:root {
    --brand: #c8102e;
    --brand-dark: #a50d26;
    --brand-light: #fdf2f3;
    --text-main: #2c2c2c;
    --text-sub: #666;
    --text-muted: #999;
    --bg-page: #f7f5f3;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; max-width: 100%; overflow-x: hidden; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
    color: var(--text-main);
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
}
ul { list-style: none; }
a { text-decoration: none; }
img { width: 100%; max-width: 100%; display: block; }

.container { width: 1200px; margin: 0 auto; }
@media (max-width: 1220px) { .container { width: 96%; } }

.banner-red-mask {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 2;
    background: linear-gradient(to bottom, rgba(161,53,56,.72) 0%, rgba(161,53,56,.28) 20%, rgba(161,53,56,0) 48%);
    pointer-events: none;
}

/* ===== 顶部导航 ===== */
.top-nav { position: absolute; top: 0; left: 0; width: 100%; z-index: 99; }
.nav-inner { width: 100%; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; height: 130px; padding-top: 6px; }
.nav-left { display: flex; align-items: center; justify-content: flex-end; }
.nav-right { display: flex; align-items: center; justify-content: flex-start; }
.logo-box { flex-shrink: 0; padding: 4px 24px; text-align: center; }
.logo-box img {
    height: 120px; width: auto; max-width: 200px; margin: 0 auto; object-fit: contain;
    filter: drop-shadow(0 3px 10px rgba(0,0,0,0.3));
}
.menu-item { position: relative; padding: 8px 36px; flex-shrink: 0; }
.menu-item > a {
    color: #ffffff; font-size: 22px; font-weight: 600; letter-spacing: 2px;
    position: relative; transition: opacity .25s;
}
.menu-item > a:hover { color: #ffffff; opacity: .9; }
.menu-item.active > a { color: #ffffff; }
.submenu {
    position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    background: #ffffff; min-width: 150px; box-shadow: 0 12px 32px rgba(0,0,0,.15);
    display: none; border-radius: 8px; overflow: hidden; z-index: 100; padding: 6px 0;
}
.submenu li a {
    display: block; padding: 11px 18px; color: #333; font-size: 15px;
    white-space: nowrap; text-align: center; transition: all .2s;
}
.submenu li a:hover { background: var(--brand-light); color: var(--brand); padding-left: 24px; }
.menu-item:hover .submenu { display: block; }
.hamburger { display: none; flex-direction: column; gap: 4px; flex-shrink: 0; cursor: pointer; justify-self: end; }
.hamburger span { width: 24px; height: 2px; background: #fff; border-radius: 1px; }

/* ===== 移动端菜单 ===== */
.mobile-menu {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    height: 100vh; height: 100dvh;
    background: rgba(18,18,18,0.97); z-index: 9999;
    overflow-y: auto; overflow-x: hidden;
    -webkit-overflow-scrolling: touch; overscroll-behavior: contain;
}
.mobile-menu.show { display: block; }
.mobile-menu-header {
    position: sticky; top: 0; z-index: 2;
    display: flex; justify-content: space-between; align-items: center;
    height: 56px; padding: 0 24px;
    background: rgba(12,12,12,0.98); border-bottom: 1px solid rgba(255,255,255,0.1);
}
.mobile-menu-header .menu-title { color: #fff; font-size: 17px; font-weight: 600; letter-spacing: 1px; }
.mobile-menu-close {
    width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: #fff; font-size: 26px; font-weight: 300; line-height: 1;
    border-radius: 50%; transition: background .3s; user-select: none;
}
.mobile-menu-close:hover, .mobile-menu-close:active { background: rgba(255,255,255,0.15); }
.mobile-menu-item { display: block; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.1); }
.mobile-menu-item > a { display: block; width: 100%; color: #ffffff; padding: 15px 24px; font-size: 17px; font-weight: 600; }
.mobile-submenu { width: 100%; background: rgba(255,255,255,0.03); display: none; }
.mobile-submenu.show { display: block; }
.mobile-submenu a {
    display: block !important; width: 100%; padding: 13px 44px !important;
    color: rgba(255,255,255,.82); font-size: 15px;
    border-bottom: 1px solid rgba(255,255,255,.05); transition: all .2s;
}
.mobile-submenu a:hover { background: rgba(255,255,255,.07); color: #fff; padding-left: 48px !important; }

