/* =====================================================================
   www.hnrmb.com 日语机构网 - 和风主题样式
   设计基调：朱红 × 墨色 × 和纸 × 金色，传统日式与现代排版结合
   （与参考 demo 的蓝紫渐变风格完全区分）
   ===================================================================== */

:root{
    --vermilion:#C73E3A;      /* 朱红 */
    --vermilion-deep:#A9322E; /* 深朱红 */
    --ink:#2A2D33;            /* 墨色 */
    --ink-2:#3B3F47;          /* 深灰墨 */
    --ink-soft:#5A5F68;       /* 浅墨 */
    --paper:#FBF7EF;          /* 和纸暖白 */
    --paper-deep:#F1EADB;     /* 深和纸 */
    --gold:#B98A2F;           /* 金 */
    --gold-light:#D8B56A;     /* 浅金 */
    --line:#E2D9C6;           /* 茶色描边 */
    --white:#FFFFFF;
    --maxw:1160px;
    --header-h:64px;
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",SimSun,serif;
    --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
    margin:0;
    font-family:var(--sans);
    background:var(--paper);
    background-image:radial-gradient(rgba(42,45,51,.028) 1px, transparent 1.4px);
    background-size:22px 22px;
    color:var(--ink);
    line-height:1.9;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
img{max-width:100%;}

/* ===== 顶部朱红细线 ===== */
body::before{
    content:"";display:block;height:4px;
    background:linear-gradient(90deg,var(--vermilion) 0 72%,var(--gold) 72% 100%);
}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--ink);box-shadow:0 4px 18px rgba(42,45,51,.25);}
.header-inner{
    max-width:var(--maxw);margin:0 auto;height:var(--header-h);
    display:flex;align-items:center;gap:28px;padding:0 20px;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0;}
.brand-seal{
    width:38px;height:38px;border-radius:7px;
    background:var(--vermilion);color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-family:var(--serif);font-size:21px;font-weight:700;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.25);
}
.brand-text{color:#fff;font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:2px;line-height:1.25;display:flex;flex-direction:column;}
.brand-text em{font-style:normal;font-family:var(--sans);font-size:10px;font-weight:400;color:var(--gold-light);letter-spacing:2px;}
.nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap;}
.nav a{
    text-decoration:none;color:#D8DAD6;font-size:15px;padding:8px 13px;
    position:relative;transition:.2s;
}
.nav a:hover{color:#fff;}
.nav a::after{
    content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
    background:var(--vermilion);transform:scaleX(0);transition:.2s;transform-origin:left;
}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1);}
.nav a.active{color:#fff;font-weight:700;}

/* ===== 首页 Hero ===== */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero::before{
    content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
    background:radial-gradient(circle, rgba(199,62,58,.16) 0 42%, transparent 43% 58%, rgba(199,62,58,.12) 59% 62%, transparent 63%);
}
.hero::after{
    content:"日本語";position:absolute;right:26px;top:50%;transform:translateY(-50%);
    writing-mode:vertical-rl;letter-spacing:10px;
    font-family:var(--serif);font-size:20px;color:rgba(199,62,58,.28);user-select:none;
}
.hero .wrap{
    max-width:var(--maxw);margin:0 auto;
    padding:clamp(52px,8vw,92px) 20px;
    position:relative;z-index:1;
}
.hero .eyebrow{
    display:inline-flex;align-items:center;gap:10px;
    font-size:13px;font-weight:600;color:var(--vermilion);
    margin:0 0 22px;letter-spacing:3px;
}
.hero .eyebrow::before{content:"";width:26px;height:2px;background:var(--vermilion);}
.hero .eyebrow::after{content:"";width:7px;height:7px;background:var(--gold);transform:rotate(45deg);}
.hero h1{
    font-family:var(--serif);
    font-size:clamp(30px,5.2vw,50px);
    line-height:1.35;font-weight:800;letter-spacing:2px;
    margin:0 0 20px;max-width:15em;color:var(--ink);
}
.hero h1 .red{color:var(--vermilion);}
.hero p.lead{font-size:clamp(15px,2vw,17px);color:var(--ink-soft);max-width:36em;margin:0 0 34px;}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;}
.btn{
    display:inline-flex;align-items:center;gap:8px;text-decoration:none;
    font-size:15px;font-weight:600;padding:12px 30px;
    border:1px solid transparent;cursor:pointer;transition:.2s;
}
.btn-vermilion{background:var(--vermilion);color:#fff;}
.btn-vermilion:hover{background:var(--vermilion-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(199,62,58,.3);}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-outline:hover{color:var(--vermilion);border-color:var(--vermilion);}
.stats{
    display:flex;gap:clamp(22px,5vw,56px);flex-wrap:wrap;margin-top:clamp(36px,6vw,54px);
    border-top:1px solid var(--line);padding-top:26px;
}
.stats .stat b{display:block;font-family:var(--serif);font-size:clamp(26px,4vw,34px);font-weight:800;color:var(--vermilion);line-height:1.3;}
.stats .stat span{font-size:13px;color:var(--ink-soft);letter-spacing:1px;}

