/* ========================================
   品致数荣 - 全局样式表
   国风汉元素风格 | 浅红 + 米白 + 浅灰
   ======================================== */

/* CSS Reset & 基础变量 */
:root {
    --primary-red: #c44536;
    --light-red: #e8c4c4;
    --beige-white: #f5f1ed;
    --light-gray: #e5e5e5;
    --medium-gray: #9a9a9a;
    --dark-gray: #4a4a4a;
    --text-dark: #2c2c2c;
    --text-light: #666666;
    --white: #ffffff;
    --shadow-soft: 0 4px 20px rgba(196, 69, 54, 0.08);
    --shadow-medium: 0 8px 30px rgba(196, 69, 54, 0.12);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --curve-wave: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M0,60 C300,100 600,20 900,60 C1200,100 1200,100 1200,100 L1200,120 L0,120 Z' fill='%23f5f1ed'/%3E%3C/svg%3E");
}

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

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

body {
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    background-color: var(--beige-white);
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
    position: relative;
}

/* 波浪曲线背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(196, 69, 54, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(196, 69, 54, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5%;
    position: relative;
}

.container-narrow {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* ========================================
   导航栏样式
   ======================================== */
.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(245, 241, 237, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: var(--transition-smooth);
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-red);
    letter-spacing: 2px;
    font-family: "Noto Serif SC", serif;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    padding: 8px 0;
    transition: var(--transition-smooth);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-red);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: var(--primary-red);
}

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

.nav-link.active {
    color: var(--primary-red);
}

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

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

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

/* 移动端菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--beige-white);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition-smooth);
    z-index: 999;
    padding: 80px 30px 30px;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu li {
    margin-bottom: 25px;
}

.mobile-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 1.2rem;
    font-weight: 500;
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--light-gray);
    transition: var(--transition-smooth);
}

.mobile-menu a:hover {
    color: var(--primary-red);
    padding-left: 10px;
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    font-weight: 600;
    letter-spacing: 3px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-red);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-top: 20px;
    letter-spacing: 1px;
}

/* 波浪分割线 */
.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
}

.wave-divider.top {
    top: 0;
    bottom: auto;
    transform: rotate(180deg);
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-red);
    color: var(--white);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 2px;
    border: 2px solid var(--primary-red);
    border-radius: 0;
    transition: var(--transition-smooth);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    background: transparent;
    color: var(--primary-red);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(196, 69, 54, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary-red);
}

.btn-outline:hover {
    background: var(--primary-red);
    color: var(--white);
}

/* ========================================
   卡片样式
   ======================================== */
.card {
    background: var(--white);
    border-radius: 0;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
    position: relative;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

.card-content {
    padding: 30px;
}

.card-title {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 12px;
    font-weight: 600;
}

.card-text {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--medium-gray);
    font-size: 0.9rem;
}

/* ========================================
   页脚样式
   ======================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 80px 0 30px;
    position: relative;
}

.footer-wave {
    position: absolute;
    top: -60px;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 50px;
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--light-red);
    letter-spacing: 1px;
}

.footer-section p,
.footer-section a {
    color: var(--medium-gray);
    line-height: 2;
    text-decoration: none;
    display: block;
    transition: var(--transition-smooth);
}

.footer-section a:hover {
    color: var(--primary-red);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: var(--medium-gray);
}

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

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 12px 30px;
        font-size: 0.9rem;
    }
}

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}