/* ===== 留言区 ===== */
.msg-area { position: relative; padding: 70px 0; overflow: hidden; width: 100%; }
.msg-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.msg-bg img { width: 100%; height: 100%; object-fit: cover; }
.msg-bg::after {
    content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(180,30,40,.75) 0%, rgba(150,20,35,.68) 100%);
}
.msg-content { position: relative; z-index: 1; }
.msg-header-row { display: flex; align-items: baseline; gap: 20px; margin-bottom: 32px; flex-wrap: wrap; }
.msg-area h2 {
    color: #fff; font-size: 36px; font-weight: bold; margin-bottom: 0;
    text-shadow: 0 2px 12px rgba(0,0,0,.25); letter-spacing: 2px;
}
.msg-area .msg-sub { color: rgba(255,255,255,.9); font-size: 16px; margin-bottom: 0; letter-spacing: 1px; }
.msg-input-row { display: flex; gap: 14px; align-items: center; }
.msg-input-row input {
    flex: 1; min-width: 0; padding: 14px 18px; border: none; border-radius: 8px;
    font-size: 15px; outline: none; background: rgba(255,255,255,.96);
    transition: box-shadow .25s; width: 100%;
}
.msg-input-row input:focus { box-shadow: 0 0 0 3px rgba(255,255,255,.3); }
.msg-input-row .captcha-img {
    flex: 0 0 130px; height: 48px; width: 130px; background: #fff;
    border-radius: 8px; cursor: pointer; object-fit: cover;
}
.msg-input-row button {
    flex: 0 0 140px; padding: 14px 20px;
    background: var(--brand); color: #fff; border: 2px solid #fff;
    border-radius: 8px; font-size: 16px; font-weight: bold;
    cursor: pointer; letter-spacing: 2px; transition: all .25s;
}
.msg-input-row button:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.2); }
.msg-input-row button:disabled { opacity: .6; cursor: not-allowed; transform: none; box-shadow: none; }

/* ===== 页脚 ===== */
footer { background: #f5f2f0; padding: 56px 0 30px; width: 100%; }
.footer-top {
    display: flex; justify-content: space-between; align-items: center;
    padding-bottom: 44px; border-bottom: 1px solid #e8e4e0; gap: 30px;
}
.footer-logo { display: flex; align-items: center; flex-shrink: 0; }
.footer-logo img { width: auto; height: 120px; max-width: 240px; object-fit: contain; }
.footer-qrcode { text-align: center; flex: 1; min-width: 0; display: flex; flex-direction: column; justify-content: center; }
.footer-qrcode p { font-size: 14px; color: var(--text-sub); margin-bottom: 4px; letter-spacing: 1px; }
.footer-social { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; justify-content: center; align-items: center; }
.footer-social a {
    width: 42px; height: 42px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    position: relative; transition: transform .3s, box-shadow .3s; flex-shrink: 0;
}
.footer-social a:hover { transform: translateY(-4px); box-shadow: 0 6px 18px rgba(0,0,0,.22); }
.footer-social a svg { width: 20px; height: 20px; fill: #fff; }
.social-douyin { background: #000; }
.social-xhs { background: #ff2442; }
.social-bilibili { background: #fb7299; }
.social-sph { background: #07c160; }
.social-weibo { background: #e6162d; }
.social-baidu { background: #2932e1; }
.social-gzh { background: #06ad56; }
.social-toutiao { background: #f04142; }
.social-sohu { background: #ff6600; }
.social-qrcode {
    position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
    width: 120px; padding: 8px; background: #fff; border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,.2); opacity: 0; visibility: hidden;
    transition: opacity .3s, visibility .3s; margin-bottom: 12px; z-index: 10;
}
.social-qrcode img { width: 100%; height: auto; border-radius: 4px; }
.social-qrcode::after {
    content: ""; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    border: 8px solid transparent; border-top-color: #fff;
}
.footer-social a:hover .social-qrcode { opacity: 1; visibility: visible; }
.footer-social a.show-qrcode .social-qrcode { opacity: 1; visibility: visible; }
.footer-hotline { text-align: right; flex-shrink: 0; display: flex; flex-direction: column; justify-content: center; }
.footer-hotline .hotline-label { font-size: 15px; color: var(--text-sub); margin-bottom: 8px; letter-spacing: 1px; }
.footer-hotline .hotline-label::after {
    content: ""; display: block; width: 44px; height: 2px;
    background: var(--brand); margin-top: 8px; margin-left: auto; border-radius: 1px;
}
.footer-hotline .hotline-num {
    font-size: 38px; font-weight: bold; color: var(--brand);
    letter-spacing: 2px; line-height: 1.1;
}
.footer-links { display: grid; grid-template-columns: repeat(7, 1fr); gap: 24px; padding: 44px 0; }
.footer-link-col { min-width: 0; }
.footer-link-col h4 { font-size: 16px; color: var(--text-main); margin-bottom: 16px; font-weight: bold; }
.footer-link-col li { margin-bottom: 10px; overflow: hidden; }
.footer-link-col li a {
    font-size: 14px; color: var(--text-muted);
    transition: color .3s, padding-left .3s;
    display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.footer-link-col li a:hover { color: var(--brand); padding-left: 4px; }
.footer-friend { padding: 22px 0; border-top: 1px solid #e8e4e0; font-size: 13px; color: var(--text-muted); }
.footer-friend a { color: var(--text-muted); margin-right: 18px; transition: color .3s; }
.footer-friend a:hover { color: var(--brand); }
.footer-bottom { padding-top: 22px; border-top: 1px solid #e8e4e0; font-size: 13px; color: #aaa; }