/* ===== 通用区块 ===== */
.section{padding:clamp(40px,6vw,68px) 0;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section-head{text-align:center;margin-bottom:clamp(26px,4vw,44px);position:relative;}
.section-head .orn{display:inline-flex;align-items:center;gap:10px;margin-bottom:12px;}
.section-head .orn::before,.section-head .orn::after{content:"";width:34px;height:1px;background:var(--gold);}
.section-head .orn i{width:7px;height:7px;background:var(--vermilion);transform:rotate(45deg);}
.section-head h2{font-family:var(--serif);font-size:clamp(23px,3.6vw,32px);font-weight:800;letter-spacing:3px;margin:0 0 10px;}
.section-head p{color:var(--ink-soft);font-size:15px;margin:0 auto;max-width:34em;}

/* ===== 栏目卡片 ===== */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.cat-card{
    display:block;text-decoration:none;color:inherit;background:var(--white);
    border:1px solid var(--line);border-radius:6px;position:relative;
    padding:30px 26px 26px;transition:.25s;overflow:hidden;
}
.cat-card::before{
    content:"";position:absolute;left:0;top:0;right:0;height:3px;
    background:var(--vermilion);transform:scaleX(0);transform-origin:left;transition:.25s;
}
.cat-card:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(42,45,51,.10);border-color:var(--vermilion);}
.cat-card:hover::before{transform:scaleX(1);}
.cat-stamp{
    width:56px;height:56px;border-radius:50%;
    border:2px solid var(--vermilion);color:var(--vermilion);
    display:flex;align-items:center;justify-content:center;
    font-family:var(--serif);font-size:24px;font-weight:700;
    margin-bottom:16px;transform:rotate(-6deg);
    background:radial-gradient(circle, rgba(199,62,58,.07) 55%, transparent 56%);
}
.cat-card h3{font-family:var(--serif);font-size:20px;font-weight:800;letter-spacing:2px;margin:0 0 8px;}
.cat-card p{font-size:13.5px;color:var(--ink-soft);margin:0 0 16px;line-height:1.8;}
.cat-more{font-size:13.5px;font-weight:700;color:var(--vermilion);display:inline-flex;align-items:center;gap:6px;}
.cat-more::before{content:"▸";font-size:14px;}
.cat-card:hover .cat-more{gap:10px;}

