/* ============================================
   梧悠杨品牌官网 | WuyouYang.cn
   设计系统：自然 · 温度 · 品质
   ============================================ */

/* --- CSS Variables --- */
:root {
    --color-primary: #2D5A27;
    --color-primary-light: #4A7A3F;
    --color-accent: #8B9A46;
    --color-warm: #C08552;
    --color-warm-light: #D4956A;
    --color-bg: #FAF8F5;
    --color-bg-alt: #F0EDE8;
    --color-dark: #1C1C1C;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #FFFFFF;
    --color-border: #E0DCD5;
    --font-heading: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.10);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* --- Header / Nav --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}
.logo-icon { font-size: 1.5rem; }

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
    background: rgba(45,90,39,0.06);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--color-text);
    padding: 4px;
}

/* --- Hero --- */
.hero {
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(139,154,70,0.06) 0%, var(--color-bg) 100%);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-dark);
    margin-bottom: 24px;
    letter-spacing: 0.02em;
}
.hero-sub {
    display: block;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.highlight {
    color: var(--color-primary);
    position: relative;
}
.highlight::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 0;
    right: 0;
    height: 6px;
    background: rgba(139,154,70,0.25);
    border-radius: 3px;
    z-index: -1;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 48px;
    padding: 10px 24px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.95rem;
}
.badge-text {
    font-weight: 700;
    color: var(--color-primary);
}
.badge-sub {
    color: var(--color-text-light);
    font-size: 0.8rem;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid var(--color-border);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.02em;
    border: 2px solid transparent;
}
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-1px);
}

/* --- Promise Bar --- */
.promise-bar {
    padding: 48px 0 60px;
    background: var(--color-white);
}
.promise-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.promise-card {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius);
    transition: var(--transition);
}
.promise-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.promise-icon {
    font-size: 2.4rem;
    margin-bottom: 16px;
}
.promise-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-dark);
}
.promise-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* --- Sections --- */
.section {
    padding: 80px 0;
}
.section-alt {
    background: var(--color-bg-alt);
}
.section-dark {
    background: var(--color-dark);
    color: var(--color-white);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    color: inherit;
}
.section-title.light { color: var(--color-white); }

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1rem;
    margin-bottom: 48px;
}
.section-subtitle.light { color: rgba(255,255,255,0.7); }

/* --- Pricing Cards --- */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.pricing-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
}
.pricing-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.pricing-card.featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.03);
}
.pricing-card.featured:hover {
    transform: scale(1.03) translateY(-4px);
}

.card-badge {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(139,154,70,0.1);
    color: var(--color-accent);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.06em;
}
.pricing-card.featured .card-badge {
    background: var(--color-primary);
    color: var(--color-white);
}

.card-price {
    margin-bottom: 12px;
}
.price-symbol {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-light);
    vertical-align: top;
    line-height: 1.8;
}
.price-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: -0.02em;
}

.card-desc {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.card-features {
    list-style: none;
    padding: 0;
}
.card-features li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--color-text);
}
.card-features li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: 700;
    margin-right: 8px;
}

.pricing-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* --- Cases Grid --- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}
.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.case-image {
    height: 200px;
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 16px;
}
.case-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,255,255,0.9);
    color: var(--color-text);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}
.case-info {
    padding: 20px;
}
.case-info h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-dark);
}
.case-info p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* --- About --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.about-lead {
    font-size: 1.1rem;
    color: var(--color-dark);
    margin-bottom: 20px;
    line-height: 1.8;
}
.about-text p {
    margin-bottom: 16px;
    color: var(--color-text);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.stat {
    text-align: center;
}
.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
}
.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.value-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    background: var(--color-white);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.value-item:hover {
    box-shadow: var(--shadow-sm);
}
.value-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}
.value-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.value-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* --- Contact --- */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.contact-card {
    text-align: center;
    padding: 36px 20px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    transition: var(--transition);
}
.contact-card:hover {
    background: rgba(255,255,255,0.1);
}
.contact-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}
.contact-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.contact-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}
.contact-link {
    color: var(--color-warm-light);
    font-weight: 600;
    font-size: 1.1rem;
}
.contact-link:hover {
    color: var(--color-warm);
}
.contact-sub {
    font-size: 0.8rem !important;
    opacity: 0.6;
}

/* --- Footer --- */
.footer {
    background: var(--color-dark);
    padding: 32px 0;
    text-align: center;
}
.footer-info {
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    line-height: 2;
}
.footer-info p { margin: 4px 0; }
.footer-beian a {
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
}
.footer-beian a:hover {
    color: rgba(255,255,255,0.7);
}
.footer-police {
    color: rgba(255,255,255,0.3);
    font-size: 0.78rem;
}
.police-icon {
    margin-right: 6px;
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .hero { padding: 120px 0 72px; }
    
    .nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(12px);
        padding: 12px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }
    .nav.open { display: flex; }
    .nav-link { padding: 12px 16px; border-radius: var(--radius-sm); }
    .nav-toggle { display: block; }

    .promise-cards,
    .pricing-cards,
    .contact-cards { grid-template-columns: 1fr; }

    .pricing-card.featured { transform: none; }
    .pricing-card.featured:hover { transform: translateY(-4px); }

    .cases-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .about-stats { gap: 24px; }
    .stat-number { font-size: 1.6rem; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.6rem; }
    .hero-cta { flex-direction: column; align-items: center; }
    .btn { width: 100%; text-align: center; }
}