/* ========================================
   丝梦建站 - 柔雅轻奢全局样式
   甜品复古风：奶白 + 浅棕 + 浅黄
   ======================================== */

/* CSS Reset & 基础变量 */
:root {
    --color-cream: #FFF8F0;
    --color-cream-dark: #F5EBE0;
    --color-brown-light: #D4B896;
    --color-brown-medium: #C4A574;
    --color-brown-dark: #8B7355;
    --color-yellow-soft: #FDF5E6;
    --color-yellow-warm: #F4E4C1;
    --color-text-primary: #5D4E37;
    --color-text-secondary: #8B7D6B;
    --color-accent: #C9A961;
    --color-white: #FFFFFF;
    --shadow-soft: 0 4px 20px rgba(139, 115, 85, 0.1);
    --shadow-hover: 0 8px 30px rgba(139, 115, 85, 0.15);
    --border-radius-lg: 12px;
    --border-radius-md: 8px;
    --border-radius-sm: 4px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-primary: "Georgia", "Times New Roman", serif;
    --font-secondary: "Helvetica Neue", Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--color-cream);
    color: var(--color-text-primary);
    line-height: 1.8;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

/* ========================================
   顶部导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition-smooth);
    padding: 20px 0;
}

.header.scrolled {
    background: rgba(255, 248, 240, 0.98);
    box-shadow: var(--shadow-soft);
    padding: 15px 0;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    font-family: var(--font-primary);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 2px;
}

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

.nav-link {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-primary);
    border-radius: var(--border-radius-md);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-smooth);
}

.nav-link:hover::before {
    width: 80%;
}

.nav-link:hover {
    color: var(--color-accent);
    background: var(--color-yellow-warm);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--color-brown-dark) 0%, var(--color-brown-medium) 100%);
    color: var(--color-cream);
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-family: var(--font-primary);
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--color-yellow-warm);
    letter-spacing: 1px;
}

.footer-section p {
    font-size: 14px;
    line-height: 2;
    opacity: 0.9;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14px;
    opacity: 0.85;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-yellow-warm);
    padding-left: 8px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    opacity: 0.85;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 248, 240, 0.2);
    padding-top: 30px;
    text-align: center;
    font-size: 13px;
    opacity: 0.75;
}

/* ========================================
   通用组件
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-family: var(--font-primary);
    font-size: 42px;
    text-align: center;
    margin-bottom: 20px;
    color: var(--color-text-primary);
    position: relative;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-brown-medium) 100%);
    color: var(--color-white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--color-brown-medium);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: var(--color-brown-medium);
    color: var(--color-white);
}

/* ========================================
   卡片样式
   ======================================== */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

.card-content {
    padding: 30px;
}

.card-title {
    font-family: var(--font-primary);
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.card-text {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--color-text-secondary);
    padding-top: 15px;
    border-top: 1px solid var(--color-cream-dark);
}

/* ========================================
   动画效果
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .header-container {
        padding: 0 30px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--color-cream);
        flex-direction: column;
        padding: 40px;
        gap: 15px;
        transition: var(--transition-smooth);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container,
    .header-container,
    .footer-container {
        padding: 0 20px;
    }
    
    .logo-text {
        font-size: 24px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .btn {
        padding: 14px 30px;
        font-size: 14px;
    }
}

@media (max-width: 576px) {
    .logo-text {
        font-size: 20px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .card-content {
        padding: 20px;
    }
    
    .card-title {
        font-size: 18px;
    }
}