/* ═══════════════════════════════════════════════════════
   haojunsheng.com — 设计系统
   风格：东方文人 × 现代编辑（暖纸 / 墨绿 / 暖金 / 印章红）
   ═══════════════════════════════════════════════════════ */

:root{
  --paper:#FAF7F2;        /* 米白纸色 */
  --paper-2:#F3EDE2;      /* 深一度的纸 */
  --ink:#221F1A;          /* 墨色正文 */
  --green:#2D4A3E;        /* 墨绿主色 */
  --green-2:#3D6152;      /* 亮墨绿 */
  --gold:#B8922E;         /* 暖金点缀 */
  --seal:#B03A2E;         /* 印章红 */
  --sub:#6E675C;          /* 次要文字 */
  --line:#E4DACA;         /* 分隔线 */
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.9;
  font-size:16px;
  letter-spacing:.02em;
  /* 纸张纹理 */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(184,146,46,0.025) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(45,74,62,0.02) 0%, transparent 50%);
}
::selection{background:rgba(184,146,46,.25)}

h1,h2,h3,.serif{font-family:var(--serif)}
a{color:var(--green);text-decoration:none}
img{max-width:100%}

.wrap{max-width:1040px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 24px}

/* ── 导航 ── */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(250,247,242,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{max-width:1040px;margin:0 auto;padding:16px 24px;display:flex;align-items:center;gap:28px}
.nav-name{font-family:var(--serif);font-size:1.25em;font-weight:700;color:var(--ink);letter-spacing:.15em}
.nav-name .seal-dot{display:inline-block;width:.5em;height:.5em;background:var(--seal);margin-left:.35em;vertical-align:baseline}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav-links a{font-size:.92em;color:var(--sub);letter-spacing:.08em;padding:2px 0;border-bottom:2px solid transparent;transition:all .25s}
.nav-links a:hover{color:var(--green)}
.nav-links a.active{color:var(--green);border-bottom-color:var(--gold)}
.nav-lang{font-size:.82em;color:var(--sub);border:1px solid var(--line);padding:3px 10px;border-radius:2px;transition:all .25s}
.nav-lang:hover{border-color:var(--gold);color:var(--gold)}

/* ── 印章 ── */
.seal{
  display:inline-flex;align-items:center;justify-content:center;
  width:64px;height:64px;background:var(--seal);color:#fff;
  font-family:var(--serif);font-weight:700;font-size:1.15em;
  line-height:1.25;text-align:center;letter-spacing:.05em;
  box-shadow:2px 2px 0 rgba(176,58,46,.2);
  writing-mode:vertical-rl;padding:6px;
}
.seal-sm{width:44px;height:44px;font-size:.8em}

/* ── 竖排装饰 ── */
.vertical-mark{
  writing-mode:vertical-rl;font-family:var(--serif);
  color:var(--gold);font-size:.85em;letter-spacing:.5em;opacity:.65;
  user-select:none;
}

/* ── Hero ── */
.hero{padding:110px 0 90px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.hero h1{font-size:2.8em;font-weight:700;line-height:1.4;letter-spacing:.06em;color:var(--ink)}
.hero h1 em{font-style:normal;color:var(--green);border-bottom:6px solid rgba(184,146,46,.3)}
.hero .tagline{margin-top:22px;font-size:1.12em;color:var(--sub);line-height:2.1}
.hero-photo{
  aspect-ratio:3/4;background:linear-gradient(160deg,var(--paper-2),#E8DFCE);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  position:relative;
}
.hero-photo .ph-hint{font-family:var(--serif);color:var(--sub);opacity:.5;font-size:.9em;letter-spacing:.3em;writing-mode:vertical-rl}
.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:48% 22%;display:block}
.hero-photo::after{
  content:'';position:absolute;inset:12px;border:1px solid rgba(184,146,46,.35);pointer-events:none;
}