/* ===== 文章卡片（首页热门） ===== */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post-card{
    display:flex;flex-direction:column;text-decoration:none;color:inherit;
    background:var(--white);border:1px solid var(--line);border-radius:6px;
    padding:24px 24px 20px;transition:.25s;position:relative;
}
.post-card:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(42,45,51,.10);border-color:var(--gold);}
.post-card .p-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.p-tag{
    font-size:11.5px;font-weight:700;color:var(--vermilion);
    border:1px solid var(--vermilion);border-radius:4px;padding:1px 9px;letter-spacing:1px;
}
.p-tag.gold{color:var(--gold);border-color:var(--gold);}
.post-card h3{
    font-family:var(--serif);font-size:17.5px;font-weight:800;line-height:1.55;
    margin:0 0 10px;transition:.2s;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover h3{color:var(--vermilion);}
.post-card .p-excerpt{
    font-size:13.5px;color:var(--ink-soft);line-height:1.8;margin:0 0 16px;flex:1;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .p-meta{font-size:12.5px;color:#9A9182;display:flex;align-items:center;gap:8px;border-top:1px dashed var(--line);padding-top:12px;}
.post-card .p-meta b{color:var(--ink-soft);font-weight:600;}
.post-empty{grid-column:1/-1;text-align:center;color:var(--ink-soft);font-size:14px;padding:24px 0;}

/* ===== 特色（墨色band） ===== */
.features{background:var(--ink);background-image:radial-gradient(rgba(255,255,255,.05) 1px, transparent 1.4px);background-size:24px 24px;}
.features .section-head h2{color:#fff;}
.features .section-head p{color:#A8ADB4;}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.feature{text-align:center;padding:14px 8px;color:#fff;}
.feature .f-icon{
    width:54px;height:54px;margin:0 auto 16px;border-radius:6px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(199,62,58,.16);border:1px solid rgba(199,62,58,.5);color:var(--gold-light);
}
.feature .f-icon svg{width:26px;height:26px;}
.feature h3{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:2px;margin:0 0 8px;color:#fff;}
.feature p{font-size:13px;color:#A8ADB4;margin:0;line-height:1.8;}

/* ===== CTA ===== */
.cta-band .box{
    background:linear-gradient(120deg,var(--vermilion),var(--vermilion-deep) 55%,#8F2624);
    border-radius:8px;padding:clamp(34px,5vw,56px);text-align:center;color:#fff;
    box-shadow:0 18px 44px rgba(169,50,46,.35);position:relative;overflow:hidden;
}
.cta-band .box::before{
    content:"日本語を学ぼう";position:absolute;left:14px;top:14px;writing-mode:vertical-rl;letter-spacing:6px;
    font-family:var(--serif);font-size:13px;color:rgba(255,255,255,.3);user-select:none;
}
.cta-band h2{font-family:var(--serif);font-size:clamp(22px,3.6vw,32px);font-weight:800;letter-spacing:3px;margin:0 0 14px;}
.cta-band p{font-size:15px;opacity:.94;margin:0 0 28px;max-width:34em;margin-inline:auto;}
.cta-band .btn-white{background:#fff;color:var(--vermilion);}
.cta-band .btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.22);}

/* ===== 面包屑 ===== */
.breadcrumb{font-size:13px;color:#9A9182;display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:18px;}
.breadcrumb a{text-decoration:none;color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--vermilion);}
.breadcrumb .sep{color:var(--gold);}

/* ===== 内容页/栏目页布局 ===== */
.container{max-width:var(--maxw);margin:0 auto;padding:26px 20px 56px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start;}
.card{
    background:var(--white);border:1px solid var(--line);border-radius:6px;
    padding:clamp(22px,4vw,44px);min-width:0;position:relative;
}
.card::before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:linear-gradient(90deg,var(--vermilion) 0 68%,var(--gold) 68% 100%);}

.article-title{font-family:var(--serif);font-size:clamp(24px,4vw,36px);line-height:1.4;font-weight:800;letter-spacing:2px;margin:0 0 16px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:#9A9182;margin:0 0 26px;padding-bottom:20px;border-bottom:1px dashed var(--line);}
.article-meta .author{display:inline-flex;align-items:center;gap:8px;color:var(--ink-soft);font-weight:600;}
.article-meta .avatar{width:28px;height:28px;border-radius:50%;background:var(--vermilion);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;}
.article-meta .sep{color:var(--gold);}

