/* ============================================================
   jidong.gold — 纪东不已 · Ever AIOS
   全站共用样式（唯一 CSS 文件，零外部依赖）
   视觉：低饱和暖色基底 + 深海蓝 + 龙鳞金点缀
   ============================================================ */

:root {
  --bg: #faf7f2;          /* 暖白基底 */
  --panel: #fffdf9;       /* 卡片暖白 */
  --ink: #2a251d;         /* 深灰近黑 */
  --muted: #6f675a;       /* 次级文字 */
  --faint: #9a9184;       /* 更弱文字 */
  --blue: #2c4a6b;        /* 深海蓝：标题层级与链接 */
  --blue-deep: #223a56;   /* 深蓝：页脚 */
  --gold: #c9a24b;        /* 龙鳞金：点缀 */
  --gold-ink: #96762c;    /* 金字（保证对比度） */
  --gold-soft: #efe4c8;   /* 金浅色底 */
  --line: #e8dfd1;        /* 暖色分隔线 */
  --radius: 14px;
  --serif: "Source Han Serif SC", "Noto Serif CJK SC", "Noto Serif SC",
           "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.015em;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 22px; }
.wrap-narrow { max-width: 740px; margin: 0 auto; padding: 0 22px; }

/* ---------- 文字层级 ---------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--blue);
  line-height: 1.4;
  font-weight: 700;
}
h1 { font-size: clamp(1.75rem, 4.5vw, 2.6rem); letter-spacing: 0.02em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.75rem); }
h3 { font-size: 1.15rem; }
p + p { margin-top: 0.9em; }
a { color: var(--blue); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover { border-bottom-color: var(--gold); }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }
.center { text-align: center; }

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  color: var(--gold-ink);
  font-weight: 600;
  margin-bottom: 14px;
}

.gold { color: var(--gold-ink); }

/* 金色细分隔线 */
.divider {
  width: 56px; height: 2px;
  background: var(--gold);
  border: none;
  margin: 22px auto;
}
.divider.left { margin-left: 0; }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 242, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between;
  padding-top: 12px; padding-bottom: 12px;
  gap: 6px 18px;
}
.brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--ink);
  border: none;
  white-space: nowrap;
}
.brand em {
  font-style: normal;
  color: var(--gold-ink);
  font-size: 0.78rem;
  font-family: var(--sans);
  letter-spacing: 0.08em;
  margin-left: 8px;
}
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.nav a {
  color: var(--blue);
  font-size: 0.95rem;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { border-bottom-color: var(--gold); }
.nav a.active { border-bottom-color: var(--gold); font-weight: 600; }

/* ---------- 区块 ---------- */
section { padding: clamp(48px, 8vw, 84px) 0; }
section + section { border-top: 1px solid var(--line); }
.section-head { margin-bottom: 34px; }
.section-head p { color: var(--muted); margin-top: 10px; max-width: 620px; }

/* ---------- Hero ---------- */
.hero { padding: clamp(64px, 10vw, 110px) 0 clamp(52px, 8vw, 80px); }
.hero h1 { margin: 14px 0 20px; }
.hero .claim {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--ink);
  line-height: 1.9;
}
.hero .claim strong { color: var(--blue); }
.hero .claim .gold { font-weight: 700; }
.hero-cta { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); border-bottom: none; }
.btn-primary { background: var(--blue); color: #fdfbf7; box-shadow: 0 4px 14px rgba(44, 74, 107, 0.22); }
.btn-primary:hover { background: var(--blue-deep); }
.btn-gold {
  background: transparent;
  color: var(--gold-ink);
  border: 1.5px solid var(--gold);
}
.btn-gold:hover { background: var(--gold-soft); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: 0 2px 10px rgba(42, 37, 29, 0.04);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.95rem; }

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* 文章卡 */
.post-card { display: flex; flex-direction: column; }
.post-card .tag {
  align-self: flex-start;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--gold-ink);
  border: 1px solid var(--gold);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 14px;
}
.post-card h3 a { color: var(--blue); border: none; }
.post-card h3 a:hover { color: var(--blue-deep); }
.post-card .meta { margin-top: auto; padding-top: 16px; font-size: 0.82rem; color: var(--faint); }

/* ---------- 价格 ---------- */
.price-card { position: relative; display: flex; flex-direction: column; }
.price-card.recommend { border: 1.5px solid var(--gold); }
.price-card .flag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--gold); color: #fffdf7;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.15em;
  padding: 3px 16px; border-radius: 999px;
  white-space: nowrap;
}
.price {
  font-family: var(--serif);
  font-size: 2.5rem;
  color: var(--gold-ink);
  font-weight: 700;
  line-height: 1.2;
}
.price small { font-size: 0.95rem; color: var(--muted); font-family: var(--sans); font-weight: 400; }
.feat-list { list-style: none; margin: 18px 0 24px; }
.feat-list li {
  padding: 7px 0 7px 26px;
  position: relative;
  font-size: 0.95rem;
  color: var(--ink);
  border-bottom: 1px dashed var(--line);
}
.feat-list li:last-child { border-bottom: none; }
.feat-list li::before {
  content: "";
  position: absolute; left: 2px; top: 15px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
}
.feat-list li.dim { color: var(--faint); }
.feat-list li.dim::before { background: var(--line); }
.price-card .btn { margin-top: auto; text-align: center; }