/* ── 章节 ── */
.section{padding:72px 0}
.section-alt{background:var(--paper-2)}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:40px}
.sec-head h2{font-size:1.7em;letter-spacing:.12em;color:var(--ink)}
.sec-head .en{font-size:.8em;color:var(--gold);letter-spacing:.25em;text-transform:uppercase}
.sec-head::after{content:'';flex:1;height:1px;background:var(--line);transform:translateY(-6px)}

/* ── 卡片 ── */
.card{
  background:#fff;border:1px solid var(--line);padding:32px 30px;
  transition:transform .3s,box-shadow .3s;position:relative;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(45,74,62,.08)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* ── 和我交流：板块卡 ── */
.talk-card{background:#fff;border:1px solid var(--line);padding:34px 30px;position:relative;overflow:hidden}
.talk-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:var(--green)}
.talk-card.t-phi::before{background:#7A5C8E}
.talk-card.t-inv::before{background:var(--gold)}
.talk-card.t-tech::before{background:#3D6152}
.talk-card.t-biz::before{background:#A0522D}
.talk-card .t-icon{font-size:1.6em;margin-bottom:10px}
.talk-card h3{font-size:1.3em;letter-spacing:.15em;margin-bottom:6px}
.talk-card .t-for{font-size:.85em;color:var(--gold);margin-bottom:14px}
.talk-card ul{list-style:none;margin-top:12px}
.talk-card ul li{
  font-size:.9em;color:var(--sub);padding:7px 0 7px 20px;position:relative;
  border-bottom:1px dashed var(--line);line-height:1.7;
}
.talk-card ul li:last-child{border-bottom:none}
.talk-card ul li::before{content:'“';position:absolute;left:0;color:var(--gold);font-family:var(--serif)}
html[lang="en"] .talk-card ul li::before{content:'"'}
html[lang="en"] .quote::before{content:'" '}
html[lang="en"] .quote::after{content:' "'}

/* ── 价格阶梯 ── */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price-card{background:#fff;border:1px solid var(--line);padding:36px 28px;display:flex;flex-direction:column;position:relative}
.price-card.featured{border:2px solid var(--green);box-shadow:0 16px 40px rgba(45,74,62,.12)}
.price-card .badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--green);color:#fff;font-size:.75em;padding:3px 16px;letter-spacing:.2em;
}
.price-card h3{font-size:1.2em;letter-spacing:.12em}
.price-card .price{font-family:var(--serif);font-size:2em;font-weight:700;color:var(--green);margin:14px 0 2px}
.price-card .price small{font-size:.45em;color:var(--sub);font-weight:400}
.price-card .p-note{font-size:.8em;color:var(--gold);margin-bottom:16px}
.price-card ul{list-style:none;flex:1}
.price-card ul li{font-size:.88em;color:var(--sub);padding:8px 0;border-bottom:1px dashed var(--line);line-height:1.7}
.price-card ul li::before{content:'· ';color:var(--gold)}
.btn{
  display:inline-block;background:var(--green);color:#fff;text-align:center;
  padding:13px 34px;font-size:.95em;letter-spacing:.2em;margin-top:22px;
  border:none;cursor:pointer;transition:background .25s;font-family:var(--sans);
}
.btn:hover{background:var(--green-2)}
.btn-outline{background:transparent;color:var(--green);border:1px solid var(--green)}
.btn-outline:hover{background:var(--green);color:#fff}

/* ── 流程步骤 ── */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:step}
.step{padding:26px 20px;text-align:center;position:relative}
.step:not(:last-child)::after{
  content:'→';position:absolute;right:-10px;top:38px;color:var(--gold);font-size:1.2em;
}
.step .s-num{
  counter-increment:step;font-family:var(--serif);font-size:1.5em;font-weight:700;
  color:var(--gold);
}
.step .s-num::before{content:counter(step,cjk-ideographic)}
.step h4{font-size:1em;margin:8px 0 6px;letter-spacing:.1em}
.step p{font-size:.82em;color:var(--sub);line-height:1.7}