/* ===== 响应式 ===== */
@media (max-width: 1440px) {
    .menu-item { padding: 8px 28px; }
    .menu-item > a { font-size: 20px; letter-spacing: 1px; }
    .logo-box { padding: 4px 20px; }
    .logo-box img { height: 100px; max-width: 170px; }
    .nav-inner { height: 116px; padding-top: 6px; }
}
@media (max-width: 1200px) {
    html, body { overflow-x: hidden; max-width: 100%; }
    body { position: relative; }
    .nav-inner { grid-template-columns: auto auto; justify-content: space-between; align-items: center; padding-top: 20px; height: 60px; }
    .nav-left, .nav-right { display: none; }
    .hamburger { display: flex; }
    .logo-box { padding: 4px 0; }
    .logo-box img { height: 56px; max-width: 100px; filter: none; }
    .msg-header-row { margin-bottom: 22px; }
    .msg-input-row { flex-wrap: wrap; }
    .msg-input-row input { flex: 1 1 200px; }
    .footer-links { grid-template-columns: repeat(3, 1fr); gap: 20px 24px; padding: 36px 0; }
    .footer-top { flex-direction: column; gap: 32px; align-items: center; text-align: center; }
    .footer-logo img { height: 90px; max-width: 180px; }
    .footer-qrcode, .footer-hotline { display: block; }
    .footer-hotline { text-align: center; }
    .footer-hotline .hotline-label::after { margin: 8px auto 0; }
    .footer-bottom { text-align: center; }
    footer { padding-bottom: 60px; }
}
@media (max-width: 768px) {
    .msg-area { padding: 60px 0; }
    .msg-area h2 { font-size: 28px; }
    .msg-input-row { flex-direction: row; flex-wrap: wrap; gap: 12px; align-items: stretch; }
    .msg-input-row input { width: 100%; flex: 1 1 100%; }
    .msg-input-row input#captchaInput { flex: 1 1 calc(100% - 122px); min-width: 0; }
    .msg-input-row .captcha-img { flex: 0 0 110px !important; width: 110px !important; height: 50px !important; object-fit: fill; border-radius: 8px; }
    .msg-input-row button { flex: 1 1 100%; width: 100%; }
    .footer-social a { width: 38px; height: 38px; }
    .footer-social a svg { width: 19px; height: 19px; }
    .footer-logo img { height: 70px; max-width: 140px; }
    .social-qrcode { width: 110px; }
    .mobile-menu-header { height: 52px; padding: 0 20px; }
    .mobile-menu-header .menu-title { font-size: 16px; }
    .mobile-menu-close { width: 32px; height: 32px; font-size: 24px; }
}
@media (max-width: 600px) {
    .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px 20px; padding: 32px 0; }
    .footer-link-col h4 { font-size: 15px; margin-bottom: 12px; }
    .footer-link-col li { margin-bottom: 8px; }
    .footer-link-col li a { font-size: 13px; }
}
/* （注：内容由AI生成） */