/* ---------- 信任条 ---------- */
.trust-bar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 10px;
  padding: 20px 24px;
  font-size: 0.92rem;
  color: var(--muted);
}
.trust-bar strong { color: var(--ink); }
.trust-bar ul { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 26px; margin-top: 6px; }
.trust-bar li::before { content: "· "; color: var(--gold-ink); font-weight: 700; }

/* ---------- FAQ ---------- */
.faq details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 22px;
  margin-bottom: 12px;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 17px 0;
  font-weight: 600;
  color: var(--blue);
  font-size: 1rem;
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--gold-ink);
  font-size: 1.25rem;
  font-weight: 400;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  padding: 0 0 18px;
  color: var(--muted);
  font-size: 0.95rem;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

/* ---------- 使命三角（纯 CSS） ---------- */
.tri { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; }
.tri .card { flex: 1 1 240px; max-width: 300px; text-align: center; }
.tri .card:first-child { flex-basis: 100%; max-width: 340px; }
.tri .tri-char {
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 6px;
}
.tri .tri-char span { color: var(--gold-ink); }

/* ---------- 四层架构（纯 CSS） ---------- */
.arch { display: flex; flex-direction: column; align-items: center; }
.arch-layer {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 22px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(42, 37, 29, 0.04);
}
.arch-layer h3 { margin-bottom: 4px; }
.arch-layer h3 span { color: var(--gold-ink); }
.arch-layer p { font-size: 0.88rem; color: var(--muted); }
.arch-1 { width: min(100%, 300px); border: 1.5px solid var(--gold); }
.arch-2 { width: min(100%, 420px); }
.arch-3 { width: min(100%, 540px); }
.arch-4 { width: min(100%, 660px); }
.arch-arrow {
  color: var(--gold);
  font-size: 1.1rem;
  line-height: 1;
  padding: 7px 0;
}

/* ---------- 战场日志 ---------- */
.log-item {
  display: flex; gap: 18px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.log-item:last-child { border-bottom: none; }
.log-date {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--gold-ink);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding-top: 4px;
  width: 92px;
}
.log-item h3 { font-size: 1.02rem; margin-bottom: 4px; }
.log-item p { font-size: 0.92rem; color: var(--muted); }
.log-src { font-size: 0.78rem; color: var(--faint); margin-top: 6px; }

/* ---------- 文章页 ---------- */
.post-head { padding: clamp(48px, 8vw, 72px) 0 30px; }
.post-head .tag {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold-ink);
  border: 1px solid var(--gold);
  border-radius: 999px;
  padding: 2px 14px;
  margin-bottom: 18px;
}
.post-head .meta { color: var(--faint); font-size: 0.88rem; margin-top: 16px; }
.post-body { padding-bottom: clamp(48px, 8vw, 80px); }
.post-body h2 {
  margin: 2.2em 0 0.8em;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  font-size: 1.35rem;
}
.post-body p { margin-bottom: 1.1em; }
.post-body ul { margin: 0 0 1.2em 1.4em; }
.post-body li { margin-bottom: 0.5em; }
.post-body strong { color: var(--ink); }
.post-body blockquote {
  border-left: 3px solid var(--gold);
  background: var(--panel);
  padding: 16px 22px;
  margin: 1.6em 0;
  color: var(--muted);
  border-radius: 0 10px 10px 0;
}
.post-body hr { border: none; border-top: 1px dashed var(--line); margin: 2.4em auto; }
.post-note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 1.6em 0;
}
.post-nav { padding: 26px 0 60px; border-top: 1px solid var(--line); font-size: 0.95rem; }

/* ---------- CTA 带 ---------- */
.cta-band { text-align: center; }
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: var(--muted); max-width: 560px; margin: 0 auto 28px; }
.wechat {
  display: inline-block;
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--gold-ink);
  border: 1.5px dashed var(--gold);
  border-radius: 10px;
  padding: 10px 26px;
  margin-top: 18px;
  letter-spacing: 0.06em;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--blue-deep);
  color: #cfc8ba;
  padding: 44px 0 34px;
  font-size: 0.88rem;
}
.site-footer .brand { color: #f3ede2; }
.site-footer a { color: #e5d9bd; }
.site-footer a:hover { border-bottom-color: var(--gold); }
.footer-grid { display: flex; flex-wrap: wrap; gap: 26px 60px; margin-bottom: 28px; }
.footer-grid h4 { color: var(--gold); font-size: 0.85rem; letter-spacing: 0.2em; margin-bottom: 10px; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 6px; }
.footer-legal {
  border-top: 1px solid rgba(201, 162, 75, 0.25);
  padding-top: 20px;
  color: #a99f8e;
  line-height: 2;
}

/* ---------- 移动端微调 ---------- */
@media (max-width: 560px) {
  .card { padding: 22px 20px; }
  .log-item { flex-direction: column; gap: 4px; }
  .log-date { width: auto; }
  .price { font-size: 2.1rem; }
}