/* ===== 正文排版 ===== */
.article-body{font-size:16.5px;color:#3A3E44;line-height:2;}
.article-body p{margin:0 0 1.3em;}
.article-body img{max-width:100%;height:auto;border-radius:4px;display:block;margin:1.6em auto;border:1px solid var(--line);padding:6px;background:var(--paper);}
.article-body a{color:var(--vermilion);text-decoration:none;border-bottom:1px solid rgba(199,62,58,.4);}
.article-body a:hover{border-bottom-color:var(--vermilion);}
.article-body h2,.article-body h3{font-family:var(--serif);font-weight:800;letter-spacing:1px;line-height:1.5;margin:1.7em 0 .7em;}
.article-body h2{font-size:1.35em;padding-left:14px;border-left:4px solid var(--vermilion);}
.article-body h3{font-size:1.16em;color:var(--ink-2);padding-left:16px;position:relative;}
.article-body h3::before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;background:var(--gold);transform:rotate(45deg);}
.article-body blockquote{
    margin:1.5em 0;padding:.7em 1.3em;
    border-left:4px solid var(--gold);background:var(--paper-deep);border-radius:0 4px 4px 0;
    color:var(--ink-soft);
}
.article-body ul,.article-body ol{padding-left:1.5em;}
.article-body strong{color:var(--vermilion-deep);}
.article-footer{margin-top:38px;padding-top:20px;border-top:1px dashed var(--line);font-size:13.5px;color:#9A9182;}
.article-footer a{color:var(--vermilion);text-decoration:none;font-weight:600;}

/* ===== 栏目文章列表 ===== */
.post-list{list-style:none;margin:0;padding:0;}
.post-list li{padding:22px 0;border-bottom:1px dashed var(--line);display:flex;gap:18px;align-items:flex-start;}
.post-list li:last-child{border-bottom:0;}
.post-list .p-date{
    flex:0 0 64px;text-align:center;border:1px solid var(--line);border-top:3px solid var(--vermilion);
    border-radius:4px;padding:8px 4px;background:var(--paper);
}
.post-list .p-date b{display:block;font-family:var(--serif);font-size:19px;color:var(--vermilion);line-height:1.2;}
.post-list .p-date span{font-size:11px;color:var(--ink-soft);}
.post-list .p-main a{text-decoration:none;}
.post-list .p-title{font-family:var(--serif);font-size:19px;font-weight:800;line-height:1.5;margin:0 0 8px;transition:.2s;}
.post-list li:hover .p-title{color:var(--vermilion);}
.post-list .p-excerpt{font-size:13.5px;color:var(--ink-soft);margin:0 0 8px;line-height:1.8;}
.post-list .p-meta{font-size:12.5px;color:#9A9182;}

/* 栏目头图 */
.cat-banner{
    background:var(--ink);color:#fff;border-radius:6px;padding:34px 34px;
    position:relative;overflow:hidden;margin-bottom:22px;
}
.cat-banner::before{
    content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;border-radius:50%;
    background:radial-gradient(circle, rgba(199,62,58,.35) 0 44%, transparent 45%);
}
.cat-banner .cat-name{font-family:var(--serif);font-size:clamp(24px,3.6vw,32px);font-weight:800;letter-spacing:4px;margin:0 0 8px;}
.cat-banner p{margin:0;color:#A8ADB4;font-size:14px;}
.cat-banner .en{display:block;font-size:11px;letter-spacing:4px;color:var(--gold-light);margin-top:6px;}

