/* ================================================
   公用样式 - common.css
   藏后品牌官网
   ================================================ */

/* ---- CSS变量 ---- */
:root {
    --color-primary: #1a2f6e;       /* 主色：深宝石蓝 */
    --color-primary-dark: #111f4d;  /* 深蓝 */
    --color-primary-light: #2a4a9e; /* 亮蓝 */
    --color-gold: #c9a227;          /* 金色 */
    --color-gold-light: #e0c060;    /* 浅金 */
    --color-gold-dark: #a07a10;     /* 深金 */
    --color-red: #8b1a2a;           /* 暗红（印章色）*/
    --color-bg: #f5f0e8;            /* 米白背景 */
    --color-bg-dark: #ede8df;       /* 深米白 */
    --color-text: #162040;          /* 主文字 */
    --color-text-light: #5a6a8a;    /* 次文字 */
    --color-white: #ffffff;
    --color-border: #d4a843;        /* 金色边框 */

    --font-zh: 'Source Han Serif CN', 'Noto Serif SC', '宋体', STSong, serif;
    --font-en: 'Cormorant Garamond', 'Times New Roman', serif;
    --transition: all 0.35s ease;
    --shadow: 0 8px 32px rgba(26, 47, 110, 0.12);
    --shadow-gold: 0 4px 20px rgba(201, 162, 39, 0.25);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: clip;
    width: 100%;
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: var(--font-zh);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.7;
    overflow-x: clip;
    width: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- 公用容器 ---- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ---- 公用标题装饰 ---- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-header .zh-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 8px;
}
.section-header .en-title {
    font-family: var(--font-en);
    font-size: 1rem;
    color: var(--color-gold);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 20px;
}
.section-header .divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.section-header .divider::before,
.section-header .divider::after {
    content: '';
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gold));
}
.section-header .divider::after {
    background: linear-gradient(90deg, var(--color-gold), transparent);
}
.section-header .divider-icon {
    width: 10px;
    height: 10px;
    background: var(--color-gold);
    transform: rotate(45deg);
}

/* ---- 公用按钮 ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: var(--color-white);
    font-size: 1rem;
    letter-spacing: 0.1em;
    border-radius: 2px;
    transition: var(--transition);
    box-shadow: var(--shadow-gold);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(201, 162, 39, 0.4);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 34px;
    border: 1px solid var(--color-gold);
    color: var(--color-gold);
    font-size: 1rem;
    letter-spacing: 0.1em;
    border-radius: 2px;
    transition: var(--transition);
}
.btn-outline:hover {
    background: var(--color-gold);
    color: var(--color-white);
}
.btn-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    background: var(--color-white);
    color: var(--color-primary);
    font-size: 1rem;
    letter-spacing: 0.1em;
    border-radius: 2px;
    transition: var(--transition);
}
.btn-white:hover {
    background: var(--color-gold);
    color: var(--color-white);
}

/* ---- 顶部导航 ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: var(--color-primary-dark);
    transition: var(--transition);
}
.site-header.transparent {
    background: transparent;
}
.site-header.scrolled {
    background: var(--color-primary-dark);
    border-bottom: 1px solid rgba(201,162,39,0.15);
    box-shadow: none;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}
.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.site-logo img {
    height: 56px;
    width: auto;
}
.site-nav {
    display: flex;
    align-items: center;
    gap: 0;
}
.site-nav a {
    padding: 0 20px;
    height: 80px;
    display: flex;
    align-items: center;
    color: rgba(255,255,255,0.9);
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    position: relative;
    transition: var(--transition);
}
.site-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition);
}
.site-nav a:hover,
.site-nav a.active {
    color: var(--color-gold);
}
.site-nav a:hover::after,
.site-nav a.active::after {
    width: 60%;
}
.header-contact {
    display: flex;
    align-items: center;
    gap: 16px;
}
.header-phone {
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}
.header-phone span {
    color: var(--color-gold);
    font-weight: 600;
}

/* ---- 移动端汉堡菜单 ---- */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
    display: block;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- 底部Footer ---- */
.site-footer {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.8);
    position: relative;
    overflow: hidden;
}
.footer-top-border {
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}
.footer-pattern {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(201,162,39,0.03) 20px,
        rgba(201,162,39,0.03) 40px
    );
    pointer-events: none;
}
.footer-main {
    padding: 60px 0 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
}
.footer-brand .footer-logo {
    height: 44px;
    margin-bottom: 16px;
    /* filter: brightness(0) invert(1); */
}
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
    margin-bottom: 20px;
}
.footer-col h4 {
    color: var(--color-gold);
    font-size: 1rem;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(201,162,39,0.3);
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
    transition: var(--transition);
}
.footer-col ul li a:hover {
    color: var(--color-gold);
    padding-left: 4px;
}
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.65);
}
.footer-contact-item .icon {
    color: var(--color-gold);
    flex-shrink: 0;
    margin-top: 2px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* ---- 动画 ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
.fade-in-up { animation: fadeInUp 0.7s ease both; }
.fade-in { animation: fadeIn 0.7s ease both; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .container { padding: 0 24px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .site-nav { display: none; }
    .hamburger { display: flex; }
    .header-phone { display: none; }
    .section-header .zh-title { font-size: 1.8rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}