-sep { color: var(--color-mid-gray); }
.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-2xl); align-items: start; }
.detail-image-large { width: 100%; aspect-ratio: 4/3; border-radius: var(--radius-lg); overflow: hidden; background: var(--color-light-gray); }
.detail-image-large img { width: 100%; height: 100%; object-fit: cover; }
.detail-category-tag { display: inline-block; padding: 5px 14px; font-size: var(--font-size-xs); font-weight: 600; background: var(--color-accent-bg); color: var(--color-accent); border-radius: var(--radius-full); }
.detail-title { font-size: var(--font-size-2xl); font-weight: 700; color: var(--color-near-black); margin: var(--spacing-sm) 0; }
.detail-desc { font-size: var(--font-size-md); color: var(--color-dark-gray); line-height: 1.8; }
.detail-design-thought { background: var(--color-off-white); padding: var(--spacing-md); border-left: 3px solid var(--color-accent); margin-top: var(--spacing-md); }
.detail-specs { width: 100%; border-collapse: collapse; margin-top: var(--spacing-md); }
.detail-specs th, .detail-specs td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); font-size: var(--font-size-sm); }
.detail-specs th { font-weight: 600; color: var(--color-near-black); background: var(--color-off-white); width: 35%; }
.detail-actions { margin-top: var(--spacing-lg); display: flex; gap: var(--spacing-sm); }
.related-products { padding-top: var(--spacing-xl); border-top: 1px solid var(--color-border); }
.related-title { font-size: var(--font-size-lg); font-weight: 600; text-align: center; margin-bottom: var(--spacing-lg); }

/* 响应式 */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .philosophy-grid { grid-template-columns: repeat(2, 1fr); }
    .about-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-col-logo { justify-content: flex-start; }
    .contact-layout { grid-template-columns: 1fr; }
    .detail-layout { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
    :root { --nav-height: 60px; }
    .nav-logo-img { height: 30px; }
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .products-grid { grid-template-columns: 1fr; }
    .philosophy-grid { grid-template-columns: 1fr; }
    .about-stats { flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-col-logo { justify-content: center; margin-top: var(--spacing-sm); }
    .footer-bottom { flex-direction: column; text-align: center; }
    .detail-actions { flex-direction: column; }
    .hero-title { font-size: clamp(1.8rem, 7vw, 2.6rem); }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
}