/* ===== 侧边栏 ===== */
.sidebar{position:sticky;top:calc(var(--header-h) + 20px);display:flex;flex-direction:column;gap:20px;}
.widget{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:22px;}
.widget h3{
    margin:0 0 16px;font-family:var(--serif);font-size:16px;font-weight:800;letter-spacing:2px;
    display:flex;align-items:center;gap:9px;
}
.widget h3 i{width:5px;height:18px;background:var(--vermilion);border-radius:2px;}
.widget p{margin:0 0 10px;font-size:13.5px;color:var(--ink-soft);line-height:1.9;}
.hot-list{list-style:none;margin:0;padding:0;counter-reset:hot;}
.hot-list li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--line);}
.hot-list li:last-child{border-bottom:0;}
.hot-list li::before{
    counter-increment:hot;content:counter(hot, cjk-ideographic);
    flex:0 0 26px;height:26px;border-radius:4px;margin-top:2px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:12px;font-weight:700;color:#fff;background:var(--ink);letter-spacing:0;
}
.hot-list li:nth-child(-n+3)::before{background:var(--vermilion);}
.hot-list a{text-decoration:none;color:var(--ink-soft);font-size:13.5px;line-height:1.7;transition:.2s;}
.hot-list a:hover{color:var(--vermilion);}
.widget-empty{font-size:13px;color:#9A9182;}
.side-cats{list-style:none;margin:0;padding:0;}
.side-cats li{border-bottom:1px dashed var(--line);}
.side-cats li:last-child{border-bottom:0;}
.side-cats a{display:flex;justify-content:space-between;align-items:center;text-decoration:none;color:var(--ink-soft);font-size:14px;padding:10px 2px;transition:.2s;}
.side-cats a::after{content:"›";color:var(--gold);font-size:16px;}
.side-cats a:hover{color:var(--vermilion);padding-left:8px;}
.widget-tip{border-top:3px solid var(--gold);}

/* ===== 分页 ===== */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:30px;flex-wrap:wrap;}
.pagination a,.pagination span{
    display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;
    border:1px solid var(--line);border-radius:4px;text-decoration:none;font-size:13.5px;color:var(--ink-soft);background:var(--white);
}
.pagination .current{background:var(--vermilion);color:#fff;border-color:var(--vermilion);font-weight:700;}
.pagination a:hover{border-color:var(--vermilion);color:var(--vermilion);}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);margin-top:20px;}
.footer-top{height:5px;background:repeating-linear-gradient(45deg,var(--vermilion) 0 14px,transparent 14px 28px);}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:44px 20px 26px;display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:34px;}
.f-brand{font-family:var(--serif);font-weight:800;font-size:19px;letter-spacing:3px;margin:0 0 12px;color:#fff;}
.site-footer p{margin:0 0 8px;font-size:13.5px;color:#A8ADB4;line-height:1.9;}
.site-footer h4{margin:0 0 14px;font-size:14px;font-weight:700;color:var(--gold-light);letter-spacing:2px;}
.site-footer ul{list-style:none;margin:0;padding:0;}
.site-footer ul li{margin-bottom:9px;}
.site-footer ul a{text-decoration:none;color:#A8ADB4;font-size:13.5px;transition:.2s;}
.site-footer ul a:hover{color:#fff;}
.f-contact{color:var(--gold-light)!important;}
.copyright{max-width:var(--maxw);margin:0 auto;padding:18px 20px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:12.5px;color:#7E848C;}
.copyright a{color:#A8ADB4;text-decoration:none;}
.copyright a:hover{color:var(--gold-light);}

/* ===== 响应式 ===== */
@media (max-width:900px){
    .cat-grid,.post-grid{grid-template-columns:repeat(2,1fr);}
    .feature-grid{grid-template-columns:repeat(2,1fr);}
    .container{grid-template-columns:1fr;}
    .sidebar{position:static;}
    .footer-inner{grid-template-columns:1fr;gap:24px;}
    .hero::after{display:none;}
}
@media (max-width:600px){
    .nav{display:none;}
    .cat-grid,.post-grid{grid-template-columns:1fr;}
    .feature-grid{grid-template-columns:1fr;}
    .brand-text em{display:none;}
}