/* ── 时间线 ── */
.timeline{position:relative;padding-left:36px}
.timeline::before{content:'';position:absolute;left:8px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-item{position:relative;padding-bottom:34px}
.tl-item::before{
  content:'';position:absolute;left:-33px;top:8px;width:9px;height:9px;
  background:var(--paper);border:2px solid var(--gold);border-radius:50%;
}
.tl-item .tl-year{font-family:var(--serif);font-weight:700;color:var(--green);font-size:1.05em;letter-spacing:.1em}
.tl-item p{color:var(--sub);font-size:.94em;margin-top:4px}

/* ── 书籍 ── */
.book-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.book{text-align:center}
.book-cover{
  aspect-ratio:7/10;background:linear-gradient(150deg,#E8DFCE,var(--paper-2));
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;position:relative;transition:transform .3s;
}
.book:hover .book-cover{transform:translateY(-5px)}
.book-cover .ph-hint{font-family:var(--serif);color:var(--sub);opacity:.45;writing-mode:vertical-rl;letter-spacing:.3em}
.book-cover img{width:100%;height:100%;object-fit:contain;background:#fff;display:block}
.book h3{font-size:1.08em;letter-spacing:.1em}
.book .b-meta{font-size:.82em;color:var(--sub);margin-top:4px}

/* ── 单本书详情布局 ── */
.book-feature{display:grid;grid-template-columns:280px 1fr;gap:36px;align-items:start;max-width:860px;margin:0 auto}
@media(max-width:820px){
  .book-feature{grid-template-columns:1fr;max-width:340px}
}

/* ── 文章列表 ── */
.article-item{
  display:flex;gap:24px;align-items:baseline;padding:24px 4px;
  border-bottom:1px solid var(--line);transition:background .2s;
}
.article-item:hover{background:rgba(184,146,46,.04)}
.article-item .a-date{font-family:var(--serif);color:var(--gold);font-size:.85em;white-space:nowrap;min-width:92px}
.article-item h3{font-size:1.08em;font-weight:600;letter-spacing:.04em}
.article-item h3 a{color:var(--ink)}
.article-item h3 a:hover{color:var(--green)}
.article-item .a-tag{font-size:.75em;color:var(--sub);border:1px solid var(--line);padding:1px 10px;margin-left:auto;white-space:nowrap}

/* ── FAQ ── */
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{
  cursor:pointer;padding:16px 0;font-weight:600;letter-spacing:.05em;
  list-style:none;display:flex;justify-content:space-between;align-items:center;
}
.faq summary::after{content:'＋';color:var(--gold);font-size:1.1em}
.faq details[open] summary::after{content:'－'}
.faq .faq-body{padding:0 0 18px;color:var(--sub);font-size:.92em}

/* ── 引文块 ── */
.quote{
  font-family:var(--serif);font-size:1.28em;line-height:2.2;color:var(--green);
  padding:36px 0;text-align:center;letter-spacing:.08em;
}
.quote::before,.quote::after{color:var(--gold);opacity:.6}
.quote::before{content:'“ '}
.quote::after{content:' ”'}

/* ── Footer ── */
.footer{
  background:var(--green);color:rgba(255,255,255,.75);
  padding:52px 0 40px;margin-top:80px;font-size:.88em;
}
.footer a{color:rgba(255,255,255,.85)}
.footer a:hover{color:#fff}
.footer-inner{max-width:1040px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.footer .f-name{font-family:var(--serif);font-size:1.3em;color:#fff;letter-spacing:.2em}
.footer .f-links{display:flex;gap:20px;flex-wrap:wrap}
.footer .f-copy{width:100%;text-align:center;margin-top:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.15);font-size:.85em;color:rgba(255,255,255,.5)}

/* ── 进场动画 ── */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ── 响应式 ── */
@media(max-width:820px){
  .year-grid{grid-template-columns:repeat(2,1fr)!important}
  .hero{padding:64px 0 50px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:2em}
  .grid-2,.grid-4,.price-grid,.book-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step:not(:last-child)::after{display:none}
  .nav-inner{flex-wrap:wrap;gap:12px}
  .nav-links{gap:14px;font-size:.95em}
  .article-item{flex-wrap:wrap;gap:8px}
}